ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2014, Vol. 35 ›› Issue (3): 1-4.

• 试验研究 •    下一篇

夹杂物诱发晶内铁素体形核的动力学模型

朱立光1,吴耀光2,张彩军1,阎少宏3   

  1. 1河北联合大学冶金与能源学院,唐山063009 ;
    2河北钢铁集团石钢公司炼钢分厂,石家庄050031;
    3河北联合大学理学院,唐山063009
  • 收稿日期:2014-02-18 出版日期:2014-06-01 发布日期:2022-08-27
  • 作者简介:朱立光(1965-),男,博士,教授,冶金和材料研究。
  • 基金资助:
    河北省自然科学基金(编号:E2013209207)

Dynamics Model of Intra-Granular Ferrite Nucleation Induced by Inclusions

Zhu Liguang1, Wu Yaoguang2, Zhang Caijun1 ,Yan Shaohong3   

  1. 1 College of Metallurgy and Energy Resources, Hebei United University, Tangshan 063009;
    2 Steelmaking Works, Shijiazhuang Iron and Steel Co Ltd, Hebei Iron and Steel Group, Shijiazhuang 050031;
    3 College of Science, Hebei United University, Tangshan 063009
  • Received:2014-02-18 Published:2014-06-01 Online:2022-08-27

摘要: 依据实验现象和非均质形核热力学机理,结合数学运算,建立了夹杂物诱发晶内铁素体形核的动力学模型。结果表明,基底相为顶角α的正三棱锥,形核相为球形的形核模型,基底相嵌入形核相的体积大,润湿角小,且顶角α存在最佳值约为34°时,形核最容易。通过0.45%C钢铸坯1 150℃10 min加热后以30℃/min冷却至500℃,再以100℃/min冷却至室温的试验表明,在钢中获得了大量的具有典型形状的氮化钛夹杂物,并诱发晶内铁素体形核,分割了奥氏体晶粒,细化组织。

关键词: 夹杂物, 晶内铁素体, 诱发形核, 动力学, 模型

Abstract: According to the experimental phenomena and thermodynamics mechanism of heterogeneous nucleation, combined with mathematic calculation, a dynamics model of intra-granular ferrite nucleation induced by inclusions has been established. Results show that in the nucleation model basal phase is a triangular pyramid with apex angle a; the nucleation phase is spherical nucleating model; as the volume of basal phase embedded nucleation phase is bigger with small wetting angle and there is an optimum value of apex angle α- about 34°, it is easiest to nucleate. The test of 0.45% C steel casting billet with heating at 1 150 °C for 10 min then cooling to 500 °C by 30 %:/min rate and cooling to ambient by 100 ℃/min rate show that a lot of titanium nitride inclusions are got in steel to induce intra-granular ferrite nucleation, cut off austenite grain and fine structure.