Iron base sintered alloy having highly densified and hardened surface, and producing method thereof
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United States of America Patent
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Issued Date -
Apr 12, 2007
app pub date -
Jun 24, 2004
filing date -
Jun 27, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An iron base sintered alloy having highly densified and hardened surface and a producing method thereof are provided. The iron base sintered alloy includes an iron base sintered alloy surface layer portion having a thickness in a range of 1 .mu.m to 2 mm from a surface of the iron base sintered alloy and containing K and/or Na in an average concentration of 0.0001 to 1 mass %, or having an average concentration of P higher than a concentration of P in an iron base sintered alloy inner portion located inside the iron base sintered alloy surface layer portion and containing K and/or Na in an average concentration of 0.0001 to 1 mass %.
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