During the rapid and rapid development of China's steel industry, the constraints of resources and energy have become prominent. The potential of steel materials is waiting to be tapped, and upgrading and replacement are extremely urgent. Rolling process is a behavior that affects the entire life cycle of materials and has a significant impact on society and the environment. In the future, rolling technology will develop in a green direction, with research and development focuses on innovative studies such as high-precision forming, high-performance performance, reduced composition design, and clean emission reduction processes. To address a number of cutting-edge, strategic and key, common issues in order to promote the development of rolling technology in our country. Since the late 20th century, the world's steel production has grown rapidly and the steel industry has made tremendous progress.

By 2012, the world's steel output had reached 1.4 billion tons. Among them, the development of Asian countries such as China and India has played a leading role. The development of the steel industry in these countries has supported their own economic take-off and also promoted the prosperity of the international economy. The pillar role of the steel industry in the national economy is fully demonstrated here. However, while the rapid and rapid development of the steel industry has addressed the urgent needs of the national economy and exerted positive energy, it has also caused a series of problems. Firstly, the constraints of resources and energy have become prominent. A large amount of resources such as ores and ferroalloys are dependent on imports, and the lifeline of development is basically in the hands of a few foreign mining giants. Environmental problems such as pollution and emissions have seriously endangered social development and people's lives. However, our products, especially those with large quantities and wide applications, are still at a relatively primary stage. The potential of steel materials is yet to be tapped, and upgrading and replacement are extremely urgent. Recycling has become an important agenda item.

1 The green characteristics of rolling technology

Facing this severe situation, the issue of green development in the steel industry has become a common concern for steel workers and even the entire society. The so-called greening means saving resources and energy. Reduce emissions, be environmentally friendly and easy to recycle; The product features low cost, high quality and high performance. This should be the goal of all steel workers and also the most fundamental feature of modern steel technology.

Rolling is a process for forming steel materials in the steel industry. It is a technological process for large-scale production of steel materials and the most important method for forming steel materials. More than 90% of the steel smelted must go through the rolling process to become usable steel. The rolling sector directly faces various industries of the national economy, is closely related to pillar industries of the national economy such as automobiles, construction, energy, transportation, and mechanical manufacturing, and is also closely linked to people's lives. Due to the large production volume, diverse varieties and wide application in various sectors of the national economy of steel, the rolling industry is one of the basic industries for the development of the national economy. Rolled products are applied in various industries, thus undergoing the test of practice and practical application, influencing the behavior of materials throughout their entire life cycle, and having significant impacts on society and the environment. Therefore, greenness is also a characteristic of the rolling process and should be the core for us to learn and master rolling technology.

The green characteristics of rolling technology are specifically reflected in the following four aspects in the innovation of the rolling process and the research and development of rolling products, namely: high-precision forming; High-performance performance; Design of reduced ingredients Emission reduction clean process.

1.1 High-precision forming: High-precision rolling technology

Rolling technology emerged in Europe in the 16th century, but its large-scale development did not begin until the early 20th century. Before World War II, the main task of the rolling process was to form, with the goal of continuously increasing production and meeting the social development needs of Europe and America at that time. From single machines to continuous ones, the scale has been continuously expanding. Continuous hot rolling mills and continuous cold rolling mills have successively come onto the historical stage. After World War II, the urgent demands of the steel industry in terms of scale, quantity and quality required the support of automation technology. The large-scale adoption of automated production lines by user industries has put forward increasingly higher requirements for product precision, driving the development of rolling technology. Since the 1950s, in order to ensure the forming accuracy and quality of materials, the automation and continuity of the rolling process have gradually become an important development trend. Especially research institutions such as BISRA in the UK have carried out pioneering work on the precision control of the rolling process, starting from the automatic thickness control technology. Subsequently, as a country undergoing post-war recovery and reconstruction, Japan, in the process of large-scale steel plant construction, took advantage of its latecomer status and proposed the construction goals of large-scale, continuous and automated steel plants. These goals were implemented in the construction and research of the rolling process, integrating rolling technology with automation technology. Raise the levels of automation, informatization and comprehensive equipment of rolling technology to a new height.

