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通过对中、高锰钢铸锭低倍组织、导热系数及显微组织进行研究,为中、高锰钢连铸工艺的研究提供了理论基础。研究表明,中、高锰钢的导热系数较低,在凝固过程中易形成粗大柱状晶。中锰钢w[Mn]=3.35%时,显微组织为贝氏体;w[Mn]=5.82%时,显微组织为马氏体。随w[Mn]增大,高锰钢显微组织中奥氏体相的比例增大,最终形成奥氏体单相组织。
By studying the low magnification, thermal conductivity and microstructure of medium and high manganese ingots, it provides a theoretical basis for the research of continuous casting technology of medium and high manganese steel. The results show that the thermal conductivity of medium and high manganese steel is low, and coarse columnar crystals easily form during solidification. When the Mn content in the Mn steel is 3.35%, the microstructure is bainite and the microstructure is martensite when w [Mn] = 5.82%. With the increase of w [Mn], the proportion of austenite phase in the microstructure of high manganese steel increases, finally forming austenite single phase structure.