Cross sector seamless line, namely rail bar, rail bar and rail switch directwelding; the vertical force and displacement are direct transmitted between rail bars.
跨区间无缝线路，即轨条与轨条、轨条与道岔直接焊接，轨条之间直接传递纵向力和位移。
2
The mechanical testing results showed that tensile strengths of samples welded by directwelding is only 31.24% of that of the parent metal, and 50.89% of that by "in-situ" welding.
Modern analytical methods have been used to investigate the patterns of fusion zone and the diffusion behaviors of elements by tig directwelding and tig with Sn as transition layer welding.