Review evaluates how magnesium treatment alters inclusions and refines austenite in microalloyed steel, suggesting future research directions.
Mg treatment induces a series of changes in inclusions within microalloyed steel and significantly refines these inclusions. Suitable inclusions can promote intragranular acicular ferrite (IAF), which is a crucial mechanism for refining austenite grains. This article reviews the effects of Mg treatment under various conditions on inclusion formation and summarizes the factors influencing inclusion‐induced IAF in Mg‐treated microalloyed steel. Key factors include the characteristics of the inclusions, their relative size compared to austenite grains, the thermal processes experienced by the steel matrix, and microalloying system. Furthermore, it is emphasized that future research should focus on areas such as composite treatment methods and the diffusion behavior of molten steel under Mg treatment conditions.
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Yang et al. (2026) studied this question.
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