What are welding materials?

What are welding consumables? What do they include? Answer: Welding consumables include electrodes, welding wire, flux, gas, electrodes, and grounding.

What is welding wire? Answer: A metal wire that serves as both filler metal and conductor during welding is called welding wire. It comes in two types: solid wire and flux-cored wire. Commonly used solid wire type: ER50-6 (brand: HO8Mn2SiA).

Do MAG welded joints have higher impact toughness than CO2 welded joints? Answer: In MAG welding, the active gas flame is 20%. Why does the alloying element in the welding wire have a high joint coefficient and high impact toughness? In CO2 welding, the active gas is 100%. The manganese and silicon alloying elements in the welding wire are combined for deoxidation, resulting in a slightly lower alloying element transition coefficient, resulting in higher impact strength than MAG welded joints. For example, Tangshan Kobelco's MG-5IT welding wire is equivalent to ER50-6. Its room temperature impact strength value is: MAG: 160I; CO2: 11OJ.

What is flux-cored welding wire? A: A type of welding wire made by rolling a thin steel strip into a round steel tube, then filling it with a specific flux powder composition and drawing it.

A: Flux-cored welding wire is categorized into two types based on shielding: flux-cored gas-shielded welding wire and flux-cored self-shielded welding wire. Flux-cored gas-shielded welding wire generally uses CO2 gas as a shield, and is a combined gas-slag type, resulting in good weld formation and high overall mechanical properties.

A: Because flux-cored welding wire is a tubular wire rolled from a thin steel strip, it is a seam-forming wire. Moisture in the air can penetrate the flux core through the support, preventing the flux from being absorbed, resulting in indentations and pores in the weld.

Are there any technical requirements for CO2 gas purity? A: CO2 gas is generally a byproduct of chemical production, with a purity of approximately 99.6%. Why would trace amounts of excess gas and moisture cause defects such as pores in the weld? For welding critical products, CO2 gas with a purity of 299.8% should be used. This prevents weld pores, has low hydrogen content, and offers excellent crack resistance.