CN1820875A - Method for custom-making steel strip - Google Patents
Method for custom-making steel strip Download PDFInfo
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- CN1820875A CN1820875A CNA2006100067933A CN200610006793A CN1820875A CN 1820875 A CN1820875 A CN 1820875A CN A2006100067933 A CNA2006100067933 A CN A2006100067933A CN 200610006793 A CN200610006793 A CN 200610006793A CN 1820875 A CN1820875 A CN 1820875A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
Abstract
A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatically map the product specifications to process parameters/set points for controlling the continuous steel strip casting process in a manner to produce the customer ordered product, and in one embodiment produces a process change report detailing such process parameters/set points for operator use in physically implementing such process parameters/set points in the strip casting process. Alternatively, the computer may provide the process parameters/set points directly to the strip casting process for automatic control thereof in producing the customer ordered steel product. The process of the present invention is capable of substantially reducing the time between a customer request for a steel product and delivery thereof over that of conventional steel manufacturing processes.
Description
The application is that denomination of invention is dividing an application of " method that steel band is provided by order ", application number are 01815835.8, the applying date is September 28 calendar year 2001 application for a patent for invention.
Horizontal reference with related application
The application requires the priority and the rights and interests of the U.S. Provisional Application 60/236390 of submission on September 29th, 2000.
Technical field
The application generally relates to the system and method that steel band is provided by order, and especially relate to such system and method, it is used for the steel band demand that client is specific and is transformed into the process operation parameter that is used to control the continuous strip casting process, and handles this parameter and produce the specific steel band product of client.
Background technology
Being used to finish the user is complicated and consuming time to the technology of traditional steel and iron industry of order with the specific steel of specific mechanical and size, and generally need 10 or more time-of-weeks finish.For example, with reference to Fig. 1, show the flow chart of flow process of traditional handicraft 10 of the steel band product of explanation production customization, wherein, term " band " is interpreted as referring to the product of 5mm thickness or littler thickness as used herein.
Technology 10 is from step 12, and in this step, steelmaker receives customer order, and this order is generally proposing aspect the machinery of steel band product and size requirements and required quality.After this, in step 14, steelmaker is determined specific iron and steel chemical composition requirement by customer order, is used for realizing the broad sense characteristic of product.(and under many circumstances, be traceable to ingot casting/hot rolling technology, be the primary decisive factor of characteristic in this chemical composition) that chemical composition require to be to select from a large amount of prescription list that available iron and steel optics is formed.After this, in step 16, steelmaker determine with the corresponding casting parameter of running parameter also/or be used for the set-point (set point) of steel casting process, this set-point is used for producing steel slab from the molten steel that requires to form according to the iron and steel chemical composition.In step 18, steelmaker is determined downstream sheet material processing demands, at first the size requirements that realizes client (as thickness etc.) is kept a close eye on, and then by additional downstream step processing, this may be to realize that the final products characteristic is needed.This downstream sheet material processing demands for example can comprise following in each or its combination, (a) with the pre-thermal parameter of the corresponding sheet material of running parameter of hot rolling smelting furnace and/or be used for the set-point of the rolling treatment facility of tropocal wood; (b) with the corresponding hot rolling parameter of rolling running parameter and/or be used for the set-point of the rolling treatment facility of tropocal wood; (c) with pickling and the corresponding cold rolling parameter of cold rolling running parameter and/or be used for the set-point of cold-rolling treatment equipment; And (d) and the corresponding heat treatment parameter of heat treatment running parameter and/or be used for the set-point of Equipment for Heating Processing.
From step 18, technology 10 proceeds to step 20, and in step 20, steelmaker requires to produce a collection of molten steel according to the chemical composition that is used for the particular steel iron product, and according to the casting parameter that step 16 is set up steel products is cast the board material.Usually, client's order (can for 5 tons so few) is in batches, up to have enough orders with till satisfying once steel-making heating-according to the design of concrete steel mill, be generally 100 to 300 tons.This has further increased the weight of the delay to the time of satisfying the specific consumers order, thus equally with extending to total time above 10 weeks of producing.Under any circumstance, technology 10 proceeds to step 22 from step 20, and in step 22, according to the sheet material preheating and the hot rolling parameter of establishing in step 18, plate is preheated, and in the place's hot rolling of tropocal wood rolling equipment, to produce the coil of strip material of predetermined thickness.After this, in step 24, according to the pickling and the cold rolling parameter of establishing in step 18, coiled strip is reduced to the specific thickness of client by pickling and cold rolling at the cold-rolling mill place with the thickness with coiled strip.Finally, in step 26,,, with coiled strip annealing, thereby make it satisfy the demand of customer order at Equipment for Heating Processing place heat treatment coiled strip according to the heat treatment parameter of establishing in step 18.
The steel band production of the type of traditional firm description need be produced a lot of different steel grades (generally above 50), they at first are cast as sheet material, then in the tropocal wood milling train by complicated hot rolling routine processes, this can produce thickness is the so low and yield strength of 1.5mm at 300 products in the 450MPa scope.If the material that customer need is thinner or need characteristic outside this scope so just need relate to the subsequent treatment of pickling lines, cold reduction milling train and annealing smelting furnace.
The major defect relevant with traditional steel band production technology of just having described is for producing the excessive cycle of the steel product that satisfies customer order; General 10 or more all.Therefore, need a kind of improved steel band production technology, this technology is more positive to client's demand response by the required time of the specific steel band product of very big shortening production client.
