CN113399490B - Preparation process of high-strength aluminum plate strip - Google Patents
Preparation process of high-strength aluminum plate strip Download PDFInfo
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- CN113399490B CN113399490B CN202110454911.1A CN202110454911A CN113399490B CN 113399490 B CN113399490 B CN 113399490B CN 202110454911 A CN202110454911 A CN 202110454911A CN 113399490 B CN113399490 B CN 113399490B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
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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
- B22D11/14—Plants for continuous casting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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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
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/047—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 of alloys with magnesium as the next major constituent
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Abstract
The invention belongs to the technical field of aluminum alloy plates, and particularly relates to a preparation process of a high-strength aluminum plate strip, which comprises the following raw materials: 0.07-0.08 percent of Si, 0.01-0.02 percent of Cu, 0.45-0.55 percent of Mn, 0.015-0.02 percent of Cr, 0.02-0.05 percent of La0, 4.1-4.3 percent of Mg4, 10-12 percent of Fe, and the balance of aluminum; the method comprises the steps of manufacturing an iron alloy material independent of an aluminum plate strip, preparing a rough wire rod from the iron alloy doped with rare earth element lanthanum by using a continuous directional solidification technology, rolling and drawing the rough wire rod to obtain a refined steel wire, combining the refined steel wire with an aluminum alloy solution, and directionally arranging the refined steel wire in the middle of the aluminum plate strip, so that the impact strength and the tensile strength of the manufactured aluminum plate strip are effectively enhanced by utilizing the toughness of the steel wire.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy plates, and particularly relates to a preparation process of a high-strength aluminum plate strip.
Background
In the prior art, the preparation requirement on the aluminum plate strip in the market is high, the requirement on high tensile strength is high, the requirement on large extrusion stress and shear stress can be met, the wear resistance is good, and the toughness is high.
A high-toughness aluminum plate strip for a new energy automobile and a production method thereof are published in Chinese patent application numbers: CN2017107541736, the high-toughness aluminum plate strip for the new energy automobile comprises the following components: 0.01 to 0.08 percent of Si, 0.06 to 0.12 percent of Fe0.001 to 0.02 percent of Cu0.45 to 0.5 percent of Mn0.1 to 4.3 percent of Mg4, 0.005 to 0.02 percent of Cr0, 0.002 to 0.005 percent of La0, 0.002 to 0.005 percent of Ce0, 0.01 to 0.018 percent of Ti0, and the balance of Al. The production method comprises the steps of smelting, casting, face milling, soaking, heating, hot rough rolling, hot finish rolling, cold rolling, annealing, finishing and the like, the method modifies the performance of the aluminum plate strip by changing the material of the aluminum plate strip, but the rare earth elements are easy to have the phenomenon of uneven distribution in the process of adding the rare earth elements into aluminum alloy liquid, so that the effect of improving the performance of the aluminum plate strip by changing the components is not obvious enough.
In view of the above, the invention provides a preparation process of a high-strength aluminum plate strip, which is used for solving the technical problems.
Disclosure of Invention
The invention provides a preparation process of a high-strength aluminum plate strip, which aims to make up for the defects of the prior art and solve the problems that the alloy strip produced in a composite mode in the prior art is uneven in upper and lower structures, thick in product crystalline structure, influences product quality and is low in yield of the prepared aluminum plate strip.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a preparation process of a high-strength aluminum plate strip, which comprises the following raw materials:
0.07-0.08 percent of Si, 0.01-0.02 percent of Cu, 0.45-0.55 percent of Mn, 0.015-0.02 percent of Cr, 0.02-0.05 percent of La0, 4.1-4.3 percent of Mg4, 10-12 percent of Fe, and the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
s1: proportioning the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at 1800-2200 ℃, and introducing a smelting solution into a crystallizer after the alloy materials are completely hot-melted and are continuously stirred for 0.5-1H in a heat preservation manner;
s2: controlling the temperature in the crystallizer to be 750-900 ℃, the cooling temperature to be 20-30 ℃, the blank ejection speed to be 5-8mm/s, adopting a hole pattern casting mold outlet to carry out continuous directional solidification casting, and controlling the diameter of the hole pattern casting mold outlet to be 15-20mm to prepare a rough wire rod;
s3: heating the rough wire rod to 800 ℃ and then introducing the heated rough wire rod into a hot rolling mill, controlling the hot rolling mill to continuously carry out hot rolling for 5-8 times, rolling the rough wire rod into a refined wire rod with the thickness of 5-6mm, introducing the refined wire rod into an annealing furnace to carry out annealing treatment at 500 ℃ and 450 ℃, and introducing the annealed wire rod into a metal wire drawing machine;
s4: controlling the wire drawing rate of a metal wire drawing machine to be 6-8m/s, drawing the refined wire rod into a rough steel wire with the thickness of 1.5-2.4mm, introducing the rough steel wire into the wire drawing machine again, controlling the wire drawing machine to be 3-4m/s, and drawing the rough steel wire into a refined steel wire with the thickness of 0.15-0.25 mm;
