【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。更多还原

【Abstract】 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.更多还原