MANUFACTURING METHOD OF CORROSION RESISTANT SURFACE OF NITRIDED OR CARBONITRIDED STEEL MEMBER

• Main Author: BAUDIS ULRICH DR
• Format: Patent
• Language: English
• Published: 01.05.2014
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide a rational method of manufacturing a nitrided or carbonitrided member having a corrosion resistant surface with small roughness.SOLUTION: The manufacturing method comprises the following method steps: oxidation of the surfaces of nitrided or carbonitrided members in a first oxidation step; at least one second oxidation of the member surfaces in an immediately subsequent oxidation step; and polishing of the member surfaces in a final method step, directly after the final oxidation.