Development of Models for the Prediction of Mechanical Properties of Rolled Ribbed Medium Carbon Steel

Abstract

The target of the contribution is to outline possibilities of applying modelling for the prediction of mechanical steel properties of ribbed medium carbon steel rods. The impact toughness; tensile properties - tensile strength at maximum load, tensile strength at break and yield strength; as well as hardness property of medium carbon steels rolled from inland rolling mills were determined experimentally and quantitatively. The experimental data obtained were used to develop models using stepwise techniques (statistical analysis). The precise tool used for development of these models was multiple regression analysis (Analysis of Variance- ANOVA) and the models were used to obtain the predicted (numerical) values of these properties for each of the materials investigated. The outcome models enable the prediction of mechanical properties of the material on the basis of decisive parameters influencing these properties. Both the experimental and calculated (numerical) values of these properties were subjected to statistical tests namely, paired t-tests, correlation coefficient, standard error, standard deviation and variance; which were found valid within the limit of experimental error.. By applying modelling that are combination of mathematical and physical analytical methods it will be possible to lower the manufacturing cost,  environmental costs and enable the users of the products to also confirm the predicted properties easily before use.