EP0551775A1 - Dispositif de laminage pour tôles - Google Patents

Dispositif de laminage pour tôles Download PDF

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Publication number
EP0551775A1
EP0551775A1 EP92402426A EP92402426A EP0551775A1 EP 0551775 A1 EP0551775 A1 EP 0551775A1 EP 92402426 A EP92402426 A EP 92402426A EP 92402426 A EP92402426 A EP 92402426A EP 0551775 A1 EP0551775 A1 EP 0551775A1
Authority
EP
European Patent Office
Prior art keywords
rolling
metal plate
rolling apparatus
rolls
pinch rolls
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.)
Granted
Application number
EP92402426A
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German (de)
English (en)
Other versions
EP0551775B1 (fr
Inventor
Kazumi Isaka
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of EP0551775A1 publication Critical patent/EP0551775A1/fr
Application granted granted Critical
Publication of EP0551775B1 publication Critical patent/EP0551775B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/62—Continuous furnaces for strip or wire with direct resistance heating
    • 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
    • B21B45/004—Heating the product
    • 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
    • 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
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills

Definitions

  • the present invention relates to a metal plate rolling apparatus in which a metal plate, sheet, or strip to be rolled is heated to a predetermined temperature by directly applying an electric current to the metal plate, sheet, or strip during rolling.
  • Metal plate, metal sheet, and metal strip are collectively referred to as metal plate hereunder.
  • Metal plates such as steel plates are usually heated in a heating furnace and then are passed into a rolling mill when hot or warm rolling is carried out.
  • a metal plate may be heated before rolling by an induction heating device employed in the rolling line with or without using a conventional heating furnace.
  • a metal plate is cooled due to heat radiation while the metal plate is being transferred to a rolling mill after being discharged from a heating furnace.
  • the metal plate is further cooled when it is contacted with a work roll just before rolling. Therefore, the metal plate is heated to a temperature which is determined by taking into account such a decrease in temperature.
  • an excessively high temperature is set as the heating temperature, not only an increase in scale loss but an increase in energy costs are inevitable.
  • induction heating For such purposes it is conceivable to employ induction heating.
  • a heating method requires a complicated control system for electric current, for example, making the heating apparatus expensive.
  • the heating efficiency i.e., the ratio of generated thermal energy to the electric energy supplied, is as low as about 30%.
  • direct resistance heating is practiced.
  • An electric current is directly supplied to a rolling material so as to heat the rolling material to a rolling temperature by Joule heat.
  • application of direct resistance heating to a metal plate, such as steel sheet and steel strip, is quite difficult.
  • Figure 1a and Figure 1b illustrate a conventional direct resistance heating system employed for hot rolling of wire 15 using a grooved roll which serves as an electric current supply roll 14.
  • a wire 15 contacts the roll 14 in the groove 16. Since the wire contacts the roll 14 along the periphery at an angle of ⁇ , the contact area between the wire and the roll is enlarged, and an electric current supplied through the roll to the wire effectively heats the wire. It is desirable to supply as much electric current as possible in order to effect as rapid heating as possible.
  • the current density of an electric current to be supplied to the roll is limited to 2 A/mm2 so as to achieve a stable supply of electric current while suppressing occurrence of flashing or sparking between the wire and roll.
  • the plate width is 100 mm and the thickness is 0.5 mm, then the contact area S is 10 mm2, and the volume per unit length is 50 mm3. According to these dimensions, when the current density is 2 A/mm2 at maximum, the upper limit of electric current is 20 A per roll, so that it is impossible to effect rapid heating of a steel plate having a large heat content.
  • Japanese Unexamined Published Patent Application Specification No.183706/1988 discloses a rolling mill equipped with a direct resistance heating system.
