Effect of Sb on eutectic Si and tensile properties of permanent mold cast ZL114A alloy

doi:10.13251/j.issn.0254-6051.2021.11.006

Abstract

Abstract: ZL114A alloy is a hypoeutectic Al-Si casting alloy independently developed in China, with eutectic Si modification being one of the most important methods to improve its comprehensive tensile properties at room temperature. Effect of Sb on microstructure and properties of the as-cast and heat-treated ZL114A alloy was studied by tensile test at room temperature and SEM observation. The results show that for the as-cast ZL114A alloy, the addition of Sb modifies the eutectic Si from plate-like to fibrous or granular. For the heat-treated ZL114A alloy, the addition of Sb makes the aspect ratio of eutectic Si smaller and the degree of spheroidization higher. The Sb addition can improve the comprehensive tensile properties of the ZL114A alloy at room temperature under the condition of permanent mold casting, the tensile strength and elongation of the ZL114A alloy with Sb addition after heat treatment are much higher than those required in the aviation standard of China. Comprehensive consideration of the morphologies of eutectic Si and the tensile properties at room temperature of the as-cast and heat-treated ZL114A alloy shows that, the optimal content of Sb is 0.09% (mass fraction).

Key words: hypoeutectic Al-Si alloy, permanent mold casting, Sb element, eutectic Si modification, modification

CLC Number:

TG223

Liu Dongyang, Yu Xiuyong, Gao Wenli, Lu Zheng, Mao Guoling. Effect of Sb on eutectic Si and tensile properties of permanent mold cast ZL114A alloy[J]. Heat Treatment of Metals, 2021, 46(11): 36-41.

