东风EQ-140后桥主动齿轮淬火开裂分析  

Analysis on Quenching Crack of Driving Gear in Dongfeng EQ-140 Rear Axle

作　　者：何玉林[1] 姚年春[1] 

机构地区：[1]江苏财经职业技术学院机械与电子工程系,江苏淮安223003

出　　处：《铸造技术》2015年第2期349-351,共3页Foundry Technology

摘　　要：对材质为22CrMoH的东风EQ-140开裂齿轮的宏观形貌、化学成分和微观组织等进行检测与观察,分析其断裂原因。结果表明,提高回火温度,延长回火保温时间仍有开裂现象,齿轮淬火开裂的主要原因是由于带状组织超差形成的。The fracture reasons Of driving gear in Dongfeng EQ-140 rear axle were analyzed by macrostructure, microstrueture and chemical composition. The results show that the main reason for the cracking is banded structure out of tolerance, and there are still any cracking after lengthen tempering holding times and increasing tempering temperature.

关 键 词：齿轮 淬火开裂 带状组织 

分 类 号：TG156.35[金属学及工艺—热处理]