Gas shielded welding wireIt is divided into solid wire and flux-cored wire. In our country, solid wire is mainly used, but flux-cored wire is rapidly gaining popularity and has a broad application prospect. Flux-cored wire has advantages such as good welding performance, high welding quality, and strong adaptability to steel. It can be used for welding various steel structures, including low carbon steel, low alloy high strength steel, low temperature steel, heat-resistant steel, stainless steel, and wear-resistant overlay. The protective gases used are CO2 and Ar+CO2, with the former used for general structures and the latter for important structures. Flux-cored wire is suitable for automatic or semi-automatic welding with direct current or alternating current. Next, let's look at the selection of gas shielded welding wire—flux-cored wire.

1. Flux-cored wire for low carbon steel and high strength steel.

There are many varieties and large quantities of flux-cored wires for low carbon steel and high strength steel, most of which are titanium-type slag systems. The welding technology process is good, and the productivity of welding enterprises is high. It can mainly be used in sectors such as shipbuilding, bridges, construction, and vehicle manufacturing in China. In terms of performance, some focus on the performance of the production process system, while others study the performance through weld seams as well as mechanical models and crack resistance. Some are suitable for general positions including downward vertical welding, while others are specialized for corner welds.

2. Flux-cored wire for stainless steel.

Stainless steel flux-cored wire has characteristics such as good process performance, stable mechanical properties, and high production efficiency. In recent years, it has been applied abroad in industries such as petrochemicals, pressure vessels, ships, shipbuilding, and construction machinery. Currently, there are more than 20 types of stainless steel core wires; in addition to chromium-nickel stainless steel core wires, there are also chromium stainless steel core wires. The diameters of the wires are 0.8mm, 1.2mm, and 1.6mm to meet the welding needs of stainless steel thin wrenches, middle plates, and thick plates. Most of the protective gas used is carbon dioxide, but a mixture of Ar+(20%-50%) carbon dioxide can also be used.

3. Wear-resistant overlay flux-cored wire.

To improve the wear resistance of metal surfaces or obtain certain special properties, a certain amount of alloy elements needs to be transferred from the welding wire. With the emergence of flux-cored wires, these alloy elements can be added to the flux-cored wire and are easy to manufacture. In addition, alloy elements can be added to sintering fluxes to obtain solid or flux-cored overlay layers after overlay welding.

Gas shielded welding wire is a welding material that fills metal during the welding process or serves as conductive metal.Gas shielded welding wireThe shape is round or abnormal; that is abnormal. The characteristic of gas shielded welding wire is that an unusual smell may occur during the welding process; this is a normal phenomenon.

In gas welding or tungsten gas welding, the welding wire serves as filling metal to protect the weld; in submerged arc welding, electroslag welding, and other molten gas welding processes, the wire serves as both filling metal and conductive electrode. However, no anti-oxidation flux will be coated on the surface of the welding wire.