期刊论文

Effects of the Molten Pool Behavior on Microstructure and Properties of Composite Coating on Titanium Alloy Surface by Laser Cladding

中文

装备制造技术

1672-545X

2017

2

120-123

10.3969/j.issn.1672-545X.2017.02.036

湖南省自然科学基金（NO.2015JJ6098）；

本校为第一机构

采用5 kW横流CO2激光器,在TC4钛合金表面激光熔覆原位制备掺Y2O3的复合陶瓷涂层。利用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、能量散射X谱仪（EDS）对熔覆层组织和物相进行分析;通过维氏显微硬度计对熔覆层和基材显微硬度进行测量。结果表明:随着扫描速度由10 mm/s和8 mm/s增大12 mm/s时,熔覆层表层和中部组织变得更加细化和致密,结合区组织由致密组织结构和稀疏的晶须网状结构变为单一的致密组织结构。当扫描速度为12mm/s时,熔覆层物相为Ti、TiC、TiB2、Y2O3;扫描速度为10 mm/s和8 mm/s时,熔覆层物相为Ti、TiC、TiB、Y2O3.扫描速度为10 mm/s和8 mm/s熔覆层的显微硬度提高的主要因素是生成...

The composite coating doped with Y203 was synthesized by alloy with 5 kW continuous wave CO2 laser. The microstructure laser cladding on the surface of TC4 titanium of laser cladding layers and composition of reinforced particles were analyzed using scanning electron microscope（SEM）,energy-dispersive X-ray spectroscopy （EDS） and X-ray diffraction （XRD） ,the micro-hardness of the laser cladding layer was tested using optical microscopy hardness tester. The results show that the microstructure of upper border area and middle zone was refine...