钢结硬质合金复合耐磨板组织性能研究  

Study on Microstructure and Properties of Steel Knot Cemented Carbide Composite Wear Resistant Plate

作　　者：石亚丽 黄智泉 陶文嘉 SHI Yali;HUANG Zhiquan;TAO Wenjia(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.;Luoyang Mining Machinery Engineering Design Institute Co.,Ltd.)

机构地区：[1]郑州机械研究所有限公司 [2]洛阳矿山机械工程设计研究院有限责任公司

出　　处：《现代矿业》2022年第10期203-207,212,共6页Modern Mining

摘　　要：采用真空烧结工艺制备了一种钢结硬质合金/Q235钢复合耐磨板,对复合板界面显微组织进行分析,测试复合板剪切强度与冲击韧性,并与堆焊耐磨板进行耐磨性对比。结果表明:钢结硬质合金与Q235钢界面存在宽度为140~160μm的互溶区,互溶区存在原子扩散现象,界面剪切强度为340~382 MPa,钢结硬质合金与基板之间形成冶金结合;复合耐磨板洛氏硬度为55~60 HRC,其耐磨性比堆焊耐磨板提高约18.6%,且复合板冲击功为7~10 J,可服役于冲击载荷下的恶劣磨损工况。A kind of steel knot cemented carbide/Q235 steel composite wear resistant plate was pre⁃pared by vacuum sintering process.The interface microstructure of the composite plate was analyzed.The shear strength and impact toughness of the composite plate were tested,and the wear resistance was com⁃pared with that of the surfacing wear resistant plate.The results showed that there is a mutual dissolution zone with a width of 140~160μm at the interface between steel knot cemented carbide and Q235 steel,and there is atomic diffusion in the mutual dissolution zone.The interfacial shear strength is 340~382 MPa,and a metallurgical bonding is formed between steel knot cemented carbide and substrate.The Rock⁃well hardness of the composite wear resistant plate is 55~60 HRC,and its wear resistance is about 18.6%higher than that of the surfacing wear resistant plate.The impact energy of the composite plate is 7~10 J,which can be used in the harsh wear conditions under impact load.

关 键 词：TiC钢结硬质合金 耐磨板 冶金结合 真空烧结 

分 类 号：TG135.5[一般工业技术—材料科学与工程]