US2994328A - Rod patenting - Google Patents

Rod patenting Download PDF

Info

Publication number
US2994328A
US2994328A US599187A US59918756A US2994328A US 2994328 A US2994328 A US 2994328A US 599187 A US599187 A US 599187A US 59918756 A US59918756 A US 59918756A US 2994328 A US2994328 A US 2994328A
Authority
US
United States
Prior art keywords
rod
temperature
voltage
contacts
cooling
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
US599187A
Other languages
English (en)
Inventor
Lewis Dartrey
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.)
Siemens Industry Inc
Original Assignee
Morgan Construction Co
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
Priority to BE559389D priority Critical patent/BE559389A/xx
Application filed by Morgan Construction Co filed Critical Morgan Construction Co
Priority to US599187A priority patent/US2994328A/en
Priority to GB22321/57A priority patent/GB843619A/en
Priority to FR1179609D priority patent/FR1179609A/fr
Application granted granted Critical
Publication of US2994328A publication Critical patent/US2994328A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • B21B1/18—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 in a continuous process

Definitions

  • the present invention relates to the hot rolling and heat treating of carbon steel rods to facilitate their being drawn into wire.
  • Rods of such composition as hot rolled contain a Very coarse sructure of pearlite, which is of irregular formation and makes the rods unsuitable for cold wire drawing except to a very limited extent.
  • the patenting operation irnproves this structure by first getting the carbon back into solid solution in the iron and then allowing the carbon to come back out of solution in the form of very line plates of iron carbide (cementite) closely spaced.
  • cementite iron carbide
  • the pearlitic structure thus obtained is frequently so fine that it cannot readily be resolved under the microscope even at 1000 magniiications.
  • Such a structure has much higher strength and is suitable for cold drawing through six or more successive dies until the total reduction of area is 90% or more of the original cross-sectional area.
  • Finishing temperatures in a hot rolling mill are frequently of the order of l800 F., and in order to develop a metallurgical structure in this rod similar to that produced lby customary patent ing operations it is necessary to cool the rod rapidly and uniformly from the finishing temperature to a temperature within the range of about 900 to 1300 F. and then hold the rod within that range -for a period of 10 seconds or more while the carbon comes out of solution. If the rod is not cooled suiiiciently, the pearlitic structure will be too coarse, especially in the center of the rod. If the rod is cooled too much, the center of the rod may be of the proper ne pearlitic structure but the surface will be acicular or Bainitic in structure. In fact, if the cooling is too great, definite hardening may be produced with the formation of sorbite, martensite, or similar structures, which greatly impair the ability of the rods to be drawn.
  • lt is thus a principal object of the invention to provide, in a patenting operation, means for maintaining substantially constant the rod tempertaure at a particular early point in the patentin-g operation, despite the variations in temperature from point to point in the rod passing such early point of the patenting operation.
  • Another object of the invention has been to provide means for controlling the cooling water or other liquid pressure in the cooling system in accordance with variations in temperature frorn rod to rod and in accordance with variations in temperature along the length of any particlular rod.
  • Another object of the invention has been to provide means for delaying control action on the water pressure control until the temperature indicating means exposed to a new rod has arrived at an indication corresponding to the temperature of the rod.
  • Still another object of the invention has been the provision of means for presetting the cooling water pressure prior to passage of a rod through the cooling system.
  • a further object of the invention has been to provide means for varying the cooling water pressure in a patenting operation in response to changes in rod speed.
  • a feature of the invention has been the provision of rod guide means larranged to guide the moving rod within the field of vision of an optical pyrometer and adapted to permit fins and other variations in rod diameter to pass without causing the rod to cobb-le.
  • a uniform desired temperature is maintained throughout the length of a hot rolled rod by providing means for varying the cooling liquid pressure at a iirst cooling station in response to fluctuations of temperature along the rod as measured before the rod reaches the irst cooling station, and in ressponse to deviations from the desired temperature as measured after the rod passes the iirst cooling station.
  • FIG. l is a schematic diagram of apparatus in accordance with the invention for heat treating steel rods ⁇ as they come from a conventional mill for the continuous hot rolling of such rods;
  • FIG. 2 is a sectional plan View of a rod guide in accordance with the invention.
  • FIG. 3 is a circuit diagram illustrating a portion of the control circuit -in accordance with the invention.
  • FIG. 4 is a circuit diagram illustrating another portion of the Icontrol circuit in accordance with the invention.
  • FIG. 5 is a. circuit diagram illustrating another portion of the control circuit in accordance with the invention.
  • steel Abillets may be heated to hot rolling temperature in a furnace (not shown) and rolled through a suitable hot rolling mill, which might be, for example, a conventional tandem-type hot rolling mill consisting of 20 roll stands. Roll stands 13-20 of such a mill are shown diagrammatically in FIG. l.
  • the rod being rolled is designated by the reference numeral 12.
  • the rod 12 After passing roll stand 14, the rod 12 is guided past a radiation pyrometer or other suitable temperature indicating device 21 and through a switch mechanism 22 onto a Alooping table 23. From the looping table 23 the rod 12 passes through finishing stand 25, which consists of roll stands 15-20.
  • the switch 22 may be moved to direct the rod across a looping table-24 and through another finishing stand 26.
  • the stand 26 consists of roll stands 1520. The path of the rod in this case is shown by the dashed line designated 12'.
  • the finishing stands 25 and 26 will be used alternately for rods being rolled from successive billets.
  • the rod 12 After leaving the finishing stand 25, the rod 12 is guided through a first cooling station 27, then through a second cooling station 28, then through a third cooling station 29, and then through a fourth cooling station 30.
  • the rod therefrom passes through a first cooling station 27', then through a second cooling station 28', then through a third cooling station 29', and then through a fourth cooling station 30'.
  • the cooling stations 27 and 27 may conveniently be provided with four cooling or quenching units each, the stations 28 and 28 with two each, and the stations 29, 29', 30 and 30 with one each.
  • the cooling medium may -be water or other suitable quenching liquid.
  • Rod from the fourth cooling station 30 is coiled on a takeup reel 34, while rod from the fourth cooling station 30' is coiled on a takeup reel 35.
