(湖南大学 材料科学与工程学院， 长沙 410082)
摘 要: 研究了耐热铝合金Al-8.7Fe-1.6V-1.3Si(8009)的固液混合铸造。结果表明：采用固液混合铸造工艺制备的耐热铝合金显微组织明显细化，室温和高温力学性能明显优于铸造和搅拌铸造耐热铝合金。固液混合铸造坯具有良好的挤压性能，挤压坯具有优异的室温和高温耐磨性能。在本工艺条件下，当粉末添加质量和合金熔体质量比为1时，耐热铝合金中的Al13Fe4析出相粒径可控制在30μm以下，材料的室温力学性能为：σb=210MPa，00.2=190MPa，δ=4％；在473K时为：σb=150MPa，σ0.2=130MPa，δ=5%；在573K时为：σb=110MPa，σ0.2=90MPa，δ=6%。
关键字: 固液混合铸造；耐热铝合金；半固态加工
processing of Al-8.7Fe-1.6V-1.3Si
elevated temperature alloy
（College of Materials Science and Engineering，
Hunan University，Changsha 410082，China）
Abstract:A novel mixed solid-liquid casting technology was utilized to prepare elevated temperature aluminum alloy (8009). The results show that, comparing with conventional casting processing and stirring casting process，this process can effectively refine the grains and precipitated Al13Fe4 phase particles and can obviously improve the room temperature or high temperature mechanical properties. Better extrudability，abrasive resistance at room temperature and high temperature can also be obtained by this process. When mass ratio of the alloy powder to the melt is up to 1，the mean size of the Al13Fe4 particles in the alloy samples can be controlled under 30μm; its mechanical properties at room temperature is σb=210MPa，σ0.2=190MPa，δ=4%; at 473K，σb=150 MPa，σ0.2=130MPa，δ=5%；at 573K，σb=110MPa，σ0.2=90MPa，δ=6%.
Key words: mixed solid-liquid casting; elevated temperature aluminum alloy; semi-solid processing
