Method for producing cast iron gear

Details Method for producing cast iron gear Method for producing cast iron gear

1996-03-18

1997-11-25

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148615, 148211, 148212, 148230, C21D 800, C21D 932, C23C 826

Patent

active

056907567

ABSTRACT:
A method for producing cast iron gears includes the steps of heating a blank composed of cast iron and having a teeth forming part to such a temperature that at least the teeth forming part is at least austenitized, and hot rolling the teeth forming part of the blank by pressing projecting teeth of a rolling machine against the teeth forming part which is in a hot state and within an austenitized range, while cooling the blank, thereby generating a teeth part in the teeth forming part of the blank. Hot rolling with a low plastic deformation resistance prevents lowering of strength due to the exposure of graphite particles of cast iron and occurrence of quenching cracks and rolling cracks, and improves gear accuracy.

REFERENCES:
patent: 5082507 (1992-01-01), Curry
patent: 5221513 (1993-06-01), Amateau et al.
patent: 5516376 (1996-05-01), Tsukamoto et al.
Patent Abstracts of Japan, vol. 17 No. 426 (C-1094), Aug. 9, 1993.
Patent Abstracts of Japan, vol. 12, No. 164 (M-698), May 18, 1988.
Patent Abstracts of Japan, vol. 9, No. 331 (C-321), Dec. 25, 1985.

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