金属热处理 ›› 2022, Vol. 47 ›› Issue (12): 158-161.DOI: 10.13251/j.issn.0254-6051.2022.12.027

• 材料研究 • 上一篇    下一篇

Al对SWRH62A钢奥氏体晶粒长大的影响

王金涛, 李战卫, 于学森, 张宇   

  1. 江苏省(沙钢)钢铁研究院, 江苏 张家港 215625
  • 收稿日期:2022-08-02 修回日期:2022-10-17 出版日期:2022-12-25 发布日期:2023-01-05
  • 通讯作者: 张 宇,正高级工程师,博士,E-mail:zhangyu-iris@shasteel.cn
  • 作者简介:王金涛(1994—),女,助理工程师,硕士,主要研究方向为钢铁材料棒线材产品开发,E-mail:wangjt-iris@shasteel.cn。

Effect of Al on austenite grain growth of SWRH62A steel

Wang Jintao, Li Zhanwei, Yu Xuesen, Zhang Yu   

  1. Institute of Research of Iron & Steel, Sha-steel, Zhangjiagang Jiangsu 215625, China
  • Received:2022-08-02 Revised:2022-10-17 Online:2022-12-25 Published:2023-01-05

摘要: 采用高温光学显微镜研究了Al对SWRH62A钢在加热过程中奥氏体晶粒长大的影响。结果表明,添加0.015%~0.045%的Al可将SWRH62A钢在低于1050 ℃保温时的晶界激活能由474.14 kJ/mol提高至1175.73 kJ/mol,奥氏体晶粒长大速度由0.18 μm/℃降低至0.12 μm/℃,具有显著细化晶粒的作用。

关键词: SWRH62A钢, 晶粒尺寸, 高温金相, 微合金, 晶界激活能

Abstract: Effect of Al content on the austenite grain growth of SWRH62A steel during heating was investigated by using high temperature optical microscopy. The results show that addition of 0.015%-0.045% Al increases the grain boundary activation energy of the SWRH62A steel from 474.14 kJ/mol to 1175.73 kJ/mol, and decreases the austenite grain growth rate from 0.18 μm/℃ to 0.12 μm/℃ with a soaking temperature below 1050 ℃, which can significantly refine grains.

Key words: SWRH62A steel, grain size, high temperature metallographic, micro alloy, grain boundary, activation energy

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