The invention provides a heat-treatment-free low-pressure casting aluminum alloy, a preparation method and application. Relates to the technical field of low-pressure casting. The heat-treatment-free low-pressure casting aluminum alloy comprises the following components in percentage by weight: 4.0 to 10.5 percent of Si, 0 to 1.0 percent of Fe, 0.1 to 0.8 percent of Mn, 0 to 0.6 percent of Mg, 0.022 to 0.22 percent of La, 0.033 to 0.33 percent of V, 0.033 to 0.33 percent of B and the balance of Al, the mass ratio of La to V to B is 2: 3: 3. The elements La, V and B can prevent the high-silicon aluminum alloy from generating'silicon poisoning ', the nucleation efficacy of LaB6 and (V, Al) B2 particles cannot be affected by the solute Si element, the LaB6 and (V, Al) B2 particles can be directly used as heterogeneous nucleation points of alpha-Al, the degree of supercooling needed by nucleation is reduced, the solidification efficiency of the alloy is improved, grain refinement is promoted, and the mechanical property of the alloy is improved.
本发明提供了一种免热处理低压铸造铝合金、制备方法及应用。涉及低压铸造技术领域。免热处理低压铸造铝合金组分按重量百分比计包括:Si:4.0~10.5%,Fe:0~1.0%,Mn:0.1~0.8%,Mg:0~0.6%,La:0.022~0.22%,V:0.033~0.33%,B:0.033~0.33%,余量为Al;La、V和B的质量比为2:3:3。La、V和B元素可以避免高硅铝合金产生“硅中毒”,LaB6和(V,Al)B2颗粒的成核效力不会受到溶质Si元素影响,可直接作为α‑Al的异质形核点,降低了成核所需的过冷度,提高了合金的凝固效率,还促进了晶粒的细化,提高了合金的力学性能。
Heat-treatment-free low-pressure casting aluminum alloy, preparation method and application
一种免热处理低压铸造铝合金、制备方法及应用
2024-11-26
Patent
Electronic Resource
Chinese
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