  • the cooling stations 27 and 28 are separated by a length of guide pipe 36, the cooling stations 27 and 28' are separated by a length of guide pipe 37, the cooling stations 28 and 29 are separated by a length of guide pipe 38, the cooling stations 28' and 29' are separated by a length of guide pipe 39, the cooling stations 29 and 30 are separated by a length of guide pipe 40, and the cooling stations 29 and 30 are separated by a length of guide pipe 41.
  • the guide pipes 36-41 provide time for the temperature at the center of the rod and 4at the outside of the rod to equalize after each water cooling.
  • each Water cooling stand cools the surface of the rod more than it does the center.
  • a suitable Water separating or draining unit should be provided between each Water cooling station and its succeeding guide pipe.
  • the cooling stations land the water separating units may, if desired, be constructed in accordance with the teachings of the aforementioned Corson et al. application.
  • the rod 12 passes a radiation pyrometer or other suitable temperature indicating device 42.
  • the rod 12' passes a radiation pyrometer or other suitable temperature indicating device 43.
  • the radiation pyrometers 42 and 43 should be spaced from the preceding respective cooling stations by a distance sufiicient to allow the interior and surface of the rod to equalize substantially in temperature, a time of travel preferably not less than 0.3 second.
  • Water flow to the first cooling station 27 is controlled by a motor operated water valve 44.
  • Water flow to the rst cooling station 27 is controlled by a motor operated Water valve 45.
  • Water ow to the second, third and fourth cooling stations may be controlled by manually adjustable valves designated 45.
  • the finishing stands 25 and 26 may be driven by gear boxes 46 and 47, respectively.
  • the gear boxes 46 47 are in turn operated by Ithe motors 48 and 49, respectively.
  • the motor 48 is furnished with an electric tachometer 50, while the motor 49 is provided with an electric tachometer 5&1.
  • the rod passing radiation pyrometers 21, 42 and 43 should not ⁇ be permitted to move out of the field of focus of the pyrometer.
  • a pyrometer having a field of focus 1A in diameter may be used with a rod 3&6" in diameter, which will require the rod to be guided within i/g".
  • a guide may advantageously be used.
  • Hot rolled rod may have overfills, fins or other dimensional defects, and the guide must -allow such defects to pass through without causing a cobble.
  • the rod path past the radiation pyrometers may be controlled within a close tolerance by means of the offset guide arrangement illustrated in FIG. 2. It will be understood that -a rod guide ofthe type illustrated in FIG. 2, while not shown in FIG. l, may be used for each of the radiation pyrometers 21, 42 and 43.
  • the rod guide illustrated comprises four offset guide elements 71, 72, 73 and 74. As few as two guide elements can be used if desired.
  • Each guide element comprises a short, hollow, rectangular block 70 within which is carried a rectangular guide block 70A having an internal diameter decreasing (wall thickness increasing) toward the left in FIG. 2, which is the direction of travel of the rod through the rod guide.
  • the guide blocks are held in desired offset posi-V tions within the blocks 70 by means of screws 75 acting against their peripheral surfaces.
  • the guide blocks are xed vertically but may be moved horizontally by adjustment of screws 75.
  • the screws 75 are threaded through suitable holes provided in the walls of the blocks 70. Preferably, three or four screws 75 Will be used for each guide element.
  • each guide block 70A constitutes a h'ole v'76 through which the rod 12 may pass.
  • the guide blocks are offset from the center line of the guide elements by suitable adjustment of the screws 75.
  • the upper portion of the element 74 is in contact with the rod 12.
  • the lower portion of the block 70A contacts the nod 12.
  • the upper portion of the block 70A contacts the rod 12.
  • the element 71 contacts the rod 12.
  • the minimum diameter of holes 76 is considerably larger than the rod 12 (preferably at least three times the rod diameter) and is large enough to pass any variations in rod dimensions.
  • the guide elements 71-74 are spaced from each other sufficiently to permit dimensional defects to snake through.
  • the rod 12 may enter the rod guide through a pipe 77 and may leave the rod guide through a pipe 78.
  • the field of view of the optical pyrometer associated with the rod guide is designated 79. It will be lobserved that the guide blocks of the various guide elements are offset so as to maintain the rod 12 Within the field of focus of the optical pyrometer.4
  • a rod guide of the type shown in FIG. 2 may be provided for each of the radiation pyrometers.
  • each radiation pyrometer produces a D.C. volt-4 age which increases with rod temperature.
  • the radiation pyrometers 21, l42 and 43 are connected to recording controllers 52, S3 and 54, respectively.
  • These record ing controllers each produce a D.C. output voltage pro?I portional to the deviation of the indicated temperature from the control temperature.
  • each ⁇ controller is provided with a temperature or speed indieating pointer and with a manually operated controlA pointer which may be set at the desired control temperature.
  • the magnitude of the controller output-voltages is manually adjustable by means of potentiometers 61 and 62.
  • Ihe recording controllers 52-54 may be electronically operating machines of the type described in ⁇ Callender et al. Patent 2,175,985, issued October 10, 1939, and in Davis Patent 2,666,170, issued January l2, 1954.
  • tachometer 50 is connected to a recorder 55 and to a potentiometer 61, the 'output voltage of which is designated V1.
  • Tachometer 51 is similarly connected to a recorder 56 and to a potentiometer 62, whose output voltage is designated V2.
  • Radiation pyrometer 21 is connected to recording controller 52, which produces two output voltages designated V3 and V4.
  • Radiation pyrometer 42 is connected to recording controller 53, which produces an output voltage V7.
  • Radiation pyrometer 43 is connected to recording controller 54, which produces an output voltage V8.
  • the voltage V1 which is a portion of the output voltage of tachometer 50, as determined by the setting of potentiometer 61, is a D.C. voltage which increases with the speed fof motor 48.
  • the voltage V2 is a portion of the output Voltage of tachometer 51, as determined by the setting of potentiometer 62, and increases with the speed of motor 49.
  • the voltages V3 and V4 are D.C. voltages whose magnitude and polarity vary with the deviation in the temperature indicated by radiation pyrometer 21 from a desired control temperature set into recording controller 52.
  • the voltages V7 and V8 vary in magnitude and polarity with deviations in the temperature indications of radiation pyrometers 42 and 43, respectively, from the desired control temperatures as set into the recording controllers 53 and 54, respectively.
  • the voltages V1 and V3 are connected in series with each other and the combined voltage is applied to series connected capacitor 63 and resistor 65.
  • voltages V2 and V4 are connected in series with each other and the combined voltage is applied to series connected capacitor 64 and resistor 66.
  • the direction of connection of voltage V1 with voltage V3 and of voltage V2 with voltage V4 is chosen so that increase in rod temperature or increase in rolling speed changes the voltages in the same direction. For example, an increase in nod temperature above the preset control temperature may cause the voltage V3 to increase from zero to some positive value.
  • Capacitor 63 and resistor 65 preferably have a fairly large time constant, for example, one minute.
