单晶高温合金热腐蚀行为及其改善方法研究现状  

Research Progress on the Hot Corrosion Behavior and Improvement Method of Single Crystal Superalloys

作　　者：李佳煜 樊江昆[1,2] 宋岳林 杨洪赐 袁睿豪 寇宏超 李金山[1,2] LI Jiayu;FAN Jiangkun;SONG Yuelin;YANG Hongci;YUAN Ruihao;KOU Hongchao;LI Jinshan(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;National and Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials,Xi'an 710072,China)

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]先进金属材料精确热成型技术国家地方联合工程研究中心,陕西西安710072

出　　处：《铸造技术》2022年第10期841-855,共15页Foundry Technology

基　　金：国家科技重大专项(J2019-VI-0023-0140,MJ-2018-G-48);凝固技术国家重点实验室自主研究课题(2022-TS-04)。

摘　　要：单晶高温合金是制造航空发动机及燃气轮机热端涡轮叶片的重要材料,然而单晶叶片工作环境中腐蚀性燃气的存在严重影响了其服役寿命。本文围绕单晶高温合金的热腐蚀行为回顾了近年来镍基单晶高温合金的发展历程,针对单晶高温合金的典型应用和真实服役条件,介绍了高温熔盐热腐蚀机理模型、应力腐蚀与热腐蚀疲劳,以及热腐蚀行为的取向各向异性。从成分调控、稀土元素添加、防腐涂层和表面改性技术等4个方面介绍了单晶高温合金抗热腐蚀性能的改善方法。最后,根据对现有研究成果的分析,总结了单晶高温合金热腐蚀研究面临的挑战,提出了未来单晶高温合金热腐蚀行为领域可能的研究方向。Single crystal superalloys are an important material for manufacturing aero-engines and gas turbine hot-end turbine blades. However, the presence of corrosive gas in the working environment of single crystal blades seriously affects their service life. This paper reviews the development of nickel-based superalloys in recent years, focusing on the hot corrosion behavior of single-crystal superalloys. According to the typical applications and real service conditions of single crystal superalloys, the molten salt corrosion mechanism model, stress corrosion and hot corrosion fatigue, and the orientation of anisotropic hot corrosion behavior are introduced. The methods for improving the hot corrosion resistance of single crystal superalloys are introduced from four aspects: composition regulation, the addition of rare earth elements,anti-corrosion coating, and surface modification technology. Finally, based on the analysis of the existing research results,the challenges in the research of hot corrosion of single-crystal superalloys are summarized, and possible research directions in the field of hot corrosion behavior of single-crystal superalloys in the future are also proposed.

关 键 词：单晶高温合金 热腐蚀 服役性能 改善方法 

分 类 号：TG132.32[一般工业技术—材料科学与工程]