The effect of rolling and additional heat treatment on the structure and strength properties of steel EI-961SH

Abstract

In this paper, the influence of various temperature conditions and the degree of deformation on the structure and strength properties of ferritic-martensitic steel EI-961SH, subjected to rolling and additional heat treatment, is investigated. As a result of rolling, a bimodal band structure is formed with the distribution of Sg23C6 carbide particles along the grain boundaries. When applying additional heat treatment, the distribution of carbide particles formed during rolling is preserved. An increase in the microhardness value by 34 % and the limit of the temporary fracture resistance by more than 50 % compared to the standard heat treatment was obtained.