Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第8期    总第245期    2019年8月

[PDF全文下载]    [Flash在线阅读]    [HTML全文阅读]

    

文章编号:1004-0609(2019)-08-1599-07
Al-3B变质共晶铝硅合金的显微组织与力学性能
李宏宝1, 2,涂 浩1, 2,彭浩平1, 2,吴长军1, 2,王建华1, 2,苏旭平1, 2

(1. 常州大学 材料科学与工程学院,江苏省表面科学与技术重点实验室,常州 213164;
2. 常州大学 江苏省光伏科学与工程协同创新中心,常州 213164
)

摘 要: 采用Al-3B中间合金对不同温度Al-12.6Si合金熔体进行变质处理。结果表明:当变质温度相同时,随着Al-3B加入量的增加,Al-12.6Si合金中α(Al)相的面积分数呈现先增大后减小的变化趋势,当Al-3B加入量为0.4%(质量分数)时,α(Al)相面积分数达到最大值35.6%。当Al-3B加入量为0.4%时,随着变质温度的升高,Al-12.6Si合金中α(Al)相的面积分数也呈现先增大后减小的变化趋势,当变质温度为700 ℃时,合金组织中α(Al)相的面积分数最大。与未变质Al-12.6Si合金相比,在700 ℃时经0.4%Al-3B变质处理后,Al-12.6Si合金的抗拉伸强度和伸长率分别提高12%和64%,变质处理后合金的综合力学性能得到明显提高。

 

关键字: Al-12.6Si合金;变质处理;显微组织;力学性能

Microstructure and mechanical properties of eutectic Al-Si alloy modified with Al-3B
LI Hong-bao1, 2, TU Hao1, 2, PENG Hao-ping1, 2, WU Chang-jun1, 2, WANG Jian-hua1, 2, SU Xu-ping1, 2

1. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164 , China;
2. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China

Abstract:The Al-3B master alloy was used to modify the melt of Al-12.6Si alloy at different temperatures. The results show that when the modification temperature is the same, the area fraction of α(Al) phase in Al-12.6Si alloy increases first and then decreases with the increase of the addition amount of Al-3B, and it reaches the maximum value of 35.6% when the added amount of Al-3B is 0.4% (mass fraction). When the addition amount of Al-3B is 0.4%, the area fraction of α(Al) phase in Al-12.6Si alloy increases first and then decreases with the increase of modification temperature. When the modification temperature is 700 ℃, the area fraction of the α(Al) phase in the alloy reaches the maximum. Compared with the unmodified Al-12.6Si alloy, the tensile strength and elongation of the Al-12.6Si alloy modified by 0.4% Al-3B at 700 ℃ increases by 12% and 64%, respectively. The comprehensive mechanical properties of alloy are obviously improved after modification.

 

Key words: Al-12.6Si alloy; modification; microstructure; mechanical property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f-ysxb@mail.csu.edu.cn