15CrMo钢管蒸汽内氧化的微观特征  

Microstructure features of steam oxidation layer on 15CrMo steel tubes

作　　者：袁超[1] 胡正飞[1] 吴细毛 

机构地区：[1]同济大学材料科学与工程学院上海市金属功能材料开发应用重点实验室,上海200092 [2]东北电力科学研究院有限公司,辽宁沈阳110006

出　　处：《金属热处理》2012年第2期136-140,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(50871076)

摘　　要：某热电厂的过热器15CrMo钢管道仅运行3000 h就发生爆管事故,宏观检查显示,管材内壁发生严重的氧化腐蚀。利用SEM、EDS和XRD等方法,测试分析了15CrMo钢管不同位置的组织结构及氧化层的物相组成等。结果表明,钢管在服役过程中有严重的氧化腐蚀,形成内外两层氧化皮,氧化侵蚀主要先从晶界开始,再逐步扩展到晶内。The 15CrMo steel tubes of a thermal power plant was burst only serviced for 3000 h.Macroscopic test shows that the inner wall of the tubes was serious rusted.Microstructure of the 15CrMo steel tube in different position and composition of the oxide layer were analyzed by SEM,EDS and XRD.The results show that the serious high-temperature oxidation has eroded the tube during the service.The oxidation scale can be displayed as inside and outside two layers,the oxidation starts in the grain boundary,then gradually expands to intragranular.

关 键 词：15CRMO钢 高温蒸汽氧化 微观特征 

分 类 号：TG142.73[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—金属材料]