CN113652584B - Composite aluminum plate for industrial fan and preparation method thereof - Google Patents
Composite aluminum plate for industrial fan and preparation method thereof Download PDFInfo
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- CN113652584B CN113652584B CN202110938542.3A CN202110938542A CN113652584B CN 113652584 B CN113652584 B CN 113652584B CN 202110938542 A CN202110938542 A CN 202110938542A CN 113652584 B CN113652584 B CN 113652584B
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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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- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/017—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of aluminium or an aluminium alloy, another layer being formed of an alloy based on a non ferrous metal other than 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
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Abstract
The invention discloses a composite aluminum plate for an industrial fan and a preparation method thereof, wherein the composite aluminum plate comprises an internal core plate and a coating plate outside the core plate, and the core plate comprises the following metal materials in percentage: less than or equal to 0.40 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.15 percent of Cu, 0.2-1.0 percent of Mn, 4.0-6.0 percent of Mg, 0.05-0.25 percent of Cr, less than or equal to 0.25 percent of Zn, less than or equal to 0.20 percent of Ti, and the balance of Al; the material of the cladding plate comprises the following metal materials in percentage by weight: less than or equal to 0.30 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mn, less than or equal to 0.03 percent of Mg, less than or equal to 0.07 percent of Zn, less than or equal to 0.03 percent of V, less than or equal to 0.03 percent of Ti, and the balance of Al. The preparation method comprises the step of carrying out hot rolling on the core layer plate and the cladding layer plate to obtain the composite aluminum plate. The invention can solve the problem that various performances of the existing single aluminum plate or composite aluminum plate are difficult to meet the technical requirements of industrial fans.
Description
Technical Field
The invention relates to the technical field of composite aluminum plates, in particular to a composite aluminum plate for an industrial fan and a preparation method thereof.
Background
The industrial fan is widely applied to the industrial fields of mines, metallurgy, chemical industry and the like, is important equipment for industrial production, and is also high-energy-consumption equipment. With the development of society, the workload of industrial fans in various fields is gradually increased, and the problem of high energy consumption is increasingly highlighted. In order to achieve the aims of energy conservation, emission reduction, cost reduction, efficiency improvement and the like, the industrial fan becomes a necessary trend in light weight. The aluminum alloy has the characteristics of small density, high specific strength, excellent corrosion resistance, good weldability and the like, and becomes a first-choice material for light weight of industrial fans.
The single-material aluminum alloy industrial fan prepared in the prior art is prepared by adopting high-magnesium 5xxx series aluminum alloy, when the single-material aluminum alloy industrial fan is applied to high-temperature, humid and acid-containing gas environments, metal circulation parts inside the single-material aluminum alloy industrial fan are damaged due to corrosion, and the single-material aluminum alloy industrial fan has a service life of less than ten days in severe cases. Because the material is limited by the characteristics, namely high corrosion resistance, is realized by reducing the alloying degree, but the reduction of the alloying degree causes strength attenuation, so that the structural strength of the product cannot meet the application requirements, and the strength and the corrosion resistance of the material cannot be simultaneously improved to excellent levels. Moreover, when the industrial fan made of single-material aluminum alloy is used, the surface of the metal circulating component inside the industrial fan needs to be coated with anticorrosive paint regularly to prolong the service life, but the use cost is increased, the production continuity is affected, and the environmental protection problem is also brought. Therefore, it is an urgent task to develop a composite aluminum plate for an industrial blower, which has both excellent strength and corrosion resistance.
The prior art has three types of composite aluminum plates, and the structures of the composite aluminum plates are generally an inner core plate and an outer cladding plate, and the composite aluminum plates are obtained by hot rolling. The first type is mainly compounded by 3xxx and 4xxx series aluminum alloys, is mainly used for heat exchangers, has better corrosion resistance, but has lower strength, and cannot meet the structural strength requirement of an industrial fan; the second product is formed by compounding 1xxx, 2xxx, 6xxx and 7xxx aluminum alloys in pairs, can obtain good strength after solution quenching and aging, has longer preparation process, higher cost and obvious stress corrosion characteristic, and is difficult to be applied to industrial fans; the third is a few cases of compounding 1xxx and 5xxx series aluminum alloys, but the cases are all concentrated on low magnesium 5xxx (Mg is less than or equal to 3.5 percent), and are mostly applied to the fields of automobile fenders, buildings and the like, the products have better corrosion resistance and certain strength, but the highest strength of the products can not meet the use requirement of industrial fans due to lower alloying degree; the high-magnesium 5xxx (Mg is more than 3.5%) has high alloying degree and excellent strength, but has obvious work hardening characteristic, so the processing plasticity is greatly different from that of other series aluminum alloy, and the method has few cases of composite success.
