DE800483C - Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces - Google Patents

Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces

Info

Publication number
DE800483C
DE800483C DEP36254A DEP0036254A DE800483C DE 800483 C DE800483 C DE 800483C DE P36254 A DEP36254 A DE P36254A DE P0036254 A DEP0036254 A DE P0036254A DE 800483 C DE800483 C DE 800483C
Authority
DE
Germany
Prior art keywords
steel
basic
manufacture
temperature
walled castings
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
DEP36254A
Other languages
German (de)
Inventor
Erich Dr-Ing Lanzendoerfer
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.)
EISENWERKE MUELHEIM MEIDERICH
Original Assignee
EISENWERKE MUELHEIM MEIDERICH
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 EISENWERKE MUELHEIM MEIDERICH filed Critical EISENWERKE MUELHEIM MEIDERICH
Priority to DEP36254A priority Critical patent/DE800483C/en
Application granted granted Critical
Publication of DE800483C publication Critical patent/DE800483C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/30Regulating or controlling the blowing
    • C21C5/34Blowing through the bath

Landscapes

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

Description

Herstellen von für das Vergießen auch zu dünnwandigen Gußstücken geeigneten Stahlschmelzen in basisch zugestellten Öfen Bei der Ilerstelltitig von Stahlgußwerkstiicken, insbesondere solchen kleinerer Querschnittsab- inessungen, atis basischem Stahl ist man bisher dar- auf angewiesen, den basischen Stahl in einem Elektroofen zu erzeiigen, da der in einer basisch zugestellten Kleinbesseinerbirne hergestellte Stahl etwa gleicher Ztisaninietisetzuttg trotz gleicher Temperatur nicht den nötigen Flüssigkeitgrad be- sitzt, um auch kleine Forin<luerschnitte, z. 13. unter min. auszufüllen. I@rfindungsgeniüli gelingt es nun, Stahlgußwerk- stücke auch kleinerer ()uerschnittsabmessungen aus einem in der basisch zugestellten Kleinbessemer- birneerschinolzenen Stahl dadurch herzustellen. daß in einer mit seitlicher @@-indzttfiilirung ausgerüsteten Birne durch an sich bekannte I'.nwendung von sauer- stoffangcreicherteinWind dieTeinperatur des Stahl- bades so erhöht wird. daß ein Stahl von sehr hohem Flüssigkeitsgrad anfaillt. Aii :ich ist die Anwendung von sauerstoffange- reichertem Wind beim Thomasverfahren, d. 1i. beim Großkonverter, bekannt, wo diese -Maßnahme in der Hauptsache dazu dient, die Blasezeit zu verkürzen und höhere Schrottsätze verarbeiten zu können. Bei dem neuen Verfahren dient diese -Maßnahme dagegen ini wesentlichen dazu, die Vergießbarkeit des Stahles zur einwandfreien Herstellung diinn- wandiger Stalilgußwerkstücke zu verbessern. Das neue Verfahren wird vorzugsweise derart durchgeführt, daß die Temperatur des Stahlbades in der basisch zugestellten Kleinbessemerbirne mittel: des sauerstoffangereicherten Windes derart erhöht wird, claß sie über der Schmelztemperatur der sich dabei bildenden Schlacke liegt. Um dabei nicht auf allzu hohe Temperaturen zu gelangen, ist es empfehlenswert, der Schlacke deren Schinelz- punkt erniedrigende Zusiitze, wie z. B. Flußspat o. dgl., zuzugeben. Dies empfiehlt sich insbesondere in den Fällen, in denen sonst zu hohe Temperaturen erforderlich wären.Manufacture of steel melts that are also suitable for casting thin-walled castings in basic-lined furnaces In the production of steel castings, especially those of smaller cross-sectional In measurements, atis basic steel, one has so far been relies on the basic steel in one To produce electric furnace, since the in a basic supplied Kleinbesseinerear steel about the same Ztisaninietisetzuttg despite the same Temperature does not have the necessary degree of fluidity sits in order to also make small forin <luerschnitte, e.g. 13. under min. to be filled out. I @ rfindungsgeniüli it now succeeds in steel casting Pieces of smaller () cross-section dimensions one in the basic delivered Kleinbessemer- to produce pear-pear-shaped steel. that in one equipped with side ventilation Pear through the well-known use of sour Wind the stone temperature of the steel bath is so increased. that a steel of very high Fluidity chamfered. Aii: I am the application of oxygen-rich richer wind in the Thomas process, d. 1i. at the Large converter, known where this measure in the The main thing is to shorten the bubble time and to be able to process higher scrap rates. This measure is used in the new procedure on the other hand, essentially, the castability of steel for the perfect production of thin to improve walled cast steel workpieces. The new method is preferably such carried out that the temperature of the steel bath in the basic supplied Kleinbessemer pear medium: of the oxygen-enriched wind so is increased, it is above the melting temperature the slag that forms in the process. To do it not to get too high temperatures is it is advisable to give the slag its Schinelz- point degrading additions, such as B. fluorspar or the like. To admit. This is particularly recommended in those cases in which temperatures would otherwise be too high.

