微波烧结制备WC-TiC-Co硬质合金的组织和性能研究  

Study on Microstructure and Properties of WC-TiC-Co Cemented Carbide by Microwave Sintering

作　　者：罗军明[1,2] 廖佳[2] 陆磊[1] 徐吉林[2] 

机构地区：[1]江西省科学院江西省铜钨新材料重点实验室,南昌330029 [2]南昌航空大学材料科学与工程学院,南昌330063

出　　处：《材料导报》2013年第20期103-105,117,共4页Materials Reports

基　　金：江西省铜钨新材料重点实验室(2011-TW-08);江西省科技攻关项目(2011BBE50010)

摘　　要：以WC粉为基体,Co为粘结相,TiC颗粒为抑制剂,通过球磨、压制成型,微波烧结制备WC-TiC-Co硬质合金。结果表明,在1360℃微波烧结为液相烧结,Co与WC会发生反应生成η相(Co3W3C)。随TiC含量升高,合金的晶粒逐渐变得均匀细小,合金的相对密度、硬度和抗弯强度均先升高后下降,硬度在0.5%TiC时达到最高值,相对密度和抗弯强度在1.0%TiC时达到最高值。WC-TiC-Co cemented carbide are prepared by microwave sintering through ball milling, press for- ming and microwave sintering with WC powders as the matrix, Co particles as the binding phase, TiC particles as in- hi-bitors. The results show that it is a liquid phase sintering when the sintering temperature reaches to 1360℃, and chemical reactions between WC and Co generates new rj（Co3WaC） phase. With the increase of the TiC content, the crystal grain of the alloy gradually becomes uniform and fine, at the same time, the relative density, hardness and ben- ding strength of the cemented carbide all increase firstly, and then decease, the hardness reaches a maximum value at 0.5 TiC, the relative density and bending strength reach maximum values at 1.0% TiC.

关 键 词：TiC含量 微波烧结 WC-TiC-Co 硬质合金 

分 类 号：TF124.5[冶金工程—粉末冶金] TM154.3[冶金工程—冶金物理化学]