Disclosure of Invention
The invention aims to solve the problem that the performance of the existing single aluminum plate or composite aluminum plate is difficult to meet the technical requirements of the industrial fan.
In order to solve the problems, the technical scheme of the invention is as follows: the composite aluminum plate for the industrial fan comprises an inner core plate and a coating plate outside the core plate, wherein the material of the core plate comprises the following metal materials in percentage: less than or equal to 0.40 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.15 percent of Cu, 0.2 to 1.0 percent of Mn, 4.0 to 6.0 percent of Mg, 0.05 to 0.25 percent of Cr, less than or equal to 0.25 percent of Zn, less than or equal to 0.20 percent of Ti, and the balance of Al; the material of the cladding plate comprises the following metal materials in percentage by weight: less than or equal to 0.30 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mn, less than or equal to 0.03 percent of Mg, less than or equal to 0.07 percent of Zn, less than or equal to 0.03 percent of V, less than or equal to 0.03 percent of Ti, and the balance of Al.
In order to solve the problems, the technical scheme of the invention is as follows: the preparation method of the composite aluminum plate for the industrial fan comprises the following steps of A, preparing a core layer plate: proportioning various metal materials according to a proportion, and obtaining a core layer plate after smelting, degassing, filtering, casting, head and tail cutting and face milling; the cross section is rectangular, and the right-angle side of the core layer plate leads an arc;
b, preparing a cladding plate: mixing various metal materials according to a proportion, and obtaining a cladding plate after smelting, degassing, filtering, casting, head and tail cutting, face milling, heating, hot rolling, stretching and saw cutting;
c, surface cleaning: b, performing decontamination, ash removal, drying and cleaning treatment on the composite contact surface of the core plate obtained in the step A and the cladding plate obtained in the step B;
d, compound fixation: c, the core layer plate and the cladding layer plate with the cleaned surfaces in the step C are placed in a centering mode according to a cladding layer plate/core layer plate/cladding layer plate mode, and high-temperature steel belts are used for binding and fixing to form a composite blank;
e, heating: heating the composite blank fixed in the step D, wherein the heating temperature in the first stage is 400-450 ℃, and keeping the temperature for 2-8 hours; the second stage is at 480-530 ℃ and is kept for 3-15 hours;
f, hot rolling: e, carrying out hot rolling on the heated composite blank; the speed difference between the upper working roll and the lower working roll is not more than 0.5 percent during hot rolling; the 1 st to 2 nd pass is in a rolling force control mode, the rolling force is 100 to 200 tons, and the rolling is started after the 1 st pass is pressed from the position of 200 to 300mm at the head of the composite blank; the 3 rd to 6 th passes are in a rolling reduction control mode, the 3 rd to 4 th passes have absolute rolling reduction of 1 mm to 4mm, and the 5 th to 6 th passes have absolute rolling reduction of 5mm to 10 mm; the 7 th pass and the subsequent pass are in a conventional rolling mode, the maximum pass reduction is not more than 32mm, and the final rolling temperature is 300-340 ℃, so that the composite aluminum plate is prepared;
g, stretching and sawing: and F, stretching the composite aluminum plate obtained in the step F, wherein the stretching rate is 0.5% -1.5%, and then sawing to obtain a finished product specification to obtain a finished product of the composite aluminum plate.
Further: the thickness of the core layer plate is 400 mm-500 mm, and the radius of the arc is 20 mm-30 mm; the thickness of the coating layer plate is 25 mm-35 mm, the length of the coating layer plate is 500 mm-600 mm shorter than that of the core layer plate, and the width of the coating layer plate is 100 mm-150 mm narrower than that of the core layer plate.
