CN114231862A - Production process and application of T4P-state aluminum alloy narrow coiled plate - Google Patents
Production process and application of T4P-state aluminum alloy narrow coiled plate Download PDFInfo
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- CN114231862A CN114231862A CN202111494059.7A CN202111494059A CN114231862A CN 114231862 A CN114231862 A CN 114231862A CN 202111494059 A CN202111494059 A CN 202111494059A CN 114231862 A CN114231862 A CN 114231862A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
Abstract
The invention relates to a production process of a T4P-state aluminum alloy narrow coiled plate, which comprises the following steps: fast cooling and continuous casting of aluminum alloy, continuous expansion and extrusion, online water quenching treatment, coiling and pre-aging treatment; the cooling speed of the rapid cooling continuous casting is 200-; continuously expanding and extruding the aluminum alloy billet into a narrow coiled plate with the thickness of 4-30mm and the width of 80-300mm through an expansion die cavity, and controlling the temperature of an outlet of the expansion die cavity to 400-540 ℃; and cooling water for performing online water quenching treatment on the narrow coiled plate is arranged at the position of 10-50mm of the outlet of the expanded die cavity, and is coiled and subjected to pre-aging treatment. According to the invention, through continuous expansion extrusion and outlet online water quenching after the aluminum alloy is subjected to rapid cooling and continuous casting, a T4P state product with good solid solution effect can be obtained, and the structure and the performance of the whole roll of plate are uniform and consistent; compared with a large ingot casting-hot rolling process product, the method has the advantages that the narrow coiled sheet is directly formed through continuous expanding extrusion, slitting/trimming treatment is not needed, and the yield is effectively improved.
Description
Technical Field
The invention relates to the technical field of metal plastic processing, in particular to a production process and application of a T4P state aluminum alloy narrow coiled plate.
Background
With the rapid development of advanced manufacturing industry, the aluminum-based metal layered composite material has the characteristics of small aluminum density, good electrical conductivity, thermal conductivity, corrosion resistance, mechanical property and the like, provides better conditions for reasonable material selection and cost reduction, draws more and more attention to people, and is widely applied to the fields of aviation, aerospace, national defense, traffic, electronics, communication and the like. The aluminum-based metal laminated composite material is usually prepared from an aluminum alloy narrow coiled sheet by a rolling composite method.
The rolling compounding method is a process for combining component layers by rolling two or more layers of stacked metals or alloys under large reduction and relying on the metal bond action between atoms. Under the combined action of the two mechanisms, firm point bonding between dissimilar metal elements is formed. In addition, the rolling and compounding method can be used for roll continuous production, the thickness ratio of the component layer alloy is uniform, the product size is accurate, the performance is stable, and the production efficiency is high. Compared with the wide plate rolling compounding, the narrow-band rolling compounding has the advantages that although the production efficiency is reduced, the rigidity and the unit pressure of the rolling mill are higher, and the interface bonding strength of the rolled composite plate and the precision of the product size are improved.
At present, the production process of aluminum alloy narrow coil plates at home and abroad is mainly a semi-continuous ingot casting-rolling method, which comprises a semi-continuous casting slab ingot hot rolling method and a semi-continuous casting rod hot continuous rolling method, and comprises the following process steps:
(1) a semi-continuous casting slab ingot hot rolling method (as shown in figure 2) comprises the following process flows: semi-continuous casting of flat ingots, ingot homogenization, ingot heating, hot rolling of wide coiled sheets and slitting of narrow coiled sheets. If the process method is used for producing large-coil-weight aluminum alloy coil plates, large-thickness cast slab ingots are needed, so that corresponding main equipment such as a casting machine, a heating furnace, a heat engine and the like are large-sized, the investment is large, the occupied area is large, the energy consumption is high, the geometric waste in the production process of slitting narrow coil plates and the like is high, and the product yield is low.
