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本文探讨了含Si、Mn、的碳素钢被加热到奥氏体区及奥氏体+铁素体两相区后,使之发生贝氏体相变时,未相变的奥氏体的稳定性和残留奥氏体的生成动态。在贝氏体相变过程中,通过碳在未相变的奥氏体中的浓化作用使奥氏体稳定化。碳超过临界浓度的奥氏体,即使在常温也不相变,即成为残留奥氏体。本文在说明这种稳定化奥氏体生成过程的同时,提出了关于伴随贝氏体相变的组织变化及残留奥氏体生成动态的机构模型。
In this paper, it is discussed that when austenite and austenite + ferrite are heated to austenite and ferrite, the carbon steel containing Si and Mn is transformed into bainite, Stability and residual austenite formation dynamics. During bainite transformation, austenite is stabilized by the concentration of carbon in the un-transformed austenite. Austenite whose carbon exceeds the critical concentration does not change phase even at normal temperature, and thus becomes retained austenite. In this paper, while explaining the process of the formation of stabilized austenite, a mechanism model about the microstructure and residual austenite formation along with the transformation of bainite was proposed.