A metal-cored welding wire for welding automobile exhaust pipes

A technology of automobile exhaust and metal core, which is applied in the direction of welding medium, welding equipment, metal processing equipment, etc., can solve the problems affecting the service life of automobiles, exhaust pipe weld seam oxidation, weld seam fracture, etc., and achieve high production efficiency, Beautiful weld shape and stable molten pool

Active Publication Date: 2017-07-25
上海焊接器材有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing exhaust pipe welding materials cannot meet the needs of automobile development, the weld seam of the exhaust pipe is often oxidized and severely corroded, which eventually leads to the fracture of the weld seam and affects the service life of the automobile. The purpose of the present invention is to provide a Good resistance to high temperature oxidation and corrosion resistance, metal cored wire for welding automobile exhaust pipes

Method used

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  • A metal-cored welding wire for welding automobile exhaust pipes
  • A metal-cored welding wire for welding automobile exhaust pipes
  • A metal-cored welding wire for welding automobile exhaust pipes

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Embodiment Construction

[0013] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific examples.

[0014] The ferritic stainless steel metal-cored welding wire provided by the solution of the present invention is composed of a corresponding sheath and a flux core of the welding wire filled in the sheath.

[0015] In order to achieve good high-temperature oxidation resistance and corrosion resistance, the flux core of the welding wire in the scheme of the present invention includes a large amount of deoxidizing and denitrifying agent, very little slagging agent and an appropriate amount of strengthening alloy elements. The main components and weight percentage of the metal core are as follows :

[0016]

[0017]

[0018] In order to further improve the resistance to high temperature oxidation and intergranular corrosion of the weld, 1-3% carb...

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Abstract

The invention discloses a metal cored welding wire for welding of an automobile exhaust pipe. The welding wire comprises a welding wire flux core and an outer sheath wrapping the outer side of the welding wire flux core; the welding wire flux core comprises the following components in percentage by weight: 40-70% of chrome metal, 15-35% of ferrotitanium, 1-6% of manganese metal, 2-8% of ferrosilicon, 3-5% of Al-Mg alloy, 3-6% of an arc stabilizer and 1-3% of carbides. During welding, the welding wire is very low in splash, few in residue, stable in arc, and suitable for welding of a tail pipe, a silencer and the like used in an automobile exhaust system; through adoption of the welding wire, a formed welding seam is attractive.

Description

technical field [0001] The invention relates to welding technology, in particular to a welding material. Background technique [0002] Exhaust pipe is one of the important parts of automobiles. In order to improve the service life of automobiles, higher requirements are put forward for its performance. The exhaust pipe is subjected to a temperature of up to 1000°C, and it is also affected by Cl ˉ , SO4 2- , water, CO, etc., so the materials used must have high resistance to high temperature oxidation and corrosion resistance. Because ferritic stainless steel has good corrosion resistance, high temperature oxidation resistance and low cost, it is widely used in exhaust pipe materials. [0003] The exhaust pipe is mainly welded by gas shielding, and the solid wire welding is easy to cause coarse grains, which reduces the ability of the welded joint to resist intergranular corrosion and high temperature oxidation. In recent years, flux-cored wires have developed rapidly. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/32B23K35/368
Inventor 古丽平吴伦发俞华琴罗茜
Owner 上海焊接器材有限公司
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