Application of Taguchi method and ANOVA analysis for optimization of process parameters and exothermic addition (CuO-Al) introduction in the core filler during self-shielded flux-cored arc welding

摘要: The main factors affecting the mechanical properties of deposited metal in arc hardfacing are primarily chemical composition and cooling rate. latter depends on filler materials composition, condition (mode), technology, determining geometric parameters welded bead shape, amount dilution with base metal, introduced heat. goal this work is to analyze effect exothermic addition introduction core welding weld morphology, thermal indicators, metal. Fe-C-Cr-Cu-Ti-V-Al alloying system was used. Taguchi technique adopted as experimental plan design, follows: orthogonal array L9 (3 ^ 4) signal-to-noise ratio (S/N). analysis variance (ANOVA) also applied for determination variables contribution dependent parameters. Application method simpler, more efficient, quicker. It requires fewer experiments determine optimal values studied variables. Microstructural studies using an optical microscope were additionally performed individual samples best properties, each flux-cored wires. We determined that CuO-Al had a significant such indicators morphology reinforcement height form factor (WRFF). Introduction (CuO-Al) current (I), heat input rate (HIR), microhardness. voltage (Р(Ua) = 45.8 %) greatest influence microhardness value, while percentage (P (EM) 26.9%) wire feed (WFS) 21.5%) smaller effect. shown it important take into account complex parameters, variation (WRFF) characteristics (HIR) order optimize conditions (introduction addition). According results article, value most correlated average