DE974847C - Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting - Google Patents

Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting

Info

Publication number
DE974847C
DE974847C DEG11127A DEG0011127A DE974847C DE 974847 C DE974847 C DE 974847C DE G11127 A DEG11127 A DE G11127A DE G0011127 A DEG0011127 A DE G0011127A DE 974847 C DE974847 C DE 974847C
Authority
DE
Germany
Prior art keywords
production
strip
steel strip
subjected
application
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
DEG11127A
Other languages
German (de)
Inventor
Wilhelm Dr-Ing Stich
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 DEG11127A priority Critical patent/DE974847C/en
Priority to DEG16192A priority patent/DE974980C/en
Application granted granted Critical
Publication of DE974847C publication Critical patent/DE974847C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Description

Es ist bereits vorgeschlagen worden, gehört aber nicht zum Stand der Technik, Bandstahl frühzeitig nach seinem Austritt aus der Fertigwalze — möglichst unmittelbar vom Austritt aus dem Fertigkaliber an — durch große Mengen rasch an ihn herangeführter Luft so schnell abzukühlen, daß er ein feinkörniges, hochwertiges Gefüge erhält, und das so beschaffene, noch warm aufgehaspelte Band unter Berücksichtigung seiner über die Länge vorliegenden Temperatur einer ausgleichenden und hinsichtlich Beginn, Temperatur und Dauer zur Erzielung eines gewünschten Gefüges von gleichmäßiger Beschaffenheit entsprechend geregelten Warmbehandlung zu unterwerfen.It has already been suggested but is not part of the state of the art, strip steel early on after its exit from the finishing roll - as directly as possible from the exit from the finishing pass on - to be cooled so quickly by large amounts of air quickly brought to him that he a fine-grained, high-quality structure is obtained, and the thus created, still warm reeled tape taking into account its temperature over the length of a compensatory and in terms of start, temperature and duration to achieve a desired structure of more uniform Subject to the quality of the appropriately regulated heat treatment.

Bei der Herstellung von Bandstahl mit einer Festigkeit von mehr als 140 kg/mm2 durch Kaltvergüten wird erfindungsgemäß die Kombination einer Wärmebehandlung des oberhalb A3 endwarmgewalzten Bandes mit einer bestimmten nachfolgenden Kaltverformung durchgeführt. Die Wärmebehandlung geschieht dabei in der Weise, daß das gewalzte Band aus der Walzhitze unmittelbar vorn Austritt aus dem Fertigkaliber an etwa bis zur Haspel einer schroffen Abschreckung unterzogen wird, die erst bei einer Außentemperatur des Bandes zwischen dem Ar3-Punkt und der tiefsten, das Haspeln noch zulassenden Außentemperatur abgebrochen wird, worauf der Bandstahl unter Fortsetzung der Abkühlung gehaspelt und der erhaltene Ring sogleich einer ausgleichenden Wärmebehandlung bei einer Temperatur zwischen etwa 350 und 500° C unterworfen wird, während dieIn the manufacture of steel strip having a strength of more than 140 kg / mm 2 by cold annealing the combination of a heat treatment of the above A is according to the invention carried out for 3 endwarmgewalzten band with a certain subsequent cold deformation. The heat treatment takes place in such a way that the rolled strip from the rolling heat is subjected to a sharp quenching immediately before the exit from the finished pass up to about the reel, which only occurs when the outside temperature of the strip is between the Ar 3 point and the lowest point, the Coiling is canceled at the outside temperature that is still permissible, whereupon the steel strip is reeled while cooling continues and the ring obtained is immediately subjected to a balancing heat treatment at a temperature between about 350 and 500 ° C, while the

109 575/23109 575/23

nachfolgende Kaltverformung ohne Zwischenglühen oder mindestens ohne Zwischenglühen bei Temperaturen oberhalb 6oo° C vorgenommen wird.subsequent cold deformation without intermediate annealing or at least without intermediate annealing at temperatures is carried out above 600 ° C.

Mit diesem Verfahren ist es ohne Schwierigkeit möglich, Festigkeiten von 140 kg/mm2 und weit darüber zu erreichen, indem sehr große Gesamtquerschnittsverminderungen vorgenommen werden, ohne daß das Band beim Kaltwalzen bricht oder an den Rändern einreißt.With this process it is possible without difficulty to achieve strengths of 140 kg / mm 2 and much more by making very large total cross-sectional reductions without the strip breaking during cold rolling or tearing at the edges.

