| 摘要 |
<p>A phosphorus-iron powder is disclosed for use in the pressing and sintering of soft magnetic parts. This powder comprises a substantially phosphorus free iron powder blended with a sufficient quantity offerrophosphorus powder having an average particle size of at least 10 micron and a phosphorus content of from 18 to 30% by weight, to arrive at a phosphorus content for the mixture in a range of from 0.40 to 1.25% by weight. By pressing the blended mixture to a green density of at least 6.0 grams per cubic centimeter, and sintering the pressed mixture in a nonoxidizing atmosphere at a temperature of at least 1038°C (1900°F), the part linear shrinkage during sintering is less than 2%.</p> |
