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US 5,851,314 AGranted
Method for plasma carburization of metal workpieces
AssigneeIpsen International GmbH
InventorsWinfried Grafen, Bernd Edenhofer
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Abstract
A method for plasma carburization of metal workpieces in a furnace includes the step of introducing a mixture of propane and methane into the furnace atmosphere. The propane and methane mixture is cleaved under process conditions of plasma carburization to release pure carbon into the furnace atmosphere.
Claims8
A method for producing a plasma carburization atmosphere for metal workpieces in a furnace, said method comprising the steps of:
- providing process conditions of plasma carburization in a furnace;
- introducing a mixture consisting mainly of propane and methane into the furnace atmosphere of the furnace in order to provide high carbon mass flow density and to prevent soot formation;
- and
- cleaving propane and methane under the process conditions of plasma carburization to release pure carbon at high carbon mass flow density into the furnace atmosphere for plasma carburization without soot formation.
1 more element
Dependencies are inferred from the claim text.