摘要
以WC、(W,Ti)C和Ni粉末为主要原料,采用冷压?真空烧结法,制备WC-TiC-Ni硬质合金,研究Mo、Co等合金化元素的添加对合金显微组织力学性能的影响。采用扫描电子显微镜、三点抗弯曲、洛氏硬度等测试手段对烧结坯体致密化过程、显微组织演变及材料力学性能等进行表征。结果表明,通过技术控制,可制备出高致密度、良好力学性能的以Ni为粘结相的硬质合金材料。在此基础上,针对WC-6.5(W,Ti)C-10.0Ni,加入1.0%Mo进行合金化,在保持抗弯强度相当的基础上,可以使合金硬度由88.2HRA提高至88.4HRA;添加1.0%Co,可以同时提高合金的硬度和抗弯强度,合金硬度和强度分别达到88.6HRA和1656.7MPa。
WC-TiC-Ni cemented carbide was prepared by mixed WC,（W,Ti）C and Ni powders through cold pressing and vacuum sintering.The influences of Mo and Co on the mechanical properties of WC-TiC-Ni cemented carbide were investigated.The densification process,microstructure evolution and microstructure and mechanical properties of the sintered alloys were characterized by SEM,three-point bending,HRA,etc.The results show that by controlling technological parameters,Ni-bonded cemented carbide with high density and good mechanical properties can be prepared.WC-6.5（W,Ti）C-10.0Ni cemented carbide with adding 1.0%Mo can improve the hardness from 88.2HRA to 88.4HRA while the transverse rupture strength remains unchanged;The hardness and the transverse rupture strength of the WC-6.5（W,Ti）C-10.0Ni cemented carbide increase to 88.6HRA and 1 656.7 MPa respectively with adding 1.0%Co.
出处
《粉末冶金材料科学与工程》
EI
2011年第2期303-308,共6页
Materials Science and Engineering of Powder Metallurgy
基金
国家杰出青年科学基金资助项目(50825102)
国家自然科学基金专项基金资助项目(50823006
2009.1-2012.12)
国家自然科学基金委创新团队项目(50721003)
