电焊机2025，Vol.55Issue(9)：19-27,9.DOI:10.7512/j.issn.1001-2303.2025.09.02
某型发动机二级涡轮导向器服役后微裂纹焊接修复研究
Research on Welding Repair of Microcracks after Service of Secondary Turbine Guide Apparatus
李威 1周俊 1林开章 1许世明 1葛海锋1
作者信息
- 1. 成都国营锦江机器厂,四川 成都 610043
- 折叠
摘要
Abstract
The material of a certain type of engine secondary turbine guide apparatus is a Russian-made nickel-based cast su-peralloy,which is similar to the domestic brand K412.In this paper,the evolution of the material properties of the secondary turbine guide apparatus with different service life periods is studied by means of metallographic,high-temperature tensile and thermal shock,as well as the welding repair method for secondary turbine guide apparatus cracks combined with solid solution heat treatment.The results show that the number of cracks generated by the secondary turbine guide apparatus dur-ing the 1500 h service period is small,and the material mechanics and process properties are well maintained,and the micro-cracks on the surface of the secondary turbine guide apparatus can be successfully repaired by TIG welding.The number of cracks in the service period of 2500 h is large,the matrix material is aging,the mechanical properties are obviously reduced,and the fusion welding performance is poor,and the direct TIG welding without solution treatment is easy to cause new cracks,and the more times of TIG welding,the easier it is to increase the probability of welding cracks and increase the diffi-culty of repair.Vacuum brazing or solution treatment with TIG welding can be used to repair the cracks of the secondary tur-bine guide apparatus during the service life of 2500 h.关键词
K412高温合金/微裂纹修复/氩弧焊/真空钎焊/二级导向器Key words
K412 superalloys/microcracks repair/TIG welding/vacuum brazing/secondary turbine guide apparatus分类
矿业与冶金引用本文复制引用
李威,周俊,林开章,许世明,葛海锋..某型发动机二级涡轮导向器服役后微裂纹焊接修复研究[J].电焊机,2025,55(9):19-27,9.
