EP0132249B1 - Procédé et dispositifs pour la fabrication d'armatures à béton en acier sur train à fil à grande vitesse - Google Patents

Procédé et dispositifs pour la fabrication d'armatures à béton en acier sur train à fil à grande vitesse Download PDF

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Publication number
EP0132249B1
EP0132249B1 EP84870100A EP84870100A EP0132249B1 EP 0132249 B1 EP0132249 B1 EP 0132249B1 EP 84870100 A EP84870100 A EP 84870100A EP 84870100 A EP84870100 A EP 84870100A EP 0132249 B1 EP0132249 B1 EP 0132249B1
Authority
EP
European Patent Office
Prior art keywords
bar
cooling
mill
finishing mill
quenching
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 - Lifetime
Application number
EP84870100A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0132249A2 (fr
EP0132249A3 (en
Inventor
Marios Economopoulos
Pierre Simon
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19730123&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0132249(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Priority to AT84870100T priority Critical patent/ATE62837T1/de
Publication of EP0132249A2 publication Critical patent/EP0132249A2/fr
Publication of EP0132249A3 publication Critical patent/EP0132249A3/fr
Application granted granted Critical
Publication of EP0132249B1 publication Critical patent/EP0132249B1/fr
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Classifications

    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B21D11/15—Reinforcing rods for concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets

