粉末高温合金热挤压工艺参数的研究进展

Research Progress on Hot Extrusion Process Parameters of Powder Metallurgy Superalloys

摘要:

提高粉末高温合金等难变形合金的热加工性能是提高合金成形性、成材率和发展高性能合金的重要途径。合金制备工艺中的热挤压可以有效改善显微组织，提高合金的热加工性能。本文综述了近年来粉末高温合金热挤压工艺参数的研究进展，系统地探讨了热挤压参数对挤压过程和组织的影响，总结了热挤压参数选择与优化的研究工作。目前，挤压速度和挤压比对合金组织的影响、热挤压过程的数值模拟以及挤压结构的优化等需要进一步研究。借此为理解热挤压过程以及后续工程实践提供参考，并为调控合金组织、优化热加工工艺和提高热加工性能提供一定的理论指导和技术支持。

Abstract:

Improving the hot working performance of difficult-to-deform alloys, such as powder metallurgy superalloys, is an important way to improve their formability, yield rate and the development of high performance alloys. Hot extrusion can effectively improve the microstructure of the alloy and enhance its hot working properties during the preparation process. This paper reviews the research progress on hot extrusion process parameters of powder metallurgy superalloys in recent years, systematically discusses the influence of hot extrusion parameters on the extrusion process and microstructure, and summarizes the research work on the selection and optimization of hot extrusion parameters. At present, the influence of extrusion speed and extrusion ratio on alloy microstructure, numerical simulation of hot extrusion process and optimization of extrusion device need to be further studied. This paper is used to provide reference for understanding the hot extrusion process and subsequent engineering practice, and to provide certain theoretical guidance and technical support for regulating the alloy microstructure, optimizing the hot working process and improving the hot working performance.