Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1984-05-18
1985-11-19
Miller, Edward A.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428569, 419 27, 419 23, 419 38, 419 37, B22F 300, B22F 100
Patent
active
045542180
ABSTRACT:
A precision molded article, such as a die cavity, is made by combining granules of a first metal or alloy and a second metal or alloy, the second metal or alloy having a homogeneous appearance at some temperature below its melting point, and a higher Rockwell Hardness than the first metal or alloy, mixing the granules with a heat fugitive organic binder, molding the granule-binder mixture into a green molded preform, thermally degrading and removing essentially all the binder to form a skeletal preform, and infiltrating the preform with a third metal or alloy which will wet the second metal or alloy and has a lower Rockwell Hardness than the second metal or alloy, thereby forming a molded article having granules of first metal or alloy the majority of which are fully enveloped within a single skeleton of the second metal or alloy, the skeleton of second metal or alloy being surrounded by layers or matrices of softer metals.
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Dillon Kenneth R.
Gardner Richard N.
Brookes A. E.
Cleveland David R.
Miller Edward A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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