For plate and strip steel, the external dimensions include thickness, width, plate shape, plate convexity, planar shape, etc. Among all the dimensional accuracy indicators, the thickness accuracy indicator is the most fundamental and important one. Through the high-precision setting of the rolling process control computer and the improvement of the basic automated AGC control system, the thickness accuracy has reached a very high level. In order to improve the plate shape quality of strip steel, considerable progress has been made in plate shape control technology. In addition to the common means such as the design of roll profile curves and the distribution of rolling loads, the improvement of hardware levels, especially the improvement of the rolling mills themselves, has played an important role. The emergence of new models such as CVC, PC, HCW, and DSR has provided powerful means for the shape control of plate and strip steel, and the control quality has made a qualitative leap. Planar shape control is a key technology for improving the yield of medium and heavy plates. In the field of planar shape control technology, the combination of vertical roll rolling mills and the MAS method can achieve the best control effect and significantly increase the yield of medium and heavy plate rolling mills.

The latest progress in dimensional accuracy for section steel and bar and wire rod rolling mills is the adoption of high-precision finishing rolling technology. That is, a high-precision sizing rolling unit is installed behind the finishing rolling frame of the section steel rolling mill. Through this unit, the dimensions of the products are further regularized to achieve high-precision forming of product dimensions. This technology includes HPR (High Precision Rolling) technology, Tekisun units and PSB (Precision Sizing Block) units.

As users' demands for products continue to rise, the surface quality issue of products has also become a serious problem restricting market expansion. In addition to high-pressure water descaling, the quality and maintenance of the cooling water system, the cleanliness of the water quality, and the improvement of lubrication technology can all significantly enhance the surface quality of steel. In recent years, through the reasonable design of steel composition, the optimization of descaling process and the control system of rolling temperature, the thickness and structure of the oxide scale on the surface of steel can be controlled, and acid-free and acid-reduced steel can be produced. This is an important progress in the control of steel surface quality.

1.2 High-performance performance: Microstructure and performance control based on physical metallurgy theory

The rolling process is one that endows metals with certain dimensions and shapes, and it is also a process that gives metallic materials certain structures and properties. Therefore, the rolling process is also a metallurgical process.

The brittle fracture of welded ships during World War II reminds people that they should pay attention to the performance of materials, especially their toughness. Based on this understanding, after World War II, the research journey on controlled rolling and controlled cooling technology began. The research and development of rolling technology started to delve from the external dimensions to the internal microstructure and properties of materials. By the 1960s, the role of alloying element Nb in steel had received attention. Based on the research on the application of Nb in steel, people started from controlled rolling to study the influence of the rolling process on the material properties. The rolling process not only endows the material with the required shape and size, but also can change the structure of the steel and improve or even endow it with new properties. This has gradually become a consensus among people. In the 1970s, controlled cooling technology, as a fundamental technique for controlling phase transformation, was applied to steel rolling production, ushering in a brand-new stage in the control of the microstructure and properties of hot-rolled steel. Controlled rolling and controlled cooling technology, as one of the most important technologies for controlling the properties of steel materials, has been continuously expanding and deepening, becoming an important support for the rapid development of steel technology in the second half of the last century.

Based on the theory of physical metallurgy, through the optimization of material chemical composition and the improvement of process systems, the quality of existing steel grades has been significantly enhanced, and a large number of excellent new steel grades have been developed. The realization of controlled rolling and controlled cooling for hot-rolled products is the key to improving product quality and added value, developing new varieties, and increasing the economic benefits of enterprises. By controlling rolling and cooling, some important steel grades, such as pipeline steel, pressure vessel steel, steel for construction machinery, bridge plates, shipbuilding plates, bainitic steel, duplex steel, TRIP steel, etc., have all been developed, making significant contributions to economic development and social progress.

