锻压技术

固溶温度对粉末触变锻造制备2024铝合金组织和力学性能的影响

英文标题：Influence of solution temperature on microstructure and mechanical properties of 2024 aluminum alloy produced by powder thixoforging

作者：王张军陈体军

单位：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室

关键词：粉末触变锻造 2024铝合金固溶温度显微组织力学性能

分类号：粉末触变锻造；2024铝合金；固溶温度；显微组织；力学

出版年,卷(期):页码：2018,43(10):30-35

摘要：

采用一种新型的粉末触变锻造技术制备了2024铝合金，采用光学显微镜（OM）、扫描电镜（SEM）和X射线衍射（XRD）等分析手段，研究了固溶温度对粉末触变锻造2024铝合金和金属型铸造2024铝合金显微组织和力学性能的影响。研究表明：随着固溶温度的升高，粉末触变锻造2024铝合金的抗拉强度、屈服强度、伸长率都逐渐增加，在490 ℃×3 h时，综合力学性能达到最佳，其抗拉强度、屈服强度和伸长率分别为350 MPa,270 MPa和17.5%；金属型铸造2024铝合金最佳固溶工艺为490 ℃×12 h，其抗拉强度、屈服强度和伸长率分别达到320 MPa,245 MPa和15.2%；相比金属型铸造2024铝合金，粉末触变锻造2024铝合金的抗拉强度、屈服强度和伸长率分别提高了9.4%，10.2%和15.1%。

2024 aluminum alloy was produced by a new type of powder thixoforging method, and the influences of solution temperature on microstructure and mechanical properties of powder thixoforging and casting 2024 aluminum alloys were studied by optical microscope (OM), scanning electron microscope(SEM) and Xray diffraction (XRD). The results show that the tensile strength, yield strength and elongation rate of powder thixoforging 2024 aluminum alloy increase gradually with the increasing of solution temperature, and the comprehensive mechanical properties achieve the best at 490 ℃×3 h with the tensile strength of 350 MPa, the yield stress of 270 MPa and the elongation rate of 17.5%. However, the best solution technology of casting 2024 aluminum alloy is at 490 ℃×12 h, and its tensile strength, yield strength and elongation rate are 320 MPa, 245 MPa,15.2%, respectively. Comparing with casting 2024 aluminum alloy, the tensile strength, yield strength, and elongation rate of powder thixoforging 2024 aluminum alloy are increased by 9.4%, 10.2%, 15.1%, respectively.

基金项目：

甘肃省高校基本科研经费资助项目（G2014-07）;高校新世纪优秀人才资助项目（NCET-10-0023）

王张军（1992-），男，硕士研究生，E-mail：wangzj4991@163.com；通讯作者：陈体军（1971-），男，博士，博士生导师，E-mail：chentj1971@126.com

参考文献：

[1]陈宇强,易丹青,潘素平,等.温度对2024铝合金蠕变行为的影响[J].中国有色金属学,2010,20(4):632-639.

Chen Y Q, Yi D Q, Pan S P, et al. Effect of temperature on creep behavior of 2024 aluminum alloy[J].The Chinese Journal of Nonferrous Metals, 2010,20(4):632-639.

[2]赵婷,邓磊,王新云.2024铝合金板材高温拉伸流变行为和微观组织演化研究[J].精密成形工程,2015,7(3):37-42.

Zhao T, Deng L, Wang X Y. Flow behavior and microstructure evolution of 2024 aluminum alloy sheet during hot tension deformation[J].Journal of Netshape Forming Engineering, 2015, 7(3):37-42.

[3]陈跃良,段成美,吕国志.军用飞机日历寿命预测技术研究现状及关键技术问题[J].中国工程科学,2002,4(4):69-70.

Chen Y L, Duan C M, Lyu G Z. Current status and key technique of predictive technique for calendric life of military aircraft[J].Engineering Science,2002,4(4):69-70.

[4]刘峤,肖来荣,张宏领,等.稀土La对2024铝合金铸态组织的影响[J].矿冶工程,2014,34(5):134-136.

Liu Q, Xiao L R, Zhang H L, et al. Effect of lanthanum on as-cast microstructure of 2024 aluminum alloy[J].Mining and Metallurgical Engineering, 2014,34(5):134-136.

[5]郭奕文, 邓运来, 王宇,等. 2024铝合金航空座椅支承零件等温模锻成形研究[J]. 锻压技术, 2016, 41(8):12-17.

Guo Y W, Deng Y L, Wang Y, et al. Study on isothermal mould forging for aviation seat supporting parts of aluminum alloy 2024[J]. Forging & Stamping Technology, 2016, 41(8):12-17.

[6]王荣滨.铸造铝合金缺陷分析与热处理工艺研究[J].有色金属加工,2008,37(5):10-13.

Wang R B. Study on defects analysis and heat treatment of cast aluminum alloys[J].Nonferrous Metals Processing,2008,37(5):10-13.

[7]Kleiner S, Beffort O, Fuchs M, et al. Thixocasting of Mg-Al alloys using extruded feedstock material[A]. Proceedings of the 7th International Conference on Semi-Solid Processing of Alloys and Composites[C].Japan,Tsukuba,2002.

[8]Aguilar J, Fehlbier M, Rettemeier G. Development of new Mg-alloys for the thixomolding process[A]. Proceedings of the 7th International Conference on Semi-Solid Processing of Alloys and Composites[C].Japan,Tsukuba,2002.

[9]Ramesh C, Sakai T, Kamado S, et al. Semi-solid forming of Mg-Li-Al-Ca light metal alloys[J]. Journal of Japan Institute of Light Metals, 1998, 48(1):13-18.

[10]刘政,赵素,雷蕾.金属半固态加工技术的应用与进展[J].上海有色金属,2005,26(2):79-85.

Liu Z, Zhao S, Lei L. Progress and applications of technology of semi-solid processing of metals[J].Shanghai Nonferrous Metals, 2005, 26(2): 79-85.

[11]王德升, 魏少华, 樊建中,等. 固溶处理对SiCp/Al-Cu-Mg复合材料组织和性能的影响[J]. 稀有金属, 2016, 40(2):125-131.

Wang D S, Wei S H, Pan J Z, et al. Microstructure and properties of SiCp/Al-Cu-Mg composites with solution treatment [J].Chinese Journal of Rare Metals, 2016, 40(2):125-131.

[12]Schueller R D, Wawner F E, Sachdev A K. Nucleation mechanism of the cubic σ phase in squeeze-cast aluminium matrix composites[J].Journal of Materials Science,1994,29(2):424-435.

[13]何晓磊,李沛勇,李伟.固溶处理对一种2xxx/SiCp铝基复合材料组织和性能的影响[J].航空材料学报,2010,30(4):21-25.

He X L, Li P Y, Li W. Effect of solid solution heat treatment on microstructure and mechanical properties of 2xxx/SiCp aluminum matrix composite [J]. Journal of Aeronautical Materials,2010,30(4):21-25.

服务与反馈：

【文章下载】【加入收藏】