Process for carburizing workpieces by means of a pulsed plasma d

Details Process for carburizing workpieces by means of a pulsed plasma d Process for carburizing workpieces by means of a pulsed plasma d

1995-07-05

1996-09-24

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

C23C 820

Patent

active

055587259

ABSTRACT:
Workpieces of carburizable materials, especially steels, are carburized by means of a pulsed plasma discharge in a carbon-containing atmosphere at pressures of 0.1-30 mbars and at pulsed voltages of 200-2,000 V, preferably of 300-1,000 V. A continuously applied baseline voltage, which is below the breakdown voltage, is superimposed on the pulsed voltage. The baseline voltage is preferably a direct-current voltage, which is in the range of 10-150 V, preferably of 20-100 V.

REFERENCES:
patent: 4490190 (1984-12-01), Speri
patent: 5127967 (1992-07-01), Verhoff
patent: 5383980 (1995-01-01), Melber et al.

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