BOND FLUX FOR SUBMERGED ARC WELDING OF DUPLEX STAINLESS STEEL

• Main Authors: KAWADA JUNICHI, KUBO YUYA
• Format: Patent
• Language: English; Japanese
• Published: 18.07.2019
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To provide a bond flux for submerged arc welding of duplex stainless steel capable of obtaining a weld metal in which the pockmark on a weld bead surface at welding is inhibited; a slag peelability is favorable; a weld bead is smooth; and slag inclusion does not occur.SOLUTION: A bond flux for submerged arc welding of duplex stainless steel includes in mass%, 25-45% of CaF, 25-45% of AlO, 5.0-15% of SiO, 4.0-9.0% of BaCO, 3.0% or less of Mn and 3.1-9.3% of the sum of alkali metal oxides, 90% or more of the sum of CaF, AlO, SiO, BaCO, Mn and alkali metal oxides, and substantially does not include lime and magnesium oxide.SELECTED DRAWING: None 【課題】溶接時の溶接ビード表面のポックマークが抑制され、スラグ剥離性が良好かつ、溶接ビードが平滑であり、スラグ巻き込みが発生しない溶接金属を得る。【解決手段】ＣａＦ２：２５〜４５質量％、Ａｌ２Ｏ３：２５〜４５質量％、ＳｉＯ２：５．０〜１５質量％、ＢａＣＯ３：４．０〜９．０質量％、Ｍｎ：３．０質量％以下、及びアルカリ金属酸化物の合計：３．１〜９．３質量％を含有し、石灰及び酸化マグネシウムを実質的に含有せず、ＣａＦ２、Ａｌ２Ｏ３、ＳｉＯ２、ＢａＣＯ３、Ｍｎ、及びアルカリ金属酸化物の合計で、９０質量％以上含有する二相ステンレス鋼のサブマージアーク溶接用ボンドフラックス。【選択図】なし