热电厂锅炉高温过热器管爆管原因

Bursting Failure Analysis of High Temperature Superheater Tube in a Power Plant Boiler

摘要: 利用化学成分分析、力学性能测试、显微组织分析和X射线衍射物相分析等方法,对材料为T91钢的热电厂锅炉高温过热器管的爆管原因进行了分析.结果表明:高温过热器管材料的质量合格,异物阻塞管道造成其短时过热是过热器管爆管的主要原因,在距爆口一侧约30 cm处发现有异物残留.

Abstract: Bursting failure of the high temperature superheater tube of T91 steel in a power plant boiler was studied by chemical composition analysis,mechanical properties test,microstructure analysis and X-ray diffraction phase analysis. The results show that material of the superheater tube was qualified,and short-term overheating caused by the tube obstruction was themain reason for the bursting of the high temperature superheater tube. In addition,foreign matter was found in the area of 30 cm from the bursted position.