By way of studying thehardness of rail weld after flash welding or thermit welding, it is shown that bainite rail AB1 has higher.

• 介绍了熄焦车轨道改造前存在的问题,对铝热焊接进行了理论分析,阐述了铝热焊接行车轨道的社会效益及经济效益。