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一、前言随着我国社会主义建设的飞速发展,铁路运输的日趋繁忙,各种机车、车辆的载荷、速度和运转周期也越来越增大起来。这就导致车轴破损率的不断提高。近几年来,不论是在电力机车、内燃机车,还是蒸汽机车车轴上,都陆续发现大量裂纹。据调查,1973年前进型蒸汽机车中,裂纹轴占40%,1976年初,田心机车工厂在厂修的两个月中,发现煤水轴的裂纹轴也占三分之一以上,而电力机车中,进口的6Y2型机车裂纹轴
I. Introduction With the rapid development of socialist construction in our country and the increasingly heavy railway transportation, the load, speed and operation cycle of various locomotives and vehicles are also increasing. This leads to an ever-increasing rate of axle breakage. In recent years, both in electric locomotives, diesel locomotives, or steam locomotive axles, one after another to find a large number of cracks. According to the survey, in 1973 forward-type steam locomotive, the crack axis accounted for 40% of the early 1976, Tian Xin Locomotive Factory repair factory in the two months and found that the axis of coal-fired shaft also accounts for more than one-third of the crack, and electricity Locomotive, imported 6Y2 locomotive crack axis