Flux cored wire for gas-shielded arc welding
A gas shielded and arc welding technology, applied in arc welding equipment, welding media, welding equipment, etc., can solve the problems of weld metal performance research, unclearness, and inability to meet the requirements of NACE, and achieve good low temperature toughness and welding operability good effect
Active Publication Date: 2017-05-31
KOBE STEEL LTD
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Problems solved by technology
[0010] However, in the flux-cored welding wire of the above-mentioned Patent Document 1, in order to ensure excellent low-temperature toughness, 0.1 to 3.0 mass % of Ni is added, and the Ni content of the weld metal may exceed 1 mass %, which cannot sufficiently cope with NACE. Require
In addition, the flux-cored welding wire described in Patent Document 1 lacks research on heat treatment conditions, and it is not clear whether a weld metal that is still excellent in yield strength, strength, and low-temperature toughness can be obtained when heat tre
Method used
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[0087] Hereinafter, examples and comparative examples of the present invention will be given, and the effects of the present invention will be specifically described. In this example, the steel sheath made of mild steel was filled with 13 to 20% by mass of flux, and each flux-cored wire of Examples and Comparative Examples having the compositions shown in Table 1 and Table 2 below was produced. At this time, the wire diameter was 1.2 mm. In addition, welding wire Nos. 1 to 13 shown in Table 1 below are examples within the scope of the present invention, and welding wire Nos. 14 to 28 shown in Table 2 below are comparative examples outside the scope of the present invention.
[0088] [Table 1]
[0089]
[0090] [Table 2]
[0091]
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Abstract
A flux cored wire, which is obtained by filling the inside of a steel outer skin with a flux, is configured to have a composition that contains, in mass% relative to the total mass of the wire, 0.01-0.12% of C, 0.05% or more but less than 0.30% of Si, 1.0-3.5% of Mn, 0.1% or more but less than 1.0% of Ni, 0.10-0.30% of Mo, 0.1-0.9% of Cr, 4.5-8.5% of TiO2, 0.10-0.40% of SiO2, 0.03-0.23% of Al2O3 and 80% or more of Fe.
Description
technical field [0001] The invention relates to a gas-shielded arc welding flux-cored welding wire. More specifically, it relates to a gas-shielded arc welding flux-cored wire used for welding steel materials having a tensile strength of 490 to 670 MPa. Background technique [0002] Conventionally, various studies have been conducted for the purpose of improving welding workability and improving the mechanical properties of the weld metal in flux-cored welding wires used for gas-shielded arc welding of steel materials with a tensile strength of 490 to 670 MPa. (For example, refer to Patent Documents 1 and 2.). [0003] Patent Document 1 proposes a flux-cored wire for gas-shielded arc welding, which has good welding operability in all postures, and obtains a weld metal excellent in strength and low-temperature toughness in the as-welded state (AW) and after heat treatment (PWHT). , and the wire composition is limited. The flux-cored welding wire described in Patent Documen...
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Patent Timeline
Login to view more IPC IPC(8): B23K35/368B23K35/30
CPCB23K35/368B23K35/3073B23K35/0266B23K35/3053B23K35/30B23K9/173
Inventor 韩鹏川崎浩之北川良彦名古秀德高知琢哉漆原亘冈崎喜臣
Owner KOBE STEEL LTD
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