CN113828747B - Production method of thick cast-rolled plate - Google Patents
Production method of thick cast-rolled plate Download PDFInfo
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- CN113828747B CN113828747B CN202111128909.1A CN202111128909A CN113828747B CN 113828747 B CN113828747 B CN 113828747B CN 202111128909 A CN202111128909 A CN 202111128909A CN 113828747 B CN113828747 B CN 113828747B
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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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
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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
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
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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
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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
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
-
- 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
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
Abstract
The invention relates to the technical field of metal cast-rolled plate production, in particular to a production method of a thick cast-rolled plate, which comprises the following steps: (1) Preparing a vertical plate, reasonably determining the size of an original casting roll seam, the opening degree of a casting nozzle, a casting rolling area and other early-stage preparation works; (2) In the operation of the vertical plate, rolling technological parameters such as the temperature of the outlet flow pipe of the filter box, the temperature of the front box, the temperature of a roller and the like are controlled; (3) Normal production parameters are optimized and adjusted, and technological parameters such as addition of Al-Ti-B grain refined wires and the like are reasonably determined. The hot state and edge lack phenomena and the phenomena of nozzle casting and aluminum liquid explosion do not occur in the vertical plate, so that the success rate of the vertical plate of a plate with the thickness of 10mm is greatly improved, the plate quality is ensured, a cast-rolled plate with the thickness of 10mm (thickness) multiplied by 860mm (width) is successfully produced on a horizontal or inclined cast-rolling machine with the thickness of less than or equal to 7mm, the product quality is stable, the design requirements are met, and the method can be put into industrial production.
Description
Technical Field
The invention relates to the technical field of metal cast-rolled plate production, in particular to a production method of a thick cast-rolled plate.
Background
In the production of aluminum alloy cast-rolled plates, the thickness of aluminum produced by a cast-rolling method and aluminum alloy cast-rolled plates is generally less than or equal to 7mm, and nowadays, with the development of society, thicker aluminum alloy plates are increasingly demanded by markets, and many enterprises begin to explore and produce thicker plates. With the increase of the thickness of the produced cast-rolled plate, particularly the cast-rolled plate with the thickness of more than or equal to 10mm is produced, because the technical configuration of the cast-rolling equipment has the defects of insufficient rolling force, low input current power and the like, the shutdown and the equipment damage are easy to occur; the following appears in the technical and control aspects of the rolling process: due to the problems of insufficient flow supply of the aluminum melt, a casting nozzle assembly process, a rolling process and the like, the cast-rolled plate is unqualified in plate type, and the internal structure (grain size) is thick and uneven, so that the product is unqualified.
The vertical plate is used for producing a cast-rolled product with the thickness of more than 10mm, the difficulty in casting and rolling the vertical plate is increased compared with the conventional 6.3mm, and the control requirement of the whole operation process is higher.
Under the condition that other parameters are unchanged, the thicker the production thickness is, the more difficult the grain size is to control, so that the grain size of the internal structure of the plate produced after the vertical plate can not reach the technical standard, and the product is unqualified.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production method of a thick cast-rolled plate aiming at the defects in the prior art.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a production method of a thick cast-rolled plate is characterized by comprising the following steps:
step 1: preparing a vertical plate:
a. guiding the smelted aluminum alloy melt into a heat preservation furnace for standing, wherein the temperature of aluminum liquid in the heat preservation furnace is set to be 780-790 ℃, the temperature of a degassing box body is set to be 800-900 ℃, and the temperature of a filter box body is set to be 800-900 ℃;
b. setting roll parameters, wherein the roll diameter is phi 584mm, the roll crown is 0.22mm, the roll elasticity variation is comprehensively considered, the roll gap of the two rolls is set to be 9.0mm according to 1.0mm, the length of a casting and rolling area is set to be 55mm, the opening degree of a casting nozzle is set to be 18mm, the mounting gap of the nozzle roll is 0.5mm, the mounting gap of an ear and the roll is set to be 0mm, the ear is chamfered by 35 degrees, an aluminum liquid baffle at the roll gap is required to be free of gaps with the ear and upper and lower rolls, and aluminum liquid does not flow when contacting with the baffle after entering the casting and rolling area;
