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轮对是铁道车辆走行部的关键部件,它们的质量除与材质有直接联系外,还与轮对的加工、组装有密切关系。同样材质的轮、轴,由于加工粗糙、组装不好会使寿命显著缩短。仅1982年上半年,车辆运用部门就发生八起断轴事故(RW_(22)51016、RW_(22)51019车轴热切,C_(62)A747736、YZ_(21)23655、C_(50)55337轮座镶入部冷切和C_(50)943250、C(60)m742500、C_(50)940474车轴中央冷切)。除热切外,从断口情况看,脆性断面的面积最大的只占整个断面面积的30％,最小的仅22％,这说明轴中央和轮座部承受的名义应力是不高
Wheelsets are the key components of railway vehicles running, their quality is directly related to the material, but also with the wheel assembly, assembly are closely related. The same material wheel, shaft, due to rough machining, poor assembly will significantly shorten the life expectancy. In the first half of 1982, there were eight shaft accidents (RW_ (22) 51016, RW_ (22) 51019), axles of C_ (62) A747736, YZ_ (21) 23655 and C_ (50) 55337 Inset cold cuts and C_ (50) 943250, C (60) m742500, C_ (50) 940474 Axles center cold cut). In addition to eager, from the fracture situation, the largest brittle fracture area accounted for only 30% of the entire cross-sectional area, the smallest only 22%, indicating that the central axis and the wheel bearing nominal stress is not high