Iron based powder mixture for powder metallurgy

Details Iron based powder mixture for powder metallurgy Iron based powder mixture for powder metallurgy

1998-02-24

1999-08-17

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

75231, 75243, 75244, 75246, B22F 100

Patent

active

059388145

ABSTRACT:
An iron based powder mixture for powder metallurgy is provided which can produce a sintered material having by far higher machinability and sliding properties than conventional sintered materials, and also a sintered material containing alloy elements but having adaptability to sizing even after sintering; it comprises an atomized iron powder comprising S in a content of 0.03 to 0.30 wt %, Mn in a content of 0.05 to 0.40 wt % and the balance Fe and incidental impurities, to which is added one or more than one B-containing compound powder selected from boron nitride (BN), boric acid (H.sub.3 BO.sub.3), boron oxide (B.sub.2 O.sub.3) and the like in an amount of 0.001 to 0.3 wt % expressed as B, and incorporated with an MnS powder in an amount of 0.05 to 1.0 wt %, optionally alloyed partially with or prealloyed with Ni, Mo and Cu.

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patent: 5462573 (1995-10-01), Baker et al.
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