30CrMnSiA钢缸底裂纹原因分析  

Analysis of Causes of Cracks at Bottom of 30CrMnSiA Steel Cylinder

作　　者：孟凡西 魏建华 马志全 姚松 侯荣强 潘慧超 杜学山[2] Meng Fanxi;Wei Jianhua;Ma Zhiquan;Yao Song;Hou Rongqiang;Pan Huichao;Du Xueshan(ZMJ Green Materials Technology Co.,Ltd.,Zhengzhou 450041,China;Zhengzhou University,Zhengzhou 450000,China)

机构地区：[1]郑州煤机格林材料科技有限公司,郑州450000 [2]郑州大学,郑州450000

出　　处：《煤矿机械》2025年第2期92-95,共4页Coal Mine Machinery

基　　金：河南省重点研发专项项目(241111221500)。

摘　　要：针对30CrMnSiA钢在淬火过程中出现的热处理裂纹,通过金相显微镜、扫描电镜、拉伸试验和冲击试验等方法对淬火裂纹进行探究。结果表明,30CrMnSiA钢缸底的裂纹为淬透性裂纹,主要原因为在热处理过程中缸底残余拉应力大于材料的抗拉强度,最终导致开裂。Aiming at the heat treatment crack of 30CrMnSiA steel during quenching process,the quenching crack was investigated by means of metallographic microscope,scanning electron microscope,tensile test and impact test.The results show that the crack of the 30CrMnSiA steel cylinder bottom are hardenability cracks.The main reason is that the residual tensile stress of the cylinder bottom exceeds the tensile strength of the material during the heat treatment process,and eventually leads to cracking.

关 键 词：缸底 淬火开裂 拉应力 热处理 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG115.5[金属学及工艺—金属学]