DD239805B1 - Method for producing a concrete steel - Google Patents

Method for producing a concrete steel Download PDF

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Publication number
DD239805B1
DD239805B1 DD27905485A DD27905485A DD239805B1 DD 239805 B1 DD239805 B1 DD 239805B1 DD 27905485 A DD27905485 A DD 27905485A DD 27905485 A DD27905485 A DD 27905485A DD 239805 B1 DD239805 B1 DD 239805B1
Authority
DD
German Democratic Republic
Prior art keywords
cooling
wire
water
reinforcing steel
guide
Prior art date
Application number
DD27905485A
Other languages
German (de)
Other versions
DD239805A1 (en
Inventor
Norbert Brennecke
Ernst Guenther
Walter Worgt
Wilfried Lampe
Original Assignee
Thaelmann Schwermaschbau Veb
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 Thaelmann Schwermaschbau Veb filed Critical Thaelmann Schwermaschbau Veb
Priority to DD27905485A priority Critical patent/DD239805B1/en
Publication of DD239805A1 publication Critical patent/DD239805A1/en
Publication of DD239805B1 publication Critical patent/DD239805B1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices 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
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02Winding-up or coiling
    • B21C47/10Winding-up or coiling by means of a moving guide
    • B21C47/14Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum
    • B21C47/143Winding-up or coiling by means of a moving guide by means of a rotating guide, e.g. laying the material around a stationary reel or drum the guide being a tube
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling
    • C21D9/5732Continuous furnaces for strip or wire with cooling of wires; of rods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/16Metal-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
    • B21B1/163Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices 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
    • B21B2045/0236Laying heads for overlapping rings on cooling conveyor

Description

For this 6 pages drawings

Field of application of the invention

The invention relates to a method and an apparatus for producing a reinforcing steel with high strength properties and a good weldability on modern wire rolling mills, wherein the rolled steel is subjected to a thermal treatment after leaving the last forming stage, a wire rod block.

Characteristic of the known technical solutions

Taking into account the requirements of the consumers of reinforcing steel, namely to have a good weldability at high strengths, the reinforcing steel is subjected to a thermal treatment during production on high-performance wire rod mills, so that a surface layer of tempered martensite forms and the core of the reinforcing steel has a ferrite Having perlite structure.

Thus, with DE-PS 2345738 a steel wire and a method for its production has become known, in which the core of the steel wire has fine-grained pearlite, which is surrounded by a wire surface forming, fully tempered martensite, which has a wire area of up to 33% having. The process from the rolling heat out is designed so that the steel wire after leaving the finishing of the wire rod is subjected to a multi-stage water cooling and cools after subsequent coiling in the covenant in free air to room temperature, the steel wire before the multi-stage water cooling to a temperature of 850 to 910 0 C and then cooled in several stages by water in about 0.2 seconds on its surface to below the martensite start temperature.

From a further publication, DE-PS 2900271, it is apparent that the reinforcing bars are ribbed and are manufactured on a wire rod. After leaving the finishing stack, the rolling stock is subjected to intensive cooling, in which the surface of the rolling stock is cooled below the martensite start temperature. The cooling should be done with such an intensity that the equilibrium temperature between the core and the surface is reached before the transformation into bainite, ferrite or pearlite can use, and that the compensation temperature is approximately in the temperature range in which a earliest possible conversion of austenite in Ferrite and pearlite can follow. After reaching the Ausgleichstemperturwenn the end of the Perlitumwanülung the temperature is kept approximately constant and then exposed to the rolling a slow cooling. This process also runs so that after passing through the cooling of the reinforcing steel on suitable devices, on reels, is wound up and cooled in the reel in the air. A corresponding device is known from DE-OS 302S229.

The disadvantages of the known solutions are that they can be used only for certain dimensions, the rolling stock is reeled, which makes additional facilities or devices required.

Object of the invention

The aim of the invention is to run under normal operating conditions in a wire train a process for rolling reinforcing steel, which ensures a quality-oriented and cost-effective process flow and in which the known equipment is used.

Explanation of the essence of the invention

The invention has for its object to provide a method for producing a high-quality reinforcing steel in the form of tempered Randmartensitschicht for a diameter range <10mm on modern high performance wire rolling plants, in which the reinforcing steel has a yield strength of> 500 MPa, a tensile strength of> 570MPa and a Minimum elongation of 10%. It is also the task of developing a suitable device that realizes the method by appropriate arrangement in the high-performance wire rolling mill.

