某曲轴堆焊模具的失效分析  

Failure Analysis on Crankshaft Surfacing Die

作　　者：丁永峰[1] 徐戊矫[1] 雷帆[1] 谭疆利 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《热加工工艺》2013年第23期207-208,共2页Hot Working Technology

摘　　要：采用化学成分检测、显微硬度、金相及SEM扫描分析等手段,对某曲轴堆焊模具进行了失效分析。结果表明,锻模的主要失效形式为疲劳磨损,并在其型腔表面有大量疲劳裂纹。堆焊层材料中硫元素的含量高于标称值,热处理过程中应合理控制回火时间。The chemical composition, metallurgical properties inspection and scanning electron microscopy observation were conducted to analyze the failed crankshai~ surfacing die. The results indicate that the fatigue wear is the main failure mode. The fatigue cracks are found on the surface of the cavity. The sulfur content is higher than the nominal composition in the surthcing layer material. The proper tempering time should be controlled during heat treatment.

关 键 词：堆焊模具 失效 疲劳磨损 热处理 

分 类 号：TG315.2[金属学及工艺—金属压力加工]