内燃机21-4N钢排气门热过载疲劳失效  

21-4N Steel Exhaust Valve Fatigue Fracture Caused by Thermal Overstress

作　　者：颜钟得[1] 谢光荣[1] 吴健[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《机电工程技术》2006年第12期74-76,共3页Mechanical & Electrical Engineering Technology

摘　　要：本文介绍了气门的工作条件、正常失效及21-4N钢排气门强化热处理与层状析出的关系,分析了层状组织对其性能影响和21-4N钢排气门过载“断头”失效的原因。The valve work condition and normal failure are studied in this paper. The heat treatment of 21-4N steel exhaust valve is related to the samdwich separated out. The samdwich affects the valve capability 21-4N steel exhaust valve fatigue fracture is caused by thermal overstress.

关 键 词：气门 失效 层状析出 晶界 疲劳失效 

分 类 号：TK407[动力工程及工程热物理—动力机械及工程]