Effect of temper rolling on tensile properties of C-Mn steels

Abstract

The tensile properties of two C-Mn steels TR1 (Fe-0.135C-0.66Mn) and TR2 (Fe-0.019C-0.18Mn) under different temper rolling conditions were investigated. It was found that the lower yield strength and ultimate tensile strength of steels TR1 and TR2 which were temper rolled at different reductions can be expressed by the following formula, σ(MPa)=σ⁰+Kϵ_eq(%), where σ is the strength after temper rolling; σ⁰ is the strength without temper rolling; ϵ_eq is the equivalent strain of the temper rolling reduction; K is a constant. The uniform elongation and the total elongation of these two steels which have been temper rolled at different reductions (or equivalent plastic strains) are those of samples without temper rolling subtracted from their equivalent plastic strains. The work hardening exponents of temper rolled samples can be predicted using the tensile curves of the samples which have not been temper rolled. Very good agreement between the experimental results and the calculated data was obtained.