摘要
WC-Co nanocrystalline nitrogen-containing cemented carbides were prepared by vacuum sintering and low pressure sintering.The sintering processes of Cr_(2)(C,N)doped nano WC-Co powders were studied by using thermogravimetric analysis(TGA)and differential scanning calorimetry(DSC).The effect of sintering temperature on the microstructure and mechanical properties of nanocrystalline cemented carbide was studied by scanning electron microscope(SEM),high resolution transmission electron microscope(HRTEM)and mechanical property test.The results showed that the nano WC grains began to grow in the solid phase sintering stage.A high-performance nano-nitrogen-containing cemented carbide with uniform microstructure and good interfacial bonding can be obtained by increasing the sintering temperature to 1380℃.It has a transverse rupture strength(TRS)of 5057 MPa and a hardness of 1956 HV30.
作者
陈先富
刘颖
YE Jinwen
WANG Lu
CHEN Xianfu;LIU Ying;YE Jinwen;WANG Lu(School of Materials Science and Engineering,Sichuan University,Chengdu 610065,China;Key Laboratory of Advanced Special Ma-terial&Technology,Ministry of Education,Chengdu 610065,China)
基金
Funded by the National Key Research and Development Plan of China(No.2017YFB0305900)。
