应用激光, 2016, 36 (4): 471, 网络出版: 2016-10-19  

高Al+Ti镍基高温合金激光增材修复液化裂纹形成机理及控制研究进展

Research Progress on Cracking Mechanism and Control of Laser Additive Repaired Nickel-based Superalloys with High Content of Al+Ti
作者单位
1 西北工业大学 凝固技术国家重点实验室, 陕西 西安 710072
2 洛阳船舶材料研究所, 河南 洛阳 471023
3 南昌航空大学 轻合金加工科学与技术国防重点学科实验室, 江西 南昌 330063
摘要
高Al+Ti镍基高温合金由于具有良好的高温强度及耐腐蚀性能而被广泛应用于航空发动机的热端零部件, 然其服役环境恶劣, 在长期使用过程中极易发生损伤。激光增材修复技术因其可以实现对损伤构件复杂几何形状和力学性能的高效恢复, 已逐渐成为航空航天及民用燃机发动机热端部件修复的一条重要技术途径。不过, Al+Ti含量高也意味着合金在激光作用过程中具有较高的开裂敏感性, 易于导致修复失效。系统地介绍了国内外具有代表性的激光增材制造/修复高Al+Ti镍基高温合金过程中液化开裂的最新研究进展, 指出其目前存在的问题和今后主要的研究方向。
Abstract
Nickel-based superalloys with the high content of Al and Ti elements, which possess the excellent elevated temperature strength and the superior hot corrosion resistance, are thus widely used in aeroengines. But their components are damaged easily in severe service conditions. Laser additive repairing (LAR), which can accomplish the high effective recoveries of the complex geometrical shape and mechanical properties for the damaged parts, has gradually become an important technique for the repair of damaged aeroengine parts. However, for this kind of nickel-based superalloys, containing high content of Al and Ti elements also means that they have high cracking sensitivity in laser processing. In present papers, the typical latest research progress on liquation cracking of nickel-based superalloys with high Al+Ti content in the process of laser additive manufacturing/repairing is introduced systematically, and the main present problems and future research directions are pointed out as well.

李秋歌, 林鑫, 王杏华, 刘丰刚, 刘奋成, 杨海欧, 黄卫东. 高Al+Ti镍基高温合金激光增材修复液化裂纹形成机理及控制研究进展[J]. 应用激光, 2016, 36(4): 471. Li Qiuge, Lin Xin, Wang Xinghua, Liu Fenggang, Liu Fencheng, Yang Haiou, Huang Weidong. Research Progress on Cracking Mechanism and Control of Laser Additive Repaired Nickel-based Superalloys with High Content of Al+Ti[J]. APPLIED LASER, 2016, 36(4): 471.

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