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The formula of flux cored welding wire mainly includes various metal powders and chemical substances, which play a key role in the manufacturing process of the welding wire to ensure the quality and performance of the weld seam. The formula design of flux cored welding wire involves multiple elements and compounds, aiming to improve the wear resistance, strength, toughness, and heat resistance of the weld seam. Here are some common formulations and functions of flux cored wire:

Deoxidizer and Denitrifier: In order to purify the filler metal and prevent the formation of pores or embrittlement in the weld metal, strong deoxidizers such as Al powder and weak deoxidizers such as manganese and silicon need to be added to the flux. Self protective flux cored welding wire also requires the addition of AL as a nitrogen removal agent.

Welding slag forming agent: Calcium, potassium, sodium and other silicate substances are used as welding slag (slag) forming agents, which can effectively protect the molten pool from atmospheric pollution when added to the flux, while also making the weld appearance good and cooling quickly.

Arc stabilizer: Sodium and potassium can keep the arc soft and smooth, reduce splashing, and help stabilize the welding process.

Alloy elements: Adding alloy elements such as manganese, silicon, molybdenum, chromium, carbon, nickel, and vanadium can significantly improve the strength, ductility, hardness, and toughness of the filler metal.

Gas forming agent: Adding fluorite, limestone, etc. to self-protection flux cored welding wire to generate protective gas during combustion, which helps with gas protection during the welding process.

In addition, the formula of the flux cored wire can be adjusted according to specific application requirements. For example, to increase wear resistance, materials such as graphene and chromium carbide can be added; To improve heat resistance, rare earth elements and specific alloy powders can be added. The selection and proportion adjustment of these formula ingredients directly affect the performance and application range of flux cored welding wire.