3Zr相質(zhì)點尺寸也減小,面積分數(shù)也降低。凝固后在α Al基體中的Sc、Cu和Zr的固溶量隨保溫時間延長和保溫溫度提高都增加。保溫一定時間后,部分溶解到溶體中的Sc原子被吸附到Al3Zr相表面,形成中間為Al3Zr相表面富Sc的結(jié)構(gòu)。Sc和Zr聯(lián)合加入后,合金凝固組織細小,隨著保溫溫度提高和保溫時間延長,合金凝固組織的晶粒尺寸略有增大。大量表面富Sc的Al3Zr質(zhì)點為合金凝固提供了大量的異質(zhì)形核核心,細化了合金組織。添加Cu-Sc中間合金的Al-Zr合金,均勻化退火后,同添加Al-Sc-Zr中間合金一樣,也析出大量“芯殼”結(jié)構(gòu)的Al3(Sc,Zr)相。"/>

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Cu-Sc中間合金在液態(tài)Al-Zr合金中的溶解
作者:
作者單位:

1.東北大學(xué) 材料電磁過程研究教育部重點實驗室;2.東北大學(xué) 冶金學(xué)院

作者簡介:

通訊作者:

中圖分類號:

TG146.21

基金項目:

國家自然科學(xué)基金(U1608252,U1708251,51574075);國家重點研發(fā)計劃(2016YFB0300901),中央高校基本科研專項資金(N180905010)


Dissolution of Cu-Sc Master Alloy in Liquid Al-Zr alloy
Author:
Affiliation:

1.Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University;2.School of Metallurgy,Northeastern University

Fund Project:

National Natural Science Foundation of China (U1608252, U1708251, 51574075); National Key Research and Development Program (2016YFB0300901), Fundamental Research Fund for Central Universities (N180905010)

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    摘要:

    本文研究了Cu-20wt%Sc中間合金在液態(tài)Al-0.12wt%Zr合金中的溶解行為。發(fā)現(xiàn)隨著保溫溫度提高和保溫時間延長,含Sc質(zhì)點的尺寸減小,面積分數(shù)降低,Al3Zr相質(zhì)點尺寸也減小,面積分數(shù)也降低。凝固后在α Al基體中的Sc、Cu和Zr的固溶量隨保溫時間延長和保溫溫度提高都增加。保溫一定時間后,部分溶解到溶體中的Sc原子被吸附到Al3Zr相表面,形成中間為Al3Zr相表面富Sc的結(jié)構(gòu)。Sc和Zr聯(lián)合加入后,合金凝固組織細小,隨著保溫溫度提高和保溫時間延長,合金凝固組織的晶粒尺寸略有增大。大量表面富Sc的Al3Zr質(zhì)點為合金凝固提供了大量的異質(zhì)形核核心,細化了合金組織。添加Cu-Sc中間合金的Al-Zr合金,均勻化退火后,同添加Al-Sc-Zr中間合金一樣,也析出大量“芯殼”結(jié)構(gòu)的Al3(Sc,Zr)相。

    Abstract:

    Dissolution behaviors of Cu-20%Sc master alloy in liquid Al-0.12%Zr alloy was studied in this paper. It was found that both size and areal fraction of particles bearing Sc and Al3Zr particles decreased,the solubility of Sc,Cu and Zr in α Al increased with increase in holding time and temperature. Part of Sc atoms was odsorbed on the surface of Al3Zr particles so that Al3Zr particles rich Sc on surface were formed. The microstructure of the alloy with Sc and Zr after solidification was fine observably. Average grain size of the alloy increased slightly with increase in holding time and temperature. Fine microstructure of the alloy with Zr and Sc is resulted from the a lot of stable nuclei of Al3(Zr,Sc) particles rich Sc on surface. Same as adding Al-Sc-Zr master alloy Al3(Sc,Zr) precipitated in the Al-Zr alloy added by Cu-Sc master alloy after homogenization.

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崔建忠,王釗,王春新,王復(fù)越,王向杰. Cu-Sc中間合金在液態(tài)Al-Zr合金中的溶解[J].稀有金屬材料與工程,2022,51(5):1724~1734.[Cui Jianzhong, Wang Zhao, Wang Chunxin, Wang Fuyue, Wang Xiangjie. Dissolution of Cu-Sc Master Alloy in Liquid Al-Zr alloy[J]. Rare Metal Materials and Engineering,2022,51(5):1724~1734.]
DOI：10.12442/j. issn.1002-185X.20210374

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  • 收稿日期:2021-04-27
  • 最后修改日期:2021-05-18
  • 錄用日期:2021-06-22
  • 在線發(fā)布日期: 2022-06-09
  • 出版日期: 2022-05-30