20Cr2Ni4A齿轮轴淬火开裂失效分析  

Failure Analysis of Quench-cracking for 20Cr2Ni4A Gear Axle

作　　者：明正兴[1,2] 梁益龙[1,2] 梁宇[1,2] 孙中源[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003 [2]贵州省材料结构与强度重点实验室,贵州贵阳550003

出　　处：《热加工工艺》2012年第8期227-229,共3页Hot Working Technology

基　　金：贵阳市科技计划项目([2011101]1-29号)

摘　　要：对某淬火开裂20Cr2Ni4A齿轮轴进行了金相显微组织、显微硬度、表层残余奥氏体等方面的检测分析。结果显示,齿轮轴表面晶粒相对粗大,渗层内氧化,残余奥氏体含量高;在淬火应力的作用下,造成齿轮轴表面开裂,导致该轴淬火开裂失效。The causes of quench-cracking of 20Cr2Ni4A gear axle were analyzed by the analysis of retained austenite, microstructure and microhardness testing. The results show that the surface layer coarse grain, internal oxidation and high content of residual austenite are the primary reasons of quench-cracking of 20Cr2Ni4A gear axle.

关 键 词：失效分析 20Cr2Ni4A齿轮轴 淬火开裂 

分 类 号：TG156.7[金属学及工艺—热处理]