基于响应面法的7075铝合金非等温时效工艺优化

doi:10.13251/j.issn.0254-6051.2025.11.027

金属热处理 ›› 2025, Vol. 50 ›› Issue (11): 192-199.DOI: 10.13251/j.issn.0254-6051.2025.11.027

基于响应面法的7075铝合金非等温时效工艺优化

王敏^1,2,3, 刘文巧^1,2,3, 徐帅杰^1,2,3, 马建浩^1,2,3, 陈荣创^1,2,3, 郭巍⁴

1.湖北汽车工业学院汽车材料学院, 湖北十堰 442002;
2.储能与动力电池湖北省重点实验室(湖北汽车工业学院), 湖北十堰 442002;
3.汽车动力传动与电子控制湖北省重点实验室(湖北汽车工业学院), 湖北十堰 442002;
4.武汉理工大学现代汽车零部件技术湖北省重点实验室, 湖北武汉 430070

收稿日期:2025-04-11 修回日期:2025-09-04 发布日期:2025-12-16
作者简介:王敏(1979—),女,教授,博士,主要研究方向为精确塑性成形技术,E-mail:1274385083@qq.com
基金资助:
湖北省自然科学基金(2024AFD099);湖北省科技计划重点研发项目(2025BAB074);十堰市科技计划重点项目(2025K18);湖北汽车工业学院2024年度揭榜制项目(2024JBB05);湖北省高等学校优秀中青年科技创新团队计划(T201518)

Optimization of non-isothermal aging process for 7075 aluminum alloy based on response surface methodology

Wang Min^1,2,3, Liu Wenqiao^1,2,3, Xu Shuaijie^1,2,3, Ma Jianhao^1,2,3, Chen Rongchuang^1,2,3, Guo Wei⁴

1. School of Automotive Materials, Hubei University of Automotive Technology, Shiyan Hubei 442002, China;
2. Hubei Key Laboratory of Energy Storage and Power Battery(Hubei University of Automotive Technology), Shiyan Hubei 442002, China;
3. Key Laboratory of Automotive Power Train and Electronics(Hubei University of Automotive Technology), Shiyan Hubei 442002, China;
4. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan Hubei 430070, China

Received:2025-04-11 Revised:2025-09-04 Published:2025-12-16

摘要/Abstract

摘要： 采用中心复合响应面法构建了7075铝合金非等温时效(NIA)的关键工艺参数(峰值温度和温变速率)与时效时间及力学性能(抗拉强度和伸长率)之间的数学模型。基于该模型,揭示了关键工艺参数及其交互作用对时效时间和力学性能的影响规律。且分别以抗拉强度最大和时效时间最短为目标,对关键工艺参数进行了优化,并对优化结果进行了试验验证。此外,还对7075铝合金经NIA处理后的耐腐蚀性能进行了对比研究。结果表明,峰值温度对力学性能的影响较温变速率显著,两者之间的交互作用较强。当峰值温度为181 ℃、温变速率为34 ℃/h时,抗拉强度最大;与等温峰值时效(T6)相比,时效时间缩短了90.6%,抗拉强度提升了3.0%,但伸长率降低了12.3%。当峰值温度为169 ℃、温变速率为39 ℃/h时,时效时间最短,为1.84 h;与等温双级时效(T73)相比,时效时间缩短了91.6%,抗拉强度提升了1.8%,伸长率提高了5.5%。与T73态铝合金相比,NIA态合金的耐蚀性更优异。

关键词: 7075铝合金, 响应面法, 非等温时效, 耐腐蚀性

Abstract: A mathematical model between the key non-isothermal aging (NIA) process parameters (peak temperature and temperature change rate) and aging time and mechanical properties (tensile strength and elongation) of 7075 aluminum alloy was established by using the central composite response surface methodology. Based on this model, the effect of key process parameters and their interactions on aging time and mechanical properties was revealed. Furthermore, with the goals of maximizing tensile strength and minimizing aging time, the key process parameters were optimized, and experimental verification was conducted on the optimization results. In addition, a comparative study on the corrosion resistance of the 7075 aluminum alloy after NIA treatment was conducted. The results show that the peak temperature has a more significant impact on mechanical properties compared to the temperature change rate, and there is a strong interaction between the two. When the peak temperature is 181 ℃ and the temperature change rate is 34 ℃/h, the maximum tensile strength is achieved. Compared with isothermal peak aging (T6), the aging time is reduced by 90.6%, tensile strength is increased by 3.0%, but elongation is decreased by 12.3%. When the peak temperature is 169 ℃ and the temperature change rate is 39 ℃/h, the shortest aging time is obtained, which is 1.84 h. Compared with isothermal double-stage aging (T73), the aging time is reduced by 91.6%, tensile strength is increased by 1.8%, and elongation is increased by 5.5%. Compared with the T73 state, the corrosion resistance of the alloy in NIA state is superior.

Key words: 7075 aluminum alloy, response surface methodology, non-isothermal aging, corrosion resistance

中图分类号:

TG166.3

王敏, 刘文巧, 徐帅杰, 马建浩, 陈荣创, 郭巍. 基于响应面法的7075铝合金非等温时效工艺优化[J]. 金属热处理, 2025, 50(11): 192-199.

Wang Min, Liu Wenqiao, Xu Shuaijie, Ma Jianhao, Chen Rongchuang, Guo Wei. Optimization of non-isothermal aging process for 7075 aluminum alloy based on response surface methodology[J]. Heat Treatment of Metals, 2025, 50(11): 192-199.

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基于响应面法的7075铝合金非等温时效工艺优化

Optimization of non-isothermal aging process for 7075 aluminum alloy based on response surface methodology

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