The effects of Aluminium additives on the quality of High-speed Steel Laser Cladding

Defects or deficiencies in the repairing surface during the High Power Laser Cladding will be caused by the impertinent process, unstable equipment performance, cladding powder and other factors. Among the factors that the liquidity of powder in the pool can influence the surface topography directly; In addition, the existence of Oxygen (O) will lead to the formation of pores. Analysis through the experiments shows that: the addition of Aluminium (Al) additives will increase the liquidity of the powder pool effectively during the cladding process, simultaneously, Al₂O₃, generating from the combination of Al and O, will restrain pores and protect the surface of the cladding layer without reducing the hardness.