(2) The semi-continuous casting bar hot continuous rolling method (as shown in figure 3) comprises the following process flows: semi-continuous casting of round ingots, ingot homogenization, ingot heating, hot continuous rolling and narrow plate rolling. In order to remarkably improve the rolling benefit of the narrow coiled plate, a continuous rolling process with higher efficiency is mainly adopted during production, and the continuous rolling process generally comprises rough rolling, intermediate rolling and finish rolling. In the continuous rolling process of the narrow coiled sheet, the blank needs to be rolled in a plurality of frames at the same time, the processing deformation from a large-section round ingot blank to a small-section narrow coiled sheet is realized, the application of a high-level control technology can ensure the production efficiency and the production quality, and the method has the advantages of high production efficiency, mechanization of the process, high automation degree and the like, and can also obtain the narrow coiled sheet with larger coil weight (generally within 300 Kg); correspondingly, the process has high yield and less waste loss rate than the semi-continuous casting flat ingot hot rolling method for producing narrow coiled plates. However, this process also has a number of disadvantages, namely: the process is complex, the rolling speed and the initial rolling temperature need to be strictly controlled, and the operation difficulty is high.
In addition to the above problems, the aluminum alloy narrow coiled sheet product produced by the semi-continuous ingot casting-rolling method is in a hot working state, and in the process of producing the aluminum-based metal layer-shaped composite plate by the rolling composite method, as shown in fig. 4, T4P treatment of solution heating and quenching is also needed, the process operation is quite difficult for the aluminum alloy narrow coiled sheet with large coil weight, and the layered composite material is easy to generate product quality problems such as cracking, deformation, uneven performance and the like in the subsequent solution quenching treatment process.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides a production process of a T4P-state aluminum alloy narrow coiled plate, which mainly comprises the production processes of aluminum alloy quick-cooling continuous casting, continuous expanding extrusion, online water quenching treatment, coiling and the like. Compared with the prior art, the cutting/trimming treatment is not needed, and the yield is higher; the invention can directly obtain the T4P product with good solid solution effect by continuously expanding, extruding and water quenching treatment after the aluminum alloy is rapidly cooled and continuously cast and continuously extruding and discharging, is used for producing the metal laminated composite material by rolling and compounding, does not need solid solution quenching treatment and surface cleaning treatment, can directly carry out aging treatment after rolling and compounding, and avoids the product problems of cracking, deformation, uneven performance and the like of the metal laminated composite material in the subsequent solid solution quenching treatment process. The invention also relates to application of the narrow coiled sheet material of the aluminum alloy in the T4P state in rolling and compounding production of the aluminum-based layered composite material.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the invention provides a production process of a T4P-state aluminum alloy narrow coiled sheet, which comprises the following steps: fast cooling and continuous casting of aluminum alloy, continuous expansion and extrusion, online water quenching treatment, coiling and pre-aging treatment;
the cooling speed of the rapid cooling continuous casting is 200-;
when in continuous expansion extrusion, the aluminum alloy billet is continuously expanded and extruded into a narrow coiled sheet material with the thickness of 4-30mm and the width of 80-300mm through an expansion die cavity, and the temperature of an outlet of the expansion die cavity is controlled to be 400-540 ℃; and cooling water for performing online water quenching treatment on the narrow coiled sheet is arranged at a position 10-50mm away from the outlet of the expansion die cavity.
According to a preferred embodiment of the invention, the continuous rapid cooling casting is a belt or crawler type or horizontal continuous casting.
According to the preferred embodiment of the present invention, the cooling rate of the rapid cooling continuous casting is 250-. Preferably, the aluminum alloy rod blank is a round or approximately square coiled rod blank, and then is extruded into a large-section aluminum alloy plate through continuous expansion.
According to the preferred embodiment of the present invention, in the continuous extrusion, a single-wheel single-groove aluminum continuous extruder of 400 type, 550 type or 600 type is used, and the extrusion is carried out by using an expanded die cavity.
According to the preferred embodiment of the present invention, the rotation speed of the extrusion wheel of the continuous extruder is 3-12rpm in the continuous expansion extrusion.
According to the preferred embodiment of the invention, the distance between the cooling water and the outlet of the expansion die cavity is controlled to be 20-30 mm. The narrow coiled plate obtained by continuous expansion and extrusion after fast cooling and continuous casting of the aluminum alloy is subjected to online water quenching treatment, so that a T4P state product with good solid solution effect can be directly obtained, and the structure and the performance of the whole coiled plate are uniform and consistent.
According to the preferred embodiment of the invention, the cooling water is sprayed to the surface of the narrow rolled plate from the extended die cavity by a spraying device for quenching, and the temperature of the quenched product is controlled to be 50-100 ℃.
In the coiling procedure, coiling can be carried out according to the weight or the length required by a user, and the length or the weight of a product is not limited by the process; compared with a large ingot casting-hot rolling process product, the technology for preparing the narrow-coil plate by using the aluminum alloy billet with the small diameter through the continuous expanding extrusion of the expanding die cavity does not need to perform slitting and trimming treatment, and the yield is higher.