step 2: erecting the plate:
a. starting a casting and rolling machine, enabling the aluminum alloy melt in the heat preservation furnace to reach a degassing tank to degas, enabling the aluminum alloy melt to flow through a filter tank, controlling the temperature of a flow pipe at the outlet of the filter tank to be 735-740 ℃, the temperature of a front tank to be 685-710 ℃, the temperature of a roller to be 35-45 ℃, and controlling the liquid level height of the front tank to be 1/2 of a scribing position at the rear end of an upper casting nozzle and keeping the aluminum alloy melt stable;
b. starting a discharging vertical plate, starting a rolling mill when the molten aluminum alloy is filled in a nozzle cavity of the casting nozzle, starting the rolling mill at the speed of 0.7m/min when cooling water is not started, discharging the aluminum alloy out of the plate, starting water circulation after the aluminum alloy is exhausted, and increasing the speed of the strip to 0.95m/min after the cooling water of the roller is started;
and step 3: normal production operation:
after the vertical plate is successfully erected, the temperature of the front box is adjusted to be 693-697 ℃, and the temperature of the roller cooling water is 35-38 ℃; controlling the grain size of the plate: c-grade Al-Ti-B wire is adopted, the addition amount is 2.5kg/t.Al, and the addition point temperature of the Al-Ti-B wire is 690-740 ℃.
Preferably, the thickness of the aluminum alloy plate strip produced by the production method is 10mm.
Preferably, after the plate is erected, for a plate shape with the thickness of 10mm, the rolling force on two sides of the casting roller is adjusted to be 19-23 Mpa, the tension is 3500kg, and the roller is lubricated by flame.
Preferably, the adding speed of the Al-Ti-B wire is 0.22m/min, and the adding point temperature of the Al-Ti-B wire is 715-725 ℃.
The invention has the following advantages and beneficial effects:
1. the vertical casting and rolling plate is divided into two processes of preparation and operation, and the invention controls various parameters in the vertical casting and rolling plate preparation operation, such as: reasonably adjusting to determine the size of an original casting roll gap, and determining the opening degree of a casting nozzle, a casting and rolling area and other early-stage preparation works according to the size condition of the roll gap. In the operation process of casting and rolling the vertical plate, parameters such as the temperature of the outlet flow pipe of the filter box, the temperature of the front box, the temperature of a roller, the starting speed of a rolling mill, the casting and rolling speed after plate discharging and the like are controlled, and the vertical plate has no hot state and edge defect phenomenon and has no nozzle and aluminum liquid explosion phenomenon, so that the success rate of the vertical plate of a plate with the thickness of 10mm is greatly improved. The technical problems that when a horizontal casting and rolling machine produces 10mm aluminum alloy casting and rolling products, because the opening degree of a casting nozzle is large, the flow rate of molten aluminum is high, the solidification of the molten aluminum in a casting and rolling area is low, and the phenomenon of hot bands is easy to occur during vertical plates, so that the vertical plates are difficult to erect and even fail are solved.
2. According to the invention, after the vertical plate succeeds, a cast-rolled product with the thickness of 10mm is normally produced, and the adjustment and control of various parameters are carried out firstly, such as: the parameters of the front box temperature, the addition amount of the Al-Ti-B wire, the addition point temperature of the Al-Ti-B wire, the rolling force and the like are firstly regulated and controlled, so that the plate shape, the grain size, the thickness and the surface quality can be well controlled, the quality of a plate product can meet the technical standard requirement of the process, and a qualified cast-rolled product with the thickness of 10mm can be normally produced.
The method reasonably determines the addition process parameters of the Al-Ti-B grain refining wire and the process parameters of rolling and the like, improves the success rate of the vertical plate and the quality of the plate, and successfully casts and rolls the qualified plate with the thickness of 10mm multiplied by 860 mm. The cast-rolled plate with the thickness of 10mm is successfully produced on a horizontal or inclined cast-rolling machine with the thickness of less than or equal to 7mm, the product quality is stable, the design requirement is met, and the method can be put into industrial production.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will clearly and completely describe the technical solutions in the embodiments, and obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A production method of a thick cast-rolled plate comprises the following steps:
step 1: preparing a vertical plate:
a. introducing the smelted aluminum alloy melt into a heat preservation furnace for standing, wherein the temperature of aluminum liquid in the heat preservation furnace is set to be 780-790 ℃, the temperature of a degassing box body is set to be 800-900 ℃, and the temperature of a filter box body is set to be 800-900 ℃.