  • a sketch of this apparatus is shown in Figure 2, in which a rolling material 1 is contacted with a pair of work rolls 2, 2 which serve as positive and negative electrodes, respectively, and through which an electric current is supplied from the positive electrode to the negative electrode via the rolling material 1.
  • work rolls 2, 2 are heated.
  • at least one of the electrodes, i.e., work rolls 2, 2 should be electrically isolated from the environment, such as the housing and drive systems.
  • Such isolation of work rolls is costly, since large loads are applied to the work rolls, and high techniques are required with respect to the materials and mechanism to be employed for isolation.
  • An object of the present invention is to provide a metal plate rolling apparatus with which it is possible to control a rolling temperature precisely by effecting rapid heating within a rolling line, resulting in a decrease in energy costs as well as material costs.
  • a more specific object of the present invention is to provide a metal plate rolling apparatus in which an electric current is directly supplied to a rolling material so as to directly heat the material.
  • Another object of the present invention is to provide a rolling apparatus in which rolling and heat treatment can be conducted simultaneously in the same production line.
  • Still another object of the present invention is to provide a metal plate rolling apparatus in which an inert atmosphere is employed and rapid cooling can be achieved after rolling so that a rolling material at a high temperature does not contact ambient air.
  • the present invention is a metal plate rolling apparatus which comprises at least a pair of pinch rolls which are provided on the inlet side of the rolling apparatus and are connected to an electric source, and a pair of work rolls which are installed in the apparatus and are grounded.
  • the apparatus further comprises a pair of pinch rolls which are provided on the outlet side of the rolling apparatus and are connected to an electric source.
  • the apparatus may comprise one or more additional pairs of pinch rolls which are provided upstream of the first ones on the inlet side of the rolling apparatus and which are grounded.
  • the present invention is a metal plate rolling apparatus which comprises at least a pair of pinch rolls which are provided on the inlet side of the rolling apparatus and are connected to an electric source, a pair of work rolls which are installed in the apparatus and are grounded, and a fluid injection means, i.e., a gas or liquid injection means either on the inlet or outlet side of the rolling apparatus.
  • a fluid injection means i.e., a gas or liquid injection means either on the inlet or outlet side of the rolling apparatus.
  • the work rolls and the surroundings may be isolated from the ambient air, or metal plate may be cooled immediately after the rolling.
  • the metal plate includes, for example, plates, sheets, and strips of steel such as carbon steel, alloyed steel, and stainless steel, titanium, and cladded material thereof, or complex plate of the metal plate with an organic or inorganic layer. Namely, so long as the plates produce Joule heat when they are supplied with an electric current, they are not limited to specific ones.
  • the temperature attained by the present invention can be controlled precisely depending on the purposes of the heating.
  • the heating of the present invention may be carried out for hot rolling, heat treatment, or warm rolling.
  • the temperature can be controlled to high temperatures for hot rolling and various heat treatment and to lower temperatures for warm rolling.
  • heating by a conventional heating furnace may be employed for pre-heating.
  • Figure 3 illustrates a manner in which a rolling material 1 is rolled with a metal plate rolling apparatus of the present invention, in which the rolling material 1 is passed in the direction shown by an arrow and is rolled by means of a pair of rolls 2-1 and 2-2 which are supported by back-up rolls 3-1 and 3-2, respectively.
  • a pair of pinch rolls 4-1 and 4-2 are provided on the inlet side, i.e., upstream of the rolling apparatus in order to supply an electric current to the rolling material.
  • At least one of the pinch rolls is connected to an electric power source 5.
  • At least one additional pair of pinch rolls may be provided.
  • the contact pressure of the pinch rolls may be on the order of 1 kgf/mm2, i.e., a rolling force of about several tons for the pinch rolls having a diameter of 200 mm onto a rolling plate 1000 mm wide.