According to a preferred embodiment of the present invention, the pre-aging conditions are: keeping the temperature of 105-140 ℃ for 1-4 hours, preferably 115-125 ℃ for 2-3 hours.
According to the preferred embodiment of the invention, the aluminum alloy narrow-rolled plate is a 6-series, 2-series or 7-series high-performance aluminum alloy narrow-rolled plate.
In a second aspect, the invention provides a use of the narrow rolled aluminum alloy sheet in the T4P temper according to any of the above embodiments in preparing a metal laminated composite plate by roll lamination.
According to the preferred embodiment of the invention, after the T4P state aluminum alloy narrow coiled sheet is adopted to be rolled and compounded to prepare the metal laminated composite plate, the aging treatment is directly carried out without carrying out the solution quenching treatment and the surface cleaning treatment.
(III) advantageous effects
(1) The product prepared by the process is in a T4P state with good solid solution effect, the structure and the performance of the whole roll of the plate are uniform, and when the rolling composite method is adopted to prepare the aluminum-based metal laminated composite plate, the aging treatment can be directly carried out after the composite plate is prepared, so that the product quality problems of cracking, deformation, non-uniform performance and the like of the metal laminated composite plate in the subsequent solid solution quenching treatment process are solved.
(2) When the T4P state aluminum alloy narrow coil plate is prepared by the process, the aluminum alloy billet with the equivalent diameter of 20-40mm is continuously expanded and extruded into the narrow coil plate with the thickness of 4-30mm and the width of 80-300mm, so that slitting or trimming treatment is required.
(3) Compared with the traditional semi-continuous ingot casting-rolling method, the process for preparing the aluminum alloy narrow-rolled plate in the T4P state is shorter in process flow, the product is in the T4P state with good solid solution effect, the structure and the performance of the whole-rolled plate are uniform, and the scheme provides a new technical thought for the development, development and production and application of 6-series and/or 2-series and/or 7-series high-performance aluminum alloy narrow-rolled plate.
Drawings
FIG. 1 is a flow chart of the production process of the T4P status aluminum alloy narrow coil plate.
FIG. 2 is a flow chart of a prior art semi-continuous cast slab hot rolling process for producing narrow coils of sheet material.
FIG. 3 is a flow chart of a prior art semi-continuous cast rod hot continuous rolling process for producing narrow coils of sheet material.
Fig. 4 is a flow chart of producing a metal laminated composite plate by rolling a narrow rolled plate in the prior art.
FIG. 5 is a flow chart of the production of metal laminated composite plates by rolling the T4P aluminum alloy narrow coil plate.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
As shown in figure 1, the invention provides a production process of a T4P-state aluminum alloy narrow coiled plate, which mainly comprises the production processes of aluminum alloy fast cooling continuous casting, continuous expanding extrusion, online water quenching treatment, coiling, pre-aging treatment and the like.
Wherein the cooling speed of the rapid cooling continuous casting is 200-350 ℃/s, preferably 250-300 ℃/s, and the round or approximately square aluminum alloy coiled rod blank with small diameter, namely the equivalent diameter of 20-40mm is obtained by casting. In the rapid cooling continuous casting process, the cooling speed is limited to 200-350 ℃/s, and experiments show that if the cooling speed is too high, the solidification in the casting process is too high, and the casting traction cannot be realized; on the contrary, the cooling speed is too slow, the casting process is solidified and not formed, the crystal grains are coarse, and the solid solubility does not meet the requirement.
Wherein, the continuous expansion extrusion is carried out by adopting an expansion die cavity, and the used continuous extruder is a 400-type, 550-type or 600-type single-wheel single-groove aluminum continuous extruder. Extruding the coiled rod blank with the small diameter (phi 20-40mm) into an aluminum alloy plate with a large section (the thickness is 4-30mm, and the width is 80-300mm) by expanding and continuous extrusion; controlling the temperature of an extrusion outlet of the expansion die cavity to be 400-540 ℃; the rotating speed of the extrusion wheel is 3-12 rpm.
In the continuous expansion extrusion process, the temperature of the outlet of the expansion die cavity needs to be controlled between 400 ℃ and 540 ℃; and experiments show that when the temperature of an extrusion outlet is lower than 400 ℃, the solid solubility of the aluminum alloy is insufficient, the subsequent aging effect is influenced, and when the temperature is higher than 540 ℃, the surface quality of the narrow coiled plate is poor and even microcracks appear.