b. The method comprises the steps of setting roll parameters, setting the roll diameter to be phi 584mm, setting the roll crown to be 0.22mm, comprehensively considering roll elasticity variation, setting the roll gap of two rolls to be 9.0mm according to 1.0mm, setting the length of a casting and rolling area to be 55mm, setting the opening degree of a casting nozzle to be 18mm, setting the installation gap of the nozzle roll to be 0.5mm, setting the installation gap of lugs and the roll to be 0mm, chamfering the lugs to be 35 degrees, setting the requirement of an aluminum liquid baffle at the roll gap to be gapless with the lugs and upper and lower rolls, and preventing aluminum from flowing when the aluminum liquid is contacted with the baffles after entering the casting and rolling area.
And 2, step: erecting the plate:
a. and starting the casting and rolling machine, enabling the aluminum alloy melt in the heat preservation furnace to reach the degassing tank, degassing, and enabling the aluminum alloy melt to flow through the filter tank, controlling the temperature of a flow pipe at the outlet of the filter tank to be 735-740 ℃, controlling the temperature of the front tank to be 685-710 ℃, controlling the temperature of the roller to be 35-45 ℃, controlling the liquid level height of the front tank to be 1/2 of the marking line at the rear end of the upper casting nozzle, and keeping the aluminum alloy melt stable.
b. And (3) starting discharging the vertical plate, starting the rolling mill when the molten aluminum alloy is filled in the nozzle cavity of the casting nozzle, starting the rolling mill at the speed of 0.7m/min when cooling water is not started, discharging the plate and then at the rolling speed of 0.8-0.9 m/min, starting water circulation after the gas is discharged from the aluminum liquid, and increasing the speed of the strip to 0.95m/min after the cooling water of the roller is started.
And step 3: normal production operation:
after the vertical plate is successfully erected, the temperature of the front box is adjusted to be 693-697 ℃, and the temperature of the roller cooling water is 35-38 ℃; controlling the grain size of the plate: c-grade Al-Ti-B wire is adopted, the addition amount is 2.5kg/t.Al, the temperature of the addition point of the Al-Ti-B wire is 690-740 ℃, and the rest parameters are kept unchanged according to the step 2.
According to the invention, the thickness of the produced aluminum alloy plate strip is more than or equal to 10mm, and 10-12mm cast-rolled plates can be produced by setting the parameters.
Furthermore, after the vertical plate is erected, for a plate shape with the thickness of 10mm, the rolling force on two sides of a casting roller is adjusted to be 19-23 Mpa, the tension is 3500kg, and the roller is lubricated by flame.
Further, the adding speed of the Al-Ti-B wire is 0.22m/min, and the adding point temperature of the Al-Ti-B wire is 715-725 ℃.
Because the vertical plate is used for producing a cast-rolled product with the thickness of 10mm, the difficulty of producing the vertical plate by casting and rolling is increased compared with the conventional production of 6.3mm, the control requirement of the whole operation process is higher, and the production of the product can be carried out only if the vertical plate is ensured to be successful.
The method comprises the steps of producing a 1060-component aluminum alloy cast-rolled product with the thickness of 10mm by a cast-rolling method, firstly, considering the elastic change condition of a roller gap of a roller after the roller of a rolling mill is loaded, the deformation resistance generated during alloy production rolling and the influence condition of the width of the product on the roller gap during production to determine the size of the original cast-rolling roller gap, and ensuring that the thickness of the plate after the plate is produced meets the production requirement; determining the opening degree of the produced product during the manufacturing of the casting nozzle according to the size of the roll gap; determining a casting and rolling area during casting and rolling production according to the client and the technical standard, the roller parameters, the aluminum alloy components, the thickness and the width; preparing tools and tools required by the vertical plate; controlling the temperature of each point; the mounting quality of the casting nozzle and the lug is ensured; preparing and checking a casting and rolling mill train; the roll lubrication system is prepared for preliminary preparation work such as inspection.
