Numerical simulation of temperature field and stress field in the lapping of W6Mo5Cr4V2 and Ni60A-WC dissimilar materials by axial laser cladding
Through the temperature field and stress field distribution of the high-speed steel(W6Mo5Cr4V2)and Ni60A-WC cladding lap on the axial plane,the influence of different laser power,lap sequence and lap ratio on the temperature field distribution and the stress distribution of dissimilar materials along the specific path of the lap cladding section are studied.The temperature field and stress field in the process of lapping cladding are simulated with ansys software,and the single factor variable method is used to simulate the parameters;The simulation re-sults of temperature field are verified by using infrared thermometer.The laser power has the greatest influence on the temperature field during the lapping process.With the increase of the laser power,the influence of the lapping sequence on the temperature field decreases.When the two lapping powers are 2 000 W,the maximum temperature first increases and then decreases with the increase of the lapping rate.When the lapping rate is 40％,the maximum temperature is the maximum.At the same time,the axial and radial stresses at the edges of the lapped coatings are compressive forces.The circumferential and radial stresses in the overlap area are tensile forces.Due to the differ-ence of thermophysical properties,the anisotropic stress of high-speed steel coating is larger than that of nickel based tungsten carbide coating.The temperature of each observation point was verified by experiment and simula-tion,and the maximum temperature error was 5.66％,which was in line with the expected value.
laser claddingsplicing of dissimilar materialnumerical simulationW6Mo5Cr4V2nickel based tung-sten carbide
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