The object is achieved by a method which takes place on a high-performance wire roller in the form that the reinforcing steel after exiting the wire rod block passes through a cooling section can be acted upon with water and the necessary cooling of the reinforcing steel is completed when it has reached and passed through a first Drahttreibeinrichtung , The cooling water passes through appropriate facilities in the cooling section and is varied depending on the rolling stock and the rolling speed. The connection or impingement of the cooling section with cooling water takes place only after passing the wire rod tip through the cooling section. After passing through the reinforcing steel by a first wire driving device it passes through a guide device in which the necessary temperature compensation between the core and surface layer takes place, forming a closed, tempered Randmartensitschicht on Walzgutoberfläche and present in the core cross-sectional area a ferrite-perlite structure. Thereafter, the reinforcing steel enters a second wire driving device, receives the necessary kinetic energy, to be then stored by a Windungslegers in quality windings on a crash roller table. Subsequently, the fanned reinforcing steel is transferred to a winding conveyor, undergoes further cooling by means of air and passes through a collecting roller table in a collecting shaft in which the reinforcing steel is deposited in commercial bundles. This further cooling by means of air is matched to the alloy content of the wire rod, so that the γ-α conversion takes place practically in the pearlite stage. In the method according to the invention is essential that the cooling of the reinforcing steel is completed before a first Drahttreibeinrichtung between the first and a second Drahttreibeinrichtung the temperature compensation takes place and the reinforcing steel thereafter has a temperature that ensures trouble-free Windungsbildung in the Windungsleger by means of the rotating laying pipe. At this time, the thermal treatment and the gefügemige training of reinforcing steel is already completed.

Another feature of the method is that the cooling of the reinforcing steel takes place without an intermediate temperature compensation and the necessary rapid cooling is achieved in that the static pressure in the cooling device, which consists of individual consecutively arranged cooling tubes is thereby increased by the between The cooling tubes provided stripping nozzles are acted upon by pressurized water, the pressure of which corresponds to the supply pressure of the cooling water for the cooling device. The individual wiping nozzles are arranged at a certain distance from the respective cooling tube, which is about twice as large as the inner diameter of the cooling tubes themselves from the end of the cooling tube to the beginning of the wiping nozzles. Trouble-free tempering compensation is achieved by inserting the rebar into the equalization zone of the rebar Cooling water is removed by means of water and air pressure from the reinforcing steel. For this purpose, there is a water and air nozzle after the last cooling tube and before the guide device. The device according to the invention is such that two wire driving devices are provided in the high-performance wire rolling mill. A first wire driving device is behind the cooling section and a second wire driving device is arranged in front of the Windungsleger. Between the two wire drive means a composite of cast parts guide means, a so-called guide channel, is provided. Part of the design according to the invention also includes that the cooling section consists of individual cooling tubes with corresponding internals, between the cooling tubes pressurized wiping stripping are provided and before the guide trough depending a water or air nozzle is arranged.

Another feature of the invention is that the Windungsleger is arranged inclined by about 10 °. According to the invention is still the special design of the outlet opening of the rotating laying pipe in the layers. In particular, the fact is taken into account that set at different temperatures, different stiffness in the cooled reinforcing steel, which lead to different storage in the fanning out and the Windungsabgen. It has therefore been found that the laying pipe is chamfered on the outlet side at a certain angle and provided with a flat baffle. The angle is about 3 to 5 °, while the dimension с = 3 to 5 mm. The dimension с is the distance from laying tube center to the baffle, based on the outlet opening, which of course also a double-sided bevel and then on both sides the attachment of baffles is possible.

The reinforcing steel produced by this method and on a high-performance wire rolling mill has been thermally treated and has material-like properties which are at yield strength values of 2500 MPa, tensile strength values of> 570 MPa and a minimum elongation of 10%. This reinforcing steel still has good welding properties. The advantage is that the arrangement of two Drahttreibeinrichtungen these are adjusted to each other so that only a small train is exercised on the reinforcing steel between the wire driving devices, which is sufficient to pull the reinforcing steel without the risk of buckling by the guide means and a quality Winding turns done.

embodiment

The invention will be explained in more detail with reference to an embodiment. The individual figures of the drawing show:

Fig. 1: a schematic representation of the plant part for the thermal treatment of the reinforcing steel

2 shows a longitudinal section through a part of the cooling section

3 shows the detail A of FIG. 2 in a sectional view

4: The detail B of FIG. 2 in a sectional view

5 shows a view of the laying tube fastening of the laying table

6 shows the section C-C of FIG. 5, turned dargestejlt

7 shows the section D-D of FIG. 5, shown rotated.