Further: the thickness of the composite aluminum plate finished product is 15 mm-25 mm.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
compared with the common steel plate of the industrial fan, the composite aluminum plate obtained by adjusting the metal content proportion of the core layer plate and the cladding layer plate and adjusting the size of the core layer plate and the cladding layer plate and controlling various parameters of hot rolling passes has the characteristics of small density, high specific strength, good plasticity and the like, is easy to spin-form, and is beneficial to light weight, noise reduction and energy consumption reduction; compared with the traditional single-layer aluminum plate, the aluminum plate has higher corrosion resistance, the service life of the aluminum plate is as long as 2-5 years in an acid-wet flue gas environment, and the service life of the single-layer aluminum plate prepared by a typical process is only 3-6 months, so that the service life is obviously prolonged, and the use cost is reduced; compared with the traditional multilayer composite aluminum plate, the method has more efficient process flow, the core layer ingot and the coating layer ingot do not need homogenization annealing treatment, the composite plate does not need finished product annealing treatment, the efficiency is obviously improved, and the cost is reduced; and during subsequent processing, the surface of the alloy is not required to be coated with anticorrosive paint, so that the cost is reduced, the effect is improved, and the environment is protected.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the present invention.
Detailed Description
The following examples are provided for further details of the invention:
example 1:
the composite aluminum plate for the industrial fan comprises a core plate and a cladding plate outside the core plate, wherein the core plate is made of alloy components consisting of the following metal materials in percentage by mass: 0.095% of Si, 0.303% of Fe, 0.013% of Cu, 0.659% of Mn, 4.655% of Mg, 0.096% of Cr, 0.028% of Zn, 0.026% of Ti, and the balance of Al and inevitable elements. The material of the cladding plate comprises the following metal materials in percentage by mass: 0.029% of Si, 0.131% of Fe, 0.001% of Cu, 0.002% of Mn, 0.003% of Mg, 0.029% of Zn, 0.009% of V, 0.022% of Ti, and the balance of Al and inevitable elements.
The preparation method of the composite aluminum plate for the industrial fan comprises the following operation steps:
a, preparing a core plate: preparing materials according to the designed alloy components of the core layer plate, and respectively preparing core layer cast ingots with the thickness of 520mm after smelting, degassing, filtering and casting; the cross section is rectangular, and the right-angle side of the core layer plate leads the circular arc, and the radius of the circular arc is 30 mm.
B, preparing a cladding plate: preparing materials according to the designed alloy components of the cladding plate, and respectively preparing a cladding cast ingot with the thickness of 500mm after smelting, degassing, filtering and casting; and (3) cutting the head and the tail of the coating cast ingot, milling the surface, heating, hot rolling, stretching, sawing and the like to obtain a coating layer plate with the thickness of 35 mm. The core layer plate accounts for 88% of the total thickness of the composite material, and the cladding layer plate accounts for 12% of the total thickness of the composite material; the cladding plate length is 600mm shorter than the core plate length, and the width is 150mm narrower than the core plate width.
C, surface cleaning: and (4) cleaning oil stains, aluminum scraps and dust on the composite contact surface of the core layer plate and the cladding layer plate obtained in the step A, B, and blowing and drying by using compressed air.
D, compound fixation: c, the core layer plate and the cladding layer plate with the cleaned surfaces in the step C are placed in a centering mode according to the mode of the cladding layer plate/the core layer plate/the cladding layer plate, and the head, the middle, the tail and the like of the composite blank are bound and fixed by a high-temperature steel belt.
E, heating: d, heating the composite blank fixed in the step D, wherein the heating temperature in the first stage is 420 ℃, and keeping the temperature for 4 hours; the second stage heating temperature is 510 ℃, and the temperature is kept for 12 hours.
F, hot rolling: and E, keeping the direction of the milling cutter mark on the surface of the core plate in the composite blank heated in the step E consistent with the movement direction of the 1 st pass, and removing the steel strip to start hot rolling. And (3) slow rolling is carried out in 6 passes before hot rolling, the rolling speed is 0.05-0.5 m/s, and no emulsion is sprayed. The 1 st to 2 nd passes are in a rolling force control mode, and the rolling force is 150 tons; rolling is started after the 1 st pass is pressed from the position 300mm away from the head of the composite blank; and (4) rolling in the 2 nd pass with the same rolling force and roll gap size as those in the 1 st pass. The 3 rd to 6 th passes are in a rolling reduction control mode, the 3 rd to 4 th passes have absolute rolling reduction of 4mm, and the 5 th to 6 th passes have absolute rolling reduction of 8 mm. And (3) performing hot rolling on the 7 th pass and the subsequent passes of the hot rolling at a fast rolling speed of 0.8-2.0 m/s, starting emulsion spraying, performing hot rolling on the upper and lower working rolls at a speed difference of 0.2%, performing maximum pass reduction of 33.20mm, and performing final rolling at a temperature of 320 ℃ to obtain the composite plate.
