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A flux-cored welding wire for aluminum-plated stainless steel welding

A technology of flux-cored welding wire and stainless steel, which is applied in welding media, welding equipment, welding/cutting media/materials, etc. It can solve the problems of poor high-temperature corrosion resistance of aluminized stainless steel plates, and achieve excellent crack resistance and high-temperature corrosion resistance. Good, the effect of excellent welding process performance

Active Publication Date: 2017-06-30
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problem of poor high temperature corrosion resistance of the weld seam after welding the aluminized stainless steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] The flux-cored welding wires of the following examples of the present invention are composed of a sheath, a flux core filled in the sheath, and an aluminum layer plated on the outer surface of the sheath. Wherein, the composition of the drug core and its percentage in the total mass of the drug core and the skin are: graphite: 0.03-0.07%, SiO 2 : 0.30~0.90%, Mn: 1.1~1.8%, Cr: 11~14%, boron nitride: 0.15~0.50%, vanadium iron (60% by mass containing vanadium): 0.05~0.35%, the balance is Fe.

[0036] In Examples 1 to 7, the preparation method of flux-cored welding wire: use the steel strip method to produce flux-cored welding wire, O-shaped butt joint, and fill the outer skin made of low-carbon stainless steel strip with powder (uniformly mixed flux core components), The filling rate is 18-20% (the mass percentage of the core in the total mass of the core and the sheath), after forming and drawing, the surface is plated with aluminum (the thickness of the aluminum layer i...

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Abstract

The invention discloses a flux-cored wire for aluminized stainless steel welding. The flux-cored wire is comprises a sheath, a flux core and an aluminium layer, wherein the sheath is filled with the flux core; the aluminium layer is plated on the outer surface of the sheath; the sheath is low carbon stainless steel; the flux core comprises the following components in percentage by weight: 0.03-0.07% of graphite, 0.30-0.90% of SiO2, 1.1-1.8% of Mn, 11-14.0% of Cr, 0.15-0.50% of boron nitride, 0.05-0.35% of ferrovanadium with the vanadium-containing amount of 60%, and the balance of Fe; the flux core (made from the components) is 18-20% of the total weight of the flux core and the sheath. After the aluminized stainless steel is welded through the flux-cored wire, the tensile strength is greater than 550 MPa, and the deposited metal KV2(-30 DEG C) is greater than 100 J.

Description

technical field [0001] The invention relates to a welding material for metal welding, and the invention relates to a flux-cored welding wire for welding aluminized stainless steel. Background technique [0002] In recent years, in cold regions, in order to prevent the automobile exhaust system (such as the muffler or exhaust tailpipe) from being frozen, rock salt is sprinkled on the automobile exhaust system, but it will cause high-temperature corrosion of the automobile exhaust system. The high temperature corrosion resistance of the exhaust system has become a problem that needs to be solved. For this reason, the automobile exhaust system adopts stainless steel, but stainless steel is also prone to red rust, and its corrosion resistance is not ideal. At present, in order to fully improve the corrosion resistance of the automobile exhaust system, aluminized stainless steel is used to greatly increase the service life. However, after high-temperature welding of aluminized s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40B23K35/12
CPCB23K35/0266B23K35/3053B23K35/40
Inventor 孟庆润周海龙杨宗全
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD