Research progress of chemical heat treatment of titanium alloys

doi:10.13251/j.issn.0254-6051.2022.08.042

Abstract

Abstract: Due to the dense passivation film, high oxygen affinity and low atomic diffusion coefficient of titanium alloy, the surface strengthening is difficult to achieve. However, the carbonitride and solid solution phase of titanium have excellent properties. The surface structure of titanium alloy can be greatly changed by four chemical heat treatment technologies, such as nitriding, carburizing, boronizing, and diffusion metallizing, and the surface hardness and strength are improved. The common technical characteristics, microstructure, strengthening mechanism and mechanical behavior of the titanium alloy chemical heat treatment were summarized, and the development prospect of chemical heat treatment in the future was forecasted.

Key words: titanium alloy, chemical heat treatment, gradient structure, hardness

CLC Number:

U671.6

Liu Gang, Liu Jing, Yang Feng, Xiang Qing. Research progress of chemical heat treatment of titanium alloys[J]. Heat Treatment of Metals, 2022, 47(8): 249-256.

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