Thermodynamic Welding Reaction Coefficient
The thermodynamic weld reaction coefficient describes the equilibrium reactions between the weld pool and slag or shielding gas. It helps predict alloy burn-off and gas absorption.
Physical-Chemical Mechanism of Action
The Thermodynamic Welding Reaction Coefficient (TSRK) is a physical parameter that quantifies the chemical reactions in the weld pool. It describes how alloying elements change in the gases or slag and which gases are absorbed into the weld pool.
Metallurgical Relevance & Risks in Welding
The TSRK is crucial for controlling welding processes. An inaccurate prediction can lead to alloying losses, which impairs the strength and toughness of the weld. Gas absorption can change the microstructure and lead to hot cracks or grain coarsening.
Workshop Practice & Action Instructions
To use the TSRK correctly, you need to know the melting temperature, shielding gas pressure, and alloy composition precisely. If gas absorption increases (e.g., CO2), reduce the temperature or adjust the shielding gas. If alloy burn-off is too high, increase the filler metal feed rate.