Microstructure evolution behavior of high chromium heat-resistant steel during creep

doi:10.13251/j.issn.0254-6051.2021.06.029

Abstract

Abstract: According to the latest research results, the microstructure evolution behavior of high chromium heat-resistant steel during creep process was summarized and analyzed. Due to the coarsening of M₂₃C₆ carbide and Laves phase, the properties of high chromium heat-resistant steel decrease during long-term creep. The stability of high temperature structure can be improved by adjusting element content and improving heat treatment process. The formation of Z-phase is closely related to the consumption of MX-phase, and the nucleation mechanism of Z-phase is still not clear. Therefore, it can provide an effective way to improve the high temperature performance of high chromium heat-resistant steel by generating sufficient amount of MX carbonitrides and maintaining the stability during the long-term creep exposure.

Key words: high chromium heat resistant-steel, high temperature creep, strengthening mechanism, microstructure evolution

CLC Number:

TG142

Quan Chen, Liu Xinbao, Zhu Lin, Li Bo, Wang Ni. Microstructure evolution behavior of high chromium heat-resistant steel during creep[J]. Heat Treatment of Metals, 2021, 46(6): 135-145.

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