Method of strengthening metal parts through ausizing
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United States of America Patent
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May 21, 2013
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N/A
app pub date -
Jun 18, 2007
filing date -
Jun 20, 2006
priority date (Note) -
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Abstract
The subject invention discloses a process for strengthening and obtaining the desired dimensions for a metal part comprising: (1) heating at least a portion of a preformed metal part to a temperature above about 1300° F. to transform the metal in at least said portion of the part to an austenitic state to produce an austenitized preformed metal part, (2) quenching the austenitized preformed metal part to a temperature of 300° F. to 650° F. to put the metal in the preformed part in a metastable austenitic state, (3) coining, drawing or extruding the preformed metal part while said metal of said preformed metal part is maintained in the metastable austenitic state at a temperature of 300° F. to 650° F., and (4) quenching the coined, drawn, or extruded metal part at a temperature which allows for the rapid transformation from austenite to martensite.
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