晶粒细化对铸造Al-3.2Si-0.8Mg合金流动性、力学性能和导热系数的影响
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- 英文论文题名：Effects of Gain Refinement on Fluidity,Mechanical Properties and Thermal Conductivity of As-cast Al-3.2Si-0.8Mg Alloy
- 论文作者：毛文龙 ; 赵禹凯 ; 王顺成 ; 郑开宏
- 英文论文作者：MAO Wenlong ; ZHAO Yukai ; WANG Shuncheng ; ZHENG Kaihong ; Guangdong Research Institute of Materials and Processing
- 年：2016
- 作者机构：广东省材料与加工研究所;
- 论文关键词：Ai-Si-Mg合金 ; 晶粒细化 ; 铸造流动性 ; 导热系数
- 英文论文关键词：Al-Si-Mg alloy ; grain refinement ; casting fluidity ; thermal conductivity
- 会议召开时间：2016-11-18
- 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
- 语种：中文
- 分类号：TG292
- 学会代码：CLDB
- 会议名称：第一届先进材料前沿学术会议
- 会议地点：中国陕西西安
- 主办单位：《材料导报》杂志社
- 学会名称：材料导报编辑部
- 页数：5
- 文件大小：982k
- 原文格式：O
- 会议级别：全国
摘要
采用金相显微镜、激光导热仪、拉伸试验机和扫描电镜研究了晶粒细化对Al-3.2Si-0.8Mg合金铸造流动性、导热系数与力学性能的影响。结果表明:随着α-Al晶粒的细化,Al-3.2Si-0.8Mg合金的铸造流动性、抗拉强度和伸长率逐渐提高,但导热系数略有下降。当Al-3.2Si-0.8Mg合金的晶粒细化至平均直径为90.9μm时,铸造流动性试样长度为867 mm,抗拉强度和伸长率分别为234 MPa和10.1%,导热系数为182.7 W/(m·K)。与未细化处理相比,此时Al-3.2Si-0.8Mg合金的铸造流动性提高了10.9%,抗拉强度和伸长率分别提高了5.9%和9.8%,导热系数下降了2.9%。
The effects of gain refinement on casting fluidity,thermal conductivity and mechanical properties of as-cast Al-3.2Si-0.8Mg alloy was researched by metallurgical microscope,flash thermal conductivity meter,tensile testing machine and scanning electron microscope.The results indicated that with the refinement of orAl grains,the casting fluidity,tensile strength and elongation were improved,thermal conductivity was descended.When the average grain diameter of as-cast Al-3.2Si-0.8Mg alloy is90.9 μm,the length of casting fluidity sample is 867 mm,the tensile strength and elongation are 234 MPa and 10.1%respectively,and the thermal conductivity is 182.7 W/(m · K).Compared with that of Al-3.2Si-0.8Mg alloy without grain refinement,the casting fluidity is increased by 10.9%,tensile strength and elongation is improved by 5.9%and 9.8%respectively,but the thermal conductivity is decreased by 2.9%.
The effects of gain refinement on casting fluidity,thermal conductivity and mechanical properties of as-cast Al-3.2Si-0.8Mg alloy was researched by metallurgical microscope,flash thermal conductivity meter,tensile testing machine and scanning electron microscope.The results indicated that with the refinement of orAl grains,the casting fluidity,tensile strength and elongation were improved,thermal conductivity was descended.When the average grain diameter of as-cast Al-3.2Si-0.8Mg alloy is90.9 μm,the length of casting fluidity sample is 867 mm,the tensile strength and elongation are 234 MPa and 10.1%respectively,and the thermal conductivity is 182.7 W/(m · K).Compared with that of Al-3.2Si-0.8Mg alloy without grain refinement,the casting fluidity is increased by 10.9%,tensile strength and elongation is improved by 5.9%and 9.8%respectively,but the thermal conductivity is decreased by 2.9%.
引文
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2 Luo Song,Lin Gaoyong,et al.Effect of hard phases on surface quality of 6061 special-shaped radiator aluminum profile[J].Chin J Nonferrous Met,2015,21(7):1521(in Chinese).罗淞,林高用,等.硬质相对6061铝合金异型散热型材表面质量的影响[J].中国有色金属学报,2015,21(7):1521.
3 Sui Yudong,Wang Qudong.Development of heat-resistant cast aluminum alloy for engine applications[J].Mater Rev:Rev,2015,29(2):14(in Chinese).隋育栋,王渠东.铸造耐热铝合金在发动机上的应用研究与发展[J].材料导报:综述篇,2015,29(2):14.
