HR3C钢管高温服役脆化行为特征及预防泄漏措施

doi:10.13251/j.issn.0254-6051.2020.11.006

摘要/Abstract

摘要： HR3C钢管因具有优良的抗蒸汽氧化性能广泛应用于566、600及620 ℃等级超/超超临界机组,但是其在高温时效过程中表现出明显的脆化现象,严重影响机组安全稳定运行。结合脆化失效案例的典型特征对HR3C钢管在高温时效和服役态下的脆化现象、脆化机理、脆化防治进行了系统的分析,提出了针对脆化HR3C钢管泄漏的预防性措施。最后指出了HR3C钢的应用困境和面临的挑战。

关键词: HR3C钢管, 奥氏体耐热钢, 时效脆化, 行为特征, M₂₃C₆, 失效

Abstract: HR3C steel pipe is widely used in 566, 600 and 620 ℃ super/ultra supercritical pressure units because of its excellent resistance to steam oxidation, but it shows obvious embrittlement phenomenon in the process of high temperature aging, which seriously affects the safety and stable operation of the unit. Based on the typical characteristics of embrittlement failure cases, the embrittlement phenomenon, embrittlement mechanism and embrittlement prevention of HR3C steel pipe under high temperature aging and service state were systematically analyzed, and the preventive measures for the leakage of brittle HR3C steel pipe were put forward. Finally, the application difficulties and challenges of HR3C steel were pointed out.

Key words: HR3C steel pipe, austenitic heat resistant steel, aging embrittlement, behavior characteristics, M₂₃C₆, failure

中图分类号:

TG111.91

句光宇. HR3C钢管高温服役脆化行为特征及预防泄漏措施[J]. 金属热处理, 2020, 45(11): 26-31.

Ju Guangyu. Characterization of embrittlement behavior and leakage prevention measures for HR3C steel pipe in high temperature service[J]. Heat Treatment of Metals, 2020, 45(11): 26-31.

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