气动凿岩机活塞失效的分析与研究

Mining & Processing Equipment(2019)

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Abstract
使用光学显微镜、电子显微镜对气动凿岩机活塞失效试样进行分析.发现凿岩机活塞外表面组织为回火马氏体和少量的残余奥氏体,芯部组织为回火索氏体,内表面组织为板条马氏体和大量的残余奥氏体.冲击韧性试验表明,活塞内表面处试样冲击韧性平均值为46 J/cm2,与材料30CrNi4Mo冲击韧性值范围110~184 J/cm2相差很大,此为活塞失效的主要原因.
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