DE903694C - The use of powder produced from iron, aluminum and nickel-containing magnetic steel scrap for the manufacture of sintered magnets - Google Patents
The use of powder produced from iron, aluminum and nickel-containing magnetic steel scrap for the manufacture of sintered magnetsInfo
- Publication number
- DE903694C DE903694C DEB9592D DEB0009592D DE903694C DE 903694 C DE903694 C DE 903694C DE B9592 D DEB9592 D DE B9592D DE B0009592 D DEB0009592 D DE B0009592D DE 903694 C DE903694 C DE 903694C
- Authority
- DE
- Germany
- Prior art keywords
- iron
- aluminum
- nickel
- manufacture
- sintered magnets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Description
Die Verwendung von aus eisen-, aluminium- und nickelhaltigem Magnetstahlschrott erzeugtem Pulver zum Herstellen von Sintermagneten Nach Ansicht der Fachwelt, vgl. z. B. »Stahl und Eisen« Jahrg.61 (19q.1), S. iio6 rechts unten, können, selbst wenn höchste Preßdrücke angewendet werden, aus einem aus dem Schrott von Eisen-, Aluminium- und Nickeldauermagnetstahl gewonnenen Pulver keine Preßkörper hergestellt werden, die ihre Form auch nur einigermaßen behalten. Wenn eine solche Formbeständigkeit nicht erreicht wird, ist man aber nicht imstande, Sintermagnete aus Schrot aus solchen Stählen ohne Beimischen fremder Stoffe bzw. Metalle herzustellen.The use of iron, aluminum and nickel-containing magnetic steel scrap produced powder for the production of sintered magnets In the opinion of experts, cf. z. B. "Stahl und Eisen", year 61 (19q.1), p. Iio6 bottom right, can, even if highest compression pressures are used from one of the scrap of iron, aluminum and nickel permanent magnet steel powder no compacts are made, that keep their shape even to some extent. When such dimensional stability is not achieved, but one is not able to sinter magnets from scrap from such Manufacture steels without adding foreign substances or metals.
Es wurde vom Erfinder erkannt, daß der Mißerfolg der bisherigen Versuche auf der Verwendung eines Pulvers beruhte, das durch für diesen Zweck nicht geeignetes Zerkleinern des Schrotts entstanden war. Die Erfindung schafft hier Abhilfe. Sie besteht darin, daß zum Herstellen von Sintermagneten aus eisen-, aluminium- und nickelhaltigem Magnetstahlschrott erzeugtes Pulver verwendet wird, das durch ein Spaltflächen vermeidendes Zerkleinerungsverfahren, z. B. durch Zerteilen aus dem flüssigen Zustand, erzeugt ist. Unter Spaltflächen werden dabei, wie üblich, Spaltflächen der einzelnen Metallkristallite im kristallographischen Sinn verstanden.It was recognized by the inventor that the failure of previous attempts relied on the use of a powder which was not suitable for this purpose Crushing the scrap was created. The invention provides a remedy here. she is that for the manufacture of sintered magnets from iron, aluminum and Nickel-containing magnetic steel scrap is used that is produced by a Comminution process that avoids cleavage surfaces, e.g. B. by dividing from the liquid state, is generated. As usual, cleavage surfaces are used as cleavage surfaces of the individual metal crystallites understood in the crystallographic sense.
Der überraschende Erfolg des Verfahrens nach der Erfindung hängt vermutlich damit zusammen, daß bei der Gewinnung des Pulvers aus dem Schrott durch das übliche mechanische Zermahlen gerade im Falle der für die Eisen-, Aluminium-und Nickeldauermagnete gebrauchten Legierungen bevorzugt Spaltflächen enthaltende Bruchflächen entstehen, was vergleichsweise glatte, für das Pressen erfahrungsgemäß ungeeignete Teilchen des Sinterpulvers ergibt, während es gerade darauf ankommt, sich gut untereinander verhakende Teilchen zu erhalten.The surprising success of the method according to the invention presumably depends together with the fact that in the recovery of the powder from the scrap metal by the usual mechanical grinding especially in the case of for the iron, aluminum and Nickel permanent magnets use alloys, preferably fracture surfaces containing cleavage surfaces what is produced is comparatively smooth, which experience has shown to be unsuitable for pressing Particles of the sintered powder, while it is important, get along well with each other to get entangled particles.
Ein Verfahren, um ein im Sinn der Erfindung brauchbares Schrottpulver zu gewinnen, besteht z. B. darin, daß in an sich bekannter Weise der Schrott eingeschmolzen und dann das flüssige Metall in feinste Teilchen zerstäubt wird.A method of producing a scrap powder which can be used in the context of the invention to win consists z. B. is that the scrap melted in a known manner and then the liquid metal is atomized into very fine particles.
Bei der Gewinnungsart des Pulvers aus dem Schrott haben sich bei den zur Erfindung führenden Versuchen einwandfreie Sintermagnete ergeben. Bei einer Untersuchung des Einflusses der Korngröße dieses auf dem flüssigen Wege gewonnenen Schrottpulvers ergaben sich bei Unterschreitung der Korngröße von o,oS mm besonders günstige magnetische Werte des Sintermagneten. Bei einer Korngröße von 0,07 mm erreichte die Koerzitivkraft 400 ürsted und die Remanenz 52oo Gauß.In the tests leading to the invention, the methods of obtaining the powder from the scrap have shown that the sintered magnets are flawless. When examining the influence of the grain size of this scrap powder obtained by liquid means, particularly favorable magnetic values of the sintered magnet were found when the grain size fell below 0.05 mm. With a grain size of 0.07 mm, the coercive force reached 400 ürsted and the remanence 52oo Gauss.
Noch vorteilhaftere Ergebnisse sind zu erwarten, wenn verschiedene Korngrößen verwendet werden und der Anteil dieser Korngrößen nach den auf verschiedenen Gebieten der Mischung von körnigen Stoffen gültigen Regeln der Erzielung des günstigsten Füllgrades ausgewählt wird.Even more beneficial results are to be expected when different Grain sizes are used and the proportion of these grain sizes according to the different Areas of the mixture of granular substances apply rules of obtaining the most favorable Filling level is selected.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB9592D DE903694C (en) | 1941-12-25 | 1941-12-25 | The use of powder produced from iron, aluminum and nickel-containing magnetic steel scrap for the manufacture of sintered magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB9592D DE903694C (en) | 1941-12-25 | 1941-12-25 | The use of powder produced from iron, aluminum and nickel-containing magnetic steel scrap for the manufacture of sintered magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE903694C true DE903694C (en) | 1954-02-08 |
Family
ID=6956446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB9592D Expired DE903694C (en) | 1941-12-25 | 1941-12-25 | The use of powder produced from iron, aluminum and nickel-containing magnetic steel scrap for the manufacture of sintered magnets |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE903694C (en) |
-
1941
- 1941-12-25 DE DEB9592D patent/DE903694C/en not_active Expired
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