15CrMoG过热管爆管失效原因分析  

Analysis on Bursting Reason for 15CrMoG Superheater Tube

作　　者：马敏莉[1] 于竞钦 肖轶[1] 余秋阳 

机构地区：[1]南通职业大学,江苏南通226007 [2]江苏金通灵流体机械科技股份有限公司,江苏南通226009

出　　处：《热加工工艺》2014年第24期237-239,共3页Hot Working Technology

基　　金：南通市应用研究计划项目(BK2013033)

摘　　要：采用断口宏观形貌、化学成分、金相组织和力学性能等方法,分析了15CrMoG过热管爆管失效的原因。结果表明,短时间在900℃以上高温并伴有管道压力,可引起管材塑性变形,并超过管材强度,这是15CrMoG过热管爆管失效的主要原因。The bursting 15CrMoG superheater tube occurs in use. The failure reasons by the macro appearance of fracture, chemical composition, metalographic structure and mechanical properties and so on were analyzed. The results of analysis show that the main reason is that 15CrMoG superheater tube deforms due to the pipeline pressure in a short time, which is more than 900℃, and the tube bursts when the deformation increases to more than the material limit strength.

关 键 词：15CrMoG过热管 爆管失效 回火索氏体 蠕变裂纹 

分 类 号：TG113.2[金属学及工艺—物理冶金]