DE1230821B - Process for consolidating rod-shaped and wire-shaped steels - Google Patents
Process for consolidating rod-shaped and wire-shaped steelsInfo
- Publication number
- DE1230821B DE1230821B DEH31313A DEH0031313A DE1230821B DE 1230821 B DE1230821 B DE 1230821B DE H31313 A DEH31313 A DE H31313A DE H0031313 A DEH0031313 A DE H0031313A DE 1230821 B DE1230821 B DE 1230821B
- Authority
- DE
- Germany
- Prior art keywords
- steels
- shaped
- rod
- wire
- deformation
- 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.)
- Pending
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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
- B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Reinforcement Elements For Buildings (AREA)
- Heat Treatment Of Steel (AREA)
Description
Verfahren zum Verfestigen von stab- und drahtförmigen Stählen Zusatz zur Anmeldung: S 50132 VI a/18 c - Auslegeschrift 1224 762 Gegenstand der Patentanmeldung S 50132 VI a/18 c ist ein Verfahren zum Verfestigen von stab- und drahtfönnigen Stählen, insbesondere von Bewehrungsstäben des Stahlbetonbaues.Method for strengthening rod-shaped and wire-shaped steels Addition to application: S 50132 VI a / 18 c - Auslegeschrift 1 224 762 The subject of patent application S 50132 VI a / 18 c is a method for strengthening rod-shaped and wire-shaped steels, in particular reinforcing bars of reinforced concrete construction.
Die zu lösende Aufgabe nach dem Hauptpatent ist darin zu sehen, Stähle normaler Handelsgüte in ihren Festigkeitseigenschaften so weit zu verbessern, daß sie als Bewehrungsstähle im Stahlbetonbau vorteilhaft verwendet werden können, ohne daß es dazu aufwendiger Einrichtungen oder umständlicher Verfahrensschritte bedarf und ohne daß der Werkstoff nachteilig beeinflußt wird. Dabei kann im gleichen Arbeitsgang die erforderliche Oberflächenstruktur vorgesehen werden. Diese Aufgabe nach dem Hauptpatent wird dadurch gelöst, daß in mindestens einem Rollvorgang sowohl das Abbiegen als auch das Profilieren durchgeführt wird, um das Material bis zu einem Höchstwert zu verfestigen und außerdem unerwartete Dehnwerte zu erreichen, denn die so im Verlauf ihrer Oberfläche verformten Zonen werden über die gesamte Länge gestaucht und gereckt, wobei der Deformationsgrad und damit auch die Verfestigung entsprechend den auftretenden Schubspannungen von der neutralen Phase nach dem Umfang hin zunehmen.The task to be solved according to the main patent is to be seen in steels normal commercial quality in their strength properties to improve so much that they can be used advantageously as reinforcing steel in reinforced concrete construction without that it requires complex facilities or cumbersome process steps and without the material being adversely affected. You can do this in the same operation the required surface structure must be provided. This task after the The main patent is achieved in that both the Bending as well as profiling is done to the material up to one To consolidate the maximum value and also to achieve unexpected elongation values, because the zones deformed in this way in the course of their surface are over the entire length compressed and stretched, with the degree of deformation and thus also the solidification according to the occurring shear stresses from the neutral phase to the circumference to increase.