A horizontal casting and rolling machine is adopted to research, develop and produce a casting and rolling product of 10mm by 860mm aluminum alloy with 1060 components, and after comprehensive analysis and consideration, control parameters of the vertical plate at this time are prepared and formulated as shown in a table 1.
After the earlier-stage preparation process of the cast-rolling vertical plate is completed, when the operation condition of the aluminum-discharging vertical plate is checked, because a 10mm aluminum alloy cast-rolling product is produced by adopting a horizontal type cast-rolling machine, the opening degree of a casting nozzle is larger, the flow rate of aluminum liquid is higher, the solidification of the aluminum liquid in a cast-rolling area is slower, a tropical phenomenon is easy to occur during the vertical plate, the vertical plate is difficult to process once the tropical phenomenon occurs, the vertical plate is finally directly failed, and the operation difficulty of the vertical plate is higher. Therefore, the control parameters and requirements of the operator at each point in the operation process of the vertical plate are well customized and executed according to the operation control requirements of the vertical plate, as shown in the table 2.
After the vertical plate is successfully produced, a cast-rolled product with the thickness of 10mm is normally produced, the product quality needs to meet the requirements of customers and technical standards, the plate type, the grain size, the thickness and the surface quality need to be well controlled in the production process, and the normal production control and parameter formulation are shown in the table 3.
By using the production method of the cast-rolled plate, a company adopts a horizontal casting-rolling machine to research and develop and produce a 1060 component 10mm by 860mm aluminum alloy cast-rolled product.
Grain size and other qualities:
under the condition that other parameters are unchanged, the thicker the production thickness is, the more difficult the grain size is to control, the operation steps and the process requirements for production are controlled, C-grade Al-Ti-B wires are adopted, the addition amount is 2.5kg/t.Al, the temperature of the addition point of the Al-Ti-B wires is controlled to be 715-725 ℃, the low-speed, low-pouring temperature and low cooling water temperature are controlled, samples are taken to be used for a grain size corrosion experiment of a low-magnification tissue of a cast-rolled product, and the grain size of an internal tissue reaches the technical standard: and (4) level 1.
Producing the actual measurement data of the plate type of the cast-rolled plate with the thickness of 10 mm:
sampling and detecting the plate shape result of the cast-rolled product: the transverse edge difference, the convexity, the thickness and the width all reach the technical standard; sampling and measuring the thickness range of the cold-state cast-rolled product: 10.40-10.50 mm, to achieve the desired target, as shown in table 4.
The invention greatly improves the success rate of the vertical plate and the quality of the plate by reasonably determining the addition process parameters of the Al-Ti-B grain refining wire and reasonably determining the process parameters of rolling and the like, and successfully casts and rolls the qualified plate with the thickness of 10mm multiplied by 860 mm. The cast-rolled plate with the thickness of 10mm is successfully produced on a horizontal or inclined cast-rolling machine with the thickness of less than or equal to 7mm, the product quality is stable, the design requirement is met, and the method can be put into industrial production.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A production method of a thick cast-rolled plate is provided, the thickness of an aluminum alloy plate strip produced by the production method is 10mm, and the production method is characterized in that:
step 1: preparing a vertical plate:
a. guiding the smelted aluminum alloy melt into a heat preservation furnace for standing, wherein the temperature of aluminum liquid in the heat preservation furnace is set to be 780-790 ℃, the temperature of a degassing box body is set to be 800-900 ℃, and the temperature of a filter box body is set to be 800-900 ℃;
