变质工艺对过共晶Al-Si合金连铸坯组织的影响

张训; 张志峰; 李大全; 徐骏

轻有色合金 | 浏览量 : 0 下载量: 113 CSCD: 1

导出
分享
收藏
专辑

变质工艺对过共晶Al-Si合金连铸坯组织的影响
Effects of Modification Treatment on Microstructure of Continuous Casting Hypereutectic Al-16.3Si-4.5Cu-0.55Mg Alloy Billets
2011年31卷第2期页码：183-186
纸质出版日期： 2011 ，
DOI：

扫描看全文

[1]张训,张志峰,李大全,徐骏.变质工艺对过共晶Al-Si合金连铸坯组织的影响[J].特种铸造及有色合金,2011,31(02):183-186+205-206.

Zhang Xun, Zhang Zhifeng, Li Daquan, et al. Effects of Modification Treatment on Microstructure of Continuous Casting Hypereutectic Al-16.3Si-4.5Cu-0.55Mg Alloy Billets[J]. Special Casting & Nonferrous Alloys, 2011,31(2):183-186.
[1]张训,张志峰,李大全,徐骏.变质工艺对过共晶Al-Si合金连铸坯组织的影响[J].特种铸造及有色合金,2011,31(02):183-186+205-206. DOI：

Zhang Xun, Zhang Zhifeng, Li Daquan, et al. Effects of Modification Treatment on Microstructure of Continuous Casting Hypereutectic Al-16.3Si-4.5Cu-0.55Mg Alloy Billets[J]. Special Casting & Nonferrous Alloys, 2011,31(2):183-186. DOI：

摘要

采用美国标准TP-1模具及模拟方法

研究了Al-Si-P变质剂的加入量、熔体浇注温度以及变质保温时间对过共晶Al-Si合金连铸坯料凝固组织的影响规律。结果表明

Al-Si-P变质剂加入量（超过0.02%）和变质保温时间对合金显微组织细化的影响不明显;而浇注温度对初生Si的大小分布影响较大

浇注温度越高

初生Si越细小、分布也越均匀。在合适的工艺匹配条件下

可以获得初生Si细小、形貌较为规则圆整、分布均匀的显微组织。

Abstract

Effects of modification treatment

such as Al-Si-P addition

pouring temperature and holding time

on microstructure of continuous casting hypereutectic Al-Si-Cu-Mg alloy were investigated by means of US standard TP-1 mold and analogue method.The results show that effects of Al-Si-P modifier addition（more than 0.05%）and holding time on refinement of microstructure of the alloy can be ignored

however

pouring temperature has the obvious effects on distribution of primary Si phase in the microstructure.With increasing in pouring temperature

grain size of primary Si phase is refined with more and more uniform distribution.Fine primary Si phase with spherical shape and uniform distribution can be observed in the microstructure of the Al-Si alloy with a optimized processing parameters.