Efeitos do corte por laser sobre a integridade superficial de um aço médio carbono

Abstract

A condition of the manufacturing process is the need to get processed parts, characterized by good quality surface finish, low roughness and the conservation of its metallurgical properties. These conditions have motivated the design of this study, in which we selected the materials processing laser for cutting steel ABNT 1045, joining a technology to a metal widely used in industry. Moreover, the versatility and advantages, as well as the overall trend of the industry have become important factors in the use of laser as the cutting process. In the present study investigated the effects of varying the cutting power, cutting speed and pressure of assist gas in machining by continuous CO2 laser on the quality of the cut, where several analyzes were performed using the statistical planning experimental. After obtaining the samples are burrs, roughness, the perpendicularity, the heat affected zone, the microstructure of the material and finally the hardness of the region obtained by laser cutting were analyzed. Based on these data were constructed factorial arrangements, using the methodology of experimental design in order to assess the degree of influence of the parameters and their possible interactions and thus determine their statistical significance. Despite the complexity of the effects and interactions of the parameters involved, the results corroborate that the improvement of laser cut steel ABNT 1045 process may be feasible.