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Analysis of medium manganese steel through cold-rolling and intercritical annealing or warm-rolling

2018; Maney Publishing; Volume: 35; Issue: 17 Linguagem: Inglês

10.1080/02670836.2018.1463613

1743-2847

Aline Silva Magalhães, Carlos Eduardo dos Santos, Aline Oliveira Vasconcelos Ferreira, Davi Silva Alves, Dagoberto Brandão Santos,

Metal Alloys Wear and Properties

Medium manganese steel is typically fabricated from hot-rolling followed by cold-rolling and intercritical annealing processes. However, a singular process, warm-rolling, is an appealing prospect. The microstructure, mechanical properties and texture of a 8 wt-% Mn–0.08 wt-% C steel was investigated by cold-rolling followed by intercritical annealing or warm-rolling. The product from both processes exhibited a highly refined microstructure as well as a large volume fraction of austenite. However, a slightly larger volume fraction as well as a more heterogeneous austenite morphology resulted from the warm-rolling process, associated with a higher work-hardening rate. Microstructural analysis revealed intense α-fibre components due to a higher strain following the warm-rolling process as well as a considerably high-angle grain boundary number which was associated with dislocation accumulation. This paper is part of a Thematic Issue on Medium Manganese Steels.