DE895301C - Use of iron powder for the production of sintered bodies - Google Patents

Use of iron powder for the production of sintered bodies

Info

Publication number
DE895301C
DE895301C DEM5391D DEM0005391D DE895301C DE 895301 C DE895301 C DE 895301C DE M5391 D DEM5391 D DE M5391D DE M0005391 D DEM0005391 D DE M0005391D DE 895301 C DE895301 C DE 895301C
Authority
DE
Germany
Prior art keywords
iron
production
sintered bodies
iron powder
powder
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
DEM5391D
Other languages
German (de)
Inventor
Gerhard Dr-Ing Naeser
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 AG filed Critical Mannesmann AG
Priority to DEM5391D priority Critical patent/DE895301C/en
Application granted granted Critical
Publication of DE895301C publication Critical patent/DE895301C/en
Expired legal-status Critical Current

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

Landscapes

  • Compositions Of Oxide Ceramics (AREA)

Description

Verwendung von Eisenpulver zur Herstellung von Sinterkörpern Bei der Herstellung von Sinterkörpern, d. h. in der sogenannben Eisenkeramik, benötigb man Eisen- pulver, dias nach dem Pressen bei Raumtemperatur eine gute Festigkeit besitzt und leicht gesintert wenden kann. Ein derartiges Pulver kann z.. B. durch Granulieren (in Pulver überführen) von reinstem scliwediischem Roheisen und' anschließendes Entkohlen mit Hilfe von: CO/C02-Gemiwhen ge- wonnen werden. Als Rohstoff ist reinstes Roheisen mit niedrigem Phosphor- und! Schwefeligehalt er- forderlich. Da idie meisten Länder nicht in der Lage sind, reinstes Roheisen im Holzkohlehochofen zu erschmelzen, konnte dieses Verfahren nur eine be- schräikte Anwendung finden,. Die Erfindung sucht die Verwendung eines Eisenpulvers zu ermöglichen:, dias aazs gewöhnlichem Roh; eisen, beispielsweise Thomasroheisen, gewonnen worden ist und dennoch Vorzüge gegenüber den aus schwedischem Eisenpulver hergestellten Erzeugnissen mit sich bringt.Use of iron powder for the production of sintered bodies In the production of sintered bodies, ie in the so-called iron ceramics, you need iron powder, dias after pressing at room temperature has good strength and is easily sintered can turn. Such a powder can e.g. by granulating (converting into powder) of purest Scliwedian pig iron and 'subsequent Decarburizing with the help of: CO / C02 mixtures be won. The raw material is pure pig iron with low phosphorus and! Sulfur content conducive. Since i most countries will not be able to are to be pure pig iron in the charcoal furnace melt, this process could only find oblique application. The invention seeks to enable the use of an iron powder: dias as usual raw; iron, for example Thomas pig iron, and still has advantages over products made from Swedish iron powder.

