Cr12MoV钢冷冲模失效分析  

Failure analysis on Cr12MoV steel cold pouching die

作　　者：金燊超 赵先锐[1] 李妮[1] 戴晟[1] 张建宇 

机构地区：[1]台州学院物理与电子工程学院,浙江台州317000 [2]温岭市天工工量刃具科技服务中心有限公司,浙江温岭317527

出　　处：《金属热处理》2015年第7期189-193,共5页Heat Treatment of Metals

基　　金：浙江省科技计划(2013C31089)

摘　　要：Cr12MoV钢冷冲模凸模在制造过程中发生了断裂失效。采用直读光谱仪、金相显微镜、洛氏硬度计、体视显微镜和扫描电镜等方法对Cr12MoV钢冷冲模凸模的材料成分、显微组织、硬度和断口形貌等进行检验分析。结果表明,材料中存在严重的碳化物聚集和大块角状碳化物。原材料组织不均造成淬火组织应力过大,组织应力与随后磨削过程中产生的磨削残余应力综合作用,最终导致冷冲模开裂。The fracture occurred during the manufacturing process of the Cr12 MoV steel cold pounching die. The chemical composition,microstructure,hardness and fracture morphology of the Cr12MoV cold working die punch were investigated by means of direct reading spectrometer,metallographic microscope,Rockwell hardness tester,stereo microscope and scanning electron microscopy（ SEM）. The results show that there are gathered and arris-block in the steel. The inhomogeneous microstructure of the raw material causes too much structural stress after quenching,and the residual tensile stress caused by subsequent grinding together with the quenching structural stress lead to the cracking of cold pouching die.

关 键 词：CR12MOV钢 冷冲模 断裂失效 淬火 大块碳化物 

分 类 号：TG142.25[一般工业技术—材料科学与工程]