  • Capacitor 64 and resistor 66 should have a similar time constant.
  • the time constant of the RC circuits is related to the time required for a billet to be rolled into rod. For example, when the time for rolling one billet is one minute, the time constant should be at least one-half minute, and preferably one minute or more.
  • Normally open relay contacts F-l and normally closed relay contacts A-2 are connected in parallel with resistor 65 and are used to switch voltage V10 on and off in a manner to be described hereinafter.
  • Normally open relay contacts F-2 and normally closed relay contacts B-2 are each connected in parallel with resistor 66 for switching voltage V11 on and ot.
  • the output voltage of recording controller 53 i.e., voltage V7
  • V7 may be switched on or off by normally open relay contacts G-l and normally closed relay contacts A-3.
  • the resulting output voltage is designated V9.
  • voltage V8 may be switched on or oi by normally open contacts G-Z or normally closed contacts B-3, the resulting output voltage being designated V12.
  • Output voltages V9 and V10 are used as input voltages in the circuit of FIG. 4 and their end eect in this circuit is to control the movement of Water valve 44.
  • voltages V11 and V12 are used as input voltages in FIG. 4 and their end result is to control the operation of Water valve 45.
  • FIG. 4 In the upper part of FIG. 4 there is shown a bridge network comprising resistors A, 80B, 80C and 80D. Resistors 80A and 80B are interconnected through a potentiometer ⁇ 80, the slider 81 of which constitutes one terminal of the bridge. The opposite terminal of the bridge is formed by the junction of resistors 80C and 80D. The other two terminals of the bridge are formed by the junction of resistors 80A and 80C and by the junction of resistors 80B and 80D, respectively. IA source of constant D.C. voltage V15 is connected to these latter two bridge terminals.
  • the slider 81 is arranged to be driven by a reversible D.C. electric motor 82M, which motor also operates water valve 44.
  • One terminal of voltage V10 is connected to the slider 81.
  • the other terminal of voltage V10 and one terminal of voltage V9 are connected to one end of a potentiometer 82 and also to slider l85 of potentiometer 82 through normally open relay contacts A-4 and H-l.
  • Voltages V9 and V10 are connected in additive relationship.
  • the other end of potentiometer 82 is connected to the junction of resistors 80C and 80D through a series connection of a resistor 83 and a capacitor 84.
  • the voltage across series connected potentiometer 82 and resistor S3 is designated V17.
  • the free terminal of voltage V9 is connected to one input terminal of a D.C. amplifier S6.
  • the junction of resistor 83 and capacitor 84 is connected to the other input terminal of amplifier ⁇ 86.
  • the input voltage to amplifier 8'6 is designated V13.
  • the output of ampliiier 86 Vis applied to a pair of reversing relays 87 which control reversible electric motor 82M.
  • an output of amplifier 86 having a positive polarity will cause motor ⁇ 82M to rotate in one direction, while an output having the opposite polarity will cause motor 82M to rotate in the other direction.
  • the amplier input voltage V13 may be considered the bridge network output voltage.
  • the connections are such that presence of a Voltage V13 will cause electric motor 82M to rotate slider 81 in a direction or sense to reduce voltage V13 substantially to zero by balancing the bridge.
  • the bridge is thus a self-balancing one, Water valve 44, which controls the water supplied to the rst cooling station 27, is also operated by the motor 82M.
  • the water supplied to the first cooling station 27 is thus increased or decreased as the motor 82M is rotated in one direction or the other.
  • V9 a vloltage will exist at V9.
  • the magnitude of this voltage will be dependent upon the difference between the rod temperature and the control temperature, and its polarity will depend upon whether the actual temperature is above or below the control temperature.
  • V9 a voltage at V13 which will cause the bridge to rebalance by moving slider 81 and causing a change in voltage V17 which will exactly balance V9 and thus reduce voltage V13 to zero.
  • voltage V17 will gradually decrease toward zero as lcapacitor 84 becomes charged. If the rod temperature is still incorrect and voltage V9 persists, the bridge lwill rebalance again with another movement of slider 81.
  • Movement of slider 81 will continue until a position thereof is found at which the water ow controlled by the valve 44 causes the rod temperature at pyrometer 42 to coincide with the desired control temperature at that point. At this time the voltages V9 and V17 will both approach zero.
  • the rate of response of the reset action which causes the successive changes in the position of slider 81 will depend upon the time constant of the circuit including potentiometer 82, resistor 83 and Vcapacitor 8'4. This time constant may be changed manually by moving the slider 85 to vary the eiective resistance of potentiometer 82.
  • the magnitude of the increase or decrease in water ow for any given change in temperature may be altered by manual adjustment of potentiometers 61 or 62', and for any given change in speed by potentiometers 61 and 62. In operation these potentiometers are adjusted so that variations in temperature and speed are compensated for by variation in water ilow at the rst cooling stations 27 and 27' so that the rod leaving these cooling stations is substantially unchanging in temperature along its length.
  • the eect of change in position of slider 81 to balance V9 is to increase or decrease water flow in the tirst cooling stations-27 or 27 according to the deviation of temperature of, the rod at pyrometer location 42 from the control temperature at which the controller has been set.
  • controllers 52, 55 and 56 to reduce Variations of temperature along the length of the rod and it is the function of controllers 53 and 54 to maintain the rod temperature at the right magnitude.
  • FIG. 4 there is shown another bridge circuit identical with the one just described.
  • This bridge circuit which includes a potentiometer 88 and resistors 88A, 88B, 88C and 88D, is intended to control Water valve 45 and thus the cooling water supplied to cooling station 27' which acts on the rod 12'.
  • Potentiometer 88 is provided with a slider 89 corresponding to the slider 81.
  • Slider 93 and normally open relay contacts H-Z and B-4 correspond to slider 85, con- 'tacts H-l and contacts A-4, respectively.
  • the voltage V11 and voltage V12 are applied to this circuit and operate in the same way as the voltage V9 and the voltage V10, respectively, applied to the upper bridge circuit.
  • a D C. amplifier 94, a set of reversing relays 95, and a reversible D.C. electric motor 96 correspond to the elements 86, 87 and 82M, respectively, previously described.
  • the bridge output or amplifier input voltage is designated V14, while the voltage lacross potentiometer 90 and resistor 91 is designated V18. Variations in temperature or speed of the rod 12 will cause changes in voltages V11 and V12, which in turn will cause seliJbalancing of the bridge circuit in the lower half of FIG. 4 with a result- -8 ing change in the setting of water valve 45, in a sense to cause the rod temperature to approach the desired control temperature at radiation pyrometer 43.
  • the control circuit which has been described in connection with FIGS. 3 and 4 would be capable of maintaining a uniform temperature in a continuously running rod.
