金属热处理 ›› 2023, Vol. 48 ›› Issue (12): 148-152.DOI: 10.13251/j.issn.0254-6051.2023.12.025

• 工艺研究 • 上一篇    下一篇

停放时间/时效延迟时间对6005A铝合金弯曲型材性能的影响

黄惠毅1, 廖斌1, 乐永康1, 唐鹏2, 李飞龙1   

  1. 1.南南铝业股份有限公司, 广西 南宁 530200;
    2.广西大学 资源环境与材料学院, 广西 南宁 530003
  • 收稿日期:2023-07-21 修回日期:2023-10-24 出版日期:2023-12-25 发布日期:2024-01-29
  • 通讯作者: 唐 鹏,讲师,博士,E-mail:tp@gxu.edu.cn
  • 作者简介:黄惠毅(1992—),男,中级工程师,硕士,主要研究方向为铝合金应用技术,E-mail:hhyi637@163.com。
  • 基金资助:
    南宁市创新创业领军人才“邕江计划”(2020001);南宁市科学研究与技术开发计划(20221028);国家自然科学基金(52261024)

Effect of parking time and aging delay time on properties of 6005A aluminum alloy bending profile

Huang Huiyi1, Liao Bin1, Le Yongkang1, Tang Peng2, Li Feilong1   

  1. 1. Alnan Aluminium Co., Ltd., Nanning Guangxi 530200, China;
    2. School of Resources, Environment and Materials, Guangxi University, Nanning Guangxi 530003, China
  • Received:2023-07-21 Revised:2023-10-24 Online:2023-12-25 Published:2024-01-29

摘要: 通过拉伸、硬度及导电率测试等方法,系统探究了6005A铝合金固溶冷却后停放时间对型材弯曲性能及时效延迟时间对合金型材性能的影响。研究表明,6005A铝合金固溶后停放48 h之内,合金的强度快速升高,抗拉和屈服强度分别从140.5 MPa和37 MPa升至207 MPa和96 MPa;硬度从43.6 HV升至66 HV。杯突值和加工硬化指数n值的变化指出,6005A铝合金最佳的固溶后停放时间不应超过24 h。时效延迟时间在3 h之内的铝合金的性能变化明显,抗拉强度和屈服强度从293.3 MPa和277 MPa下降至262 MPa和245 MPa,伸长率从15%降至12.6%,最佳的时效延迟时间应小于3 h;延迟时间超过10 d后,抗拉和屈服强度呈“断崖式”下降至256 MPa和231 MPa。

关键词: 6005A铝合金, 停放效应, 弯曲型材, 力学性能

Abstract: Effect of parking time after solution treatment on the bending properties of 6005A aluminum alloy profiles and effect of aging delay time on the properties of alloy profiles were systematically investigated by means of tensile, hardness and conductivity tests. The results show that the strength of alloy rises rapidly within 48 h after solid solution, and the tensile and yield strengths rise from 140.5 MPa and 37 MPa to 207 MPa and 96 MPa, respectively, the hardness rises from 43.6 HV to 66 HV. Through the cupping value and the change of the work hardening exponent n value, it is pointed out that the optimal parking time after solid solution should not exceed 24 h. When aging delay time is within 3 h, the properties of the alloy changes sigificantly, the tensile strength and yield strength decrease from 293.3 MPa and 277 MPa to 262 MPa and 245 MPa, and the elongation decreases from 15% to 12.6%, the best aging delay time should be less than 3 h. After the delay time exceeds 10 d, the tensile and yield strengths drop to 256 MPa and 231 MPa, respectively, in a “cliff-like” manner.

Key words: 6005A aluminum alloy, parking effect, bending profile, mechanical properties

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