Optimization of Abrasive Wear Performance in TiC-Reinforced AISI 316 Wire Arc Additive Manufacturing Claddings on Agricultural Steel via Response Surface Methodology
摘要
This study investigates the abrasive wear performance of titanium carbide (TiC)-reinforced AISI 316 austenitic stainless-steel claddings deposited on 080M40 medium-carbon steel substrates via Wire Arc Additive Manufacturing (WAAM). Composite clads with 0%, 5%, and 10% TiC were fabricated and evaluated for their microstructural, mechanical, and tribological characteristics. Microstructural examination revealed a dual-phase morphology comprising dendritic and equiaxed grains, with enhanced grain refinement and uniform TiC dispersion at higher reinforcement levels. The clad containing 10 wt.% TiC (AST10) exhibited an 88% increase in microhardness (429 HV) compared to the base steel and demonstrated improved metallurgical bonding at the clad–substrate interface. Under dry abrasive wear conditions, AST10 showed a 60% reduction in mass loss in the dry sand rubber wheel test and a 55% reduction during pin-on-disk testing, confirming superior wear resistance. Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) revealed that normal load, abrasive particle size, and sand flow rate significantly influenced wear performance, with optimal wear resistance achieved at low load, fine particle size, and higher sand flow rate. The findings affirm that TiC-reinforced WAAM claddings are a promising surface engineering approach for enhancing the durability of components operating in abrasive and agricultural environments.