Brightening chemical polishing solution for hardened steel artic

Details Brightening chemical polishing solution for hardened steel artic Brightening chemical polishing solution for hardened steel artic

1991-11-27

1993-10-26

Hearn, Brian E.

Compositions

Etching or brightening compositions

156664, 252 793, 252 794, H01L 2100

Patent

active

052563162

ABSTRACT:
A brightening chemical polishing solution for a hardened steel article (e.g., a carburized and quenched gear) comprises hydrofluoric acid having a molar concentration of from 0.2 to 2 mol/l, hydrogen peroxide having a molar concentration of from 0.4 to 4 mol/l, and water, a molar ratio of the hydrofluoric acid to the hydrogen peroxide being from 1:1.5 to 1:2.8. The steel article is quench hardened and is chemically polished in the solution. A shot-peening is additionally performed, prior to the polishing.

REFERENCES:
patent: 3992235 (1976-11-01), Gabarini
patent: 4459216 (1984-07-01), Nakazato et al.
Patent Abstracts of Japan, vol. 12, No. 57, (M-670), Feb. 20, 1988, & JP-A-62-203 766, Sep. 8, 1987, K. Ogawa, et al. "Method of Treating Surface of Cemented and Quenched Layer".
Patent Abstracts of Japan, vol. 11, No. 24, (C-399)(2471), Jan. 23, 1987, & JP-A-61 199 084, Sep. 3, 1986, S. Nakada, et al., "Manufacture of Cr Stainless Steel Sheet".

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