摘要
研究了Fe-Cr-Ni-Co-Mo马氏体时效不锈钢固溶处理温度与奥氏体形成过程,马氏体相变后的残余奥氏体,以及500℃时效形成逆转变奥氏体之间的关系,并探索了其对力学性能,尤其是低温韧性的影响。结果表明:低温固溶处理形成的马氏体具有较高的时效强化效应,残余奥氏体和时效形成的逆转变奥氏体显著改善低温韧性,这使得Fe-Cr-Ni-Co-Mo马氏体时效不锈钢低温固溶处理后既有较高的强度,又有较高的低温冲击韧度。
The relations between solution treatment temperature and the formation of austenite, the retained austenite formed during martensitic transformation and the reversed austenite formed due to aging at 500 ℃ of a maraging stainless steel of the Fe-Cr-Ni-Co-Mo system were investigated, and its effect on mechanical properties, especially on the impact toughness at cryogenic temperatures was discussed. The results show that the martensite obtained by low temperature solution treatment has a better age-hardening effect and that the presence of retained austenite and reversed austenite formed during aging improves the impact toughness at cryogenic temperatures significantly. Thus, the maraging stainless steel of the Fe-Cr-Ni-Co-Mo system possesses higher strength and higher impact toughness at cryogenic temperatures after low temperature solution treatment.
出处
《热加工工艺》
CSCD
北大核心
2012年第24期227-229,233,共4页
Hot Working Technology
