Austenitic steel AFA alloyed with 4% Al is studied in the state as delivered and after annealing at 1050 and 1230°C. The chemical composition of the steel is determined, the microstructure is analyzed, and the morphology of the secondary phases is studied using scanning electron microscopy and diffraction analysis. The high-temperature creep curves are plotted. The variation of the properties of the steel is analyzed after the creep tests. The annealing is shown to affect positively the creep resistance of steel AFA. The parameters of high-temperature creep are higher after the annealing at 1230°C; the rate of steady creep is equal to 1.61 × 10 ^{– 6} sec ^{– 1}; the activation energy is 608.2 kJ/mole.

研究了含 4% Al 合金的奥氏体钢 AFA 在交付状态下以及在 1050 和 1230°C 退火后的状态。确定钢的化学成分，分析显微组织，并使用扫描电子显微镜和衍射分析研究二次相的形态。绘制了高温蠕变曲线。在蠕变试验后分析钢的性能变化。退火表明对钢 AFA 的抗蠕变性有积极的影响。1230℃退火后高温蠕变参数较高；稳定蠕变速率等于 1.61 × 10 ^{– 6} sec ^{– 1}；活化能为 608.2 kJ/mole。