The overall view of the thermal treatment part of a high-performance wire roller system for the production of reinforcing steel is shown in FIG. 1. The illustrated wire rod block 1 is followed by the cooling section 2, which is adjoined by the first wire drive device, a wire driver 3, the guide device 4, which consists of composite cast parts as guide channel and a second wire drive device, a wire driver 5. Following the wire driver 5, the Windungsleger 6 is arranged at 10 ° inclined. In the further arrangement, an impact roller conveyor 7, a winding conveyor 8, a collecting roller table 9 and then a collecting shaft 11 with collecting dome 10 are provided. The air chiller 19 is located below the winding conveyor 8. The reinforcing steel, hereinafter referred to as wire rod, which was finish rolled in the wire rod block 1, enters the cooling section 2, in which it cools in the way that a boundary martensite layer of specified thickness is formed. The arranged behind the cooling section 2 first wire driver 3 has the task to overcome the force acting by the cooling water on the wire rod braking force and to ensure the trouble-free further transport of the wire rod. This is done in a guide device 4, the second wire driver 5 to the Windungsleger 6. The distance from the end of the cooling section 2 to the Windungsleger 6 is dimensioned so that the duration of the wire rod is sufficient to complete the temperature compensation between the core and edge zone and thus the necessary tempering to terminate the marginal martensite layer. This is necessary for trouble-free winding formation in the winding layer 6, so that the wire rod thereby has the lowest possible deformation resistance. The movement of the wire rod through the rotating laying tube 22 of the Windungslegers 6 secures essentially the second wire driver 5. By the Windungsleger 6 of the wire rod is continuously deposited in individual turns on a moving impact roller 7 and transferred to the winding conveyor 8, from where he over the composite roller table 9 passed to the collecting shaft 11 and the wire mandrel is formed on the collecting mandrel 10. Not quality appropriate, such as uncooled wire rod ends can be separated by the cropping shear 12 and then transported separately.

From Figure 2, the structure of the cooling section 2 shows. The cooling section 2 consists of several individual cooling tubes 13, which are mounted on prisms 21 and inserted in trays 20. Behind each individual cooling tube 13, the further cooling tubes 13 follow, a scraper 14 is arranged. Behind the cooling tube 13, which is arranged last, a combined scraper nozzle is provided which consists of a water nozzle 17 and an air nozzle 18, wherein the air nozzle 18 is arranged behind the water nozzle 17. The water nozzle 17 has the same function and the same structure as the scraper 14.

The cooling of the wire rod is carried out in the individual successively arranged cooling tubes 13 in a known manner by acting on the cooling tubes 13 with cooling water in the direction of the running wire rod. The improvement of the cooling effect by increasing the turbulence of the passing water is achieved by the incorporation of turbulence-enhancing elements. The cooling of the wire rod is done so with maximum cooling speed while minimizing the force acting on the wire rod braking force. For this purpose, a ratio cooling tube inner diameter D to wire rod diameter d of 2 to 3 is not exceeded or fallen below. In order to maintain the uniform cooling of the wire rod over the cross section of this constantly in the middle of the cooling tubes 13, it is in the head of the respective cooling tube 13 in guide bushings 15 (Figure 3) and in guides 16 within the Abstreifdüse 14, the water nozzle 17 and air nozzle 18 out (Fig.4). The inner diameter D'of the guide bushings 15 and the guides 16 have a ratio to the wire rod diameter d of 1.5 to 2.5, which is not exceeded or fallen below. The cascaded cooling tubes 13 ensure uninterrupted cooling of the wire rod without intermediate temperature compensation. In order to achieve the necessary rapid cooling, the static pressure in the cooling tube 13 is increased by the fact that the arranged between the cooling tubes 13 stripping nozzles 14 are acted upon by pressurized water whose pressure matches the supply pressure of the cooling water for the cooling tube 13 and the distance a from the end of the cooling tube 13 to the beginning of the wiping nozzle 14 and water nozzle 17 is twice as large as the inner diameter of the cooling tubes 13. To ensure safe stripping of the cooling water after the last cooling tube 13, ie At the end of the cooling section 2, to achieve and thus ensure the necessary temperature compensation trouble-free, the stripping of the cooling water by means of water through the water nozzle 17 and with air through the air nozzle 18. The water pressure in the water nozzle 17 has the value of the 1, 5 times the supply pressure of the cooling water to the last cooling tube 13 corresponds.

