How to choose welding rod, welding wire and flux
Selection of flux must be carried out simultaneously with the choice of welding wire, because of the different combinations of flux and wire, it is possible to obtain different properties or different chemical composition of deposited metal. Flux and wire used for submerged arc welding are usually selected according to the material of the metal being welded and the performance requirements of the weld metal.
Selection of fluxSelection of flux must be carried out simultaneously with the choice of welding wire, because of the different combinations of flux and wire, it is possible to obtain different properties or different chemical composition of deposited metal. Flux and wire used for submerged arc welding are usually selected according to the material of the metal being welded and the performance requirements of the weld metal. The general said on structural steel (including high strength carbon steel and low alloy steel) welding, is used to match the strength of base metal wire; welding of heat resistant steel, stainless steel, is used to match with the composition of base metal wire; welding should be according to the requirements of surfacing technology, using the properties of selected alloys system and similar components of welding wire. Then choose the welding flux which is suitable for the product structure and can be well matched with the welding wire. In addition to the steel grades, the welding technology requirements and welding process factors should be taken into account when selecting the flux. Because of the different types of flux process performance, crack resistance and anti porosity performance is different. For example: welding of low alloy steel and high strength low temperature toughness good, it should be selected with high basicity flux, narrow groove butt welding thick multi-layer welds, should choose the good performance of the slag removal flux.
