DE763791C - Process for the production of iron building beams and moldings - Google Patents
Process for the production of iron building beams and moldingsInfo
- 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
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)
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)
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 |
-
1938
- 1938-11-08 DE DEG98913D patent/DE763791C/en not_active Expired
Patent Citations (5)
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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