Abstract
The oxy-acetylene flame hardening is one of the surface structure modification process is also known as heat treatment process. Using of high pressure oxy acetylene gas mixture expose to the top surface of the material with around 30,000 C, and the material comes to recrystalization temperature at that time the work samples is cooled by means of sudden water quenching. This action changes the micro structural and to increase the micro hardness of the material. The low carbon steel material is selected for this investigation to improve the micro hardness value by the application of oxy-acetylene flame hardening. The increasing of hardness with the effects of flame hardening parameters are flame temperature in o C, torch cap in mm, and quenching period in sec. Taguchi L27 OA is consider for this experiment to evaluate the maximum microhardness values of specimens effectively. The factors influencing for this study is estimated through Signal to Noise ratio efficiently.
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