摘要
近年来,随着单晶涡轮叶片气冷结构的复杂化和尺寸的大型化,单晶叶片制备过程中容易出现选晶失败、取向偏离、条纹晶、大角晶界、缘板杂晶、再结晶、雀斑等多种凝固缺陷,导致单晶高温合金性能降低,造成叶片报废。为了减少这些凝固缺陷,提高单晶品质,获得结构完整的单晶组织,熟悉单晶叶片生长过程中的各种常见缺陷,掌握凝固缺陷的形成规律及其控制技术就显得尤为重要。针对这一现状,系统地介绍了单晶叶片生长过程中常见的凝固缺陷,以及凝固缺陷形成规律和控制方法,为减少单晶叶片缺陷,提高叶片品质和合格率奠定了坚实的理论基础,提供了有力的技术保障。
In recent years,with the complexity of the gas-cooled structure and the large-scale size of the single-crystal turbine blade,the production of single-crystal blade is more prone to crystal selection failure,orientation deviation,sliver,large angle grain boundary,stray grain in the platform,recrystallization,freckles and other defects,which lead to the reduction of high-temperature alloy performance of single crystal turbine blade,and eventually cause the scrapping of single-crystal blade.In order to reduce these defects in single crystal blade,improve the quality of single crystal,and obtain a complete structure of single crystal structure,it is very important to be familiar with various common defects in the production of single crystal blade,realize the formation rules of defects,and master the defect inhibition technology.On this basis,the common solidification defects in the production of single crystal blades,as well as the formation rules and inhibition methods of solidification defects were systematically introduced,which lays a solid theoretical foundation for reducing the defects of single crystal blades and improving the quality and qualification rate of blades,and provides a strong technical support.
作者
李金国
孟祥斌
刘纪德
张朝威
梁静静
李力刚
Li Jinguo;Meng Xiangbin;Liu Jide;Zhang Chaowei;Liang Jingjing;Li Ligang(Institute of Metal Research,Chinese Academy of Sciences;School of Mechanical and Automotive Engineering,Qilu University of Technology(Shandong Academy of Sciences);Shenyang Institute of Automation,Chinese Academy of Sciences)
出处
《特种铸造及有色合金》
CAS
北大核心
2021年第11期1321-1327,共7页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(U1508213,51771190,51601102,51871221)
国家科技重大专项资助项目(J2019-Ⅵ-0023-0139,2017-Ⅵ-0003-0073)
山东省自然科学基金面上项目(ZR2020ME110)
西北工业大学凝固技术国家重点实验室资助项目(SKLSP201847,SKLSP201834)
齐鲁工业大学青年博士合作项目(2018BSHZ003)
德阳市开放式校市合作技术研发项目(2018CKJ001)。
关键词
单晶高温合金
定向凝固
凝固缺陷
形成规律
控制方法
Single Crystal Superalloy
Directional Solidification
Solidification Defect
Formation Law
Inhibition Method