Erfindungsgemäß werden die vorher beschriebenen Maßnahmen dazu benutzt, Bandstahl verschiedener Zusammensetzung, unlegiert oder legiert, durch Kaltwalzen auf eine Festigkeit über 140 kg/mm2 zu bringen. Ein solcher Bandstahl, wie er beispielsweise für federnde Körper (gehärteter Federbandstahl), für Holz- und Metallsägenband sowie für ähnliche Verwendungszwecke verarbeitet wird, wurde bisher in der Regel nur durch Härten und gegebenenfalls diesem noch folgendes Anlassen hergestellt. Da das erfindungsgemäße Verfahren hingegen einfacher ist und der nach ihm hergestellte Bandstahl eine ausgezeichnete Verarbeitung durch Schneiden, Stanzen, Biegen und Pressen gestattet, ist der technische Fortschritt gegeben. According to the invention, the measures described above are used to bring steel strip of various compositions, unalloyed or alloyed, to a strength of more than 140 kg / mm 2 by cold rolling. Such a steel band, as it is processed, for example, for resilient bodies (hardened spring band steel), for wood and metal saw bands as well as for similar purposes, has so far only been produced as a rule by hardening and possibly subsequent tempering. However, since the method according to the invention is simpler and the steel strip produced according to it allows excellent processing by cutting, punching, bending and pressing, the technical progress is given.

Claims (4)

Patentansprüche:Patent claims: i. Verfahren zur Herstellung von Bandstahl mit einer Festigkeit von mehr als 140 kg/mm2 durch Kaltvergüten, gekennzeichnet durch die Kombination einer Wärmebehandlung des oberhalb A3 endwarmgewalzten Bandes in der Weise, daß das gewalzte Band aus der Walzhitze unmittelbar vom Austritt aus dem Fertigkaliber an etwa bis zur Haspel einer schroffen Abschreckung unterzogen wird, die erst bei einer Außentemperatur des Bandes zwischen dem Ar3-Punkt und der tiefsten, das Haspeln noch zulassenden Außentemperatur abgebrochen wird, worauf der Bandstahl unter Fortsetzung der Abkühlung gehaspelt und der erhaltene Ring sogleich einer ausgleichenden Wärmebehandlung bei einer Temperatur zwischen etwa 350 und 5000 C unterworfen wird — mit einer nachfolgenden Kaltverformung ohne Zwischenglühen oder mindestens ohne Zwischenglühen bei Temperaturen oberhalb 6oo° C.i. Process for the production of steel strip with a strength of more than 140 kg / mm 2 by cold quenching and tempering, characterized by the combination of a heat treatment of the strip hot-rolled above A 3 in such a way that the rolled strip from the rolling heat immediately from the exit from the finished pass to about until the reel is subjected to a sharp quenching, which is only interrupted when the outside temperature of the strip is between the Ar 3 point and the lowest outside temperature still permissible for reeling, whereupon the steel strip is reeled while cooling continues and the ring obtained is immediately subjected to a balancing heat treatment is subjected at a temperature between about 350 and 500 0 C - with a subsequent cold deformation without intermediate annealing or at least without intermediate annealing at temperatures above 600 ° C. 2. Anwendung des Verfahrens nach Anspruch ι zur Herstellung von sogenanntem gehärtetem Federbandstahl, wie er beispielsweise für federnde Körper Verwendung findet.2. Application of the method according to claim ι for the production of so-called hardened Spring band steel, as it is used for example for resilient bodies. 3. Anwendung des Verfahrens nach Anspruch ι zur Herstellung von Bandstahl, welcher zu Holzbandsägen und ähnlichen Geräten verarbeitet wird.3. Application of the method according to claim ι for the production of steel strip, which is processed into wooden band saws and similar devices. 4. Anwendung des Verfahrens nach Anspruch ι zur Herstellung von Bandstahl, welcher zu Metallsägen und ähnlichen Geräten verarbeitet wird.4. Application of the method according to claim ι for the production of steel strip, which is processed into hacksaws and similar devices. In Betracht gezogene Druckschriften: »Stahl und Eisen«, 1942, S. 1067 bis 1073; Pomp, »Stahldraht«, 2.Auflage, 1952, S.218ft".; Puppe, »Walzwerkswesen«, 3. Band, 1939, S. 508/509.Considered publications: "Stahl und Eisen", 1942, pp. 1067 to 1073; Pomp, »Stahldraht«, 2nd edition, 1952, p.218ft ".; Doll, "Rolling Mills", Volume 3, 1939, pp. 508/509. © IO& 575/2Ϊ 5.61© IO & 575 / 2Ϊ 5.61
DEG11127A 1953-03-06 1953-03-06 Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting Expired DE974847C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEG11127A DE974847C (en) 1953-03-06 1953-03-06 Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting
DEG16192A DE974980C (en) 1953-03-06 1955-01-08 Process for the production of strip steel of the highest strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG11127A DE974847C (en) 1953-03-06 1953-03-06 Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting

Publications (1)

Publication Number Publication Date
DE974847C true DE974847C (en) 1961-05-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEG11127A Expired DE974847C (en) 1953-03-06 1953-03-06 Process for the production of steel strip with a strength of more than 140 kg / mm by means of cold casting

Country Status (1)

Country Link
DE (1) DE974847C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458999B1 (en) * 1965-06-16 1969-09-11 Hoesch Ag Process for the production of cold strips from hardenable carbon steels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458999B1 (en) * 1965-06-16 1969-09-11 Hoesch Ag Process for the production of cold strips from hardenable carbon steels

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