激光熔覆AlCoCrFeNiTi0.5合金涂层制备及其组织性能

摘要

采用激光熔覆方法制备AlCoCrFeNiTi0.5高熵合金涂层，研究了激光工艺参数对涂层成形及组织性能的影响。结果表明：激光功率为3.5 kW，扫描速度为300 mm/min，光斑直径5 mm时，单道熔覆涂层表面成形性最好。熔覆层主要为BCC结构固溶体，并且有Al80Cr13Co7和Al95Fe4Cr复杂相析出，涂层平均硬度已达到989 Hv。%AlCoCrFeNiTi high-entropy alloys coatings were prepared by laser cladding. And the effect of laser parameters on the forming,microstructure and property of the coatings were investigated in the thesis. The re-sults show that the quality of surface coating is good with smooth surface and compact structure when the laser power is 3.5 kW and scanning speed is 300 mm/min. The coating has BCC structure solid solution phase with Al80Cr13Co7 and Al95Fe4Cr complicated phases. The average hardness value is 989 HV when the laser power is 3.5 kW.