Laser cladding Co-based alloy on surface of the brass was carried out by pre-deposited method.A three-dimensional finite element model for temperature was established

where the effects of temperature on thermo-physical parameters and surface convective heat transfer as well as radiant heat transfer were taken into account.The temperature field and stress field of laser cladding Co/Cu alloy were analyzed by the SYSWELD software.The results show that temperature field exhibits the tendency of non-steady state to steady state during the laser cladding process

and peak temperature of different points was reduced with serrated tendency at cross section of the cladding surface

and maximum residual stress can be observed in the middle layer of cladding surface nearby the matrix alloy.The desirable metallurgical boding with 11.5% dilution can be realized by scanning speed at 8 mm/s with the same other parameters

which is validated by the experiment.The acceptable powers of 2.96kW and 3.82kW are presented with scanning velocity of 6 mm/s and 10 mm/s by SYSWELD check.The results provide a reference for parameter optimization and control of dilution rate of laser cladding layer.