以快速凝固Al-4Ti-2V-3La合金作为研究对象,研究合金的显微结构、热稳定性和力学性能。提出为改善Al-Ti-RE基热强合金的显微组织和性能的合金设计原则,应进一步多元化,其中Ni、Cr元素比较理想,它们与Ti的物理性质相近,在α-Al中有较高的极限固溶度和较低的平衡固溶度,在高温有较低的扩散速率,具有较高的表面张力,并能改善熔体的微观不均匀性。 Al-4Ti-2V-3La alloy was rapidly solidified as a research object to study the microstructure, thermal stability and mechanical properties of the alloy. In order to improve the microstructure and properties of the Al-Ti-RE based alloys, the design principles of the alloys should be further diversified. Among them, Ni and Cr elements are ideal and have similar physical properties to Ti. In α-Al, Higher ultimate solid solubility and lower equilibrium solid solubility, lower diffusion rates at high temperatures, higher surface tension, and improved melt microscopic non-uniformities.