Since the beginning of the 21st century, steel rolling workers at home and abroad have proposed a new generation of TMCP technology with ultrafast cooling as the core in response to the problems existing in the traditional controlled rolling and controlled cooling technology. The new generation of controlled rolling and controlled cooling technology adopts a controlled cooling system with adjustable cooling rate, capable of achieving extremely high cooling speed and uniform cooling. It comprehensively employs multiple strengthening mechanisms such as fine grain strengthening, precipitation strengthening, and phase transformation strengthening to control the phase transformation process of steel, which can significantly enhance the performance of steel and fully tap the potential of steel materials. A large number of practices on several successfully developed hot-rolled strip steel, medium and heavy plate, and H-beam production lines have proved that the innovative rolling process characterized by the new generation of controlled rolling and controlled cooling can significantly improve the performance of steel, reduce the usage of alloying elements, lower the production cost of steel, and play an important role in saving resources and energy and reducing emissions. It has an extremely broad application prospect.

In recent years, scientific and technological workers have proposed the "integrated process TMCP" technology for the hot rolling process. This technology controls the microstructure and properties of the entire process from solidification - hot rolling - cooling - heat treatment as a whole, thereby comprehensively improving the performance level of steel. It can be applied not only to the long process of traditional thick slab continuous casting, but also to the short process of thin slab continuous casting and continuous rolling as well as the short process of thin strip continuous casting, and has obvious energy conservation and emission reduction effects.

1.3 Design of reduced ingredients　

By the turn of the century, with the increasingly acute issues of resources and energy, the environment and global warming, the development of energy-saving, resource-saving, emission-reducing and environmentally friendly rolling technologies has become an urgent and pressing problem. The steel industry is under tremendous pressure to undergo a complete transformation.

The tetrahedron of materials research clearly explains the basic elements in materials research, namely the relationship among chemical composition, preparation and processing technology, structure and performance. Composition and process determine the structure and performance of materials. Therefore, reasonable composition design and advanced preparation processes have become the most important factors determining the performance of materials. To this day, the relationship of tetrahedrons remains, but the idea of reduction has been deeply rooted in it, endowing it with new connotations. Considering the green characteristics of steel preparation technology, resource-conserving composition design has become a major trend. This means that in terms of composition design, under the premise of ensuring quality, the amount of alloying elements should be reduced as much as possible, or low-cost elements should be used to replace high-value ones. While achieving the reduction of composition design and lowering the cost of steel, it is also more conducive to the recycling of materials.

From the perspective of the tetrahedron of material research, adopting a reduced composition design shifts more pressure onto the production process, which requires us to develop processing methods that save resources and energy, reduce emissions, and are environmentally friendly. In this case, with the same consumption of resources and energy and the same composition design, the material performance can be improved through processing. This point is of great significance for the upgrading and replacement of products that are widely available in large quantities.

For instance, car designers hope to reduce the weight of the vehicle body to save energy and reduce emissions. At the same time, it is also hoped to enhance the strength, rigidity and plasticity of the car to increase its safety. Against this backdrop, advanced high-strength steel (AHSS) for automobiles emerged and developed rapidly. Through the combination of strengthening methods such as fine grain, precipitation, and phase transformation, new steel varieties like duplex steel (DP), deformation-induced plasticity steel (TRIP), twin-induced plasticity steel (TWIP), and quenched and distributed steel (Q&P), along with their corresponding production processes, have continuously emerged and been rapidly applied, promoting the advancement of automotive production technology. For instance, with the development of the energy industry, the quantity of oil and gas transported has increased, and the quality of oil and gas has diversified. As a result, the steel used for pipelines transporting oil and gas has developed rapidly. Up to now, in order to increase the conveying capacity, the strength grades of steel have been continuously improved, gradually evolving from X42 to X60, X65, X70, X80, X100, and X120. The thickness of steel is also constantly increasing. The diameter of steel pipes is constantly increasing. During this process, through organizational regulation, the microstructure of the steel gradually transitions from ferrite-pearlite to acicular ferrite, bainite, and even martensite, significantly enhancing the material's performance. At the same time, in response to the different qualities of oil and gas resources and different usage conditions, various corrosion-resistant pipeline steels such as those resistant to H2S and CO2 corrosion, as well as pipeline steels resistant to large deformations and submarine pipeline steels, have been developed. This imposes extremely strict requirements on both the smelting and rolling of steel.

