金属热处理 ›› 2024, Vol. 49 ›› Issue (8): 174-177.DOI: 10.13251/j.issn.0254-6051.2024.08.030

• 工艺研究 • 上一篇    下一篇

退火温度对汽车后背门板用Fe-0.12C-4.85Mn-0.24Si钢组织与力学性能的影响

梁科1, 武猛1, 张习烨2, 行志刚3   

  1. 1.河南理工大学 鹤壁工程技术学院, 河南 鹤壁 458030;
    2.河南理工大学 机械与动力工程学院, 河南 焦作 454003;
    3.河南理工大学 工程训练中心, 河南 焦作 454003
  • 收稿日期:2024-03-01 修回日期:2024-06-18 出版日期:2024-08-25 发布日期:2024-09-27
  • 通讯作者: 行志刚,工程师,硕士,E-mail:xzg@hpu.edu.cn
  • 作者简介:梁 科(1987—),男,讲师,硕士,主要研究方向为金属材料加工,E-mail:liangk@hpu.edu.cn。
  • 基金资助:
    国家级大学生创新创业训练计划(202210460011);河南理工大学鹤壁工程技术学院2023年度校级科研项目(2023-ZRYB-018)

Effect of annealing temperature on microstructure and mechanical properties of Fe-0.12C-4.85Mn-0.24Si steel for automobile back door panels

Liang Ke1, Wu Meng1, Zhang Xiye2, Xing Zhigang3   

  1. 1. Hebi Institute of Engineering and Technology, Henan Polytechnic University, Hebi Henan 458030, China;
    2. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China;
    3. Engineering Training Center, Henan Polytechnic University, Jiaozuo Henan 454003, China
  • Received:2024-03-01 Revised:2024-06-18 Online:2024-08-25 Published:2024-09-27

摘要: 利用扫描电镜、万能试验机、X射线衍射仪等研究了两相区不同温度退火对Fe-0.12C-4.85Mn-0.24Si钢组织与力学性能的影响。结果表明,随着退火温度的升高,Fe-0.12C-4.85Mn-0.24Si钢晶粒尺寸逐渐增大,碳化物逐渐溶解,组织中奥氏体体积分数先增加后减少。640 ℃退火的Fe-0.12C-4.85Mn-0.24Si钢的奥氏体体积分数最高,为22.1%。随着退火温度的升高,Fe-0.12C-4.85Mn-0.24Si钢的抗拉强度逐渐升高,伸长率和强塑积先升高后降低,640 ℃退火的Fe-0.12C-4.85Mn-0.24Si钢的伸长率和强塑积最高,分别为30.4%和28.47 GPa·%。

关键词: Fe-0.12C-4.85Mn-0.24Si钢, 退火温度, 微观组织, 力学性能

Abstract: Effect of different temperatures annealing in the two-phase region on the microstructure and mechanical properties of Fe-0.12C-4.85Mn-0.24Si steel was studied using scanning electron microscopy, universal testing machine, X-ray diffraction instrument. The results show that with the increase of annealing temperature, the grain size of the Fe-0.12C-4.85Mn-0.24Si steel gradually increases, carbides gradually dissolve, and the volume fraction of austenite in the microstructure first increases and then decreases. The Fe-0.12C-4.85Mn-0.24Si steel annealed at 640 ℃ has the highest austenite volume fraction of 22.1%. As the annealing temperature increases, the tensile strength of the Fe-0.12C-4.85Mn-0.24Si steel gradually increases, and the product of elongation and strength first increases and then decreases. The elongation and product of strength and elongation of the Fe-0.12C-4.85Mn-0.24Si steel annealed at 640 ℃ are the highest, which are 30.4% and 28.47 GPa ·%, respectively.

Key words: Fe-0.12C-4.85Mn-0.24Si steel, annealing temperature, microstructure, mechanical properties

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