Der Erfindungsgedanke -besteht in der Verwendung eines Eisenpulvers, Idas durch überfrischen von Röheisen, insbesondere von im Konverter oder einer anderen geeigneten Sohmelzvorrichbung üiberfriisehbem Thomasiroheisens, mit ansch)lieBendem Aufkohlen, Überführen in Pulverform und Frischen im festen Zustande hergestellt worden. ist, als Ausgangswerkstoff zur Herstellung von Sinterkörpern. Im einzelnen vollzieht sich der Vorgang wie folgt: Das. Thomas@roheiisen wird. im Thomaskont- werter überbliasen, d. h. so lange gefriecht, bis Sil,i-- cium und Mangan vollständiig verbrannt sind und- .der Phosphorgehalt unter o,o5 0/0 gesunken ist. Anr schließend wind dies. Eisen i-n.einem basiisichen Ofen (Konverter, Drehrohrofen od-. (clg1.) mit Koks wieder aufgekohlt, darauf in Pulver übergeführt und mit CO/C02 Gemischen entkoblt. Das Awfkdhlen dies- im Konverter gefrischten Eisens hat den Zweck, das Eisen bei der Verdüs.ung durch Preßluft odLr Wasiserdiampf vor ,Oxydation zu. schützten und den Zerteilungsgrad sowie die Kornform ides Pulvers günstig zu beeinfius,senn. Als @besanderer Vorteil hat sich ergeben, d'aß das erfindungsgemäß hergestellte sxiliciumfreie Puawer eine wesentliche -bessere Verpreßibarkeit und Sinter- fähigkeit besitzt als Eisen, das auch nur noch _ Spumen Siliciulin enthält. Selbst beim Entkohlen eines E:lsens mit beispielsweise nur 0,05 % Si ent- steht auf den Eisenkö.rncben eine Kieselsäurehaut, die die Preß- und Sinterbarkeit -sehr stark herab- setzt: The idea of the invention consists in the use of an iron powder, which has been produced by over-freshening crude iron, in particular by overflowing Thomas iron in the converter or another suitable melting device, with subsequent carburization, conversion into powder form and freshening in the solid state. is used as a starting material for the production of sintered bodies. In detail, the process takes place as follows: That. Thomas @ roheiisen will. in the Thomas account worth overblown, that is, frilled until Sil, i-- cium and manganese are completely burned and- .the phosphorus content has fallen below 0.05 0/0. Call in conclusion this winds. Iron in a basic furnace (Converter, rotary kiln or (clg1.) With coke again carburized, then converted into powder and with CO / C02 mixtures decobed. The Awfkdhlen this- im The purpose of the refined iron converter is that Iron in the atomization by compressed air or Wasiser vapor before, oxidation closed. protected and the Degree of division and the grain shape of the powder cheap to infius, senn. The @besanderer advantage turned out to be that silicon-free puawers made in accordance with the invention a much better compressibility and sintering ability than iron, only that _ Spumen contains Siliciulin. Even when decarbonizing an E: lsens with, for example, only 0.05 % Si there is a silica skin on the iron barrel, which greatly reduces the compressibility and sinterability puts:

Claims (1)

PATENTANSPRUCH: Die Verwendung eines Eisenpulvers, dies durch Überfrisahien von Roheisen, insbesondere von im Konverter oder einer anderen geeigneten Schmelzvorrichtung überfrischtem Thomasmo!h- eisens, mit anschließendem Aufkohlen, Über- führen. in und Frischen im festen Zustande heugestellt worden ist, als Ausgangs- werkstoff zur Herstellung von Sinterkörpern.
PATENT CLAIM: The use of an iron powder, this due to overshooting of pig iron, in particular from in the converter or another suitable Melting device refurbished Thomasmo! H- iron, with subsequent carburizing, over- to lead. in and freshness in the solid Condition has been established as a starting point material for the production of sintered bodies.
DEM5391D 1943-03-23 1943-03-23 Use of iron powder for the production of sintered bodies Expired DE895301C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM5391D DE895301C (en) 1943-03-23 1943-03-23 Use of iron powder for the production of sintered bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM5391D DE895301C (en) 1943-03-23 1943-03-23 Use of iron powder for the production of sintered bodies

Publications (1)

Publication Number Publication Date
DE895301C true DE895301C (en) 1953-11-02

Family

ID=7293099

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM5391D Expired DE895301C (en) 1943-03-23 1943-03-23 Use of iron powder for the production of sintered bodies

Country Status (1)

Country Link
DE (1) DE895301C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155460B (en) * 1954-03-26 1963-10-10 Stora Kopparbergs Bergslags Ab Process for the powder metallurgical production of hot-rolled steel products from pig iron and iron ore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155460B (en) * 1954-03-26 1963-10-10 Stora Kopparbergs Bergslags Ab Process for the powder metallurgical production of hot-rolled steel products from pig iron and iron ore

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