Summary of the invention
The above-mentioned shortcoming of prior art is solved by the present invention.According to one aspect of the invention, control steel tape casting process comprises with the method that satisfies the specific steel product of client: accept the order of steel product, it comprises client's particular demands that described product is relevant; Described client's particular demands is mapped to a plurality of technological parameters that are used to control the steel tape casting process, to produce described steel product; And the operator who the described a plurality of technological parameters on the technology change report is shown to described casting steel strip process.
According to a further aspect of the invention, control steel tape casting process comprises with the method that satisfies the specific steel product of client: accept the order of steel product, it comprises client's particular demands that described product is relevant; Described client's particular demands is mapped to a plurality of technological parameters that are used to control the steel tape casting process, to produce described steel product; And control described steel tape casting process based on described technological parameter, to produce described steel product.
According to a further aspect of the present invention, control steel tape casting process comprises with the method that satisfies the specific steel product of client: based on the predetermined technological parameter control steel tape casting process of a cover, to produce first steel product, acceptance is to the order of second steel product, and it comprises client's particular demands that described second steel product is relevant; The demand that described client is specific is mapped on one group of new technological parameter, is used for controlling described steel tape casting process, to produce described second steel product; And described group of new technology parameter replaced described group of predetermined process parameters and do not interrupt described steel tape casting process, so that described steel tape casting process switches to and produces described second steel product from producing described first steel product immediately.
According to another aspect of the invention, provide the method for the specific steel band of client to comprise the order process to the steel band of user's particular demands is become to be used for the program of producing the steel band of being ordered with a production run of the continuous band casting machine of independent iron and steel chemical composition cast steel strip; Cool off steel band by austenite to the ferritic transformation temperature range; And the Selective Control technological parameter, the product steel band that has client's particular demands with production.
Preferably, this method also comprises: by austenite before ferritic transformation temperature range cooling strip material, the band of online hot rolling casting.
According in each of said method of the present invention, the specific demand of client can comprise specific steel grade and/or specific thickness of strip, and the technological parameter of producing client's particular steel section product comprise following in any or its combination, i.e. percentage, anneal cycles type and the annealing temperature of the casting speed of continuous band casting process, the as cast condition steel thickness of steel product, the percentage of steel product hot compression, the cooling rate of steel product, the coiling temperature of steel product, the cold reduction of described steel product.
An object of the present invention is to provide a kind of steel band that provides to satisfy the method for customer order.
Another object of the present invention is to make client to the turnaround time minimum between the actual production of the acceptance of steel band product order and steel band product.
These and other purposes of the present invention will be able to clearer from following description of preferred embodiments.
Description of drawings
Fig. 1 is the flow chart of the traditional steel band production technology of explanation;
Fig. 2 is the schematic diagram according to a preferred embodiment of steel tape Casting Equipment of the present invention;
Fig. 3 is the schematic diagram that some details of the two roller strap material casting machines in Fig. 1 equipment are shown;
Fig. 4 is the calcspar of general-purpose computing system of technological parameter that the specific steel band demand of client can be converted into the steel tape Casting Equipment of control chart 2 and 3;
Fig. 5 is the flow chart of a preferred embodiment of the explanation technological process that utilizes the all-purpose computer control chart 2 of Fig. 4 and 3 steel tape Casting Equipment.
The specific embodiment
For the ease of understanding the purpose of principle of the present invention, the preferred embodiment shown in, and specific language with reference to the accompanying drawings will be used for describing this embodiment.However, it will be appreciated that and be in no way intended to limit the scope of the invention to this, change on illustrated embodiment and further revising, and the further application of principle of the present invention shown here all is considered to normal for a person skilled in the art and takes place.
The present invention is based in continuous band casting machine and produce steel band.The applicant has carried out extensive studies and development work in the field of the continuous band casting machine cast steel strip of twin-roll caster form.Generally say, continuous casting steel strip comprises molten steel is introduced between a pair of roller of horizontal casting in relative rotation in twin-roll caster, this is inner water-cooled to casting roll, so that metal skin solidifies on the roller surface of moving, and the roll gap place between roller is sent to together, thereby produce the solidified strip that transmits from the roll gap between each roller downwards, term " roll gap " is used in reference to each roller near total zone of arriving together.Motlten metal can be poured into the smaller container from ladle, this motlten metal is from flowing through the metal delivery that is positioned on the roll gap here, so that it is directed in the roll gap between each roller, thereby form the casting pool of motlten metal, this casting pool is bearing on the casting surface of roller, extends on roll gap and along the length of roller just.This casting pool generally is enclosed between side plate or the fire dam (dam), and the end face of the latter and roller keeps being slidably engaged, thereby stops the two ends outflow of casting pool, although proposed other devices such as the electromagnetism barrier.Cast steel strip is for example described in United States Patent (USP) 5184668,5277243 and 5934359 in this twin-roll caster, and all these are incorporated herein by reference especially.
The applicant determined by continuous strop casting and after this selectively changing downstream ribbon processing parameter might produce the steel band of given composition, this steel band has various microstructure, and therefore has various mechanical properties.For example, the applicant from the work of carrying out at the carbon steel that comprises the ordinary carbon steel of eliminating silicon/magnesium, determined 0.1 ℃/s select in greater than the scope of 100 ℃/s by austenite to the cooldown rate of ferritic transformation temperature range can produce yield strength at 200MPa to greater than the steel band in the 550MPa scope.The production run that of the flexibility of the continuous band casting of having been recognized by the applicant thus is exemplified as the continuous band casting machine of the given composition of casting may be controlled to make cast strip can optionally bear different cooldown rates by austenite to the ferritic transformation temperature range, the result who brings is that tape can form any choice structure that has in the diverse microcosmic range of structures, thereby has different mechanical properties.
