增压柴油发动机排气门盘部断裂分析  

Failure Analysis on the Exhaust-valve Skirt Used in Supercharge Diesel Engine

作　　者：权仁泽[1] 鹿云[1] 潘艳春[1] 

机构地区：[1]中国第一汽车集团公司技术中心材料部,吉林长春130011

出　　处：《金属热处理》2002年第2期46-47,共2页Heat Treatment of Metals

摘　　要：利用金相及扫描电镜对增压柴油机排气门盘部断裂原因进行了分析。分析结果表明 ,2 1 4N钢不适合做高热负荷发动机排气门材料 ;排气门的锻造流线必须符合气门外形轮廓 。Failure analysis on the exhaust valve skirt used in supercharge diesel engine was carried out through metallographic and SEM analysis.The results showed that steel 21 4N is not suitable as the exhaust valve material used in a high heat load engine,and the forging streamline of the exhaust valve should be accordant with the valve contour and without streamline fracture and large angle bending.

关 键 词：排气门材料 锻造流线 烧蚀 加工刀痕 柴油机 增压 

分 类 号：TK423.43[动力工程及工程热物理—动力机械及工程]