Ti(C<sub>0.7</sub>N<sub>0.3</sub>)对(Ti,W,Ta)C-Mo-Ni系金属陶瓷组织与性能的影响

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Abstract The Ti(C,N)-based cermet materials were prepared by powder metallurgy using (Ti,W,Ta) C and Ti(C_0.7N_0.3) as hard phase materials. The effect of Ti(C_0.7N_0.3) additions on the microstructures and properties of (Ti,W,Ta)C-Mo-Ni cermets has been studied. The results indicate that the microstructure of (Ti,W,Ta)C-Mo-Ni cermets consist of black core-grey rim structure and white core-grey rim structure. The black cores is Ti(C_0.7N_0.3) particle and the white cores is (Ti,W,Ta)C particles. With increasing Ti(C_0.7N_0.3) addition, black cores increase and the rims become thinner. Adding Ti (C_0.7N_0.3) solid solution has little effect on the hardness of (Ti,W,Ta)C-Mo-Ni cermets, while the bending strength increases first and then decreases with the increase of Ti(C_0.7N_0.3). When the Ti(C_0.7N_0.3) content is 40%, the optimal properties of (Ti,W,Ta)C-Ti(C_0.7N_0.3)-Mo-Ni cermets is obtained, the hardness (HRA) is 90.3 and the bending strength is 1 748 MPa, respectively.

Key words： cermet solid solution microstructures annular phase hardness bending strength

Received: 23 September 2019 Published: 19 June 2020

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	LIN Shaojiang
	CHEN Xiao
	XIONG Weihao

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LIN Shaojiang,CHEN Xiao,XIONG Weihao. Effects of Ti(C_0.7N_0.3) addition on the microstructure and properties of (Ti,W,Ta)C-Mo-Ni cermets[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(1): 11-15.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I1/11

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