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Types and Selection of Submerged Arc Welding Flux
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Release Date:
2022-07-04
Solder fluxes for submerged arc welding can be classified according to their intended applications into fluxes for ordinary carbon steels, low-alloy steels, and stainless steels. Based on manufacturing techniques, fluxes are mainly classified into direct-sintering fluxes and smelting fluxes. As users of submerged-arc welding fluxes, it is essential to first analyze and compare the characteristics of various fluxes based on their intended applications, so that selecting the most suitable flux for one’s specific needs becomes straightforward in submerged-arc welding.
Sintered Submerged Arc Welding Flux SJ101
SJ101 is alkalinity of about 1.8 Fluorine-based flux. This flux exhibits excellent soldering process performance, producing aesthetically pleasing weld beads that are easy to clean of slag, even in deep grooves and narrow gaps. It exhibits excellent desulfurization capability, resulting in low sulfur and phosphorus content in the weld metal and high low-temperature impact toughness. Low diffusible hydrogen content and excellent crack resistance. Its drawback is that gas porosity easily forms on the weld surface.
Sj101q Sintered Submerged Arc Welding
SJ101Q It is a fluorine-alkali flux for bridge applications. SJ105Q The oxygen content of the flux is tightly controlled, and its active ingredients are relatively few. This type of flux has been used in “ Beijing–Shanghai High-Speed Railway ” Bridge welding.
Sj301 Sintered Submerged Arc Welding
Sintering agent SJ301 It is a neutral silicon-calcium type. This solder can be used with direct current, with the welding wire connected to the positive terminal of the DC power supply. The arc is stable, the weld bead has a good appearance, and slag formation is easy. Molded metals exhibit excellent mechanical properties. Particularly suitable for various circumferential seams, with short slag and no spatter during welding. It can be used for welding pressure vessels such as steel cylinders.
SJ501 Sintered Submerged Arc Welding Flux
Sintered flux SJ501 It is an aluminotitanate flux. This flux is characterized by its suitability for high-speed welding, with no undercut or porosity, and excellent resistance to porosity.
Melted Submerged Arc Welding Flux
Molten solder It is a smelting-type, high-manganese, high-silicon, low-fluorine solder. Brown to pale yellow, glassy particles. The particle size range is 8-40 Single-stage. It can be connected to the positive terminal using AC or DC welding, and exhibits excellent weldability.
Stainless Steel Submerged Arc Welding Flux
Sintered flux It is an alkaline sintered flux for stainless steel and heat-resistant steel, with an alkalinity of approximately 1.8。 Round particles. Particle size is 10-60 Eye. When DC When the power supply is used for welding, the welding wire is connected to the anode. The arc is stable, and the weld bead has a beautiful appearance. When welding stainless steel, carbon gain is minimal, and chromium burn-off is low. Particularly suitable for welding low-carbon and ultra-low-carbon stainless steels.
Submerged Arc Welding Flux for Stainless Steel Melting
The submerged arc welding flux is a low-manganese, high-silicon, high-fluorine flux. Brown to pale yellow, glassy particles. The particle size range is 8-40 a level. Can be adopted to交 - DC welding with the weld wire connected to the positive terminal delivers excellent welding process performance.
We believe that, based on the above description, you now understand the materials used in the submerged arc welding process. 90 % of flux types, and choosing the right flux for you is no longer difficult.
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