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This paper was concerned with commercial pure iron plasma nitride at different bias voltages by high frequency and low voltage plasma nitriding. The results showed that the microstructure of the nitride layers was strongly influenced by the bias voltages. Compared with −1.5 kV and −2.5 kV, the pure iron plasma nitriding at −3.5 kV has the best wear resistance and corrosion resistance and its microhardness...
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