新型铝锌镁铜系高强韧铝合金型材的双级时效工艺
Two-step Aging Treatment for a New Al-Zn-Mg-Cu Type of High Strength-Tough Aluminum Alloy Profile
摘 要
通过时效处理和拉伸性能测试等方法得到了适用于一种新型铝锌镁铜系高强韧铝合金挤压型材的双级时效工艺。结果表明：在双级时效处理后该合金的析出相主要为η′相和少量的η相, 随着二级时效时间的延长, η相数量增加, 沉淀相尺寸增大; 试验合金的硬度随着时效时间的延长先增大后减小, 强度随二级时效时间的延长而下降, 伸长率则增大; 得到合适的时效工艺为120 ℃×4 h+165 ℃×6 h, 经该时效工艺处理后试验合金的抗拉强度为566 MPa, 屈服强度为540 MPa, 伸长率为10.9%, 电导率为40.8%IACS, 优于T74态7050铝合金的。
型材
双级时效
显微组织
性能
high strength-tough aluminum alloy
profile
two-step aging
microstructure
property
Abstract
A suitable two-step aging treatment for a new Al-Zn-Mg-Cu type of high strength-tough aluminum alloy profile was obtained by aging treatment and tensile test methods. The results show that the precipitates in the alloy mainly consisted of η′ and η phase after the two-step aging treatment, and the amounts of the η phases increased and the dimensions of the precipitates enlarged with the prolonging of the 2nd step aging time. The hardness of the alloy first increased then decreased with the increase of the aging time, and the strength decreased while the elongation increased with the increase of the 2nd step aging time. The two-step aging process of aging at 120 ℃ for 4 h followed by a re-aging at 165 ℃ for 6 h was determined as a suitable one. After treated by the suitable aging treatment, the tensile strength, yield strength, elongation and electrical conductivity of the alloy were 566 MPa, 540 MPa, 10.9% and 40.8%IACS respectively, and were better than those of 7050-T74 aluminum alloy.
中图分类号 TG146.2 DOI 10.11973/jxgccl201602015
所属栏目 新材料 新工艺
基金项目
收稿日期 2014/12/19
修改稿日期 2015/11/13
网络出版日期
作者单位点击查看
备注高莹(1978-), 女, 甘肃天水人, 高级工程师, 硕士。
引用该论文: GAO Ying,ZHANG Xian-feng,WANG Shao-hua,LIU Hui. Two-step Aging Treatment for a New Al-Zn-Mg-Cu Type of High Strength-Tough Aluminum Alloy Profile[J]. Materials for mechancial engineering, 2016, 40(2): 61～65
高莹,张显峰,王少华,刘惠. 新型铝锌镁铜系高强韧铝合金型材的双级时效工艺[J]. 机械工程材料, 2016, 40(2): 61～65
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】NAKAI M. New aspects of development of high strength aluminum alloys for aerospace applications［J］. Materials Science and Engineering: A, 2000, 285(1): 62-68.
【2】李成功, 巫世杰, 戴圣龙, 等.先进铝合金在航空航天工业中的应用与发展［J］.中国有色金属学报, 2002, 12(1):14-21.
【3】王少华, 张兴国, 杨守杰, 等. 时效制度对Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr合金断裂行为的影响［J］.稀有金属材料与工程, 2011, 40(3):453-456.
【4】王少华,马志锋, 刘惠, 等. 铝锌镁铜锆钪合金型材的组织性能［J］. 机械工程材料, 2014, 38(6):60-65.
【5】LI Z H, XIONG B Q, ZHANG Y A, et al. Effects of the two-step ageing treatment on the microstructure and properties of 7B04 alloy pre-stretched thick plates［J］. Rare Metals, 2007, 26(3):193-199.
【6】冯朝辉, 王少华, 胡兴华, 等. 第二级时效工艺对7050铝合金厚板组织及性能的影响［J］.机械工程材料, 2011, 35(5): 35-38.
【7】STILLER K, WARREN P J, HANSEN V, et al. Investigation of precipitation in an Al-Zn-Mg alloy after two-step ageing treatment at 100 ℃ and 150 ℃［J］. Materials Science and Engineering：A, 1999, 270(1):55-63.
【8】WANG S H, ZHANG X G, YANG S J, et al. Microstructure and mechanical properties of forged Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr alloy after two-step ageing treatment at 120 and 170 ℃［J］. Rare Metals, 2010, 29 (4): 433-437.
【9】SHA G, CEREZO A. Early-stage precipitation in Al-Zn-Mg-Cu alloy (7050)［J］. Acta Materialia, 2004, 52(15):4503-4516.
【10】CHEN J Z, ZHEN L, YANG S J, et al. Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy［J］. Materials Science and Engineering: A, 2009, 500(1/2):34-42.
【2】李成功, 巫世杰, 戴圣龙, 等.先进铝合金在航空航天工业中的应用与发展［J］.中国有色金属学报, 2002, 12(1):14-21.
【3】王少华, 张兴国, 杨守杰, 等. 时效制度对Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr合金断裂行为的影响［J］.稀有金属材料与工程, 2011, 40(3):453-456.
【4】王少华,马志锋, 刘惠, 等. 铝锌镁铜锆钪合金型材的组织性能［J］. 机械工程材料, 2014, 38(6):60-65.
【5】LI Z H, XIONG B Q, ZHANG Y A, et al. Effects of the two-step ageing treatment on the microstructure and properties of 7B04 alloy pre-stretched thick plates［J］. Rare Metals, 2007, 26(3):193-199.
【6】冯朝辉, 王少华, 胡兴华, 等. 第二级时效工艺对7050铝合金厚板组织及性能的影响［J］.机械工程材料, 2011, 35(5): 35-38.
【7】STILLER K, WARREN P J, HANSEN V, et al. Investigation of precipitation in an Al-Zn-Mg alloy after two-step ageing treatment at 100 ℃ and 150 ℃［J］. Materials Science and Engineering：A, 1999, 270(1):55-63.
【8】WANG S H, ZHANG X G, YANG S J, et al. Microstructure and mechanical properties of forged Al-7.1Zn-1.1Mg-1.6Cu-0.14Zr alloy after two-step ageing treatment at 120 and 170 ℃［J］. Rare Metals, 2010, 29 (4): 433-437.
【9】SHA G, CEREZO A. Early-stage precipitation in Al-Zn-Mg-Cu alloy (7050)［J］. Acta Materialia, 2004, 52(15):4503-4516.
【10】CHEN J Z, ZHEN L, YANG S J, et al. Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy［J］. Materials Science and Engineering: A, 2009, 500(1/2):34-42.
相关信息
