真空感应熔炼4Cr5MoSiV1模具钢组织性能分析  

Analysis of Microstructure and Properties of Vacuum Induction Melting 4Cr5MoSiV1 Die Stee

作　　者：祝志超 张心金 朱琳 Zhu Zhichao;Zhang Xinjin;Zhu Lin

机构地区：[1]中国第一重型机械股份公司,黑龙江富拉尔基161042

出　　处：《一重技术》2022年第4期29-32,共4页CFHI Technology

基　　金：黑龙江省“百千万”工程科技重大专项(No.2019ZX10A02);国家重点研发计划(No.2018YFA0702905);黑龙江省“头雁”团队。

摘　　要：对真空感应炉冶炼4Cr5MoSiV1模具钢钢锭经锻压和热处理后的组织和性能进行分析。结果表明,锻后退火热处理后该模具钢硬度适中,粗加工性能优良。但该模具钢试样经调质热处理仍有部分碳化物呈链状分布在原奥氏体晶界上;另外,还存在一定程度的晶界显微偏析,导致冲击试样断口有明显的沿晶开裂特征,试样的冲击性能较低。This paper analyzes the microstructure and properties of the forged and heat treated 4Cr5MoSiV1 die steel ingot made by vacuum inducing furnace.The results show that the die steel has moderate hardness and excellent rough machining properties after forging and annealing.However,after quenching and tempering heat treatment,some chain-shaped carbides distribute are found on the boundary of the original austenite grain;In addition,grain boundary micro segregation is observed which leads to obvious intergranular craking on the fracture surface of the impact specimen,and the impact performance of the specimen is relatively low.

关 键 词：模具钢 调质热处理 晶界碳化物 沿晶开裂 

分 类 号：TG316[金属学及工艺—金属压力加工] TG156