圆锥齿轮断裂原因分析  

Analysis on Bevel Gear Fracture

作　　者：王春芬[1] 

机构地区：[1]洛阳船舶材料研究所,河南洛阳471039

出　　处：《热处理》2012年第1期79-81,共3页Heat Treatment

摘　　要：20Cr2Ni4A钢圆锥齿轮在使用中发生断齿。化学成分分析、力学性能检测、金相检验、断口分析和三维视频显微分析表明,齿的断裂系疲劳断裂,是由于齿轮锻造不良,导致残留铸造组织和力学性能降低,加之齿根机加工刀痕过深造成应力集中所致。Teeth of a bevel gear made of 20Cr2Ni4A steel fractured in service. Chemical analysis, mechanical property test, metallographic examination, fracture analysis, and 3d video microscopical analysis show that the fracture belongs to a fatigue fracture, and is caused by insufficient forging leading to residual of cast structure and decrease in mechanical properties, as well as excessively deep machining incision in the tooth-root producing stress concentration.

关 键 词：圆锥齿轮 疲劳断裂 铸造组织 力学性能 

分 类 号：TG115[金属学及工艺—物理冶金]