冷轧变形量对7A75铝合金组织性能的影响

doi:10.13251/j.issn.0254-6051.2020.10.008

金属热处理 ›› 2020, Vol. 45 ›› Issue (10): 40-43.DOI: 10.13251/j.issn.0254-6051.2020.10.008

冷轧变形量对7A75铝合金组织性能的影响

朱鹏程^1,2, 刘文文¹, 张彦芝¹, 姜亚琳¹, 姜丽军¹

1.烟台南山学院工学院, 山东烟台 265713;
2.山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心, 山东烟台 265700

收稿日期:2020-03-20 出版日期:2020-10-25 发布日期:2020-12-29
作者简介:朱鹏程(1974—),男,副教授,学士,主要研究方向为材料组织性能,E-mail: 13385357950@163.com
基金资助:
山东省高等学校青创科技计划(2019KJA019);山东省重点研发计划(2019GGX102025)

Effect of cold rolling deformation on microstructure and properties of 7A75 aluminum alloy

Zhu Pengcheng^1,2, Liu Wenwen¹, Zhang Yanzhi¹, Jiang Yalin¹, Jiang Lijun¹

1. College of Engineering, Yantai Nanshan University, Yantai Shandong 265713, China;
2. National Engineering Research Center for Plastic Working of Aluminum Alloys, Shandong Nanshan Aluminum Co., Ltd., Yantai Shandong 265700, China

Received:2020-03-20 Online:2020-10-25 Published:2020-12-29

摘要/Abstract

摘要： 研究了冷轧变形对7A75铝合金微观组织和力学性能的影响,并探讨了第二相粒子促进形核的机制。采用光学显微镜(OM)和透射电镜(TEM)观察了微观组织,采用万能拉伸试验机测试了力学性能,采用板材成形试验机测试了杯突值(IE)。结果表明:随冷变形量的增大,7A75铝合金的强度和伸长率均逐渐增大,且屈服强度的升高幅度大于抗拉强度。50%冷变形时屈服强度和抗拉强度分别达到435 MPa和460 MPa,与未经冷变形时相比分别提高了190 MPa和110 MPa,同时伸长率提高到14%。杯突IE值与伸长率的变化规律一致。30%、50%和70%的冷变形下,基体晶粒平均尺寸分别为31.5、13.5和13.0 μm,冷变形量越大,基体晶粒尺寸越细小越均匀。过时效处理后,7A75铝合金中的MgZn₂粒子尺寸大于0.5 μm时,在冷变形后的固溶处理过程中为再结晶提供形核位置;而50~100 nm之间的粒子钉扎在晶界处,有效地抑制了再结晶晶粒的长大。

关键词: 7A75铝合金, 冷轧, 微观组织, 粒子诱导形核效应

Abstract: Effect of cold rolling deformation on microstructure and mechanical properties was investigated, the mechanism of second phase particles simulated nucleation was discussed. The microstructure was characterized by using OM and TEM. The mechanical properties were tested by using tension tester machine. The IE value was tested by using sheet forming test machine. The results indicate that the strength and elongation increases with the increase of deformation, and the increase rate of yield strength is higher than tensile strength. When the deformation is 50%, the yield strength and tension strength reach 435 MPa and 460 MPa respectively, which have an increase of 190 MPa and 110 MPa respectively compared to those without deformation. Meanwhile, the elongation increases to 14%, and the IE value also increases with the increase of deformation. When the deformation is 30%, 50% and 70%, the average grain size is about 31.5, 13.5 and 13.0 μm respectively, which shows that the greater the deformation, the smaller and more uniform the matrix grain size. The precipitation phase MgZn₂ lager than 0.5 μm simulates the nucleation of recrystallization grain after cold rolling process during the solution treatment, while the ones which has the size of 50-100 nm pins the grain boundaries and inhibits the growth of recrystallization grains.

