时效对铸造Al-Si-Cu-Mg合金力学性能和耐蚀性能的影响

doi:10.13251/j.issn.0254-6051.2024.09.024

金属热处理 ›› 2024, Vol. 49 ›› Issue (9): 152-157.DOI: 10.13251/j.issn.0254-6051.2024.09.024

时效对铸造Al-Si-Cu-Mg合金力学性能和耐蚀性能的影响

夏琳燕¹, 史湘琴^1,2, 刘逸卿^1,2, 周模豪¹, 邓蔚¹

1.长沙学院机电工程学院, 湖南长沙 410022;
2.武汉理工大学材料科学与工程学院, 湖北武汉 100083

收稿日期:2024-03-07 修回日期:2024-07-03 出版日期:2024-09-25 发布日期:2024-10-29
作者简介:夏琳燕(1987—),女,讲师,博士,主要研究方向为铝硅合金强韧化和耐损伤机理,E-mail: xialinyan87614@163.com
基金资助:
湖南省教育厅科学研究项目(21C0757)

Effect of aging on mechanical properties and corrosion resistance of Al-Si-Cu-Mg cast alloy

Xia Linyan¹, Shi Xiangqin^1,2, Liu Yiqing^1,2, Zhou Mohao¹, Deng Wei¹

1. School of Mechanical and Electrical Engineering, Changsha University, Changsha Hunan 410022, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan Hubei 100083, China

Received:2024-03-07 Revised:2024-07-03 Online:2024-09-25 Published:2024-10-29

摘要/Abstract

摘要： 研究了单级、双级时效对铸造Al-Si-Cu-Mg合金显微组织、力学性能和耐腐蚀性能的影响。结果表明,铸造Al-Si-Cu-Mg合金时效后的显微组织主要由α-Al基体和共晶Si相构成。单级时效处理(170 ℃×10 h)后合金的峰值硬度为151.8 HV0.1,抗拉强度和屈服强度分别为287和252 MPa,伸长率为10.6%,但其耐腐蚀性能较差,最大晶间腐蚀深度达到113.3 μm。与单级时效相比,双级时效(90 ℃×3 h+170 ℃×4 h)可显著改善铸造Al-Si-Cu-Mg合金的力学性能和耐腐蚀性能,其峰值硬度提高了5.7%,抗拉强度和屈服强度分别提高了4.5%和6%,伸长率提高了两倍以上。此外,合金的耐腐蚀性能也得到了改善,最大晶间腐蚀深度为60.0 μm。合金获得较高力学性能和良好的耐腐蚀性能主要取决于均匀、细小的Si相,且灰黑色针状β相与黑色块状组织也相对较少。

关键词: 铸造Al-Si-Cu-Mg合金, 双级时效, 力学性能, 耐腐蚀性能

Abstract: Effect of aging treatment (single aging and two-step aging) on the microstructure, mechanical properties and corrosion resistance of Al-Si-Cu-Mg cast alloy was studied. The results show that the microstructure of the Al-Si-Cu-Mg cast alloy after aging is composed of α-Al matrix and eutectic Si phase. After single aging at 170 ℃ for 10 h, the peak hardness of the alloy is 151.8 HV0.1, the tensile strength and yield strength are 287 MPa and 252 MPa, respectively, and the elongation is 10.6%. However, the corrosion resistance is poor, and the maximum intergranular corrosion depth reaches 113.3 μm. As compared with that after the single aging, after the optimized two-step aging at 90 ℃ for 3 h and 170 ℃ for 4 h, the mechanical properties and corrosion resistance of the tested alloy are greatly improved. The peak hardness is increased by 5.7%, and the tensile strength and yield strength are increased by 4.5% and 6%, respectively. Moreover, the elongation is increased more than twice. The corrosion resistance improves, and the maximum intergranular corrosion depth is reduced to 60.0 μm. The fine and uniform Si phase and relatively less gray-black acicular β phase and black block structure are responsible for the improvement of mechanical properties and corrosion resistance of the tested alloy.

