复合碳化物强化超细WC-Co硬质合金烧结工艺研究  

Study on Sintering Process of Ultrafine WC-Co Cemented Carbides Strengthened by Composite Carbides

作　　者：秦琴 张可 罗琳昆 彭一桐 鲁韩宇 米鑫 陈宇钦 QIN Qin;ZHANG Ke;LUO Lin-kun;PENG Yi-tong;LU Han-yu;MI Xin;CHEN Yu-qin(Institute of Intelligent Manufacturing,Chengdu Jincheng College,Chengdu 611731,China;School of Mechanical Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]成都锦城学院智能制造学院,四川成都611731 [2]成都大学机械工程学院,四川成都610106

出　　处：《稀有金属与硬质合金》2025年第1期112-118,共7页Rare Metals and Cemented Carbides

基　　金：四川省粉末冶金工程技术研究中心开放基金项目(SC-FMYJ2023-01)。

摘　　要：分别采用真空烧结和低压烧结工艺制备了复合碳化物强化超细WC-8Co和WC-6Co硬质合金,研究了烧结方式及烧结温度对合金性能及微观组织的影响。结果表明:与真空烧结合金相比,低压烧结合金具有更少的孔隙数量和更高的密度、硬度和抗弯强度;随着低压烧结温度的升高,合金的密度、硬度和抗弯强度均提高,但低压烧结温度过高会导致WC晶粒异常长大。Ultrafine WC-8Co and WC-6Co cemented carbides strengthened by composite carbides were prepared by vacuum sintering and low pressure sintering,respectively.The effects of sintering method and sintering temperature on the properties and microstructure of the cemented carbides were studied.The results show that compared with vacuum sintered cemented carbide,low pressure sintered cemented carbide has fewer pores with higher density,hardness and bending strength.With the increase of low pressure sintering temperature,all the density,hardness and flexure strength of the cemented carbide increase.However,excessively high temperature during low pressure sintering could lead to abnormal growth of WC grains.

关 键 词：超细WC-Co硬质合金 复合碳化物强化 真空烧结 低压烧结 烧结温度 微观组织 性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]