Transactions of Materials and Heat Treatment

Title：Optimization of forging temperature of high strength aluminum alloy with strontium for building

Authors： Liu Lin Hou Gongyu

Unit： Hebei Politics and Law Career Academy China University of Mining and Technology

KeyWords： initial forging temperature final forging temperature high strength aluminum alloy Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr wear resistance porperties at high temperature mechanical properties at high temperature

ClassificationCode：TU599

year,vol(issue):pagenumber：2018,43(4):22-26

Abstract：

The high strength aluminum alloys Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr for building were processed at different forging temperatures, and the friction and tensile tests were carried out at 200 ℃. The results show that the wear resistance properties and mechanical properties at high temperature of new high strength aluminum alloy Al-6.2Zn-2.5Cu-2.2Mg-0.4Sr increase first and then decrease with the increasing of initial forging temperature from 360 ℃ to 440 ℃ or finial forging temperature from 280 ℃ to 340 ℃. Compared with the initial forging temperature of 360 ℃, when the initial forging temperature is 420 ℃, the wear volume decreases by 62.1%, and the tensile strength increases by 47.3% as well as the yield strength increases by 54.5%. Compared with the finial forging temperature of 280 ℃, when the finial forging temperature is 320 ℃, the wear volume decreases by 53.2%, and the tensile strength increases by 21.2% as well as the yield strength increases by 25.1%. Thus, the optimized initial forging temperature and finial forging temperature are 420 and 320 ℃, respectively.

Funds：

国家自然科学基金资助项目(50304012)

刘琳（1988-），女，硕士，助教；E-mail：liulin8828@163.com

Reference：

[1]李江,李付国,薛凤梅,等.7050高强铝合金断裂韧性及其影响因素研究[J].稀有金属材料与工程,2013,42(9):1921-1925.

Li J, Li F G, Xue F M, et al. Fracture toughness and influencing factor for 7050 high strength aluminum alloy[J]. Rare Metal Materials and Engineering,2013,42(9):1921-1925.

[2]王亚荣,黄文荣,莫仲海,等.2A14高强铝合金电子束焊接头缺陷分析[J].焊接学报,2013,34(3):109-112.

Wang Y R, Huang W R, Mo Z H, et al. Defects in 2A14 aluminum alloy electron beam welded joints[J]. Transactions of the China Welding Institution,2013,34(3):109-112.

[3]田志凌,许良红,彭云,等.高强铝合金焊接接头无析出物区的形成机理[J].金属学报,2008,44(1):91-97.

Tian Z L, Xu L H, Peng Y, et al. Formation mechanism of the precipitate-free zone in high strength aluminum alloy welds[J]. Acta Metallurgica Sinica,2008,44(1):91-97.

[4]翟希梅,孙丽娟,赵远征,等.高强铝合金压弯构件稳定承载力中欧规范对比[J].哈尔滨工业大学学报,2015,47(12):1-8.

Zhai X M,Sun L J,Zhao Y Z, et al. Comparison of Chinese code and Eurocode in calculating the stability bearing capacity of high strength aluminum alloy beam-columns[J]. Journal of Harbin Institute of Technology,2015,47(12):1-8.

[5]蹇海根,姜锋,郑秀媛,等.采用EBSD研究高强铝合金的疲劳裂纹扩展行为[J].材料热处理学报,2011,32(2):75-80.

Jian H G, Jiang F, Zheng X Y, et al. EBSD analysis of propagation behaviour of fatigue cracks in high strength aluminum alloy[J]. Transactions of Materials and Heat Treatment,2011,32(2):75-80.

[6]王凡,房湛,徐琛,等.异种高强铝合金间搅拌摩擦焊接头组织与性能研究[J].航空材料学报,2015,35(1):33-38.

Wang F, Fang Z, Xu C, et al. Microstructure and mechanical properties of FSW joints between dissimilar high-strength aluminum alloys [J]. Journal of Aeronautical Materials,2015,35(1):33-38.

[7]宋友宝,杨新岐,崔雷,等.异种高强铝合金搅拌摩擦焊搭接接头的缺陷和拉伸性能[J].中国有色金属学报, 2014, 18(5): 1167-1174.

Song Y B, Yang X Q, Cui L, et al. Defects and tensile properties of friction stir welded lap joints for dissimilar high-strength aluminum alloys[J]. The Chinese Journal of Nonferrous Metals,2014,18(5):1167-1174.

[8]佘欢,疏达,储威,等.Fe和Si杂质元素对7×××系高强航空铝合金组织及性能的影响[J].材料工程,2013,22(6):92-98.

She H, Shu D, Chu W, et al. Effects of Fe and Si impurities on the microstructure and properties of 7××× high strength aircraft aluminum alloys[J]. Journal of Materials Engineering,2013,22(6):92-98.

[9]张香丽,许晓静,凌智勇, 等.含锆锶Al-Zn-Mg-Cu系高强铝合金热处理工艺的优化[J].稀有金属,2016, 40(9):864-871.

Zhang X L, Xu X J, Ling Z Y, et al. Optimization of high-strength Al-Zn-Mg-Cu series aluminum alloy with Zr and Sr additions by heat treatment [J]. Chinese Journal of Rare Metals,2016,40(9):864-871.

[10]李兵,李忠文,刘伟, 等.7050铝合金热变形程度对再结晶及其性能的影响[J].锻压技术,2017, 42(12):128-134.

Li B, Li Z W, Liu W, et al. Influence of hot deformation degree on recrystallization and properties of aluminum alloy 7050 [J]. Forging & Stamping Technology 2017, 42(12):128-134.

[11]李春梅.Al-Zn-Mg-Cu系超高强铝合金热处理工艺的研究[D]. 重庆：西南师范大学, 2005.

Li C M. Research on Heat Treatment Process of Al-Zn-Mg-Cu Series Super High Strength Aluminum Alloys [D]. Chongqing: Southwestern Normal University, 2005.

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