Effect of Sintering Temperature on the Microstructure and Mechanical Properties of Nanocrystalline Cemented Carbide

被引：3
作者：
Chen, Xianfu [1 ,2 ]
Liu, Ying [1 ,2 ]
Ye, Jinwen [1 ,2 ]
Wang, Lu [1 ,2 ]
机构：
[1] Sichuan Univ, Sch Mat Sci & Engn, Chengdu 610065, Peoples R China
[2] Minist Educ, Key Lab Adv Special Mat &Technol, Chengdu 610065, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2024年 / 39卷 / 03期
关键词：
nano nitrogen cemented carbide; sintering temperature; microstructure; mechanical properties; WC-CO; TUNGSTEN CARBIDE; GRAIN-BOUNDARIES; CR3C2; WC/CO; VC; SEGREGATION; INTERFACES; BEHAVIOR; CR;
D O I：
10.1007/s11595-024-2924-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
WC-Co nanocrystalline nitrogen-containing cemented carbides were prepared by vacuum sintering and low pressure sintering. The sintering processes of Cr2(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 1 380 degrees C. It has a transverse rupture strength (TRS) of 5 057 MPa and a hardness of 1 956 HV30.
引用
收藏
页码：664 / 672
页数：9
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