The Numerical Simulation Of Temperature And Stress Field In High Frequency Induction Cladding

Induction Cladding refers to the use of induction heating to make the coating melting,which can rapidly and efficiently across a large area of cladding layer, and lower productioncosts, to achieve the requirements, has broad application prospects. Control of the moltencoating effect, you need to know when the coating of the workpiece melting temperature fieldand melt the stress field distribution. However, the actual operation is difficult to accuratemeasurement of melt coating the workpiece temperature field in time and space distribution ofthe corresponding melt coating the workpiece stress field distribution is difficult to measure.According to the principle of induction melting coating, the use of ANSYS software, researchand the workpiece in a mobile induction heating magnetic-thermal simulation of thecoupling field, the temperature as the applied load, the value of the stress field on theworkpiece after cooling Cladding simulation, and obtained results.First, create a mathematical model of the workpiece coupling in induction heating field.Departure from the efficient computation, the introduction of the magnetic vector potentialmethod to calculate the eddy current field is convenient, reasonable and necessarysimplification. Established a mathematical model of the temperature field of induction heating,the use of the Galerkin method with discrete control equation of the eddy current field andtemperature field, and finally get a computational model of the coupling field.Senondly，workpiece moving, the temperature of the workpiece at any time of the eachpart of it the first position (time), temperature and heating lead to a superposition of thetemperature variation. ANSYS numerical simulation of molten coating temperature field todeal with the problem of material properties in the simulation with temperature changes, theinduced current interaction and radiation air convection, and finalize the multi-field solvermethod as the method of calculation of this article. Are four conditions on the cylindricalshape of the sample to simulate the influence of current density and frequency on thetemperature field distribution in time and space.Finally how ANSYS software used in the numerical simulation of the stress field in theInduction Cladding, combined with the characteristics of the workpiece, thermal-stresstransient calculation of the coupling field, sub-melt coating followed by air cooling andasbestos ashes slow cooling in two ways on the workpiece the distribution of stress field simulation solution. The corresponding force field simulation results of simple analysis, thetheory explains the formation of tensile and compressive stress, and the coating will not crack.Simulated data confirmed the slow cooling ashes of asbestos, can reduce the thermal residualstress in the melt coated workpiece.