Estudo da usinabilidade do aço-carbono SAE AISI ressulfurados com base no teste de composição química

Abstract

The machinability is defined by several authors as being a greatness of ease or difficulty that a material possesses to be machined. The importance of knowing more about materials relationship with this greatness is relevant to the fact that in products production costs involving the machining can reach a superior mark to 50%. The aim of this work is to know the machinability of SAIS AISI carbon steels based on the chemical composition test developed by Czaplicki, knowing the chemical compositions of each material and the contents that compose them, demonstrating their influence on the indexes of machinability of each material chosen for this study. With the materials definition, knowing the additions ranges and the percentage contents present in each steel, a database can be assembled for application of the composition test. For application of the data in the test of chemical composition equation were used softwares, as instance, Matlab to obtain results with greater precision, and Excel for generation of organized and precise graphs, being possible to perceive larger additions of carbon and manganese, this in quantity not proportional to the contents of sulfur for a better combination of manganese sulfide become detrimental to machinability indices, with the controlled inclusion of beneficial phosphorus to the desulphurized carbon steels machinability