40CrNiMo齿轮材料点蚀破坏的金相研究  

METALLOGRAPHIC STUDY ON PITTING FAILURE OF GEAR MATERIAL 40CrNiMo

作　　者：徐继达[1] 杨宏伟[2] 胡文仪 

机构地区：[1]郑州大学材料工程学院,郑州450002 [2]郑州机械研究所,郑州450052

出　　处：《理化检验（物理分册）》2001年第9期380-383,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：用金相试验方法 ,对 4 0CrNiMo中等硬度齿轮材料在接触疲劳过程中的表面破坏形态、裂纹的萌生与扩展等问题进行了研究 ,并从金属学角度对材料失效破坏过程进行了分析。结果表明 ,经过一定周次的循环后 ,试验滚轮表面产生的接触疲劳破坏是属点蚀破坏 。By means of metallography, the paper studied the surface damage morphology, crack initiation, propagation and fracture of a 40CrNiMo gear. The failure mechanism of this material was discussed. The results showed that contact fatigue failure was due to pitting on the roller surface after certain test cycles, which was caused by plastic deformation on the surface and metal flow layer.

关 键 词：齿轮 接触疲劳 点蚀破坏 40CrNiMo 金相分析 

分 类 号：TG111.8[金属学及工艺—物理冶金] TH132.4[金属学及工艺—金属学]