Создание непрерывного метода деформационного наноструктурирования проволоки на основе совмещения операций

Abstract

Low technological effectiveness, limitedness of work blank dimensions, need of creating of special equipment and rigging, complexity of incorporation in existing industrial technological processes of hardware production pose to urgent problem in creation of deformation nanostructuring continuous method which according to its technical and technological characteristics would be compatible with the existing processes of metallurgical and metal wire productions. Highly carbonaceous wire was selected as the subject of studies, since it is the claimed form of metal wire production and the formation of ultrafinegrain structure in it is one of the directions of improving its performance properties. The essence of developed approach concludes the simultaneous imposition on continuously moving wire the dilitational strain wire drawing, the bending strain in transit through system of rollers and twisting strain. The claim for invention is given to the developed method, priority information is obtained. The results of conducted metallographic investigations showed that such deformation action combination on wire made of high-carbon steel 75 leads to crushing of its separate structural components, which size becomes less than 1000 nm, so it makes possible to classify the obtained structure as ultrafine-grain. As a result conducting mechanical tests it is established that the simultaneous action on high-carbon steel of dilitational strains and twisting leads to an increase of wire strength and plastic properties. The uniform microhardness distribution by wire section makes it possible to judge the uniformity of obtained structure and properties.