20CrMnMo钢渗碳重载齿轮表面裂纹分析  

Analysis on surface crack of 20CrMnMo carburized heavy-duty gear steel

作　　者：黄福祥[1] 程里[1] 唐丽文[1] 杨惠[1] 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400050

出　　处：《金属热处理》2010年第9期104-107,共4页Heat Treatment of Metals

摘　　要：利用金相显微镜及扫描电子显微镜(SEM)等方法对20CrMnMo钢渗碳重载齿轮表面裂纹进行了分析,查找其裂纹起裂原因。结果表明,齿轮钢热处理不当造成其显微组织粗大是齿轮产生脆性沿晶开裂的主要原因。The reason of cracking on surface of 20CrMnMo carburized heavy-duty gear was analyzed by SEM and optical metalloscope.The failure mechanism was also discussed.The results show that the microstructure of the quenched steel is coarse acicular martensite,which resulted in brittle fracture of the gear with intergranular cracking.

关 键 词：20CrMnMo 渗碳重载齿轮 表面裂纹 针状马氏体 

分 类 号：TG156.8[金属学及工艺—热处理]