Plasma nitriding surface treatment method for gray cast iron part
AssigneeHyundai Motor Company
InventorsJae Young Lee, Seong Jin Kim, Jai Min Han, Yoon Cheol Kim, Hyun Dal Park
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Abstract
Disclosed is a plasma nitriding surface treatment method for a gray cast iron part. In the plasma nitriding surface treatment method, a nitride layer is formed on a surface of the gray cast iron part by a selective ion nitriding treatment. The plasma nitriding surface treatment method is carried out such that the surface of the gray cast iron part is prevented from being deformed, and a reduction of the frictional coefficient of the part is prevented.
Claims7
A plasma nitriding surface treatment method for a gray cast iron part, comprising:
- forming a nitride layer on a surface of the gray cast iron part by a selective ion nitriding treatment, and
- forming an oxide layer on the surface of the gray cast iron part after forming the nitride layer, wherein the oxide layer is formed using a salt bath oxidation process or vapor to inhibit formation of a porous layer and facilitate infiltration of nitrogen atoms,
- wherein the surface of the gray cast iron part is prevented from being deformed, and a frictional coefficient of the gray cast iron part is maintained.
The plasma nitriding surface treatment method of claim wherein the oxide layer is (Fe3O4).
Dependencies are inferred from the claim text.