  • the rod in this case is rolled from individual billets so that at the location of radiation pyrometer 21 there will lbe intervals between successive rods during which the pyrometer will indicate a much lower temperature.
  • the same thing is true at the locations of radiation pyrometers 42 and 43, except that in this case the intervals of low temperature indication will be extended because the rods are switched alternately to the left-hand and right-hand sides of the mill.
  • the control as so far described would act to close the motor operated water valves during the time interval between rods. Consequently, the water pressure would be too low for the start ⁇ ing end of each subsequent rod and therefore each rod would be too hot at the start.
  • the proper amount of water pressure at the start of each rod is provided.
  • FIG. 5 there are shown two conductors 97 and 98, to which are applied a suitable supply voltage V.
  • a number of series circuits are connected across conductors 97 and 98.
  • One of these circuits includes the coil of a relay A and normally open contacts 53-1.
  • Normally open contacts 53-1 are located in recording controller 53 and are arranged to be closed at a predetermined temperature below the control temperature set into the controller 53.
  • the temperature at which the contacts 53-1 close is usually set at about 100 F. below the control temperature.
  • contacts 534 close when the indicated temperature reaches a temperature of about 100 F. below the control temperature. Closing of contacts 53-1 will result in energization of relay A.
  • Another circuit comprises the coil of a relay B and normally open contacts 54-1.
  • the contacts 54-1 are located in recording controller 54 and are set to operate in the same way as contacts 53-1 when a rod approaches pyrometer 43.
  • Another circuit is formed by a timer clutch coil C in series with normally open contacts 52-1.
  • Contacts 52-1 are located in recording controller 52 and are set to operate in the presence of a rod in the same way as contacts 53-1 and 54-1.
  • a series circuit formed by timer motor MC and a normally closed switch MC-l is connected across the clutch ⁇ coil C.
  • switch MC41 will be opened, stopping the motor MC.
  • clutch coil C will be de-energized and the clutch will be released, thereby resetting the timer for another timing cycle.
  • Anothr circuit is formed by relay coil D and normally open contacts A-1. Still another circuit is formed by relay coil E and normally open contacts B-1. The junction of contacts A-1 and coil D and the junction of contacts B-l and coil E are connected by a conductor 97.
  • a series circuit formed by a timer motor MD and a normally closed switch MD-1 is bridged between conductors 97' and 98.
  • a similar circuit formed by timer motor ME and a normally closed switch ME-l is likewise connected 'between conductor 97' and conductor 98.
  • a rst of these is formed by a relay coil F and a normally closed switch MC-Z.
  • a second is formed by relay coil G and a normally closed switch MD-2.
  • a third is formed by a relay coil H and a normally closed switch ME-Z.
  • timer MC When contacts 52-1 close, timer MC will be energized so that at a predetermined time later switch MC-Z Will open, deenergizing relay F.
  • relay B When contacts 54-1 close, relay B will be energized, closing contacts B-l and energizing timer motors MD and ME, so that at predetermined times later switches MD-Z and ME-Z will open, de-energizing relays G and H. Relays G and H will be similarly de-energized upon the closing of contacts 53-1. Opening of contacts 52-1 and A-1 or B-1 will result in prompt re-energization of the coils F, G and H.
  • control action on motor operated water valve 45 can only take place a selected time interval after a rod has arrived at the location of radiation pyrometer 43. This selected time interval is determined by the response time of the recording controllers. The control action which then occurs is such as to maintain the rod temperatures at the location of radiation pyrometer 42 or 43 equal to the desired control temperatures at these points and to adjust the water ilow to the incoming rod temperature level.
  • the timer MC is adjusted so that before it times out the recording controller reaches the temperature indication corresponding to the temperature of the rod.
  • switch MC-2 opens and de-energizes relay coil F. This in turn opens switch F-l, which has been short circuiting output voltage V10 from recording controller ⁇ 52.
  • the rod switch 22 is set for the rod to go down the side containing radiation pyrometer 42 and motor operated water valve 44
  • the temperature indication of recording controller 53 will rise until, at the temperature setting for contacts 53-1, these contacts will close, thereby energizing relay coil A.
  • Energization of relay A will open contacts A-2, which were also shorting the output voltage V10 from recording controller 52.
  • the associated recording controller 53 shows an increase in temperature which, when it arrives at a predetermined level, e.g., about 100 F. below the control temperature, closes contacts 53-1, thereby energizing relay A. This in turn closes contacts A-1 and operates clutch D and timer motor MD.
  • the timer MD is adjusted to allow time for the recording controller ⁇ 53 to reach a reading corresponding to the rod temperature before the timer times out.
  • switch MD-2 opens, de-energizing relay G, which in turn opens contacts G-1, which had been short circuiting output voltage V9.
  • reset action is involved in the valve control effected by voltages V9 and V12.
  • the amount of reset action depends upon the value of resistance of potentiometers 82 or 90. Reset is rapid when these resistances are low, giving a low time constant, and slow when they are high, giving a large time constant.
  • Contacts A-4, H-1, B-4 and H-2 operate to change the reset action. Assuming that the rod is to go down the side containing radiation pyrometer 42, when contacts 53-1 are closed in recording controller 53 and relay coil A is energized, contacts A-4 will be closed. Normally open contacts H-1 will also be closed at this time, because normally closed switch ME-2 is closed, so that relay coil H will be energized.
  • the setting of the motor operated water valve 44 at the start of the rod is determined by the voltage across capacitors 84, because before the start of the rod voltages V9, V and V17 are zero. Consequently, the voltage across capacitor S4 equals the voltage difference between the junction of resistors 80-C and 80-D and slider 81.
  • the position of the slider 81 is determined by the position of motor operated water valve 44.
  • V10 action of voltage V10 will cause the trailing end of a rod to receive more cooling water than the starting end, if this is necessary. If conditions are such that the rod temperature is substantially uniformtrom end to end, it may be satisfactory to have reset action taking place over the full length of the rod. In this case contacts A-4, H-l, B-4 and H-2 and timer ME would not be required. Sliders 85 and 93 would be connected directly to V10 and V11, respectively, in order to provide adjustable reset action which would be constant over the full length of the rod.