s5: arranging the refined steel wires in the middle layer of the die in an oriented manner, introducing the alloy material of the high-strength aluminum plate strip raw material with iron and lanthanum removed into a smelting furnace, refining, slagging off, standing, degassing and then pouring into the die at the temperature of 680-plus 700 ℃ to obtain an aluminum plate, naturally cooling, and then carrying out 5-8 times of hot finish rolling and cold rolling to obtain the high-strength aluminum plate strip with the thickness of 2-2.5 mm;
in the prior art, the aluminum strip is high in preparation requirement on the market, high in tensile strength, high in extrusion stress and shearing stress, good in wear resistance and high in toughness, but most of the aluminum strips are forged, cast or tailor-welded by using traditional high-strength single metal materials at present, and the use requirements of light weight, high strength and long service life cannot be met by only using aluminum alloy or high-strength steel, but the alloy strips produced in a composite mode in the prior art have the defects of uneven upper and lower tissues, thick and thick product crystalline tissues, influence on product quality and low yield of the prepared aluminum strips;
when the invention works, the ferroalloy material is manufactured independently of the aluminum plate strip, firstly, the ferroalloy doped with the rare earth element lanthanum is prepared into a rough wire rod by using the continuous directional solidification technology, then the rough wire rod is rolled and drawn to prepare a refined steel wire, and the refined steel wire is combined with the aluminum alloy solution to ensure that the refined steel wire is directionally arranged in the middle of the aluminum plate strip, thereby effectively enhancing the impact strength and the tensile strength of the prepared aluminum plate strip by utilizing the toughness of the steel wire, the solid-liquid section protruded by the continuous directional solidification technology in the casting process is beneficial to the gas separated out in the solidification process and the included continuous discharge liquid not to be involved in the wire rod, further leading the prepared rough wire rod to have compact structure, no air holes and shrinkage cavity casting defects, and simultaneously, the protruded solid-liquid section is beneficial to the competitive growth of crystals in the seeding stage, be convenient for realize the evolution of single crystal structure, and with steel wire preparation shaping back with aluminium alloy liquid pouring combine, compare in ferroalloy and aluminium alloy mixed casting can also effectually avoid the alloy material in iron element and aluminium alloy element combine inhomogeneously, and then lead to producing that the crystal structure is thick, the product density is lower, and then lead to product intensity inhomogeneous, the aluminum plate area yield that leads to making reduces and finished product intensity descends, surface smoothness degree reduces.
Preferably, the refined steel wires in S5 are twisted before being arranged in the die, the number of the twisted steel wires is controlled to five, and the steel wires are twisted into a spiral steel wire rope with the diameter of 0.6-0.7 mm;
the during operation, single steel wire intensity is lower, and at the in-process of load-carrying, its bearing capacity of the compound wire rope of making of many steel wires is stronger, and toughness is higher and its bendable degree is higher, and the pliability is strong, and effectual messenger wire rope is in the conductivity of the internal part counter force of aluminum plate area, and then makes the aluminum plate area that makes possess the dispersion effect of stronger power, and then strengthen the breaking strength of aluminum plate area.
Preferably, the steel wire rope is continuously added with connecting steel wires in the twisting process; the connecting steel wire is a steel wire section which is cut into 12-15 mm; the connecting steel wires are twisted into the inner part of the steel wire rope and are distributed in a ratio of 1:1 on the outer part of the steel wire rope; the gap between the connecting steel wire and the steel wire rope is 3-5 mm; the arrangement gap of the steel wire ropes in the die is 8-10 mm;
when the aluminum alloy steel wire rope is in work, the connecting steel wires are continuously added in the twisting process of the steel wire rope, the ratio of the connecting steel wires to the inside and the outside of the steel wire rope is 1:1, so that the connecting steel wires are stably combined with the steel wire rope and extend outwards, in the pouring process of aluminum alloy liquid, the connecting steel wires uniformly distributed on the surface of the steel wire rope enable the stress area of the steel wire rope to be increased and the combination area of the steel wire rope and an aluminum plate belt to be increased, the force dispersion effect of the steel wire rope is better when the steel wire rope is stressed, the length of the connecting steel wires between every two adjacent steel wire ropes is larger than the distance between the steel wire ropes, so that the steel wire ropes uniformly and directionally arranged in the aluminum plate belt are mutually contacted through the connecting steel wires, the integrity of the steel wire rope is stronger when the force is transmitted, the force is more convenient to transmit, and the tensile strength of the manufactured aluminum plate belt is effectively enhanced;
preferably, after the twisting of the steel wire ropes is finished, the steel wire ropes are led into the hot press, a magnetic field perpendicular to the axis is applied to the steel wire ropes, and hot pressing is carried out at the temperature of 450-500 ℃, so that the steel wire ropes connected to the surface of the steel wire ropes are uniformly distributed on the two sides of the steel wire ropes; after the steel wire rope is introduced into the die, applying an alternating magnetic field in the die, controlling the frequency of the alternating magnetic field to be 10-15kHZ, and controlling the heating time to be 6-8S;
