CN1285245A - Hot-rolling equipment and rolling method thereof - Google Patents

Hot-rolling equipment and rolling method thereof Download PDF

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Publication number
CN1285245A
CN1285245A CN00124257A CN00124257A CN1285245A CN 1285245 A CN1285245 A CN 1285245A CN 00124257 A CN00124257 A CN 00124257A CN 00124257 A CN00124257 A CN 00124257A CN 1285245 A CN1285245 A CN 1285245A
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rolling
equipment
mentioned
steger
rolled stock
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小林裕次郎
梶原利幸
芳村泰嗣
堀井健治
平野聪
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Hitachi Ltd
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Hitachi Ltd
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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
    • C21D9/68—Furnace coilers; Hot coilers
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • 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
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B2013/003—Inactive rolling stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/021—Twin mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/16—Two-phase or mixed-phase rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • 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
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, 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
    • 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
    • B21B45/04—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 de-scaling, e.g. by brushing
    • B21B45/08—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 de-scaling, e.g. by brushing hydraulically

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

At at least one side of the entrance and exit of the Shitegeer rolling mill, a furnace with winders is disposed in the furnace. In the furnace with winders which disposed at at least one side of the entrance and exit of the Shitegeer rolling mill and the Shitegeer rolling mill, it is arranged a temperature controller for adjusting temperature of rolled material in rolling mill. Thereby, an improved operation of the Shitegeer rolling mill is obtained.

Description

Equipment of hot rolling and milling method
The present invention relates to equipment of hot rolling and milling method.
In recent years, in order to make the product of high strength, high tenacity etc., proposed a lot about the material composition of high-grade carbon steel and the scheme of manufacture method.The flat 7-18381 communique of Japanese kokai publication hei 10-147843 communique and Te Kai is for example arranged.
In addition, the spy opens flat 10-277601 communique, is the hot strip mill equipment and technology of having considered various manufacturing processes.In addition, about the wriggling control of rolled stock rear end, as the spy opens flat 9-38710 communique record, need very height and delicate control.
Open flat 11-702 communique the spy, the spy opens in flat 9-239413 number, has disclosed the rolling equipment of the so-called two milling trains of the employing of having assembled 2 groups of rolls in a casing.
But, in the high-quality carbon steel that adopts the said equipment rolling, also exist the problem of metal structure.One of problem is that the temperature of end reduces big before and after the rolled stock.Like this, the metal structure of rolled stock length direction is inhomogeneous, causes yield rate low.In order to address this problem, special fair 5-45327 communique has disclosed a kind of equipment, in this equipment, the 1st heater is set between milling train and furnace coiler, the temperature that prevents end, the rolling material front and back reduces, and, on the hot run table between milling train and the downcoiler, the 2nd heater is set, makes the rolled stock bulk temperature even.In addition, in No. 5755128, the United States Patent (USP), configuration heater and cooling device in the Steger rolling equipment have been proposed also, the invention that is rolled with even temperature.The main purpose of these inventions is to make the rolled stock temperature even, makes the quality of rolled stock even, and improves yield rate.But, in these inventions,, all not mentioned for obtaining milling method high strength material etc., that increase substantially rolling quality.
In addition, in the above-mentioned conventional example, also has other big problem.These problems are that owing to be provided with heater or cooling device between the furnace coiler of milling train, so the distance between milling train and furnace coiler extends, it is difficult that operation task becomes.
Usually, precipitate is preferably fine and be evenly dispersed in the metal structure.Like this, can prevent the growth hypertrophy of metal structure crystal grain very effectively.But, as document " exploitation that the NbC during austenite region hot-working in the low carbon element Nb steel separates out pattern " iron and steel the 75th year (1989) No. 6 disclose, implement that rolling to add the speed of separating out in man-hour normally very fast.And in the Steger rolling equipment, the rolled stock that is rolled processing is by the operation of carrying out repeatedly batching in stove, keeping, so precipitate mainly concentrates on grain boundary and hypertrophyization.
In addition, well-known, the crystal grain of metal structure is thin more good more, can improve intensity like this.For example, in the 2.2nd chapter of " controlled rolling, control cooling " that Japanese iron and steel institute publishes, put down in writing the yield stress of mother metal and the square root of crystal grain and be inversely proportional to, be the relational expression of Hall-Petch.For this point, the Steger rolling equipment that at high temperature batches the maintenance operation chronically repeatedly is not good.This is that the crystal grain of metal structure is grown up loose more because the time at high temperature is long more.
As mentioned above, in the equipment of existing employing hot strip mill, though can carry out high-quality rolling,, equipment is very large-scale and expense is high, for various rolling manufacturing processes, may not be optimal equipment.In addition, in the milling method of existing Steger rolling mills, as mentioned above, the quality of the metal structure in high-quality carbon steel existing problems.But, the Steger rolling equipment is compared with existing hot strip rolling equipment, and its advantage is that installation cost is low, also much shorter of device length, if can solve the quality problems of metal structure, then for middle small capacity kind how, can be described as optimal rolling equipment.
