发明名称 |
PHOSPHATBESCHICHTETES EISENPULVER UND VERFAHREN ZU DESSEN HERSTELLUNG |
摘要 |
The invention concerns a novel low oxygen powder comprising particles of a base powder consisting of essentially pure iron having an insulating oxygen- and phosphorus-containing barrier. The oxygen content of the new powder is at most 0.2% by weight higher than the oxygen content of the base powder, and the ratio O:P is between 30 and 1, preferably between 15 and 2 and most preferably between 10 and 3 as measured by the ESCA method. The invention also concerns a new method of preparing an iron-based powder comprising the steps of preparing a base powder consisting of a water atomized iron powder or a sponge iron powder, subjecting the mixture to treatment with a solution of phosphoric acid in an organic solvent and drying the obtained mixture, whereby the solution of phosphoric acid is sprayed on the base powder while being mixed. |
申请公布号 |
DE69724589(D1) |
申请公布日期 |
2003.10.09 |
申请号 |
DE1997624589 |
申请日期 |
1997.02.19 |
申请人 |
HOEGANAES AB, HOEGANAES |
发明人 |
JANSSON, PATRICIA;LARSSON, LARS-AKE |
分类号 |
B22F1/02;B22F;B22F1/00;B22F9/16;C23C22/03;H01F1/20;H01F1/24;(IPC1-7):B22F1/02 |
主分类号 |
B22F1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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