OPTIMIZING THE LASER PARAMETERS TO ATTAIN THE MAXIMUM HARDNESS IN COBALT BASED (STELLITE - 6) HARDFACED SURFACES
| Author(s) | : | A. Umesh Bala, Dr.R. Varahamoorthi |
| Institution | : | Research Scholar, Department of Manufacturing Engineering, Annamalai University, Tamil Nadu, India |
| Published In | : | Vol. 4, Issue 11 — November 2017 |
| Page No. | : | 959-968 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Laser Hardfacing are naited mainly to improve the service life of engineering components either rebuilding orfabricating in such a way to produce a composite wall section to wear, erosion, corrosion, etc. The main characteristics ofCO2 laser hardfaced surfaces are good metallurgical bonding, low heat input and less dilution. In this paper, a provare hasbeen made to optimize the process parameters of laser hardfaced surfaces such as Laser Power(P), Travel Speed(T),Defocusing Distance(D) and Powder feed rate(F).The optimization of laser hardfaced surfaces have good productdevelopment, value annexation, revive and restoration. The laser hardfacing is carried out by CO2laser by coaxial - powderfeeding method. Inthis hardfacing process AISI 304 stainless steel is used as the base metal and the cobalt basedStellite 6powder is used as hardfaced material. The influence of theprocessing variables on hardness is bespeaked for optimizedcondition. The experiments were conducted based ona four factor and five level central composite rotatable design. Themathematical model wasdeveloped using Response Surface Methodology(RSM) technique to predict the hardness. Theinteraction effects of input processparameters of laser hardfacing were discussed. The optimized process parameter for laserhardfacing and the influenced parameterwere identified.
A. Umesh Bala, Dr.R. Varahamoorthi, “OPTIMIZING THE LASER PARAMETERS TO ATTAIN THE MAXIMUM HARDNESS IN COBALT BASED (STELLITE - 6) HARDFACED SURFACES”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 11, pp. 959-968, November 2017.
