China's special steel manufacturer MG Group realized industrial production of "Research and Application of Key Manufacturing Technology for Hot-Rolled H-Beams for Structural Use in Alpine Areas" and won the first prize of the 2017 Metallurgical Science and Technology Award. This project is aimed at the development needs of the national energy strategy of Masteel, so that oil and gas extraction and materials first. The project was started in early 2010.
After independent research and development, it is based on the new microalloying design, analysis and development of shaped billet molds, and innovative principles and processes of full-process controlled rolling and cooling. Many technical problems, such as infiltration, uneven product performance, and poor stability, have successfully developed -40 ° C, -50 ° C, and -60 ° C series hot-rolled H-beams for structural use in high and cold regions, and achieved industrial production. The impact energy of the product at -60 ℃ reached 107-282J, with an average value of 182J, which reached the domestic leading level. Realize import substitution, meet the urgent needs of polar equipment construction at home and abroad, significantly enhance the national hot-rolled H-beam industry competitiveness and brand influence, ensure the strategic safety of high-performance materials in the industrial chain, and support domestic and foreign key projects and transportation Development, to provide the guarantee of high-performance structural steel materials for the implementation of the "Belt and Road" strategy.
Through the research of this project, Magang declared 6 national invention patents (4 authorized), presided over the drafting of 1 national standard and 2 line standards, formed 9 technical secrets of the enterprise, and published 7 scientific and technological papers. The manufacturing and application technology of hot-rolled H-beams for structural use in high-cold areas with property rights has reached the leading domestic level and the advanced international level. It was the first in China to obtain the European Union CE certificate, the first to pass the French Technip certification, and the first to obtain the French Total's global oil and gas project supplier qualification, filling the domestic gap. And the only hot-rolled H-shaped steel with a flange thickness of 4.5 ~ 50mm in China is fully covered. At present, the product has achieved sales of 314,400 tons, with an increase in output value of 1,522 million yuan, and an increase in profits and taxes of 504 million yuan.
The innovative key technology developed by this project can solve the technical problem of grain refinement of steel products under the condition of limited compression ratio, and has a significant industry demonstration effect. The key technology of the project can be popularized in the super-large and super-thick hot-rolled H-beam production line to solve the problems of deformation and penetration, uniformity of deformation, and uniform control of structural properties of heavy H-beams. , In order to achieve high-quality ultra-thick hot-rolled H-shaped steel (flange thickness of 115mm, web height of 1000mm) made in China, laid the foundation for China's hot-rolled H-shaped steel comprehensive manufacturing capacity in the forefront of the world.