Surface process involving isotropic superfinishing

Details Surface process involving isotropic superfinishing Surface process involving isotropic superfinishing

2005-04-19

2005-04-19

Koehler, Robert R. (Department: 1775)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S610000, C428S621000, C428S624000, C428S627000, C428S650000, C428S655000, C428S686000, C428S687000, C428S908800, C428S938000, C148S516000, C148S537000, C148S902000, C427S248100, C427S299000, C427S457000, C451S901000

Reexamination Certificate

active

06881498

ABSTRACT:
A surface processing method and power transmission component includes refining a surface region of a metal from a first roughness to a second roughness less than the first roughness. A solid lubricous coating or a hard coating is then deposited on the surface region. The metal has a surface hardness above 50 Rcto reduce the risk that the metal will deform under the coating and leave the coating unsupported. The surface region of the metal may be transformed into a nitrogen-containing compound or solid solution surface region before the surface refining step and deposition of the coating.

REFERENCES:
patent: 6656293 (2003-12-01), Black et al.
patent: WO 02053793 (2002-07-01), None
V. Joshi, K. Suklarni, R.Shivpuri, R.S. Bhattacharya, S.J. Dikshit, D. Bhat; Dissolution and soldering behavior of nitrided hot working steel with multilayer LAFAD PVD coatings, Surface and Coatings Technology 146-147 (2001) 338-343, no month given.
V.H Baggio-Scheid, G. De Vasconcelos, M.A.S. Oliveira, B.C. Ferreira; “Duplex surface treatment of chromium pack diffusion and plasma nitriding of mild steel”; Surface and Coatings Technology 163-164 (2003) 3113-317, no month given.
J.C.A. Batista, C. Godoy, A. Matthews, “Impact testing of duplex and non-duplex (Ti,A1)N and Cr-N PVD coatings”, Surface and Coatings Technology 163-164 (2003) 353-361, no month given.
N. Dingremont, E. Bergmann, M. Hans, P. Colllignon, “Comparison of the corrosion resistance of different steel grades nitrided, coated and duplex treated”, Surface and Coatings Technology 76-77 (1995) 218-224, no month given.

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