Claims
- 1. A method of hot consolidating powder in a heat container mass which is substantially fully dense and incompressible with at least a portion capable of plastic flow during pressing and having interior walls forming a closed cavity of a predetermined shape and volume for receiving powder with the interior walls being movable to reduce the volume of the cavity for compacting powder into an article comprising the steps of: disposing a shaping means in the cavity for defining a void in the article as the powder is compacted thereagainst, applying a force to the container to move the interior walls relative to one another to reduce the volume of the cavity while compacting the powder with a force response means between the shaping means and at least a portion of the interior walls of the cavity to prevent movement of the shaping means relative to that portion of the interior walls as the cavity is reduced in volume until the powder thereagainst reaches a predetermined degree of compaction whereupon movement of the shaping means relative to that portion of the interior walls is allowed as the cavity is further reduced in volume to complete the compaction of the powder, and applying a force to the heated container until the mass of the container becomes substantially monolithic so that further application of the force causes further compaction as a result of fluid-like behaviour of the mass of the container due to the plastic flow of the mass of the container whereby the further compaction is isostatic.
- 2. A method as set forth in claim 1 further defined as applying the force to the container by applying gas pressure in a gas autoclave.
- 3. A method as set forth in claim 1 further defined as applying the force to the container by pressing the container between the dies of a press while restraining the container to cause the plastic flow of the container mass.
Parent Case Info
This application is a continuation of application Ser. No. 152,339, now abandoned, filed May 22, 1980.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
Hirschhorn, Introduction to Powder Metallurgy, (1969), APMI, pp. 98-107. |
Continuations (1)
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Number |
Date |
Country |
Parent |
152339 |
May 1980 |
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