  • apparatus for heat treating rapidly moving hot rolled rod including a plurality of liquid quenching means for cooling said rod, said liquid quenching means being arranged at spaced intervals along the path of travel of said rod and each developing a sufficiently high rate of heat abstraction from said rod that a substantial temperature difference exists at the exit from each quenching means between the center and outside of said rod, the combination comprising means for determining the temperature of said rod at a selected point in said path located at a substantial distance from the preceding quenching means suicient for the interior yand surface of the rod substantially to equalize in temperature, and means responsive to the dilerence between said determined temperature and a predetermined control tempera- 12 ture for increasing or decreasing the supply of said quenching liquid to at least one of said quenching means depending upon whether said determined temperature is higher or lower than said predetermined control ternperature to cause said determined temperature to coincide with said predetermined control temperature.
  • apparatus for heat treating rapidly moving hot rolled rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod and each developing ⁇ a suiliciently high rate of heat abstraction from said rod that a substantial temperature dilierence exists at the exit from each cooling station between the center and outside of said rod
  • the combination comprising a radiation pyrometer for determining the temperature of said rod at a selected point in said path located at a substantial distance from the preceding cooling station suicient for the interior and surface of the rod substantially to equalize in temperature, and means responsive to the dijerence between said determined temperature and a predetermined control temperature for increasing or decreasing the supply of said cooling liquid to one of said cooling stations preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature.
  • apparatus for heat treating rapidly moving hot rolled rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod and each developing a sufliciently high rate of heat abstraction from said rod that a substantial temperature difference exists at the exit from each cooling station between the center and outside of said rod
  • the combination comprising la radiation pyrometer for determining the temperature of said rod at a selected point in said path located at a substantial distance from the preceding cooling station corresponding to the rod travel time of not less than about 0.3 second, and means responsive to the difference between said determined temperature and a predetermined control temperature for increasing or decreasing the supply of said cooling liquid to the rst one of said cooling stations depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide With said predetermined control temperature.
  • apparatus for heat treating rapidly moving hot rolled steel rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod and each developing a sufficiently high rate of heat abstraction 4from said rod that a substantial temperature diierence exists at the exit from each cooling station between the center and outside of said rod
  • the combination comprising means for determining the temperature of said rod at a selected point in said path located at a substantial distance from the preceding cooling station sufficient for the interior and surface of the rod substantially to equalize in temperature, means to produce a voltage whose magnitude is proportional to the diierence between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, and means responsive tothe magnitude and polarity of said voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature.
  • apparatus for heat treating rapidly moving hot rolled steel rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod, the combination comprising means for determining the temperature of said rod at a selected point in said path located at a distance from the preceding cooling station sufficient for the interior and surface of the rod substantially to equalize in temperature, means to produce a voltage whose magnitude is proportional to the difference between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, means responsive to the magnitude and polarity of said voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature, and means responsive to the magnitude and polarity of said Voltage for adjusting the supply of cooling liquid to said selected cooling station after a particular rod has been treated and prior to arrival of the succeeding rod to be treated.
  • ⁇ apparatus for heat treating rapidly moving hot rolled steel rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod, the combination comprising means for determining the temperature of said rod at a selected point in said path located at a distance from the preceding cooling station suicient for the interior and surface of the rod substantially to equalize in temperature, means to produce a voltage whose magnitude is proportional to the diierence between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, means responsive to the magnitude and polarity of said voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature, and means responsive to the magnitude and polarity of said voltage during a predetermined interval corresponding to travel of a first portion of a rod past said selected point for adjusting the supply of cooling liquid to said selected cooling station
  • apparatus for heat treating rapidly moving hot rolled steel rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod, the combination comprising means for determining the temperature of said rod at a selected point in said path located at a distance from the preceding cooling station suflicient for the interior and surface of the rod substantially to equalize in temperature, means to produce a voltage whose magnitude is proportional to the difference between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, means responsive to the magnitude and polarity of said voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature, and means responsive to the magnitude and polarity of said voltage during a predetermined interval for adjusting the supply of cooling liquid to said selected cooling station after a particular rod has been treated and prior to arrival of the succeeding rod to be treated, said
  • the combination comprising means -for determining the temperature of said rod -at a selected point in said path located ⁇ at a distance lfrom the preceding cooling station sufficient for the interior and sur-face of the rod substantially to equalize in temperature, means to produce a voltage whose magnitude is proportional to the diierence between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control tempenature, means responsive to the magnitude and polarity of said voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature, means responsive to the magnitude Iand polarity of said voltage during a predetermined interval lfor adjusting the supply of cooling liquid to said selected cooling station after
  • said 'additional switching means includes ⁇ a timer arranged to time said predetermined interval starting in response to approach of a rod to said selected point, said timer causing said additional switching means to increase the resistance value of said series circuit at the end of said predetermined interval.
  • apparatus -for heat treating rapidly moving hot rolled rod including a plurality of liquid quenching means arranged at spaced intervals lalong the path of travel of said rod, the combination comprising means for determining the temperature of said rod at la selected point in said path, controller means for producing a voltage having a magnitude proportional to the difference between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, valve means for increasing or decreasing the supply of said quenching liquid to at least ⁇ one of said quenching means, means responsive to the magnitude and polarity of said voltage for changing the setting of said valve means to increase or decrease the supply of said quenching liquid dependent on whether said determined temperature is greater or less than said predetermined control temperature, and switching means operatively connected to said controller means to suppress said voltage when said determined temperature is a predetermined value lower than said control temperature.
