铜对中碳硅锰钢连续冷却相变的影响

发布时间：2018-05-09 10:25

  本文选题：中碳硅锰钢 + 连续冷却相变　； 参考：《钢铁》2017年12期

【摘要】：为了探索含铜中碳硅锰钢连续冷却转变过程中的相变规律,采用DIL805L型膨胀仪研究了铜对中碳硅锰钢连续冷却过程中显微组织和硬度的影响,借助高分辨透射电镜研究了连续冷却过程中含铜相的析出行为。结果表明,在中碳硅锰钢的连续冷却过程中,铜的加入使得铁素体转变的孕育期延长,且降低贝氏体和马氏体开始转变温度。富铜颗粒在铁素体中弥散析出,细化连续相变组织。冷却速度小于21℃/s时,含铜中碳硅锰钢由于富铜颗粒析出以及贝氏体和马氏体组织增加引起显微硬度增加。当冷却速度大于21℃/s时,铜反而会降低钢中贝氏体和马氏体组织的显微硬度。
[Abstract]:In order to explore the transformation law of carbon silicon-manganese steel during continuous cooling transformation, the effect of copper on microstructure and hardness of medium carbon silicon-manganese steel during continuous cooling was studied by DIL805L expansion instrument. The precipitation behavior of copper-bearing phases during continuous cooling was studied by means of high resolution transmission electron microscopy. The results show that the incubation period of ferrite transformation is prolonged and the transformation temperature of bainite and martensite is decreased with the addition of copper during the continuous cooling of medium carbon silicon-manganese steel. The copper-rich particles dispersed in ferrite and refined the structure of continuous phase transformation. When the cooling rate is less than 21 鈩，

本文编号：1865664