The invention provides a high-strength and high-toughness cast aluminum alloy and a preparation method and application thereof.The high-strength and high-toughness cast aluminum alloy is prepared from, by mass, 6.0%-10.0% of Si, 0-0.20% of Fe, 0-0.20% of Cu, 0-0.20% of Mn, 0.30%-0.75% of Mg, 0.10%-0.42% of Cr, 0.10%-0.40% of Ti, 0.01%-0.05% of Sr, 0-0.20% of Zn, 0.10%-0.40% of La, 0.05%-0.35% of Sm and the balance Al and inevitable impurity elements, and the total mass of La and Sm is 0.15%-0.6%. According to the high-strength and high-toughness cast aluminum alloy, by controlling the proportion range of all the elements, the microstructure of the alloy is regulated and controlled so as to improve the mechanical property, meanwhile, the casting fluidity of the alloy is improved, and therefore the high-strength and high-toughness cast aluminum alloy with the high strength and plasticity is obtained.
本申请提供了一种高强韧铸造铝合金及其制备方法和应用,高强韧铸造铝合金按照质量百分含量计,包括:Si 6.0%~10.0%、Fe 0~0.20%、Cu 0~0.20%、Mn 0~0.20%、Mg 0.30%~0.75%、Cr 0.10%~0.42%、Ti 0.10%~0.40%、Sr 0.01%~0.05%、Zn 0~0.20%、La 0.10%~0.40%、Sm 0.05%~0.35%、余量的Al和不可避免的杂质元素,其中La和Sm二者的总质量为0.15%~0.6%。本申请通过控制各元素组成在上述比例范围,调控合金的微观组织以提高力学性能,同时改善合金的铸造流动性,从而获得兼具较高强度、塑性的高强韧铸造铝合金。
High-toughness cast aluminum alloy as well as preparation method and application thereof
高强韧铸造铝合金及其制备方法和应用
2024-08-23
Patent
Electronic Resource
Chinese
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