Research on flow behavior of 30CrMnSiA during current-assisted plane strain compression deformation

Abstract

Alloy structural steels with good fatigue and mechanical properties are widely used in transmission parts of industrial fields. However, alloy structural steels are difficult to deform at room temperature due to the low ductility and large deformation resistance. Current-assisted flow spinning (CAFS) is one of the most promising methods for manufacturing cup-shaped parts made of difficult-to-deform metals. The current assisted plane strain compression (CAPSC) test was proposed as the physical simulation test for CAFS, and the air cooling method was used to eliminate the effect of Joule heat. The CAPSC tests and the FE simulations of 30CrMnSiA were carried out, and the influences of peak current density and duty ratio on flow behavior were analysed. The results show that the constructed CAPSC test setup can be used to avoid the generation of the Joule heat effectively. The flow stress under pulse current is lower than that of without pulse current, and decreases gradually with the increasing of duty ratio and peak current density; the strain hardening exponent under pulse current is higher than that of without pulse current, and increases with the increasing of duty ratio and peak current density.