Iron-base sintered alloy material for valve seat insert and method for manufacturing the same
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United States of America Patent
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Oct 31, 2017
Grant Date -
Oct 1, 2015
app pub date -
Mar 31, 2015
filing date -
Mar 31, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An iron-base sintered alloy material includes a matrix phase, Co base inter-metallic compound particles having hardness of 600 to 1200 HV, carbide-type particles having hardness of 400 to 700 HV, and optionally solid-lubricant particles, the particles being dispersed in the matrix phase. A matrix part including the matrix phase and the two kinds of hard-particles contains 0.3 to 1.5% by mass of C, and 10 to 50% by mass of one or more kinds selected from Si, Mo, Cr, Ni, Co, Mn, S, N, V, Ca, F, Mg, and O, the balance being Fe and unavoidable impurities. By dispersing, in the matrix phase, the Co base inter-metallic compound particles having high hardness, and the carbide-type particles having low hardness and low aggressiveness to mated material and increasing mechanical strength, wear-resistance can be improved with low aggressiveness to mated material and high radial crushing strength (350 MPa or more).
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Patent Citation Ranking
- 1 Citation Count
- B23P Class
- 35.68 % this patent is cited more than
- 8 Age
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