Method of densifying powder metal preforms

Details Method of densifying powder metal preforms Method of densifying powder metal preforms

1999-02-17

2000-01-25

Mai, Ngoclan

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 26, 419 5, 72479, B22F 324

Patent

active

060174897

ABSTRACT:
A method of densifying the wall of an opening in a powder metal preform includes forcibly extending a densification tool through the opening having a plurality of radially enlarged forming portions arranged in axially spaced succession from smallest to largest which act to enlarge and densify the preform material and impart beneficial compressive stresses. The space between successive forming portions enables the preform material to recover elastically between adjacent forming sections to maximize induced compressive stresses.

REFERENCES:
patent: 175807 (1876-04-01), Wistar
patent: 3615382 (1971-10-01), Manilla et al.
patent: 3951561 (1976-04-01), Speakman
patent: 4059879 (1977-11-01), Chmura et al.
patent: 4231247 (1980-11-01), Haydon
patent: 4398407 (1983-08-01), DeFay, Jr.
patent: 4573841 (1986-03-01), Petkov et al.
patent: 4651926 (1987-03-01), Sasao et al.
patent: 4727744 (1988-03-01), Ferree
patent: 4771627 (1988-09-01), Speakman
patent: 4940565 (1990-07-01), Muller
patent: 5069869 (1991-12-01), Nicholas et al.
patent: 5233738 (1993-08-01), Finkbeiner et al.
patent: 5503506 (1996-04-01), Yuan
patent: 5685190 (1997-11-01), Yamamoto et al.

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