In a word, the applicant has been found that by selectively changing downstream ribbon processing parameter in the steel tape casting process, can realize sizable flexibility aspect the manipulation continuous band casting machine, thereby satisfy (that is the client) demand of production.This means by client to the steel band of intended size specification and different mechanical property scopes under order can in single production run, produce by single iron and steel chemical composition.In addition, this means that the adjustment to production run can realize when production run is carried out.This is recognized to have significant advantage aspect the continuous band casting of satisfying the urgent order demand of client by the applicant.
The following description of the preferred embodiments of the present invention provides aspect the twin-roll caster continuous casting steel strip utilizing.The present invention is not limited to the use twin-roll caster, but can be extended to the continuous band casting machine of other types.
With reference to Fig. 2, steel tape Casting Equipment/technology 50 is shown one of production line part in succession, thus can steel band produced according to the invention.Fig. 2 and 3 illustrates and always is denoted as 54 twin-roll caster, and this casting machine is produced cast steel strip 56, and steel band passes guide table 58 and arrives pinch roll support 60 in migration path 52, and this pinch roll support 60 comprises pinch roll 60A.After leaving pinch roll support 60, steel band runs in the hot-rolling mill 62 immediately, and hot-rolling mill comprises a pair of reduction roll 62A and bearing roller 62B, and steel band is reduced its thickness by hot rolling betwixt.Rolling steel band runs on the runout table 64, and it can be forced cooling by water jet 66 thereon, and arrives up-coiler 68 thus by the pinch roll support 70 that comprises a pair of pinch roll 70A and 70B.
Referring now to Fig. 3, twin-roll caster 54 comprises mainframe 72, and its supporting has the pair of parallel casting roller 74A of casting surface 74A and 74B.In casting process, motlten metal is provided on the tundish 80 from the ladle (not shown), arrives distributing devices 84 by refractory material guard shield 82, and enters in the roll gap 88 between the casting roll 74 by metal delivery 86 thus.The motlten metal that so is transported in the roll gap 88 forms metal pool 92 on roll gap 88, this metal pool 92 is enclosed in the end of roller by an offside fire dam or side seal closing plate 90, side seal closing plate 90 is applied on the end of roller by a pair of propeller (not shown), and this propeller comprises the hydraulic cylinder unit that is connected on the side plate carriage.The upper surface of metal pool 92 (being commonly referred to as meniscus) can be elevated on the lower end of delivery nozzles 86, thereby the lower end of delivery nozzles 86 is immersed in this metal pool 92.
Casting roll 74 is a water-cooled, so that metal skin solidifies on the roller surface of moving, and 88 places of the roll gap between roller are brought to together, thereby produce the solidified strip 56 of carrying from the roll gap between the roller 74 88 downwards.Twin-roll caster 54 can for United States Patent (USP) 5184668 and 5277243 or United States Patent (USP) 5488988 in be shown specifically and describe the sort of, these publications are incorporated herein by reference separately especially.
According to the present invention, client enters general-purpose computing system to the order of steel band, computer system 150 as Fig. 4, and handle in the mode that below will describe more comprehensively, to be identified for controlling the technological parameter and/or the technology set-point of steel tape casting process, this casting process such as top with reference to Fig. 2 and the 3 steel tape casting process of describing 50 satisfies client's order thus.With reference to Fig. 4, general-purpose computing system 150 comprises all-purpose computer 152, this computer 152 can be traditional desktop personal computer (PC), above-knee or notebook computer or other known all-purpose computers, and this computer is configured to work in the mode of describing subsequently.Computer system 150 comprises the traditional keyboard 154 that is electrically connected on the computer 152, is used for to the input information relevant with customer order wherein, and can comprises any output equipment or its combination.For example, computer 152 can be electrically connected on the printer 156, wherein computer 152 can be configured to print one group of technological parameter with the form of technology change report or similar report, and wherein the technology change report is described technological parameter and/or the set-point that is used for controlling in the mode of producing customized steel band product the steel tape casting process of the steel tape casting process 50 shown in Fig. 2 and 3.In one embodiment of the invention, the steel tape casting process is browsed the technology change report as the operator of technology 50, and the steel tape casting process is carried out corresponding physical change, produces customized steel band product thus.
Computer 152 can be alternatively or additionally is electrically connected on the conventional monitors 158, wherein, computer 152 can be configured to show one group of technological parameter in the mode of technology change report or similar report, wherein, the technology change report is described technological parameter and/or the set-point that is used for controlling in the mode of producing customized steel band product the steel tape casting process of the steel tape casting process 50 shown in Fig. 2 and 3.The steel tape casting process, as the operator of technology 50 outside the report of printing or substitute the report of printing, browse the technology change report that shows on the monitor, and the steel tape casting process is carried out corresponding physical change, produce customized steel band product thus.
Computer 152 also is electrically connected on traditional storage medium unit 160, and wherein, computer 152 is configured to known manner to memory cell 160 stored informations and retrieving information from it.In one embodiment of the invention, computer 152 is configured to download to storage medium 162 via memory cell 160 one group of technological parameter of one group of technology change report or similar report form, wherein, the technology change report is described technological parameter and/or the set-point that is used for controlling in the mode of producing customized steel band product the steel tape casting process of the steel tape casting process 50 shown in Fig. 2 and 3.The steel tape casting process can be with the content of conventional art access storage media as the operator of technology 50, browsing the technology change report, and the steel tape casting process is carried out corresponding physical change, produces customized steel band product thus.Storage medium unit 160 and storage medium 162 can be used as the combination of any known storage medium unit and storage medium and realize.Its example comprises disk read/write cell 160 and disk 162, CD ROM read/write cell 160 and CD ROM dish 162 etc., but is not limited to this.
