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采用扫描电镜、光学显微镜、化学分析等方法 ,分析了某大型汽轮机主油泵进油软管断裂的原因 ,分析认为 ,焊接产生的高温低塑性裂纹是导致进油软管断裂的主要原因。
The reason of rupture of oil inlet hose of main steam pump of a large steam turbine was analyzed by means of scanning electron microscope, optical microscope and chemical analysis. The analysis shows that the high temperature and low plasticity crack caused by welding is the main reason of rupture of oil inlet hose.