Method for producing powder metal gears
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United States of America Patent
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Oct 7, 2003
Grant Date -
Feb 20, 2003
app pub date -
Aug 16, 2001
filing date -
Aug 16, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method of producing a gear from a metallurgical powder includes molding at least a portion of the powder to provide a gear preform. The gear preform is sintered and hot formed, and subsequently may be carburized. The gear preform is resintered and cooled at a cooling rate suitable to provide a bainitic microstructure in at least a surface region of the preform. The gear teeth of the preform may be shaved to, for example, adjust dimensions, and enhance dimensional uniformity.
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