DE967361C - Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures - Google Patents

Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures

Info

Publication number
DE967361C
DE967361C DEM11657A DEM0011657A DE967361C DE 967361 C DE967361 C DE 967361C DE M11657 A DEM11657 A DE M11657A DE M0011657 A DEM0011657 A DE M0011657A DE 967361 C DE967361 C DE 967361C
Authority
DE
Germany
Prior art keywords
wires
sintering
strand
tubes
arrangement
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
DEM11657A
Other languages
German (de)
Inventor
Dr-Ing Kurt Gruber
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.)
Mannesmann Meer AG
Original Assignee
Mannesmann Meer 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 Mannesmann Meer AG filed Critical Mannesmann Meer AG
Priority to DEM11657A priority Critical patent/DE967361C/en
Application granted granted Critical
Publication of DE967361C publication Critical patent/DE967361C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B21/00—Pilgrim-step tube-rolling, i.e. pilger mills
    • B21B21/005—Pilgrim-step tube-rolling, i.e. pilger mills with reciprocating stand, e.g. driving the stand
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers

Description

Es ist bekannt, Eisen- und Metallpulver durch Walzen von Bändern und Drähten zu verarbeiten, indem z. B. Eisen- oder Metallpulver vor dem Walzspalt eines horizontal gelegten, mit besonderen Walzen ausgestatteten Duowalzwerks aufgestreut wird. Durch den Walzprozeß wird das Pulver zu einem Strang - Band oder Draht -verdichtet. Anschließend an die Walzung findet eine Sinterung und Weiterverarbeitung der Bänder statt.It is known to produce iron and metal powder by rolling strips and To process wires by z. B. iron or metal powder in front of the roll gap horizontally laid duo rolling mill equipped with special rollers will. During the rolling process, the powder is compacted into a strand - tape or wire. Subsequent to rolling, the strips are sintered and further processed instead of.

Es ist ferner bekannt, hydraulische Strangpressen für das Herstellen von Drähten. und einfachen Profilen aus Metallpulvern anzuwenden. Dabei wird das vorbereitete Pulver in den Rezipienten einer Strangpresse eingefüllt und durch eine Düse ausgepreßt. Anschließend an diesen Preßvorgang findet die Sinterung des Stranges statt. Es ist klar, daß der Strang nach dem Sintern noch keine hohe Zugfestigkeit aufweist. Es ist bisher nicht gelungen, den auf diese Weise kontinuierlich hergestellten Strang mit rundem oder rechteckigem Querschnitt sofort einem üblichen Walz- oder Ziehprozeß zuzuführen., da die bei dem normalen Walzen in Duowalzwerken auftretenden Kräfte Risse verursachen würden. Das gleiche gilt für die Verformung in Ziehringen.It is also known to manufacture hydraulic extrusions of wires. and simple profiles made of metal powders. This will be prepared powder is filled into the recipient of an extruder and through a Nozzle pressed out. Subsequent to this pressing process, the strand is sintered instead of. It is clear that the strand does not have high tensile strength after sintering having. So far it has not been possible to continuously produce the in this way Strand with a round or rectangular cross-section immediately a standard rolling or Feeding the drawing process., Since those occurring in normal rolling in duo rolling mills Forces would cause cracks. The same applies to the deformation in draw rings.

Es ist schließlich auch bekannt, Eisenpulver strangzupressen und den Strang kalt zu verformen. Erfindungsgemäß wird vorgeschlagen, für dieses Kaltverformen von Bändern., Drähten und Rohren aus stranggepreßtem und gesintertem Metallpulver das unter dem Namen »Kaltpilgern« bekanntgewordene Walzverfahren anzuwenden. Wider Erwarten hat sich gezeigt, daß trotz des hohen Verformungsgrades beim Kaltpilgern nicht die sonst beim üblichen Walzen oder Ziehen auftretenden Risse verursacht werden, offenbar weil die Verformung unter allseitigem Druck stattfindet und auf eine Strecke verteilt wird, die dem Hub des hin-und hergehenden Walzgerüstes entspricht. Diese allmähliche Verformung unter allseitigem Druck ist für die einwandfreie und rißlose Verdichtung der kontinuierlich stranggepreßten und gesinterten Metallpulver entscheidend. Nach dem Kaltpilgern muß ein Glühprozeß stattfinden. Anschließend an diesen Glühprozeß können die in der Technik üblichen Zieh- und Walzverfahren angewendet werden.After all, it is also known to extrude iron powder and the Cold deform strand. According to the invention it is proposed for this cold forming of tapes, wires and tubes made from extruded and sintered metal powder to use the rolling process known under the name of »cold pilgrimage«. Contrary Expectation has shown that despite the high degree of deformation during the cold pilgrimage the cracks that otherwise occur during normal rolling or drawing are not caused, apparently because the deformation takes place under pressure on all sides and over a stretch is distributed, which corresponds to the stroke of the reciprocating roll stand. These gradual deformation under pressure from all sides is essential for perfect and crack-free Compaction of the continuously extruded and sintered metal powder is crucial. After the cold pilgrimage, an annealing process must take place. Subsequent to this annealing process the drawing and rolling processes customary in the art can be used.

