Surface Modification Of Low Carbon Steel In Laser Cutting

Luei , Hong Keat (2009) Surface Modification Of Low Carbon Steel In Laser Cutting. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Laser cutting is an advanced machining which becoming important for the industrial application. The machine can do its jobs faster, more accurate and more complex shape than other conventional machine and can machine a lot of materials available. The demand of the modern material with high hardness leads to more difficult for machining, laser cutting hereby solve the problems of this. In the research, surface modification of the low carbon steel will be identify and observed after machining. By using sets of parameters with different cutting speed and laser output power, the impact of this parameter on the surface of cut will be investigate. Firstly is to do surface roughness test on the machine surface of each samples. Then the sample will be mounted on epoxy to be grind and polish, before observation under microscope, the sample undergoes etching. Finally the cut surface grain structure is observed for microstructure changes of size. Machine which in used for the experiment will be all located in the laboratory. In the experiment, roughness test shows that the surface cut with the higher speed will have higher value of roughness but when the speed is lower it will affect more heat to be transfer on the material and causing heat affected zone to be increase in the size on the surface. In other explanation will be the spreading of heat during laser decrease as the laser beam does not stay longer a location.

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