when the device works, the paramagnetic connecting steel wires are uniformly arranged under the action of the magnetic field through the erection of the magnetic field, the connecting steel wires and the steel wire ropes are heated under the hot pressing action of a hot press, and then the connecting steel wires on the surfaces of the steel wire ropes are shaped under the action of pressure and temperature, on one hand, the steel wire ropes are more convenient to be connected with each other in directional arrangement, on the other hand, the elasticity of the steel wires is reduced after the steel wires are heated and shaped, so that the connecting steel wires are prevented from being impacted by aluminum alloy liquid in the subsequent pouring process of the aluminum alloy liquid, the connecting steel wires are gathered, the connecting steel wires are not uniformly distributed and cannot effectively play a role in force dispersion, and meanwhile, the steel wires on the surfaces of the steel wire ropes are heated and melted in a short time by using an alternating magnetic field, so that the connecting steel wires on two adjacent steel wire ropes are connected with each other, and the force conduction effect between the steel wire ropes is enhanced, the integrity of the aluminum plate strip is enhanced, and the strength of the aluminum plate strip is further enhanced.
Preferably, the steel wire ropes in S5 are directionally arranged and then directly enter an aluminum alloy solution in a casting and rolling machine under the traction of a traction roller, the aluminum alloy solution is dragged to be the same as the gap between two rotary casting and rolling rollers to finish solidification and hot rolling, the casting and rolling time is controlled to be 3-5S, a steel plate strip with the thickness of 2.5-3mm is directly generated, and the cast and rolled steel plate strip is subjected to cold rolling for 5-8 times to prepare a high-strength aluminum plate strip with the thickness of 2-2.5 mm;
during operation, through using the casting and rolling technology, solidification and hot rolling of aluminum alloy liquid are carried out in succession in the short time, simultaneously at the in-process of casting and rolling, utilize carry over pinch rolls to pull wire rope, and then make aluminum alloy liquid and wire rope combine more even, solidify, hot rolling is carried out in succession and can effectually shorten the preparation time of aluminum plate area on the one hand, accelerate the preparation efficiency of aluminum plate area, can also avoid making wire rope produce deformation, bending in aluminum plate area inside in continuous hot rolling technology simultaneously, and then make and lead to wire rope not in the state of stretching straight, lead to wire rope's load effect to reduce, and then lead to the reinforcing effect to the intensity of aluminum plate area to reduce.
Preferably, the connecting steel wire is introduced into a constant magnetic field for magnetization treatment before twisting, so that the connecting steel wire has weak magnetism; the weak attraction force between two adjacent connecting steel wires is smaller than the elasticity of the connecting steel wires;
the during operation is through carrying out the magnetization processing with connecting the steel wire, and then makes connecting the steel wire possess weak magnetism, and at the in-process that connecting the steel wire and twist into the wire rope, connecting the steel wire in the effectual reinforcing of wire rope's combination, and then make connecting the steel wire and more conveniently twist into the wire rope, weak magnetic force simultaneously still makes when wire rope directional arrangement, and connecting the steel wire and possess the inter attraction, under alternating magnetic field induction heating's effect, makes and more conveniently contacts each other between the connecting the steel wire.
The invention has the following beneficial effects:
1. the invention relates to a preparation process of a high-strength aluminum plate strip, which is characterized in that an iron alloy material is manufactured independently of an aluminum plate strip, firstly, a rough wire rod is prepared from an iron alloy doped with a rare earth element lanthanum by using a continuous directional solidification technology, then, a refined steel wire is prepared from the rough wire rod through rolling and wire drawing, and the refined steel wire is combined with an aluminum alloy solution, so that the refined steel wire is directionally arranged in the middle of the aluminum plate strip, and the impact resistance and the tensile strength of the prepared aluminum plate strip are effectively enhanced by utilizing the toughness of the steel wire.
2. According to the preparation process of the high-strength aluminum plate strip, the solidification and hot rolling of the aluminum alloy liquid are continuously carried out in a short time by using the casting and rolling process, meanwhile, the steel wire rope is pulled by using the traction roller in the casting and rolling process, so that the aluminum alloy liquid and the steel wire rope are combined more uniformly, the solidification and hot rolling are continuously carried out, the preparation time of the aluminum plate strip can be effectively shortened, the preparation efficiency of the aluminum plate strip is accelerated, and the steel wire rope is prevented from deforming and bending in the aluminum plate strip in the continuous hot rolling process.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
Detailed Description
The present invention will be further described with reference to the following detailed description so that the technical means, the creation features, the achievement purposes and the effects of the present invention can be easily understood.