In der Zeichnung ist eine Ausführungsform einer Anordnung zur Ausführung des Verfahrens gemäß der Erfindung dargestellt.In the drawing is one embodiment of an arrangement for execution of the method according to the invention.

Abb. i zeigt das Ende einer Preßvorrichtung i mit der Preßdüse, einen Sinterofen 2, der durch Hochfrequenz, Widerstandserhitzung oder Gas erhitzt werden kann, und. eine Transportrolle 3. Von dieser Transportrolle gelangt der gesinterte Strang, wie aus Abb. 2 ersichtlich, in ein Kaltpilgerwalzwerk q.. Der zur Durchführung des Glühprozesses erforderliche Ofen ist nicht dargestellt.Fig. I shows the end of a press device i with the press nozzle, one Sintering furnace 2, which can be heated by high frequency, resistance heating or gas can, and. a transport roller 3. The sintered one arrives from this transport roller Strand, as can be seen in Fig. 2, in a cold pilger mill q .. The implementation The furnace required for the annealing process is not shown.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zum Herstellen von Drähten, Bändern und Rehren durch Pressen von pulverförmigen Metallen, insbesondere Metallgemischen, zu einem Strang, Sintern des Stranges und Kaltverformen, dadurch gekennzeichnet, daß der gesinterte Strang kalt gepilgert wird. PATENT CLAIMS: i. Process for the manufacture of wires, tapes and stirring by pressing powdered metals, especially metal mixtures, to form a strand, sintering the strand and cold forming, characterized in that that the sintered strand is cold pilgrimage. 2. Anordnung zur Ausführung des Verfahrens nach Anspruch i, gekennzeichnet durch eine Presse, einen hinter der Düse der Presse angeordneten Sinterofen und ein sich daran anschließendes Kaltpilgerwalzwerk. In Betracht gezogene Druckschriften: Deutsche Patentschriften. Nr. 58 762, 638 195; Kieffer und Hotop, Sinterlisen und Sinterstahl, Wien, 1948, Springer Verlag, S. 257 bis 265.2. Order to carry out the procedure according to claim i, characterized by a press, one behind the nozzle of the press arranged sintering furnace and an adjoining cold pilger mill. In Publications considered: German patents. No. 58 762, 638 195; Kieffer and Hotop, Sinterlisen and Sinterstahl, Vienna, 1948, Springer Verlag, p. 257 to 265.
DEM11657A 1951-11-11 1951-11-11 Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures Expired DE967361C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM11657A DE967361C (en) 1951-11-11 1951-11-11 Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM11657A DE967361C (en) 1951-11-11 1951-11-11 Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures

Publications (1)

Publication Number Publication Date
DE967361C true DE967361C (en) 1957-11-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEM11657A Expired DE967361C (en) 1951-11-11 1951-11-11 Method and arrangement for the production of wires, bands and tubes by extrusion and sintering of powdery metals, in particular metal mixtures

Country Status (1)

Country Link
DE (1) DE967361C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58762C (en) * M. MANNESMANN in Remscheid-Bliedinghausen Method and device for forming, rolling and sizing tubes and other hollow bodies
DE638195C (en) * 1933-10-25 1936-11-11 Hans Schuster Dipl Ing Pilgrimage process for the production of thin strips and sheets from a thick initial workpiece

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58762C (en) * M. MANNESMANN in Remscheid-Bliedinghausen Method and device for forming, rolling and sizing tubes and other hollow bodies
DE638195C (en) * 1933-10-25 1936-11-11 Hans Schuster Dipl Ing Pilgrimage process for the production of thin strips and sheets from a thick initial workpiece

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