SOLID WIRE FOR WELDING ALUMINUM PLATED STEEL SHEET, AND METHOD FOR MANUFACTURING WELD JOINT

• Main Authors: TAIYAMA MASANORI, ISHIDA KINYA, OKADA TORU, TATSUMI YUJIRO
• Format: Patent
• Language: English; Japanese
• Published: 26.06.2023
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

To provide a solid wire for welding an aluminum plated steel sheet and a method for manufacturing a weld joint which enable formation of weld metal having high hardness after hot stamp even when aluminum (Al) is mixed in weld metal when high-strength aluminum plated steel sheets having tensile strength of 1,800 MPa or more are welded after hot stamp.SOLUTION: A solid wire for welding an aluminum plated steel sheet is a solid wire for welding an aluminum plated steel sheet, in which contents of a chemical composition is, by mass% with respect to the total mass of the wire, 0.25-0.35% C, less than 0.30% Si, 1.8-2.5% Mn, 0.30-1.00% Mo, 0.050% or less P, 0.030% or less S, 0.10% or less Al, 0.010% or less N, 0.50% or less Cu, and the balance Fe with inevitable impurities.SELECTED DRAWING: None 【課題】ホットスタンプ後に引張強度１８００ＭＰａ以上となる高強度アルミニウムめっき鋼板同士を溶接した際にアルミニウム（Ａｌ）が溶接金属に混入したとしても、ホットスタンプ後に高い硬さを有する溶接金属を形成可能なアルミニウムめっき鋼板の溶接用ソリッドワイヤ及び溶接継手の製造方法を提供する。【解決手段】 本発明のアルミニウムめっき鋼板の溶接用ソリッドワイヤは、アルミニウムめっき鋼板の溶接用ソリッドワイヤであって、ワイヤ全質量に対する質量％で、化学組成の含有量が、Ｃ：０．２５％～０．３５％、Ｓｉ：０．３０％未満、Ｍｎ：１．８％～２．５％、Ｍｏ：０．３０％～１．００％、Ｐ：０．０５０％以下、Ｓ：０．０３０％以下、Ａｌ：０．１０％以下、Ｎ：０．０１０％以下、Ｃｕ：０．５０％以下、であり、残部がＦｅ及び不純物からなる。【選択図】なし