金属热处理 ›› 2025, Vol. 50 ›› Issue (10): 93-98.DOI: 10.13251/j.issn.0254-6051.2025.10.014

• 材料研究 • 上一篇    下一篇

基于MnS相对塑性的Ti微合金钢中MnS夹杂物形态调控及工业实践

谢佳璇1, 张宇生1, 王子纯1, 路思浓1, 张朋1, 黄伟丽2,3, 郑小平1, 李红斌1   

  1. 1.华北理工大学 冶金与能源学院, 河北 唐山 063210;
    2.德龙钢铁有限公司 技术中心, 河北 邢台 054009;
    3.河北省热轧板带钢技术创新中心, 河北 邢台 054009
  • 收稿日期:2025-04-18 修回日期:2025-08-07 出版日期:2025-10-25 发布日期:2025-11-04
  • 通讯作者: 李红斌,副教授,博士,E-mail:lihongbinxp@126.com
  • 作者简介:谢佳璇(2000—),男,硕士研究生,主要研究方向为钢铁材料显微组织调控,E-mail:xiejx1204@stu.ncst.edu.cn。
  • 基金资助:
    中央引导地方科技发展资金项目(246Z1028G)

MnS inclusions morphology regulation and industry practice of Ti-microalloyed steel based on MnS relative plasticity

Xie Jiaxuan1, Zhang Yusheng1, Wang Zichun1, Lu Sinong1, Zhang Peng1, Huang Weili2,3, Zheng Xiaoping1, Li Hongbin1   

  1. 1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China;
    2. Technical Centre, Delong Iron and Steel Co., Ltd., Xingtai Hebei 054009, China;
    3. Hebei Hot Rolled Strip Technology Innovation Center, Xingtai Hebei 054009, China
  • Received:2025-04-18 Revised:2025-08-07 Online:2025-10-25 Published:2025-11-04

摘要: 使用Gleeble-3500热模拟试验机对Q355钢中MnS夹杂物的相对塑性进行了研究,并基于MnS的相对塑性变化规律,调整精轧温度,进行现场试验,分析了不同精轧温度对MnS夹杂物形态和分布变化规律以及试验钢组织和力学性能的影响。结果表明,相对变形量而言,MnS的相对塑性对温度更加敏感。通过调控精轧变形温度区间,可以有效调控MnS夹杂物形态。随着精轧轧制温度区间下降,试验钢的屈服强度显著提升,断后伸长率略有升高,MnS夹杂物级别由2.5级下降到1.0级,Q355钢中铁素体晶粒度差别不大,各向异性影响不大。

关键词: 精轧温度, Ti微合金钢, MnS夹杂物, 相对塑性, 组织, 性能

Abstract: Relative plasticity of MnS inclusions in Q355 steel was studied by using Gleeble-3500 thermal simulation test machine. Based on the relative plasticity change rule of MnS, the finishing rolling temperature was adjusted and the field test was carried out. The change rule of MnS inclusion morphology and distribution under different finishing rolling temperatures, as well as the change of microstructure and mechanical properties of the tested steel were analyzed. The results show that the relative plasticity of MnS inclusions is more sensitive to temperature than rolling reduction. The morphology of MnS inclusions is modulated effectively by adjusting the finishing rolling temperature range. With the decrease of finishing rolling temperature range, the yield strength of the tested steel increases, the elongation after fracture slightly decreases, the grade of MnS inclusions decreases from 2.5 to 1.0, the ferrite grain size grade changes little, and the anisotropy variation is little.

Key words: finishing rolling temperature, Ti-microalloyed steel, MnS inclusion, relative plasticity, microstructure, mechanical properties

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