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Study on Sintering Densification Process of (Ti,W,Mo,Ta,Nb,Zr)(C,N)-(CO,Ni) cermet
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1.College of Materials Science and Engineering,Fuzhou University;2.College of Materials Science and Engineering,Fujian University of Technology

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    Abstract:

    In this paper, the sintering densification process of (Ti,W,Mo,Ta, Nb,Zr)(C,N)-(Co,Ni) based cermet was studied. The effects of sintering process on composition, microstructure and properties were discussed. The results show that during the densification process of (Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni) based cermets, the mass loss caused by sintering basically ends at the solid phase sintering stage. When the sintering temperature is above 1340℃, the volume shrinkage and density of the alloy increase sharply due to the appearance of liquid phase. The change of nitrogen content in cermet during the sintering process is consistent with the change of magnetic properties of the alloy, and the nitrogen content has a significant effect on the formation of solid solution. When the sintering temperature is 1490 ℃, the comprehensive mechanical properties of (Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni) cermets are the best, and the strength and toughness of the cermets can be further improved by the appropriate control of N2 partial pressure at sintering temperature.

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[Xiang Zhongnan, Li Zhanjiang, Chang Fa, Dai Pinqiang. Study on Sintering Densification Process of (Ti, W,Mo, Ta, Nb, Zr)(C, N)-(CO, Ni) cermet[J]. Rare Metal Materials and Engineering,2020,49(10):3562~3568.]
DOI:10.12442/j. issn.1002-185X.20190909

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History
  • Received:November 03,2019
  • Revised:November 28,2019
  • Adopted:December 04,2019
  • Online: November 04,2020
  • Published: