金属热处理 ›› 2024, Vol. 49 ›› Issue (8): 130-135.DOI: 10.13251/j.issn.0254-6051.2024.08.021

• 工艺研究 • 上一篇    下一篇

430不锈钢的连续退火工艺

杨永超1,2,3, 李玉贵1, 赵子钧2,3   

  1. 1.太原科技大学 材料科学与工程学院, 山西 太原 030024;
    2.太原钢铁(集团)有限公司 先进不锈钢材料国家重点实验室, 山西 太原 030003;
    3.山西太钢不锈钢股份有限公司 技术中心, 山西 太原 030003
  • 收稿日期:2024-03-05 修回日期:2024-06-28 出版日期:2024-08-25 发布日期:2024-09-27
  • 通讯作者: 李玉贵,教授,博士,E-mail:liyugui2008@163.com
  • 作者简介:杨永超(1990—),男,高级工程师,博士,主要研究方向为不锈钢产品开发及工艺,E-mail:yangyc@tisco.com.cn。
  • 基金资助:
    中央引导地方科技发展资金(YDZJSX2021A036)

Continuous annealing process of 430 stainless steel

Yang Yongchao1,2,3, Li Yugui1, Zhao Zijun2,3   

  1. 1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;
    2. State Key Laboratory of Advanced Stainless Steel Materials, Taiyuan Iron & Steel (Group) Co., Ltd., Taiyuan Shanxi 030003, China;
    3. Technology Center, Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China
  • Received:2024-03-05 Revised:2024-06-28 Online:2024-08-25 Published:2024-09-27

摘要: 430不锈钢热轧板退火一般在罩式炉中进行,生产周期长,严重制约生产能力的提升。通过化学成分及退火工艺的优化,对430不锈钢热轧板的连续退火工艺进行了试验研究。结果表明,在实验室条件下,430不锈钢的最佳连续退火工艺为退火温度880 ℃、保温时间240 s;在910 ℃退火时,存在奥氏体转变。结合实际大生产工况情况,退火酸洗产线的热处理温度设定范围为(880±5) ℃。热轧态430不锈钢经连续退火后条带组织无法完全消除;经冷轧变形及成品退火酸洗后,试验钢伸长率达到了26%以上,可满足浅冲压行业的使用需求。

关键词: 连续退火, 430不锈钢, 组织, 性能

Abstract: Annealing of 430 stainless steel hot rolled plate is generally carried out in the bell-type furnace, which has a long production cycle and seriously restricts the improvement of production capacity. Experimental research was conducted on the continuous annealing process of the 430 stainless steel hot rolled plates through optimization of chemical composition and annealing process. The results show that under laboratory conditions, the optimal heat treatment process of the 430 stainless steel is annealing at 880 ℃ and holding for 240 s. Austenite transformation occurs when annealed at 910 ℃. Based on the actual production conditions, the heat treatment temperature range for the annealing and pickling production line can be set to (880 ± 5) ℃. The strip structure of the hot rolled 430 stainless steel cannot be completely eliminated after continuous annealing. After cold rolling, finishing annealing and pickling, the elongation of the tested steel reaches over 26%, which can meet the usage needs of the shallow stamping industry.

Key words: continuous annealing, 430 stainless steel, microstructure, properties

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