  • two or more pairs of pinch rolls may be provided on the inlet side of the rolling apparatus in such a manner that one of them may be shifted downwards or upwards to provide an intermesh between the neighboring pinch rolls.
  • the pinch rolls do not contact the plate in the edges.
  • any types of deflection rolls can be used.
  • a variable-crown roll in which a gas or liquid under pressure is fed into a gap provided between a sleeve and roll arbor may be employed so as to ensure contact of the pinch rolls with the rolling plate even in its edges areas.
  • the work rolls 2-1 and 2-2 are grounded so as to be at zero potential.
  • the electric power source 5 may be either of the direct current or alternating current type.
  • the rolling material When the rolling material is rolled with a rolling apparatus of the present invention, the rolling material is passed into the rolling apparatus in which the rolling material is contacted with the pair of pinch rolls and then with the pair of work rolls. Between the pinch rolls and the work rolls an electric current which is determined by the electric potential and current density passes through the rolling material to generate Joule heat due to the electric resistance of the rolling material. Since the distance between the pinch rolls and the work rolls is substantial, the effective electric resistance between them is enough to generate a sufficient amount of heat for rolling and heat treatment. Thus, the distance between the pinch rolls and the work rolls may be determined depending on the material to be rolled, a target heating temperature, rolling conditions, and the like.
  • an additional pair of pinch rolls 5-1 and 5-2 is provided downstream of the rolling apparatus.
  • the additional pinch rolls 5-1 and 5-2 are not essential, the provision of such pinch rolls is desirable for the purpose of maintaining hot conditions of a rolled material and heating to a predetermined temperature for heat treatment.
  • Such additional pinch rolls 5-1 and 5-2 may be connected to the electric source 6, like the pinch rolls 4-1 and 4-2.
  • the pinch rolls 5-1 and 5-2 are positioned upstream of the rolling apparatus and the pinch rolls 5-1 and 5-2 serve as heating means prior to rolling.
  • pinch rolls 7-1 and 7-2 may be provided on the upstream side. These additional pinch rolls 7-1 and 7-2 are grounded in the same manner as the work rolls 2-1 and 2-2. Thus, the pinch rolls 7-1 and 7-2 are effective not only to heat the rolling material prior to rolling, but also to keep the potential of the rolling material at zero upstream of the pinch rolls 4-1 and 4-2.
  • the pinch rolls 4-1 and 4-2 are also effective to hold the rolling material, apply a tension to the rolling material in the area between the rolling apparatus and the pinch rolls, and maintain a stable manner of passing and a desirable degree of the contact force.
  • Figure 5 shows a side view of the rolling apparatus including work rolls 2-1 and 2-2 and pinch rolls 4-1 and 4-2 which can be used in the present invention.
  • the rolling mill itself contains back up rolls 3-1 and 3-2 and work rolls 2-1 and 2-2.
  • the basic structure of the rolling mill and the mechanism of rolling a rolling material using this mill are the same as for a conventional rolling mill.
  • an electrically conductive brush 9 is placed against the axes of the work rolls 2-1 and 2-2 by means of a spring 10.
  • the brush 9 is electrically connected to a housing 11 so that the potential of the work rolls is the same as that of the ground.
  • the pinch rolls 4-1 and 4-2 are connected to an electric source 5 (see Figure 3) by way of a brush (not shown).
  • Optional pinch rolls 5-1 and 5-2 and pinch rolls 7-1 and 7-2 are also electrically connected in the same manner as described above.
  • a brush is made to contact pinch rolls 4-1 and 4-2, and an electric current (direct current or alternative current) is supplied.
  • a brush is made to contact the work rolls 2-1 and 2-2 and is grounded.
  • the electric current passes from the pinch rolls to a circuit comprising the rolling metal plate, the work rolls, the housing, and ground, so a sufficient amount of heat, i.e., Joule heat may be generated in the rolling plate.
  • the amount of heat, i.e., the temperature of the rolling material can be easily controlled by adjusting the electric power supplied to the apparatus. It is desirable to provide a temperature sensor near the inlet of the work rolls so as to detect the temperature of the rolling material.
