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随着我国冶金、化工、石油等工业的发展,极低温材料的应用愈来愈多。目前,深冷设备仍耗用大量的不锈钢、铜、铝等贵重材料。因此,研制无铬镍的极低温用钢具有重大意义。鞍钢工人阶级遵照毛主席“打破洋框框,走自己工业发展道路”的教导,创造了具有我国特色的20锰23铝单相奥氏体无磁性钢,并在有关单位的密切配合下,先后进行了四次焊接容器“土法”低温(—196℃)爆破实验。实验表明:20锰23铝钢综合性能良好。和不锈钢比,其强度高,韧性、塑性和延性好,而可加工性、焊接工艺性则和铬镍奥氏体不锈钢相仿。该钢热轧状态可以满足—196℃极低温用钢的要求,可以代替铬镍不锈钢、铜、铝用于制造极低温容器的设备。该钢还适合制造抗磁设备。
With the development of China’s metallurgy, chemical industry, petroleum and other industries, the application of extremely low temperature materials is more and more. At present, cryogenic equipment still consume a large amount of stainless steel, copper, aluminum and other precious materials. Therefore, the development of non-chrome-nickel steel with very low temperature is of great significance. Ansteel’s working class, in keeping with Chairman Mao’s teaching of “breaking the framework of the world and following his own path of industrial development,” created 20 manganese-23-aluminum single-phase austenitic nonmagnetic steel with Chinese characteristics and worked closely with the relevant units Four times the welding vessel “native method” low temperature (-196 ℃) blasting experiment. Experiments show that: 20 manganese 23 aluminum good overall performance. Compared with stainless steel, its high strength, toughness, ductility and ductility, and workability, welding process and chromium-nickel austenitic stainless steel similar. The steel hot-rolled state to meet the requirements of -196 ℃ cryogenic steel, you can replace the chrome-nickel stainless steel, copper, aluminum for the manufacture of cryogenic vessel equipment. The steel is also suitable for making diamagnetic equipment.