アンダーマッチングの490Nlmm2級鋼材への適用に関する研究
(その1:TIG溶接適用の場合)
キーワード:
溶接継手疲労脆性破壊アンダーマッチング
1999 年 6 巻 24 号 p. 123-132
詳細
1999 年 6 巻 24 号 p. 123-132
This paper presents experimental and numerical studies on the effects of undermatched welds with pure iron welding wires using GTAW process on 490N/mm2 class steels. Undermatched welds prevent cold cracking without preheating, and allow the use of short bead welding without reducing fracture toughness of base metals and welds, then they prevent brittle fracture under high strain rate like seismic load. The results of fatigue tests of welded joints showed that undermatched welds reduce stress concentrations and improve fatigue strength.
