Process for joining powder metallurgy objects in the green (or brown) state
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United States of America Patent
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Mar 7, 2000
Grant Date -
N/A
app pub date -
Nov 14, 1997
filing date -
Nov 15, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
In a process for producing powder metallurgy objects containing two or more individually formed pieces, the individual formed pieces or powder compacts which are comprised of powder and a binder are joined together. A polymer compatible with the binder is sandwiched between two such powder compacts. A lamination joint is formed. The polymer is then softened, and a resultant aggregate body is thermally processed to remove the binder and polymer. The resulting object has no residual interface between the original individually formed pieces. There is no discernable boundary at the lamination joint. The final part is homogeneous and uniform with no foreign material or structural imperfections at the joint.
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