b. setting roll parameters, wherein the roll diameter is 584mm, the roll crown is 0.22mm, the elastic variation of the rolls is comprehensively considered, the roll gap of the two rolls is set to be 9.0mm according to 1.0mm, the length of a cast rolling area is set to be 55mm, the opening degree of a casting nozzle is set to be 18mm, the installation gap of the nozzle roll is 0.5mm, the installation gap of an ear and the rolls is set to be 0mm, the ear is chamfered by 35 degrees, an aluminum liquid baffle at the roll gap is required to have no gap with the ear and upper and lower rolls, and aluminum liquid does not flow when contacting with the baffle after entering the cast rolling area;
step 2: and (3) carrying out riser operation:
a. starting a casting and rolling machine, enabling the aluminum alloy melt in the heat preservation furnace to reach a degassing tank to degas, enabling the aluminum alloy melt to flow through a filter tank, controlling the temperature of a flow pipe at the outlet of the filter tank to be 735-740 ℃, the temperature of a front tank to be 685-710 ℃, the temperature of a roller to be 35-45 ℃, and controlling the liquid level height of the front tank to be 1/2 of a scribing position at the rear end of an upper casting nozzle and keeping the aluminum alloy melt stable;
b. starting a discharging vertical plate, starting a rolling mill when the molten aluminum alloy is filled in a nozzle cavity of the casting nozzle, starting the rolling mill at the speed of 0.7m/min when cooling water is not started, discharging the aluminum alloy out of the plate, starting water circulation after the aluminum alloy is exhausted, and increasing the speed of the strip to 0.95m/min after the cooling water of the roller is started;
and step 3: normal production operation:
after the vertical plate is successfully arranged, the temperature of the front box is adjusted to be 693-697 ℃, and the temperature of the roller cooling water is 35-38 ℃; controlling the grain size of the plate: a C-grade Al-Ti-B wire is adopted, the addition amount is 2.5kg/t.Al, and the addition point temperature of the Al-Ti-B wire is 690-740 ℃.
2. The production method of a thick cast-rolled plate according to claim 1, characterized in that: after the plate is erected, for a plate shape with the thickness of 10mm, the rolling force of two sides of a casting roller is adjusted to be 19-23 Mpa, the tension is 3500kg, and the roller is lubricated by flame.
3. The production method of a thick cast-rolled plate according to claim 2, characterized in that: the adding speed of the Al-Ti-B wire is 0.22m/min, and the adding point temperature of the Al-Ti-B wire is 715-725 ℃.
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| CN114879778A (en) * | 2022-04-19 | 2022-08-09 | 晟通科技集团有限公司 | Aluminum liquid temperature control device and aluminum liquid temperature control method |
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| CN101362150A (en) * | 2008-09-08 | 2009-02-11 | 张明 | Double-roller casting rolling mill capable of arbitrarily adjusting roll gap |
| KR20110069598A (en) * | 2009-12-17 | 2011-06-23 | 주식회사 포스코 | An apparatus and method for controlling wedge of strip in twin roll strip casting process |
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| JP2000052000A (en) * | 1998-08-13 | 2000-02-22 | Fuji Photo Film Co Ltd | Method for continuously casting and rolling aluminum alloy thin sheet |
| CN102912191B (en) * | 2011-08-01 | 2015-01-07 | 江阴新仁科技有限公司 | 3003 reflective foil aluminum alloy and processing technology |
| CN104148601B (en) * | 2014-08-26 | 2016-03-30 | 青海桥头铝电股份有限公司 | A kind of super thick aluminium alloy casting plate producing process |
| JP6511968B2 (en) * | 2015-06-03 | 2019-05-15 | 日産自動車株式会社 | Twin-roll vertical casting apparatus and twin-roll vertical casting method |
| CN105397045B (en) * | 2015-12-21 | 2017-11-10 | 东北大学 | The casting and rolling device and casting-rolling method of a kind of aluminum alloy slab |
| CN107186190A (en) * | 2017-06-14 | 2017-09-22 | 河南省淅川县有色金属压延有限公司 | A kind of casting-rolling production method of the aluminium alloy plate of high-intensity wide-amplitude 3003 |
| CN111761036B (en) * | 2020-07-08 | 2022-03-01 | 甘肃东兴铝业有限公司 | Casting and rolling method for 6xxx series aluminum alloy plate for automobile |
| CN111793759B (en) * | 2020-08-11 | 2021-11-23 | 华北铝业有限公司 | 1070 high-performance aluminum foil for lithium ion battery and preparation method thereof |
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|---|---|---|---|---|
| CN101362150A (en) * | 2008-09-08 | 2009-02-11 | 张明 | Double-roller casting rolling mill capable of arbitrarily adjusting roll gap |
| KR20110069598A (en) * | 2009-12-17 | 2011-06-23 | 주식회사 포스코 | An apparatus and method for controlling wedge of strip in twin roll strip casting process |
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