径向复合钨合金杆的气体渗碳及力学性能  

Gas carburization and mechanical properties of radial composite tungsten alloy rods

作　　者：李博 王猛[1] 杨明川[1] 罗荣梅[1] 吴海龙 杜忠华 LI Bo;WANG Meng;YANG Mingchuan;LUO Rongmei;WU Hailong;DU Zhonghua(College of Equipment Engineering,Shenyang Ligong University,Shenyang 110159,China;College of Mechanical Engineering,Nanjing University of Science and Techology,Nanjing 210094,China)

机构地区：[1]沈阳理工大学装备工程学院,沈阳110159 [2]南京理工大学机械工程学院,南京210094

出　　处：《粉末冶金材料科学与工程》2024年第3期201-209,共9页Materials Science and Engineering of Powder Metallurgy

基　　金：辽宁省教育厅兴辽英才计划项目(XLYC2202021)。

摘　　要：利用气体渗碳法对一种径向复合钨合金杆进行表面热处理,在其表面获得一定厚度的渗碳层,采用扫描电镜、X射线衍射仪、纳米压痕仪以及室温静态压缩实验,研究渗碳温度和渗碳时间对合金显微组织和力学性能的影响。结果表明:在1150~1250℃范围内,随渗碳温度升高和渗碳时间延长,渗碳层厚度明显增加,WC相充分形成;当渗碳温度为1200℃,渗碳时间为3~5 h时,合金的渗碳层厚度可达70.5~94.1μm,维氏硬度达到599.6~1128.6。渗碳后的径向复合钨合金杆在室温压缩过程中保持良好的压缩韧性,当渗碳层较厚时,外层材料W70Cu发生明显的剪切失效。The surface heat treatment of a radial composite tungsten alloy rod was carried out by gas carburization method,and a carburized layer with a certain thickness was obtained on the surface.The effects of carburizing temperature and time on the microstructure and mechanical properties of the alloy were studied by scanning electron microscopy,X-ray diffraction,nanoindentation,and room temperature static compression experiments.The results show that in the range of 1150-1250℃,with the increase of carburizing temperature and time,the thickness of carburized layer increases obviously,and WC phase is fully formed.When the carburizing temperature is 1200℃and the carburizing time is 3-5 h,the thickness of the carburized layer of the alloy can reach 70.5-94.1μm,and the Vickers hardness reaches 599.6-1128.6.After carburization the radial composite tungsten alloy rod maintains good compressive toughness during compression at room temperature.When the carburized layer is thick,the outer material W70Cu undergoes obvious shear failure.

关 键 词：气体渗碳 钨合金 显微组织 静态压缩 剪切失效 

分 类 号：TG156.8[金属学及工艺—热处理]