Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1980-05-12
1982-04-27
Hunt, Brooks H.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428567, 428545, 75203, 75204, 75208R, B22F 300, C22C 105
Patent
active
043271561
ABSTRACT:
A precision molded article, such as a die cavity, is made by combining granules of a refractory and granules of a first metal or alloy which has a homogeneous crystalline appearance at a temperature below its melting point and has a lower Rockwell Hardness than the refractory, 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 second metal or alloy which will wet the first metal or alloy and has a lower Rockwell Hardness than the first metal or alloy, thereby forming a molded article having refractory granules fully enveloped within a single skeleton of the first metal or alloy, the refractory granules and skeleton of first metal being surrounded by layers or matrices of softer metals.
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Dillon Kenneth R.
Gardner Richard N.
Alexander Cruzan
Cleveland David R.
Hunt Brooks H.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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