Tremendous studies were focused on the influence of single parameter on the properties of cladded coating, while scarce efforts have been devoted to investigate the coating performance affected by specific energy. Herein, the effects of laser specific energy in the range 40.0–88.9 J/mm² on the morphology, microstructure and properties of TiN/Ti₃AlN-Ti₃Al composite coating were analyzed. Results revealed that the dilution rate of the coating increased with increasing of specific energy, the coating at 58.3 J/mm² exhibited the least defects with dilution rate was about 14.0%. The coating was mainly composed of TiN, Ti₃AlN and Ti₃Al phases, the amount of Ti₃Al and TiN decreased slightly as the specific energy increased to 58.3 J/mm², whereas the Ti₃Al and TiN decreased remarkable when the specific energy increased further. Comparatively, when the specific energy reached 58.3 J/mm², the coating exhibited uniform distribution of TiN and finer microstructure, and core-rim structure formed in the coating. As a result, the microhardness of the composite coating was approximately 3 times higher than that of the substrate and the wear resistance was improved remarkably under optimum specific energy 58.3 J/mm². This study provided an insight for the development of high-performance Ti₃Al matrix composite coating.

大量的研究集中在单一参数对覆层涂层性能的影响上，而很少的努力致力于研究受比能量影响的涂层性能。在此，分析了激光比能在40.0-88.9 J / mm ²范围内对TiN / Ti ₃ AlN-Ti ₃ Al复合涂层的形貌，微观结构和性能的影响。结果表明，涂​​层的稀释率随比能的增加而增加，涂层在58.3 J / mm ^2处的缺陷最少，稀释率约为14.0％。该涂层主要由TiN，Ti中₃的AlN和Ti ₃的Al相，Ti量₃Al和TiN随比能增加至58.3J / mm ²而略有下降，而Ti ₃ Al和TiN随比能进一步增加而显着下降。相比之下，当比能达到58.3J / mm ^2时，涂层表现出TiN的均匀分布和更精细的微观结构，并且在涂层中形成芯-边缘结构。结果，复合涂层的显微硬度是基体的显微硬度的约3倍，并且在最佳比能58.3J / mm ²下显着提高了耐磨性。该研究为高性能Ti ₃ Al基复合涂层的发展提供了见识。