Determination of the Optimal Parameters for Core Laminated Shielding Welding Filler Metal and Slag Heap Welding
Core laminated shielding welding is a semi-automatic welding process that uses a wire lamination shield cored by an electric charge to additively weld components within a specific area. It is widely used for welding parts in the automotive industry, especially for complex parts. Core shielding welding includes filler metal, flux, current, etc. In order to effectively realise the automated welding process for today’s increasingly complex parts, it is essential to determine the optimal parameters for the core shielded shielding welding process.
Welding metal and flux play an important role in the welding process. The welding metal provides the welding metal properties such as strength, plasticity and corrosion resistance. The flux controls liquid metal droplets, slag formation and protects the weldment from oxidation during welding. In core laminated shielding welding, the materials used as the welding metal and flux are mainly metal and slag mixtures. Different types of metals and fluxes have different characteristics, making it necessary to determine the best combination of filler metal and flux to meet the welding requirements.
In the welding process, the welding current is also important. The welding current generates heat and transfers the heat to the weldment, thus forming the molten pool and controlling the arc to achieve high-speed welding. The welding current determines the welding penetration, welding speed, arc stability and other factors, which will have a direct impact on the quality of the core laminated shielding welding. Different filler metal and flux have different requirements for the welding current, and the welding parameters, such as voltage and welding speed, need to be adjusted according to the requirements.
In addition, the slag heap is also an important factor in the welding process. Slag is a by-product of the welding process and is formed on the surface of the molten pool. The slag heap has the characteristics of molten pool protection and cleaning, which can avoid the fusion, splashing and oxidation of the molten pool, and have an important effect on the welding quality. The slag heap parameters include the amount of slag heap, the required heap time and the degree of penetration into the slag heap. The slag heap parameters should be adjusted according to the welding requirements.
In sumthin, there are three important parameters that need to be determined for core lamination welding: filler metal, flux and welding current, as well as the parameters for the slag heap. In order to determine the optimal parameters for the core lamination welding process, the materials used need to be tested, compared and analysed. The welding current, welding parameters and slag heap parameters should be adjusted according to the welding requirements. The welding parameters should be determined through comprehensive factors such as behaviour of welding layer, welding speed and weldment’s mechanical property.
