高性能涡轮盘材料GH4065及其先进制备技术研究
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- 英文论文题名：Investigation of High Performance Disc Alloy GH4065 and Associated Advanced Processing Techniques
- 论文作者：张北江 ; 赵光普 ; 张文云 ; 黄烁 ; 陈石富
- 英文论文作者：Zhang Beijiang ; Zhao Guangpu ; Zhang Wenyun ; Huang Shuo ; Chen Shifu ; High Temperature Materials Research Division ; Central Iron & Steel Research Institute
- 年：2015
- 作者机构：钢铁研究总院高温材料研究所;
- 论文关键词：镍基高温合金 ; 盘形锻件 ; 铸锻工艺 ; 微观组织 ; 力学性能
- 英文论文关键词：Ni-based superalloy ; disc forging ; ingot metallurgy ; microstructure ; mechanical property
- 会议召开时间：2015-05-20
- 会议录名称：第十三届中国高温合金年会论文集
- 英文会议录名称：Proceedings of the 13th China Superalloys Conference
- 语种：中文
- 分类号：V263
- 学会代码：ZGJS
- 会议名称：第十三届中国高温合金年会
- 会议地点：中国北京
- 主办单位：中国金属学会高温材料分会
- 学会名称：中国金属学会
- 页数：1
- 文件大小：61k
- 原文格式：O
- 会议级别：全国
摘要
在对一系列高合金化模型合金进行系统比选研究的基础上,发展了新型的GH4065变形高温合金,该合金化学成分与Rene 88 DT合金类似,并针对铸锻制备工艺的要求进一步实施了优化。研制结果表明,应用三联低偏析熔铸和多重循环热机械处理等新型技术生产的GH4065合金,适用于制备先进航空发动机关键热端转动部件,综合性能完全满足高压压气机盘和低压涡轮盘的工况要求,必要时可以作为高压涡轮盘的高可靠性、低成本解决方案。随着变形高温合金材料和制备工艺的发展,应用铸锻工艺制备的高性能涡轮盘材料能够满足先进航空发动机的技术要求。
Much attention has been paid to the development of more advanced materials for high-pressure compressor and turbine discs of gas turbine engines.A high performance wrought superalloy GH4065 for disc applications has been recently developed based on the comprehensive evaluation of a series of model alloys with characteristic chemical composition,lattice parameter,particularly γ' volume fraction.The concentration of major alloying elements of GH4065 is closely similar with Rene88 DT and specifically optimized considering the demands of ingot metallurgy technologies.Large scale vacuum arc remelting(VAR) ingots of GH4065 alloy with diameter up to 508 mm have been produced via standard triple melting techniques.Microscale segregation of alloying elements on large VAR ingot has been effectively suppressed due both to optimized alloying elements concentration and to improved melting techniques.VAR ingot of GH4065 exhibits extraordinary hot plasticity,ingot conversion can be accomplished using conventional open die forging procedure.Fine and uniform γ+γ' duplex structures can be obtained on billets and disc forgings via a newly developed multi-cycle thermomechanical processing method.Full scale turbine discs of GH4065 alloy with diameter of 630 mm achieve an optimal combination of creep resistance,fatigue Life time and ductility.GH4065 discs exhibit extraordinary microstructural and property stability during prolonged thermal exposure,which means that dendritic segregation has been successfully restricted to an acceptable level.The results reveal that highly alloyed disc alloys produced via ingot metallurgy techniques exhibit lower costs and higher productivity,and can still meet the ever increasing demand of high performance gas turbine engines.
Much attention has been paid to the development of more advanced materials for high-pressure compressor and turbine discs of gas turbine engines.A high performance wrought superalloy GH4065 for disc applications has been recently developed based on the comprehensive evaluation of a series of model alloys with characteristic chemical composition,lattice parameter,particularly γ' volume fraction.The concentration of major alloying elements of GH4065 is closely similar with Rene88 DT and specifically optimized considering the demands of ingot metallurgy technologies.Large scale vacuum arc remelting(VAR) ingots of GH4065 alloy with diameter up to 508 mm have been produced via standard triple melting techniques.Microscale segregation of alloying elements on large VAR ingot has been effectively suppressed due both to optimized alloying elements concentration and to improved melting techniques.VAR ingot of GH4065 exhibits extraordinary hot plasticity,ingot conversion can be accomplished using conventional open die forging procedure.Fine and uniform γ+γ' duplex structures can be obtained on billets and disc forgings via a newly developed multi-cycle thermomechanical processing method.Full scale turbine discs of GH4065 alloy with diameter of 630 mm achieve an optimal combination of creep resistance,fatigue Life time and ductility.GH4065 discs exhibit extraordinary microstructural and property stability during prolonged thermal exposure,which means that dendritic segregation has been successfully restricted to an acceptable level.The results reveal that highly alloyed disc alloys produced via ingot metallurgy techniques exhibit lower costs and higher productivity,and can still meet the ever increasing demand of high performance gas turbine engines.
引文