Gears

Details Gears Gears

1996-05-24

1998-03-17

Mai, Ngoclan

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428552, 419 28, 419 29, 148225, 148206, B22F 508

Patent

active

057298220

ABSTRACT:
A powder metal gear wheel having a core density of at least 7.3 g/cc, and in one embodiment 7.4 to 7.6 g/cc and a hardened carburized surface. A method of manufacturing transmission gears comprises, sintering a powder metal blank to produce a core density of between 7.4 to 7.6 g/cc, rolling the surface of the gear blank to densify the surface, and then heating the rolled sintered part and carburizing in a vacuum furnace.

REFERENCES:
patent: 3661656 (1972-05-01), Jarleborg
patent: 4006016 (1977-02-01), Zambrow et al.
patent: 4165243 (1979-08-01), Sarnes et al.
patent: 4708912 (1987-11-01), Huppmann
patent: 5201966 (1993-04-01), Hirai
patent: 5308702 (1994-05-01), Furukimi et al.
patent: 5476632 (1995-12-01), Shivanath

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