As shown in fig. 1, the high-strength aluminum plate strip manufacturing process provided by the invention comprises the following raw materials:
0.07-0.08 percent of Si, 0.01-0.02 percent of Cu, 0.45-0.55 percent of Mn, 0.015-0.02 percent of Cr, 0.02-0.05 percent of La0, 4.1-4.3 percent of Mg4, 10-12 percent of Fe, and the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
s1: proportioning the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at 1800-2200 ℃, and introducing a smelting solution into a crystallizer after the alloy materials are completely hot-melted and are continuously stirred for 0.5-1H in a heat preservation manner;
s2: controlling the temperature in the crystallizer at 750-900 ℃, the cooling temperature at 20-30 ℃, the blank discharging speed at 5-8mm/s, adopting a hole-shaped casting mold outlet to carry out continuous directional solidification casting, and controlling the diameter of the hole-shaped casting mold outlet at 15-20mm to prepare a rough wire rod;
s3: heating the rough wire rod to 800 ℃ and then introducing the heated rough wire rod into a hot rolling mill, controlling the hot rolling mill to continuously carry out hot rolling for 5-8 times, rolling the rough wire rod into a refined wire rod with the thickness of 5-6mm, introducing the refined wire rod into an annealing furnace to carry out annealing treatment at 500 ℃ and 450 ℃, and introducing the annealed wire rod into a metal wire drawing machine;
s4: controlling the wire drawing rate of a metal wire drawing machine to be 6-8m/s, drawing the refined wire rod into a rough steel wire with the thickness of 1.5-2.4mm, introducing the rough steel wire into the wire drawing machine again, controlling the wire drawing machine to be 3-4m/s, and drawing the rough steel wire into a refined steel wire with the thickness of 0.15-0.25 mm;
s5: arranging the refined steel wires in the middle layer of the die in an oriented manner, introducing the alloy material of the high-strength aluminum plate strip raw material with iron and lanthanum removed into a smelting furnace, refining, slagging off, standing, degassing and then pouring into the die at the temperature of 680-plus 700 ℃ to obtain an aluminum plate, naturally cooling, and then carrying out 5-8 times of hot finish rolling and cold rolling to obtain the high-strength aluminum plate strip with the thickness of 2-2.5 mm;
in the prior art, the market has high preparation requirements on the aluminum plate strip, not only requires high tensile strength, but also requires that the aluminum plate strip can bear larger extrusion stress and shearing stress, and has good wear resistance and high toughness, but most of the aluminum plate strip still adopts the traditional high-strength single metal material for forging, casting or tailor-welding processing at present, and the use requirements of light weight, high strength and long service life cannot be simultaneously met by only adopting aluminum alloy or high-strength steel, but the alloy strip produced by compounding in the prior art has uneven upper and lower tissues, thick product crystalline tissues, influences the product quality and has low yield of the prepared aluminum plate strip;
when the invention works, the ferroalloy material is manufactured independently of the aluminum plate strip, firstly, the ferroalloy doped with the rare earth element lanthanum is prepared into a rough wire rod by using a continuous directional solidification technology, then the rough wire rod is rolled and drawn to prepare a refined steel wire, and the refined steel wire is combined with an aluminum alloy solution to ensure that the refined steel wire is directionally arranged in the middle of the aluminum plate strip, so the impact strength and the tensile strength of the prepared aluminum plate strip are effectively enhanced by utilizing the toughness of the steel wire, the solid-liquid section projected by the continuous directional solidification technology in the casting process is beneficial to gas separated out in the solidification process and the mixed liquid to be continuously discharged into the wire rod without being involved, further the prepared rough wire rod has compact structure, no air holes and shrinkage cavity casting defects, and simultaneously, the projected solid-liquid section is beneficial to the competitive growth of crystals in the seeding stage, be convenient for realize the evolution of single crystal structure, and with steel wire preparation shaping back with aluminium alloy liquid pouring combine, compare in ferroalloy and aluminium alloy mixed casting can also effectually avoid the alloy material in iron element and aluminium alloy element combine inhomogeneously, and then lead to producing that the crystal structure is thick, the product density is lower, and then lead to product intensity inhomogeneous, the aluminum plate area yield that leads to making reduces and finished product intensity descends, surface smoothness degree reduces.
In an embodiment of the present invention, the refined steel wires in S5 are twisted before being arranged in the die, the number of the twisted steel wires is controlled to five, and the refined steel wires are twisted into a spiral steel wire rope with a diameter of 0.6-0.7 mm;
during operation, single steel wire intensity is lower, and at the in-process of load, its bearing capacity of the steel wire rope that many steel wires are compound to be made is stronger, toughness is higher and its flexible degree is higher, and the pliability is strong, and effectual messenger's steel wire rope is in the conductibility of aluminum plate strip internal counter-force, and then makes the aluminum plate strip that makes possess the dispersion effect of stronger power, and then strengthen the breaking strength of aluminum plate strip.
