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Anti-fatigue high toughness aluminum alloy welding wire for city rail train

A technology of aluminum alloy welding wire and urban rail trains, which is applied in the direction of welding medium, welding equipment, metal processing equipment, etc., can solve the problems of unfavorable high-speed train operation safety, poor toughness and fatigue resistance, etc., and achieve good welding seam refinement effect , Improve the strength and toughness, and the effect of fine weld structure

Inactive Publication Date: 2017-08-22
安徽飞弧焊业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main materials used in aluminum alloy car bodies of urban rail trains are Al-Mg, Al-Mg-Si, and Al-Zn-Mg alloys. When ordinary ER5356 and ER5183 welding wires are used for welding, the joint strength is often only the strength of the base metal. 60%-70% of that, poor toughness and fatigue resistance, which will be detrimental to the safety of high-speed train operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A fatigue-resistant high-toughness aluminum alloy welding wire for urban rail trains proposed by the present invention has the following components in mass fraction: Mg: 0.6%, Si: 0.65%, Fe: 0.25%, Zn: 0.3%, Mn: 0.5% , Cr: 0.15%, Cu: 0.2%, Ti: 0.15%, Sr: 0.03%, Mo: 0.3%, W: 0.1%, V: 0.6%, Nb: 0.05%, Zr: 0.35%, Sc: 0.1% , Er: 0.15%, Ce: 0.04%, Y: 0.06%, Gd: 0.02%, and the rest are Al and unavoidable impurities.

Embodiment 2

[0017] A fatigue-resistant high-toughness aluminum alloy welding wire for urban rail trains proposed by the present invention has the following components in mass fraction: Mg: 1%, Si: 0.5%, Fe: 0.4%, Zn: 0.2%, Mn: 0.7% , Cr: 0.08%, Cu: 0.35%, Ti: 0.1%, Sr: 0.06%, Mo: 0.1%, W: 0.2%, V: 0.4%, Nb: 0.12%, Zr: 0.15%, Sc: 0.22% , Er: 0.06%, Ce: 0.08%, Y: 0.02%, Gd: 0.06%, and the rest are Al and unavoidable impurities.

Embodiment 3

[0019] A fatigue-resistant high-toughness aluminum alloy welding wire for urban rail trains proposed by the present invention has the following components in mass fraction: Mg: 0.8%, Si: 0.58%, Fe: 0.32%, Zn: 0.25%, Mn: 0.6% , Cr: 0.12%, Cu: 0.28%, Ti: 0.12%, Sr: 0.04%, Mo: 0.2%, W: 0.15%, V: 0.5%, Nb: 0.09%, Zr: 0.25%, Sc: 0.16% , Er: 0.1%, Ce: 0.06%, Y: 0.04%, Gd: 0.04%, and the rest are Al and unavoidable impurities.

[0020] Among them, the welding process parameters are as follows: the flow rate of argon gas is 16.5L / min, the welding voltage is 25V, the welding current is 215A, and the welding speed is 4mm / s.

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PUM

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Abstract

The invention discloses an anti-fatigue high toughness aluminum alloy welding wire for a city rail train. The anti-fatigue high toughness aluminum alloy welding wire comprises the following mass fraction components of Mg, Si, Fe, Zn, Mn, Cr, Cu, Ti, Sr, Mo, W, V, Nb, Zr, Sc, Er, Ce, Y, Gd and the balance Al and inevitable impurities. The anti-fatigue high toughness aluminum alloy welding wire for the city rail train is reasonable in component, electrical arc stability is good at the time of welding, a formed welding seam is attractive, the strength of bonding of the welding wire with a parent metal is high, performance is stable, a welded joint has high strength and high toughness, and anti-fatigue performance is excellent.

Description

technical field [0001] The invention relates to the field of welding wire technology, in particular to a fatigue-resistant high-toughness aluminum alloy welding wire for urban rail trains. Background technique [0002] Aluminum alloy has good specific strength, corrosion resistance and electrical and thermal conductivity, as well as excellent formability and weldability. It is widely used in aerospace, marine automobile, machinery manufacturing, military chemical industry and other fields. With the continuous development of life and the national economy, the selection of materials is continuously optimized. On the premise of meeting the requirements of use, replacing steel materials with aluminum alloys is of great significance for reducing the weight of the train itself and reducing energy consumption. At present, the main materials used in aluminum alloy car bodies of urban rail trains are Al-Mg, Al-Mg-Si, and Al-Zn-Mg alloys. When ordinary ER5356 and ER5183 welding wires ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28
CPCB23K35/288
Inventor 卢齐元
Owner 安徽飞弧焊业股份有限公司
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