References

[1]刘文祎, 徐聪, 刘茂文, 等. 稀土元素Gd对Al-Si-Mg铸造合金微观组织和力学性能的影响[J]. 材料工程, 2019, 47(6): 133-139.
Liu Wenyi, Xu Cong, Liu Maowen, et al. Effect of rare earth element Gd on microstructure and mechanical properties of Al-Si-Mg cast alloy[J]. Journal of Materials Engineering, 2019, 47(6): 133-139.
[2]Mao G, Yan H, Zhu C, et al. The varied mechanisms of yttrium (Y) modifying a hypoeutectic Al-Si alloy under conditions of different cooling rates[J]. Journal of Alloys and Compounds, 2019, 806: 909-916.
[3]熊梅. 热处理对Al-12Si建筑储能材料性能的影响分析[J]. 热加工工艺, 2014(20): 149-151.
Xiong Mei. Analysis on effect of heat treatment on properties of Al-12Si building energy storage materials[J]. Hot Working Technology, 2014(20): 149-151.
[4]Kocatepe K, Burdett C F. Effect of low frequency vibration on macro and micro structures of LM6 alloys[J]. Journal of Materials Science, 2000, 35(13): 3327-3335.
[5]Nafisi S, Emadi D, Shehata M T, et al. Effects of electromagnetic stirring and superheat on the microstructural characteristics of Al-Si-Fe alloy[J]. Materials Science & Engineering A, 2006, 432(1-2): 71-83.
[6]Hernández F C R, Sokolowski J H. Comparison among chemical and electromagnetic stirring and vibration melt treatments for Al-Si hypereutectic alloys[J]. Journal of Alloys and Compounds, 2006, 426(1-2): 205-212.
[7]Bian Xiufang, Wang Weimin, Qin Jingyu. Structure factors of modified liquid Al-Si alloys[J]. Science and Technology of Advanced Materials, 2001, 2(1): 19.
[8]Farahany S, Ourdjini A, Idris M H. The usage of computer-aided cooling curve thermal analysis to optimise eutectic refiner and modifier in Al-Si alloys[J]. Journal of Thermal Analysis & Calorimetry, 2012, 109(1): 105-111.
[9]Hansen S C, Loper C R. Effect of antimony on the phase equilibrium of binary Al-Si alloys[J]. Calphad, 2000, 24(3): 339-352.
[10]刘志虎, 周亚军, 李岗. 锑在铝硅合金中变质机理分析[J]. 铸造技术, 2006, 27(8): 845-846.
Liu Zhihu, Zhou Yajun, Li Gang. Analysis of modification mechanism of Sb in Al-Si alloy[J]. Foundry Technology, 2006, 27(8): 845-846.
[11]Farahany S, Ourdjini A, Idrsi M H, et al. Evaluation of the effect of Bi, Sb, Sr and cooling condition on eutectic phases in an Al-Si-Cu alloy (ADC12) by in situ thermal analysis[J]. Thermochimica Acta, 2013, 559: 59-68.
[12]Uzun O, Yilmaz F, Kölemen U, et al. Sb effect on micro structural and mechanical properties of rapidly solidified Al-12Si alloy[J]. Journal of Alloys & Compounds, 2011, 509(1): 21-26.
[13]Farahany Saeed, Ourdjini Ali. Effect of cooling rate and silicon refiner/modifier on solidification pathways of Al-11.3Si-2Cu-0.4Fe alloy[J]. Advanced Manufacturing Processes, 2013, 28(6): 657-663.
[14]Yu J M, Wanderka N, Rack A, et al. Influence of impurities, strontium addition and cooling rate on microstructure evolution in Al-10Si-0.3Fe casting alloys[J]. Journal of Alloys and Compounds, 2018, 766: 818-827.
[15]Xu C L, Wang H Y, Qiu F, et al. Cooling rate and microstructure of rapidly solidified Al-20wt.%Si alloy[J]. Materials Science & Engineering A, 2006, 417(1-2): 275-280.
[16]Chen R, Shi Y F, Xu Q Y, et al. Effect of cooling rate on solidification parameters and microstructure of Al-7Si-0.3Mg-0.15Fe alloy[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(6): 1645-1652.
[17]Najafabadi M A A, Ourdjini A, Elliott R. Impurity modification of aluminium-silicon eutectic alloys[J]. Journal of Materials Science, 1996, 31(14): 3731-3737.
[18]孟繁琴. 稀土和磷复合变质对过共晶铝-硅合金硅晶体形貌与力学性能的影响[J]. 稀土, 1998(2): 63-66.
Meng Fanqin. Influence of RE and P complex modification on the shape of silicon crystals and mechanical properties of hypereutectic Al-Si alloy[J]. Chinese Rare Earths, 1998(2): 63-66.
[19]Mousavi G S, Emamy M, Rassizadehghani J. The effect of mischmetal and heat treatment on the microstructure and tensile properties of A357 Al-Si casting alloy[J]. Materials Science & Engineering A, 2012, 556: 573-581.
[20]康福伟, 李如一, 乔昕, 等. 热处理工艺对ZL114A铝合金组织及力学性能的影响[J]. 哈尔滨理工大学学报, 2019, 24(1): 117-121.
Kang Fuwei, Li Ruyi, Qiao Xin, et al. Effects of heat treatment processing on the microstructure and mechanical properties of ZL114A aluminum alloy[J]. Journal of Harbin University of Science and Technology, 2019, 24(1): 117-121.
[21]黄彩敏, 杨琨, 石伟和. 热处理对A356铝合金组织与性能的影响[J]. 科技创业月刊, 2014(6): 205-206.
[22]李卫超, 邹勇志, 曾建民. 固溶温度和时间对ZL114A合金组织的影响[J]. 机械工程材料, 2008(11): 25-27.
Li Weichao, Zou Yongzhi, Zeng Jianmin. Influence of solution temperature and time on microstructure of ZL114A alloy[J]. Materials for Mechanical Engineering, 2008(11): 25-27.
[23]王艳丽, 王杰芳, 张建波. 共晶铝硅合金中硅相随固溶时间的变化[J]. 中国高新技术企业, 2010(19): 81-82.