Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1994-09-07
1996-02-20
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428546, 428548, 428551, 428552, B22F 706
Patent
active
054927714
ABSTRACT:
An improved method of making a monolayer abrasive tool using a relatively low melting point, soft filler metal alloy braze which possesses sufficiently high yield strength combined with a relatively high ductility and low elastic modulus to produce an exceptional bond between a monolayer of superabrasive particles and the tool substrate. The steps of the brazing process include applying a layer of the filler metal alloy including a an active metal in either pre-alloyed or as a mixture with the metal alloy and a monolayer of superabrasive crystals over the filler metal layer. This assembly is heated in a mon-oxidizing atmosphere such as a vacuum to melt the alloy and braze bond the superabrasive particles to the tool substrate. The alloy bond formed possess the properties of a ductility of at least 20 percent elongation, an elastic modulus of less than 15.times.10.sup.6 or less, and a yield strength preferably at least about 45,000 to 50,000 psi. A copper/silver based alloy including about 8 to 15 weight percent indium and 1 to 4 weight percent titanium is used in a preferred embodiment of the method disclosed.
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George Kosta L.
Lowder James T.
Wielonski Roy F.
Abrasive Technology, Inc.
Greaves John N.
Kremblas, Jr. Francis T.
Walsh Donald P.
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