Estudo da relação C/A em aços com diferentes teores de carbono temperados em água.

Abstract

A water-tempered crystal structure is widely accepted to be Tetragonal Center Body, having the parameters ratio related to the carbon concentration in the steel composition. This ratio increases as carbon levels also increase. This relationship is given by a classical model as given by the expression c / a = 1 + 0.0467% wt C. However, it is known that this tetragonality will only appear from a certain concentration of approximately 0.6% of carbon contained in the material. In this paper, the effect that carbon exerted on a tempered steel structure with different carbon contents is studied. A heat treatment was performed in the samples at a given temperature of 950 ° C for 1 hour followed by a quick cooling in water. Through a metallographic analysis, it was possible to identify the presence of martensite in the material and along with an x-ray diffractometer using the values obtained from the diffraction peaks it was possible to calculate the network parameters of the crystalline structure of the unit cell and thus we obtained the c/a samples ratio values and thus made the comparison with the relation proposed in the literature by. (SHERBY et al., 2007) that turned out to be correct.