ABSTRACT Here, a novel cryogenic rolling plus intercritical annealing process was applied to a transformation-induced plasticity (TRIP) steel with a low chemical composition of carbon and manganese. Compared with traditional cold rolling, obvious grain refinement was observed, due to a high amount of dislocations retained. In addition, austenite volume fraction was increased, because of a unique nucleation mechanism. Subjected to cryogenic rolling, strength and ductility were increased, due to the enhanced austenite stability, which provided continuous and active TRIP effect. Consequently, tensile strength was increased to 1030 MPa, and elongation was increased to 38.2%. Thus, a great mechanical combination was obtained in a steel with a relatively low chemical composition with carbon and manganese, only by cryogenic rolling process.

中文翻译：

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低温轧制对相变诱导塑性钢的影响

摘要在这里，一种新型的低温轧制加临界间退火工艺应用于具有低化学成分碳和锰的相变诱导塑性 (TRIP) 钢。与传统冷轧相比，由于保留了大量位错，观察到明显的晶粒细化。此外，由于独特的成核机制，奥氏体体积分数增加。经过低温轧制，由于奥氏体稳定性增强，提供了连续和主动的 TRIP 效应，强度和延展性得到了提高。因此，拉伸强度增加到 1030 MPa，伸长率增加到 38.2%。因此，只有通过低温轧制工艺，才能在化学成分相对较低且含有碳和锰的钢中获得良好的机械组合。