汽车后摆臂锻造开裂成因及对策  

Causes and Countermeasures of Forging Cracks of Automobile Rear Arm

作　　者：刘磊 魏刚武 Liu Lei;Wei Gangwu(Special Steel Business Unit)

机构地区：[1]特钢事业部

出　　处：《南钢科技与管理》2018年第4期19-21,共3页NISCO Technology and Management

摘　　要：通过宏观分析、低倍检验与金相检验等方法,对汽车后摆臂锻造裂纹成因进行分析。结果表明:由于锻造工艺问题,该后摆臂在第二次切边时温度降低到800℃。温度过低,使得锻件表面处于塑性相对较低的偏析区域,在切边外力撕扯作用下开裂。This paper shows the analysis on the forging cracks of automobile rear arms by means of macroscopic analysis, macro test and metallographic inspection.The results showed that the temperature of the rear arm decreased to 800℃ at the second side cutting during the forging process.The segregation areas with relatively low plasticity on the forging piece surface cracked owing to the side cutting force and ultra-low temperature.

关 键 词：后摆臂 表面裂纹 低倍分析 显微组织 

分 类 号：TG146.16[一般工业技术—材料科学与工程]