DLA Piper LLP (US)
Friction stir welding method for structural steel and method of manufacturing joint for structural steel
A process of pre-heating treatment is performed such that steel sheets or plates as working materials are heated by a heating unit provided ahead of a rotational tool moving in a welding direction to precisely control the surface temperature, area, position and the like of a heating region in the process of pre-heating treatment when performing friction stir welding on structural steel.
JFE Steel Corporation
B B
B23K B23K
inventional inventional
Rinsei Koichi Muneo
Ikeda Taniguchi Matsushita