As an embodiment of the present invention, the steel wire rope is continuously added with connecting steel wires during the twisting process; the connecting steel wire is a steel wire section which is cut into 12-15 mm; the connecting steel wires are twisted into the inner part of the steel wire rope and are distributed in a ratio of 1:1 on the outer part of the steel wire rope; the gap of the connecting steel wire in the steel wire rope is 3-5 mm; the arrangement gap of the steel wire ropes in the die is 8-10 mm;
during working, the connecting steel wires are continuously added in the twisting process of the steel wire rope, the ratio of the connecting steel wires to the inside and the outside of the steel wire rope is 1:1, so that the connecting steel wires and the steel wire rope are stably combined and extend outwards, in the pouring process of aluminum alloy liquid, the connecting steel wires uniformly distributed on the surface of the steel wire rope enable the stress area of the steel wire rope to be increased and the combination area of the steel wire rope and an aluminum plate belt to be increased, the force dispersion effect of the steel wire rope is better when the steel wire rope is stressed, the length of the connecting steel wire between every two adjacent steel wire ropes is larger than the distance between the steel wire ropes, so that the steel wire ropes uniformly and directionally arranged are mutually contacted through the connecting steel wires in the aluminum plate belt, the integrity of the steel wire rope is stronger when the force is transmitted, the force is more convenient to be transmitted, and the tensile strength of the manufactured aluminum plate belt is effectively enhanced;
as an implementation mode of the invention, a plurality of steel wire ropes are twisted and then are led into the hot press, a magnetic field vertical to the axis is applied to the steel wires, and hot pressing is carried out at the temperature of 450-500 ℃, so that the steel wire ropes connected with the steel wires on the surface of the steel wire ropes are uniformly distributed on the two sides of the steel wire ropes; after the steel wire rope is introduced into the die, applying an alternating magnetic field in the die, controlling the frequency of the alternating magnetic field to be 10-15kHZ, and controlling the heating time to be 6-8S;
when the device works, the paramagnetic connecting steel wires are uniformly arranged under the action of the magnetic field through the erection of the magnetic field, the connecting steel wires and the steel wire ropes are heated under the hot pressing action of a hot press, and then the connecting steel wires on the surfaces of the steel wire ropes are shaped under the action of pressure and temperature, on one hand, the steel wire ropes are more convenient to be connected with each other in directional arrangement, on the other hand, the elasticity of the steel wires is reduced after the steel wires are heated and shaped, so that the connecting steel wires are prevented from being impacted by aluminum alloy liquid in the subsequent pouring process of the aluminum alloy liquid, the connecting steel wires are gathered, the connecting steel wires are not uniformly distributed and cannot effectively play a role in force dispersion, and meanwhile, the steel wires on the surfaces of the steel wire ropes are heated and melted in a short time by using an alternating magnetic field, so that the connecting steel wires on two adjacent steel wire ropes are connected with each other, and the force conduction effect between the steel wire ropes is enhanced, the integrity of the aluminum plate strip is enhanced, and the strength of the aluminum plate strip is further enhanced.
In an embodiment of the invention, after being directionally arranged, the steel wire ropes in the step S5 are directly fed into an aluminum alloy solution in a casting and rolling machine under the traction of a traction roller, the aluminum alloy solution is pulled to be used as a clearance between two rotary casting and rolling rollers to finish solidification and hot rolling, the casting and rolling time is controlled to be 3-5S, a steel plate strip with the thickness of 2.5-3mm is directly generated, and the cast and rolled steel plate strip is subjected to cold rolling for 5-8 times to prepare a high-strength aluminum plate strip with the thickness of 2-2.5 mm;
during operation, through using the casting and rolling technology, solidification and hot rolling of aluminum alloy liquid are carried out in succession in the short time, simultaneously at the in-process of casting and rolling, utilize carry over pinch rolls to pull wire rope, and then make aluminum alloy liquid and wire rope combine more even, solidify, hot rolling is carried out in succession and can effectually shorten the preparation time of aluminum plate area on the one hand, accelerate the preparation efficiency of aluminum plate area, can also avoid making wire rope produce deformation, bending in aluminum plate area inside in continuous hot rolling technology simultaneously, and then make and lead to wire rope not in the state of stretching straight, lead to wire rope's load effect to reduce, and then lead to the reinforcing effect to the intensity of aluminum plate area to reduce.