In another embodiment, the steel tape casting process, steel tape casting process 50 as shown in Fig. 2 and 3 is computer-controlled technology, and in this case, computer system 150 can be configured to provide the technology change report by the suitable communication link shown in Fig. 4 platform 164 direct (electronically) to technology 50.In addition, in such an embodiment, computer 152 can be configured to the technology change report is downloaded to storage medium 162, wherein, the storage medium 162 that the operator will comprise the technology change report is loaded into and is built on the storage medium unit 160 similar storage medium unit (not shown) in the technology 50, shown in dotted line among Fig. 4 166.Under any situation, the corresponding technology change report of steel tape casting process (as technology 50) and carry out the change of corresponding technique change and/or equipment set-point automatically.Yet, be understood that, with how the steel tape casting process is made technology and/or the set-point change is irrelevant, the corresponding this change of Strip casting treatment facility is understood to switch to according to new technological parameter/technology set-point information from the steel band product of producing present production and is produced the steel band product.
With reference to Fig. 5, show flow chart, this flowchart text is used to control the steel tape casting process, as a preferred embodiment of the process 200 of reference Fig. 2 and the 3 illustrated and technologies 50 described.Process 200 starts from accepting the initial step 202 of client to the order of the steel band product of specific mechanical characteristic or product specification.In one embodiment, Zong product specification comprises the desirable levels of steel product, desirable thickness of strip and band amount, although the present invention considers the extra or other information relevant with customized product.After this, in step 204, product specification is input to computer 152 with the known mechanism that is used for this.For example, the operator can key in information in the computer 152 via keyboard 154, perhaps, if information be by client at storage medium, as providing on the disk, then the operator can upload to information in the computer 152 by storage medium unit 160 simply.In addition, unspecified other known technologies were input to product specification in the computer 152 during the present invention considered with reference to the accompanying drawings, wherein this other known technologies can comprise that the telephone modem that product specification is passed through to connect transmits between computer 152 and client's computer, product specification is passed through the Internet transmission, Deng, but the present invention is not limited to this.
Under any circumstance, process 200 proceeds to step 206 from step 204, in this step, computer 152 work are calculated technological parameter and/or the technology set-point that is used to control steel tape casting process (as technology 50) based on the product specification that is input in step 204 in the computer 152 in the mode of producing customized steel product, according to the present invention, computer 152 programming has one or more sets and the relevant rule of product specification in step 204 input computer 152, so that set the technological parameter/set-point that is used to control the steel tape casting process according to the mode of the customized steel product of production.These one or more sets rules can be used as the combination of any or they in one or more tables, one or more curve, the one or more equations etc. and realize.Provide among example Table I, II and the III below of the illustrative rule of one cover.
Table 1 is shown specifically the product specification relevant with customized steel product be mapped to and is used for this illustrate and the set of rule of the technological parameter/set-point of the tropical product of the steel tape casting process of describing 50.Because they are relevant with Table I, the steel grade of the ASTM specification in the torrid zone is relevant with percentage elongation (%Elong) with following yield strength (YS):
| The ASTM grade | YS(ksi) | ％Elong |
| Grade 33 class 4s 0 | 33 to 43 40 to 45 50 to 60 65 to 75 80 to 90 | 30 to 35 25 to 30 20 to 25 15 to 20 10 to 15 |
And, residual level index L, M and H by low (L)＜0.35% of relation, in (M)=0.8% and high (H)=1.2% limits.
Table I
| Torrid zone product specification customer order | Casting machine technology set-point | ||||||
| Thickness (mm) | The ASTM grade | Residual degree (Cu+Sn+Mo+Ni+Cr) | Casting speed (m/min) | As cast condition thickness | The % hot compression | The ROT cooling curve | |
| Cooldown rate * (℃/s) | The coiling temperature (℃) | ||||||
| 0.04” (1.0mm) | Grade 33 | Can not be with current chemical composition production | |||||
| 0.04” (1.0mm) | Class 40 | | 80 | 1.6 | 38 | 700 | |
| 0.04” (1.0mm) | | L M | 80 80 | 1.6 1.6 | 38 38 | 150 | 700 |
| 0.04” (1.0mm) | Class 65 | L M H | 80 80 80 | 1.6 1.6 1.6 | 38 38 38 | 200 150 | 650 |
