75t/h CFB高压锅炉过热器管短期损伤断裂原因分析  

Analysis on crack of 75 t/h CFB high-pressure boiler superheated tube

作　　者：王晓峰[1] 高玉明[1] 马慧霞[1] 李文竹[1] 黄磊[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《金属热处理》2011年第11期120-122,共3页Heat Treatment of Metals

摘　　要：利用光学显微镜和扫描电镜对75 t/h CFB高压锅炉损伤的过热器管断口及组织进行了观察及分析。结果表明,过热器断裂原因是管壁局部超高温氧化和管壁非正常减薄,导致热强度性能降低,最终破损断裂。The fracture and microstructure of 75/h CFB high-pressure boiler superheated tube were observed and analyzed by microscope and scanning electron microscope.The results show that the local superheated tube wall had been undergone ultra-high temperature oxidation and abnormally thinned,and this resulted in decrease of the thermal strength properties and led to fracture of the high-pressure boiler superheated tube.

关 键 词：过热器管 高温氧化 断裂 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]