Niobium microalloyed multi-element complex cast aluminum bronze alloy

The invention discloses a niobium microalloyed multi-element complex cast aluminum bronze alloy. The aluminum bronze alloy contains the components of, in percentage by mass, 7.5%-8.5% of Al, 3.0%-4.0%of Fe, 2.0%-2.5% of Ni, 11.0%-13.0% of Mn, 0.2%-1.0% of Nb, and the balance Cu. According to the niobium microalloyed high-performance multi-element complex cast aluminum bronze alloy, an aluminum bronze alloy system is taken as a substrate, and grains are greatly refined through niobium microalloying to obtain the high-performance niobium microalloyed aluminum bronze alloy so that the strength and the hardness of the alloy can be remarkably improved. 本发明公开了一种铌微合金化的多元复杂铸造铝青铜合金，该合金按质量百分比为：Al：7.5～8.5％，Fe：3.0～4.0％，Ni：2.0～2.5％，Mn：11.0～13.0％，Nb：0.2～1.0％，余量为Cu。本发明的铌微合金化的高性能多元复杂铸造铝青铜合金以铝青铜合金体系作为基体，通过铌微合金化极大细化晶粒得到一种高性能的铌微合金化铝青铜合金，可以显著提高合金的强度和硬度。