| 0.04” (1.0mm) | | | 80 80 | 1.6 1.6 | 38 38 | 200 250 | |
| 0.047” (1.2mm) | Grade 33 | Can not be with current chemical composition production | |||||
| 0.047” (1.2mm) | Class 40 | | 80 | 1.6 | 25.0 | 700 | |
| 0.047” (1.2mm) | | L M L | 80 80 45 | 1.6 1.6 1.9 | 25.0 25.0 37 | 150 | 700 650 |
| 0.047” (1.2mm) | Class 65 | L M H | 80 80 80 | 1.6 1.6 1.6 | 25.0 25.0 25.0 | 200 150 | 650 |
| 0.047” (1.2mm) | | | 80 80 | 1.6 1.6 | 25.0 25.0 | 200 250 | |
| 0.055” (1.4mm) | Grade 33 | Can not be with current chemical composition production | |||||
| 0.055” (1.4mm) | Class 40 | | 80 | 1.6 | 12.5 | 700 | |
| 0.055” (1.4mm) | | L M L | 80 80 45 | 1.6 1.6 1.9 | 12.5 12.5 26.0 | 60 | 650 650 |
| 0.055” (1.4mm) | Class 65 | | 80 | 1.6 | 12.5 | 100 | |
| 0.055” (1.4mm) | | | 80 80 | 1.6 1.6 | 12.5 12.5 | 150 | 650 |
| 0.063” (1.6mm) | Grade 33 | Can not be with current chemical composition production | |||||
| 0.063” (1.6mm) | Class 40 | | 80 | 1.6 | 0.0 | 700 | |
| 0.063” (1.6mm) | | L M | 80 80 | 1.6 1.6 | 0.0 0.0 | 60 | 650 |
| 0.063” (1.6mm) | Class 65 | | 80 | 1.6 | 0.0 | 100 | |
| 0.063” (1.6mm) | | | 80 80 | 1.6 1.6 | 0.0 0.0 | 150 | 650 |
| 0.075” (1.9mm) | Grade 33 | Can not be with current chemical composition production | |||||
| 0.075” (1.9mm) | Class 40 | L | 45 | 1.9 | 0.0 | 700 | |
| 0.075” (1.9mm) | Class 50 | M | 45 | 1.9 | 0.0 | 650 | |
| 0.075” (1.9mm) | Class 65 | H | 45 | 1.9 | 0.0 | 650 | |
| 0.075” (1.9mm) | | Owing to before ROT, can deform, therefore be not easy to produce | |||||
*Cooldown rate in 800-500 ℃ of temperature range
The common set of rule Table II below that is used for the tropical product of generation table 1 value is summed up, and wherein, term " chemical composition " refers to the residual degree in strip product, wherein, low, in and high level summarize as above.
Table II
| Chemical composition | ％HR | Cooldown rate | Yield strength MPa |
| Low | ＜15 | 150 | 550 |
| Low | 25-40 | 250 | 550 |
| In | 25-40 | 200 | 550 |
| High | 0-15 | 30 * | 550 |
| Low | ＜15 | 100 | 475 |
| Low | 25-40 | 200 | 475 |
| In | 25-40 | 150 | 475 |
| High | 0-50 | 30 * | 475 |
| Low | ＜15 | 60 | 400 |
| Low | 25-40 | 150 | 400 |
| In | 25-40 | 30 * | 400 |
| Low | 0-50 | 30 * | 350 |
*Realize the standard cooldown rate of 650-700 ℃ coiling temperature.
From the data that actual motion is collected, determined that 1.2% of residue causes yield strength to improve about 120MPa, and therefore supposed that the increase of residue 0.1% causes the corresponding increase of yield strength 10MPa.
From Table I as can be seen, can understand in the cooldown rate of percentage, steel product of the as cast condition steel thickness producing the specific required technological parameter of hot strip steel section product of client and can comprise casting speed, the steel product of continuous band casting process, steel product hot compression and the steel product coiling temperature any and combination thereof now significantly.
Table III is shown specifically the product specification relevant with customized steel product be mapped to and is used for this illustrate and the set of rule of the technological parameter/set-point of the cold-rolled products of the steel tape casting process of describing 50.Because they are relevant with Table III, the steel grade of cold rolling ASTM specification is relevant with percentage elongation (%Elong) with following yield strength (YS):
| The ASTM grade | YS(ksi) | ％Elong |
| Grade 33 class 4s 0 | 33 to 43 40 to 50 | 30 to 35 30 to 35 |
| | 50 to 60 65 to 75 80 to 90 | 25 to 30 10 to 15 2min |
Table III
| The cold rolling thickness of cold-rolled products specification customer order (mm) | Torrid zone specification | Cold rolling/annealing parameter | ||||
| Cold rolling ASTM grade | Torrid zone thickness (mm) | Torrid zone ASTM grade | The % cold compression | Anneal cycles | Annealing temperature (°F) | |
| 0.008” (0.2mm) 0.008” (0.2mm) 0.008” (0.2mm) 0.008” (0.2mm) 0.008” (0.2mm) 0.016” (0.4mm) 0.016” (0.4mm) 0.016” (0.4mm) 0.016” (0.4mm) 0.016” (0.4mm) 0.024” (0.6mm) 0.024” (0.6mm) 0.024” (0.6mm) 0.024” (0.6mm) 0.024” (0.6mm) 0.032” (0.8mm) 0.032” (0.8mm) 0.032” (0.8mm) 0.032” (0.8mm) 0.032” (0.8mm) 0.040” (1.0mm) | Grade 33 class 4s 0 | 1.0-1.6 1.0-1.6 1.4-1.6 1.0-1.6 ** 1.0-1.6 1.0-1.6 1.4-1.6 1.0-1.6 ** 1.4-1.6 1.4-1.6 1.6-1.9 ** 1-1.6 1.4-1.6 1.6-1.9 ** 1.0 1.2-1.6 ** 1.9 | Class 40 class 40 | 80-88 80-88 86-88 80-88 60-75 60-75 70-75 60-75 57-63 57-63 57-68 40-63 43-50 50-58 20 33-50 47 | Batch annealing (BA) in batches/continuous annealing (CA) CA N/A BA BA/CA CA N/A BA CA CA N/A BA BA N/A N/A BA | Laboratory data-see footnote 1250-1350 1250-1350 N/A 1250-1350 1250-1350 N/A 1250-1350 1250-1350 N/A N/A N/A |
| 0.040” (1.0mm) 0.040” (1.0mm) 0.040” (1.0mm) 0.040” (1.0mm) | Class 40 |
1.9 1.3 1.6-1.9 *** | Class 40 class 40 class 40 | 47 23 38-48 | BA N/A N/A | N/A N/A |
*The laboratory data of batch annealing-slowly be heated to 1275 (needing about 33 hours) slowly is cooled to 750 °F (needing about 8 hours) from 1275 °F subsequently.Material yield intensity very low (23ksi) after annealing is optimized the possibility that grade 33 batch annealings are optimized so exist.
