烧结温度对Ti-Al金属间化合物黏结剂金刚石磨块力学性能和磨削性能的影响

doi:10.19976/j.cnki.43-1448/TF.2023032

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Abstract Diamond grinding wheels with intermetallic compound as binder are widely used in grinding sapphire, silicon carbide and other fields. The binding state between binder and diamond directly affects the mechanical and grinding properties of the diamond grinding wheels. In order to study the interface binding of binder and diamond, Ti-Al intermetallic-bonded diamond grinding blocks were prepared by hot pressing, and the binding state and the grinding property of grinding blocks were studied by various material characterization methods and friction wear tests. The results show that Ti-Al intermetallic compound is generated in the binder after hot pressing, and Al will be enriched on the diamond surface to improve the holding force of the binder on the diamond particles. When the sintering temperature is 900 ℃, the binder has the highest holding force on diamond particles, and the mechanical and grinding properties of the grinding block are the best, the maximum strength and hardness (HRB) are 160.48 MPa and 114.4, respectively, and the abrasion radio of grinding sapphire is 22.3 and the surface roughness of sapphire is 1.37 µm. However, the excessive oxidation of the binder will reduce the grinding property of the grinding block with the further increase of the temperature.

Key words： Ti-Al intermetallic compound binder diamond grinding block mechanical property grinding property

Received: 29 March 2023 Published: 06 July 2023

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	TANG Zhou
	HE Yuehui
	CHEN Shuaipeng

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TANG Zhou,HE Yuehui,CHEN Shuaipeng. Effects of sintering temperature on mechanical and grinding properties of Ti-Al intermetallic-bonded diamond grinding block[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(3): 288-295.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023032 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I3/288

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