对低碳钢进行淬火和碳再分配处理(简称Q&P处理),利用扫描电子显微镜、透射电子显微镜和常温拉伸实验机等测试手段研究Q&P处理后低碳钢的组织与性能特点。结果表明,经Q&P处理后,低碳钢中的残余奥氏体组织有小颗粒状、薄膜状及大块状等形态结构。其抗拉强度随配分时间的延长而逐渐降低,强塑积和伸长率则随着配分时间的延长而逐渐增加。 Hardening and carbon redistribution (abbreviated as Q & P) of mild steel were conducted. The microstructures and properties of mild steel after Q & P treatment were studied by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tensile testing machine at room temperature. The results show that the residual austenite in the low carbon steel has the morphology of small granular, thin film and massive after Q & P treatment. The tensile strength gradually decreases with the extension of time, and the plastic mass and elongation increase with the extension of time.