The objective of the invention is to improve the operability and the product quality of Steger rolling equipment.
Equipment of hot rolling of the present invention has the Steger rolling equipment, and in this Steger rolling equipment, input side and outlet side at milling train are provided with the furnace coiler that has coiling machine in stove; It is characterized in that, at least one side at the input side and the outlet side of above-mentioned Steger rolling equipment, be arranged on the furnace coiler that has coiling machine in the stove, be located between above-mentioned Steger rolling equipment input side and at least one side's of outlet side the furnace coiler and this Steger rolling equipment, be provided with adjusting by the device of the rolled stock temperature of above-mentioned mill milling.
Hot-rolling method of the present invention is rolled with the equipment of hot rolling that has a Steger rolling equipment, and this Steger rolling equipment is provided with the furnace coiler that has coiling machine in stove at the input side and the outlet side of milling train; At least one side at the input side and the outlet side of above-mentioned Steger rolling equipment is configured in the furnace coiler that has coiling machine in the stove; Be located between above-mentioned Steger rolling equipment input side and at least one side's of outlet side the furnace coiler and this Steger rolling equipment, be provided with the device of regulating the rolled stock temperature; It is characterized in that, comprise with above-mentioned milling train rolling at least once rolling process, the heat treatment step of heat-treating with the device of regulating the rolled stock temperature behind this rolling process, behind this heat treatment step rolling at least rolling process once.
In addition, (the 1st and the 2nd furnace coiler is at the input side and the outlet side of milling train having the 1st (input side) and the 2nd (outlet side) furnace coiler, in stove, have coiling machine) the input of Steger rolling equipment, outlet side either party, preferably import the side, be provided with the 3rd furnace coiler, between the 3rd furnace coiler and the 1st or the 2nd furnace coiler, be provided with the heater of heating rolling material and the cooling device beyond the derusting device, perhaps, input side or outlet side at above-mentioned Steger rolling equipment, setting has the middle devices for taking-up of the 3rd and the 4th furnace coiler, in middle devices for taking-up, heater and/or cooling device are set, level(l)ing machine is set in its vicinity.In addition, the milling train of Steger rolling equipment is at least the two milling trains more than 1, and derusting device and hot-rolling oil feedway preferably are set.
In addition, the milling method of above-mentioned equipment of hot rolling is, to being rolled once above rolled stock at least, at least implement once above while batching and/or roll out the heat treatment step that heats and/or cool off, be preferably in a preceding mill train of final mill train and implement, heat treated is to be heated to more than the solid solubility temperature of rolled stock carbide precipitate, after implementing at least once to batch, keep the maintenance operation of certain hour, carry out once above rolling processing and handle, cooling then.In addition, with cooling device and the heater beyond near the derusting device that is located at the heater, more than at least once, batch, roll out in the process, at least implement once the heat treatment process of above heating cooling, in rolling process thereafter, adopt hot-rolling oil, the rolled stock temperature before the final rolling beginning is set at austenitic not crystal region or ferrite zone or ferrite and austenitic mixing 2 alpha regions.Final accumulation reduction ratio when rolling is more than 50%, to be preferably more than 60%.
Fig. 1 is the rolling equipment allocation plan of one embodiment of the invention.
Fig. 2 is the rolling equipment allocation plan of one embodiment of the invention.
Fig. 3 is the rolling equipment allocation plan of one embodiment of the invention.
Fig. 4 is the rolling equipment allocation plan of one embodiment of the invention.
Fig. 5 is the rolling equipment allocation plan of one embodiment of the invention.
(embodiment 1)
Fig. 1 represents embodiments of the invention.
Milling train is so-called two milling trains 2 that group has been gone into 2 groups of roller groups in 1 casing, has disposed so-called the 1st, the 2nd furnace coiler at the input side and the outlet side of this pair milling train 2.1st, the 2nd furnace coiler is provided with coiling machine 4L and coiling machine 4R respectively and constitutes in heating furnace 3L, 3R.The said equipment is the Steger rolling equipment.Here said pair milling train 2 is reversible mills of reversible rolling.
In the present embodiment, between two milling trains 2 and furnace coiler, be provided with the derusting device 7 of band rust cleaning nozzle.In order to carry out the rolling of carbon steel, the rust cleaning nozzle is to rolled stock jet surface high-pressure fluid.In addition, also be provided with the nozzle 8 that sprays hot-rolling oil.
The rolled stock of sending from the slab heating furnace that do not show of figure etc. 1, removed the rust on rolled stock surface by derusting device 7, simultaneously by two milling train 2 repeat-rollings, when its thickness of slab becomes the 25mm left and right sides that can batch, by guidings such as pinch roll 11, local derviation roll 12 and rolled stock guiding devices 13, batch by coiling machine 4L or 4R.
