The Future Development Direction of Cold Roll
The development of cold rolls is driven by the cold rolling industry and roll manufacturing related technologies. From the actual demand of the cold rolling industry, increase the wear resistance, roughness retention performance, accident resistance performance, uniformity and other indicators of the roll, the requirements are getting higher and higher, and the purpose is to achieve free rolling, rolling high-grade plates, reducing roll consumption, and better cooperation with rolling mill bearings. Driven by these requirements, roll manufacturing companies are also constantly striving to improve and innovative roll manufacturing technology, specifically as follows:
(1) The alloy composition of forged steel rolls continues to increase. The application of 5%Cr, 8%Cr, semi-high-speed steel, high-speed steel and other high-alloy steels on cold rolls is a trend. At the same time, the material of the rolls will maintain a variety of Adapt to the needs of different rolling conditions.
(2) The application of new roll blank composite manufacturing technology. In order to meet the requirements of high wear resistance on the surface of rolls and high comprehensive mechanical properties of the core, some manufacturers have been exploring new surface composite technologies such as electroslag casting, CPC, OSPRAY and so on in roll blanks. Trial on preparation.
(3) The application of new roll heat treatment and processing technology. The application of large-scale CNC machine tools, the trial of computer-controlled heating furnaces and quenching equipment can increase the manufacturing accuracy and surface uniformity of rolls, and meet the needs of high-end rolling mills.