The annealing process is an important procedure for the quality control of cold-rolled products. In addition to the traditional bell annealing, continuous annealing has achieved considerable development in recent years. The continuous annealing furnace has good plate shape quality and uniform plate performance. By controlling the heating rate, holding temperature and time, and cooling rate during the continuous annealing process of steel plates, the performance of steel plates can be adjusted within a wide range. It is an important equipment for manufacturing advanced automotive high-strength steels such as cold-rolled duplex steel and TRIP steel. By adopting appropriate induction heating methods, rapid heating of steel plates can be achieved. High cooling rates can be obtained through high-hydrogen, all-hydrogen jet cooling, water quenching and other means. These new process technologies and equipment of continuous annealing equipment have played a key role in improving the quality of steel plates and developing new varieties.

1.4 Emission reduction clean process　

The adoption of continuous casting technology can significantly reduce energy consumption, increase the yield of finished products and the quality of rolled products. The development of continuous casting technology has promoted the progress of related rolling technologies, especially the development of continuous casting and rolling connection technologies, such as hot loading and direct rolling technologies as well as slab width adjustment technologies, which play a certain role in energy conservation and emission reduction in the rolling process.

Short-process steel production technology is a hot spot in development and application. At the turn of the century, China, in line with the development trend of short-process technology internationally at that time, introduced a batch of compact process hot continuous rolling production lines, including CSP and FTSR, totaling 11 sets. Based on the introduction, technological innovation was carried out. Important fundamental theoretical issues such as the mechanical property characteristics, strengthening mechanism, and precipitate characteristics of short-process produced steel were studied. Production technologies for short-process production line products with Chinese characteristics were developed, such as high-strength container steel, microalloyed high-strength steel, duplex steel, cold-rolled base materials, and electrical steel, among other characteristic products. It has made significant contributions to the development of thin slab continuous casting and continuous rolling technology internationally.

The continuous rolling process is an important direction for the development of rolling technology. Headless rolling is a new development of continuous rolling. The cold rolling mill was the first to realize the headless rolling technology through pre-rolling welding, post-rolling cutting and dynamic specification changes during rolling. In the 1980s, cold continuous rolling was connected with pickling units, and the headless rolling technology of pickling - cold rolling continuous unit (CDCM) was established. This is the main model of cold rolling mill construction in recent years.

In the 1990s, Kawasaki Steel of Japan successfully developed a continuous hot rolling headless rolling technology for conventional slabs by welding the intermediate billets of hot continuous rolling together. By continuously providing billets with constant temperature and cross-section to the tropical finishing mill group, hot-rolled strip steel with almost constant shape, size, structure and performance is rolled out, which greatly simplifies the automatic control system of hot rolling and improves product quality. In recent years, POSCO of South Korea has achieved headless rolling in hot continuous rolling by connecting intermediate billets in front of the finishing mill of the hot continuous rolling mill through mechanical shear-pressing methods. ARVEDI of Italy has successfully developed the ESP headless rolling technology based on the thin slab continuous casting and continuous rolling technology. POSCO of South Korea has successfully developed the poCEM headless rolling technology by transforming the ISP short-process production line. Headless rolling technology has played a significant role in the rolling of thin-gauge hot-rolled strip steel and "hot-rolled strip cold" and other aspects.

Double-roll thin strip casting and rolling technology is the cutting-edge technology for thin strip production in the world today. It directly produces thin strip billets with a thickness of 1-5mm from liquid molten steel. Its characteristic is that metal solidification and rolling deformation occur simultaneously, completing the entire process from liquid metal to solid thin strip in a short time. Compared with the traditional thin strip production process, it reduces equipment investment by about 80%, lowers production costs by 30% to 40%, and consumes only 1/8 of the energy of the traditional process. The process is more environmentally friendly (for example, CO2 emissions only account for 20% of the traditional process).

