Влияние способа реализации небольшого обжатия конечного на механические свойства и усталостная прочность проволок из угольной стали

Abstract

The proper technology of wires manufacture can cause the increase theirs fatigue strength. The rope wires from high carbon steel must have high suitability for working in complex state of variable stresses. The fatigue strength of wires depends on residual stresses. The application in wire drawing process the small reduction (1÷3%) in last draft is one of the methods which makes enable to decrease of residual stresses. In the work the analysis of the drawing process realized according to three schemes i.e. drawing with small final reduction in additional draft, drawing by two dies in tandem configuration and conic bearing part has been analyzed. The variants mention above were compared to conventional drawing variant. It has been proved that the method of realization of small final draft in drawing process influences on the improvement of fatigue strength and do not causes the essential changing of mechanical properties of drawn wires. The proper drawing variant of high carbon steel wires with small final reduction has been determined.