COMPOSITE KNIFE BLADE
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United States of America Patent
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Issued Date -
Apr 4, 2013
app pub date -
Nov 27, 2012
filing date -
Apr 12, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A composite knife blade includes a cutting-edge piece of a first alloy, a back piece of a second alloy different from the first alloy, the cutting-edge piece and the back piece are brazed together at a serpentine joint. The cutting-edge piece has a high Rockwell hardness value, as compared to a hardness of the back piece. A method of manufacture of the knife blade includes fine blanking the back piece of from a sheet of the second alloy, laser cutting the cutting-edge piece from a sheet of the first alloy, and brazing the first piece to the second piece to form a composite blade. The composite blade is then cooled from the brazing temperature to an austenizing temperature of the cutting-edge piece, and quenched, to harden the cutting-edge piece.
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