Auf diese Weise wird ein Stahl erzeugt, der nicht nur den nötigen Flüssigkeitsgrad besitzt, sondern auch gegenüber dem normalen sauren Bessemerstahl erheblich niedrigere Phosphor- und Schwefelgehalte aufweist und aus welchem unmittelbar Gußstücke auch kleinerer Querschnittsabmessungen, z. B. von etwa 15 mm und darunter, einwandfrei gegossen %%,erden können.In this way, a steel is produced that not only has the necessary Fluidity, but also compared to normal acidic Bessemerstahl has significantly lower phosphorus and sulfur contents and from which directly Castings also of smaller cross-sectional dimensions, e.g. B. of about 15 mm and below, perfectly poured %%, able to earth.

Claims (1)

PATENTANSPRÜCHE: 1. Verfahren zum Herstellen von für das Vergießen auch zu dünnwandigen Gußstücken geeigneten Stahlschmelzen in basisch zugestellten Ofen, dadurch gekennzeichnet, daß die Temperatur der Stahlschmelze bei ihrer Herstellung in einer basisch zugestellten Kleinbessemerbirne mit seitlicher Windzuführung durch Verwendung von sauerstoffangereichertem Wind bis auf die erforderliche Gußtemperatur erhöht wird. a. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Temperatur des Stahlbades bis über die Schmelztemperatur der sich bildenden Schlacke erhöht wird. 3. Verfahren nach Anspruch z, dadurch gekennzeichnet, daß die Schmelztemperatur der Schlacke durch geeignete Zusätze, wie Flußspat, erniedrigt wird.CLAIMS: 1. Method of making for potting also for thin-walled castings suitable steel melts in basic lined Furnace, characterized in that the temperature of the steel melt during its manufacture in a basic supplied Kleinbessemerbirne with lateral wind feed Use of oxygen-enriched wind down to the required casting temperature is increased. a. Method according to claim i, characterized in that the temperature of the steel bath increased to above the melting temperature of the slag that forms will. 3. The method according to claim z, characterized in that the melting temperature the slag is lowered by suitable additives such as fluorspar.
DEP36254A 1949-03-10 1949-03-10 Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces Expired DE800483C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP36254A DE800483C (en) 1949-03-10 1949-03-10 Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP36254A DE800483C (en) 1949-03-10 1949-03-10 Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces

Publications (1)

Publication Number Publication Date
DE800483C true DE800483C (en) 1950-11-09

Family

ID=7374650

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP36254A Expired DE800483C (en) 1949-03-10 1949-03-10 Manufacture of steel melts that are also suitable for casting thin-walled castings in basic furnaces

Country Status (1)

Country Link
DE (1) DE800483C (en)

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