Plating aluminium welding wire for carbon dioxide arc welding and preparation method thereof

Abstract

The invention discloses a plating aluminium welding wire for a carbon dioxide arc welding and a preparation method thereof; a magnesium titanium alloy layer is plated on the surface of the welding wire by a hot-dipping method. As the surface plating layer of the prepared welding wire contains metal elements such as aluminium, magnesium, titanium and the like, the welding wire can reduce splash and increases the welding quality in the premise of ensuring the electrical conductivity; in the preparation method, the hot-dipping method is adopted for cladding material and can avoid the pollution brought by about the traditional coppering technique.

Description

technical field [0001] The invention relates to a welding wire for carbon dioxide gas shielded welding and a preparation method thereof, more specifically, to a welding wire without copper plating on the surface of the welding wire and a preparation method thereof. Background technique [0002] With the introduction of automatic welding systems, welding wires for CO2 gas shielded arc welding have been widely used in many fields, such as steel structures, automobiles, ships and buildings. For welding wires for CO2 gas shielded arc welding, so-called copper-coated solid wires are usually used, in which copper is plated on the surface of the wire. The following problems exist in the use and preparation of copper-plated welding wire: [0003] (1) The copper plating layer is softer than the surface of the welding wire. Due to the friction between the welding wire and the welding tip, the copper plating is inevitably peeled off from the surface of the welding wire, thus making th...

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Problems solved by technology

[0003] (1) The copper plating layer is softer than the surface of the welding wire. Due to the friction between the welding wire and the welding tip, the copper plating is inevitably peeled off from the surface of the welding wire, thus making the welding unstable

[0004] (2) The melting point of copper is low, and it is easy to evaporate under the ultra-high temperature of the welding process, resulting in a large amount of smoke

[0005] (3) During the welding process, due to the friction between the welding wire and the welding tip, the copper powder falls off the surface of the welding wire and accumulates on the welding tip, which will cause the welding tip to be blocked, resulting in unstable welding and a large amount of spatter

[0006] (4) Copper plating on the surface of welding wire will produce a large amount of waste liquid, causing environmental pollution

Chinese patent "A Welding Wire for Gas Shielded Welding" (Application No. 200320129174.5, date of authorized announcement on December 29, 2004) discloses a wire with longitudinal grooves or small pits on the surface of the wire, and an activator arranged in the longitudinal direction. In grooves or small pits, at this time, the activator is unevenly distributed on the surface of the wire, resulting in instability of the welding process and a decrease in welding quality

[0008] The above wires have been modified to non-copper-coated wires, but do not meet all the required properties of the wire

In particular, in the case where the surface of the wire is coated with fine powder in order to improve the performance of the non-copper-coated wire, the powder coated on the surface of the wire inevitably causes the generation of smoke

Moreover, since it is difficult to control the coated powder at an appropriate level, the powder coated on the wire surface is not uniform, thereby increasing the amount of spatter

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