The microstructure of alloy Al – 2.5% Fe – 1.5% Cr obtained by crystallization from melt at cooling rates of 0.5 – 940 K/sec and the effect of the type of the initial microstructure on the behavior of the alloy under laser treatment are studied. An x-ray phase analysis of cast alloys is conducted, the solidus temperature and the microstructure are determined. The Thermo-Calc software is used to plot polythermal sections of the Al – Fe – Cr system, and the changes in the mass fraction of the hard phases in the structure are computed. It is shown that elevation of the cooling rate in crystallization of the alloy causes decrease in the concentration of the primary crystals of the Al₄₅Cr₇ phase until their total disappearance and formation of a homogeneous microstructure. The surface of the specimens is treated with a laser beam, and then the microstructure of cross sections of the tracks obtained is investigated. This type of surface treatment imitates the impact on the material in additive technologies. Laser treatment of the surface of the alloy raises the hardness substantially (from 43 to 77 HV), which is explainable by formation of a supersaturated aluminum solid solution and a small size of the dendrite cells.

研究了合金Al – 2.5% Fe – 1.5% Cr在0.5 – 940 K/sec的冷却速率下从熔体结晶获得的显微组织以及初始显微组织类型对合金在激光处理下的行为的影响。对铸造合金进行 X 射线相分析，确定固相线温度和显微组织。Thermo-Calc 软件用于绘制 Al-Fe-Cr 系统的多热截面，并计算结构中硬相质量分数的变化。_{结果表明，合金结晶冷却速度的提高导致Al 45} Cr ₇的初晶浓度降低。相直到它们完全消失并形成均匀的微结构。用激光束处理试样表面，然后研究获得的轨迹横截面的微观结构。这种类型的表面处理模仿了添加剂技术对材料的影响。合金表面的激光处理显着提高了硬度（从 43 到 77 HV），这可以通过形成过饱和的铝固溶体和小尺寸的枝晶单元来解释。