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Influence of long-term service on microstructure, mechanical properties, and service life of HCM12A steel

机译：长期使用对HCM12A钢的组织，力学性能和使用寿命的影响

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摘要

The investigated material was a pipe measuring phi 38 x 6.3, made of HCM12A steel used for coils of boiler superheaters at supercritical and ultra-supercritical parameters of steam. The article presents the results of research on mechanical properties and microstructure of the examined pipe material in the as-received condition and after 100 000 h of service at the temperature of 585 degrees C. Creep tests were carried out for the material serviced for 100 000 h to determine the available residual life. The influence of changes on mechanical properties and microstructure degradation on the loss of creep resistance was assessed compared with the as-received condition. Performed research has shown that the examined steel after 100 000 h of service fulfills the requirements set for this steel in the as-received condition within the range of strength properties at room and elevated temperature. The insignificant loss of life is confirmed by the results of creep test.
机译：被研究的材料是一根直径为φ38 x 6.3的管道，该管道由HCM12A钢制成，用于蒸汽过热器的超临界和超超临界参数的锅炉过热器盘管。本文介绍了在585°C的温度下使用10万小时后，在接收条件下以及经过10万小时维修后的管道材料的力学性能和微观结构的研究结果。 h确定可用的剩余寿命。与预期条件相比，评估了变化对机械性能和微结构退化对抗蠕变性的影响。进行的研究表明，在室温和高温下的强度性能范围内，经过100000小时的使用后，所检验的钢在初始状态下可以满足该钢所设定的要求。蠕变测试的结果证实了微不足道的生命损失。

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