Key words: Al-Si-Cu-Mg cast alloy, two-step aging, mechanical properties, corrosion resistance

中图分类号:

TB31

夏琳燕, 史湘琴, 刘逸卿, 周模豪, 邓蔚. 时效对铸造Al-Si-Cu-Mg合金力学性能和耐蚀性能的影响[J]. 金属热处理, 2024, 49(9): 152-157.

Xia Linyan, Shi Xiangqin, Liu Yiqing, Zhou Mohao, Deng Wei. Effect of aging on mechanical properties and corrosion resistance of Al-Si-Cu-Mg cast alloy[J]. Heat Treatment of Metals, 2024, 49(9): 152-157.

参考文献

[1]熊俊杰, 冯志军, 李宇飞, 等. 高性能Al-Si-Cu-Mg铸造合金成分和热处理工艺设计[J]. 铸造, 2023, 72(6): 680-687.
Xiong Junjie, Feng Zhijun, Li Yufei, et al. Design of the composition and heat treatment process of high-performance Al-Si-Cu-Mg cast alloy[J]. Foundry, 2023, 72(6): 680-687.
[2]宋倩, 刘德华, 文超, 等. 铸造Al-Si-Cu-Mg合金多级时效工艺参数优化[J]. 轨道交通材料, 2023, 2(3): 46-50.
Song Qian, Liu Dehua, Wen Chao, et al. Parameter optimization of multi-step aging process for casting Al-Si-Cu-Mg alloy[J]. Materials for Rail Transportation System, 2023, 2(3): 46-50.
[3]杨兴国. 微量Mg元素对Al-Si-Cu合金铸件组织及力学性能的影响[J]. 汽车实用技术, 2023, 48(17): 128-133.
Yang Xingguo. Influence of trace Mg on the microstructure and mechanical properties of Al-Si-Cu alloy castings[J]. Automobile Applied Technology, 2023, 48(17): 128-133.
[4]赵乃勤. 热处理原理与工艺[M]. 北京: 机械工业出版社, 2016.
[5]Canyook R, Utakrut R, Wongnichakorn C, et al. The effects of heat treatment on microstructure and mechanical properties of rheocasting ADC12 aluminum alloy[J]. Materials Today: Proceedings, 2018, 5(3): 9476-9482.
[6]Abdi M, Shabestari S G. Novel high strength Al-10.5Si-3.4Cu-0.2Mg alloy produced through two-stage solution heat treatment[J]. Transaction of Nonferrous Metals Society of China, 2021, 31(3): 576-585.
[7]Zhang B R, Zhang L K, Wang Z M, et al. Achievement of high strength and ductility in Al-Si-Cu-Mg alloys by intermediate phase optimization in as-cast and heat treatment conditions[J]. Materials, 2020, 13(3) : 647.
[8]蓝凯, 杨弋涛. 铸造铝硅系合金的时效研究与应用进展[J]. 精密成形工程, 2022, 14(3): 124-132.
Lan Kai, Yang Yitao. Research and application progress on aging of cast Al-Si alloy[J]. Journal of Netshape Forming Engineering, 2022, 14(3): 124-132.
[9]韦鹤宇. Er、Zr微合金化对铸造Al-Si-Cu-Mg合金组织与性能的影响[D]. 南宁: 广西大学, 2015.
[10]吴雪丰. Al-Si-Cu-Mg合金强化“双峰”现象形成机理[D]. 沈阳: 沈阳工业大学, 2013.
[11]Wang Z X, Li H, Miao F F, et al. Improving the intergranular corrosion resistance of Al-Mg-Si-Cu alloys without strength loss by a two-step aging treatment[J]. Materials Science and Engineering A, 2014, 10: 267-273.
[12]Wang L, Zhang B P, Shinohara T, et al. Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions[J]. Materials and Design, 2010, 31(2): 857-863.

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时效对铸造Al-Si-Cu-Mg合金力学性能和耐蚀性能的影响

Effect of aging on mechanical properties and corrosion resistance of Al-Si-Cu-Mg cast alloy

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