Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making porous product
Patent
1987-10-07
1988-08-23
Lechert, Jr., Stephen J.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Making porous product
264 63, 264 66, 264125, 419 36, 419 37, 419 54, B22F 100
Patent
active
047659505
ABSTRACT:
Provided is a method of manufacturing sintered parts from particulate material, e.g metal or ceramic parts. The method comprises mixing together predetermined amounts of powdered particulate material and a binder, which mixture is then molded under heat and pressure. The binder comprises at least a lower melting point component and a higher melting point component, with the lower melting point component remaining in a liquid state, becoming semi-solid or relatively soft upon cooling to ambient temperatures. Prior to sintering, the lower melting point component of the binder is selectively dissolved in a liquid solvent, and the higher melting point component is removed upon heating at temperatures below the sintering temperature. The result is a process which eliminates or prevents the formation of oxides, substantially reduces the time required for debinding and sintering, and essentially eliminates cracking in the finished part.
REFERENCES:
patent: 3926671 (1975-12-01), Gutjahr et al.
patent: 3933652 (1976-01-01), Weichselbaum et al.
patent: 4225345 (1980-09-01), Adee et al.
patent: 4483905 (1984-11-01), Engstrom
patent: 4569821 (1986-02-01), Dupernay et al.
patent: 4604259 (1986-08-01), Whitman
patent: 4664883 (1987-05-01), Melody et al.
Lechert Jr. Stephen J.
Risi Industries, Inc.
LandOfFree
Process for fabricating parts from particulate material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for fabricating parts from particulate material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for fabricating parts from particulate material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-834802