激光熔覆原位制备TiC_TiB复合陶瓷涂层的工艺参数优化.pdfVIP

HotWorkingTechnology2021，Vol.50,No.8

激光熔覆原位制备TiC/TiB复合陶瓷涂层的

工艺参数优化

李文鹏叭陈涛1^2,刘德福u

(1.中南大学机电工程学院，湖南长沙410083;2.高性能复杂制造国家重点实验室，湖南长沙410083)

摘要：通过激光熔覆技术，以Ti+B4C为原始粉末，在钛合金表面原位制备了TiC/TiB复合陶瓷涂层。基于响应面

法，建立了激光熔覆工艺参数与陶瓷涂层几何特征和显微硬度之间的数学模型，研究了激光功率、扫描速度和光斑直径

对涂层厚度、高度差和显微硬度的影响规律。结果表明，涂层的高度差随光斑直径增加而增大；显微硬度随激光功率增

加而提高；激光工艺参数对涂层厚度没有显著影响。对激光工艺参数进行优化，得到了一组较优的工艺参数：激光功率

/=400W、扫描速度F=7mm/s、光斑直径mm。

关键词：激光熔覆；工艺参数优化；响应面法;TiC/TiB复合陶瓷涂层

DOI:10.14158/j.cnki.1001-3814.

中图分类号：TG174.44文献标识码：A文章编号：1001-3814(2021)8-0092-05

ProcessParametersOptimizationofTiC/TiBCompositeCeramicCoatings

In-situFabricatedbyLaserCladding

LIWenpeng1-2,CHENTaou,LIUDefUu

(1.CollegeofMechanicalandElectricalEngineering,CentralSouthUniversity,Changsha410083,China;2.StateKey

LaboratoryofHighPerformanceComplexManufacturing,Changsha410083,China)

AbstractTiC/TiB：compositeceramiccoatingsonthesurfaceofTi6A14Valloywerein-situfabricatedusingTi+B4C

mixedpowdersasprecursormaterialsbylasercladding.Themathematicalmodelbetweenlasercladdingprocessparameters

andgeometricalcharacteristicormicro-hardnessoftheceramiccoatingswereestablishedinresponsesurfacemethodology.

Theeffectsoflaserpower,scanningspeedandspotdiameteronthethickness,heightdifferenceandmicrohardnessofthe

coatingswereexplored.Theresultsshowthattheheightdifferenceofthecoatingincreaseswiththeincreaseofspotdiameter.

Themicrohardnessofthecoatingsimproveswiththeincreaseoflaserp