The Castrip equipment at Nucor's Indiana plant in Crawford Ville, USA, is the world's first industrial device to produce ultra-thin strip steel (UCS) using the two-roll strip continuous casting method. Since its commissioning in 2002, this equipment has produced both ordinary low-carbon thin steel plates and HSLA thin steel plates. The poStrip thin strip continuous casting technology of POSCO in South Korea is mainly used for the production of austenitic stainless steel. China began to conduct research on thin strip continuous casting technology in the 1950s. In recent years, China has started to carry out practical research on industrialization and is currently building production lines. The focus of the research work lies in exploring which materials can achieve high performance and new properties that cannot be obtained by conventional methods through the application of casting and rolling technology, and has made significant progress in the thin strip continuous casting of high-phosphorus carbon steel, ferritic stainless steel, silicon steel and TWIP steel.

In the fierce market competition, in order to meet the needs of users for multiple varieties, small batches and short delivery times, and to simplify the steelmaking and continuous casting processes, there is an urgent need to develop flexible rolling technologies.

In the production process of hot-rolled strip steel, the adoption of free flow rolling (SFR) can break through the limitations of the rolling procedures. This technology essentially integrates almost all modern hot-rolled sheet and strip rolling techniques, eliminating the strict restrictions imposed on width, thickness, steel grade, final rolling temperature, and the range of coiling temperature jumps in the previous rolling program compilation. It greatly enhances the flexibility of the hot-rolled rolling process.

In the steelmaking and continuous casting process, steel grades are consolidated, and in the rolling stage, the rolling and heat treatment processes are optimized to achieve a "customized production" mode tailored to user requirements. This transformation of the production mode, under the premise of simplifying steelmaking and continuous casting production and reducing management difficulty, achieves the goal of "one steel with multiple functions" through intensive production methods, reducing the quantity and types of steel grades. This technology is based on the microstructure performance prediction technology and simultaneously applies artificial intelligence technology for optimization, conducting reverse optimization of the rolling process parameters.

The free program rolling technology for section steel and bar and wire rods relies more on equipment and hole design. For instance, by adopting the flat roll rolling technology, the limitations of the rough rolling extension hole type can be avoided. In the rolling process of H-beams, in order to be able to roll multiple specifications using the same set of hole shapes, new rolling methods and new types of rolling mills that can change the outer width and internal dimensions as well as the height of H-beams have been developed abroad. In the production of bar steel, flat steel, Angle steel, etc., the hole-free flat roll rolling technology can be adopted on the extension unit to enhance the flexibility of production. In the rolling of bar and wire rods, by rolling several similar specifications of products, the freedom of production has been expanded.

2 Development countermeasures of rolling technology　　

To engage in research on modern rolling technology, it is necessary to base on the green characteristics of modern rolling technology, clarify the research direction, sort out the research ideas, and master the research methods. The following aspects are what we must pay attention to.

2.1 Set a clear direction and aim for the goal of greening　

Since greenness is a characteristic of modern rolling technology and the goal we pursue, the overall research direction must focus on the greenness of the rolling process, constantly exploring the cutting-edge, strategic issues and key, common problems in the industry related to "high-precision forming, high-performance performance, reduced composition design, and clean emission reduction processes". At the forefront of the discipline and in production practice, identify problems, solve them and innovate for development. The endless development and ascent of objective demands, as well as the traction and influence of the development of related disciplines, technologies and industries, all provide ample space for the development of rolling process technology and excellent opportunities. In the face of such a situation, as scientific and technological workers majoring in Materials Forming and Control engineering, we should strive to carry out innovative work around the general direction and essential characteristics of greenness, and maintain the sustainable development of steel rolling technology.

2.2 Integrated innovation of process - equipment - product - service

To promote the development of rolling technology, it is necessary to focus on cutting-edge, strategic issues and key, common problems, seize the integrated innovation of "process - equipment - product - service", and enhance our research level as a whole. "Craftsmanship" is the leading force, "equipment" (including automation) is the means, "product" is the result, and "service" is the ultimate goal.

Only major innovations in technology and equipment can bring about significant innovations in products and applications. If the processes and equipment are not improved, although they can be optimized and adjusted, it will be difficult to bring about essential changes to the products and achieve substantial breakthroughs. Therefore, technology is the leading force and equipment is the means. Only by starting the innovation process from here can there be a possibility of a major breakthrough.

