Effect of hard faced Cr-alloy on abrasive wear of low carbon rotavator blades using design of experiments

Abstract

Aversive wear of tillage tool is major problem faced all-over the world. The surface modification techniques are used to improve surface properties of target surface. Hard-facing is effective technique for enhanced the surface properties of tillage tool and metallic components. The performance of tillage tool and quality of work are highly influenced by the aversive wear. In the present study the wear resistance of modified and regular rotavator blades in laboratory and in actual working field of sandy soil. Hardfacing is used as surface modifying technique and Cr based electrode are used for the investigation. Experimentation has conducted to evaluate the effect of chromium alloys on mechanical properties of base material. Addition of chromium increases the surface hardness of blades. ASTM G-99 standard wear testing method is used to study wear resistance of modified and regular blades. Taguchi L9 array of to optimize the laboratory investigation used in present work. Wear performance of unhardfaced and hardfaced blades is examined after fixed interval of time in term of weight loss. The wear rate in the field tests was found to be significantly different statistically than laboratory test run. Hardfaced blades shows higher wear resistance then regular blades of rotavator.