真空熔结钢结硬质合金/Q235钢界面组织性能研究  

Interfacial microstructure and properties of steel bonded cemented carbide/Q235 steel by vacuum fusion

作　　者：石亚丽 黄智泉 魏炜 李恒 高站起 张永生 SHI Yali;HUANG Zhiquan;WEI Wei;LI Heng;GAO Zhanqi;ZHANG Yongsheng(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州机械研究所有限公司,郑州450001

出　　处：《粉末冶金技术》2023年第2期116-124,共9页Powder Metallurgy Technology

基　　金：新型钢结硬质合金耐磨复合材料制备关键技术研发(222102230038)。

摘　　要：采用真空熔结工艺制备了TiC钢结硬质合金/Q235钢复合板,研究了复合板界面显微组织和力学性能。结果表明:钢结硬质合金与Q235钢基体之间形成了一定宽度的互溶区,互溶区宽度主要取决于熔结温度和熔结时间。Mn、Ni、Mo元素由钢结硬质合金经互溶区向基体中扩散,Fe元素由基体通过互溶区向钢结硬质合金扩散。互溶区是材料显微组织、化学成分及显微硬度变化的过渡区。复合板界面剪切强度为176~245 MPa,表明钢结硬质合金与Q235钢基体之间形成冶金结合。The composite plates of TiC-based steel bonded cemented carbides and Q235 steels were prepared by vacuum fusion.The interfacial microstructure and mechanical properties of the composite plates were investigated.The results show that,there is a certain width mutual dissolution zone between the steel bonded cemented carbides and Q235 steel matrix,and the width of the mutual dissolution zone depends on the fusion temperature and fusion time.Mn,Ni,and Mo elements diffuse from the steel bonded cemented carbides to the matrix through the mutual dissolution zone,and Fe element diffuses from the matrix to the steel bonded cemented carbides through the mutual dissolution zone.The mutual dissolution zone is the transition zone of microstructure,chemical composition,and microhardness.The shear strength of the composite plate interface is 176~245 MPa,indicating that the metallurgical bonding between the steel bonded cemented carbides and Q235 steels matrix is formed.

关 键 词：真空熔结 TiC钢结硬质合金 界面组织 冶金结合 

分 类 号：TG174.4[金属学及工艺—金属表面处理]