As an embodiment of the invention, the connecting steel wire is firstly introduced into a constant magnetic field for magnetization treatment before twisting, so that the connecting steel wire has weak magnetism; the weak attraction force between two adjacent connecting steel wires is smaller than the elasticity of the connecting steel wires;
during operation, through will connecting the steel wire and carry out the magnetization processing, and then make the steel wire of connecting possess faint magnetism, at the in-process that the steel wire of connecting twines to wire rope in, the effectual reinforcing of combination of connecting the steel wire in wire rope, and then make the steel wire of connecting more conveniently twine to wire rope in, weak magnetic force simultaneously still makes wire rope directional arrangement, and the steel wire of connecting possesses the inter attraction, under alternating magnetic field induction heating's effect, makes to connect and makes things convenient for the inter contact between the steel wire more.
The specific implementation flow is as follows:
when the continuous directional solidification casting process is used, the ferroalloy material is manufactured independently of the aluminum plate strip, firstly, the ferroalloy doped with the rare earth element lanthanum is prepared into a rough wire rod by using a continuous directional solidification technology, then, the rough wire rod is rolled and drawn to prepare a refined steel wire, the refined steel wire is combined with an aluminum alloy solution to ensure that the refined steel wire is directionally arranged in the middle of the aluminum plate strip, and further, the impact strength and the tensile strength of the prepared aluminum plate strip are effectively enhanced by utilizing the toughness of the steel wire, the solid-liquid section projected by the continuous directional solidification technology in the casting process is beneficial to gas separated out in the solidification process and mixed liquid to be continuously discharged into the wire rod, so that the prepared rough wire rod has compact structure, no air holes and shrinkage cavity casting defects, and simultaneously, the projected solid-liquid section is beneficial to the competitive growth of crystals in the seeding stage, be convenient for realize the evolution of single crystal structure, and with steel wire preparation shaping back with aluminium alloy liquid pouring combine, compare in ferroalloy and aluminium alloy mixed casting can also effectually avoid iron element and aluminium element to combine inhomogeneous in the alloy material, and then lead to producing that the crystalline texture is thick, the product density is lower, and then lead to product intensity inhomogeneous, cause the aluminum plate area yield that makes to reduce and finished product intensity descends, the smooth degree in surface to reduce.
In order to verify the impact strength of the aluminum plate strip prepared by the invention, a plurality of groups of experiments are specially set up;
example 1
The high-strength aluminum plate strip comprises the following raw materials:
0.08 percent of Si, 0.02 percent of Cu0.02 percent of Mn, 0.55 percent of Cr0.02 percent of La, 4.3 percent of Mg4, 78 percent of Fe12 percent of the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
preparing materials according to the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at 1800-plus 2000 ℃, continuously preserving heat and stirring for 0.5H after the alloy materials are completely hot-melted, cooling a smelting solution to 750-plus 800 ℃, introducing the alloy materials of the high-strength aluminum plate strip raw materials, which are removed of the iron element and the lanthanum element, into the smelting furnace, casting the alloy materials into a mold after refining, slagging off and standing degassing to obtain an aluminum plate, naturally cooling, performing 8 times of hot finish rolling and cold rolling to obtain the high-strength aluminum plate strip with the thickness of 2mm, repeating the steps to obtain five aluminum plate strips, and sequentially marking the aluminum plate strips as A1 to A5;
cutting the five prepared high-strength aluminum plate strips into 50 x 30cm long strips, introducing the strips into a shear strength testing machine, stretching the aluminum plate strips to detect the tensile strength, the non-proportional extension length and the elongation after fracture of the aluminum plate strips, and recording and outputting a table after the test is finished;
TABLE 1
Example 2
The high-strength aluminum plate strip comprises the following raw materials:
0.08 percent of Si, 0.02 percent of Cu0.02 percent of Mn, 0.55 percent of Cr0.02 percent of La, 4.3 percent of Mg4, 78 percent of Fe12 percent of the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
proportioning the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at the temperature of 1800-2200 ℃, continuously preserving heat and stirring for 0.5-1H after the alloy materials are completely hot-melted, introducing a smelting liquid into a crystallizer, controlling the temperature in the crystallizer at 900 ℃ and the cooling temperature at 20-30 ℃, controlling the blank discharging speed at 5-8mm/s, adopting a hole pattern casting outlet for continuous directional solidification casting, controlling the diameter of the hole pattern casting outlet at 15-20mm to obtain a rough wire rod, heating the rough wire rod to 800 ℃ and introducing the rough wire rod into a hot rolling mill, controlling the hot rolling mill to continuously carry out hot rolling for 5-8 times, rolling the rough wire rod into a refined wire rod with the diameter of 5-6mm, introducing the refined wire rod into an annealing furnace for annealing treatment at the temperature of 450-500 ℃, annealing, introducing into a metal wire drawing machine, controlling the wire drawing rate of the metal wire drawing machine