*Because less cold compression will better be extended, therefore the torrid zone of thin specification is preferred.
* *In order to obtain to have the higher yield strength of good draftability after annealing, the torrid zone of thin specification is preferred.
The one group of general rule that is used to produce the cold rolling material of Table III value is:
(i) need about 35-40%CR to obtain grade 80;
(ii), need at least 50% cold compression for continuous annealing; And
(iii), need at least 40% cold compression for batch annealing.
From Table III as can be seen, it will be appreciated that now the technological parameter that produces the specific hot-strip product of client can comprise in any and extra cold compression percentage, annealing type (for example in batches/continuously) and the annealing temperature of the tropical technology number that is used for producing tropical product any or its combination.
Referring again to Fig. 5, process 200 proceeds to step 208 from step 206, in one embodiment of the invention, in these step computer 152 work on the technology change report, technological parameter is shown to continuous band casting operator.Be appreciated that when computer 152 be not generally just to comprise step 208 when so going up described such automatic control steel tape casting process 50 work, otherwise will from process 200, omit.If comprise this step, computer 152 can be configured to show the technology change report via one or more output devices, as top described with reference to Fig. 4.In this embodiment, dashed rectangle 210 is summarized the step of the performed process 200 of computer 152.In addition, as described above, it is considered herein that in each embodiment computer 152 can be worked and be received customer order in the electronics mode, thereby dashed rectangle 210 can expand to and comprises step 202 in such an embodiment.
After the step 208, process 200 proceeds to step 212, in this step, the function of the technological parameter that calculates as step 206 control as with reference to the continuous band casting process of Fig. 2 and 3 explanations and the continuous band casting process 50 described produces the specific steel product of client thus.In the embodiment of the process that comprises step 208, step 212 generally be can't help computer 152 and is carried out, and the operator who replaces by the steel tape casting process carries out.In such an embodiment, the operator comes execution in step 212 by the technological parameter/set-point that proposes in the physics realization technology change report.Be configured to directly at computer 152 that (electronically) provides among the embodiment of technological parameter/set-point to the steel tape casting process, can omit step 208, and step 206 can directly advance to step 212.In such an embodiment, technological parameter/set-point that computer 152 can be configured to automatically step 206 place be calculated is implemented in the steel tape casting process, and under these situations, dashed rectangle 210 extends to and comprises step 212.
According to the present invention, computer system 150 work are with in the production scheduling that user's certain products specification is mapped to the steel of selecting composition.Generally, can continue some days at least for the production scheduling of given steel chemical composition, in the meantime, steel band is produced continuously by twin-roll caster 54.According to quantity of order and the amount that is customized, the whole production operation can have the steel band of one group of particular mechanical properties with production or be used for being associated along the steel band of the different selected mechanical property of the length generation of steel band.
Production scheduling is considered such as casting speed, hot-rolled temperature scope, hot compression amount with by the parameter of austenite to the cooldown rate of ferritic transformation temperature range (being generally 900 to 550 ℃), in cast strip, to produce final microstructure, this cast strip provides the band with required mechanical property, and consequential material processed and band cooldown rate change generation explicitly.
By at 0.1 ℃/s with above regulating cooling velocity in the scope of 100 ℃/s, can produce cast strip with following microstructure, this microstructure comprises:
(i) account for the polycrystalline ferrite of main body;
(ii) polycrystalline ferrite and low-temperature transformation product are as the mixture of acicular ferrite, Wiedemann Si Tedun (Widmanstatten) ferrite and bainite; And
(iii) account for the low-temperature transformation product of main body.
Under the carbon steel situation, this microstructure scope can produce 200MPa to the yield strength that surpasses 700MPa.After setting up production scheduling, can handle twin-roll caster 54 and produce cast strip, and this band can offer client on demand according to production scheduling.
An advantageous characteristic feature of the inventive method is to regulate production scheduling during production run, so that adapt to the condition of production based on the emergency of the band order of required mechanical property.Thereby in the methods of the invention, independent steel chemical composition is used for producing the wide range of mechanical characteristic, thereby client's order no longer needs to postpone before the heating/in batches arranging; The Strip casting that is associated with rolling temperature, hot compression degree and final products cooldown rate can generally be shorter than in 70 meters the production line at one and realize client's dimensions and required mechanical property simultaneously; Can come the real time altering various characteristics by the suitable set-point of in central control computer, revising the critical process controlling unit, thereby and can be short to 8 hours from accepting customer order to the time of produce assigning, traditional steel production method of 14 to 30 days of this and needs is opposite; And very short order can be realized the notion of virtual varehouse by the applying electronic commercial affairs to the time of paying.
Though be illustrated and describe in superincumbent accompanying drawing of the present invention and the description; this explanation and description should be considered to exemplary; rather than it is restrictive; be interpreted as just illustrating and described the preferred embodiments of the present invention, and all changes and the improvement that fall in the marrow of the present invention are considered to shielded.
