Research on Liquid Plasma Surface Stengthening of Stainless Steel
The technology which uses high-pressured pulse power source (voltage 250~600V, frequency 1500 Hz) onto stainless steel (1Cr18Ni9Ti )in glycol-sodium chloride electrolyte was studied taking graphite as the anode and the specimen as negative pole. The micro-area plasma was observed on the surface of the specimen. Via treatment of 3~5 min, a layer about 0.2 mm was obtained on the surface of specimen. The results show that the microhardness of the stainless steel is enhanced from 175.6 HV of central section to 513.2 HV of edge; a lot of new tissue(Fe-Cr-Ni-C)is observed on the surface of the stainless steel by the detection of XRD, which strengthens stainless steel on the condition of our test. This research brings a new way to strengthen the stainless steel(1Cr18Ni9Ti).