GH4169合金锻造叶片腐蚀条带研究  

Research of Etched Bands in GH4169 Alloy Forged Blades

作　　者：田成刚 徐瑶 王妙全 张燕 张国栋 TIAN Chenggang;XU Yao;WANG Miaoquan;ZHANG Yan;ZHANG Guodong(AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China)

机构地区：[1]中国航发商用航空发动机有限责任公司,上海200241

出　　处：《热加工工艺》2022年第21期80-83,86,共5页Hot Working Technology

摘　　要：利用叶片锻造设备进行了GH4169合金第八级、第九级叶片的生产试制,分析了叶片不同部位腐蚀条带的形貌与特征,揭示了腐蚀条带的形成机制。结果表明,GH4169合金第八级叶片叶身、第九级叶片榫头部位容易产生腐蚀条带,主要与δ相偏聚有关,叶身暗腐蚀条带部位的偏聚δ相呈近似平行位向排列,以短棒状或颗粒状居多,晶粒尺寸与铌元素含量正常;榫头亮腐蚀条带部位的偏聚δ相以长条状居多,晶粒细小、铌元素含量高。GH4169合金锻造叶片δ相偏聚条带的形成除与铌元素含量偏高有关外,还与叶片局部大变形相关,局部大变形为δ相形核、偏聚提供驱动力。The trial production of the eighth and ninth stage blades of GH4169 alloy were carried out by using the blade forging equipment. The morphology and characteristics of corrosion bands in different parts of blades were analyzed, and the formation mechanism of corrosion bands was revealed. The results show that the corrosion bands of GH4169 alloy’s eighth grade blade body and ninth grade blade tenon are mainly related to δ segregation. The segregated δ phases in the dark corrosion strip of the leaf body are mostly short rod or granular shape and they are approximately parallel, and the grain size and niobium content are normal. The segregation δ phase in the bright etched bands of blade tenon mostly exhibits long strip shape, and the grain size is fine and the niobium content is high. The formation of δ phase segregation band in forged blades of GH4169 alloy is not only related to the high niobium content, but also to the local large deformation of the blades, which provides the driving force for δ phase nucleation and segregation.

关 键 词：GH4169合金 锻造叶片 腐蚀条带 δ相偏聚 

分 类 号：TG316.192[金属学及工艺—金属压力加工]