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无缝线路是铁路现代化的重要标志之一,随着焊接技术的发展才使得焊接长钢轨无缝线路得到发展。我国从1956年开始着手筹备钢轨的焊接研究以来,先后进行了手工电孤焊、铝热焊、气压焊、接触焊的研究。全国共建立了十二个焊轨基地由气压焊钢轨方法开始,以后逐步发展了接触焊钢轨的设备。迄今为止在全国的范围内共约焊接了8,000公里的无缝线路。
Seamless track is one of the important symbols of railway modernization. With the development of welding technology, the long track of welded rail has been developed. Since 1956, China began to study the welding of the rail, it has carried out the study of manual electric arc welding, aluminum thermal welding, pressure welding and contact welding. The country has established a total of twelve rail base by the pressure welding rail method began, and later gradually developed a contact welding equipment. To date, a total of 8,000 kilometers of seamless lines have been welded across the country.