In the reversible rolling afterwards, ( coiling machine 4L and 4R) batches by the 1st and the 2nd furnace coiler, and meanwhile repeatedly rollback be rolled down to final thickness of slab, then, after the cooling device on the discharging roller-way 14 cooling, batched by downcoiler 15.
In addition, when rolling general carbon steel, can remove the rust on rolled stock surface as required with derusting device 7.In the Steger rolling equipment, be rolled in this wise.
In the present embodiment, be that the input side at above-mentioned Steger rolling equipment disposes the 3rd furnace coiler.The 3rd furnace coiler is provided with coiling machine 10 and constitutes in heating furnace 9.In addition, at the 1st furnace coiler that has coiling machine 4L and have between the 3rd furnace coiler of coiling machine 10, the cooling device 6 and the heater 5 of the variations in temperature that makes rolled stock 1 is set.
Like this, owing between the 1st furnace coiler of two milling trains 2 and its input side, heater and cooling device are not set, so, batch the good operability in the operation of rolling, solved one of problem of above-mentioned known example.In addition, heater 5 and cooling device 6 be not owing to be arranged between two milling trains 2 and the 1st or the 2nd furnace coiler, so the length of this heater 5 and cooling device 6 is compared with known example, its length is unrestricted for rolling operability, can freely set.That is, owing at milling train and be configured between the furnace coiler of its input side or outlet side, do not dispose heater and cooling device, so, can not impair functionally being rolled of reversible rolling.
In addition, owing to be configured between the furnace coiler and other furnace coiler of milling train input side or outlet side, heater and cooling device are set, its length is unrestricted, the heater of configurable suitable length and cooling device can improve the quality of rolled stock 1.
Below, the milling method of the 3rd furnace coiler and heating, cooling device is described.In the existing Steger rolling mills, in a mill train of the final tight front of mill train, rolled stock 1 is output side coiling machine 4R and rolls out, and the coiling machine 4L by input side batches by rolling one side, two milling trains 2 one side.And in the present embodiment, input side coiling machine 4L does not batch, by the heater in the way 5 heating on one side, by 3rd coiling machine be coiling machine 10 batch on one side.Follow final rolling in, the rolled stock 1 that rolls out from coiling machine 10, be heated or cooled as required, and meanwhile rolling by two milling train 2, after 14 coolings of the laminar flow formula cooling device on the discharging roller-way, batch by downcoiler 15.At this moment, the control of the temperature of rolled stock 1 is measured by Temperature Detector 16, by control device 17 control heater 5 or cooling devices 6, makes its temperature that achieves the goal.
In the mill train of the tight front of above-mentioned final mill train (hereinafter referred to as the logical plate of heating (logical plate: make sheet material pass through milling train) mill train), preferably be not rolled or extremely gently depress (for example 5% below) and lead to plate with low speed.Like this, can prevent to reduce because of rolled stock 1 contacts the temperature that causes rolled stock 1 with roll.Can will be heated to the necessary length restriction of heater 5 of target temperature in Min..
But, when milling train is when adopting two milling train 2, to lead to plate Yi Bian also can extremely gently depress.That is, in the milling train of 1 common milling train, even depress slightly, during tension free rolling before the front end of rolled stock 1 arrives coiling machine 10, the danger of wriggling etc. is very high.At this moment, preferably do not depress fully and with the logical plate of low speed.But in two milling trains 2, the distance of roll shop building is short, and rolled stock is constrained on therebetween, so the stability of logical plate significantly improves, does not produce the problems referred to above.
Below, the action when explanation adopts the rolling equipment of above-mentioned present embodiment to be rolled successively.
When adopting the Steger rolling equipment to be rolled, as described above about the problem of metal structure.Problem is the method that prevents the carbide precipitate hypertrophyization.In the common operation of rolling, make and concentrate huge carbide precipitate miniaturization and the evenly dispersion that produces, be very difficult.
And have in the present device of heater 5, in the logical plate mill train of heating, rolled stock 1 is heated to carbide precipitate in the above austenite region of austenite transient point (A3 point) on one side again more than the solid solubility temperature, batch with furnace coiler on one side, after keeping required time, can be effectively with the carbide precipitate solid solution again of separating out in the rolled stock.This kind of this heater 5 utilizes method, and all records in No. 5755128, known example formerly, special fair 5-45327 number and the United States Patent (USP) we can say that it utilizes purpose different in essence.That is, in the above-mentioned known example heater utilize purpose, be the equalizing temperature of realizing the front and back end temperature control of rolled stock or making the rolled stock total length, rather than as the present invention so the positive metal structure that improves rolled stock.
Especially, the rolled stock 1 that is batched by coiling machine 10 is kept required time in stove 9, this is very important for the solid solution again of carrying out carbide precipitate effectively.
But the method for utilizing of above-mentioned heater 5 also has other purpose.That is, usually, near final mill train rolling, below about 900 ℃, the rolled stock temperature reduces (reduction of this temperature is different different because of the thickness of slab of converted products).When rolled sheet metal etc., in ausrolling, sometimes must general saidly allow lower limit temperature, below the A3 point.
