Recently, during the upgrade and renovation of the CSP (continuous casting and rolling of thin slabs) production line of Jiugang Group Hongxing Hongyu New Materials Company, JISCO technicians broke the bottleneck of the CSP production line by integrating equipment resources and optimizing process routes, and opened up a new process path of "No. 6 continuous casting machine + stainless steel furnace coil hot rolling". They successfully rolled more than 100 tons of acid-resistant steel 09CrCuSb (ND steel), and significantly improved indicators such as product edge quality, plate shape and cold bending performance.
It is understood that acid-resistant steel (Price) 09CrCuSb is widely used in power, petrochemical, environmental protection equipment and other fields due to its excellent resistance to sulfuric acid dew point corrosion, and the market demand has continued to grow in recent years. However, the production of such alloy steel using CSP production lines faces problems such as edge crack sensitivity and unstable cold bending performance. To this end, the R&D personnel of Hongyu New Materials Company, the Carbon Steel Strip Research Institute of JISCO Steel Research Institute and the technical personnel of the Stainless Steel Branch strengthened cooperation to jointly study the characteristics of acid-resistant products, combined with the characteristics of Hongyu New Materials Company's No. 6 continuous casting machine and the hot rolling production line of the Stainless Steel Branch, refined the smelting and rolling process parameters, and compiled test plans to ensure the one-time success of product development. In response to the risk of cracking on the edges of steel grades, the company's technical personnel optimized the composition design and continuous casting process, which led to continuous improvement in the edge quality and surface finish of thick-gauge steel strips, and key indicators such as strength and toughness reached the advanced level of the industry.
The successful development of acid-resistant steel 09CrCuSb is another practice of in-depth cooperation among JISCO factories.