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冷卻速率對Sn-3.5Ag合金微觀組織及力學(xué)性能的影響
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云南省重點基金 (2011FA026)；云南省創(chuàng)新團(tuán)隊 (2012HC027)；云南省科技合作專項 (2012IB002)


Effects of Cooling Rate on Microstructure and Mechanical Behavior of Sn-3.5Ag Alloy
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    研究了不同冷卻速率對Sn-3.5Ag合金的微觀組織、維氏硬度和力學(xué)性能的影響。通過采用空冷、水冷和急冷的方式獲得了冷卻速率分別為101、103和106 K/s的Sn-3.5Ag合金樣品，對樣品進(jìn)行顯微分析和力學(xué)性能測試后得出冷卻速率對β-Sn二次枝晶臂間距和Ag3Sn相的分布有顯著影響。隨冷卻速率的加快，β-Sn晶粒尺寸和二次枝晶臂間距逐漸減小，Ag3Sn晶粒尺寸也逐漸變小、分布更加均勻，樣品硬度、力學(xué)性能也隨冷卻速率的增加而提高。研究結(jié)果表明，合金微觀組織結(jié)構(gòu)和Ag3Sn相的分布規(guī)律對合金力學(xué)性能有顯著的影響，Ag3Sn相在合金中起了彌散強化的作用

    Abstract:

    The microstructure, micro-hardness and tensile behavior of bulk Sn-3.5Ag alloy were studied as a function of cooling rate. Sn-3.5Ag alloy samples with the controlled cooling rates of 101, 103 and 106 K/S of were obtained by cooling specimens in different media: air, water and rush cold. The microscopic analysis and mechanical properties test were conducted. Results show that the cooling rat has a significant effect on the secondary dendrite size and distribution of β-Sn phase. The β-Sn grain average size and the secondary dendrite arm space are gradually reduced with the increase of cooling rate, Ag3Sn grain also become smaller, and distribute more uniformly. Besides, the micro-hardness and tensile properties with increasing cooling rate improve. Finally, it is concluded that the microstructure and the distribution of Ag3Sn grains influence obviously the mechanical properties, and Ag3Sn grains play a dispersion strengthened role in the alloy

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溥存繼,謝 明,杜文佳,張吉明,楊云峰,王塞北,張利廣.冷卻速率對Sn-3.5Ag合金微觀組織及力學(xué)性能的影響[J].稀有金屬材料與工程,2015,44(4):1012~1016.[Pu Cunji, Xie Ming, Du Wenjia, Zhang Jiming, Yang Yunfeng, Wang Saibei, Zhang Liguang. Effects of Cooling Rate on Microstructure and Mechanical Behavior of Sn-3.5Ag Alloy[J]. Rare Metal Materials and Engineering,2015,44(4):1012~1016.]
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  • 收稿日期:2014-04-19
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  • 在線發(fā)布日期: 2015-06-08
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