The rotating speed of the extrusion wheel of the continuous extruder is 3-12 rpm. This is because, if the rotation speed is too low, the torque is too large, which causes the current overload of the main engine and the lock-up of the extruder, and if the rotation speed is too high, the temperature of the extrusion wheel surface is too high, and the aluminum layer of the extrusion wheel surface is broken, which causes leakage and affects the extrusion.
Wherein, the online water quenching treatment is that cooling water is arranged at the position of about 10-50mm, preferably 20-30mm, of the outlet of the extrusion expansion die cavity and is used for performing online water quenching on the extruded narrow coiled sheet, and the temperature of the narrow coiled sheet is ensured to be 50-100 ℃ after water quenching.
Because the outlet speed of the narrow coiled sheet is slower during continuous expansion extrusion, in order to ensure the quenching transfer time and the quenching effect, the narrow coiled sheet needs to be rapidly cooled when coming out from the outlet of the expansion die cavity. Therefore, cooling water is arranged at the position of about 10-50mm of the outlet of the expansion die cavity, thereby realizing the purpose of rapidly cooling and quenching the extrusion-molded narrow rolled plate. The distance from the cooling water to the outlet of the expansion die cavity cannot be too small, if the distance is less than 10mm, the cooling water enters the expansion die cavity easily to cause die cracking or die blocking due to die cooling, and if the distance is more than 50mm, the cooling quenching transfer time is too long, so that the quenching solid solution effect is difficult to ensure.
In addition, the temperature after water quenching and cooling cannot be too high, otherwise, rapid natural aging can be generated, the temperature cannot be too low, otherwise, the water vapor on the surface of the narrow rolled plate cannot be dried, and the problems of surface oxidation, color change, blackening and the like are easily caused.
The product is then wound up using constant tension. In actual production, the coiling can be carried out according to the weight or the length required by a user, and the length or the weight of a product is not limited by the process; compared with a large ingot casting-hot rolling process product, the method does not need to perform slitting and trimming treatment, and has higher yield. And (3) carrying out pre-aging treatment after rolling, wherein the general condition is that the temperature is kept at 105-140 ℃ for 1-4 hours. Pre-aging is to keep the temperature at a higher temperature for a period of time before natural aging is carried out to allow the supersaturated solid solution alloy to form enough and stable second phase cores. The treatment can effectively inhibit G.P zone separated by natural aging process, and prevent softening phenomenon of artificial aging.
Finally, the product with good solid solution effect, T4P state, and uniform whole roll plate structure and performance is prepared. The process designed by the invention is suitable for the development, development and production of 6-series and/or 2-series and/or 7-series high-performance aluminum alloy narrow coiled sheets.
The invention has the main technical characteristics that: 1. the rapid cooling and continuous casting of the aluminum alloy is followed by continuous expansion extrusion and water quenching treatment at an outlet, so that a T4P state product with good solid solution effect can be directly obtained, and the structure and the performance of the whole roll of plate are uniform; 2. compared with a large ingot casting-hot rolling process product, the narrow coiled plate material with the preset thickness and the preset width is directly manufactured through continuous expanding extrusion, so that slitting/trimming processing is not needed, the operation difficulty and the production cost caused by cutting or slitting the large coiled plate material are avoided, and the yield is effectively improved.
The T4P state aluminum alloy narrow coiled sheet product prepared by the invention is used in the process of rolling and producing metal laminated composite plates, does not need solution quenching treatment and surface cleaning treatment, can be directly subjected to whole aging treatment after rolling and compounding, solves the product quality problems of cracking, deformation, uneven performance and the like of the metal laminated composite material in the subsequent solution quenching treatment process, and is expected to provide a new solution for the development, development and production and application of 6-series and/or 2-series and/or 7-series high-performance aluminum alloy narrow coiled sheets.
The technical solution and effects of the present invention will be described below with reference to specific examples.
Example 1
The embodiment provides a production process of a T4P-state aluminum alloy narrow coiled plate, which is used for producing a 316 stainless steel/6013 aluminum alloy/316 stainless steel three-layer composite plate with a thickness ratio of 0.7/8.6/0.7 by hot rolling and compounding by a belt method, and the width of the composite plate is 160 mm. The 6013 aluminum alloy plate is a narrow-rolled plate with the thickness of 18mm and the width of 160 mm.
