【摘要】 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 ,增加其析出量更多还原

【Abstract】 The influence of Co on the microstructure of high Ni Co secondary hardening steel was studied by Mossbauer spectroscopy. The results showed that the configuration of Fe C 2Co, Fe 2Co in martensite is reduced with decreasing of Co content in steel; the distribution of alloying elements Ni, Cr, Mo is influenced by Co content in martensite; Co promotes the transformation of austenite to martensite during quenching, the amount of austenite is decreased with increasing of Co content in steel; Co promotes the formation of carbide during tempering, the quantity carbide increases with increasing of Co content in steel.更多还原