Acta Technica Corviniensis

ACTA TECHNICA CORVINIENSIS – BULLETIN of ENGINEERINGoutline values, we can establish the desiredvalue of the mechanical feature, for any contentof an element found in the chemicalcomposition. We can also establish the bestvariation fields of these elements, varying withthe desired values of the studies parameter.EXPERIMENTAL DATESThe numerical studies had as starting point thedriving experimental testing at heat, made onshares of test-bars drawn out of a number of 50charges of OLT 45K steel, endorsed into anelectrical oven equipped with a spring, whosechemical composition is presented in [1] paper.Fig.2 The variation of the technical running limitR p0,2/450 , containing manganese and silicium, takinginto consideration the medium percentage of carbonFig.1 The shape and size of test-bars used in testingThree test-bars have been tried for each charge,their shape and size being shown in fig.1.ESTABLISHING THE NUMERICAL STUDIESBy using the experimental dates obtained afterlaboratory testing, it went forward toestablishing some graph correlations, usingMATLAB 5.0 programme. Files with experimentaldates and those obtained by the rolling of theused programmes, can be found in [1] paper.The numerical results, obtained by rolling theprogramme are sizable, for which they are notpresented in the paper. Then, the graphsobtained by mathematical pattern-making of theresults.Fig.3 The variation of the technical running limitR p0,2/450 , containing carbon and silicium, taking intoconsideration the medium percentage of manganese322008/ACTA TECHNICA CORVINIENSIS/Tome I