纳米复合抑制剂对微波法制备WC-TiC-Co硬质合金组成和微观结构的影响  

Effect of nano-composite grain inhibitors on composition and microtructure of WC-TiC-Co cemented carbide prepared by microwave method

作　　者：郑娟[1] 赵志伟[1] 刘晓芳 陈飞晓 杨宝震 ZHENG Juan;ZHAO Zhi-wei;LIU Xiao-fang;CHEN Fei-xiao;YANG Bao-zhen(Materials Science and Engineering,He＇ nan University of Technology,Zhengzhou 450001,China)

机构地区：[1]河南工业大学材料科学与工程学院

出　　处：《粉末冶金工业》2018年第4期21-25,共5页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(51304063);河南省高校科技创新人才资助项目(16HASTIT011)

摘　　要：以纳米WC、TiC和Co粉为原料,用纳米V_8C_7-Cr_3C_2复合粉末作为晶粒抑制剂,研究了复合晶粒抑制剂对硬质合金的组成和微观结构的影响。结果表明：由微波原位合成的纳米V_8C_7-Cr_3C_2复合粉末显示出良好的分散性,主要由平均尺寸约30 nm的球形或类球形颗粒组成。WC基复合粉末经微波烧结后,主要由WC和TiC组成,并且WC衍射峰强度明显减弱。添加纳米复合晶粒抑制剂后,硬质相的分布较均匀,平均晶粒尺寸在500 nm左右。The effect of composite grain inhibitor on the composition and microstructure of cemented carbide was studied by using nano WC,TiC and Co powder as raw materials and nano V_8C_7-Cr_3C_2 composite powder as grain inhibitor. The results show that the nano V_8C_7-Cr_3C_2 composite powder synthesized by microwave in-situ exhibits good dispersity and consists mainly of spherical or quasi-spherical particles with an average size of about 30 nm.After microwave sintering,WC-based composite powder is mainly composed of WC and TiC,and the diffraction peak intensity of WC is obviously weakened. After adding nano-composite grain inhibitor,the distribution of hard phase is uniform and the average grain size is about 500 nm.

关 键 词：晶粒抑制剂 纳米硬质合金 微波烧结 显微结构 

分 类 号：TG135.5[一般工业技术—材料科学与工程]