Optimizing the Co2 Laser Parameters to Attain the Minimum Wear Rate in Cobalt Based Hardfaced Surfaces
Keywords:
Optimizing, RSM, Stellite-6, Laser Hardfacing, Wear Rate, AISI 304 SS.Abstract
The laser hardfacing is carried out by CO2 laser. AISI 304 stainless steel is used as the base metal and Stellite- 6 cobalt based powder is used as hardfaced material. In this Investigation an attempt has be made to optimizing the process parameters of laser hardfaced surfaces such as Laser Power (P), Travel Speed (T), Defocusing Distance (D) and Powder feed rate (F). The influence of the processing variables on wear rate is discussed. The experiments were conducted using design matrix based on a four factor and five level central composite rotatable design. An empirical relationship was developed to predict the Wear Rate of Cobalt-based (Stellite-6) hardfaced layer using Response Surface Methodology (RSM) technique. The optimized parameters and the influenced parameter were identified. The interaction effects of input process parameters of laser hardfacing were discussed.
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