G, stretching and sawing: and F, stretching the composite aluminum plate obtained in the step F with the stretching rate of 0.6%, and sawing to obtain a finished product with the thickness of 20 mm.
Example 2:
the composite aluminum plate for the industrial fan comprises a core plate and a cladding plate outside the core plate, wherein the core plate is made of the following components in percentage by mass: 0.102% of Si, 0.272% of Fe, 0.022% of Cu, 0.632% of Mn, 4.823% of Mg, 0.086% of Cr, 0.025% of Zn, 0.024% of Ti, and the balance of Al and inevitable elements.
The material of the cladding plate comprises the following metal materials in percentage by mass: 0.012% of Si, 0.154% of Fe, 0.002% of Cu, 0.003% of Mn, 0.001% of Mg, 0.034% of Zn, 0.011% of V, 0.016% of Ti, and the balance of Al and unavoidable elements.
The preparation method of the composite aluminum plate for the industrial fan comprises the following operation steps:
a, preparing a core plate: the alloy components of the designed core layer plate are proportioned, and core layer cast ingots with the thickness of 450mm are respectively prepared after smelting, degassing, filtering and casting, wherein the cross section of each core layer plate is rectangular, the right-angle side of each core layer plate leads an arc, and the radius of each arc is 20 mm.
B, preparing a cladding plate: preparing materials according to the designed alloy components of the cladding plate, and respectively preparing cladding cast ingots with the thickness of 430mm after smelting, degassing, filtering and casting; and (3) cutting the head and the tail of the coating cast ingot, milling the surface, heating, hot rolling, stretching, sawing and the like to obtain a coating layer plate with the thickness of 25 mm. The core layer plate accounts for 90% of the total thickness of the composite material, and the cladding layer plate accounts for 10% of the total thickness of the composite material; the cladding plate length is 500mm shorter than the core plate length, and the width is 100 mm narrower than the core plate width.
C, surface cleaning: and (4) cleaning oil stains, aluminum scraps and dust on the composite contact surface of the core layer plate and the cladding layer plate obtained in the step A, B, and blowing and drying by using compressed air.
D, compound fixation: c, the core layer plate and the cladding layer plate with the cleaned surfaces in the step C are placed in a centering mode according to the mode of the cladding layer plate/the core layer plate/the cladding layer plate, and the head, the middle, the tail and the like of the composite blank are bound and fixed by a high-temperature steel belt.
E, heating: d, heating the composite blank fixed in the step D, wherein the heating temperature in the first stage is 430 ℃, and preserving heat for 3 hours; the second stage heating temperature is 520 ℃, and the temperature is kept for 10 hours.
F, hot rolling: and E, keeping the direction of the milling cutter mark on the surface of the core plate in the composite blank heated in the step E consistent with the movement direction of the 1 st pass, and removing the steel strip to start hot rolling. And (3) slow rolling is carried out in 6 passes before hot rolling, the rolling speed is 0.05-0.5 m/s, and no emulsion is sprayed. The 1 st to 2 nd passes are in a rolling force control mode, and the rolling force is 100 tons; rolling after the 1 st pass is pressed from the position of 200mm at the head of the composite blank; and (4) rolling in the 2 nd pass with the same rolling force and roll gap size as those in the 1 st pass. The 3 rd to 6 th passes are in a rolling reduction control mode, the 3 rd to 4 th passes have the absolute rolling reduction of 2mm, and the 5 th to 6 th passes have the absolute rolling reduction of 5 mm. And (3) performing hot rolling on the 7 th pass and the subsequent passes of the hot rolling at a fast rolling speed of 0.8-2.0 m/s, starting emulsion spraying, and performing hot rolling on the upper working roll and the lower working roll at a speed difference of 0.3%, wherein the maximum pass reduction is 32.18mm, and the final rolling temperature is 310 ℃ to obtain the composite plate.
G, stretching and sawing: and F, stretching the composite aluminum plate obtained in the step F with the stretching rate of 0.5%, and sawing to obtain a finished product with the thickness of 05 mm.
