W+Co+C(碳黑)制备板状晶硬质合金及其性能研究  

Properties of Plate-like Grain Cemented Carbides Prepared from W+Co+C Base Mixed Powder

作　　者：雷纯鹏[1,2] 唐建成[1] 刘刚 吴爱华 

机构地区：[1]南昌大学,江西南昌330031 [2]南昌硬质合金有限责任公司,江西南昌330013 [3]江西耀升钨业股份有限公司,江西赣州341321

出　　处：《稀有金属材料与工程》2016年第12期3155-3159,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50801037;51071082;51271090;51364036);教育部博士学科点专项基金(20103601110001);教育部长江学者和创新团队发展计划(IRT0730);教育部新世纪优秀人才支持计划(NECT-10-0184);江西省高等学校科技落地计划(12056)

摘　　要：采用经球磨扁平化处理的W粉末为原料,添加适量Co、C(碳黑)、成型剂及纳米W粉制备板状晶硬质合金,研究了烧结温度、时间和添加纳米W粉,对板状晶硬质合金显微组织结构和性能的影响。结果表明,球磨预处理中颗粒W粉末可获得扁平化程度高的薄片状W粉末,以其为原料制备的WC-12%Co(质量分数)板状晶合金相对密度达97%,合金硬度呈现出明显的各向异性;添加纳米W粉或提高烧结温度、延长烧结时间,均有利于压坯烧结收缩致密化,生成更多的板状WC晶粒。The WC-12wt%Co plate-like grain cemented carbides were prepared from plate-like W＋Co＋C（carbon black） base mixed powders. Effects of addition of nanometer tungsten powders and sintering processes on the microstructures and properties of the plate-like grain cemented carbides were researched. Results show that the relative density of the WC-12wt%Co plate-like WC grain cemented carbides is of nearly complete densification, reaching 97%. The hardness of the alloys exhibits obvious anisotropy. Higher sintering temperature, longer sintering time or nanometer tungsten powders addition are favorable to sintering densification and the formation of more plate-like WC grains.

关 键 词：氧化钨 形貌结构 球磨 板状结构 

分 类 号：TG135.5[一般工业技术—材料科学与工程]