  • apparatus for heat treating rapidly moving hot rolled rod including ya plurality of liquid quenching means arranged at spaced intervals along the path of travel of said rod, the combination comprising means for determining the .temperature of Said rod at a selected point in said path, controller means for producing -a voltage having a magnitude proportional to the difference between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined Itemperature is higher or lower than Said predetermined control temperature, valve means for increasing or decreasing the supply of said quenching liquid to at least one of said quenching means, means responsive to the magnitude and polarity of said voltage for changing the setting of said valve means to increase or decrease the supply of said quenching liquid dependent on whether said determined .temperature is greater or less than said predetermined control temperature, yand switching means operatively connected to said controller means to suppress said voltage when said determined temperature is a predetermined value lower than said control temperature, suppression of said voltage being maintained for a predetermined time interval after said detenmined temperature exceeds said pre
  • apparatus for heat treating rapidly moving hot rolled rod including a plurality of liquid quenching means arranged at spaced intervals along the path of travel of said rod, the combination comprising means for detecting changes in temperature of said rod at a first selected point in said path prior to the first of said quenching means, means for increasing or decreasing the supply of said quenching liquid depending upon whether the temperature at said first point is increasing or decreasing, means for determining the ltemperature of said rod at a second selected point in said path located lat a distance from the preceding quenching means sufiicient for the 1interior and surface of the rod substantially to equalize in temperature, and means for increasing or decreasing the supply of said quenching liquid depending upon whether said determined temperature is higher or lower lthan a predetermined control temperature lto cause the determined temperature of said second point to coincide with said predetermined control temperature.
  • Apparatus as set forth in claim 14 comprising first and second controller means producing first and second voltages, said first voltage being independent in magnitude and polarity upon changes in temperature at said first selected point and said second voltage being dependent in magnitude and polarity upon the differences and direction of differences between said determined temperature and said control temperature, said first and second voltages being used for producing said increases or decreases in the supply of quenching liquid.
  • Apparatus as set forth in claim 15 comprising a valve mechanism for actually effecting the increases or decreases in supply of quenching liquid, motor means for operating said Valve mechanism, a normally balanced bridge circuit having a variable element, said motor means being electrically coupled to said bridge circuit for operation in response to unbalance of said bridge and being mechanically coupled to said variable element whereby operation of said motor means restores said bridge circuit toa balanced condition, and means to apply said rst and second voltages to said bridge circuit to unbalance said bridge circuit, resulting operation of said motor means tending to restore the balanced condition of said bridge and to reduce said second voltage toward zero.
  • Apparatus as set forth in claim 16 in which a capacitor is connected to said bridge circuit and is arranged to be charged by said second voltage.
  • first, second and third controller means each associated with a respective one of said pyrometers for producing first, second and third voltages, respectively, said first, second and third voltages being proportional in magnitude to the differences between the temperatures determined by said respective first, second and third pyrometers and respective first, second and third predetermined control temperatures, the polarity of each of said voltages being dependent on whether the
  • first, second and third controller means each associated with a respective one of said pyrometers for producing first, second and third voltages, respectively, said first, second Iand third voltages being proportional in magnitude to the differencesbetween the temperatures determined by said respective first, second and third pyrometers and respective first, second and third predetermined control temperatures, the polarity of each of said voltages being dependent o
  • apparatus for heat treating rapidly moving hot rolled steel rod including a plurality of liquid cooling stations arranged at spaced intervals along the path of travel of said rod, the combination comprising means yfor determining the temperature of said rod at a selected point in said path located at a distance from the preceding cooling station suicient for the interior and surface of the rod substantially to equalize in temperature, means to determine the speed of said rod, means to produce a rst voltage whose magnitude is proportional to the difference between said determined temperature and a predetermined control temperature and whose polarity is dependent on whether said determined temperature is higher or lower than said predetermined control temperature, means to produce a second voltage whose magnitude is proportional to the speed of said rod, control means responsive lto the magnitude and polarity of said first voltage and to the magnitude of said second voltage to increase or decrease the supply of cooling liquid to a selected cooling station preceding said selected point depending upon whether said determined temperature is higher or lower than said predetermined control temperature to cause said determined temperature to coincide with said predetermined control temperature and, means responsive to the magnitude and
  • Apparatus as set forth in claim 21, comprising second means for determining the temperature of said rod at a point in said path located in advance of said cooling stations, means to produce a third voltage whose magnitude is proportional to the difference between said -last mentioned determined temperature and a second predetermined control temperature and whose polarity is dependent on whether said last mentioned determined temperature is higher or lower than said second predetermined control temperature, and means to combine said third voltage with said second voltage to produce a fourth voltage which, with said iirst voltage, operates said control means to control said increases or decreases in supply of cooling liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Temperature (AREA)
US599187A 1956-07-20 1956-07-20 Rod patenting Expired - Lifetime US2994328A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE559389D BE559389A (enrdf_load_stackoverflow) 1956-07-20
US599187A US2994328A (en) 1956-07-20 1956-07-20 Rod patenting
GB22321/57A GB843619A (en) 1956-07-20 1957-07-15 Apparatus for heat-treating rapidly moving hot-rolled rod
FR1179609D FR1179609A (fr) 1956-07-20 1957-07-19 Appareil pour le traitement thermique d'une barre laminée à chaud en mouvement rapide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US599187A US2994328A (en) 1956-07-20 1956-07-20 Rod patenting

