热处理工艺对GH4169合金组织及力学性能影响的研究进展

    Review on Effects of Heat Treatment Processes on Microstructure and Mechanical Properties of GH4169 Superalloy

    • 摘要: GH4169合金作为沉淀强化型变形高温合金,主要应用于航空航天、石油化工以及核工业等领域的关键部件,使用温度为-250~650℃。无论是采用传统加工工艺还是新型增材制造工艺,所制备的GH4169合金在应用前都需经过合适的热处理以保证合金具备良好的综合性能,从而满足苛刻的服役要求。系统总结了不同热处理工艺条件下GH4169合金的显微组织演化、析出相特征及其对力学性能的影响规律,重点分析了热处理制度对合金硬度、室温与高温拉伸性能及持久性能的影响规律,以便为热处理制度优化与合金性能提升提供依据。

       

      Abstract: As a precipitation-strengthened wrought superalloy, GH4169 is mainly used in key components of aerospace, petrochemical, and nuclear industries, with a service temperature range of -250 ℃ to 650 ℃. Whatever the GH4169 superalloy components have been prepared by traditional processing technologies or advanced additive manufacturing processes, they need to undergo rational heat treatment before application to ensure excellent comprehensive properties and then meet the harsh service requirements. The microstructural evolution, precipitate characteristics, and their correlative effects on the mechanical properties of GH4169 superalloy treated by various heat treatment schemes were systematically summarized. The influences of heat treatment schemes on the alloy's hardness, room-temperature and high-temperature tensile properties, as well as stress rupture behavior were thoroughly elucidated, providing a foundational reference for the optimization of heat treatment process and the improvement of alloy performance.

       

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