Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第14卷    第7期    总第64期    2004年7月

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文章编号:1004-0609(2004)07-1117-06
稀土熔剂对Al-10%Pb合金组织和性能的影响
倪红军1, 2, 黄明宇1, 朱  昱1

( 1. 南通工学院 机械工程系, 南通 226007; 
2. 上海交通大学 材料科学与工程学院, 上海 200030
)

摘 要: 采用一种含有玻璃成分的稀土熔剂,在1080℃高温条件下,对Al-10%Pb合金熔体进行覆盖、保护和净化。 结果表明: 同无熔剂相比, 加入量为1.0%和0.5%时, 合金的抗拉强度分别提高12.8%和12.0%, 延伸率分别提高42.8%和6.5%; 当流道厚度为1.0mm时,合金的流动性分别提高27.3%和1.4%。 同1.5%的熔剂加入量相比, 采用1.0%的稀土熔剂处理后的Al-Pb合金组织中铅粒圆整, 平均直径仅为20μm左右, 分布比较均匀。 分析了该种熔剂的作用机理。 

 

关键词: 稀土熔剂; Al-10%Pb合金;变质; 化学净化

Effects of rare earth flux on microstructure and 
properties of Al-10%Pb alloy melt 
NI Hong-jun1, 2, HUANG Ming-yu1, ZHU Yu1

1. Department of Mechanical Engineering,
Nantong Institute of Technology, 
Nantong 226007, China;
2. College of Materials Science and Engineering,
Shanghai Jiaotong University, Shanghai 200030, China

Abstract: Al-10%Pb alloy melt was covered, protected and purified with rare earth flux contained a glass composition at 1080℃. The experimental results indicate that the tensile strength of the alloy covered with 1.0% and 0.5% rare earth flux increases by 42.8% and 6.5% respectively, while the fluidity increases by 27.3% and 1.4% respectively when the thickness of runner way is 1.0mm comparing with that covered with no flux. The Pb phases in the microstructure of Al-10%Pb alloy are dispersion and roundness with 1.0% rare earth flux . Then the average size is about 20μm. The mechanism of rare earth flux improving the properties and microstructure was also discussed.

 

Key words: rare earth flux; Al-10%Pb alloy; modification; chemical purifying

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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