4Sr相的形貌發(fā)生明顯的變化,隨著RE含量上升,Al4Sr的形貌由針狀向塊狀轉(zhuǎn)變,當(dāng)RE添加量達(dá)到4%時(shí),Al4Sr相完全成為塊狀；3)發(fā)現(xiàn)當(dāng)新型Al-10Sr-4RE用于Al-20Si變質(zhì)處理時(shí),能明顯細(xì)化初晶硅的晶粒尺寸,使得初晶硅的分布趨于均勻,晶粒的尺寸范圍為13.81-37.61μm,平均晶粒尺寸為24.58μm；4)加入RE之后Al4Sr相的分布趨于彌散,細(xì)化Al-20Si的效果更加顯著。"/>

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RE對(duì)Al-10Sr中間合金組織的影響及在Al-Si合金中的應(yīng)用
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武漢大學(xué)動(dòng)力與機(jī)械學(xué)院,湖南金聯(lián)星特種材料股份有限公司,湖南金聯(lián)星特種材料股份有限公司,湖南金聯(lián)星特種材料股份有限公司,武漢大學(xué)動(dòng)力與機(jī)械學(xué)院,武漢大學(xué)物理科學(xué)與技術(shù)學(xué)院

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TG27

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國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)前沿技術(shù)研究類項(xiàng)目資助(項(xiàng)目號(hào)SS2015AA031102)


Effect of RE on microstructures of Al-10Sr master alloy and the application in Al-20Si alloy casting
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School of Power and Mechanical Engineer,Wuhan University,,,,,

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    摘要:

    本文研究了不同稀土元素(RE)添加量對(duì)Al-10Sr中間合金組織的影響以及新型Al-10Sr-RE中間合金在Al-Si中的應(yīng)用。實(shí)驗(yàn)結(jié)果表明：1)普通Al-10Sr中間合金的組織主要由α-Al基體、Al4Sr相組成；2)添加RE之后,Al-10Sr中間合金中Al4Sr相的形貌發(fā)生明顯的變化,隨著RE含量上升,Al4Sr的形貌由針狀向塊狀轉(zhuǎn)變,當(dāng)RE添加量達(dá)到4%時(shí),Al4Sr相完全成為塊狀；3)發(fā)現(xiàn)當(dāng)新型Al-10Sr-4RE用于Al-20Si變質(zhì)處理時(shí),能明顯細(xì)化初晶硅的晶粒尺寸,使得初晶硅的分布趨于均勻,晶粒的尺寸范圍為13.81-37.61μm,平均晶粒尺寸為24.58μm；4)加入RE之后Al4Sr相的分布趨于彌散,細(xì)化Al-20Si的效果更加顯著。

    Abstract:

    In this paper,the effect of RE elements on microstructure of Al-10Sr master alloy and the application in Al-20Si alloy casting was investigated. The experimental results revealed that: 1) the microstructure of Al-10Sr master alloy mainly containedα(Al) matrix and Al4Sr phase; 2) The morphology of the Al4Sr phase on Al-10Sr master alloy changed from acicular shape to small blocks with the addition of RE to 4.0wt %; 3) The grain size of primary silicon on Al-20Si alloy was refined into a range of 13.81-37.61μm, and the average grain size was 24.58μm with a homogeneous distribution during modification by using the Al-10Sr-4RE master alloy; 4) It was found that after adding RE, the Al4Sr phase distribution became more homogeneous, and it exhibited better modification effect on Al-20Si alloy.

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邱智華,李云龍,陳歡,陳建春,張國棟,潘春旭. RE對(duì)Al-10Sr中間合金組織的影響及在Al-Si合金中的應(yīng)用[J].稀有金屬材料與工程,2017,46(5):1310~1314.[Qiu Zhihua, Li Yunlong, Chen Huan, Chen Jianchun, Zhang Guodong, Pan Chunxu. Effect of RE on microstructures of Al-10Sr master alloy and the application in Al-20Si alloy casting[J]. Rare Metal Materials and Engineering,2017,46(5):1310~1314.]
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  • 收稿日期:2015-01-15
  • 最后修改日期:2016-03-21
  • 錄用日期:2016-03-29
  • 在線發(fā)布日期: 2017-09-27
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