Research Progress on The Preparation of Coatings Using Laser Cladding Technology
Using laser cladding technology,coatings with high strength,hardness,wear resistance,heat re-sistance,uniform and dense organization,and metallurgical bonding with the substrate can be prepared.The la-ser power,the melting speed,the shape of the powder feeding nozzle,and the form of light-powder coupling all influence the coating properties during the preparation of coatings using laser cladding technology.This paper first explains the principles,equipment,organizational characteristics and features of laser cladding technology and commonly used laser cladding materials.Then the performance of more advanced laser melting coatings such as gradient coatings,particle-enhanced composite coatings,and high-entropy alloy coatings is analyzed,and an advanced ultra-high-speed laser melting technology is introduced.Ultra-high-speed laser melting technology can focus laser energy on the powder and effectively realize the control of thermal influence on the substrate,which is expected to help realize the large-scale industrial production of laser melting coatings.Finally,the future devel-opment of laser clad coating is prospected.
NETL
NSTL
万方数据
维普
