耐海水腐蚀低合金钢Ca处理的冶金质量及对钢性能的影响

• 作 者: 李大经 高海潮 汤曙光 潘健武 金基福
• 机 构: 马鞍山钢铁学院,上海钢铁研究所,
• 出 处: 特殊钢
• 发表日期: 1982年05期
• 关键词: 耐海水腐蚀 Ca 石墨钢轧辊 钢性能 冶金质量 铁液 喷吹 硫化物夹杂 试验研究 纯净钢

导言早在本世纪初期就有人提出CaSi作为钢的纯净剂。三十年代曾单独用Ca作了钢液的脱氧试验。其后,陆续报导了同时用Al和CaSi脱氧,能降低有害的Ⅱ型硫化物和氧化铝夹杂物,使铸钢的塑性、韧性、热轧脆性得以改善。至六十年代前后,已实际用Ca作了处理铸铁,Ca石墨钢轧辊和Ca易削钢等试验①。但是,长期以来,由于Ca在铁液中的溶解度小(1880~0 K、0.032%)、Ca的沸点(1 784~0K)比铁的熔点低,在炼钢

Introduction As early as the beginning of this century, CaSi was proposed as a purer for steel. In the thirties, Ca alone was used to deoxidize molten steel. Subsequently, it was reported successively that deoxidation of both Al and CaSi at the same time can reduce the harmful type II sulfide and alumina inclusions so that the plasticity, toughness and hot brittleness of the cast steel can be improved. By the 1960s, Ca had been actually used to treat cast iron, Ca graphite steel roll and Ca free-cutting steel test ①. However, since the solubility of Ca in molten iron is small (1880-0K, 0.032%) for a long time, the boiling point of Ca (1784-0K) is lower than the melting point of iron