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发明公开
CN104372276A 改善GH4698合金高温性能的方法 有权 转让

改善GH4698合金高温性能的方法
摘要：
改善GH4698合金高温性能的方法，本发明涉及GH4698合金高温性能的改进工艺，它为了解决现有工艺处理后的GH4698合金高温力学性能不稳定的问题。改善高温性能的方法：一、将GH4698合金放入热装炉中，炉温升温到980℃±10℃，保温3.5～4.5小时后炉冷至室温，得到预热后的GH4698合金；二、炉温升至1100℃±10℃进行固溶处理；三、炉温升至1000℃±10℃进行二次固溶处理；四、炉温升至775℃±10℃进行时效处理；五、炉温升至700℃±10℃进行补充时效处理。应用本发明热处理工艺后的GH4698合金在温度为750℃条件下，高温持久寿命达到130小时以上。
摘要（英）：

The invention provides a method for improving high-temperature properties of a GH4698 alloy, relating to a technique for improving high-temperature properties of a GH4698 alloy and solving the problem of unstable high-temperature mechanical properties of the GH4698 alloy treated by the existing technique. The method comprises the following steps: 1. putting the GH4698 alloy into a hot charging furnace, heating to 980+/-10 DEG C, keeping the temperature for 3.5-4.5 hours, and carrying out furnace cooling to room temperature, thereby obtaining the preheated GH4698 alloy; 2. heating to 1100+/-10 DEG C to carry out solution treatment; 3. heating to 1000+/-10 DEG C to carry out secondary solution treatment; 4. heating to 775+/-10 DEG C to carry out aging treatment; and 5. heating to 700+/-10 DEG C to carry out supplementary aging treatment. The high-temperature service life of the GH4698 alloy treated by the heat treatment technique is up to more than 130 hours at the temperature of 750 DEG C.

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