水电站水轮机涡壳由于机组容量逐渐增大,如采用低碳钢,板厚将越来越大,这对加工成型、现场焊接,都有很大困难。随着普通低合金钢的出现,40公斤级的15锰钒、15锰钛、16锰等普低钢涡壳,已在水电站广泛采用。14锰钼钒氮钢的塑性较好,有一定韧性,是我国目前生产的50公斤级普低钢中较好的钢种。鞍钢和哈尔滨电机厂于1971年曾 Due to the gradual increase of unit capacity, the turbine shell of hydropower station will have bigger and bigger plate thicknesses, such as using low-carbon steel, which is very difficult for forming and welding on site. With the emergence of ordinary low-alloy steel, 40 kg class of 15 manganese vanadium, 15 manganese, 16 manganese and other general-purpose low-steel volute, has been widely used in hydropower stations. 14 Manganese molybdenum vanadium nitrogen steel better plasticity, a certain toughness, is China’s current production of 50 kg class of low-grade steel in the better steel. Anshan Iron and Steel and Harbin Electric Works in 1971 had