GH4169合金研制进展-中国材料进展

文章信息/Info

Author(s):: DU Jinhui; LU Xudong; DENG Qun; ZHUANG Jingyun; （Central Iron & Steel Research Institute, Beijing 100081, China）

摘要:: GH4169合金具有较高的高温强度，优异的持久、蠕变和疲劳性能，同时具备良好的加工和焊接性能，广泛用于航空、航天、石化等领域。随着航空、航天发动机性能的不断提高，对发动机关键用材GH4169在承温能力、持久蠕变性能和抗疲劳性能提出了更高要求，以满足先进航空发动机高性能、高可靠性、长寿命的需求。从合金改型、冶炼工艺优化、热加工技术提升等方面，系统论述了GH4169合金近50年基础研究成果及工程制备技术的进展。内容包括基于提高热稳定性，发展适应更高使用温度的改型合金的合金化原理；基于制备大尺寸、无偏析、纯净化铸锭的三联冶炼工艺技术进步；基于制备细晶棒材的快锻和径锻联合开坯的热加工技术提升；基于实现近净成形超塑性变形的热模锻和等温锻的最新进展。

Abstract:: As a result of higher high temperature strength, excellent rupture stress, creep and fatigue properties, as well as good processing and welding performance, GH4169 alloy has been widely used in aerospace, petrochemical and other fields. With continuous improvement on performance of aeronautical and astronautical engines, some higher requirements were put forward to the key material GH4169 Such as temperature bearing capability, rupture stress and creep properties as well as fatigue resistant performance were improved to meet the demands of high performance, high reliability and long service life of the advanced aeroengines. The achievement of basic research and development of industrial manufacture technologies were systematically expounded from aspects of alloy modification, optimization of melting process, improvement of hot deformation technology for the past fifty years in this paper. Expounded contents include: development of alloying principle of modified alloy with higher temperature bearing capability for improving the thermal stability; triple melting technology for the preparation of large sizd clean ingot without segregation, promotion of hot processing technology of press forging and radial forging combination for the preparation of fine grained bar; new progress of hot die forging and isothermal forging for the realization of near net forming.