To this, carry out the temperature of the solution treatment of carbide precipitate, usually more than 1000 ℃, this means and must carry out sizable heating that heater must maximize and the furnace superintendent of heating furnace must extend.Therefore, in the mill train that heats for solution treatment, while, as previously mentioned, have the effect that shortens the heating furnace furnace superintendent with not being rolled or leading to the method that plate heats with extremely light pressure and low speed ground.
But in order to do one's utmost to reduce to add thermal capacity, desirable way is to make the logical non-contiguously plate of roller and rolled stock.But problem is arranged so also.That is, when roller and rolled stock were placed for a long time with contactless state, roller was cooled, and the hot exapnsion of roller that produces in before this rolling changes roller surface profile (heat protuberance).This problem is, the shape control of ensuing final rolled stock in rolling might change the shape control method that carries out in rolling before.From the easiness this point of shape control, this is not desirable.In the mill train that heats for solution treatment, the cooling of the roll that carries out usually is to control the water yield that is ejected into the cooling fluid (roller cooling fluid) on the roller few, does not perhaps spray, and like this, can reduce the variation of heat protuberance effectively.About this problem, the back illustrates another effective milling method.
Therefore the thin more easy more heating of rolled stock, can make heater 5 miniaturizations.This means with the solution treatment to be the heat treated of purpose, the mill train before final mill train is effective.
In addition, thickness of slab is thin more, and the thickness of slab direction Temperature Distribution after the Fast Heating is even more, and solution treatment can simply and evenly fast, this also be one of above-mentioned reason.
That is, the general objectives of above-mentioned solution treatment, every 25mm thickness of slab needs about 0.5 hour retention time.Therefore, thickness of slab is 2.5mm when carrying out solution treatment, and the retention time in stove is to get final product in 3 minutes, and the retention time can be few more in the thin more stove of thickness of slab, has the effect that improves productivity and quality.But, change the necessary retention time of taking behind the logical plate of heating, relevant with the minimizing of output (because of thickness of slab different), about this point, the milling method of boosting productivity is described in the back also.
In addition, with the purpose of high temperature maintenance rolled stock, be in order to overcome the growth hypertrophyization of metal structure crystal grain.Therefore, if do not keep, then can not solve the low problem of strength of parent as previously mentioned.But about this point, as putting down in writing in document " controlled rolling, control technology " the 2.2nd chapter, the key factor of decision ferrite crystal grain depends on the not accumulation reduction ratio of crystallization austenite region.The document that clearly reveals this point also has: Nippon Steel's skill reports No. 365 (1997) " to depress rolling technique greatly in the slab dual crossing milling train " etc.
According to above-mentioned document etc., the accumulation reduction ratio is 50% when following, and ferrite particle diameter reduces with above-mentioned reduction ratio with being directly proportional, more than 50%, be preferably in 60% when above, demonstrate saturated.
Therefore, by implementing the solution treatment of present embodiment, the crystal grain of thickization after this not under the suppressing of crystallization austenite region, becomes fine ferritic crystal grain.
Usually, carry out depressing more than 50% with a milling train, because of rolling loading is big, shape control also is not easy, so be very difficult.Therefore, some milling trains preferably are set.Especially consider from the operational stability aspect that as previously mentioned, it is optimal using two milling trains.
After rolling as described above, rolled stock is batched by downcoiler 15 after being set at cooling device 14 cooling on the outlet side discharging roller-way, becomes product.In the cooling of this discharging roller-way, be the key factor of decision end product quality, this point is same with controlled rolling technology before.That is, in the milling method of present embodiment, the carbide that solid solution is separated out is separated out after the above-mentioned cooling device cooling again." rolled stock after the employing solution treatmentization " described here is meant the major part that remains in the carbide precipitate in the final products, is to be generated by the cooling on the above-mentioned discharging roller-way.
Therefore, according to the cooling on the rolling steel grade control discharging roller-way, can separate out control with rolling irrespectively, carry out carbide the most suitable before the solution treatment.Specifically, fine carbide is evenly spread in the mother metal.Like this, can be suppressed on this roller-way, can improve product strength, and reduce the solid solution carbon amount in the mother metal, can produce the product that is rich in toughness from the growth of austenite to the ferrite crystal grain of ferrite metamorphosis.
It more than is the basic imagination of the new rolling manufacturing process that is applicable to milling method and rolling equipment of present embodiment proposition.Specifically, in ausrolling, implemented rolling after the solution treatment, be preferably in not the crystallization austenite region carries out.The temperature that this means rolled stock is rolling in from the A3 transient point to about 950 ℃ of scopes.Therefore, in the solution treatment of present embodiment,,, preferably carry out the cooling after the solution treatment in order in above-mentioned scope, to be rolled effectively when temperature rises to above-mentioned scope when above.
