一种细晶铸造K465合金低压涡轮叶片组织和力学性能  

Microstructure and Mechanical Properties of K465 Alloy Low Pressure Turbine Blade Produced by Fine Grain Casting Technology

作　　者：尹湘蓉 黄中荣 龙阅文 佘玉良 龚晓宁 郭志飞 YIN Xiang-rong;HUANG Zhong-rong;LONG Yue-wen;SHE Yu-liang;GONG Xiao-ning;GUO Zhi-fei(AECC Aero Science and Technology Co.,Ltd.,Chengdu 610503,Sichuan,China)

机构地区：[1]中国航发航空科技股份有限公司,四川成都610503

出　　处：《铸造》2021年第1期53-57,共5页Foundry

摘　　要：为提高叶片铸件质量和生产效率,对某型机K465合金低压涡轮叶片开展细晶铸造工艺研究,对细晶铸造的精铸低压涡轮叶片的显微疏松、组织进行观察,力学性能及极限疲劳性能进行测试,并与原工艺的叶片对比,验证晶粒细化对涡轮叶片晶粒度和疲劳强度的影响。结果表明,细晶铸造工艺能使叶片铸件低倍晶粒度、枝晶间距细化,叶片的显微疏松、显微组织与原工艺相比没有变化,但室温拉伸强度略有提高,极限疲劳强度更优。In order to improve the casting quality and production efficiency, the study on K465 alloy low pressure turbine blade produced by fine grain casting technology was conducted. The micro-porosity, microstructure, properties and ultimate fatigue strength were compared with that produced by original casting process. It was found that the refinements of grain size and dendritic arm spacing are significant by using fine grain casting technology, and the micro-porosity and microstructure are similar to that produced by original casting process, but the room temperature tensile strength and the ultimate fatigue strength are improved.

关 键 词：K465合金 低压涡轮叶片 细晶铸造 晶粒度 力学性能 

分 类 号：TG290.8[金属学及工艺—铸造]