  • a sufficient length of heating zone for the rolling material is ensured by suitably selecting the distance between the position of the pinch rolls and the rolling mill itself. This is because the amount of heat electrically generated, i.e., Joule heat, depends on the effective resistance, and the effective resistance is proportional to the distance between the pinch rolls and the rolling mill. So, according to the present invention, it is possible to effect efficient heating by applying an electric current in an amount much smaller than that required in the case of Figure 2. This means that an electric power source and distribution line of smaller capacity may be employed to reduce equipment costs. Furthermore, since the work rolls are grounded, there is no need to worry about insulation.
  • Figures 3 and 5 show a conventional 4Hi-roll mill, but the present invention is not limited to such a roll mill.
  • the rolling apparatus of the present invention may be applied to a variety of rolling lines which comprise rolling mills, such as a 2Hi-roll mill without a back-up roll, a 6Hi-roll mill, and a roll mill of the so-called roll-shift type in which an intermediate roll is traversed in an axial direction.
  • Figure 7 shows another embodiment of the present invention, in which work rolls 2-1 and 2-2 of a small diameter, intermediate rolls 12-1 and 12-2, and support rolls 13-1 and 13-2 are incorporated in an assembly to form a 6Hi-rolling mill.
  • a rolling mill of this type can be used to roll a thin plate and a hard plate, since under the same rolling loads a larger contact pressure can be applied to the plate to be rolled compared to the 2Hi-roll mill. This is because the diameter of the work rolls is smaller than in the 2Hi-roll mill.
  • a direct resistance heating system such as shown in Figure 2 is employed, either the intermediate rolls 12-1 and 12-2 or back-up rolls 3-1 and 3-2 must be electrically insulated from the work rolls.
  • the back-up rolls are mechanically connected with a drive system, so it is rather difficult to apply insulation between the work rolls and the drive system.
  • this type of a roll mill is characterized by a small diameter work roll to achieve a high pressure rolling, and since the contact pressure between the work rolls and intermediate rolls is extremely high, it is quite difficult to apply insulation between the work rolls and the intermediate rolls, too.
  • Figures 8 and 9 show another embodiment of a metal plate rolling apparatus of the present invention. This embodiment is substantially the same as that illustrated in Figures 3 and 5 except that the apparatus shown in Figures 8 and 9 is equipped with gas or liquid injection nozzles 8-1, 8-2, 8-3, and 8-4. The same member as in Figures 3 and 5 are indicated by the same reference numerals in Figures 7 and 8.
  • nozzles 8-1, 8-2, 8-3, and 8-4 are provided on the inlet and outlet sides of the rolling mill. These nozzles are placed in a row, or in rows on the upper and lower sides of the plate so as to thoroughly isolate the plate from its surroundings in the widthwise direction.
  • Figures 8 and 9 illustrate the case in which the nozzles are provided on both the inlet and outlet sides of the rolling mill, the nozzles may be provided on one side only on either the upstream or downstream side.
  • Another set of nozzles 8-1', 8-2', 8-3', and 8-4' may also be provided so as to further strengthen the isolation of the plate from its surroundings during rolling.
  • the temperature of the metal plate to be rolled increases rapidly while approaching the work rolls where the temperature reaches a maximum.
  • the length of time when the heated plate is exposed to the atmosphere, i.e., to air is minimized compared to the case wherein a conventional heating furnace or induction heating apparatus is used to heat the metal plate prior to rolling.
  • a row or rows of nozzles are provided on the inlet and/or outlet sides of the rolling mill.
  • argon gas is injected through the nozzles 8-1 and 8-2 provided on the inlet side of the mill, an area where the temperature is maximized may be thoroughly isolated from the ambient atmosphere during rolling, resulting in less occurrence of undesirable oxidation.
  • the metal plate is sealed by the upper and lower work rolls from the ambient atmosphere, so rolling is carried out completely in non-oxidizing environments. Therefore, hot rolling at a temperature of 1000°C or higher may be carried out without a fear of oxidation.
  • the nozzles 8-3 and 8-4 in the outlet side may be used to inject an inert gas, such as argon gas.
