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VACUUM ›› 2025, Vol. 62 ›› Issue (6): 106-111.doi: 10.13385/j.cnki.vacuum.2025.06.14

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Preparation and Performance Study of Hard Alloy with Additive Forming Phase

MAO Haina, CHAI Jun, LU Bin, WANG Yunxiang, YAO Lixue   

  1. Jinchuan Group Co., Ltd., Jinchang 737100, China
  • Received:2024-06-04 Online:2025-11-25 Published:2025-11-27

Abstract: The effects of additives on the micro structure evolution and mechanical properties of cemented carbide were investigated. Tungsten cobalt alloy was used as matrix, titanium carbide and other auxiliary materials were added, and the cemented carbide samples with different TiC content were prepared by granulation, pressing and sintering. The microstructure, coercive force and bending strength of the alloy were analyzed in detail by scanning electron microscope, hysteresis loop measuring instrument and three-point bending tester. The results show that the addition of additives significantly changes the microstructure of hard alloys. With the increase of additive content, the grain size of the alloy gradually refines and the distribution becomes more uniform. The coercivity of alloy specimen with 15 wt% TiC reaches maximum value of 5.8 kA·m-1, while the bending strength of alloy specimen with 20 wt% FiC is the highest at the same sintering temperature, reaching 840 MPa. The additive content has a significant control effect on the micro structure and mechanical properties of cemented carbide, and the additive content has a positive correlation with the bending strength of the alloy. By optimizing the content of additives, the comprehensive performance of hard alloys can be effectively improved.

Key words: additive, hard alloy, titanium carbide, alloy preparation, performance analysis

CLC Number:  TF125.3

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