Claims (17)
1. control the steel tape casting process to produce the method for the specific steel product of client for one kind, this method comprises:
Accept the order of steel product, this order comprises the particular demands of client to described product;
Described client's particular demands is mapped to one group is used to control the steel tape casting process to produce the technological parameter of described steel product; And
Control the steel tape casting process to produce described steel product based on described technological parameter.
2. the method for claim 1, wherein described client's particular demands comprises the thickness of described steel product.
3. method as claimed in claim 2, wherein, described client's particular demands comprises the grade of described steel product.
4. the method for claim 1, wherein described group technological parameter comprises the casting speed of described steel tape casting process.
5. method as claimed in claim 4, wherein, described group of technological parameter comprises the as cast condition thickness of described steel product.
6. method as claimed in claim 5, wherein, described group of technological parameter comprises the hot compression percentage of described steel product.
7. method as claimed in claim 6, wherein, described group of technological parameter comprises the cooldown rate of described steel product.
8. method as claimed in claim 7, wherein, described group of technological parameter comprises the hot-rolled temperature of described steel product.
9. control the steel tape casting process to produce the method for the specific steel product of client for one kind, this method comprises:
Accept the order of steel product, this order comprises the particular demands of client to described product;
Described client's particular demands is mapped to one group is used to control the steel tape casting process to produce the technological parameter of described steel product.
10. method as claimed in claim 9 wherein, also comprises: control the steel tape casting process to produce described steel product based on the technological parameter that is presented in the process reform report.
11. method as claimed in claim 9, wherein, described client's particular demands comprises the thickness of described steel product.
12. method as claimed in claim 9, wherein, described client's particular demands comprises the grade of described steel product.
13. method as claimed in claim 9, wherein, described group of technological parameter comprises the casting speed of described steel tape casting process.
14. method as claimed in claim 9, wherein, described group of technological parameter comprises the as cast condition thickness of described steel product.
15. method as claimed in claim 9, wherein, described group of technological parameter comprises the hot compression percentage of described steel product.
16. method as claimed in claim 9, wherein, described group of technological parameter comprises the cooldown rate of described steel product.
17. method as claimed in claim 16, wherein, described group of technological parameter comprises the hot-rolled temperature of described steel product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23639000P | 2000-09-29 | 2000-09-29 | |
| US60/236,390 | 2000-09-29 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018158358A Division CN1308100C (en) | 2000-09-29 | 2001-09-28 | Method of providing steel strip to order |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1820875A true CN1820875A (en) | 2006-08-23 |
Family
ID=22889290
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100067933A Pending CN1820875A (en) | 2000-09-29 | 2001-09-28 | Method for custom-making steel strip |
| CNB018158358A Expired - Fee Related CN1308100C (en) | 2000-09-29 | 2001-09-28 | Method of providing steel strip to order |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018158358A Expired - Fee Related CN1308100C (en) | 2000-09-29 | 2001-09-28 | Method of providing steel strip to order |
Country Status (15)
| Country | Link |
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| EP (1) | EP1326724B1 (en) |
| JP (1) | JP2004508943A (en) |
| KR (1) | KR100868143B1 (en) |
| CN (2) | CN1820875A (en) |
| AT (1) | ATE349288T1 (en) |
| AU (2) | AU2001291504B2 (en) |
| BR (1) | BR0114337A (en) |
| CA (1) | CA2421668C (en) |
| DE (1) | DE60125562T2 (en) |
| ES (1) | ES2282290T3 (en) |
| MX (1) | MXPA03002134A (en) |
| MY (1) | MY126907A (en) |
| RU (1) | RU2282521C2 (en) |
| TW (1) | TW589520B (en) |
| WO (1) | WO2002026423A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102446296A (en) * | 2010-10-11 | 2012-05-09 | 宇锋科技股份有限公司 | Intelligent full automatic machine station online platform and operation method thereof |
| CN105224739A (en) * | 2015-09-25 | 2016-01-06 | 深圳市参数领航科技有限公司 | A kind of method and system being applied to the combing of PCB specification |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7404431B2 (en) | 2002-06-04 | 2008-07-29 | Nucor Corporation | Production of thin steel strip |
| US7938164B2 (en) | 2002-06-04 | 2011-05-10 | Nucor Corporation | Production of thin steel strip |
| JP4383493B2 (en) * | 2007-08-17 | 2009-12-16 | 新日本製鐵株式会社 | Material information providing method and material information using method of high-tensile steel sheet with TS of 780 MPa or more |
