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。
HR3 C 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 HR3 C steel pipe under high temperature aging and service state were systematically analyzed,and the preventive measures for the leakage of brittle HR3 C steel pipe were put forward.Finally,the application difficulties and challenges of HR3 C steel were pointed out.
作者
句光宇
Ju Guangyu(Central-China Electric Power Research Institute,China Datang Corporation Science and Technology Research Institute,Zhengzhou Henan 450001,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第11期26-32,共7页
Heat Treatment of Metals
