PROBLEM TO BE SOLVED: To provide a solid wire for gas shielded arc welding, the solid wire that is highly efficient and provides excellent mechanical performance in a weld zone when carbon dioxide gas shielded arc welding is applied to a carbon steel whose strength is not higher than 520 N/mm 2 class. SOLUTION: The solid wire for gas shielded arc welding has the composition containing, by mass%, 0.70-1.00% Si, 1.50-1.90% Mn, 0.005-0.025% S, 0.19-0.25% Ti, 0.12-0.35% Mo, 0.020-0.100% C, ≤0.0050% B, and ≤0.45% Cu, wherein P and O is regulated to, by mass%, ≤0.020% and ≤0.0160%, respectively, and Si/Mn is controlled to ≥0.385, total contents of Mn and Mo is controlled to ≤2.20 mass%, and total contents of S and O is controlled to ≤0.034 mass%, and wherein when C content (mass%) is [C] and B content (mass%) is [B], the following expressions are satisfied. When 0.020≤[C]≤0.05, [B]≥0.0015; when 0.050<[C]<0.060, [B]≥0.009-0.15×[C]; and when 0.080≤[C]≤0.100, [B]≤0.013-0.10×[C]. COPYRIGHT: (C)2006,JPO&NCIPI

Solid wire for gas shielded arc welding

PROBLEM TO BE SOLVED: To provide a gas shielded arc welding method by which weld metal having a superior strength and toughness is obtained, even in multi-layer welding with high heat input and high interpass temperature, and by which improved weldability is demonstrated by reducing the mount of the occurrence of spatter and of formation of slag at welding SOLUTION: Welding is performed by using: a welding steel wire composed of a steel wire stock containing by mass 001-010% C, 02-12% Si, 10-25% Mn, 005-020% Ti, 0003-0020% S, ≤0020% P, 005-05% Mo, 005-03% Cr, ≤05% Cu, 0005-002% Al, and 00005-00050% B; and gaseous mixture containing 10-50 volume % Co 2 and 50-90 volume% Ar as a shielding gas, thereafter time required until the bead of the final pass is cooled from 800°C to 500°C is adjusted to 15-450 seconds COPYRIGHT: (C)2005,JPO&NCIPI

Gas-shielded arc welding method

A metal core weld wire for producing weld deposits with improved removability of slag islands comprising a steel sheath and a core, a core composition disposed in the core, the core composition including a slag-modifying additive selected from the group consisting of antimony and compounds thereof.

Weld wire with enhanced slag removal

PROBLEM TO BE SOLVED: To provide a flux cored wire for gas shielded arc welding, a flux cored wire that causes no deterioration in toughness in a reheating part even if continuous welding is performed for a member with a short welding length under conditions of high heat input and high interpass temperature. SOLUTION: The flux cored wire has a steel jacket and flux comprising metallic and non-metallic components held by the steel jacket, wherein the composition of the wire components contains in mass % 0.001-0.05% C, 0.50-1.2% Si, 1.50-3.0% Mn, 0.10-0.30% Ti, 1.5-5.0% Ni, 0.05-0.30% Mo, and 0.0005-0.0025% B, and the non-metallic components contains at a ratio of 0.1-2% in mass % to the entire wire. COPYRIGHT: (C)2006,JPO&NCIPI

Flux cored wire for gas shielded arc welding

PROBLEM TO BE SOLVED: To provide a steel wire for carbon dioxide gas-shielded arc welding, which is made of steel material and stably forms a bead with excellent shape even when used with straight polarity, and to provide a welding method using the same. SOLUTION: When conducting high-current carbon dioxide-shielded arc welding such as fillet welding or multilayer welding of a thick steel plate, a steel wire for carbon dioxide gas-shielded arc welding made of steel material containing 0.015-0.100 mass% rare earth elements and containing one or two kinds of elements from Se and Te of total 0.005-0.100 mass% is used. Straight polarity welding is conducted, while an arc point is shielded with a shield gas containing ≥ 60 vol.% CO 2 . COPYRIGHT: (C)2005,JPO&NCIPI

Steel wire for carbon dioxide gas-shielded arc welding, and welding method using the same

PROBLEM TO BE SOLVED: To provide a welding wire which can maintain a stable feeding performance even in such critical working conditions that the feeding speed of the welding wire increases or the temperature of the welding wire increases as is the case with the gas shielded arc welding under a high heat input and high interpass temperature. SOLUTION: The steel wire material of the welding wire comprises C:0.005-0.09 mass%, Si:0.50-1.2 mass%, Mn:1.50-2.2 mass%, Ti:0.15-0.30 mass%, B:0.0005-0.0035 mass%, Cu:≤0.50 mass%, S:0.005-0.025 mass% and the balance Fe with unavoidable impurities. The surface of the welding wire is covered by a solid lubricant layer of 0.2-1.0 g per the steel wire material of 10 kg, and the surface of the solid lubricant layer is coated with a lubricant of 0.2-1.8 g per the steel wire material of 10 kg. COPYRIGHT: (C)2004,JPO&NCIPI

Steel wire for gas shielded arc welding

PROBLEM TO BE SOLVED: To provide welding wire with which, while mechanical properties of deposited metal are secured in welding conditions of high heat input-high interpass temperature in which efficiency is regarded as most important, satisfactory welding operability is secured as well in the low heat input welding condition in which welding defects are easily generated since there is a limitation in heat input such as horizontal welding is simultaneously satisfiable. SOLUTION: This wire for carbonic acid gas shielded arc welding has a composition including a plated layer, by mass, 0.005 to 0.09% C, 0.65 to 1.2% Si, 1.5 to 2.2% Mn, 0.15 to 0.30% Ti, 0.0005 to 0.0025% B, ≤0.5% Cu, 0.0001 to 0.0030% K and 0.005 to 0.025% S, and the balance substantially Fe, also CE(1) is controlled to ≥0.45%, and KEQ to 0.02 to 0.10; wherein, KEQ=(50×K +0.5×S)/(Ti+Si+Al), and CE(1)=C+Mn/6+Si/24. COPYRIGHT: (C)2002,JPO

Wire for gas shielded arc welding

PROBLEM TO BE SOLVED: To provide a welding method in which reduction in spatters and improvement in bead shapes can be attained, in performing fillet welding by using a shielding gas with CO 2 as the main component and using a welding steel wire composed of steel wire. SOLUTION: The fillet welding is performed by a gas shielded arc welding method using a welding steel wire which is composed of a steel wire containing 0.015-0.100 mass% of rare earth elements. COPYRIGHT: (C)2005,JPO&NCIPI

健次時乗

Papers

Steel wire for gas shielded arc welding

Wire for gas shielded arc welding

Fillet welding method

健次 時乗

Papers

Steel wire for gas shielded arc welding

Wire for gas shielded arc welding

Fillet welding method

健次時乗