  • a rapid cooling with cooling water after rolling a metal plate is also effective for carrying out heat treatment to provide the metal plate with specific characteristics.
  • a rolling apparatus like that shown in Figure 5 was used to roll a stainless steel (JIS SUS 304) plate.
  • the dimensions of the rolling mill and hot rolling conditions employed are summarized as follows.
  • Work roll diameter 100 mm Back-up roll diameter: 330 mm Front tension: 5 kgf/mm2 Back tension: 5 kgf/mm2
  • Maximum rolling load 100 tons Pinch roll diameter: 80 mm
  • Axial distance between work roll and pinch roll 700 mm
  • Rolling material (plate): SUS 304 Initial thickness (before rolling): 0.25 mm Final thickness (after rolling): 0.20 mm Plate width: 300 mm
  • Rolling load 85 tons Electric source: Alternating current (commercial frequency), 10 V, 1500
  • the temperature of the rolling plate just before reaching the work rolls was determined to be 740°C ⁇ 5°C.
  • the hot rolling was carried out smoothly without any troubles, such as occurrence of sparks. It was also experimentally determined that there were no sparks even for a light duty reduction, i.e., a rolling force of about 1 ton. It was also confirmed that a rolling force for the pinch rolls of about 100 kg or more is enough for the total of the rolls in the driving and working sides. However, it is also advisable to maintain the flatness of the rolling material by controlling the rolling force balance as well as the tension of the rolling material between the pinch rolls and the work rolls.
  • Example 1 was repeated except that a rolling apparatus like that shown in Figure 8 was used, the rolling rate was 10 m/min, and the heating temperature was 1150°C on the inlet side of the rolling mill. At a point 50 mm away from the work rolls four pairs of nozzles placed in a row in the widthwise direction of the plate were installed on both the inlet and outlet side of the rolling apparatus.
  • the thickness of scale was determined for the cases in which argon gas or water was injected through the nozzles, and for the cases in which the nozzles were not used.
  • the test results are also shown in Table 1.
  • the water or gas injection conditions were as follows. Nozzles on the inlet side: Ar gas: Pressure: 5kgf/cm2 Feed : 10 l/min Nozzles on the outlet side: Water: Pressure: 2.5kgf/cm2 Feed : 5 l/min Table 1 Test No.
  • Test No.1 was a comparative example in which no injection was carried out on both the inlet and outlet sides.
  • the temperature of the plate after rolling was 1050°C and the scale thickness was 5.2 ⁇ m.
  • Test No. 2 was a working example of the present invention in which Ar gas injection was carried out only on the inlet side. In this case the cooling on the outlet side was the same as in Test No.1, and the temperature of the plate after rolling was the same as in Test No. 1. However, since prior to rolling the plate was sealed from its surroundings, the scale thickness was reduced to 3.1 ⁇ m.
  • Test No. 3 was also a working example of the present invention, in which only water injection was carried out on the outlet side.
  • Test No. 4 was also an example of the present invention, in which both argon gas injection on the inlet side and water injection on the outlet side were carried out. There was substantially no scale, and the thickness of scale could not be measured.
  • the present invention heating of a rolled plate can be carried out efficiently, and it is easy to control the temperature.
  • the present invention is advantageous from the standpoint of energy savings, operating efficiency, and product quality. Namely, the rolling apparatus of the present invention does not require the provision of an insulation layer or member, and an electric source of a small capacity may be used with a marked reduction in equipment costs.
  • a metal plate can easily be isolated from the ambient atmosphere before, during, or after rolling merely by injecting an inert gas or water against the metal plate.
  • the formation of oxide scale is prevented markedly, and it is easy to effect descaling, or sometimes it is not necessary to effect descaling, making the process and apparatus for rolling a plate simple.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Control Of Resistance Heating (AREA)
  • Metal Rolling (AREA)
EP19920402426 1992-01-17 1992-09-04 Dispositif de laminage pour tÔles Expired - Lifetime EP0551775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6377/92 1992-01-17
JP637792A JPH05185129A (ja) 1992-01-17 1992-01-17 金属板の圧延装置

