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1.绪言 面向超超临界压力发电设备的实现,主要致力于在650℃、350大气压水蒸气这样的极苛刻环境下使用的9～12％Cr耐热钢的研究开发。 火力发电设备,承受日夜负荷变换的运动,在新材料方面需要明确高温疲劳特性。铁素体系钢,在热膨长方面比奥氏体钢有利,但在650℃的极苛刻蒸气环境中,蠕变、疲劳、环境的相互作用有可能成为支配运转设备的服役寿命的重要因素。这样,在本研究中,为讨论初始的
1. INTRODUCTION For the realization of ultra-supercritical pressure power generation equipment, it mainly focuses on the research and development of 9-12% Cr heat-resisting steel for use in extremely harsh environments such as steam at 350 ° C at 650 ° C. Thermal power generation equipment, to withstand the movement day and night load changes, the need for new materials, high temperature fatigue characteristics. Ferritic steels are more favorable for thermal expansion than austenitic steels, but creeping, fatigue, and environmental interactions can be an important factor governing the service life of running equipment in extremely harsh steam environments at 650 ° C. So, in this study, we discuss the initial