The Influence of Annealing on Electrolytic Plasma Polishing of 304 Stainless Steel
The influence of annealing on the surface roughness,material removal rate and residual stress of 304 stainless steel by electrolyte plasma polishing was studied in here,which provides a basis for reducing the surface roughness and improving the sur-face performance of stainless steel parts.The residual stress of samples was changed by using the method of thermal aging,respec-tively under different temperature vacuum annealing treatment of stainless steel samples,and electrolytic plasma polishing experi-ments were carried out under the same process parameters(voltage,current density,electrolyte concentration,processing tem-perature and time).X-ray stress analyzer,surface roughness tester,hyper field optical microscope,and X-ray diffractometer(XRD)were used to measure and characterize the residual stress,roughness value,surface morphology,material removal rate,phase and tissue changes of the samples before and after polishing.The results show that the surface roughness and residual stress of 304 stainless steel can be reduced effectively,and the obvious grain orientation distribution.The higher the annealing tempera-ture,the smaller the surface residual stress and the lower the material removal rate.The thermal effect and microstructure trans-formation in the process of polishing are the main factors for the residual stress relaxation.
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