金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 50-54.DOI: 10.13251/j.issn.0254-6051.2021.01.009

• 工艺研究 • 上一篇    下一篇

退火工艺对DP590GA双相钢组织和性能的影响

李慧远1, 戴杰涛2, 冼玲标1, 任建平1, 李烈军3   

  1. 1.广州JFE钢板有限公司,广东 广州 511464;
    2.广州大学 机械与电气工程学院,广东 广州 510006;
    3.华南理工大学 机械与汽车工程学院,广东 广州 510641
  • 收稿日期:2020-03-15 出版日期:2021-01-25 发布日期:2021-01-26
  • 作者简介:李慧远(1980—),男,高级工程师,硕士,主要研究方向为汽车板生产及应用,E-mail:gwli98@163.com
  • 基金资助:
    广州市科技计划项目一般项目(201804010168)

Effect of annealing process on microstructure and properties of dual phase steel DP590GA

Li Huiyuan1, Dai Jietao2, Xian Lingbiao1, Ren Jianping1, Li Liejun3   

  1. 1. Guangzhou JFE Steel Sheet Company Ltd.,Guangzhou Guangdong 511464,China;
    2. School of Mechanic and Electric Engineering,Guangzhou University,Guangzhou Guangdong 510006,China;
    3. School of Mechanical & Automotive Engineering,South China University of Technology,Guangzhou Guangdong 510641,China
  • Received:2020-03-15 Online:2021-01-25 Published:2021-01-26

摘要: 研究退火工艺及快冷工艺对C-Mn系DP590GA双相钢性能和组织的影响。结果表明,该试验钢的规定塑性延伸强度随着均热温度的提高而上升,且温度越高规定塑性延伸强度的增加越显著;而伸长率随着均热温度的提高,先上升后下降;而快冷终止温度提高时,试验钢的强度上升,塑性下降。该试验钢在820 ℃进行退火时,可获得较优的力学性能,规定塑性延伸强度达到400 MPa,抗拉强度达到625 MPa,伸长率达到25.5%。

关键词: 合金化热镀锌, 双相钢, 退火工艺, 组织, 性能

Abstract: Effects of annealing and rapid cooling processes on the properties and microstructure of C-Mn DP590GA steel were studied.The results show that the Rp0.2 of the tested steel increases with the increase of soaking temperature,and the more significant the increase of Rp0.2 along with the increase of soaking temperature.The elongation of the tested steel increases initially as the soaking temperature increases and decreases afterwards.The strength and plasticity of the tested steel increase and decrease,respectively with the increase of rapid cooling ending temperature.When the soaking temperature of the steel is 820 ℃,the better mechanical properties can be obtained:the Rp0.2 is 400 MPa,the Rm is 625 MPa and the A50 is 25.5%.

Key words: hot dip galvanizing, dual phase steel, annealing process, microstructure, properties

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