金属热处理 ›› 2020, Vol. 45 ›› Issue (12): 102-105.DOI: 10.13251/j.issn.0254-6051.2020.12.019

• 工艺研究 • 上一篇    下一篇

退火工艺对TRIP980冷轧钢板显微组织和力学性能的影响

吴静1, 董欣欣1, 刘丽萍2   

  1. 1.唐山科技职业技术学院, 河北 唐山 063000;
    2.唐钢技术中心, 河北 唐山 063016
  • 收稿日期:2020-06-26 出版日期:2020-12-25 发布日期:2021-01-14
  • 作者简介:吴 静(1979—),女,副教授,主要研究方向为轧钢,E-mail:1911513335@qq.com

Effect of annealing process on microstructure and mechanical properties of cold rolled TRIP980 steel plate

Wu Jing1, Dong Xinxin1, Liu Liping2   

  1. 1. Tangshan Vocational College of Science and Technology, Tangshan Hebei 063000, China;
    2. Technical Center of Tang Steel Tangshan, Tangshan Hebei 063016, China
  • Received:2020-06-26 Online:2020-12-25 Published:2021-01-14

摘要: 以冷轧TRIP980钢为研究对象,探讨了退火温度、过时效温度和过时效时间对钢板组织性能的影响。结果表明:退火温度从800 ℃降低至760 ℃,随着奥氏体化程度的降低和原奥稳定性的增强,冷却后组织中硬相含量更低,残奥含量更高,宏观表现为拉伸强度降低、伸长率提高;过时效温度从360 ℃提高至400 ℃,随着贝氏体体积分数的提高,拉伸强度提高;过时效时间从600 s延长至1500 s,随着硬相贝氏体的软化和残奥稳定性增大,拉伸强度降低、伸长率提高。

关键词: 冷轧TRIP980钢, 退火工艺, 贝氏体, 残留奥氏体, 力学性能

Abstract: Effects of annealing temperature, over-aging temperature and over-aging time on the microstructure and mechanical properties of cold rolled TRIP980 steel plate were studied. It is found that when the annealing temperature decreases from 800 ℃ to 760 ℃, with the decrease of austenitizing degree and the enhancement of original austenite stability, the hard phase content becomes lower and the retained austenite content becomes higher, macroscopically showing that the tensile strength decreases and the elongation increases. When the over-aging temperature increases from 360 ℃ to 400 ℃, the strength increases with the increase of bainite volume fraction. When the over-aging time increases from 600 s to 1500 s, the hard phase bainite softens and the stability of retained austenite increases, which result in the tensile strength decrease and the elongation increase.

Key words: cold rolled TRIP980 steel, annealing process, bainite, retained austenite, mechanical properties

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