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    邢怀念, 张小鹏, 刘增利, 葛飞. 龙门起重机用钢轨断裂的原因[J]. 机械工程材料, 2009, 33(3): 98-100.
    引用本文: 邢怀念, 张小鹏, 刘增利, 葛飞. 龙门起重机用钢轨断裂的原因[J]. 机械工程材料, 2009, 33(3): 98-100.
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    XING Huai-nian, ZHANG Xiao-peng, LIU Zeng-li, GE Fei. Fracture Reason for Gantry Crane Rail[J]. Materials and Mechanical Engineering, 2009, 33(3): 98-100.
    Citation: XING Huai-nian, ZHANG Xiao-peng, LIU Zeng-li, GE Fei. Fracture Reason for Gantry Crane Rail[J]. Materials and Mechanical Engineering, 2009, 33(3): 98-100.
    shu

    龙门起重机用钢轨断裂的原因

    Fracture Reason for Gantry Crane Rail

      摘要
    • 摘要: 采用力学性能试验和金相分析等方法,对龙门起重机用钢轨断裂的原因进行了分析.结果表明:在接地线用导电钢筋与钢轨焊接的焊缝附近存在一些较大的孔洞,在热影响区内存在穿晶裂纹,这些微观缺陷构成了多个裂纹源,这些裂纹源在外界交变载荷的作用下,逐渐扩展,最终导致了钢轨的疲劳断裂.

       

      Abstract: Mechanical property test and metallographic analysis were used for analysis of the fracture reason of a gantry crane rail.The results indicate that there were some large holes around the seam between the conductive steel and the rail,and some transcrystalline cracks were found in the heat-affected zone,which formed the crack sources.Under the working load,these cracks sources propagated gradually,and finally led to fatigue fracture failure of the rail.

       

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