Gear wheels rolled from powder metal blanks and method of manufacture
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United States of America Patent
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Jan 27, 1998
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N/A
app pub date -
Jan 3, 1995
filing date -
Oct 8, 1990
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Abstract
A gear wheel is formed from a pressed and sintered powder metal blank in which the metal powder comprises an admixture of iron powder and at least one alloying addition and the gear wheel is surface hardened by densifying at least the tooth root and flank regions to establish densification in the range of 90 to 100 percent of full theoretical density to a depth of at least 380 and up to about 1,000 microns.
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