示波冲击试验评价正火12Cr1MoV钢回火脆化敏感性  

Evaluation of Temper Embrittlement in Nomalized Steel 12Cr1MoV by Instrumented Charpy Impact Testing

作　　者：孙树文[1,2] 雷廷权[1,2] 唐之秀 王欣[1,2] 犹公 陈家伦[1,2] 

机构地区：[1]哈尔滨工业大学 [2]哈尔滨锅炉有限责任公司

出　　处：《材料科学与工艺》1997年第2期33-39,共7页Materials Science and Technology

摘　　要：采用示波冲击试验及断口形貌分析技术，研究了正火１２Ｃｒ１ＭｏＶ钢回火试样的夏比冲击断裂过程及能量消耗，提出了采用裂纹扩展功与萌生功之比做为衡量回火脆化敏感性及一般材料韧脆断裂状态的性能指标，该指标与冲击断口形貌特征有较好的对应关系。文中还对正火１２Ｃｒ１ＭｏＶ钢的回火脆化敏感性进行了评价。The Charpy impact fracture process and the energy absorbed was studied by means of the instrumented impact test and fractographic analysis with normalized steel 12Cr1MoV subjected to different temper temperatures. A new criterion, the radio of the propagation energy (A k23 ) to the initiation energy (A k1 ), was given for evaluating temper embrittlement and the tendency of brittle to ductile fracture transition in general engineering materials. Trere is a good correlationship between the ratio of A k23 /A k1 and the fractographic characteristic. The sensitivity of temper embrittlement of normalized steel 12Cr1MoV was evaluated by the criterion.

关 键 词：回火 脆化敏感性 冲击试验 铬钢 

分 类 号：TG161.5[金属学及工艺—热处理]