Residual stress analysis and warpage control of 0Cr17Ni7Al spring steel wire

Abstract

In order to solve the problem of residual stresses in the drawing process of 0Cr17Ni7Al spring steel wire and the rebound phenomenon after the wire curling, the effects of drawing process parameters on residual stresses and wire warpage were analyzed through a combination of experimental observation and finite element simulation. Subsequently, a quantitative relationship model between the residual stresses and warpage was constructed. The results indicate that the axial plastic deformation of the wire coil during the winding process is the primary cause of warpage, and the distribution characteristics of the residual stress have a pronounced impact on warpage. By adjusting the drawing parameters, the warpage can be effectively controlled. The accuracy of the relationship model between warpage and residual stress is as high as 0.97. The research result deepens the understanding of the influence of residual stress in the drawing process, and provides technical reference for the subsequent processing and application of the steel wire.

Keywords

• ferrous metals and their alloys; 0cr17ni7al spring steel wire; residual stress; drawing process; warpage; finite element simulation