Numerical Simulation And Analysis Of Process Intensification Of Plasma Arc Surface About40Cr

In recent years plasma surface treatment technology has been paid more and moreattention. Quenching technique of plasma surface treatment technology. The same for thehigh-energy heat source surface treatment technology, laser quenching effect and be roughlythe same, and has low cost, energy saving and environment protection and other features, thatmake it a rapid development solves a lot of problems. To better promote the plasma quenchingtechnology and process optimization, through experiments to establish the stable numericalsimulation to improve the production efficiency and manufacturing cost, is what we need tofocus on.Combined with the finite element analysis, the40Cr for the temperature of surfacequenching steel process field simulation. Study on temperature field and stress fielddistribution. Consider a consistent with the actual situation of the initial conditions andboundary conditions, in the ANSYS environment, to establish the Gauss model for threedimensional finite element model of plasma arc quenching heat source. Then through theindirect method shows that the residual stress distribution. Then do some simulation andanalysis to the different time and thickness of quenching.According to the influence of parameters of scanning speed, the plasma gun head nozzlediameter, current, voltage and air flow rate on plasma surface quenching effect, make fiveexperimental scheme, then using four degree of freedom robot autonomous design, carry onfive different plasma quenching with schemes for the40Cr specimen. Then using X-rayresidual stress measurement instrument for measuring plasma40Cr specimens after quenchingstress, and residual stress analysis. The experimental data show that the existence of theoriginal sample surface of a tensile stress but after quenching and high energy stress of samplesurface transformation occurs from the original tensile stress into compressive stress. Residualstress by increasing the diameter of the nozzle and the scanning speed decreases, with theplasma current, voltage and increase. Effect of argon flow rate on the plasma quenching isrelatively small. The theoretical analysis and experimental and experimental results are basically the same.