The production process of the narrow-coil plate comprises the following steps:
(1) quick cooling and continuous casting: the method comprises the steps of adopting 99.7% of aluminum ingots, instant Si and magnesium ingots, Al-Mn, Al-Cr and Al-Cu intermediate alloys, calculating the weight proportion of each alloy according to the chemical component range of 6013 aluminum alloy, mixing according to the proportion, melting, refining, preserving heat and filtering on line in a 5000Kg capacity gas smelting furnace, and continuously casting into a trapezoidal rod blank with the diameter equivalent of phi 20mm by adopting a wheel type continuous casting machine with the diameter of 1800 mm. The continuous casting temperature is controlled at 700-730 ℃, the casting speed is set to be 800mm/min, and the cooling speed is controlled to be about 320 ℃/s by controlling the length of the cooling section.
(2) Continuous expanding extrusion: and continuously expanding and extruding the narrow coiled sheet material with the thickness of 18mm and the width of 160mm on a 400-type aluminum material extruder by adopting an expansion die cavity, wherein the rotating speed of an extrusion wheel is 12rpm, and the temperature of an outlet is about 495 ℃.
(3) Online water quenching and cooling: and cooling water is sprayed to the narrow coiled sheet material at a position 20mm away from the outlet of the expanded die cavity by cooling water arranged on the end face of the die pad, and the narrow coiled sheet material is cooled to 90-100 ℃, and then the product is coiled by using constant tension.
(4) Pre-aging treatment: and (4) preserving the heat at the temperature of 115 ℃ for 3 hours to obtain the aluminum alloy narrow coiled sheet product in the T4P state.
Comparative example 1
Outsourcing a semicontinuous casting flat ingot, namely hot rolling 6013 aluminum alloy hot rolling coiled sheet with the thickness of 18mm and the width of 1800mm, and cutting into 10 narrow coiled sheets with the width of 160mm according to the needs. The basic production process of the externally purchased 6013 aluminum alloy hot-rolled coil plate comprises the following steps: homogenizing the cast ingot, heating the cast ingot, and hot rolling the wide coil plate.
Comparative example 2
The preparation process of the purchased narrow coil plate comprises the following steps: after homogenization, 6013 aluminum alloy with the diameter of 180mm is subjected to semicontinuous casting, heating and hot rolling to form a narrow coiled sheet with the thickness of 18mm and the width of 160mm by cutting edges.
Application example
The narrow coiled plate with the thickness of 18mm and the width of 160mm prepared in example 1 is directly hot-rolled and compounded with 316 stainless steel with the thickness of 0.7mm at 300 ℃ without surface cleaning to form a 0.7/8.6/0.7 316 stainless steel/6013 aluminum alloy/316 stainless steel three-layer composite plate. And then, carrying out artificial aging treatment on the composite board at 191 ℃ for 4h, and measuring the microhardness of the aluminum alloy layer, wherein the average microhardness can reach 131Hv, and the microhardness is far higher than the requirement of 120 Hv.
After the surfaces of the narrow rolled plates with the thickness of 18mm and the width of 160mm in the comparative examples 1-2 are cleaned, the narrow rolled plates and 316 stainless steel with the thickness of 0.7mm are hot-rolled and compounded at 300 ℃ to form the 0.7/8.6/0.7 316 stainless steel/6013 aluminum alloy/316 stainless steel three-layer composite plate. And then, the composite board is subjected to artificial aging treatment after heat preservation for 4 hours at 191 ℃, and the average microhardness of the aluminum alloy layer is only 98 Hv. If the three-layer composite board is prepared, the composite board is firstly subjected to heat preservation at 520 ℃ for 30min, then water quenching is carried out, and then the heat preservation at 191 ℃ is carried out for 4h, and then artificial aging treatment is carried out, the micro-hardness of the aluminum alloy layer can be measured, the average micro-hardness can reach 122Hv, and the requirement of not less than 120Hv can be met.