to be 6-8m/s, drawing a refined wire rod into a rough steel wire with the thickness of 1.5-2.4mm, introducing the rough steel wire into the wire drawing machine again, controlling the wire drawing machine to be 3-4m/s, drawing the rough steel wire into a refined steel wire with the thickness of 0.15-0.25mm, directionally arranging the refined steel wire in the middle layer of a die, introducing the alloy material of which the iron element and the lanthanum element are removed from the high-strength aluminum plate strip raw material into a smelting furnace, refining, slagging off, standing, degassing at the temperature of 680-700 ℃, pouring into the die to obtain an aluminum plate, naturally cooling, performing 8 times of hot finish rolling and cold rolling to obtain a high-strength aluminum plate strip with the thickness of 2mm, repeating the steps to obtain five aluminum plate strips, and sequentially marking the five aluminum plate strips as B1 to B5;
cutting the five prepared high-strength aluminum plate strips into strips of 50 x 30cm, introducing the strips into a shear strength testing machine, stretching the aluminum plate strips to detect the tensile strength, the non-proportional extension length and the elongation after fracture of the aluminum plate strips, and recording and outputting a table after the test is finished;
TABLE 2
Example 3
The high-strength aluminum plate strip comprises the following raw materials:
0.08 percent of Si, 0.02 percent of Cu0.02 percent of Mn, 0.55 percent of Cr0.02 percent of Cr, 0.05 percent of La0, 4.3 percent of Mg4, 78 percent of Fe12 percent of the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
proportioning the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at the temperature of 1800-180 ℃, continuously preserving heat and stirring for 0.5H after the alloy materials are completely hot-melted, introducing the smelting liquid into a crystallizer, controlling the temperature in the crystallizer to be 750-900 ℃, the cooling temperature to be 20-30 ℃ and the blank discharging rate to be 5-8mm/s, adopting a hole-shaped casting mold outlet for continuous directional solidification casting, controlling the diameter of the hole-shaped casting mold outlet to be 15-20mm, preparing a rough wire rod, heating the rough wire rod to the temperature of 500-800 ℃, introducing the rough wire rod into a hot rolling mill, controlling the hot rolling mill to continuously perform hot rolling for 5-8 times, forming the rough wire rod into a refined wire rod with the thickness of 5-6mm, introducing the refined wire rod into an annealing furnace for annealing treatment at the temperature of 450-500 ℃, introducing the refined wire rod into a metal wire drawing machine after annealing treatment, controlling the wire drawing rate of a metal wire drawing machine to be 6-8m/s, drawing a refined wire rod into a rough steel wire with the diameter of 1.5-2.4mm, introducing the rough steel wire into the wire drawing machine again, controlling the wire drawing machine to be 3-4m/s, drawing the rough steel wire into a refined steel wire with the diameter of 0.15-0.25mm, twisting the refined steel wire into a spiral steel wire rope with the diameter of 0.6-0.7mm, continuously adding a connecting steel wire in the twisting process, introducing into a hot press after twisting, applying a magnetic field vertical to an axis to the steel wire, carrying out hot pressing at 300-500 ℃, carrying out induction heating by an alternating magnetic field, introducing the alloy material with iron and lanthanum removed from the high-strength aluminum plate strip raw material into a smelting furnace, refining, slagging off, standing and degassing at 680-700 ℃, directionally arranging the steel wire rope, and directly introducing the steel wire into an aluminum alloy solution under the traction of a traction roller, drawing an aluminum alloy solution to be used in a gap between two rotary casting rollers to finish solidification and hot rolling, controlling the casting and rolling time to be 3-5S, directly generating a 2.5-3mm steel plate strip, carrying out cold rolling on the cast and rolled steel plate strip for 5-8 times to prepare a high-strength aluminum plate strip with the thickness of 2-2.5mm, repeating the steps to prepare five aluminum plate strips, and sequentially marking as C1-C5;
cutting the five prepared high-strength aluminum plate strips into strips of 50 x 30cm, introducing the strips into a shear strength testing machine, stretching the aluminum plate strips to detect the tensile strength, the non-proportional extension length and the elongation after fracture of the aluminum plate strips, and recording and outputting a table after the test is finished;
TABLE 3
As a result of analysis of the above three sets of experimental structures, it was found that the aluminum sheet strip prepared by the prior art in example 1 was compared with examples 2 and 3 during the test, because the distribution of the alloy elements in the aluminum plate strip is not uniform, the manufactured aluminum plate strip not only has lower values of tensile strength and non-proportional elongation strength, but also the performance stability of the manufactured aluminum plate strip is poorer, the parameter difference of the aluminum plate strip manufactured by the same preparation process is larger, meanwhile, by comparing the embodiment 2 with the embodiment 3, after the steel wire rope is completely modified by using the preparation method of the invention, compared with the method that the steel wires are directly and uniformly distributed at the inner part of the aluminum plate strip, the method can effectively enhance the performance of the steel wires on the inner part of the aluminum plate strip to be improved, and then effectively improving the performance of the aluminum plate strip by a large margin, and effectively improving the tensile strength of the manufactured aluminum plate strip.