Publications (2)

Publication Number Publication Date
EP0551775A1 true EP0551775A1 (fr) 1993-07-21
EP0551775B1 EP0551775B1 (fr) 1997-05-21

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ID=11636692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920402426 Expired - Lifetime EP0551775B1 (fr) 1992-01-17 1992-09-04 Dispositif de laminage pour tÔles

Country Status (3)

Country Link
EP (1) EP0551775B1 (fr)
JP (1) JPH05185129A (fr)
DE (1) DE69219876T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1607147A1 (fr) * 2004-06-17 2005-12-21 PLANSEE Aktiengesellschaft Procédé et machine pour la production d'une tôle mince ou d'une feuille de matière métallique par laminage
DE102014114402A1 (de) * 2014-10-02 2016-04-07 Thyssenkrupp Ag Kohlenstoffelektrode sowie Verfahren und Vorrichtung zu ihrer Herstellung
CN112474802A (zh) * 2020-11-19 2021-03-12 中北大学 一种制备不锈钢/铝/不锈钢层状复合板的设备及方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE51188C (de) * C. M. PlELSTICKER in London, E. C. Room 186 Souffolk House, Cannon Street Verfahren und Apparate zum Glühen des auszuwalzenden Metalldrahtes oder Bandeisens mittelst des elektrischen Lichtbogens
DE84088C (fr) *
US1347917A (en) * 1918-07-10 1920-07-27 Morgan Construction Co Method of and apparatus for rolling metal
GB294157A (en) * 1927-04-19 1928-07-19 Bruno Witting Improvements in or relating to electric heating of metal prior to rolling
US2035312A (en) * 1933-07-27 1936-03-24 Herbert C Greer Continuous strip annealing furnace
DE702241C (de) * 1936-02-20 1941-02-03 Emil Vits Walzwerk mit unmittelbarer Erwaermung des WalzguteKontaktwalzen
FR862922A (fr) * 1939-01-17 1941-03-19 Perfectionnements apportés aux procédés du genre de ceux pour le laminage et l'étirage
US3307015A (en) * 1963-06-17 1967-02-28 San Etsu Kinzoku Kogyo Kabushi Continuous heat treating apparatus for metal strips
US4822969A (en) * 1988-04-21 1989-04-18 Neturen Company Limited Apparatus for continuous-direct-resistance heating of long-length articles
FR2673198A1 (fr) * 1991-02-22 1992-08-28 Cezus Co Europ Zirconium Procede de fabrication d'une bande ou tole en zircaloy 2 ou 4 et produit obtenu.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE51188C (de) * C. M. PlELSTICKER in London, E. C. Room 186 Souffolk House, Cannon Street Verfahren und Apparate zum Glühen des auszuwalzenden Metalldrahtes oder Bandeisens mittelst des elektrischen Lichtbogens
DE84088C (fr) *
US1347917A (en) * 1918-07-10 1920-07-27 Morgan Construction Co Method of and apparatus for rolling metal
GB294157A (en) * 1927-04-19 1928-07-19 Bruno Witting Improvements in or relating to electric heating of metal prior to rolling
US2035312A (en) * 1933-07-27 1936-03-24 Herbert C Greer Continuous strip annealing furnace
DE702241C (de) * 1936-02-20 1941-02-03 Emil Vits Walzwerk mit unmittelbarer Erwaermung des WalzguteKontaktwalzen
FR862922A (fr) * 1939-01-17 1941-03-19 Perfectionnements apportés aux procédés du genre de ceux pour le laminage et l'étirage
US3307015A (en) * 1963-06-17 1967-02-28 San Etsu Kinzoku Kogyo Kabushi Continuous heat treating apparatus for metal strips
US4822969A (en) * 1988-04-21 1989-04-18 Neturen Company Limited Apparatus for continuous-direct-resistance heating of long-length articles
FR2673198A1 (fr) * 1991-02-22 1992-08-28 Cezus Co Europ Zirconium Procede de fabrication d'une bande ou tole en zircaloy 2 ou 4 et produit obtenu.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 94 (M-574)(2541) 25 March 1987 & JP-A-61 245 911 ( KAWASAKI STEEL ) 1 November 1986 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1607147A1 (fr) * 2004-06-17 2005-12-21 PLANSEE Aktiengesellschaft Procédé et machine pour la production d'une tôle mince ou d'une feuille de matière métallique par laminage
DE102014114402A1 (de) * 2014-10-02 2016-04-07 Thyssenkrupp Ag Kohlenstoffelektrode sowie Verfahren und Vorrichtung zu ihrer Herstellung
CN112474802A (zh) * 2020-11-19 2021-03-12 中北大学 一种制备不锈钢/铝/不锈钢层状复合板的设备及方法

Also Published As

Publication number Publication date
EP0551775B1 (fr) 1997-05-21
DE69219876T2 (de) 1998-01-02
JPH05185129A (ja) 1993-07-27
DE69219876D1 (de) 1997-06-26

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