Laser cladding of Ni60/WC composite coatings on Ti6Al4V alloy and its effect on microstructure and properties

Abstract

Among its strong properties, titanium alloy is corrosion resistant, low density, and performs well at low temperatures. Aerospace, marine, automobile, armored, and biomedical equipment utilize it extensively. Titanium alloy also has some problems when used in some special environments, such as poor wear resistance and inadequate resistance to oxidation. By laser coating titanium alloy with Ni60/WC composite coating, the performance of titanium was better. To investigate impact of processing on cladding layer microstructure and properties, three different energy densities of 33.3 J/mm2, 46.7 J/mm2, and 53.3 J/mm2 were used for experiments. Between substrate coatings, there is strong metallurgical bonding at three laser energy densities. The coating’s microhardness first rises and then falls with increasing energy density. The performance of friction and wear coatings is superior to that of the substrate. Laser energy density at 33.3 J/mm2 has the best wear resistance coating.