工业锅炉烟管弯曲变形失效分析

Bending Deformation Fracture Analysis on Fire Tubes of an Industrial Boiler

工业锅炉运行中发生烟管弯曲变形失效。借助化学成分分析、拉伸试验、金相检验等对其弯曲变形的原因进行了分析。结果表明:该工业锅炉烟管弯曲变形是因为管壁温度较高,在烟管重力和热应力长期作用下的结果。

The fire tubes bended when the industrial boiler was in service. Through a series of testing methods including chemical composition analysis, tensile test and metallographic examination, the fracture cause was analyzed. The results showed that the gravitational force of the fire tubes and the heat stress caused the bending fracture of the fire tubes while the temperature of tube wall was very high.