灰铸铁贝氏体等温淬火研究  

Research of Austempering Heat Treatment for Gray Cast Iron

作　　者：汪振华[1] 尹志新[1] 刘志科[1] 尹秉升[1] 

机构地区：[1]广西大学机械工程学院,广西南宁530004

出　　处：《热加工工艺》2006年第2期40-41,共2页Hot Working Technology

摘　　要：研究了等温淬火热处理工艺对灰铸铁组织和性能的影响,并确定了860℃保温2h,然后在300℃保温1.5h的等温淬火工艺,在此工艺条件下可获得贝氏体基体的高性能灰铸铁。The effect of austempering heat treatment on microstructure and mechanical properties of gray cast iron were studied. The results show that lower bainite is obtained by austempering at 300℃ for 1.5h after 860℃ ×2h austeniziting, and the result of mechanical testing show that it can improve mechanical properties of gray cast iron.

关 键 词：等温淬火 灰铸铁 贝氏体 

分 类 号：TG156.3[金属学及工艺—热处理]