锻压技术

5A90 Al-Li合金桁条电流自阻加热成形技术

英文标题：Current resistance heating forming technology of Al-Li alloy 5A90 stringers

作者：肖寒张凯锋姜巨福王博易卓勋赖小明

分类号：TG307

出版年,卷(期):页码：2017,42(7):66-71

摘要：

Al-Li合金具有密度低、比强度高等优点，是实现飞行器结构减重的理想材料，在航天航空领域显示出了广阔的应用前景。先进的电加热成形技术是提高轻质合金成形性能的有效手段。通过高温拉伸实验研究了5A90 Al-Li合金的成形性能，确定了5A90 Al-Li合金的最佳成形温度为340 ℃。通过电流自阻加热升温实验，得到了加热5A90 Al-Li合金板材合适的电流密度为10 A·mm-2。针对5A90 Al-Li合金室温成形性能差的问题，设计并制造了5A90 Al-Li合金桁条电流自阻加热成形装置，在此装置上进行了5A90 Al-Li合金桁条的电加热成形实验，得到了符合要求的桁条零件，并分析了温度、润滑条件等对成形质量的影响。这种新型的板材电流自阻加热成形工艺及装备具有较大的实际应用价值。

Al-Li alloy with advantages of low density, high specific strength etc.is the desirable material to realize the weight loss for aircraft structure, which shows strong competitiveness and broad application prospect in the field of aerospace and aviation. The advanced electrical heating forming technology is an effective way to improve the formability of light alloy. Therefore, the formability of Al-Li alloy 5A90 was studied by high temperature tensile experiment. And the best forming temperature of Al-Li alloy 5A90 sheet is 340 ℃.Then, the appropriate current density of Al-Li alloy 5A90 sheet under heating is 10 A·mm-2, which is obtained by the current resistance heating experiment. Furthermore, the device of current resistance heating forming for Al-Li alloy 5A90 stringers was designed and produced to solve the problem of poor formability at room temperature. The Al-Li alloy 5A90 stringers were formed by the current resistance heating forming process to meet the requirements, and the influences of temperature, lubrication and other factors on the quality of Al-Li alloy 5A90 stringers were analyzed. Thus, the new current resistance heating forming process and corresponding devices for sheets have great significance in practical application.

基金项目：

国家自然科学基金资助项目（51675125）；“高档数控机床与基础制造装备”科技重大专项（2014ZX04001-171）

作者简介：肖寒(1990-)，男，博士研究生，E-mail：vildenceline@126.com；通讯作者：张凯锋（1951-），男，博士，教授，E-mail：kfzhanghit@163.com

参考文献：

[1]郑晖，赵曦雅. 汽车轻量化及铝合金在现代汽车生产中的应用[J]. 锻压技术，2016, 41(2)：1-6.

Zheng H, Zhao X Y. Lightweight automobile and application of aluminum alloys in modern automobile production[J]. Forging & Stamping Technology, 2016, 41(2):1-6.

[2]Li L, Zhou J, Duszczyk J. Determination of a constitutive relationship for AZ31B magnesium alloy and validation through comparison between simulated and real extrusion[J]. Journal of Materials Processing Technology, 2006, 172(3): 372-380.

[3]Li L, Zhou J, Duszczyk J. FEM simulation study of the effects of the ram speed on the exit temperature during the extrusion process of 7075 alloy[J]. Journal of Materials Processing Technology, 2004, 145(3): 360-370.

[4]王永，胡捷，胡国平，等. 可焊铝锂合金焊接研究现状[J]. 有色金属，2002，54(1)：16-18.

Wang Y, Hu J, Hu G P, et al. Welding research and development of weldable aluminum-lithium alloys[J]. Nonferrous Metals, 2002, 54(1): 16-18.

[5]李劲风，郑子樵，陈永来，等. 铝锂合金及其在航天工业上的应用[J]. 宇航材料工艺，2012, 42(1)：13-19.

Li J F, Zheng Z Q, Chen Y L, et al. Al-Li alloys and their application in aerospace industry[J]. Aerospace Materials and Technology, 2012, 42 (1): 13-19.

[6]Conrad H. Effects of electric current on solid state phase transformations in metals[J]. Materials Science and Engineering: A, 2000, 287(2): 227-237.

[7]Heigel J C, Andrawes J S, Roth J T, et al. Viability of electrically treating 6061 T6511 aluminum for use in manufacturing processes[J]. Transactions of the North American Manufacturing Research Institute of SME, 2005, 33: 145-152.

[8]李超. 轻合金板材脉冲电流辅助超塑成形工艺及机理研究[D]. 哈尔滨：哈尔滨工业大学，2012.

Li C. Processing and Mechanism of Pulse Current Auxiliary Superplastic Forming of Light Alloy Sheets[D]. Harbin: Harbin Institute of Technology, 2012.

[9]Salandro W, Jones J, Bunget C, et al. Electrically Assisted Forming: Modeling and Control[M]. Springer, 2015.

[10]Mori K, Maeno T, Yamada H, et al. 1-Shot hot stamping of ultra-high strength steel parts consisting of resistance heating, forming, shearing and die quenching[J]. International Journal of Machine Tools and Manufacture, 2015, 89: 124-131.

[11]Mori K, Maki S, Tanaka Y. Warm and hot stamping of ultra high tensile strength steel sheets using resistance heating[J]. CIRP Annals-Manufacturing Technology, 2005, 54(1): 209-212.

[12]Mori K. Smart hot stamping of ultra-high strength steel parts[J]. Transactions of Nonferrous Metals Society of China, 2012, 22: 496-503.

[13]Yanagimoto J, Izumi R. Continuous electric resistance heating-hot forming system for high-alloy metals with poor workability[J]. Journal of Materials Processing Technology, 2009, 209(6): 3060-3068.

[14]Tang G, Zhang J, Yan Y, et al. The engineering application of the electroplastic effect in the cold-drawing of stainless steel wire[J]. Journal of Materials Processing Technology, 2003, 137(1): 96-99.

[15]Xu Z, Tang G, Tian S, et al. Research of electroplastic rolling of AZ31 Mg alloy strip[J]. Journal of Materials Processing Technology, 2007, 182(1): 128-133.

[16]Yan Z, Chen G, Fu X, et al. Effect of electropulsing on deformation behavior of Ti-6Al-4V alloy during cold drawing[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(4): 1012-1021.

[17]Li M Q, Liu Y L, Wu S C, et al. Superplastic deformation of duralumin LY12CZ under an electric field[J]. Journal of Materials Processing Technology, 1994, 40(3-4): 385-393.

[18]肖寒. 5A90 Al-Li合金桁条自阻加热成形工艺与装备[D]. 哈尔滨：哈尔滨工业大学,2015.

Xiao H. Resistance Heating Forming Processes and Equipments of 5A90 Al-Li Alloy Stringers[D]. Harbin: Harbin Institute of Technology, 2015.

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