【摘要】 对某电站转轮叶片裂纹原因进行了分析。分析结果表明,由于次表面夹杂物存在,在夹杂物周边产生局部应力集中,在焊接残余应力、工作应力共同作用下,疲劳裂纹在应力集中区域萌生,不断扩展,导致叶片开裂。更多还原

【Abstract】 The reason of cracks of the runner blade of certain power station is analyzed in this paper. The result state that the fatigue crack began from cracks extended under the effect of welding stress. The working stress and blade fractured at last.更多还原