Powder metal materials and parts and methods of making the same

Details Powder metal materials and parts and methods of making the same Powder metal materials and parts and methods of making the same

2004-01-29

2008-08-26

Wyszomierski, George (Department: 1793)

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

Reexamination Certificate

active

07416696

ABSTRACT:
Embodiments of the present invention relate to methods of forming powder metals materials and parts. More specifically, certain embodiments of the present invention relate to methods of forming powder metals materials and parts by densifying at least a portion of a surface of the materials and/or parts after sintering and prior to densifying one or more core regions of the materials and/or parts. Other embodiment provide powder metal parts, such as gears and sprockets, having surface regions that are uniformly densified to full density to depth ranging from 0.001 inches to 0.040 inches, and core regions that can have at least 92 percent theoretical density and further can have essentially full density, or full density. Still other embodiments relate to brazed, welded, plated and gas-tight powder metal parts and components that can be made in accordance with the various non-limiting methods disclosed herein.

REFERENCES:
patent: 3874049 (1975-04-01), Ferguson
patent: 4059879 (1977-11-01), Chmura et al.
patent: 4121927 (1978-10-01), Lohman et al.
patent: 4277544 (1981-07-01), Pietrocini
patent: 4708912 (1987-11-01), Huppmann
patent: 5009842 (1991-04-01), Hendrickson et al.
patent: 5512236 (1996-04-01), Jones et al.
patent: 5540883 (1996-07-01), Jones et al.
patent: 5613180 (1997-03-01), Kosco
patent: 5711187 (1998-01-01), Cole et al.
patent: 5729822 (1998-03-01), Shivanath et al.
patent: 5972132 (1999-10-01), Cadle
patent: 6013225 (2000-01-01), Cadle et al.
patent: 6017489 (2000-01-01), Woolf et al.
patent: 6171546 (2001-01-01), Mars et al.
patent: 6338747 (2002-01-01), Kosco
patent: 6473964 (2002-11-01), Anderson et al.
patent: 6485540 (2002-11-01), Kosco
patent: 6592809 (2003-07-01), Anderson et al.
patent: 6630101 (2003-10-01), Anderson et al.
patent: 2003/0155041 (2003-08-01), Bengtsson et al.
patent: 1532641 (1978-11-01), None
patent: 2250227 (1992-06-01), None
patent: 61-261402 (1986-11-01), None
patent: 61-264101 (1986-11-01), None
patent: 02-138554 (1990-05-01), None
patent: 07-100629 (1995-04-01), None
patent: 435026 (1984-09-01), None
patent: WO-92/05897 (1992-04-01), None
patent: WO-94/14557 (1994-07-01), None
Mogul, J. and Diepart, C.P, “Process Controls the Key to Reliability of Shot Peening,”Industrial Heating, Nov. 1995 pp. 34-35.

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