Aufgabe dieser Erfindung ist es, das Verfahren nach dem Hauptpatent zu verbessern. Es hat sich nämlich ergeben, daß zur Verfestigung mit den im Hauptpatent angegebenen Mitteln besonders Stäbe aus alterungsfähigem Stahl geeignet sind, z. B. aus Thomasstahl mit einem bei etwa 0,0111/o liegenden Stickstoffgehalt. Bei solchen Stählen ist unmittelbar nach der Biegeverformung zwar noch keine über den Einfluß der Kaltverformung hinausgehende Verfestigung festzustellen. Eine beachtliche Verfestigung tritt jedoch durch mit Hilfe der Biegeverfonnung eingeleitete Alterung ein. Sie erlangt das für hochbelastbare Beton-Bewehrungseinlagen erforderliche Maß für Raumtemperatur nach einer von der jeweils verwendeten Stahlsorte abhängigen, nach Tagen, Wochen oder Monaten bemessenen Lagerzeit. Die Lagerzeit läßt sich durch Erwärmen des verfestigten Stahles wesentlich abkürzen. Die gewünschte Alterungsverfestigung, die bei einem bestimmten Stahl unter Raumtemperatur etwa 2 Wochen dauert, tritt bei Erwärmen auf etwa 150' C z. B. schon nach wenigen Stunden ein. Wenn während der Kaltverformung so verfahren wird, daß der Stahl sich auf eine solche Temperatur erwärmt, kann auf eine besondere Lagerzeit verzichtet werden.The object of this invention is to improve the method according to the main patent. It has been found that rods made of aging steel are particularly suitable for solidification with the means specified in the main patent, eg. B. from Thomasstahl with a nitrogen content of about 0.0111 / o. In the case of steels of this type, no hardening beyond the influence of cold deformation can be determined immediately after the bending deformation. However, considerable hardening occurs due to aging initiated with the help of bending deformation. It achieves the required room temperature for heavy-duty concrete reinforcement inserts after a storage time that depends on the type of steel used and is measured in days, weeks or months. The storage time can be shortened considerably by heating the solidified steel. The desired aging hardening, which for a given steel takes about 2 weeks below room temperature, occurs when heated to about 150 ° C, e.g. B. after a few hours. If the procedure during cold forming is such that the steel is heated to such a temperature, a special storage time can be dispensed with.
Ausgelöst wird die gewünschte Wirkung dadurch, daß die Verformung mit einem Biegeradius durchgeführt wird, der kleiner als der sechsfache Stab-oder Drahtdurchmesser ist; er soll vorzugsweise das Vierfache dieses Durchmessers betragen, wobei die Anwendung dieser Verformung auf alterungsfähige Stähle durchgeführt werden soll und gegebenenfalls die Einschaltung einer den Eigenschaften solcher Stähle angepaßten Legierung zwischen Verforinung und bestimmungsgemäßer Verwendung des Stabes oder Drahtes erfolgen kann.The desired effect is triggered by the deformation is performed with a bending radius that is less than six times the rod or Wire diameter is; it should preferably be four times this diameter, the application of this deformation to aging steels being carried out should and, if necessary, the inclusion of one of the properties of such steels adapted alloy between deformation and intended use of the Rod or wire can be done.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH31313A DE1230821B (en) | 1957-10-08 | 1957-10-08 | Process for consolidating rod-shaped and wire-shaped steels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH31313A DE1230821B (en) | 1957-10-08 | 1957-10-08 | Process for consolidating rod-shaped and wire-shaped steels |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1230821B true DE1230821B (en) | 1966-12-22 |
Family
ID=7151599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH31313A Pending DE1230821B (en) | 1957-10-08 | 1957-10-08 | Process for consolidating rod-shaped and wire-shaped steels |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1230821B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR916050A (en) * | 1944-10-30 | 1946-11-25 | Cold-treated reinforcing steel, and its manufacturing process | |
AT180283B (en) * | 1950-03-06 | 1954-11-25 | Franz Dipl Ing Koehler | Process for the production of high-quality reinforcement for concrete |
FR1092281A (en) * | 1953-05-23 | 1955-04-20 | Filter for drain plugs in sanitary ware such as sinks or bathtubs | |
CH315389A (en) * | 1952-05-20 | 1956-08-15 | Kazinczy Gabor Dr Ing De | Process for the manufacture of cold worked steel bars, e.g. B. Reinforcing bars, and steel bar produced by this method |
-
1957
- 1957-10-08 DE DEH31313A patent/DE1230821B/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR916050A (en) * | 1944-10-30 | 1946-11-25 | Cold-treated reinforcing steel, and its manufacturing process | |
AT180283B (en) * | 1950-03-06 | 1954-11-25 | Franz Dipl Ing Koehler | Process for the production of high-quality reinforcement for concrete |
CH315389A (en) * | 1952-05-20 | 1956-08-15 | Kazinczy Gabor Dr Ing De | Process for the manufacture of cold worked steel bars, e.g. B. Reinforcing bars, and steel bar produced by this method |
FR1092281A (en) * | 1953-05-23 | 1955-04-20 | Filter for drain plugs in sanitary ware such as sinks or bathtubs |
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