利用炉中高温拉伸设备对板厚为 5 mm 的 GH4169 镍基合金在 7 种测试温度 (450~1 050 ℃) ，应变速率分别为 0.01 和 0.001 s -1 时进行高温拉伸实验，获得材料在不同温度下的伸长率、屈服强度和抗拉强度，并对其高温拉伸变形行为进行分析，为该合金板材的高温拉伸成形制备和服役性能评估提供数据支持。 结果表明，应变速率为 0.001 s -1 ，温度高于 850 ℃ 时， GH4169 镍基合金板材的伸长率随着温度的升高持续增大，在 1 050 ℃ 时，伸长率最高可达 112% ，抗拉强度随着温度的升高持续减小，强度减小至 66 MPa ，仅为室温下的 7.1% 。应变速率为 0.01 s -1 时， GH4169 镍基合金板材的伸长率和抗拉强度变化具有相似的规律。 温度低于 800 ℃ 时，伸长率和抗拉强度随温度变化不大，保持了较高的强度；而随温度升高至 850 ℃ 时，材料产生了明显软化现象，应变硬化指数 (n) 值随着温度的升高而减小，塑性变形量明显增大。

GH4169 nickel-based alloy material with a plate thickness of 5 mm was subjected to high-temperature tensile experiments at seven test temperatures (450~1 050 ℃ ) and strain rates of 0.01 and 0.001 s -1 , respectively, using high-temperature tensile equipment in a furnace. The elongation, yield strength and tensile strength of the material at different temperatures were obtained, and the high-temperature tensile deformation behavior was analysed, which provided data support for the preparation of high-temperature tensile forming and service performance evaluation of the alloy sheet. The results show that when the strain rate is 0.001 s -1 and the temperature is higher than 850 ℃, the elongation of the GH4169 nickel-based alloy plate continues to increase with increasing temperature and reaches up to 112% at 1 050 ℃. The tensile strength decreases to 66 MPa with increasing temperature, which is only 7.1% at room temperature. When the strain rate is 0.01 s -1 , the elongation and tensile strength changes of the GH4169 nickel-based alloy sheet have similar trends. When the temperature is lower than 800 ℃ , the elongation and tensile strength do not change much with temperature, and a high strength is maintained. However, when the temperature increases to 850 ℃, the material has an obvious softening phenomenon, the strain hardening index n value decreases with increasing temperature, and the plastic deformation increases significantly.