DE763791C - Process for the production of iron building beams and moldings - Google Patents

Process for the production of iron building beams and moldings

Info

Publication number
DE763791C
DE763791C DEG98913D DEG0098913D DE763791C DE 763791 C DE763791 C DE 763791C DE G98913 D DEG98913 D DE G98913D DE G0098913 D DEG0098913 D DE G0098913D DE 763791 C DE763791 C DE 763791C
Authority
DE
Germany
Prior art keywords
iron
production
moldings
final pass
building beams
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
DEG98913D
Other languages
German (de)
Inventor
Kurt Jung
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.)
ALBERT GROTE DR
Original Assignee
ALBERT GROTE DR
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 ALBERT GROTE DR filed Critical ALBERT GROTE DR
Priority to DEG98913D priority Critical patent/DE763791C/en
Application granted granted Critical
Publication of DE763791C publication Critical patent/DE763791C/en
Expired legal-status Critical Current

Links

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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment

Landscapes

  • 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)
  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)

Description

Verfahren zum Herstellen von eisernen Bauträgern und. Formeisen Ein beträchtlicher Teil der Eisenerzeugung wird für Bauträger und Formeisen in Anspruch genommen.Method of making iron girders and. Forming iron a A considerable part of the iron production is used for building contractors and for cast iron taken.

Durch die vorliegende Erfindung wird ein Weg gewiesen, mit geringen zusätzlichen Erzeugungskosten eine erhebliche Werkstoffersparnis herbeizuführen.The present invention shows a way with little additional production costs to bring about considerable material savings.

Diese wird dadurch erreicht, daß durch die Lenkung des Walzverfahrens die Tragfähigkeit derTräger, insbesondere ihreKnickfestigkeit, erheblich, und zwar bis auf das Dreifache erhöht wird. Hieraus ergibt sich, daß man bei gleichem Bauvorhaben mit viel schwächeren Profilen als bisher auskommt und dementsprechend eine geringere Gewichtsmenge an Eisen benötigt wird.This is achieved by steering the rolling process the load-bearing capacity of the girders, in particular their buckling strength, is considerable is increased up to three times. From this it follows that one with the same construction project gets by with much weaker profiles than before and accordingly a lower one Weight amount of iron is required.

Nach der Erfindung wird der an sich bekannte Warmwalzvorgang der Bauträger und des Formeisens einige Stiche vor dem Fertigstich unterbrochen und der Walzstab unter den AA-Punkt abgekühlt und in diesem Temperaturgebiet, aber oberhalb der Raumtemperatur, fertiggewalzt. Diese letzten Stiche und der Fertigstich bewirken dann eine sehr hohe Verfestigung des Werkstoffs, die nicht mehr, wie beim warmen Walzstab, durch Wärmewirkung ausgeglichen wird, sondern dauernd erhalten bleibt. Betriebsversuche haben ergeben, daß die Tragfähigkeit so bearbeiteter Träger bis dreimal so groß ist als bei «-arm fertiggewalzten Trägern. Die Arbeitsgänge des Vor- und.Fertigwalzens können im gleichen Walzgerüst, aber auch in getrennten Vor- und Fertiggerüsten erfolgen.According to the invention, the hot rolling process known per se becomes the building contractor and the forming iron interrupted a few passes before the final pass and the roller bar cooled below the AA point and in this temperature range, but above room temperature, finish-rolled. These last stitches and the final stitch then make a great difference high hardening of the material, which is no longer, as in the case of warm rolled rod, by Heat effect is compensated, but is permanently maintained. Operational trials have shown that the load-bearing capacity of such machined beams is up to three times as great is than with -arm finish-rolled beams. The operations of roughing and finishing rolling can be done in the same roll stand, but also in separate roughing and finishing stands.

Wesentlich ist bei dem den Gegenstand der Erfindung bildenden Verfahren die Durchführung der letzten Stiche in einem wesentlich verringerten, aber über Raumtemperatur liegenden Temperaturbereich. Dadurch unterscheidet sich das erfindungsgemäße Verfahren von dem an sich bekannten Kaltwalzverfahren.This is essential in the process forming the subject of the invention performing the final stitches in a much diminished but over Room temperature temperature range. This differs from the one according to the invention Process from the per se known cold rolling process.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen von eisernen Bauträgern und Formeisen, dadurch gekennzeichnet, daß der Warmwalzvorgang einige Stiche vor dem Fertigstich unterbrochen wird und daß die letzten Stiche und der Fertigstich nach Abkühlung unter den AA-Punkt, jedoch über Raumtemperatur, durchgeführt werden. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Deutsche Patentschriften \ r. 56S ,2 12, 627 169, 643 -197 österreichische Patentschrift \r. 130 gor USA.-Patentschrift N r. i ogo i 15; Zeitschrift für Metallkunde, 1920, S.157/58; Zeitschrift Heat Treating and Forging, 1931,S.40.PATENT CLAIM: Process for producing iron building girders and shaped iron, characterized in that the hot rolling process is interrupted a few passes before the final pass and that the last passes and the final pass are carried out after cooling below the AA point, but above room temperature. To distinguish the subject matter of the invention from the state of the art, the following publications were taken into account in the granting procedure: German Patent Specifications \ r. 56S, 2 12, 627 169, 643 -197 Austrian patent specification \ r. 130 gor U.S. Patent No. i ogo i 1 5; Zeitschrift für Metallkunde, 1920, p.157 / 58; Heat Treating and Forging Journal, 1931, p.40.
DEG98913D 1938-11-08 1938-11-08 Process for the production of iron building beams and moldings Expired DE763791C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG98913D DE763791C (en) 1938-11-08 1938-11-08 Process for the production of iron building beams and moldings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG98913D DE763791C (en) 1938-11-08 1938-11-08 Process for the production of iron building beams and moldings

Publications (1)

Publication Number Publication Date
DE763791C true DE763791C (en) 1954-06-28

Family

ID=7140971

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG98913D Expired DE763791C (en) 1938-11-08 1938-11-08 Process for the production of iron building beams and moldings

Country Status (1)

Country Link
DE (1) DE763791C (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090115A (en) * 1913-01-16 1914-03-10 Internat Metal Products Co Method of working pure iron.
AT130901B (en) * 1928-07-09 1932-12-27 Otto Dr Ing Foeppl Process to increase the resistance of metal components to vibration loads.
DE568212C (en) * 1926-12-07 1933-01-16 Hans Meyer Dr Ing Process for the aftertreatment of cold-stressed mild mild steel
DE627169C (en) * 1927-08-10 1936-03-28 Herman Johan Van Royen Dr Process for the production of workpieces made of iron and steel that are insensitive to cold scalding, blue cracking and aging
DE643497C (en) * 1933-10-23 1937-04-09 Ernst Bohler Process for the production of bar and profile iron, in particular of concrete iron bars

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090115A (en) * 1913-01-16 1914-03-10 Internat Metal Products Co Method of working pure iron.
DE568212C (en) * 1926-12-07 1933-01-16 Hans Meyer Dr Ing Process for the aftertreatment of cold-stressed mild mild steel
DE627169C (en) * 1927-08-10 1936-03-28 Herman Johan Van Royen Dr Process for the production of workpieces made of iron and steel that are insensitive to cold scalding, blue cracking and aging
AT130901B (en) * 1928-07-09 1932-12-27 Otto Dr Ing Foeppl Process to increase the resistance of metal components to vibration loads.
DE643497C (en) * 1933-10-23 1937-04-09 Ernst Bohler Process for the production of bar and profile iron, in particular of concrete iron bars

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