Publications (1)

Publication Number Publication Date
US2994328A true US2994328A (en) 1961-08-01

Family

ID=24398601

Family Applications (1)

Application Number Title Priority Date Filing Date
US599187A Expired - Lifetime US2994328A (en) 1956-07-20 1956-07-20 Rod patenting

Country Status (4)

Country Link
US (1) US2994328A (enrdf_load_stackoverflow)
BE (1) BE559389A (enrdf_load_stackoverflow)
FR (1) FR1179609A (enrdf_load_stackoverflow)
GB (1) GB843619A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091558A (en) * 1957-10-30 1963-05-28 Wean Engineering Co Inc Method of pickling
DE1508405B1 (de) * 1966-10-25 1970-07-30 Huettenwerk Oberhausen Ag Einrichtung zum Patentieren von Walzdraht in einem Waermetraegerfliessbett
US3613767A (en) * 1969-05-13 1971-10-19 Southwire Co Continuous casting and rolling of 6201 aluminum alloy
US3735966A (en) * 1971-06-07 1973-05-29 Schloemann Ag Method for heat treating steel wire rod
DE1758380B1 (de) * 1968-05-21 1973-07-12 Thyssen Niederrhein Ag Verfahren zur herstellung von walzdraht
JPS49105764A (enrdf_load_stackoverflow) * 1973-02-14 1974-10-07
JPS5080254A (enrdf_load_stackoverflow) * 1973-11-15 1975-06-30
US4046599A (en) * 1975-01-10 1977-09-06 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Processing wire rod
US4231553A (en) * 1977-03-30 1980-11-04 Schloemann-Siemag Aktiengesellschaft Apparatus for cooling rapidly moving rolled material
US4280857A (en) * 1979-11-05 1981-07-28 Aluminum Company Of America Continuous draw anneal system
US4507949A (en) * 1982-02-12 1985-04-02 Republic Steel Corporation Apparatus for cooling a hot-rolled product
US4786338A (en) * 1985-10-31 1988-11-22 Norio Anzawa Method for cooling rolled steels
US4986291A (en) * 1987-02-05 1991-01-22 Maschinenfabrik Andritz Actiengesellschaft Apparatus and process for the surface treatment of strips with liquids
US20080011394A1 (en) * 2006-07-14 2008-01-17 Tyl Thomas W Thermodynamic metal treating apparatus and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164204B (de) * 1960-03-19 1964-02-27 Kieserling & Albrecht Vorrichtung zum Richten von langgestrecktem, rundem Richtgut
CN109794521B (zh) * 2019-01-31 2020-05-15 中冶华天工程技术有限公司 一种棒线材穿水的强力快冷装置