Definitions

  • the subject of the present invention is a method and devices for the manufacture, on a high-speed wire train, of steel concrete reinforcements, having both a high yield strength and a high ductility, as well as, if one desired, good weldability; this manufacturing is carried out by means of an abrupt cooling treatment applied during or immediately after rolling.
  • the first consists in incorporating microalloy elements, such as niobium or vanadium, into the steel. This technique is however expensive, because of the price of the alloying elements.
  • the second means is to increase the elastic limit of the steel, by a cold deformation operation, in particular by torsion, of the bar.
  • the gain in elasticity limit is achieved at the expense of the elongation.
  • the process of the present invention takes place among the recent technique consisting in applying to hot-rolled concrete reinforcements, during or immediately after rolling, a sudden cooling, limited in time, so as to produce in the bar a surface layer of martensite; this, "quenching" is followed by cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
  • a sudden cooling limited in time, so as to produce in the bar a surface layer of martensite; this, "quenching” is followed by cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
  • Such judicious limitation of the duration of the abrupt cooling can be ensured by targeting a determined temperature at the core, at the end of the abrupt cooling phase; practically, the conduct of such an operation can be ensured by observing the temperature of the surface at the location of the bar where there is a heating due to the contribution of calories from the heart.
  • the trainer is normally capable of exerting a traction of value T, but for the rolling operation to take place correctly, the traction X exerted in the wire downstream of the finishing block must be greater than a minimum value , suitable for driving the wire out of the block.
  • the traction X at the outlet of the block, is in reality the difference between the traction force T of the driver and the braking force F applied to the wire mainly during the passage of the latter in the cooling device.
  • the experiments carried out have made it possible to establish that the braking force F was a function K of the length L of the cooling device, the coefficient K being itself a function of the nature of the cooling device, of the fluid flow and the relative speed of the wire relative to the coolant.
  • the subject of the present invention is an improved method and device for applying to the moving wire at high speed the quenching / self-coming treatment capable of providing it with a combination, considered to be optimal, of elastic limit and elongation.
  • the object of the present invention is to provide a method and a device for the manufacture of a steel concrete reinforcing bar on a high-speed wire train, which make it possible to apply a quenching treatment to the bar.
  • self-income capable of ensuring a combination, considered optimal, of elastic limit and elongation, while avoiding the aforementioned drawbacks resulting from the braking to which the bar is subjected during its intense cooling.
  • a method for manufacturing a steel concrete reinforcing bar on a high speed wire train comprising a finishing block through which the bar is passed, in which the front bar is cooled and / or during its passage through said finishing block and then subjecting said bar, after its passage through said finishing block, to a quenching and self-tempering treatment from its end of rolling temperature, the bar being subjected to a tensile force in the direction of travel, is characterized in that during the cooling effected before and / or during its passage through said finishing block, the bar is cooled to a rolling end temperature of between 1050 ° C and 950 ° C.
  • This cooling applied upstream of the finishing block and / or at the level of this block is intended to bring the temperature of the bar at the outlet of the block below what it is normally, that is to say when the 'Cooling is applied to the block only to obtain, for example, a substantially constant temperature in the block.
  • This additional cooling treatment, upstream or at the level of the block, has the result of increasing the stiffness of the bar at the exit of the block, therefore reducing the minimum traction necessary for the smooth running of the operation; in addition, the minimum length of the cooling ramp necessary for quenching will be shortened, which will decrease the value of the braking force F.
  • the indicated decrease in the end of rolling temperature from 1050 ° C to 'at 950 ° C makes it possible to reduce the quenching length L of the bar by 30%.
  • a cooling fluid consisting of a water / air mixture, more compressible and therefore less braking than the water usually used, is used for said quenching and self-coming treatment; under these conditions, if the coefficient K actually decreases, the length L necessary for the quenching operation must however be increased, since the specific power of the cooling is lowered; it was however observed that the product KxL, that is to say the braking force, was ultimately lower.
  • the power available in the trainer can be increased. It is also possible, separately or simultaneously, to apply to the bar a tensile force equal to or greater than the braking force to which the bar is subjected during said quenching and self-tempering treatment.
  • a device for the manufacture of a steel concrete reinforcing bar on a high-speed wire train comprising an intermediate block and a finishing block, with a bar cooling device situated between said intermediate block and said finishing block and in which said finishing block is successively followed by means of intense cooling of the bar and by means of driving the bar in movement, characterized in that said drive means comprise several pairs of drive rollers offset relative to each other, alternately up and down, to impose on the bar a wavy path.
  • Said means for intense cooling of the bar may comprise air blowing channels opening into an annular slot ensuring the injection of water inside the barrel of intense cooling of the bar.
  • FIG. 1 the elements which constitute the usual installation for the end of rolling are shown in solid lines: in the direction of flow of the wire, the intermediate train is encountered in 1, in 2, the finishing block, in 3, the intense cooling device or "quenching gun", and in 4, the roller drive; between the finisher 2 and the barrel 3, the traction X on the wire is equal to the difference between the force T exerted by the driver 4 and the braking F undergone by the wire mainly in the barrel 3.
  • Figure II is a longitudinal section of an intense water-air cooling device which offers the characteristic of low internal braking, due to the compressibility of the fluid which circulates in this device.
  • air blowing channels can be distinguished in the annular slot 9 for injection into the interior 10 of the barrel; the water-air mixture is injected in the direction of flow of the wire.
  • this device is equipped with means for adjusting its cooling power, for example to modify the ratio between the water and air flow rates, or even the temperature of the water.
  • the method according to the invention can be used to manufacture both smooth and crimped reinforcements, participating actively or passively in the strength of the concrete structure, possibly used in truss assemblies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Wire Processing (AREA)
EP84870100A 1983-07-18 1984-07-10 Procédé et dispositifs pour la fabrication d'armatures à béton en acier sur train à fil à grande vitesse Expired - Lifetime EP0132249B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84870100T ATE62837T1 (de) 1983-07-18 1984-07-10 Verfahren und vorrichtung zur herstellung von betonbewehrungsstaeben auf einer hochgeschwindigkeitsdrahtstrasse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84922A LU84922A1 (fr) 1983-07-18 1983-07-18 Procede et dispositifs de fabrication d'armatures a beton en acier sur train a fil a grande vitesse
LU84922 1983-07-18

Publications (3)

Publication Number Publication Date
EP0132249A2 EP0132249A2 (fr) 1985-01-23
EP0132249A3 EP0132249A3 (en) 1987-10-14
EP0132249B1 true EP0132249B1 (fr) 1991-04-24

Family

ID=19730123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870100A Expired - Lifetime EP0132249B1 (fr) 1983-07-18 1984-07-10 Procédé et dispositifs pour la fabrication d'armatures à béton en acier sur train à fil à grande vitesse

Country Status (12)

