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TRIP钢(相变诱发塑性)属于多相低碳钢。因其高强度与极佳塑性的完美结合,而适于制造抗冲撞汽车部件,至今已研究二十余年。此外,TRIP钢还是很好的环保材料,具有化学成分简单、节约重量和高循环使用性的特点。本文介绍了TRIP现象的机制、合金设计的理念、加入低碳钢中元素的作用及热处理后显微组织的变化。结论认为:残余奥氏体的体积百分数及其稳定性对高强TRIP钢的成形性具有重要影响。
TRIP steels (phase change induced plasticity) belong to multi-phase mild steel. Because of its perfect combination of high strength and excellent ductility, it is suitable for manufacturing anti-collision auto parts and has been studied for more than 20 years. In addition, TRIP steel is also a good eco-friendly material with a simple chemical composition, weight saving and high cycle performance. This paper introduces the mechanism of TRIP phenomenon, the concept of alloy design, the effect of adding elements in mild steel and the microstructure changes after heat treatment. The conclusion is that the volume fraction of retained austenite and its stability have an important influence on the formability of high strength TRIP steels.