Example 3:
the composite aluminum plate for the industrial fan comprises a core plate and a cladding plate outside the core plate, wherein the core plate is made of alloy components consisting of the following metal materials in percentage by mass: 0.052% of Si, 0.157% of Fe, 0.008% of Cu, 0.525% of Mn, 4.570% of Mg, 0.078% of Cr, 0.034% of Zn, 0.019% of Ti, and the balance of Al and inevitable elements.
The material of the cladding plate comprises the following metal materials in percentage by mass: 0.027% of Si, 0.226% of Fe, 0.011% of Cu, 0.003% of Mn, 0.002% of Mg, 0.023% of Zn, 0.006% of V, 0.015% of Ti, and the balance of Al and inevitable elements.
The preparation method of the composite aluminum plate for the industrial fan comprises the following operation steps:
a, preparing a core plate: the alloy components of the designed core layer plate are proportioned, and after smelting, degassing, filtering and casting, a core layer ingot with the thickness of 480mm is respectively prepared, the cross section is rectangular, the right-angle edge of the core layer plate leads to an arc, and the radius of the arc is 26 mm.
B, preparing a cladding plate: preparing materials according to the designed alloy components of the cladding plate, and respectively preparing a cladding cast ingot with the thickness of 460mm after smelting, degassing, filtering and casting; and (3) cutting the head and the tail of the coating cast ingot, milling the surface, heating, hot rolling, stretching, sawing and the like to obtain a coating plate with the thickness of 20 mm. The core layer plate accounts for 92% of the total thickness of the composite material, and the cladding layer plate accounts for 8% of the total thickness of the composite material; the cladding sheet length was 552 mm shorter than the core sheet length and the width was 123mm narrower than the core sheet width.
C, surface cleaning: and (4) cleaning oil stains, aluminum scraps and dust on the composite contact surface of the core layer plate and the cladding layer plate obtained in the step A, B, and blowing and drying by using compressed air.
D, compound fixation: c, the core layer plate and the cladding layer plate with the cleaned surfaces in the step C are placed in a centering mode according to the mode of the cladding layer plate/the core layer plate/the cladding layer plate, and the head, the middle, the tail and the like of the composite blank are bound and fixed by a high-temperature steel belt.
E, heating: d, heating the composite blank fixed in the step D, wherein the heating temperature in the first stage is 410 ℃, and keeping the temperature for 5 hours; the second stage heating temperature is 530 ℃, and the temperature is kept for 8 hours.
F, hot rolling: and E, keeping the direction of the milling cutter mark on the surface of the core plate in the composite blank heated in the step E consistent with the movement direction of the 1 st pass, and removing the steel strip to start hot rolling. And (3) slow rolling is carried out in 6 passes before hot rolling, the rolling speed is 0.05-0.5 m/s, and no emulsion is sprayed. The 1 st to 2 nd pass is in a rolling force control mode, and the rolling force is 130 tons; rolling the composite blank after the 1 st pass is pressed from the position 250mm away from the head of the composite blank; and (4) rolling in the 2 nd pass with the same rolling force and roll gap size as those in the 1 st pass. The 3 rd to 6 th passes are in a rolling reduction control mode, the 3 rd to 4 th passes have the absolute rolling reduction of 3mm, and the 5 th to 6 th passes have the absolute rolling reduction of 10 mm. And (3) performing hot rolling on the 7 th pass and the subsequent passes of the hot rolling at a fast rolling speed of 0.8-2.0 m/s, starting emulsion spraying, performing hot rolling on the upper and lower working rolls at a speed difference of 0.1%, performing maximum pass reduction of 35.49mm, and performing final rolling at a final rolling temperature of 330 ℃ to obtain the composite plate.
G, stretching and sawing: and F, stretching the composite aluminum plate obtained in the step F with the stretching rate of 0.8%, and sawing to obtain a finished product with the thickness of 25 mm.