| EP2346631B1 (en) * | 2008-11-04 | 2015-07-22 | SMS Siemag Aktiengesellschaft | Method and device for controlling the solidification of a cast strand in a continuous casting plant at startup of the casting process |
| EP2427281B1 (en) * | 2009-05-06 | 2014-03-05 | Siemens Aktiengesellschaft | Method for producing a milling product milled in a mill train of a mill assembly, control and/or regulating device for a mill assembly for producing milled products and/or milled product section, mill assembly for producing milled products, machine readable program code and storage medium |
| US8042602B2 (en) * | 2009-06-16 | 2011-10-25 | Nucor Corporation | High efficiency plant for making steel |
| US9156082B2 (en) | 2013-06-04 | 2015-10-13 | Nucor Corporation | Method of continuously casting thin strip |
| CN109940047B (en) * | 2019-03-28 | 2021-01-26 | 首钢智新迁安电磁材料有限公司 | Method and device for cooperative control of silicon steel size |
| CN110404965B (en) * | 2019-08-15 | 2020-05-29 | 重庆大学 | Method and model system for designing hot-rolled medium plate group and plate blank considering non-scale order specification flexibility |
| CN115090846B (en) * | 2022-08-08 | 2024-03-26 | 重庆钢铁股份有限公司 | Method for shortening production switching time of casting machine |
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|---|---|---|---|---|
| JPH04319004A (en) * | 1991-04-18 | 1992-11-10 | Sumitomo Metal Ind Ltd | Device and method for changing width of hot rolled sheet in flying |
| AU645699B2 (en) * | 1991-06-04 | 1994-01-20 | Nippon Steel Corporation | Method of estimating material of steel product |
| DE19508476A1 (en) * | 1995-03-09 | 1996-09-12 | Siemens Ag | Control system for a plant in the basic material or processing industry or similar |
| DE19508474A1 (en) * | 1995-03-09 | 1996-09-19 | Siemens Ag | Intelligent computer control system |
| JP3083247B2 (en) * | 1995-07-26 | 2000-09-04 | 新日本製鐵株式会社 | Method for producing stainless steel strip by continuous casting hot rolling and heat treatment furnace for continuous casting hot rolling of stainless steel strip |
| JPH10540A (en) * | 1996-06-11 | 1998-01-06 | Nippon Steel Corp | Integrated manufacturing design processing system |
| JPH10235540A (en) * | 1997-02-25 | 1998-09-08 | Nippon Steel Corp | Scheduling system for manufacturing process |
| IT1291931B1 (en) * | 1997-06-19 | 1999-01-21 | Voest Alpine Ind Anlagen | PROCEDURE FOR THE PRODUCTION OF RAW STEEL CASTING TAPES WITH LOW CARBON CONTENT AND THIS OBTAINABLE TAPES |
| JP3409297B2 (en) * | 1997-07-18 | 2003-05-26 | 日本鋼管株式会社 | Manufacturing instruction creation device |
| JP3367872B2 (en) * | 1997-08-08 | 2003-01-20 | 新日本製鐵株式会社 | How to determine the order of production orders during continuous casting |
| DE19832762C2 (en) * | 1998-07-21 | 2003-05-08 | Fraunhofer Ges Forschung | Casting and rolling mill, in particular thin slab casting and rolling mill |
| JP2001265421A (en) * | 2000-03-22 | 2001-09-28 | Kawasaki Steel Corp | Order acceptance information processor |
-
2001
- 2001-09-28 EP EP01971505A patent/EP1326724B1/en not_active Revoked
- 2001-09-28 AT AT01971505T patent/ATE349288T1/en not_active IP Right Cessation
- 2001-09-28 CA CA2421668A patent/CA2421668C/en not_active Expired - Lifetime
- 2001-09-28 CN CNA2006100067933A patent/CN1820875A/en active Pending
- 2001-09-28 AU AU2001291504A patent/AU2001291504B2/en not_active Ceased
- 2001-09-28 JP JP2002530242A patent/JP2004508943A/en active Pending
- 2001-09-28 TW TW090124329A patent/TW589520B/en not_active IP Right Cessation
- 2001-09-28 ES ES01971505T patent/ES2282290T3/en not_active Expired - Lifetime
- 2001-09-28 MX MXPA03002134A patent/MXPA03002134A/en active IP Right Grant
- 2001-09-28 CN CNB018158358A patent/CN1308100C/en not_active Expired - Fee Related
- 2001-09-28 DE DE60125562T patent/DE60125562T2/en not_active Revoked
- 2001-09-28 KR KR1020037004586A patent/KR100868143B1/en not_active IP Right Cessation
- 2001-09-28 BR BR0114337-9A patent/BR0114337A/en not_active Application Discontinuation
- 2001-09-28 AU AU9150401A patent/AU9150401A/en active Pending
- 2001-09-28 WO PCT/AU2001/001227 patent/WO2002026423A1/en active IP Right Grant
- 2001-09-28 RU RU2003112468/02A patent/RU2282521C2/en not_active IP Right Cessation
- 2001-09-29 MY MYPI20014573A patent/MY126907A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102446296A (en) * | 2010-10-11 | 2012-05-09 | 宇锋科技股份有限公司 | Intelligent full automatic machine station online platform and operation method thereof |
| CN105224739A (en) * | 2015-09-25 | 2016-01-06 | 深圳市参数领航科技有限公司 | A kind of method and system being applied to the combing of PCB specification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1458869A (en) | 2003-11-26 |
| EP1326724A4 (en) | 2004-06-23 |
| KR100868143B1 (en) | 2008-11-10 |
| TW589520B (en) | 2004-06-01 |
| AU9150401A (en) | 2002-04-08 |
| AU2001291504B2 (en) | 2006-06-08 |
| KR20030064761A (en) | 2003-08-02 |
| ATE349288T1 (en) | 2007-01-15 |
| DE60125562D1 (en) | 2007-02-08 |
| BR0114337A (en) | 2003-08-26 |
| JP2004508943A (en) | 2004-03-25 |
| EP1326724A1 (en) | 2003-07-16 |
| DE60125562T2 (en) | 2007-10-11 |
| CA2421668A1 (en) | 2002-04-04 |
| EP1326724B1 (en) | 2006-12-27 |
| MXPA03002134A (en) | 2005-06-30 |
| CA2421668C (en) | 2012-02-07 |
| ES2282290T3 (en) | 2007-10-16 |
| RU2282521C2 (en) | 2006-08-27 |
| MY126907A (en) | 2006-10-31 |
| CN1308100C (en) | 2007-04-04 |
| WO2002026423A1 (en) | 2002-04-04 |
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