As cooling device, though also can adopt derusting device 7, the temperature that had better not adopt the inconsistent device of purpose original to come the controlled rolling material with it.The original purpose of derusting device 7 is to remove the rust on rolled stock surface, and therefore, it is usually with 100kg/cm 2Above high-pressure fluid is ejected into the rolled stock surface in large quantities.And adopt such device to control temperature, and necessary controlled pressure, flow etc., in fact very difficulty can be described as the not high using method of efficient.
If purpose is exactly for the cold rolling material, then do not need such high-pressure fluid, for example, the special-purpose cooling device 6 that can adopt laminar flow formula cooling etc. to adopt before.But at this moment, before final rolling several mill traines, carry out the follow-up rolling of solution treatment, become the rolling of crystallization austenite region not, also can go into this cooling device in the rolling process for 6 groups in order to make.
Especially carrying out ferrite when rolling, adopt above-mentioned cooling device 6 or/and derusting device 7 is controlled at below the A3 transient point.When thickness of slab is thicker, when the ability of the cooling device of setting did not reach after the solution treatment once the predetermined temperature of cooling, the also non-as-rolled condition of several times or the common operation of rolling repeatedly were up to the cooling that can reach predetermined temperature.Two milling trains 2 extend with the distance of coiling machine 10, have any problem in the operation but at this moment.To this, proposed in another embodiment can simple operations new equipment.
Use the said equipment, at least in rolling after solution treatment, coating hot-rolling oil in rolling more than the mill train has special effect at least.By adopting hot-rolling oil, can reduce the frictional force between roller and rolled stock, reduce rolling loading, moment etc.This zerolling for the rolling grade of ferrite is particularly effective.
The following describes another subsidiary effect of present embodiment, that is, as mentioned above, for the ferrite particle diameter that reduces finally to obtain, improving the accumulation reduction ratio is effective way.At least in rolling after solution treatment, wish to have the high reduction ratio of trying one's best.Rolling in order to realize under the high pressure, do one's utmost to make the roll minor diameterization.From rolling stability, wish that the driving force of operation roller is big.But, since drive system, particularly main shaft to allow that moment is suppressed to less, so can not transmit big moment.In order to relax this restriction, in rolling after the solution treatment of the high reduction ratio of hope, adopt hot-rolling oil, can carry out the rolling of high reduction ratio, so, can make the miniaturization of metal structure particle diameter, improve the quality.
In addition, and organizing relevant direct effect, is the frictional force that has reduced between roller and rolled stock, reduces the shearing force between rolled stock and roller.This means that near the partial cut distortion the rolled stock top layer reduces, and makes rolling structure even in the thickness of slab direction.Improve purpose of the present invention, that produce even high-quality material like this, more.
In embodiment illustrated in fig. 1, be to adopt two milling trains, but common 1 or several milling trains also have same effect as milling train.In addition, for heating effectively, heater preferably adopts electromagnetic induction heating.Also can roughing mill be set, some finishing mills are set in the back at the upstream side of such Steger rolling equipment.In addition, if finishing mill is set, then more can strengthen the accumulation reduction ratio of final mill train at rear flow side.
In addition, among Fig. 1 the situation of representing to be provided with simultaneously cooling device 6 and heater 5, according to rolling steel grade, for example also heater 5 can only be set.In addition, expression is arranged on the situation of upstream and downstream to heater 5 and cooling device 6 among Fig. 1, but also they can be arranged on a side.For example, heater 5 is arranged on upside, cooling device 6 is arranged on its downside etc.In addition, by controlling above-mentioned heating and/or cooling, it is rolling to carry out 2 phases (austenite and ferritic line and staff control) simply.
In addition, as mentioned above, the logical plate process of heating, a mill train in final mill train front is effective.But be not limited thereto, so long as the thickness of slab that can batch can be implemented in the mill train afterwards arbitrarily as required.(embodiment 2)
Fig. 2 is that explanation is applicable to milling method embodiment illustrated in fig. 1, can improve output and solve above-mentioned heat protuberance.Among Fig. 2, the rolled stock that expression is rolled earlier (material 1a in advance) remains in the stove 9 after being reeled by the 3rd coiling machine 10, the state of rolling next rolled stock (back row material 1b).The front end of material 1a is clamped by pinch roll 11 in advance, and the lowering or hoisting gear by the pinch roll 11 of scheming not show is lifted to more than the mill train line.This is for long as back row material 1b and when having surpassed the 3rd furnace coiler, prevents and its mutual interference mutually.Like this, after material 1a is heated logical plate in advance, can carry out the rolling of back row material 1b immediately.The rolling beginning of back row material 1b also becomes in the time of can batching state, if do not disturb with the 3rd coiling machine, then clamps the pinch roll 11 of material 1a front end in advance and returns position on the normal mill train line, gets back to final rolling SBR.
Back row material 1b is reeled by the 2nd coiling machine 4R before the logical plate mill train of heating, and front end is clamped by pinch roll 11, standby on the mill train line.At this state, after the carbide precipitate solid solution of material 1a in advance and keeping the sufficient time, implement the finally rolling of material 1a in advance immediately.After the rolling end of material 1a, clamp the pinch roll 11 of back row material 1b front end in advance, return position on the normal mill train line, the logical plate of heating is handled and is begun immediately.
