DE730886C - Process for the production of high quality crucible cast steel - Google Patents

Process for the production of high quality crucible cast steel

Info

Publication number
DE730886C
DE730886C DEV34108D DEV0034108D DE730886C DE 730886 C DE730886 C DE 730886C DE V34108 D DEV34108 D DE V34108D DE V0034108 D DEV0034108 D DE V0034108D DE 730886 C DE730886 C DE 730886C
Authority
DE
Germany
Prior art keywords
production
cast steel
high quality
scrap
steel
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
DEV34108D
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEV34108D priority Critical patent/DE730886C/en
Application granted granted Critical
Publication of DE730886C publication Critical patent/DE730886C/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
    • C21C5/02Crucible furnace process

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Verfahren zur Herstellung von hochwertigem Tiegelgußstahl Zur Herstellung von hochwertigem Tiegelgußstahl ist ein besonders reiner Einsatz erforderlich, der deshalb bisher zu erheblichem Teil aus schwedischen Rohschienen und besonders ausgesuchtem Schrott bestand. Flußeisenschrotterster Schmelzung und besonderer Reinheit ist auch zur bequemeren Tiegelbeschickung schon zu Granalien vergossen worden, die dann den ausschließlichen Einsatz bei der Tiegelstahlerzeugung bildeten und durch kohlenstoffhaltige Mittel, wie beispielsweise Kienruß; aufgekohlt wurden.Process for the production of high quality crucible cast steel For production of high-quality crucible cast steel, a particularly pure use is required, the therefore so far to a considerable extent from Swedish raw rails and specially selected Scrap was there. River iron scrap of the highest melting and special purity is also for more convenient crucible loading has already been poured into granules, which then the exclusive use in the crucible steel production and formed by carbonaceous Agents such as pine soot; have been carburized.

Gegenstand der Erfindung ist nun die Verwendung von in Graphittiegeln umgeschmolzenem und zu Granalien vergossenem minder-«vertigem, ,an sich für diesen Zweck ungeeignetem Stahlschrott zur Herstellung von hochwertigem Tiegelgußstahl. Durch das Umschmelzen eines minderwertigen Stahlschrotts in einem für die Tegelstahlhers.tellung üblichen Tiegel und das nachfolgende Granulieren dieser ,S.chrottschmelze geschieht eine so überraschend weite Veredlung des. Schrotts, daß dieser nunmehr zu einem hochwertigen Einsatz für die Tiegelgußstahlherstellung wird, bei der man dann praktisch ohne den Einsatz schwedischen Holzkohlenroheisens oder schwedischer Rohschienen auskommen kann. An sich ist es bekannt, daß durch das. Granulieren eine gewisse Reinigung des Eisens erfolgt, die aber allein noch nicht genügt, es als Einsatz für die Tiegelgußstahlerzeugung brauchbar zu machen. Auch das Einschmelzlen des minderwertigen Schrotts im Elektro- oder Hochfrequ:enzofen und das nachfolgende Granulieren führt hier noch nicht zum Ziel, vielmehr sind für die Tiegelgußstahlerzeugung nur solche ,aus minderwertigem Schrott hergestellte Granalien brauchbar, deren Umschmelzen in Graphittiegelnerfolgte. Beim oder nach dem Einschmelzen kann man, den Schrott g'egeb'enenfalls .auch noch legieren, wie sich selbstverständlich ,auch von vornherein legierter Schrott in der gekennzeichneten Weise zu Granalien verarbeiten läßt.The invention now relates to the use of graphite crucibles inferior, remelted and cast into granules, in itself for this Purpose of unsuitable steel scrap for the production of high quality crucible cast steel. By remelting an inferior steel scrap in one for the Tegel steel manufacture usual crucible and the subsequent granulation of this, S.chrottschmelze happens such a surprisingly extensive refinement of the scrap that it now becomes a high-quality use for the crucible cast steel production is, in which one then practical without the use of Swedish charcoal pig iron or Swedish raw rails can get along. It is known per se that by granulating a certain Cleaning of the iron takes place, but that alone is not enough to use it as an insert to make it useful for crucible cast steel production. Melting down the Inferior scrap in the electric or high-frequency furnace and the following Granulating does not lead to the goal here; rather, it is used for crucible cast steel production only those granules made from inferior scrap can be used if they are remelted in graphite crucibles. During or after the meltdown you can, the scrap If necessary, also alloy from the start, as goes without saying allows alloyed scrap to be processed into granules in the manner indicated.

Das Vergießen der flüssigen Schrottschmelze zu Granalien geschieht in bekannter Weise am einfa@chsten und wirtschaftlichsten durch Einlaufenlassen meine Kühlflüssigkeit, vornehmlich in Wasser. Es können aber auch andere Kiihlbäd.er, wie C51- oder Metallbäder, Verwendung finden. Auch kann man die Granalienbildung durch Abschrecken der Stahl schmelze und Einlaufenlassen in einen Luftstrahl oder durch Abgießen der Schmelze: auf Schreckplatten erreichen.The liquid scrap melt is poured into granules In the known way, the easiest and most economical way to run in my coolant, mainly in water. But it can also other Cooling baths such as C51 or metal baths are used. You can also see the formation of granules by quenching the steel melt and letting it run into a jet of air or by pouring off the melt: reach on shock plates.

In einem aus 2o bis 30'1a schwedischen Rohschienen, 2o bis 30'/o frisch entfallenem Eigenschrott und im Rest aus reinem Eisen-und Stahlschrott bestehenden Einsatz konnte gemäß dem Verfahren nach der Erfindung der gesamte Anteil an schwedischen Rohschienen durch Granalien .ersetzt werden, die durch das Umschmelzen von Kaufschrott in einem Gra:phittfegel und nachträgliches Abschrecken der Schmelze in Wasser bergestellt wurden.In one of 2o to 30'1a Swedish raw rails, 2o to 30% fresh eliminated own scrap and the remainder consisting of pure iron and steel scrap According to the method according to the invention, the entire share of Swedish could be used Raw rails are replaced by granules, which are obtained by remelting purchased scrap presented in a graphite cone and subsequent quenching of the melt in water became.

Claims (1)

PATIi1TA\SP1tUCH: Die Verwendung von in Graphittiegeln umgeschmolzenem und zu Granalien vergossenem minderwertigem, an sich für den folgenden Zweck. ungeeignetem Stahlschrott zur Herstellung von hochwertigem Tiegelgußstahl.PATIi1TA \ SP1tUCH: The use of remelted in graphite crucibles and inferior cast into granules, in itself for the following purpose. unsuitable Steel scrap for the production of high quality crucible cast steel.
DEV34108D 1937-08-20 1937-08-20 Process for the production of high quality crucible cast steel Expired DE730886C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV34108D DE730886C (en) 1937-08-20 1937-08-20 Process for the production of high quality crucible cast steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV34108D DE730886C (en) 1937-08-20 1937-08-20 Process for the production of high quality crucible cast steel

Publications (1)

Publication Number Publication Date
DE730886C true DE730886C (en) 1943-01-28

Family

ID=7588633

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV34108D Expired DE730886C (en) 1937-08-20 1937-08-20 Process for the production of high quality crucible cast steel

Country Status (1)

Country Link
DE (1) DE730886C (en)

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