Methods and apparatus for firing extruded metals

Details Methods and apparatus for firing extruded metals Methods and apparatus for firing extruded metals

1991-07-22

1993-07-06

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Special medium during sintering

419 38, 419 57, B22F 310

Patent

active

052251551

ABSTRACT:
Methods and apparatus for protecting extruded metal powder green bodies (34) during firing are provided. In certain embodiments, one or more green bodies (34) are housed in a non-gas tight chamber (13) located in the hot zone (24) of a cold-wall vacuum/atmosphere furnace (10). Furnace gas, e.g., hydrogen, is supplied to the interior of the chamber (13). The resulting one-way flow out of the chamber (13) protects the green bodies (34) from the backflow of burn-out products, as well as from contaminants arising from the walls and internal components of the furnace (10). In other embodiments, green bodies (34) are housed in individual non-gas tight containers (36). The containers (36) minimize the amount of furnace gas which comes into contact with the green bodies (34) during sintering and thus minimize the level of exposure of the green bodies (34) to oxidative impurities in the furnace gas. When composed of the same material as the green bodies, the containers (36) also perform a getter function.

REFERENCES:
patent: 5064609 (1991-11-01), Harada et al.
"Powder Metallurgy Equipment Manual", PMEA, 1977, pp. 77-84, 88-104.

Affiliated with

Also associated with

Rating

Methods and apparatus for firing extruded metals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for firing extruded metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for firing extruded metals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1687995