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1问题的提出近年来,随着铁路运输提速、重载的发展,旧型转向架逐步被淘汰,120km/h的转K2型转向架成为载重60t货车的主型转向架。目前,已有部分转K2型转向架陆续进入厂修期。在厂修过程中发现,侧架、摇枕裂纹情况很突出,尤其是A、B部位的横裂纹,因贯通缺陷或缺陷面积大于20cm2、
1 PROBLEM PROBLEM In recent years, with the development of speeding and overloading of railway transportation, the old bogies have been gradually eliminated. The 120km / h turning K2 bogie becomes the main type of bogie carrying 60t trucks. At present, some of the Zhuan K2 bogies have gradually entered the factory repair period. Found in the factory repair process, the side frame, bolster crack situation is very prominent, especially A, B parts of the transverse cracks, due to through the defect or defect area is greater than 20cm2,