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前言 为了适应铁路运输事业向大运量、高速度发展,我国部分铁路干线采用60公斤钢轨铝热焊无缝线路试验,取得了较好的效果,为无缝线路的实施,创造了良好的开端。 但近年来,在无缝线路的个别地段的个别钢轨上出现焊接区穿焊缝断裂现象,而这种断裂现象往往容易出现在冬季焊轨上。 经二部(冶金部、铁道部)有关单位研究认为:“材质及焊接工艺都没有问题”。我校建筑系陈岳源等老师在研究钢轨焊后残余应发现焊后钢轨残应力有明显增加而
Preface In order to adapt to the railway transport undertaking to the large volume and high speed development, some of China’s railway lines using 60 kg rail aluminum hot welded seamless line test and achieved good results for the implementation of seamless lines, creating a good The beginning. However, in recent years, welding seam rupture occurred in some welded rails on individual rails of individual sections of CWR, and this rupture phenomenon often appears on the welding track in winter. After two (Ministry of Metallurgy, Ministry of Railways) relevant units that: “Material and welding process are no problem.” Chen Yuanyuan and other teachers in the Department of Architecture of our school have noticed that there is a significant increase in residual stress of rail after welding after studying the residual of rail welding