Key words: 7A75 aluminum alloy, cold rolling, microstructure, precipitation simulated nucleation effect

中图分类号:

TG156.1

朱鹏程, 刘文文, 张彦芝, 姜亚琳, 姜丽军. 冷轧变形量对7A75铝合金组织性能的影响[J]. 金属热处理, 2020, 45(10): 40-43.

Zhu Pengcheng, Liu Wenwen, Zhang Yanzhi, Jiang Yalin, Jiang Lijun. Effect of cold rolling deformation on microstructure and properties of 7A75 aluminum alloy[J]. Heat Treatment of Metals, 2020, 45(10): 40-43.

参考文献

[1]Miller W S, Zhuang L, Bottema J, et al. Recent development in aluminum alloys for the automotive industry[J]. Materials Science and Engineering A, 2000, 280(1): 37-49.
[2]Hirsch J. Recent development in aluminum for automotive applications[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(7): 1995-2002.
[3]刘钊扬, 熊柏青, 张永安, 等. 汽车车身板用6A16铝合金拉深深成形金属流动和微观组织相关性研究[J]. 材料导报, 2020, 34(8): 8119-8125.
Liu Zhaoyang, Xiong Baiqing, Zhang Yongan. Study on correlation between metal flow and microstructure of deep drawing test of 6A16 aluminum alloy for automobile body panel[J]. Materials Review, 2020, 34(8): 8119-8125.
[4]Markushev M V. On the principles of the deformation methods of aluminum-alloys grain refinement to ultrafine size: I. Fine-grained alloys[J]. The Physics of Metals and Metallography, 2009, 108(1): 43-49.
[5]Engler O, Hirsch J. Texture control by thermomechanical processing of AA6xxx Al-Mg-Si sheet alloys for automotive applications-A review[J]. Materials Science and Engineering A, 2002, 336(1/2): 249-262.
[6]Bennett T A, Petrov R H, Kestens L A I. Effect of particles on texture banding in an aluminium alloy[J]. Scripta Materialia, 2010, 62(2): 78-81.
[7]Di Russo E, Conserva M, Buratti M, et al. A new thermo-mechanical procedure for improving the ductility and toughness of Al-Zn-Mg-Cu alloys in the transverse directions[J]. Materials Science and Engineering, 1974, 14(1): 23-36.
[8]Lademo O G, Pedersen K O, Berstad T, et al. An experimental and numerical study on the formability of textured AlZnMg alloys[J]. European Journal of Mechanics A, 2008, 27(2): 116-140.
[9]Tajally M, Emadoddin E. Mechanical and anisotropic behaviors of 7075 aluminum alloy sheets[J]. Materials and Design, 2011, 32(3): 1594-1599.
[10]Jiang F L, Zurob H S, Purdy G R, et al. Characterizing precipitate evolution of an Al-Zn-Mg-Cu based commercial alloy during artificial aging and non-isothermal heat treatments by in situ electrical resistivity monitoring[J]. Materials Characterization, 2016, 117: 47-56.
[11]Guo W, Guo J Y, Wang J D, et al. Evolution of precipitate microstructure during stress aging of an Al-Zn-Mg-Cu alloy[J]. Materials Science and Engineering A, 2015, 634: 167-175.
[12]徐长征, 王庆娟, 黄美权, 等. 冷变形Cu-0.36Cr(wt%)合金的抗软化性能和再结晶行为[J]. 金属热处理, 2007, 32(5): 38-42.
Xu Changzheng, Wang Qingjuan, Huang Meiquan, et al. Softening resistant performance and recrystallization behavior of cold-deformed Cu-0.36Cr(wt%) alloy[J]. Heat Treatment of Metals, 2007, 32(5): 38-42.
[13]Kumar M, Ross N G. Influence of temper on the performance of a high-strength Al-Zn-Mg alloy sheet in the warm forming processing chain[J]. Journal of Materials Processing Technology, 2016, 231: 189-198.
[14]Ghiaasiaan R, Amirkhiz B S, Shankar S. Quantitative metallography of precipitating and secondary phases after strengthening treatment of net shaped casting of Al-Zn-Mg-Cu (7000) alloys[J]. Materials Science and Engineering A, 2017, 698: 206-217.