4 Ikeshita S,Strodahs A,Saghi Z,et al.Hardness and microstructural variation of Al-Mg-Mn-Sc-Zr alloy[J].Micron,2016,82:1.
5 Luo Guojun,Yuan Ziliang.Warm extrusion technology for 6061aluminum-alloy[J].Hot Working Technol,2012,41(1):178(in Chinese).罗国军,袁子良.6061铝合金温挤压工艺[J].热加工工艺,2012,41(1):178.
6 Li Ping,Wang Zhutang.Die casting and aluminum alloys for automobile[J].Light Alloy Fabrication Technol,2011,39(12):Kin Chinese).李平,王祝堂.汽车压铸及铸造铝合金[J].轻合金加工技术,2011,39(12):1.
7 Zhang Peng,Li Zhenming,Liu Baoliang,et al.Improved tensile properties of a new aluminum alloy for high pressure die casting[J].Mater Sci Eng A,2016,651:376.
8 Zhong Zilong,Zuo Xiaoqing,Dong Xiaorong,et al.Progress in semi-solid forming technology for high strength aluminum alloy[J].Mater Rev:Rev,2013,27(10):122(in Chinese).钟子龙,左孝青,董晓蓉,等.高强铝合金半固态成形技术研究进展[J].材料导报:综述篇,2013,27(10):122.
9 Cho Y H,Kim H W,Kim W,et al.The effect of Ni additions on the microstructure and cast ability of low Si added Al casting alloys[J].Mater Today:Proceedings,2015,2(10):4924.
10 Qi Pixiang.Squeeze casting of wrought aluminum alloy[J].Special Casting Nonferrous Alloys,2008,28(10):769(in Chinese).齐丕骧.变形铝合金挤压铸造[J].特种铸造及有色合金,2008,28(10):769.
11 Peng Yong,Wang Shuncheng,Zheng Kaihong,et al.Microstructure and mechanical properties of 6061 aluminum alloy prepared by casting-forging integrated technology[J].Chin J Nonferrous Met,2014,24(2):325(in Chinese).彭勇,王顺成,郑开宏,等.铸锻复合一体化成形6061铝合金的组织和力学性能[J].中国有色金属学报,2014,24(2):325.
12 Niu Yanping,Zhao Yukai,Zheng Kaihong.Effects of Si content on casting fluidity,thermal conductivity and mechanical properties of Al-Mg-Si alloy[J].Foundry,2016,65(4):366(in Chinese).牛艳萍,赵禹凯,王顺成,等.Si含量对Al-Si-Mg合金铸造流动性、热导率和力学性能的影响[J].铸造,2016,65(4):366.
13 Xiang Zhilei,Ma Tengfei,Chen Ziyong,et al.Grain refinement of casting aluminum alloy[J].Mater Rev:Rev,2013,27(3):110(in Chinese).相志磊,马腾飞,陈子勇,等.铸造铝合金的细化机理[J].材料导报:综述篇,2013,27(3):110.
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15 Ravi K R,Pillai R M,Amaranathan K R,et al.Fluidity of aluminum alloys and composites:A review[J].J Alloys Compd,2008,456(1):201.
16 Zhu Biwu,Li Luoxing,Liu Xiao,et al.Flow characteristics and solidified microstructure during filling process of thin-wall aluminum alloy under high pressure die casting conditions[J].Chin J Nonferrous Met,2014,24(1):43(in Chinese).朱必武,李落星,等.薄壁铝合金压铸充型过程中的流动特征及其凝固组织[J].中国有色金属学报,2014,24(1):43.
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18 Choi S W,Kim Y M,Lee K M,et al.The effects of cooling rate and heat treatment on mechanical and thermal characteristics of Al-Si-CuMg foundry alloys[J].J Alloys Compd,2014,617:654.
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20 Wang Chunming,Chen Yungui,Xiao Suien,et al.Thermal conductivity and mechanical properties oi as-cast Mg-3Zn-(0.5~3.5)Sn alloys[J].Rare Metal Mater Eng,2013,42(10):2019.
21 Shin J S,Ko S H,Kim K T.Development and characterization oi low-silicon cast aluminum alloys ior thermal dissipation[J].J Alloys Compd,2016,660:141.
22 Zhao Jun,Li Jimeng,Zhao Lumin,et al.Thermal conductivity and electrical conductivity of Cu-37.67Zn-1.43A1 alloy with high pressure heat treatment[J].Chin J Rare Met,2015,39(2):97(in Chinese).赵军,李冀蒙,赵陆民,等.高压热处理对Cu-37.67 Zn-1.43 Al合金导热及导电性能的影响[J].稀有金属,2015,39(2):97.
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