超超临界电站锅炉用关键材料

讨论了我国电站锅炉向大容量、高参数超超临界机组发展的趋势及对材料的要求.针对这一发展趋势,宝钢开展了超超临界电站锅炉用关键材料的研制.试验数据及生产、供货实绩表明,宝钢已具备了向主蒸汽600℃超超临界电站锅炉受热面关键部件——水冷壁、过热器和再热器整台机组供货能力,替代了进口产品,缩短了我国电站锅炉材料与国外的差距.同时,根据未来我国700℃超超临界机组的发展要求,开展了高温部件所用材料的筛选、研制及评定等,以支撑我国超超临界机组的发展.

Key materials used in ultra-supercritical power station boilers

This paper discussed the development trend of ultra-supercritical units for power plant boilers in China and their requirements for materials.In response to this trend,researches on the key materials used in ultra-supercritical boilers were performed in Baosteel Iron & Steel Co.Ltd.Experiment data and materials production indicate that Baosteel is able to supply materials used in complete units for the key components of 600 ℃ ultra-supercritical boiler heating surfaces,such as water-cooled walls,superheaters and reheaters,which can displace the imported materials and narrow the gap between boiler materials in China and oversea.According to development requirements for 700 ℃ ultra-supercritical units in China,the selection,development and evaluation of materials used in high-temperature parts were carried out in order to support the development of domestic ultra-supercritical units.