Pure argon gas shielded welding mig flux-cored wire and mig arc welding method

A technology of flux-cored welding wire and welding wire, used in arc welding equipment, welding/welding/cutting items, welding medium, etc., can solve problems such as solidification cracks, achieve high static tensile strength and fatigue strength, and suppress slag and smoke. , low cost effect
CN101559544AActive Publication Date: 2009-10-21KOBE STEEL LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
KOBE STEEL LTD
Publication Date
2009-10-21

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Abstract

A pure Ar-MIG welding wire for welding steel according to the present invention is formed of a flux-cored wire. The flux-cored wire is formed in the manner that a formation formed by welding a carbon steel hoop into a pipe shape or a seamless pipe is used as an outer sheath, the outer sheath is filled with a flux, and a wire drawing process is performed. The flux accounts for 7 to 27 mass% of the total wire mass. The wire contains graphite in the amount of 0.16 to 2.00 mass% on the basis of the total wire mass and iron powder in the amount of 20 mass% on the basis of the total flux mass. According to the construction, neither expensive metal resource nor a greenhouse effect gas is used, slag and fume generation is inhibited, and a weld joint having a high static tensile strength and fatigue strength can be obtained.
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Description

technical field

[0001] The present invention relates to a MIG flux-cored wire for pure Ar gas shielded welding used for MIG arc welding of steel materials using pure Ar gas as a shielding gas, and a MIG flux cored wire for gas shielded arc welding while discharging the wire from a welding torch. arc welding method. Background technique

[0002] Unlike the case where the base material is an aluminum alloy material, in gas shielded arc welding of steel materials, an inert gas shielded arc welding method using pure Ar is considered to be substantially impossible. The reason for this is considered to be that when a steel material is used as an electrode, an oxide having low energy is required for electron emission. However, pure Ar gas will not form oxides on the surface of the steel plate or the front end of the welding wire. Therefore, CO is generally used alone 2 or mix CO in Ar 2 or O 2 gas as shielding gas. However, if CO 2 and O 2 In the presence of such an oxidizi...

Claims

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