DE881109C - Process for producing an alloy powder for mass cores - Google Patents

Process for producing an alloy powder for mass cores

Info

Publication number
DE881109C
DE881109C DES24029A DES0024029A DE881109C DE 881109 C DE881109 C DE 881109C DE S24029 A DES24029 A DE S24029A DE S0024029 A DES0024029 A DE S0024029A DE 881109 C DE881109 C DE 881109C
Authority
DE
Germany
Prior art keywords
alloy powder
metal oxides
mass
producing
metal
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
Application number
DES24029A
Other languages
German (de)
Inventor
Karl Kesselring
Friedrich Meyer
Gustav Roespel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DES24029A priority Critical patent/DE881109C/en
Application granted granted Critical
Publication of DE881109C publication Critical patent/DE881109C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/16Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Description

Verfahren zur Herstellung eines Legierungspulvers für Massekerne Die Erfindung hat ein Verfahren zur Herstellung eines Legierungspulvers für Massekerne aus Metalloxyden oder anderen Metallverbindungen, welche durch eine Glühbehandlung leicht in Metalloxyde zerfallen, zum Gegenstand. Dieses Verfahren ist dadurch gekennzeichnet, daß ein Gemisch aus Metalloxyden und/oder solchen Metallverbindungen, gegebenenfalls unter Zusatz von Flußmitteln, in einer nicht reduzierenden Atmosphäre gesintert oder zusammengeschmolzen und nach anschließender Zerkleinerung zu einer für Massekerne geeigneten Feinheit zu Legierungspulver reduziert wird. Durch das Sintern bzw. Zusammenschmelzen der Metalloxyde oder der aus Metallverbindungen gewonnenen Metalloxyde erhält man eine homogene spröde Masse, die sich leicht zu feinen Teilchen zerkleinern läßt, worauf man durch die anschließende Reduktion ein Legierungspulver in der erforderlichen Feinheit gewinnt, in dem die einzelnen Metallkomponenten gleichmäßig verteilt sind. Als Metallverbindungen können z. B. Carbonate, Hvdroxyde, Oxalate der Metalle Eisen, Nickel, Molybdän, Chrom, Kupfer, Vanadium, Kobalt, Aluminium, Silicium, Mangan od. dgl. in Anwendung kommen. Bei der Sinterung von Metallverbindungen geht man so vor, daß man zunächst eine Temperatur wählt, bei der die Metallverbindungen in reine Oxyde zerfallen, aber noch keine Diffusion zwischen den flüchtig werdenden Bestandteilen und den entstehenden Oxyden stattfindet, damit die flüchtig werdenden Bestandteile abdampfen können. Hierauf wird die Temperatur auf etwa iooo bis 130o° C gesteigert, um dem erhaltenen Metalloxyd eine möglichst weitgehende Mischkristallbildung zu ermöglichen. Man kann die Temperatur auch so weit steigern, daß ein Zusammenschmelzen eintritt. Im-Falle der Sinterung können gegebenenfalls Flußmittel zugesetzt werden, und zwar sind hierfür unterhalb der Sintertemperatür schmelzende Salze geeignet, welche die Mischkristallbildung fördern, ohne in das Gitter der Metalloxyde einzudringen, und welche sich nach der Sinterung, z. B. durch Waschen inLösungsmitteln, leicht entfernen lassen. Die so erhaltene Sintermasse wird zerkleinert und, sofern ein auswaschbares Flußmittel verwendet wurde, dieses durch Auswaschen entfernt. Anschließend wird durch eine weitere Wärmebehandlung in reduzierender Atmosphäre, z. B. Wasserstoff, das gewünschte Legierungspulver für die Massekerne gewonnen. Ein hierbei gegebenenfalls eintretendes leichtes Zusammensintern kann in einem Kollergang ohne stärkere mechanische Verformung beseitigt werden.Method of manufacturing alloy powder for bulk cores Die Invention has a method of making alloy powder for bulk cores from metal oxides or other metal compounds, which are produced by an annealing treatment easily disintegrate into metal oxides, the subject. This procedure is characterized by that a mixture of metal oxides and / or such metal compounds, optionally with the addition of flux, sintered in a non-reducing atmosphere or melted together and after subsequent crushing into one for mass cores suitable fineness is reduced to alloy powder. By sintering or melting together the metal oxides or the metal oxides obtained from metal compounds are obtained a homogeneous, brittle mass that can easily be broken down into fine particles, whereupon, through the subsequent reduction, an alloy powder in the required Delicacy gains in that the individual metal components are evenly distributed. As metal compounds, for. B. carbonates, hydroxides, oxalates of the metals iron, Nickel, molybdenum, chromium, copper, vanadium, cobalt, aluminum, silicon, manganese or the like. Like. Come into use. The procedure for sintering metal compounds is as follows: that you first choose a temperature at which the metal compounds in pure Oxides decompose, but there is still no diffusion between the volatile components and the resulting oxides takes place, so that the volatile constituents can evaporate. The temperature is then increased to about 100 to 130 ° C increased, in order to give the metal oxide obtained as extensive a mixed crystal formation as possible enable. The temperature can also be increased so that it melts together entry. In the case of sintering, fluxes can optionally be added, Melting salts below the sintering temperature are suitable for this purpose, which promote mixed crystal formation without penetrating the lattice of the metal oxides, and which after sintering, e.g. By washing in solvents, easily have it removed. The sintered mass obtained in this way is crushed and, if one Washable flux was used, this removed by washing. Afterward is by a further heat treatment in a reducing atmosphere, e.g. B. hydrogen, obtained the desired alloy powder for the mass cores. One here if necessary Any slight sintering that occurs can be carried out in a pan mill without stronger mechanical Deformation can be eliminated.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Legierungspulvers für Massekerne aus Metalloxyden oder anderen Metallverbindungen, welche durch eine Glühbehandlung leicht in Metalloxyde zerfallen, dadurch gekennzeichnet, daß ein Gemisch aus Metalloxyden und/oder solchen Metallverbindungen, gegebenenfalls unter Zusatz von Flußmitteln, in einernichtreduzierendenAtmosphäre gesintert oder zusammengeschmolzen und nach anschließender Zerkleinerung zu einer für Massekerne geeigneten Feinheit zu Legierungspulver reduziert wird.PATENT CLAIM: Process for the production of an alloy powder for mass cores made of metal oxides or other metal compounds, which by a Annealing treatment easily disintegrates into metal oxides, characterized in that a Mixture of metal oxides and / or such metal compounds, optionally under Addition of fluxes, sintered or fused together in a non-reducing atmosphere and after subsequent comminution to a fineness suitable for mass cores is reduced to alloy powder.
DES24029A 1951-07-20 1951-07-20 Process for producing an alloy powder for mass cores Expired DE881109C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES24029A DE881109C (en) 1951-07-20 1951-07-20 Process for producing an alloy powder for mass cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES24029A DE881109C (en) 1951-07-20 1951-07-20 Process for producing an alloy powder for mass cores

Publications (1)

Publication Number Publication Date
DE881109C true DE881109C (en) 1953-06-29

Family

ID=7477661

Family Applications (1)

Application Number Title Priority Date Filing Date
DES24029A Expired DE881109C (en) 1951-07-20 1951-07-20 Process for producing an alloy powder for mass cores

Country Status (1)

Country Link
DE (1) DE881109C (en)

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