Microstructure, wear and corrosion resistant properties of TA2 titanium alloy after vacuum induction carbonitriding

doi:10.13251/j.issn.0254-6051.2022.02.018

Abstract

Abstract: Pure titanium alloy (TA2) was modified by vacuum induction carbonitriding at 900 ℃, and the microstructure, wear and corrosion resistance properties of the surface strengthening layer of TA2 titanium alloy after carbonitriding were studied. The results show that a composite layer of C_0.3N_0.7Ti is formed on the surface of TA2 titanium alloy after carbonitriding at 900 ℃, the microhardness of the surface layer is as high as 2236 HV0.25, which is about 4.4 times higher than that of the specimen without carbonitriding. After carbonitriding, the specimen shows typical mild oxidation wear characteristics. In addition, in simulated body fluid (SBF) solution, corrosion potential of the TA2 titanium alloy after carbonitriding moves forward, the self-corrosion current density decreases obviously and the corrosion resistance improves.

Key words: TA2 titanium alloy, vacuum induction carbonitriding, microstructure, dry friction, electrochemical corrosion

CLC Number:

TG178

Xiang Qing, Jiang Xueting, Wu Liangyin, Ran Xiaoxiao, Liu Jing, Yang Feng. Microstructure, wear and corrosion resistant properties of TA2 titanium alloy after vacuum induction carbonitriding[J]. Heat Treatment of Metals, 2022, 47(2): 99-104.

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