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SA-335P9 1材料以其高强韧性、抗蠕变性能、以及良好的抗高温氧化和抗腐蚀性能而被广泛地应用于火电厂高温受压部件。我国GB5310—2008《高压锅炉用无缝钢管》标准中的10Cr9M0lVNbN即为P91,国内部分钢铁企业也生产P91钢管。但是由于国产P91钢管与进口P91钢管还存在一定差距,另外对进口P91钢管国内加工,制管工艺、热处理工艺等原因,导致关于P9 1钢管材料异常的问题在火电机组锅炉中时有发生。1问题描述南方某电厂在建的1台由上海锅炉厂有限公司设计制造的1000MW机组塔式直流锅炉,其中一级过热器至二级过热器联通管道采用了P91,规格为
SA-335P9 1 material is widely used in high-temperature compression parts of thermal power plants due to its high strength and toughness, creep resistance and good resistance to high temperature oxidation and corrosion. China GB5310-2008 “high pressure boiler seamless steel pipe” standard 10Cr9M0lVNbN that is P91, some domestic steel companies also produce P91 steel. However, due to the gap between domestic P91 steel pipe and imported P91 steel pipe, the domestic P91 steel pipe processing, pipe manufacturing process, heat treatment process and other reasons led to the P9 1 steel pipe material abnormalities in the thermal power unit boiler occurred from time to time. 1 Problem description A power plant under construction in South China 1 boiler plant by the Shanghai Co., Ltd. 1000MW design and manufacture of the tower DC boilers, one of the superheater to the second superheater Unicom pipeline with P91, the specification is