The so-called "service" means that the steel rolling mill, by delving into the user's enterprise and "getting involved in advance" in the user's R&D process, clarifies the user's market demands and research directions, thereby defining the R&D direction of the steel rolling mill. Through high-quality, targeted and advanced products, it serves its users and the market. Products need to undergo deep processing in the user's factory, including coating, cutting, slitting, welding, cold bending, mechanical processing, lamination, etc. There are numerous methods. This field has received increasing attention from people and has seen new developments, putting forward many new demands. For instance, in the subsequent processing of automotive steel, advanced deep processing technologies such as laser welding, hot forming, and hydraulic pipe forming have been developed. While these technologies have made significant contributions to the development of the automotive industry and energy conservation and emission reduction in the automotive sector, they have also put forward higher requirements for metallurgical plants. Metallurgical plants actively participate in the R&D process of users to meet their constantly evolving needs.

2.3 Extend the innovation chain from research and development to the entire industrialization process　

In the process of technological innovation, the biggest problem currently encountered is how to break through the bottleneck of transformation and quickly convert achievements into productive forces. One very important issue here is that this innovation chain must be a complete one. Technological innovation starts with research and development (R&D), but it is not the end. R&d needs to extend to the entire innovation chain (R&DES), to engineering, to the entire industrialization process, and to broader fields of the economy and society. During this process, the achievements were rapidly transformed, and the bottleneck problems were thus broken.

Rolling technology is an engineering science. The innovation of rolling technology cannot do without engineering, and the cultivation and training of talents in rolling also cannot do without engineering. Engineering is scientific practice and a 100% realistic laboratory. The origin of innovative research is engineering practice, and engineering implementation is the process of transforming achievements. It will cultivate students' abilities to conduct research, design and engineering simultaneously. Engineering is a stage for multi-disciplinary collaboration. The talents who master interdisciplinary knowledge and key core technologies cultivated in engineering practice are what we need most. Meanwhile, engineering involves a broader range of fields and personnel from all walks of life. It requires participants to have the ability to fully utilize social resources and mobilize various forces for collaborative innovation. This plays a very important role in cultivating talents who are "socially responsible, innovative and practical". Therefore, extending and expanding from R&D to R&DES is of great significance for the completion of our innovation process and the cultivation of innovative talents.

2.4 The intersection of rolling technology with automation technology and information technology is inevitable　　

Modern engineering problems are basically multi-disciplinary issues. Promoting interdisciplinary integration in engineering practice, increasing interdisciplinary knowledge, and solving problems encountered in research are the inevitable paths for the development of modern engineering technology. The development of rolling technology requires the support of related disciplines and modern technology. Interdisciplinary integration is a necessary condition for the development of rolling technology.

First of all, the object of the steel rolling process is steel materials. To process and roll out high-quality steel materials, a profound understanding of the object being processed, that is, steel materials, is required. When the processor has a very clear understanding of the material, even surpassing that of material experts, the control of material structure and properties during the rolling process will become the "prized possession" of the processor, and the development and progress of the processing process will become inevitable. Therefore, rolling workers need a solid foundation in materials.

Secondly, the high-precision forming and molding in the rolling process cannot be achieved without modern automatic control technology and information technology. The core contents of rolling process control, such as the description of deformation laws during the rolling process, the establishment and application of mathematical models for the rolling process, and the formulation of control rolling and control cooling regulations, are all closely related to automation technology and are realized through it. This kind of relationship is "unbreakable and tangled". Only intersection and integration are the only feasible paths. Therefore, the intersection of rolling technology with automation technology and information technology is imperative and should be vigorously promoted. On the basis of the current realization of automation, it is a new and important direction to adopt artificial intelligence technology as much as possible to achieve artificial intelligence control of the rolling process. In this regard, the application of artificial intelligence technologies such as ANN (Artificial Neural Network), Fuzzy logic, and expert systems for the diagnosis, optimization, and control of processes, as well as information processing, holds a very broad development prospect. With the development of modern information technologies such as the Internet of Things, wireless mobile networks, and cloud computing, rolling technology and its automation technology will embrace unprecedented innovation opportunities.