The advantage of the rolling method even be also can be rolled, can improve output in the required heating retention time.In addition, in the logical plate of heating of material 1a in advance, the operation roller is cooled, even the heat protuberance has big variation, because that back row material 1b is continued is rolling, so when material 1a in advance final rolling, the heat protuberance becomes constant approximately state, does not influence shape and controls.That is, can improve productivity and shape quality.
Back row material 1b's is rolling, is that the thick position of slave plate begins, also few to the influence of shape so some changes even the heat of roller is swelled, and does not become problem.(embodiment 3)
Fig. 3 represents application examples of the present invention.
The Steger rolling mills rolling equipment that has furnace coiler is identical with Fig. 1.Above-mentioned furnace coiler is configured in the input side and the outlet side of milling train 2, is provided with coiling machine 4L, 4R in heating furnace 3L, 3R.
In the present embodiment, taking-up equipment in the middle of having, this centre devices for taking-up has 2 furnace coilers that are configured in outlet side, this furnace coiler is provided with coiling machine 19L, 19R in 2 heating furnace 18L, 18R, heater 5 and/or cooling device 6 are set betwixt, have disposed finishing mill 20 thereafter.
The rolling of Steger rolling equipment is such: the rolled stock 1 in that the final mill train of Steger rolling mills is rolled, while be rolled by guidings such as pinch roll 11 and local derviation rolls 12, batched by the coiling machine 19R of middle taking-up equipment.Batched the rolled stock 1 that is over by coiling machine 19R, with after heater 5 and/or cooling device 6 heating and/or the cooling, 19L batches by the opposing party's coiling machine as required.Finally rolling is such: extract out from coiling machine 19L, and rolling by the finishing mill 20 that is arranged on the rear, after 14 coolings of the cooling facility for laminar flow on the discharging roller-way, batched by downcoiler 15.
Like this, the heat treatment step of heating, cooling etc. can independently carry out with rolling process.Therefore, state on the implementation in the heat treatment step, can be rolled, can improve productivity with Steger rolling mills equipment.In addition, in this equipment, can simply heating and cooling be divided and in some mill traines, carry out.
This means in the operation of rolling and can implement the complicated heat treatment operation simply, in addition, can obtain the second best in quality product.For example, with devices for taking-up in the middle of above-mentioned, at initial mill train the rolled stock of the austenite structure more than the A3 point is dropped to the regional temperature of ferrite below the A3 point, at next mill train, with the rolled stock of ferrite tissue, be heated as the above austenite structure of A3 point etc.
Usually, make carbon steel pass through transient point, can make metal structure for example produce from the austenite to the ferrite or from the iron ferrite to austenitic crystallization again, utilize this point can make the crystal grain miniaturization of metal structure.That is, implement above-mentioned heat treatment step before final mill train, can make the prior miniaturization of crystal grain of mother metal, it is very favourable that this quality for final products improves.But necessary heat treatment step is according to rolling material and different.Therefore, can carry out optimal heat treatment according to rolled stock within the bounds of possibility with this equipment.
In addition, aspect equipment,, level(l)ing machine is set preferably between middle devices for taking-up and finishing mill or in middle devices for taking-up.Like this, the bending of the rectifiable front end that is batched by coiling machine can be easily to the logical plate of finishing mill.(embodiment 4)
Fig. 4 illustrates when the length of the outlet side rolled stock in the Steger rolling equipment arrives the centre devices for taking-up method of operating of middle devices for taking-up.Among Fig. 4, expression in advance material 1a by coiling machine 19L, the 19R of middle devices for taking-up both sides batch, in the stage that the tension force effect is arranged, the top roll of pinch roll 11 is risen to the state more than the thickness of slab of back row material 1b.Like this, can avoid material 1a and the mutual interference mutually of row material 1b afterwards in advance simply.And, even do one's utmost to shorten distance between Steger rolling equipment and finishing mill, before the processing of middle devices for taking-up finishes, needn't end the rolling of Steger rolling equipment, can improve productivity.(embodiment 5)
Fig. 5 is the embodiment that expression is configured in the middle devices for taking-up in Fig. 3 equipment Steger rolling equipment input side.A mill train in the final mill train front of Steger rolling equipment, the rolled stock 1 from coiling machine 3R extracts out is batched by coiling machine 19L by milling train 2, and this point is identical with milling method in Fig. 1 equipment.
In the present embodiment, at two milling trains 2, can rolling one side, one side high-speed wind-up.That is, be the operation of purpose with the heat treatment of solution treatment etc., can in the operation that batch the rolled stock 1 that is batched by coiling machine 19L again coiling machine 19R, implement.In addition, can implement heat treatment between coiling machine 19L and 19R simply with some mill traines, this point is identical with the explanation among Fig. 3.In addition, if adopt at milling method illustrated in fig. 4, then also can be with the side by side rolling back of Steger rolling mills row material 1b when middle devices for taking-up carries out necessary heating, cooling.At final mill train, the rolled stock 1 from coiling machine 19L rolls out is rolled into the file shape by promptly two milling trains 2 of the milling train of Steger rolling equipment and finishing mill 20, after 14 coolings of the cooling device on the discharging roller-way, is batched by downcoiler 15.
