高铬耐热钢蠕变过程中的组织演化行为

doi:10.13251/j.issn.0254-6051.2021.06.029

摘要/Abstract

摘要： 结合国内外对高铬耐热钢的最新研究成果,从强化机制出发,总结分析了高铬耐热钢在蠕变过程中微观组织的演化行为。长时蠕变过程中由于M₂₃C₆碳化物和Laves相的粗化,高铬耐热钢性能下降,通过调整元素含量及改进热处理工艺可提高高温组织的稳定性。Z相的形成与MX相的消耗密切相关,目前对于Z相的成核机理尚不能达成一致,因此生成足够量的MX碳氮化物并保持高温长时作用下组织的稳定性是提高高铬耐热钢高温性能的有效途径。

关键词: 高铬耐热钢, 高温蠕变, 强化机制, 微观组织演化

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

中图分类号:

TG142

权晨, 刘新宝, 朱麟, 李博, 王妮. 高铬耐热钢蠕变过程中的组织演化行为[J]. 金属热处理, 2021, 46(6): 135-145.

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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