Compound Modification of Aluminum Alloy Melt under High Temperature with Sr and RE

Li Qian  Luo Jirong  Song Xiangjun

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Compound Modification of Aluminum Alloy Melt under High Temperature with Sr and RE
Issue 5, Pages: 16-17(2001)
Published： 2001 ，
DOI：

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[1]李千,,,,,,,,,,罗吉荣,,,,,,,,,,宋象军,,,,,,,,,,张梅.高温铝液的Sr-RE复合变质研究[J].特种铸造及有色合金,2001(05):16-17+2.

Li Qian Luo Jirong Song Xiangjun. Compound Modification of Aluminum Alloy Melt under High Temperature with Sr and RE. [J]. Special Casting & Nonferrous Alloys (5):16-17(2001)
[1]李千,,,,,,,,,,罗吉荣,,,,,,,,,,宋象军,,,,,,,,,,张梅.高温铝液的Sr-RE复合变质研究[J].特种铸造及有色合金,2001(05):16-17+2. DOI：

Li Qian Luo Jirong Song Xiangjun. Compound Modification of Aluminum Alloy Melt under High Temperature with Sr and RE. [J]. Special Casting & Nonferrous Alloys (5):16-17(2001) DOI：

摘要

由于铝合金消失模铸造的特点

铝液浇注温度较高。浇注温度达 76 0℃时

Sr变质后铸件针孔倾向大

铝液保温时间小于 2 0min ;加RE变质后铸件针孔倾向小

保温时间延长为 35～ 40min

但用量偏大 ;Sr+RE复合处理铝液具有变质效果好

铸件针孔倾向小

助剂用量小的优点

是一种实用的铝液处理方法

Abstract

It is necessary to be much higher pouring temperature for aluminum alloy in lost foam casting than in empty cavity process. Under the pouring temperature at 760 ℃

the pin hole tendency in casting with single Sr modification is higher in the period of holding time less than 20 min while the pin hole tendency in castings with single RE modification by larger addition is low in the period of holding time up to 35～40 min. Compound modification of aluminum melt with both Sr and RE has the advantages of good modified effect

e.g. low casting pin hole tendency and small modifier addition.