Sn含量对Al-10Si-1.5Mg-x Sn合金阻尼和力学性能的影响  

Effects of Sn Content on Damping and Mechanical Properties of Al-10Si-1.5Mg-x Sn Alloy

作　　者：王嘉盛 许吉 张志豪[2] 赵梓尧 Wang Jiasheng;Xu Ji;Zhang Zhihao;Zhao Ziyao(Gansu Dongxing Aluminum Co.,Ltd.,Lanzhou 735100;Key Laboratory for Advanced Materials Processing of Ministry of Education,University of Science and Technology Beijing,Beijing 100083)

机构地区：[1]甘肃东兴铝业有限公司,兰州735100 [2]北京科技大学材料先进制备技术教育部重点实验室,北京100083

出　　处：《特种铸造及有色合金》2024年第3期408-414,共7页Special Casting & Nonferrous Alloys

基　　金：中央高校基本科研业务费资助项目(FRF-TP-20-030A1)。

摘　　要：研究了Al-10Si-1.5Mg-x Sn(x=0~6.0)合金的力学性能、阻尼性能和组织特征,分析了阻尼性能和力学性能随Sn含量变化的规律。结果表明,Sn加入使合金中的α-Al基体组织细化,并且Sn与Mg产生Mg_(2)Sn相,导致Mg_(2)Si相的数量减少;Sn含量增加到4.0%时,α-Al仍保持细小特征,β-Sn以及Mg_(2)Sn数量较多且呈弥散均匀分布;Sn含量进一步增加至6.0%时,α-Al、β-Sn和Mg_(2)Sn明显粗化。随着Sn含量从0升高至6.0%,合金的抗拉强度从206 MPa逐渐减小至169 MPa,伸长率基本保持在2.0%。合金的阻尼性能随着Sn含量的增加先提升后降低,Sn含量为4.0%时,阻尼性能较高,25℃/1 Hz、200℃/1 Hz和25℃/40 Hz条件下阻尼损耗因子tanh分别达到0.038、0.058和0.069。The mechanical properties,damping properties,and microstructure characteristics of Al-10Si-1.5Mg-x Sn(x=0~6.0%)alloy was investigated,and the variation law of damping and mechanical properties with different Sn content were analyzed.The results indicate that microstructure of theα-Al phase in the alloy is refined with Sn addition,which reacts with Mg to generate Mg_(2)Sn phase,resulting in the reduction of Mg_(2)Si phases.With Sn content of 4.0%,α-Al remains the fined feature,whileβ-Sn and Mg_(2)Sn are abundant and uniformly distributed.When Sn content further increasing to 6.0%,α-Al、β-Sn and Mg_(2)Sn are coarsened obviously.With Sn content increasing from 0 to 6.0%,the tensile strength of alloy is gradually decreased from 206 MPa to 169 MPa,and the elongation maintains 2.0%.With the increase of Sn content,the damping properties of alloy are increased firstly and then decreased,reaching a peak at 4.0%Sn.The damping loss factor tanh at 25℃/1 Hz,200℃/1 Hz and 25℃/40 Hz is 0.038,0.058 and 0.069,respectively.

关 键 词：铸造铝合金 Sn微合金化 阻尼性能 力学性能 

分 类 号：TG27[金属学及工艺—铸造]