碳化烧结一步法制备WC-10Co硬质合金的摩擦磨损性能  

Friction and Wear Properties of WC-10Co Cemented Carbide Prepared by One-step Carbonization-Sintering Method

作　　者：靳磊 臧传君 鲍贤勇 鲁忠臣[2] 张峰 曾美琴[3] JIN Lei;ZANG Chuan-jun;BAO Xian-yong;LU Zhong-chen;ZHANG Feng;ZENG Mei-qin(Fiyta Precision Technology Co.,Ltd.,Shenzhen 518057,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]飞亚达精密科技股份有限公司,广东深圳518057 [2]华南理工大学机械与汽车工程学院,广东广州510640 [3]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《稀有金属与硬质合金》2022年第2期85-90,共6页Rare Metals and Cemented Carbides

基　　金：广东省自然科学基金项目(2020A1515011548);飞亚达-华工大材料联合实验室项目。

摘　　要：以W、C、Co、VC、Cr_(3)C_(2)为原料,按照WC-10Co-0.9VC-0.3Cr_(3)C_(2)进行配料,采用等离子球磨和碳化烧结一步法制备了WC-10Co硬质合金。试验结果表明,WC-10Co硬质合金平均晶粒度为0.25μm,致密度为99.2%,硬度为92.3 HRA。WC-10Co硬质合金摩擦系数随着载荷的增加而减小,平均摩擦系数在0.48~0.57之间。与商用YG8硬质合金相比,通过碳化烧结一步法制备的WC-10Co合金具有更短的“跑和期”,更低的摩擦系数以及更高的耐磨损性能。模拟结果表明,碳化烧结一步法所制备的WC-10Co合金亚表层受磨球影响引起的Hamilton最大接触应力为1 563.9 MPa,远低于商用YG8硬质合金的1 847.1 MPa。Using W,C,Co, VC and Cr_(3)C_(2)as raw materials, and compounding them according to WC-10 Co-0.9 VC-0.3 Cr_(3)C_(2),WC-10 Co cemented carbide was prepared by plasma ball milling and one-step carbonization-sintering method.The test results show that the average grain size of WC-10 Co cemented carbide is 0.25 μm, the density is 99.2% and the hardness is 92.3 HRA.The friction coefficient of WC-10 Co cemented carbide decreases with the increase of load, and the average friction coefficient is within 0.48~0.57.Compared with commercial YG8 cemented carbide, WC-10 Co cemented carbide prepared by one-step carbonization-sintering method has shorter running time, lower friction coefficient and higher wear resistance.The simulation results show that the maximum Hamilton contact stress caused by grinding ball effect on the subsurface of the WC-10 Co cemented carbide prepared by one-step carbonization-sintering method is 1 563.9 MPa, which is far lower than 1 847.1 MPa of the commercial YG8 cemented carbide.

关 键 词：等离子体球磨 碳化烧结 WC-10Co 硬质合金 摩擦磨损 

分 类 号：TG135.5[一般工业技术—材料科学与工程]