摘要
采用普通金属型重力铸造法制备了Mg-2.19%Si和Al-17.8%Si中间合金以及Mg-15%Al-5%Si-0.5%Sb自生复合材料。研究表明,采用粒径为4 mm的结晶硅,通过气体保护、添加覆盖剂等保护措施,在810℃下保温5 h可制得Mg-2.19%Si中间合金,Al-Si中间合金可采用低温加硅法制备。Mg-15%Al-5%Si-0.5%Sb自生复合材料中的Sb对Mg2Si相有一定的细化作用,并使树枝状的Mg2Si转变为粒状,但细化尺寸有限,应采取其它方式进一步细化。
The master alloys Mg-2.19%Si and Al-17.8%Si and the in-situ composite Mg-15%Al-5% Si-0.5%Sb were prepared by the permanent mould gravity casting. The experimental results show that Mg-2.19%Si master alloy can fabricated by using 4 mm diameter silicon at 810 ℃, hold for 5hrs under the protection of gas and covering flux. Al-17.8% Si master alloy could be made by the hypothermia silicon adding method. The Sb in the in-situ composite Mg- 15 % Al-5 % Si-0.5 % Sb could refine the Mg2Si phase and changedendritic Mg2Si into granular shape, but its refining effect is limited and other measures should be taken to refine structure further.
出处
《铸造技术》
EI
CAS
北大核心
2006年第4期357-359,共3页
Foundry Technology
基金
陕西省自然科学研究计划项目(2003E111)
凝固技术国家重点实验室开放课题资助项目(200401)
西安理工大学科技创新计划项目
关键词
铝硅合金
镁硅合金
镁铝硅合金
锑
变质处理
Al-Si master alloy
Mg-Si master alloy
Mg-Al-Si alloy
Sb
Modification
