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Welding wire prepared from aluminum alloy in use for welding

A technology of aluminum alloy welding wire and chemical composition, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. Poor plasticity and other problems, to achieve the effect of excellent welding process performance, good corrosion resistance, and excellent drawing performance

Inactive Publication Date: 2007-12-26
哈焊所华通(常州)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

3. Poor high temperature plasticity and large linear expansion coefficient
5. The strength of aluminum at high temperature is so low that it cannot support the liquid metal and the weld is poorly formed, and even collapse (or burn through) defects are formed
6. Some aluminum alloys contain alloying elements with low boiling points such as magnesium and zinc. These elements are easily evaporated and burned under the action of high-temperature flames or arcs, thus changing the chemical composition of the weld metal and reducing Properties of Welded Joints
7. When welding aluminum alloys that can be strengthened by heat treatment, due to the influence of welding heat, the mechanical properties of some parts of the base metal near the seam will be reduced
Due to the influence of welding heat, composition segregation or impurity phases often occur on the grain boundary, thereby reducing the corrosion resistance of this area
[0003] When aluminum alloys are welded by fusion welding, the main problems faced are pores in the weld, welding hot cracks, equal strength between the welded joint and the base metal, etc. It can be seen that aluminum alloys are more difficult to weld than ordinary metals

Method used

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Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with embodiment.

[0019] The sample test uses 6061 T6 aluminum plate. The length is 350mm, the width is 150mm, and the bevel and blunt edge are machined in the length direction. The gas is a mixed gas of 30% Ar and 70% He. The welding wire with a diameter of 1.2mm of the present invention is selected, and its chemical composition and mass percentage (%) are composed of: Si: 0.18, Fe: 0.25, Cu: 0.09, Mn: 0.10, Mg: 5.10, Cr: 0.07, Zn: 0.08, Ti : 0.12, the balance is aluminum and other unavoidable impurities. Bead welding method: welding material current (I / A) 160~180, voltage (U / V) 24, current polarity DCRP, welding speed vh (mm / s) 9, 100% visual inspection of the welding sample , X-ray, penetrant testing. The surface of the sample is well formed by visual inspection, the working temperature of the penetrant flaw detection is 20°C, the penetration time of the ZT-YS penetrant is more than 10 minutes,...

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PUM

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Abstract

The invention relates to welding using aluminum alloy welding wire that includes Mg 4.0-6.0wt%, Mn 0.03-0.20wt%, Cr 0.05-0.10wt%, Si less than or equal to 0.25wt%, Fe is less than or equal to 0.40wt%, Cu is less than or equal to 0.20wt%, Zn is less than or equal to 0.20wt%, Be is less than or equal to 0.0003wt%, Ti 0.10-0.15wt%, and the rest is Al and other impurities. The advantages of the invention are stable technology, good extending capacity of welding wire, good welding technology, high intension, and good corrosion resistance.

Description

technical field [0001] The invention relates to an aluminum alloy welding wire for welding. Background technique [0002] Aluminum alloy is widely used in various welding structures and products due to its small specific gravity, high strength, non-magnetic properties, good processing and forming performance, low temperature performance, corrosion resistance and electrical and thermal conductivity, especially suitable for applications with extremely high weight requirements. Harsh aerospace vehicles. The characteristics of aluminum alloy welding are mainly reflected in the following aspects: 1. The affinity between aluminum and oxygen is very high, and aluminum is easily combined with oxygen in the air to form a tight and firm Al 2 o 3 The thin film hinders the melting of the base metal and the good combination between each other, and easily causes slag inclusion. Moreover, the oxide film will also absorb moisture, which will promote the formation of pores and other defec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28
Inventor 李振华居晓锋
Owner 哈焊所华通(常州)焊业股份有限公司
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