抄録
At the joint of the ordinary piping of the carbon steel using the conventional welding methods or the mechanical joining, the formation of step is hard to avoid, which causes the stress concentration. We proposed the new welding method of the braze-pressure-welding (B.P.W) by the electromagnetic induction heating. The process uses the brazing filler material inserted at the joint interface, which is expected to fill the step to form fillet. It is considered to relief the stress concentration. In this research, the validity of the fillet is evaluated by the stress analysis using the finite element method. The carbon steel pipes are welded by this B.P.W. method in the air. The method to avoid the hard oxidation of the pipe is also proposed. At the joint, the oxidation is slightly occurred and the fillet is formed. The EDS analysis of the distribution of the atomic contents shows the brazing filler is ejected out of the joint interface. The tensile test yields the joint has the comparable strength with the bulk material.