FIG. 5 shows the laying head 6 with the laying tube 22 and the guide plate 23 arranged on the laying tube. When rolling the thermally strengthened reinforcing steel with tempered boundary martensite layer, it is necessary that the water cooling is switched on only after the wire rod injection has been detected by the wire driver 3. Since the connection of the cooling water takes place in a very short time, there is a very rugged transition between the uncooled wire tip and the subsequent cooled wire. To minimize the scrap content of this transition is advantageous, but by the resulting different wire stiffness is also a sudden change in the exit velocity vA of wire turns from the Windungsleger 6. Explainable this fact found in practical rolling operation is characterized by the higher stiffness of the cooled wire whose leadership changes in laying pipe 22. If the wire rod is not cooled below 800 ... 750 c C, its guide is stable in the area b of the unfiltered outlet opening (Fig. 6).

When cooling to a temperature of 600 0 C and below is changed as a result of the higher wire stiffness of the course through laying tube 22 and in extreme cases, even shifted to the other pipe inside and explain the change in the exit velocity of the wire from the Windungsleger 6. There is an increase in the exit angle, ie the slope of the wire turns. Assuming a standard inner diameter of laying tube 22 of d = 35 ... 40 mm, this increase is remarkable. In the above-described connection of the cooling water in a very short time, this leads to non-quality overlaps of the wire windings on the impact roller 7 and the winding conveyor 8 after the Windungsleger 6 and then to disturbances in the collecting shaft 18. The cooled to = 600 0 C wire turns overtake the extent not refrigerated. The overlaps of the wire windings is inventively counteracted by the fact that the guide tube outlet 23 is mounted. The laying tube 22 is preferably beveled at an angle of α = 3 ... 5 0 . The resulting lateral laying pipe opening is closed by a flat guide plate 23, which approaches the center of the pipe at the outlet opening to the extent = 3 ... 5 mm (FIG. 7). An upsetting or jamming of the wire in laying tube 22 is thus prevented. When the water cooling is used, the wire is then guided through the baffle 23, ie the change in pitch is approximately halved, and the overlaps that disturb the collection are thus avoided.

Claims (7)

1. A process for producing a reinforcing steel on high-performance wire rolling mills, which has good welding properties, undergoes a thermal treatment, which forms a mixed structure of ferrite and pearlite in the core cross-section and the surface has a closed annealed martensite, characterized in that the cooling of the wire rod Before a first wire driving device is completed, between the first and a second wire driving the temperature compensation takes place and the resulting reinforcing steel thereafter has a temperature that ensures trouble-free Windungsbildung, the thermal treatment and the gefügemige training of the reinforcing steel are already completed at this time.
2. The method according to claim 1, characterized in that after the laying of the reinforcing steel to turns this undergoes further intensive cooling by means of forced air, wherein said cooling is tailored to the alloy content of the wire rod, so that the γ-α conversion virtually completely in the Perlite is carried out.
3. The method according to claim 1, characterized in that the cooling of the wire rod is carried out continuously and without intermediate temperature compensation, by increasing the static pressure of the cooling water, a rapid cooling is achieved, which happens by pressurized water stripping devices.
4. Apparatus for carrying out the method according to claim 1, characterized in that in the system part for the thermal treatment behind the cooling section (2), which is formed from cooling tubes (13), a first wire driver (3) and a guide device (4) and a second wire driver (5) is arranged adjacent to the guide means (4) but before the inclined layer (6).
5. Apparatus according to claim 4, characterized in that the cooling tubes (3) mounted on prisms (21) and arranged in so-called trays (20), wherein between the individual cooling tubes (13) wiping nozzles (14), with the same pressure of Cooling water is applied and between the last cooling tube (13) and the guide device (4) a combined scraper, consisting of a 1.5 times the cooling water pressure acted upon water nozzle (17) and an air nozzle (18) is arranged.
6. Apparatus according to claim 5, characterized in that the wiping nozzles (14) and water nozzles (17) have the same function and the same structure and are arranged at a certain distance to the end of the respective cooling tube (13), wherein the distance a double is as large as the inner diameter of the cooling tubes (13).
7. The device according to claim 4, characterized in that the Windungsleger (6) is equipped with a laying tube (22) whose outlet opening is tapered and provided with a guide plate (23) extending at the outlet to the extent с = 3 to 5 mm of the center of the pipe approaches and which is arranged at an angle of α = 3 to 5 °.
DD27905485A 1985-07-29 1985-07-29 Method for producing a concrete steel DD239805B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD27905485A DD239805B1 (en) 1985-07-29 1985-07-29 Method for producing a concrete steel

