Peculiarities of structure formation of steel carbon wire of perlite class after a combined deformation processing

Abstract

Creation of methods of metals and alloys deformation nanostructuring, which could be adapted into existing industrial plant by their technological parameters and productivity, is one of actual problems to be solved at present by researchers.Description of a wire combined deformation processing bydrawing with bending and twisting presented. Results of metallographic study of high-carbon wire of Stal 70 grade steel indicated specific peculiarities of influence of different kinds of plastic deformation combining on the steel structure. Mechanical tests of the wire after different kinds of combined processing showed, that such a processing provides combination of strength and ductility, typical for a steel with ultrafine grain structure. Using a method of differential scanning calorimetry, the stored energy value and calorimetric peak temperature value of deformed wire made of high-carbon Stal 70 steel determined. It was shown, that the stored energy value and calorimetric peak temperature value are sensitive to technological parameters of combined deformation processing change.