Process for producing sintered-iron molded parts with pore-free

Details Process for producing sintered-iron molded parts with pore-free Process for producing sintered-iron molded parts with pore-free

1993-03-26

1995-09-26

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 28, 419 49, B22F 326, B22F 324

Patent

active

054532426

ABSTRACT:
A process for producing from iron materials a sintered molded part which is pore-free in individual zones or boundary zones but porous in the other zones. The process is based on a molded part brought to a residual porosity of about 10% by volume by conventional powder pressing and sintering processes. By additional process steps such as zonal introduction of additional materials or local mechanical recompacting, certain zones or local areas are brought to a residual porosity of 5% by volume or less; at the same time, a closed pore structure is produced in these zones. Under these preconditions, in a final HIP or sintering HIP process step the sintered molded part can be brought to 100% material density in the pretreated zones so that they substantially completely free from pores. The major advantages include local improvement in material properties and calibratability of the finished sintered molded part.

REFERENCES:
patent: 2561579 (1951-07-01), Lenel
patent: 4123265 (1978-10-01), Takahashi et al.
patent: 4470953 (1984-09-01), Bruce
patent: 4606768 (1986-08-01), Svilar et al.
patent: 4710223 (1987-12-01), Matejczyk
patent: 4769071 (1988-09-01), Klar et al.
patent: 4810289 (1989-03-01), Hoyer et al.
patent: 4976778 (1990-12-01), Berry et al.
patent: 5032353 (1991-07-01), Smarsly et al.
patent: 5126102 (1992-06-01), Takahashi et al.
patent: 5174952 (1992-12-01), Jongenburger et al.
patent: 5330702 (1994-07-01), Kippenberg et al.
English-language translation of Abstract of German Patent No. DE 2258310.
English-language equivalent of Abstract of German Patent No. DE 2310536.
English-language translation of Abstract of German Patent No. DE 3007008.
English-language translation of Abstract of German Patent No. DE 2050276.
English-language equivalent of Abstract of German Patent No. DE 2641899.

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