【摘要】 通过金相及ＳＥＭ 等手段，分析了某重型汽车４５ 钢曲轴早期失效断口，认为冶金夹杂物的超标、偏聚及表面淬火硬度不均匀是引起该轴早期断裂的主要原因。更多还原

【Abstract】 This paper analysed the causes of the early broken crankshaft on heavy duty truck by OM and SEM.The result shows that the breaking of this crankshaft is mainly caused by impurity segregation and imhomogeneous surface handness after quenching.更多还原