Comparative example 1 a process of purchasing 6013 aluminum alloy sheet material prepared by wide plate slitting and comparative example 2 round bar hot rolling slitting, the operation of slitting and trimming leads to higher geometric waste, so that the finished material is reduced, and when the process is used for producing metal laminated composite plates, a process of performing surface cleaning treatment on the metal laminated composite plates is also added; after the composite plate is manufactured by hot rolling, the hardness of the aluminum alloy layer of the composite plate can not meet the requirement after direct aging, the 6013 aluminum alloy narrow coil plate or the composite plate needs to be quenched firstly and then subjected to artificial aging treatment (such as the metal laminated composite plate preparation flow shown in fig. 4) to meet the relevant hardness requirement, but the quenching process is added in the mode, and in the quenching process, due to the fact that expansion coefficients of stainless steel and the aluminum alloy are not consistent, the cracking and layering phenomena of 20-30% are likely to occur in the quenching process.
On the contrary, in the process for preparing the metal laminated composite plate shown in fig. 5, the 6013 narrow roll aluminum alloy plate in the T4P state prepared by the process of the invention can be directly subjected to hot rolling compounding and artificial aging after compounding, the hardness of the plate is far higher than a required value, and the surface cleaning treatment of the narrow roll plate and the quenching treatment of the composite plate before compounding are also omitted, so that the yield of the aluminum alloy narrow roll plate and the yield of the composite plate are improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A production process of a T4P-state aluminum alloy narrow coiled sheet is characterized by comprising the following steps: fast cooling and continuous casting of aluminum alloy, continuous expansion and extrusion, online water quenching treatment, coiling and pre-aging treatment;
the cooling speed of the rapid cooling continuous casting is 200-;
when in continuous expansion extrusion, the aluminum alloy billet is continuously expanded and extruded into a narrow coiled sheet material with the thickness of 4-30mm and the width of 80-300mm through an expansion die cavity, and the temperature of an outlet of the expansion die cavity is controlled to be 400-540 ℃; and cooling water for performing online water quenching treatment on the narrow coiled sheet is arranged at a position 10-50mm away from the outlet of the expansion die cavity.
2. The process according to claim 1, wherein the continuous rapid cooling casting is a belt or caterpillar or horizontal continuous casting.
3. The production process as claimed in claim 1, wherein the cooling rate of the rapid cooling continuous casting is 250-300 ℃/s.
4. The production process of claim 1, wherein in the continuous expansion extrusion, a single-wheel single-groove aluminum continuous extruder of 400 type, 550 type or 600 type is used, and the extrusion is carried out by adopting an expansion die cavity.
5. The production process according to claim 4, wherein the rotation speed of the extrusion wheel of the continuous extruder is 3 to 12rpm in the continuous extrusion.
6. The production process according to claim 1, wherein the outlet distance of the cooling water from the expanded mold cavity is controlled to be 20-30 mm.
7. The production process according to claim 1, wherein the cooling water is sprayed to the surface of the narrow rolled plate from the expanded die cavity by a spraying device for quenching, and the temperature of the narrow rolled plate after quenching is controlled to be 50-100 ℃.
8. The production process according to claim 1, wherein the aluminum alloy narrow rolled sheet is a 6-series, 2-series or 7-series high-performance aluminum alloy narrow rolled sheet.
9. Use of the narrow coil sheet of the aluminum alloy in the T4P state prepared by the production process according to any one of claims 1-8 in the preparation of metal laminated composite plates by rolling and compounding.
10. The use according to claim 9, wherein the aging treatment is carried out directly after the rolling compounding to prepare the metal laminated composite plate.
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| JP2007247000A (en) * | 2006-03-16 | 2007-09-27 | Kobe Steel Ltd | Method for manufacturing aluminum alloy sheet having superior ridging-mark resistance in forming step |
| CN106906435A (en) * | 2015-12-22 | 2017-06-30 | 北京有色金属研究总院 | A kind of efficient preparation technology of Aluminum alloy for automotive body sheet material |
| US20200216938A1 (en) * | 2017-08-01 | 2020-07-09 | Aleris Aluminum Duffel Bvba | 6xxxx-series rolled sheet product with improved formability |
| CN112626429A (en) * | 2019-10-08 | 2021-04-09 | 有研工程技术研究院有限公司 | Method for improving aging resistance stability of 6000 series aluminum alloy plate |
| CN111644476A (en) * | 2020-05-22 | 2020-09-11 | 湖南乾龙新材料有限公司 | Production process method of large coil weight Al-Mg-Si series alloy extruded material |
| CN112570991A (en) * | 2020-11-10 | 2021-03-30 | 湖南乾龙新材料有限公司 | Production method of high-strength high-conductivity aluminum alloy conductor rail section bar |
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