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350618A (en) * 1920-08-24 Chusetts
US2111919A (en) * 1937-12-10 1938-03-22 Bertis H Urschel Heat-treating apparatus
US2163699A (en) * 1938-04-16 1939-06-27 George F Paul Method and apparatus for rolling hot strip material
US2205182A (en) * 1939-02-08 1940-06-18 Brown Instr Co Automatic control apparatus
US2309745A (en) * 1940-10-14 1943-02-02 American Steel & Wire Co Method of processing wire
US2436894A (en) * 1944-02-21 1948-03-02 Port Colborne Iron Works Ltd Fair-lead for cables, ropes, and the like
US2470540A (en) * 1943-10-08 1949-05-17 Mission Mfg Co Protective sleeve for pump rods
US2492434A (en) * 1942-12-08 1949-12-27 Mueller Co Projectile quenching apparatus
US2661009A (en) * 1949-10-24 1953-12-01 Gen Electric Strip pickling apparatus and saturable reactor control therefor
US2668701A (en) * 1951-02-03 1954-02-09 Selas Corp Of America Heating control system
US2681793A (en) * 1948-11-13 1954-06-22 Byron Jackson Co Wire line guide
US2681874A (en) * 1948-04-28 1954-06-22 Robert J Linney Method of preferentially heat treating steel articles
US2725265A (en) * 1951-11-26 1955-11-29 Thompson Prod Inc Valve stem guides
US2747587A (en) * 1950-03-13 1956-05-29 United States Steel Corp Apparatus for quenching and reeling rods

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350618A (en) * 1920-08-24 Chusetts
US2111919A (en) * 1937-12-10 1938-03-22 Bertis H Urschel Heat-treating apparatus
US2163699A (en) * 1938-04-16 1939-06-27 George F Paul Method and apparatus for rolling hot strip material
US2205182A (en) * 1939-02-08 1940-06-18 Brown Instr Co Automatic control apparatus
US2309745A (en) * 1940-10-14 1943-02-02 American Steel & Wire Co Method of processing wire
US2492434A (en) * 1942-12-08 1949-12-27 Mueller Co Projectile quenching apparatus
US2470540A (en) * 1943-10-08 1949-05-17 Mission Mfg Co Protective sleeve for pump rods
US2436894A (en) * 1944-02-21 1948-03-02 Port Colborne Iron Works Ltd Fair-lead for cables, ropes, and the like
US2681874A (en) * 1948-04-28 1954-06-22 Robert J Linney Method of preferentially heat treating steel articles
US2681793A (en) * 1948-11-13 1954-06-22 Byron Jackson Co Wire line guide
US2661009A (en) * 1949-10-24 1953-12-01 Gen Electric Strip pickling apparatus and saturable reactor control therefor
US2747587A (en) * 1950-03-13 1956-05-29 United States Steel Corp Apparatus for quenching and reeling rods
US2668701A (en) * 1951-02-03 1954-02-09 Selas Corp Of America Heating control system
US2725265A (en) * 1951-11-26 1955-11-29 Thompson Prod Inc Valve stem guides

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091558A (en) * 1957-10-30 1963-05-28 Wean Engineering Co Inc Method of pickling
DE1508405B1 (de) * 1966-10-25 1970-07-30 Huettenwerk Oberhausen Ag Einrichtung zum Patentieren von Walzdraht in einem Waermetraegerfliessbett
DE1758380B1 (de) * 1968-05-21 1973-07-12 Thyssen Niederrhein Ag Verfahren zur herstellung von walzdraht
US3613767A (en) * 1969-05-13 1971-10-19 Southwire Co Continuous casting and rolling of 6201 aluminum alloy
US3735966A (en) * 1971-06-07 1973-05-29 Schloemann Ag Method for heat treating steel wire rod
JPS49105764A (enrdf_load_stackoverflow) * 1973-02-14 1974-10-07
JPS5080254A (enrdf_load_stackoverflow) * 1973-11-15 1975-06-30
US4046599A (en) * 1975-01-10 1977-09-06 Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie Processing wire rod
US4231553A (en) * 1977-03-30 1980-11-04 Schloemann-Siemag Aktiengesellschaft Apparatus for cooling rapidly moving rolled material
US4280857A (en) * 1979-11-05 1981-07-28 Aluminum Company Of America Continuous draw anneal system
US4507949A (en) * 1982-02-12 1985-04-02 Republic Steel Corporation Apparatus for cooling a hot-rolled product
US4786338A (en) * 1985-10-31 1988-11-22 Norio Anzawa Method for cooling rolled steels
US4986291A (en) * 1987-02-05 1991-01-22 Maschinenfabrik Andritz Actiengesellschaft Apparatus and process for the surface treatment of strips with liquids
US20080011394A1 (en) * 2006-07-14 2008-01-17 Tyl Thomas W Thermodynamic metal treating apparatus and method

Also Published As

Publication number Publication date
GB843619A (en) 1960-08-04
FR1179609A (fr) 1959-05-27
BE559389A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US2994328A (en) Rod patenting
US3604234A (en) Temperature control system for mill runout table
US2773161A (en) Combination control system for continuous heat treatment
JPS587366B2 (ja) ストリツプオ レイキヤクスル ホウホウ
US2815500A (en) Monitoring system for continuously selecting extreme variables
US2041029A (en) Method of treating metal
US2136559A (en) Temperature control system
US2872173A (en) Method and apparatus for heat treating materials in a continuous operating furance
US3252693A (en) Control system for continuous annealing lines and the like
US3186201A (en) Production of metal strip
US2059976A (en) Apparatus for treating metal
US3560712A (en) Stress-relieving apparatus
US2593562A (en) Control system
US3151508A (en) Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths
JP7522998B2 (ja) 熱延鋼帯の焼鈍方法及びその焼鈍方法を用いた電磁鋼板の製造方法
US1815061A (en) Control system
US3328554A (en) Wire heater
US2285288A (en) Automatic control apparatus
US3739132A (en) Power control circuit for resistance heating moving conductors
US3824366A (en) Process and apparatus for annealing the weld bead of a welded metallic tube
JP2555116B2 (ja) 鋼材の冷却制御方法
US2897698A (en) Continuous treatment of metal strip
US3625421A (en) System for controlling furnace temperatures without overshoot
US2983170A (en) System for controlling the gage of strip produced by a continuous rolling mill
US5006061A (en) Method for bringing a plurality of steel slabs to rolling temperature in a furnace