细晶材料对水平连铸Al-18Si合金组织及其均匀性的影响

张静; 于化顺; 姜石峰; 闵光辉; 赵宰炯

doi:10.15980/j.tzzz.2013.11.016

试验研究 | 浏览量 : 0 下载量: 79 CSCD: 0

导出
分享
收藏
专辑

细晶材料对水平连铸Al-18Si合金组织及其均匀性的影响
Influence of Fine-Grained Master Alloy on the Microstructure and Uniformity of HCC（Horizontal Continuous-Casting）Al-18Si Alloy
2013年33卷第11期页码：985-988
纸质出版日期： 2013 ，
DOI： 10.15980/j.tzzz.2013.11.016

扫描看全文

[1]张静,于化顺,姜石峰,闵光辉,赵宰炯.细晶材料对水平连铸Al-18Si合金组织及其均匀性的影响[J].特种铸造及有色合金,2013,33(11):985-988.

Zhang Jing, Yu Huashun, Kang Suk Bong, et al. Influence of Fine-Grained Master Alloy on the Microstructure and Uniformity of HCC（Horizontal Continuous-Casting）Al-18Si Alloy[J]. Special Casting & Nonferrous Alloys, 2013,33(11):985-988.
[1]张静,于化顺,姜石峰,闵光辉,赵宰炯.细晶材料对水平连铸Al-18Si合金组织及其均匀性的影响[J].特种铸造及有色合金,2013,33(11):985-988. DOI： 10.15980/j.tzzz.2013.11.016.

Zhang Jing, Yu Huashun, Kang Suk Bong, et al. Influence of Fine-Grained Master Alloy on the Microstructure and Uniformity of HCC（Horizontal Continuous-Casting）Al-18Si Alloy[J]. Special Casting & Nonferrous Alloys, 2013,33(11):985-988. DOI： 10.15980/j.tzzz.2013.11.016.

摘要

从金属组织遗传性原理出发

使用同种成分的细晶合金作为中间合金来细化水平连铸Al-18Si合金的组织。利用扫描电镜（SEM）、差式扫描热分析（DSC）等研究了细晶中间合金含量对Al-18Si合金组织及其均匀性的影响。结果表明

细晶中间合金可以有效减小Al-18Si合金锭初生Si尺寸

提高其铸锭横截面上组织的均匀性。加入细晶中间合金后初生Si形核温度提高

释放的结晶潜热减少;中间合金的加入还可以明显改善合金凝固过程对冷却速度的敏感性

减少合金铸锭表面和中心凝固曲线上初生Si的析出温度差。

Abstract

Fine-grained structural materials（FSM for short）with the same composition of Al-18Si alloy were used as the master alloy to modify the microstructure of HCC Al-18Si alloys because of its structural heredity.The influences of FSM master alloy on the microstructure and uniformity of Al-18Si alloy were investigated by SEM（scanning electron microscopy）and DSC.The results show that FSM master alloy can reduce the size of primary Si and improve the uniformity of the billet along the cross-section.The addition of FSM master alloy can increase the nucleation temperature of primary Si and reduce the latent heat of crystallization.In addition

with the addition of the master alloy

the alloys is less sensitive to cooling rate by DSC analysis

which reveals that the differences of nucleation temperature at surface and center of the billet is decreased.