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用穆斯堡尔谱研究了钴含量对高 Ni- Co二次硬化钢微结构的影响。发现 :随着钢中钴含量的减少 ,马氏体中的钴作为铁原子近邻的原子组态总量减少 ;钴在马氏体中的分布会影响镍、铬、钼原子在马氏体中的分布 ;钴促进奥氏体向马氏体转变 ,减少残余奥氏体量 ;钴促进合金碳化物的形成 ,增加其析出量
The influence of cobalt content on the microstructure of high Ni-Co secondary hardened steel was investigated by Mossbauer spectroscopy. It is found that with the decrease of cobalt content in steel, the total atomic configuration of cobalt in the martensite as the iron atom decreases; the distribution of cobalt in the martensite will affect the distribution of nickel, chromium and molybdenum atoms in the martensite Of the distribution; cobalt to promote the transformation of austenite to martensite, reducing the amount of retained austenite; cobalt to promote the formation of alloy carbides to increase the amount of precipitation