金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 331-335.DOI: 10.13251/j.issn.0254-6051.2024.07.051

• 工艺研究 • 上一篇    

汽车用6014铝合金冷轧板的热处理工艺

张新宇1, 隋欣1, 罗旭东1, 程素玲1, 张义1, 陈金生1, 张伟2   

  1. 1.天津忠旺科技有限公司, 天津 301700;
    2.辽宁忠旺集团有限公司, 辽宁 辽阳 111003
  • 收稿日期:2023-12-22 修回日期:2024-04-05 出版日期:2024-07-25 发布日期:2024-08-29
  • 通讯作者: 罗旭东,高级工程师,博士,E-mail:luoxd@zhongwangtj.com
  • 作者简介:张新宇(1994—),男,工程师,硕士,主要研究方向为铝合金加工及热处理,E-mail:619257548@qq.com。

Heat treatment process of 6014 aluminum alloy cold rolled sheets for automobile

Zhang Xinyu1, Sui Xin1, Luo Xudong1, Cheng Suling1, Zhang Yi1, Chen Jinsheng1, Zhang Wei2   

  1. 1. Tianjin Zhongwang Technology Co., Ltd., Tianjin 301700, China;
    2. Liaoning Zhongwang Group Co., Ltd., Liaoyang Liaoning 111003, China
  • Received:2023-12-22 Revised:2024-04-05 Online:2024-07-25 Published:2024-08-29

摘要: 采用室温拉伸、导电率、金相显微镜(OM)与扫描电镜(SEM)研究固溶时间对170 ℃×12 h人工时效后6014铝合金冷轧板材力学性能、导电率和显微组织的影响。结果表明,随固溶时间的延长,黑色Mg2Si相逐渐回溶,富铁相尺寸逐渐变小。当固溶时间为120 min时,基本完成β-Al5FeSi相向α-AlFeSi相转变,板材拉伸性能呈先升高后不变再下降的趋势,当固溶时间为10 min时,板材时效后性能最佳,抗拉强度、屈服强度、伸长率与导电率分别为321.33 MPa、300.26 MPa、10.93%与51.53%IACS。

关键词: 6014铝合金, 热处理, 力学性能, 微观组织

Abstract: Effect of solution treatment time on mechanical properties, electrical conductivity and microstructure of 6014 aluminum alloy cold-rolled sheet after artificial aging at 170 ℃ for 12 h was studied using room temperature stretching, electrical conductivity measurement, metallographic microscopy (OM) and scanning electron microscopy (SEM). The results show that with the extension of solution treatment time, the black Mg2Si phase gradually dissolves back, and the size of the rich iron phase gradually decreases. When the solution treatment time is 120 min, β-Al5FeSi phase to α-AlFeSi phases transition process is basically completed. The trend of the tensile properties is first increasing, then remaining unchanged, and then decreasing. When the solution time is 10 min, the properties of the aged sheets is the best, with tensile strength of 321.33 MPa, yield strength of 300.26 MPa, elongation of 10.93%, and conductivity of 51.53%IACS.

Key words: 6014 aluminum alloy, heat treatment, mechanical properties, microstructure

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