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DD27905485A DD239805B1 (en) 1985-07-29 1985-07-29 Method for producing a concrete steel
DE19863601753 DE3601753A1 (en) 1985-07-29 1986-01-22 Method and device for producing a concrete steel
IT1961786A IT1204824B (en) 1985-07-29 1986-03-04 Method and device for the manufacture of a concrete reinforcing bars
SE8601405A SE467928B (en) 1985-07-29 1986-03-26 Foerfarande and apparatus foer vaermebehandling of armeringsstaal at framstaellning in traadvalsverk
GB8608505A GB2178981B (en) 1985-07-29 1986-04-08 Process and apparatus for producing a concrete-reinforcement steel wire
FR8605851A FR2585368B1 (en) 1985-07-29 1986-04-23 Process and device for manufacturing a concrete round
BE0/216807A BE904958A (en) 1985-07-29 1986-06-19 Method and device for manufacturing concrete iron.

Publications (2)

Publication Number Publication Date
DD239805A1 DD239805A1 (en) 1986-10-08
DD239805B1 true DD239805B1 (en) 1988-06-22

Family

ID=5570002

Family Applications (1)

Application Number Title Priority Date Filing Date
DD27905485A DD239805B1 (en) 1985-07-29 1985-07-29 Method for producing a concrete steel

Country Status (7)

Country Link
BE (1) BE904958A (en)
DD (1) DD239805B1 (en)
DE (1) DE3601753A1 (en)
FR (1) FR2585368B1 (en)
GB (1) GB2178981B (en)
IT (1) IT1204824B (en)
SE (1) SE467928B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007032987A1 (en) * 2007-07-16 2009-01-22 Sms Meer Gmbh Method for producing wire and wire rolling mill
CN102626712B (en) * 2012-05-08 2014-06-25 山西太钢不锈钢股份有限公司 Rolling equipment and method for stainless threaded steel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES470858A1 (en) * 1977-06-20 1979-10-01 British Steel Corp Welded steel rod grid prodn. for use as concrete reinforcement - by hot rolling steel into rod, water cooling, air cooling to temper the surface and welding to form grid
FR2445499B1 (en) * 1978-12-26 1983-11-10 Siderurgie Fse Inst Rech
DE2900271C2 (en) * 1979-01-05 1984-01-26 Stahlwerke Peine-Salzgitter Ag, 3150 Peine, De
FR2457724B1 (en) * 1979-06-01 1983-05-13 Siderurgie Fse Inst Rech
DE3029229A1 (en) * 1980-08-01 1982-04-01 Moeller & Neumann Gmbh Rolled steel wire water cooled and coiled without reel - is coil cooled in air to form pearlite core with tempered martensite skin
DD210621A1 (en) * 1982-10-14 1984-06-20 Thaelmann Schwermaschbau Veb Ringduese for stripping the cool water from the roll
US4527408A (en) * 1983-10-31 1985-07-09 Morgan Construction Company Method and Apparatus for cooling and handling hot rolled steel rod in direct sequence with a high speed rolling operation
FR2569424B3 (en) * 1984-08-23 1986-09-05 Siderurgie Fse Inst Rech Method of manufacturing long crenelated metal products, particularly steel, and device for implementing same

Also Published As

Publication number Publication date
SE467928B (en) 1992-10-05
FR2585368A1 (en) 1987-01-30
GB2178981B (en) 1989-05-10
SE8601405L (en) 1987-01-30
IT1204824B (en) 1989-03-10
IT8619617D0 (en) 1986-03-04
BE904958A (en) 1986-10-16
BE904958A1 (en)
DD239805A1 (en) 1986-10-08
GB2178981A (en) 1987-02-25
DE3601753A1 (en) 1987-01-29
FR2585368B1 (en) 1993-05-07
GB8608505D0 (en) 1986-05-14
SE8601405D0 (en) 1986-03-26

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ENJ Ceased due to non-payment of renewal fee