The maximum purpose of this configuration is to cut down finish rolling board number.That is, in Fig. 3 embodiment, middle devices for taking-up is arranged between Steger rolling equipment and the finishing mill, so, at final mill train, only rolling with being arranged on its later finishing mill.And in the configuration shown in Figure 5, even final mill train is rolling, the also available promptly two milling trains 2 of milling train that are arranged in the Steger rolling equipment are rolled.Therefore, that supposes finishing mill is provided with number when identical with quantity among Fig. 3, can add heavy reduction, otherwise if during identical drafts, that then can cut down finishing mill is provided with the platform number.This configuration has equipment and oversimplifies, reduces the effect that the space is set, lowers installation cost.
In the top explanation, between milling train and the furnace coiler before and after it, heating, cooling device are not set.But, as described in known example, between above-mentioned, also heating, cooling device can be set.That is, the heating of minimum capacity, cooling device do not hinder operability, can obtain various effects.
In addition, in the top explanation, the coiling machine of Steger rolling equipment is arranged on the furnace coiler in the heating furnace.But, be not to be arranged in the heating furnace.Especially when final thickness of slab is 3～5mm, as long as the heat of guarantor.But, the wide end of the plate of rolled stock (edge part) is preferably heated.This is because comparing edge part with plate central authorities cools off easily, if directly rolling, then may produce edge crack.Can prevent that to its heating this crack from producing.
In addition, in the top explanation, the coiling machine beyond the coiling machine that adopts in the Steger rolling equipment is that furnace coiler is arranged on the mill train line.But being not limited thereto, also can be the coiling machine, for example downcoiler etc. beyond the furnace coiler, and the position is set also can be below the mill train line.In addition, in the middle of having, in the equipment of devices for taking-up, also this device can be arranged on by the side of roll line.At this moment, other coiling machine is set on roll line, devices for taking-up in the middle of with conveyer the coiling machine after this batches being transported to, implemented required heat treatment step after, be transported to the device that rolls out on the roll line with conveyer, continue rolling then.In a word, comprise being rolled once above rolled stock at least, at least final rolling before, while batch or roll out the operation of heat-treating more than carrying out at least once.
From top explanation as can be known, when constituting the equipment of hot rolling that comprises the Steger rolling equipment as described above, can realize the rolling of the high-quality carbon steel plate do not accomplished before.
As mentioned above, in the large-scale hot strip rolling equipment before, freely change metal structure before rolling and be unusual difficulty, then can realize simply with present embodiment.In addition, Steger rolling mills before is specially to be applicable to special steel grades such as stainless steel, and also rolling applicable to high-quality carbon steel of present embodiment can be described as epoch-making technology.
According to the present invention, can improve the operability of Steger rolling equipment.

Claims (13)

1. equipment of hot rolling has the Steger rolling equipment, and in this Steger rolling equipment, input side and outlet side at milling train are provided with the furnace coiler that has coiling machine in stove; It is characterized in that, at least one side at the input side and the outlet side of above-mentioned Steger rolling equipment, be arranged on the furnace coiler that has coiling machine in the stove, between the furnace coiler and this Steger rolling equipment of above-mentioned Steger rolling equipment input side and at least one side's setting of outlet side, be provided with adjusting by the device of the rolled stock temperature of above-mentioned mill milling.
2. equipment of hot rolling, it is characterized in that, have the Steger rolling equipment, in this Steger rolling equipment, disposing the milling train that in stove, has the 1st furnace coiler of coiling machine, rolling rolled stock, the 2nd furnace coiler that in stove, has coiling machine successively; The upstream side of above-mentioned Steger rolling equipment and at least one side in downstream, the device of regulating this rolled stock temperature is set; Side opposite with the Steger rolling equipment at the device of regulating this rolled stock temperature is provided with the 3rd furnace coiler, and the 3rd furnace coiler has coiling machine in stove.
3. equipment of hot rolling, have the Steger rolling equipment, this Steger rolling equipment have rolling rolled stock milling train, be configured in this milling train input side and in stove, have the 1st coiling machine furnace coiler, be configured in this milling train outlet side and in stove, have the furnace coiler of the 2nd coiling machine; It is characterized in that, input side or outlet side at above-mentioned Steger rolling equipment, setting has the devices for taking-up of the 3rd and the 4th coiling machine, between the above-mentioned the 3rd and the 4th coiling machine, the heater at least in heater that heats this rolled stock and the cooling device that cools off this rolled stock is set.
