曲轴用42CrMo4钢表面裂纹成因分析  

Cause Analysis of Surface Crack of 42CrMo4 Forgings for Crankshaft

作　　者：信世奇 朱林林 刘金池 张刚 王忠辉 Xin Shiqi;Zhu Linlin;Liu Jinchi;Zhang Gang;Wang Zhonghui(Xiwang Special Steel Co Ltd,Binzhou,Shandong 256200)

机构地区：[1]西王特钢有限公司技术中心,山东滨州256200

出　　处：《特钢技术》2020年第3期24-26,共3页Special Steel Technology

摘　　要：针对模铸锻材42CrMo4表面出现裂纹缺陷,通过对锻材表面裂纹进行试验分析,结果表明,裂纹表面有平面等轴晶粒的多边形轮廓形态,具有锻造开裂后又发生高温再结晶的形貌特征,进而推断出锻材上的裂纹形成于高温锻造变形过程中。In view of the crack defect on the surface of die cast forging 42CrMo4,through the test and analysis of the surface crack of forgings,the results show that there are polygonal contour shape of plane equiaxed grain on the surface of the crack,which has the morphological characteristics of high temperature recrystallization after forging crack,and it is concluded that that the crack on the forgings is formed in the process of high temperature forging deformation.

关 键 词：42CrMo4 锻材 裂纹 高温锻造。 

分 类 号：TG142.33[一般工业技术—材料科学与工程]