稀土熔剂对Al-10%Pb合金组织和性能的影响  

Effects of rare earth flux on microstructure and properties of Al-10%Pb alloy melt

作　　者：倪红军[1] 黄明宇[1] 朱昱[1] 

机构地区：[1]南通工学院机械工程系

出　　处：《中国有色金属学报》2004年第7期1117-1122,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展规划资助项目(G1999064900);江苏省教委自然科学基金资助项目(D2KJD430002);南通工学院自然科学基金资助项目 (2 0 0 2 1 0 )

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。Al-10%Pb alloy melt was covered, protected and purified with rare earth flux contained a glass composition at 1 080 ℃. 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 1.0 mm 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 20 μm. The mechanism of rare earth flux improving the properties and microstructure was also discussed.

关 键 词：稀土熔剂 Al-10%Pb合金 变质 化学净化 

分 类 号：TG146.2[一般工业技术—材料科学与工程]