4. equipment of hot rolling as claimed in claim 3, it is characterized in that, at the downstream of above-mentioned Steger rolling equipment configuration finishing mill, between above-mentioned Steger rolling equipment and above-mentioned finishing mill, dispose above-mentioned middle devices for taking-up, in this centre devices for taking-up or between this centre devices for taking-up and finishing mill and in this centre devices for taking-up side, be provided with the arbor press of the bending of correcting the rolling material.
5. as each described equipment of hot rolling in the claim 1 to 4, it is characterized in that the milling train of above-mentioned Steger rolling equipment is at least one the milling train that has 2 groups of roller groups in a casing.
6. as each described equipment of hot rolling in the claim 1 to 5, it is characterized in that, be provided with derusting device or hot-rolling oil feedway; Above-mentioned derusting device is configured at least one side of the input side and the outlet side of above-mentioned milling train, to this rolled stock inject high pressure fluid, removes the rust on this rolled stock surface; Above-mentioned hot-rolling oil feedway is to this rolled stock jet surface hot-rolling oil.
7. hot-rolling method is rolled with the equipment of hot rolling that has the Steger rolling equipment, and this Steger rolling equipment is provided with the furnace coiler that has coiling machine in stove at the input side and the outlet side of milling train; At least one side at the input side and the outlet side of above-mentioned Steger rolling equipment disposes the furnace coiler that has coiling machine in stove; Between the furnace coiler that is located at above-mentioned Steger rolling equipment input side and at least one side of outlet side and this Steger rolling equipment, be provided with the device of regulating the rolled stock temperature; Comprise with above-mentioned milling train rolling at least once rolling process, the heat treatment step of heat-treating with the device of regulating the rolled stock temperature behind this rolling process, behind this heat treatment step rolling at least rolling process once.
8. hot-rolling method as claimed in claim 7 is characterized in that, above-mentioned heat treatment step is implemented once in the previous passage of the final at least passage of milling train at least, and, behind rolling process thereafter, cool off this rolled stock.
9. as claim 7 or 8 described hot-rolling methods, it is characterized in that above-mentioned heat treatment step comprises the operation that once keeps operation or comprise a cold rolling material at least at least; Above-mentioned maintenance operation is the above above austenite region of A3 point of solid solubility temperature that is heated to the rolled stock carbide precipitate, batches, and keeps at the state that has batched the scheduled time.
10. as each described hot-rolling method in the claim 7～9, it is characterized in that, at least once rolling in the rolling process behind above-mentioned heat treatment step, adopted the rolling of hot-rolling oil.
11. hot-rolling method as claimed in claim 7, it is characterized in that, in the process of batching on the input side that is configured in above-mentioned Steger rolling equipment and at least one side's of outlet side the furnace coiler, this milling train is not rolled or is rolling with extremely gently compressing into row, perhaps makes the roller cooling fluid of roll of this milling train of cooling not be injected on this roll or is controlled to be seldom amount.
12. as claim 7 or 8 described hot-rolling methods, it is characterized in that, above-mentioned heat treatment step comprises the maintenance operation, this maintenance operation is the above above austenite region of A3 point of solid solubility temperature that is heated to the rolled stock carbide precipitate, batch, and keep at the state that has batched the scheduled time; Rolling out in the operation after this operation is being about to austenite non-recrystallization zone or ferrite zone or ferrite and austenitic mixing 2 alpha regions that rolling rolled stock temperature is controlled at rolled stock.
13., it is characterized in that the accumulation reduction ratio of the final rolling pass of milling train is more than 50%, to be preferably more than 60% as each described hot-rolling method in the claim 7～12.
CN00124257A 1999-08-24 2000-08-22 Hot-rolling equipment and rolling method thereof Pending CN1285245A (en)

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JP23650699A JP3695242B2 (en) 1999-08-24 1999-08-24 Hot rolling equipment and rolling method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102834194A (en) * 2009-12-30 2012-12-19 达涅利机械设备股份公司 Winding/unwinding device and method for winding/unwinding a metal product in a rolling line
CN107405658A (en) * 2015-03-09 2017-11-28 东芝三菱电机产业系统株式会社 Rolling equipment
CN112705569A (en) * 2020-12-09 2021-04-27 一重集团大连工程技术有限公司 Steckel mill production line with ultra-short distance arrangement and rolling process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102834194A (en) * 2009-12-30 2012-12-19 达涅利机械设备股份公司 Winding/unwinding device and method for winding/unwinding a metal product in a rolling line
CN102834194B (en) * 2009-12-30 2015-05-27 达涅利机械设备股份公司 Winding/unwinding device and method for winding/unwinding a metal product in a rolling line
CN107405658A (en) * 2015-03-09 2017-11-28 东芝三菱电机产业系统株式会社 Rolling equipment
CN112705569A (en) * 2020-12-09 2021-04-27 一重集团大连工程技术有限公司 Steckel mill production line with ultra-short distance arrangement and rolling process
CN112705569B (en) * 2020-12-09 2022-09-23 一重集团大连工程技术有限公司 Steckel mill production line with ultra-short distance arrangement and rolling process

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