2.5 Establish a rolling research platform to carry out high-level scientific practices　

Rolling technology is a practical science. It originated from practice and must be applied in practice. Laboratories and enterprises engaged in rolling production are the best bases for researching rolling process technology and also ideal platforms for the transformation and application of innovative rolling process technology. In the process of delving into laboratories and enterprises, problems existing in production practice can be discovered, and new demands of users for rolled products can be understood. This is the starting point of innovation and also its original driving force. Through laboratory research, new design schemes, new process regulations and new production methods have been developed. However, they still need to be returned to the enterprise for practical testing and application to verify their feasibility and correctness, identify existing problems and come up with new ideas for further research. Therefore, delving into enterprises and laboratories, engaging in front-line work, grasping first-hand materials, conducting first-hand inspections, and achieving continuous innovation are the inevitable paths to learning and developing rolling process technology.

To this end, it is necessary to establish an international first-class experimental innovation platform to create practical conditions for researchers. A research platform for rolling technology innovation has been established at Northeastern University, serving both postgraduate and undergraduate students. Recently, Northeastern University is planning the construction of a new platform in connection with the 2011 Collaborative Innovation Program. In the future, the existing platform will mainly serve undergraduate students, while the new platform will mainly serve postgraduate students and teachers. At that time, students will be cultivated in the laboratory and receive practical education from the moment they enter the school. In grades 1 and 2, students will be influenced by practical environments. In Grade 3, determine the direction and join the research group. In the fourth grade, conduct graduation research in combination with major topics. Draw nourishment, grow and develop in research practice, cultivate an innovative spirit and enhance practical ability.

Expanding the platform for off-campus enterprises to cooperate in industry-university-research collaboration is an even more important measure. It is particularly emphasized that students should conduct research on the 1:1 large platform of enterprises. Students should carry out research on topics and papers in combination with the major scientific research projects they undertake. This is of great significance for cultivating new talents with innovative spirit.

2.6 International development perspective　

To master modern rolling technology, it is necessary to understand the core of rolling technology and the cutting-edge of science and technology, and to grasp the current development status and trends of modern rolling technology. This requires us not only to understand the content of textbooks, but also to be able to carry out extensive and effective academic exchanges and scientific research cooperation. Through various means such as international conferences, visits and exchanges, academic lectures, as well as media such as books, magazines, the Internet and films, we should understand the rich and colorful world of this discipline and be aware of the latest developments in rolling technology. So as to keep pace with the rapidly developing cutting-edge of rolling technology.

3 Conclusion　　

When we step into a modern rolling mill to appreciate the development of rolling technology and its achievements, we will find that modern rolling technology is bold and heroic, and also appreciate its delicacy and fineness. We will sincerely exclaim: This is not a large-scale production process at all; it is clearly a masterpiece of craftsmanship! This is by no means an industrial product on the production line; it is clearly a masterpiece of art!

At the same time, we should also recognize that rolling technology is still far from meeting the demands of society. Its emissions, consumption and negative impact on the environment are pricking our hearts and motivating us to carry out innovative research. To achieve reduction in the rolling process, to make the rolled products more advanced, and to achieve harmony between rolling and the environment, intelligence and informatization are extremely important supports in this process. Under this new situation, in order to adapt to the new requirements of social development, the steel rolling process must undergo a complete transformation. It is necessary to recreate a brand-new, energy-saving, low-cost and reduced-volume green steel rolling process. This brand-new process should be able to meet the new requirements of the new era, which include saving resources and energy, reducing emissions, being environmentally friendly and having excellent performance. From this perspective, rolling technology is still very young, and it is not an exaggeration to call steel materials "new materials".

Today, more than ever before, the green features of modern rolling technology should be highlighted. We should focus on conducting innovative research around "high-precision forming, high-performance performance, reduced composition design, and clean emission reduction processes", solve a number of frontier, strategic, key and common problems, and promote the development of rolling technology in China. In the development of rolling technology worldwide, Leaving the mark of the Chinese people will be a long-term, arduous and glorious task for China's rolling science and technology workers.