Duplex stainless steel is a strategic key product of SXTG Stainless Steel Technology Group. It has experienced many breakthroughs in key technologies, and its annual demand is increasing year by year in many fields. As the person in charge of the duplex stainless steel R&D project, the R&D team of SXTG took the lead in China to successfully develop a series of products such as duplex stainless steel plates, tubes, rods and wires with different nitrogen content and different performance levels. The performance has reached the international advanced level of similar products. Imports have occupied the first place in the Chinese market for many years, leading the development of duplex stainless steel in China.
SXTG’s R&D team broke through a number of key process technologies. Take the lead in the development of microalloying technology for duplex stainless steel, realizing the reasonable matching of low-temperature toughness and high-temperature strength; breaking through the nitrogen alloying technology of argon-oxygen furnace, achieving precise control of nitrogen content in different ranges; researching the welding of duplex stainless steel Process, provide technical support for product promotion.
High-alloy heat-resistant stainless steel sheets have been widely used in high-temperature industries such as domestic power stations and boilers. Due to the difficulty of production, China’s demand in the past mainly came from imports, which were expensive and had a long delivery cycle. The R&D team of SXTG has researched and developed rare earth heat-resistant stainless steel, and has successively solved the technical difficulties of quantitative addition of rare earth in stainless steel and stable recovery, control of low oxygen content in the smelting process, and continuous casting nozzle nodules of rare earth stainless steel, and successfully developed high performance Rare earth heat-resistant stainless steel. The product performance has reached the advanced level of similar foreign products, filling the gap in China, and the authorized invention patent won the gold medal of the 19th National Invention Exhibition.