Study on Laser Cladding NiCrBSi+B_4C Compound Coating on Ti6Al4V Alloy
The laser cladding treatment of Ti6Al4V alloy was carried out using CO2 laser machine, with various mixture ratio of NiCrBSi and B4C, the (TiC+TiB2 ) reinforced titanium matrix composite was obtained through in-situ synthesis. The influences of processing parameters on laser cladding qualities and dilution rate were studied. The results show that under the laser cladding parameters of P =750 W, d =3 mm, δ =0.8 mm (NiCrBSi +2% B4C), δ =0.6 mm (NiCrBSi), v=5 mm/s, NiCrBSi and NiCrBSi+2%B4C clad layers are obtained, in which no pores and cracks appear and hard particles are uniformly distributed, and the clad layers are metallurgical bonded with TC4 alloy substrate.