The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A preparation process of a high-strength aluminum plate strip is characterized by comprising the following steps: the high-strength aluminum plate strip comprises the following raw materials:
0.07-0.08 percent of Si, 0.01-0.02 percent of Cu0.45-0.55 percent of Mn, 0.015-0.02 percent of Cr0.02 percent of La, 4.1-4.3 percent of Mg4, 78-12 percent of Fe10 and the balance of aluminum;
the preparation process of the high-strength aluminum plate strip comprises the following steps:
s1: preparing materials according to the raw materials of the high-strength aluminum plate strip, introducing alloy materials of iron element and lanthanum element into a smelting furnace for high-temperature smelting at 1800-2200 ℃, and introducing a smelting solution into a crystallizer after the alloy materials are completely hot-melted and are continuously stirred for 0.5-1H in a heat preservation manner;
s2: controlling the temperature in the crystallizer at 750-900 ℃, the cooling temperature at 20-30 ℃, the blank discharging speed at 5-8mm/s, adopting a hole-shaped casting mold outlet to carry out continuous directional solidification casting, and controlling the diameter of the hole-shaped casting mold outlet at 15-20mm to prepare a rough wire rod;
s3: heating the rough wire rod to 800 ℃ and then introducing the heated rough wire rod into a hot rolling mill, controlling the hot rolling mill to continuously carry out hot rolling for 5-8 times, rolling the rough wire rod into a refined wire rod with the thickness of 5-6mm, introducing the refined wire rod into an annealing furnace to carry out annealing treatment at 500 ℃ and 450 ℃, and introducing the annealed wire rod into a metal wire drawing machine;
s4: controlling the wire drawing rate of a metal wire drawing machine to be 6-8m/s, drawing the refined wire rod into a rough steel wire with the thickness of 1.5-2.4mm, introducing the rough steel wire into the wire drawing machine again, controlling the wire drawing machine rate to be 3-4m/s, and drawing the rough steel wire into a refined steel wire with the thickness of 0.15-0.25 mm;
s5: arranging the refined steel wires in the middle layer of the die in an oriented manner, introducing the alloy material of the high-strength aluminum plate strip raw material with iron and lanthanum removed into a smelting furnace, refining, slagging off, standing, degassing and then pouring into the die at the temperature of 680-plus 700 ℃ to obtain an aluminum plate, naturally cooling, and then carrying out hot finish rolling and cold rolling for 5-8 times to obtain the high-strength aluminum plate strip with the thickness of 2-2.5 mm;
the refined steel wires in the S5 are twisted before being arranged in the die, the number of the twisted steel wires is controlled to be five, and the refined steel wires are twisted into a spiral steel wire rope with the diameter of 0.6-0.7 mm;
the steel wire rope is continuously added with connecting steel wires in the twisting process; the connecting steel wire is a steel wire section which is cut into 12-15 mm; the connecting steel wires are twisted into the inner part of the steel wire rope and are distributed in a ratio of 1:1 on the outer part of the steel wire rope; the gap between the connecting steel wire and the steel wire rope is 3-5 mm; the arrangement gap of the steel wire ropes in the die is 8-10 mm;
after the twisting of the steel wire ropes is finished, introducing the steel wire ropes into a hot press, applying a magnetic field vertical to the axis to the steel wire ropes, and carrying out hot pressing at the temperature of 300-500 ℃ so that the steel wire ropes connected to the surface of the steel wire ropes are uniformly distributed on the two sides of the steel wire ropes; and after the steel wire rope is introduced into the die, applying an alternating magnetic field in the die, controlling the frequency of the alternating magnetic field to be 10-15kHZ, and controlling the heating time to be 6-8S.
2. The process for preparing a high-strength aluminum sheet strip as claimed in claim 1, wherein: the steel wire ropes in the S5 are directionally arranged and then directly enter an aluminum alloy solution in a casting and rolling machine under the traction of a traction roller, the aluminum alloy solution is dragged to be shared in a gap between two rotary casting and rolling rollers to finish solidification and hot rolling, the casting and rolling time is controlled to be 3-5S, a steel plate strip with the thickness of 2.5-3mm is directly generated, and the cast and rolled steel plate strip is subjected to cold rolling for 5-8 times to obtain a high-strength aluminum plate strip with the thickness of 2-2.5 mm.
3. The process for preparing a high-strength aluminum sheet strip as claimed in claim 1, wherein: the connecting steel wire is firstly introduced into a constant magnetic field for magnetizing before twisting, so that the connecting steel wire has weak magnetism; the weak attraction force between two adjacent connecting steel wires is smaller than the elasticity of the connecting steel wires.
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