High Manganese Steel Essay

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For the past two decades, more research efforts have been focused on the development of Advanced High Strength Steels (AHSS). The AHSS include Dual Phase (DP) steels, [1–10], High Strength Low Alloy steels (HSLA), Transformation Induced Plasticity (TRIP) steels, Twinning Induced Plasticity (TWIP) steels, and medium manganese steels, (Bouaziz et al., 2013). The majority of the research are focused on the development of third generation of steels due to interest in the mechanical properties of high manganese steels. Only recently the TWIP steels have received considerable attention, owing to the increasing demand for high-performance auto materials from the automobile manufacturing industry (Ohjoon, et al., 2010; Grajcara,et al., 2012), cryogenic …show more content…
The properties are mainly controlled by the chemical composition of the steel. In high manganese steels, manganese is the major alloying element, accounting for a larger weight percentage. Manganese contents are considerably higher than those found in common steel grades (Hills et al., 2015). Regarding the major alloying elements in high manganese steels, Table 1 gives the approximate range of contents currently being studied.
Major elements in high manganese steel
% Weight
Mn
1.1 - 25.0
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Integrated steel plants make different grades of steels based on the steel chemistry, which also includes low alloy steels. Most of the alloy additions are carried out in the secondary steelmaking process. Recently steelmakers are attracted towards high manganese steels due to its potential material properties in the automobile manufacturing sector.

Secondary steelmaking process
Secondary steelmaking has become an integral feature of modern steel plants. All the different processes applied to liquid steel after the initial steelmaking process, prior to the continuous casting process, are included in the secondary steelmaking process. The tolerance levels of interstitial impurities and inclusions are lower in continuous casting than within ingot casting, and this has made secondary refining a critical component in order to control the impurities found in liquid

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