Influence of Size and Content on the Wear Resistance of Induction Brazing Diamond Coating in Air

doi:10.3901/JME.2023.12.225

Abstract

Abstract: Diamond is the hardest material in nature. Because of its good wear resistance, it is widely used in cutting, grinding and other industries. Using brazing technology to prepare diamond tools has unique advantages. The diamond content and particle size in the brazing coating are the key factors affecting the wear resistance of brazing diamond. Therefore, the effects of diamond size and content on the interface structure and wear resistance of induction brazing coating in air were studied, and their wear resistance mechanism was discussed. The results show that Cr element forms a width of 2 μm enrichment zone at the interface between diamond particles and Ni based solder alloy. When the addition of diamond reaches 15%, the proportion of Cr₇C₃ carbide in nickel base brazing coating reaches the maximum. Under the test conditions, the wear resistance of brazing coating with the fraction of diamond particles (210-280 μm) is better than that with particles (841/707 μm). With the increase of diamond content, the wear resistance of diamond brazing coating becomes better. When the diamond content is 20%, the wear resistance of coating is the best. When the diamond content exceeds 20%, the wear resistance decreases. During the wear process, diamonds are forms of integrity, passivation, cracking, breaking and falling off.

Key words: diamond, brazing coating, induction heating, wear resistance

CLC Number:

TH425

LONG Weimin, LIU Dashuang, WU Aiping, ZHONG Sujuan, WANG Decheng. Influence of Size and Content on the Wear Resistance of Induction Brazing Diamond Coating in Air[J]. Journal of Mechanical Engineering, 2023, 59(12): 225-235.

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