[1]	陈保安, 张静媛, 祝志祥, 韩钰, 潘学东, 张磊, 陈素红. 化学成分对高强Al-Mg-Si合金组织和性能的影响[J]. 金属热处理, 2022, 47(4): 30-38.
[2]	陈东俊, 李广阳, 刘刚. 时效处理对AlSi9Cu3压铸铝合金组织和力学性能的影响[J]. 金属热处理, 2022, 47(4): 53-56.
[3]	李立, 曾艳, 吴晓春. 4Cr5Mo2VCo钢的热处理工艺优化[J]. 金属热处理, 2022, 47(4): 133-140.
[4]	张骥俊, 邢彦锋, 曹菊勇. 超声振动对CMT电弧增材制造铝合金组织与性能的影响[J]. 金属热处理, 2022, 47(4): 159-164.
[5]	杨春苗, 王珊, 王淑慧, 李延珍, 刘文文. RRA过程中预时效时间对7A85铝合金组织性能的影响[J]. 金属热处理, 2022, 47(3): 44-47.
[6]	王国迪, 景然, 张曼雪, 冯甜, 余国庆, 解念锁. 冷轧变形量及再结晶对TC4合金组织与性能的影响[J]. 金属热处理, 2022, 47(3): 48-52.
[7]	陈善勇, 王快社, 乔柯, 王文. 碱热处理对搅拌摩擦加工AZ31镁合金耐腐蚀性能的影响[J]. 金属热处理, 2022, 47(3): 61-66.
[8]	梅金娜, 姜凤阳, 卫娜, 刘浪浪, 思芳, 刘松涛, 王俊勃, 刘江南. 轧制变形对高熵合金微观组织和力学性能的影响[J]. 金属热处理, 2022, 47(3): 67-71.
[9]	叶拓, 唐明, 刘吉兆, 刘伟, 吴远志, 刘巍, 徐文. 固溶温度对7075铝合金板材组织与力学性能的影响[J]. 金属热处理, 2022, 47(3): 119-123.
[10]	叶拓, 何玉兵, 何文鹏, 刘巍, 袁浩登, 吴远志, 刘伟, 刘吉兆. 轧制态6082-T6铝合金的热压缩力学行为及微观组织分析[J]. 金属热处理, 2022, 47(2): 26-30.
[11]	赵彦乐, 邹宇明, 丁桦. C含量对冷轧Fe-6Mn-1Al中锰钢组织与性能的影响[J]. 金属热处理, 2022, 47(2): 35-40.
[12]	闵旭东, 黄元春, 肖政兵, 刘宇, 任贤魏, 邹倜. 预处理对汽车用Al-Mg-Si合金组织和晶间腐蚀行为的影响[J]. 金属热处理, 2022, 47(2): 78-85.
[13]	刘跃, 韩顺, 厉勇, 王春旭, 严晓红, 李建新. 淬火温度对GE1014超高强度钢组织及性能的影响[J]. 金属热处理, 2022, 47(2): 125-129.
[14]	俞波, 张宜, 王占业, 柴立涛. 连续退火工艺对4.5%Cr冷轧耐候钢组织性能的影响[J]. 金属热处理, 2022, 47(2): 137-140.
[15]	董瑞, 陈林, 岑耀东, 包喜荣. 不同热处理条件下贝氏体钢的微观组织和疲劳裂纹扩展[J]. 金属热处理, 2022, 47(2): 153-158.

冷轧变形量对7A75铝合金组织性能的影响

Effect of cold rolling deformation on microstructure and properties of 7A75 aluminum alloy

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价