Method for preparing a composite metal sintered article
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United States of America Patent
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-
Apr 14, 1981
Grant Date -
N/A
app pub date -
Dec 29, 1978
filing date -
Feb 9, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite metal sintered article combining a metal shell which has been electroformed and/or electroless plated and/or vapor deposited, positioned inside or outside of a metal sintered compact. A method of making the composite metal sintered article using both a powder metallurgy process and a surface treating process. This composite metal sintered article has excellent surface properties and high dimensional accuracy and is favorably used for many kinds of forming molds, dies and structural members, especially for press molds in making glassware.
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