锻压技术

铸态2219铝合金热压缩变形组织演变规律

英文标题：Microstructure evolution law of ascast 2219 aluminum alloy in hot compression deformation

作者：张曼曼朱凯张文学阳代军周世杰

分类号：TG316.2

出版年,卷(期):页码：2021,46(1):191-196

摘要：

为解决2219铝合金微观组织粗大、第二相分布不均的问题，开展了对铸态2219铝合金热压缩变形组织演变规律的研究。研究结果表明，经热压缩变形后，铸态2219铝合金组织中粗大的晶粒及连续网状分布的残余结晶相被打碎，经热处理后形成了均匀的再结晶组织。随着变形温度的升高，晶粒组织粗化，但Al2Cu相的分布更细小、均匀；随着变形量的增大，晶粒组织逐渐细化，晶粒大小分布也更均匀，且Al2Cu相也随变形量的增加破碎得更充分，分布更细小、均匀。在大直径铸锭锻造开坯过程中，为了获得Al2Cu相细化分布的组织，变形温度应控制在420 ℃以上，单次变形量不应低于50%。延长锻后保温时间不会显著影响材料的显微组织，因此，在锻造开坯过程中，为了保证合理的变形温度区间，可以采用回炉加热多火次锻造的方式。

In order to solve the problems of coarse microstructure and uneven distribution of the second phase in 2219 aluminum alloy, the microstructure evolution laws during hot compression deformation of as-cast 2219 aluminum alloy were studied. The results show that after hot compression deformation, the coarse grains and the residual crystalline phase distributed as continuous network in the as-cast 2219 aluminum alloy structure are broken, and the uniform recrystallization structure is formed after heat treatment. With the increasing of deformation temperature, the grain structure is coarser, but the distribution of Al2Cu phase is more fine and uniform. With the increasing of deformation amount, the grain structure is gradually refined, the grain size distribution is more uniform, and Al2Cu phase is also broken more fully and the distribution is small and uniform. Furthermore, during the forging and cogging process of large diameter ingot, in order to obtain microstructure with uniform and fine Al2Cu phase, the deformation temperature should be controlled above 420 ℃, and the single deformation amount should not be less than 50%. In addition, the microstructure of material is not significantly affected by extending the holding time after forging. Thus, during the forging and cogging process, the method of reheating and forging with multiple fires is used to ensure the reasonable deformation temperature range.

基金项目：

基金项目:民用航天“十三五”预研项目（B0109）

作者简介：张曼曼（1990-），女，硕士，工程师 E-mail：beyond90ah@163.com

参考文献：

[1]丁俊峰, 张行健, 陈永来, 等. 热处理工艺对2219铝合金旋压件力学性能的影响研究[J]. 热加工工艺, 2016, 45(12): 233-236.

Ding J F, Zhang X J, Chen Y L, et al. Effects of heat treatment on mechanical properties of 2219 aluminum alloy spinning [J]. Hot Working Technology, 2016, 45(12): 233-236.

[2]黄元春, 陈鹏冲, 刘宇. 2219铝合金热变形行为的研究[J]. 热加工工艺, 2016, 45(6): 87-90.

Huang Y C, Chen P C, Liu Y. Research on hot deformation behavior of 2219 aluminum alloy [J]. Hot Working Technology, 2016, 45(6): 87-90.

[3]周广文. 推进剂贮箱优化设计的思考[J]. 导弹与航天运载技术, 2011,(1): 26-28.

Zhuo G W. Optimal structure design for launch vehicle tank [J]. Missiles and Space Vehicles, 2011,(1): 26-28.

[4]肖亚庆, 谢水生,刘静安,等.铝加工技术实用手册[M]. 北京: 冶金工业出版社, 2005.

Xiao Y Q, Xie S S, Liu J A, et al. Aluminum Processing Technical Manual [M]. Beijing: Metallurgical Industry Press, 2005

[5]刘记伟, 巩全军. 2219合金大型锻环热处理工艺及淬火尺寸变化规律研究[J].轻合金加工技术, 2014, 42(5): 53-57.

Liu J W, Gong Q J. Research on the heat treatment technology and the changing rules of dimensions after quenching of 2219 aluminum alloy large forging rings [J]. Light Alloy Fabrication Technology, 2014, 42(5): 53-57.

[6]龚习, 王恒强, 付敏敏, 等. 航空航天用AlCuMn 系高强铝合金的研究进展[J]. 热加工工艺, 2015, 44(22): 6-10.

Gong X, Wang H Q, Fu M M, et al. Research development of highstrength AlCuMn series aluminum alloy used for aviation and aerospace [J]. Hot Working Technology, 2015, 44(22): 6-10.

[7]Shanmugasundaram T, Murty B S, Sarma V S. Development of ultrafine grained high strength AlCu alloy by cryorolling [J]. Scripta Materialia, 2006, 54 (12): 2013-2017.

[8]Wang H, Yi Y, Huang S. Influence of predeformation and subsequent ageing on the hardening behavior and microstructure of 2219 aluminum alloy forgings [J]. Journal of Alloys and Compounds, 2016, 685: 941-948.

[9]Yang Y, Zhan L, Ma Q, et al. Effect of predeformation on creep age forming of AA2219 plate: Springback, microstructures and mechanical properties [J]. Journal of Materials Processing Technology, 2016, 229: 697-702.

[10]张文学, 徐坤和, 阳代军, 等. 大规格2219铝合金圆铸锭锻造开坯与质量分析[J]. 航天制造技术, 2015, 12(6): 7-14.

Zhang W X, Xu K H, Yang D J, et al. Analysis on process and quality of forgingcogging for large size 2219 aluminum alloy round ingot [J]. Aerospace Manufacturing Technology, 2015, 12(6): 7-14.

[11]李周兵, 闫亮明, 沈健. 热轧变形量对7055铝合金组织与力学性能的影响[J]. 特种铸造及有色合金, 2013, 33(1): 1-4.

Li Z B, Yan L M, Shen J. Effect of hot rolled reduction on microstructure and mechanical properties of 7055 aluminum alloy [J]. Special Casting and Nonferrous Alloys, 2013, 33(1): 1-4.

[12]Kaibyshev R, Sitdikov O, Mazurina I, et al. Deformation behavior of a 2219 Al alloy [J]. Materials Science and Engineering: A, 2002, 334(1): 104-113.

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