DE574807C - Process for the production of tool steels, in particular high-speed steels - Google Patents

Process for the production of tool steels, in particular high-speed steels

Info

Publication number
DE574807C
DE574807C DED56705D DED0056705D DE574807C DE 574807 C DE574807 C DE 574807C DE D56705 D DED56705 D DE D56705D DE D0056705 D DED0056705 D DE D0056705D DE 574807 C DE574807 C DE 574807C
Authority
DE
Germany
Prior art keywords
steels
cerium
production
particular high
speed
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
DED56705D
Other languages
German (de)
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.)
Deutsche Edelstahlwerke AG
Original Assignee
Deutsche Edelstahlwerke 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 Deutsche Edelstahlwerke AG filed Critical Deutsche Edelstahlwerke AG
Priority to DED56705D priority Critical patent/DE574807C/en
Application granted granted Critical
Publication of DE574807C publication Critical patent/DE574807C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Description

AUSGEGEBENEM
,20. APRIL ,1933FROM GIVEN
, 20. APRIL, 1933

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

KLASSE 18 d GRUPPECLASS 18 d GROUP

Zusatz zum Patent 561Addition to patent 561

Patentiert im Deutschen Reiche vom 10. Oktober 1928 ab Das Hauptpatent hat angerangen am 21. September 1928.Patented in the German Empire from October 10, 1928 The main patent came into effect on September 21 , 1928.

Gegenstand des Patents 561051 ist ein Verfahren zur Erhöhung der Schnitthaltigkeit von mit Cer und Vanadium legiertem Werkzeugstahl, insbesondere Schnellarbeitsstahl, das dadurch gekennzeichnet ist, das für Cer und Vanadium das Verhältnis Cer : Vanadium wie I : 3 gewählt wird.The subject of the patent 561051 is a Process for increasing the edge retention of tool steel alloyed with cerium and vanadium, in particular high-speed steel, which is characterized by that for cerium and vanadium, the cerium: vanadium ratio is chosen as I: 3.

Vorliegende Erfindung ist- eine weitere Ausbildung oder Verbesserung des Verfahrens des Hauptpatents und besteht darin, daß als Zusatz eine Cervorlegierung angewandt wird, die im Gegensatz zu den normal im Handel befindlichen Cerprodukten eine erhöhte Schmelztemperatur besitzt. DieThe present invention is a further development or improvement of the method of the main patent and consists in that a cerium pre-alloy is used as an additive which, in contrast to the cerium products normally found on the market, has an increased melting temperature. the

15. leicht schmelzbaren, käuflichen Cerlegierungen haben den Nachteil, daß sie, als Zusätze für Stahl angewendet, in mehr oder weniger hohem Maße verschlacken und daher zu einem großen Teil verlorengehen, wodurch unter Umständen zwar eine reinigende Wirkung erzielt wird, jedoch die im Hauptpatent erkannte Wirkung, nämlich die Erhöhung der Schnitthaltigkeit, mehr oder weniger ausbleibt. Wird dagegen gemäß der Erfindung der Schmelzpunkt der als Zusatz verwendeten Cerlegierung. erhöht, beispielsweise auf 11000 und darüber, gegenüber etwa 9000 im Höchstfalle bei den bisher verwendeten Legierungen, so tritt eine Verschlackung in erheblich geringem Maße ein, und fast das ganze Cer kann als Legierungsbestandteil nutzbar gemacht werden.15. Easily fusible, commercially available cerium alloys have the disadvantage that they, when used as additives for steel, slag to a greater or lesser extent and are therefore largely lost, whereby a cleaning effect is achieved under certain circumstances, but that recognized in the main patent Effect, namely the increase in edge retention, is more or less absent. On the other hand, according to the invention, it becomes the melting point of the cerium alloy used as an additive. increased, for example to 1100 0 and above, compared to about 900 0 at the most in the case of the alloys used so far, slagging occurs to a considerably small extent, and almost all of the cerium can be made usable as an alloy component.

Um die Schmelztemperaturen handelsüblicher Legierungen, bestehend aus etwa 96% Cer und 3% Eisen, zu erhöhen, können verschiedene Zusätze angewendet werden. Beispielsweise bringt den gewünschten Erfolg eine beträchtliche Erhöhung des Eisengehaltes, so daß die angewendete Cerlegierung etwa je zur Hälfte aus Eisen und Cer besteht (z. B. 60% Eisen und 40% Cer),To the melting temperatures of commercially available alloys, consisting of approximately 96% cerium and 3% iron, to increase it, various additives can be applied. For example brings the desired success a considerable increase in the iron content, so that the cerium alloy used about consists of half iron and half cerium (e.g. 60% iron and 40% cerium),

Die Zusätze dieser Ceflegierung erfolgen am besten in der Weise:The additions of this Ceflegierung take place best in the way:

Der Stahl wird in einem üblichen Schmelzofen zuerst vollständig desoxydiert, so daß sich möglichst wenig oxydische Bestandteile, die eine Verschlackung van Cer begünstigen, im Stahlbade befinden. Der Zusatz erfolgt unmittelbar vor dem Abgießen im Ofen oder während des Gießens in der Pfanne, wobei an- S" gestrebt wird, daß die nunmehr cerhaltige Stahllegierung möglichst kurze Zeit etwaigen oxydierenden Einflüssen der Ofenatmosphäre ausgesetzt ist.The steel is first completely deoxidized in a conventional melting furnace, so that as few oxidic components as possible, which favor a slagging of cerium, are in the steel bath. The addition is made immediately before pouring in the oven or during the pouring in the ladle, the aim being that the now ceriferous Steel alloy for as short a time as possible any oxidizing influences of the furnace atmosphere is exposed.

Claims (2)

Patentansprüche:Patent claims: ι. Verfahren zur Herstellung von Werkzeugstählen, insbesondere Schnellarbeitsstählen, nach Patent 561 051, dadurch gekennzeichnet, daß eine Cervorlegierung verwendet wird, deren Schmelzpunkt bei etwa 11000 C und darüber liegt,ι. A process for the production of tool steels, especially high-speed steels, as claimed in patent 561 051, that a Cervorlegierung is used whose melting point at about 1100 0 C and higher, 2. Vorlegierung zur Durchführung des Verfahrens nach Anspruch 1, gekennzeich- to net durch annähernd gleiche Gehalte an Eisen und Cer.2. master alloy for performing the method according to claim 1, marked to net due to approximately the same iron and cerium content.
DED56705D 1928-10-10 1928-10-10 Process for the production of tool steels, in particular high-speed steels Expired DE574807C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED56705D DE574807C (en) 1928-10-10 1928-10-10 Process for the production of tool steels, in particular high-speed steels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED56705D DE574807C (en) 1928-10-10 1928-10-10 Process for the production of tool steels, in particular high-speed steels

Publications (1)

Publication Number Publication Date
DE574807C true DE574807C (en) 1933-04-20

Family

ID=7056965

Family Applications (1)

Application Number Title Priority Date Filing Date
DED56705D Expired DE574807C (en) 1928-10-10 1928-10-10 Process for the production of tool steels, in particular high-speed steels

Country Status (1)

Country Link
DE (1) DE574807C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396804A1 (en) * 1977-07-05 1979-02-02 Johnson Matthey Co Ltd YTTRIUM ALLOYS AND MANUFACTURING PROCESS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396804A1 (en) * 1977-07-05 1979-02-02 Johnson Matthey Co Ltd YTTRIUM ALLOYS AND MANUFACTURING PROCESS

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