Process for producing wear-resistant boride layers on metallic material surfaces
AssigneeBor Tec GmbH
InventorsHans-Jorg Hunger, Gunter Lobig, Gerhard Trute
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Abstract
A process is provided for producing wear-resistant boride layers on metal material surfaces. The process is characterized in that a boron halide selected from the group comprising boron trifluoride, boron tribromide, boron triiodide and their mixtures is mixed with hydrogen and optionally argon and/or nitrogen, in order to produce a reaction gas containing between 0.1 and 30 vol % boron halide. The resultant mixture is activated by a plasma discharge whereby boron is transferred from the plasma to the metal surface.
Claims7
A process for producing wear-resistant boride layers on a ferrous material surface which comprises
- (a) mixing boron triflouride as the boron source with hydrogen and optionally, argon, to generate a reaction gas containing from 1 to 35% by volume of boron triflouride,
- (b) in the resulting gas, converting the hydrogen into atomic hydrogen in the pressure range of 1-10 mbar by means of a pulsed plasma discharge so that the atomic hydrogen reduces the boron triflouride,
- (c) contacting the ferrous material surface, in a treatment space, with the reaction gas containing the converted hydrogen, and
- (d) converting FeB on the ferrous material surface to Fe2B.
Dependencies are inferred from the claim text.