Country Link
US (1) US4625532A (enrdf_load_stackoverflow)
EP (1) EP0132249B1 (enrdf_load_stackoverflow)
JP (1) JPS60155623A (enrdf_load_stackoverflow)
KR (1) KR920000232B1 (enrdf_load_stackoverflow)
AT (1) ATE62837T1 (enrdf_load_stackoverflow)
AU (1) AU580960B2 (enrdf_load_stackoverflow)
CA (1) CA1245080A (enrdf_load_stackoverflow)
DE (1) DE3484488D1 (enrdf_load_stackoverflow)
ES (1) ES8505726A1 (enrdf_load_stackoverflow)
GB (1) GB2143452B (enrdf_load_stackoverflow)
LU (1) LU84922A1 (enrdf_load_stackoverflow)
ZA (1) ZA845522B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518925A1 (de) * 1985-05-25 1986-11-27 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren zum kontrollierten stab- und drahtwalzen legierter staehle
EP0312843B1 (de) * 1987-10-22 1992-12-16 Sms Schloemann-Siemag Aktiengesellschaft Verfahren zur Wärmeübertragung und dessen Anwendung zum temperaturkontrollierten Kühlen von Walzgut
IT1235120B (it) * 1989-07-10 1992-06-18 Danieli Off Mecc Procedimento di laminazione veloce e sistema per la laminazione veloce.
IT1235119B (it) * 1989-07-10 1992-06-18 Danieli Off Mecc Gabbia di laminazione con rulli a sbalzo multipli per laminazione veloce.
DE4207296A1 (de) * 1992-03-07 1993-09-09 Schloemann Siemag Ag Feinstahl/drahtstrasse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222257A (en) * 1977-04-21 1980-09-16 Hamburger Stahlwerke Gmbh Method of manufacturing rolled wire rod

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756169A (en) * 1950-10-19 1956-07-24 John A Roebling S Sons Corp Method of heat treating hot rolled steel rods
DE1777431A1 (de) * 1966-04-29 1975-01-09 Demag Ag Trommel-wickelvorrichtung
GB1226416A (enrdf_load_stackoverflow) * 1968-07-10 1971-03-31
DE2102800B2 (de) * 1971-01-21 1973-04-05 Ukrain'skij gosudarstwennij institut po projektirowaniju metallurgitscheskich sawodow UKRGIPROMES, Dnepropetrowsk (Sowjetunion) Anlage zur thermischen behandlung von walzerzeugnissen im kuehlmittelstrom
JPS5110917B2 (enrdf_load_stackoverflow) * 1972-06-16 1976-04-07
AR206397A1 (es) * 1973-02-22 1976-07-23 Hudswell Morrice Ltd Aparato para hacer una zanja en el suelo
CA1028535A (en) * 1973-11-15 1978-03-28 Bethlehem Steel Corporation Method for controlling the temperature of steel during hot-rolling on a continuous hot-rolling mill
DE2437684C2 (de) * 1974-08-05 1982-09-02 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzwerk zur Herstellung von Draht und Rippenstahl
IT1090143B (it) * 1975-01-29 1985-06-18 Centre Rech Metallurgique Procedimento per fabbricare dei prodotti laminati di acciaio
BE837884A (fr) * 1976-01-23 1976-05-14 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement des profiles metalliques
BE867299A (fr) * 1978-05-19 1978-09-18 Centre Rech Metallurgique Perfectionnements aux dispositifs de refroidissement de produits metalliques allonges
FR2458499A1 (fr) * 1979-06-07 1981-01-02 Siderurgie Fse Inst Rech Dispositif d'entrainement de produits longs en defilement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222257A (en) * 1977-04-21 1980-09-16 Hamburger Stahlwerke Gmbh Method of manufacturing rolled wire rod

Also Published As

Publication number Publication date
GB2143452A (en) 1985-02-13
AU580960B2 (en) 1989-02-09
US4625532A (en) 1986-12-02
ATE62837T1 (de) 1991-05-15
ES534386A0 (es) 1985-06-01
GB2143452B (en) 1987-07-08
ES8505726A1 (es) 1985-06-01
DE3484488D1 (de) 1991-05-29
CA1245080A (en) 1988-11-22
AU3077284A (en) 1985-01-24
GB8418285D0 (en) 1984-08-22
LU84922A1 (fr) 1985-04-17
KR850001037A (ko) 1985-03-14
EP0132249A2 (fr) 1985-01-23
KR920000232B1 (ko) 1992-01-10
JPS60155623A (ja) 1985-08-15
EP0132249A3 (en) 1987-10-14
ZA845522B (en) 1985-03-27
JPH0557331B2 (enrdf_load_stackoverflow) 1993-08-23

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