2807 オーステナイトステンレス鋼管継手へのろう付圧接技術の適用性(S35-2 溶接・接合の動向とその展開(2),S35 溶接・接合の動向とその展開)

抄録

Braze Pressure Welding (BPW) with high frequency induction heating is a newly developed pressure welding technique using interlayer metals for welding the general steel pipes for pipe arrangement in buildings. At a joining temperature in this method, the melted interlayer removes contaminations from the joining surface of the base metal. Then the liquid filler is discharged from the joining interface by the joining pressure, and forms fillets at the gaps around the joint. The fillets have the effects both on relaxing the stress concentration at the joint and on increasing the joining area, which contribute to the strengthening of the joint. Thus, the high quality pipe joining without the dispersion in joint properties due to welder's skill can be performed. In this report, applicability of the BPW technology to austenitic stainless steel pipe joint is investigated and discussed on the results of microscopy and tensile tests of the joints.