Test and temperature field of finite elementsimulation about the effect of scanning speed on304 stainless layer's properties by laser cladding

摘要

A 304 stainless layer was obtained by laser cladding on the surface of 45 steel using the way ofpre-setting powder with the equipment of 5 kW transverse flow CO_2 laser processing.Temperature field of 304 stainless layer in the laser cladding process was finite analysed by thesoftware of ANSYS.The analysing process considered the heat source model the latent heat ofphase change the unit of surface effect the mesh generation and the technology of elementbirth, etc.Effect of scanning speed on the dilution rate was analysed, and was compared withactual results.Then, results were analysed.The finite element analysis and result of experimentshowed that the highest temperature the dilution rate and the width of the cladding laser wereinversely proportional to the scanning speed of laser, and the height of cladding layer is indirectly proportional to the scanning speed; the finite element analysis of temperature fieldsufficiently reflected the characteristic of rapid heating and cooling in the laser claddingprocess; the trend and numerical value of the dilution rate between experiments and finiteelement simulations about laser cladding 304 stainless steel are basically anastomosing.