Comparative example 1:
the comparative example is a single high-magnesium 5xxx aluminum alloy material, the alloy composition consisting of, in mass percent: 0.125% of Si, 0.239% of Fe, 0.011% of Cu, 0.506% of Mn, 4.601% of Mg, 0.106% of Cr, 0.033% of Zn, 0.037% of Ti, and the balance of Al and inevitable elements; preparing materials according to the designed alloy components, and obtaining an ingot with the thickness of 560mm after smelting, degassing, filtering and casting; carrying out homogenizing annealing on the cast ingot, wherein the annealing temperature is 520 ℃, and preserving the heat for 10 hours; then cutting the head and the tail, and milling the surface to obtain a plate ingot with the thickness of 520 mm; and (3) putting the slab ingot into a heating furnace for heating, wherein the heating temperature is 500 ℃, keeping the temperature for 4 hours, rolling the cast ingot to a plate with the thickness of 20mm after heating is finished, and the hot rolling finishing temperature is 245 ℃.
Comparative example 2:
the composite material comprises a core plate and a cladding plate outside the core plate, wherein the alloy composition of the core plate comprises the following components in percentage by mass: 0.24% of Si, 0.11% of Fe, 0.12% of Cu, 0.06% of Mn, 2.3% of Mg, 0.13% of Cr, 0.11% of Zn, and the balance of Al and unavoidable elements.
The alloy components of the coating layer plate comprise the following components in percentage by mass: 0.09% of Si, 0.42% of Fe, 0.05% of Cu, 0.03% of Mn, 0.003% of Mg, 0.04% of Zn, 0.03% of V, 0.02% of Ti, and the balance of Al and unavoidable elements.
The specific operation steps are as follows:
a, mixing materials according to designed alloy components, and respectively obtaining a core layer alloy ingot and a coating layer alloy ingot with the thickness of 520mm after smelting, degassing, filtering and casting; respectively carrying out homogenization annealing on the core layer alloy ingot and the coating layer alloy ingot, wherein the annealing temperature of the core layer alloy ingot is 450 ℃, and the heat preservation time is 20 hours, and the annealing temperature of the coating layer alloy ingot is 550 ℃, and the heat preservation time is 8 hours; then respectively carrying out treatments such as head and tail cutting, face milling and the like to obtain a core layer alloy plate and a cladding layer plate with the thickness of 500 mm; and (3) performing head and tail cutting, face milling, heating, hot rolling, stretching, saw cutting and other treatment on the coating plate to obtain the coating plate with the thickness of 22mm, wherein the core plate accounts for 92% of the total thickness of the composite material, and the coating plate accounts for 8% of the total thickness of the composite material.
And b, respectively carrying out surface treatment on the core layer plate and the cladding layer plate prepared in the step a, and then welding and fixing the core layer plate and the cladding layer plate in a cladding layer/core layer/cladding layer combination mode.
c, preheating the blank welded in the step b in a heating furnace at the heating temperature of 520 ℃ for 3 hours, and then hot rolling to the thickness of 20.2mm and the finish rolling temperature of 260 ℃.
d, annealing the finished product of the composite board prepared in the step c at the annealing temperature of 330 ℃, preserving heat for 1.2 hours, taking out, straightening by a straightening machine, and sawing to obtain the finished product.
The aluminum composite panels prepared in examples 1-3 were tested for performance with the single aluminum alloy material prepared in comparative example 1 and the low-magnesium 5xxx aluminum composite panel prepared in comparative example 2, with the results shown in table 1,
therefore, compared with single aluminum materials and existing composite aluminum materials, the aluminum alloy composite plate prepared by the invention has the advantages that the corrosion performance is obviously improved, and the mechanical property is better.
Claims (3)
1. A preparation method of a composite aluminum plate for an industrial fan comprises an inner core plate and an outer cladding plate, and is characterized in that: the material of the core plate comprises the following metal materials in percentage by weight: less than or equal to 0.40 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.15 percent of Cu, 0.2 to 1.0 percent of Mn, 4.0 to 6.0 percent of Mg, 0.05 to 0.25 percent of Cr, less than or equal to 0.25 percent of Zn, less than or equal to 0.20 percent of Ti, and the balance of Al;
the material of the cladding plate comprises the following metal materials in percentage by weight: less than or equal to 0.30 percent of Si, less than or equal to 0.40 percent of Fe, less than or equal to 0.05 percent of Cu, less than or equal to 0.03 percent of Mn, less than or equal to 0.03 percent of Mg, less than or equal to 0.07 percent of Zn, less than or equal to 0.03 percent of V, less than or equal to 0.03 percent of Ti, and the balance of Al;
the method comprises the following steps:
a, preparing a core plate: proportioning various metal materials according to a proportion, and obtaining a core layer plate after smelting, degassing, filtering, casting, head and tail cutting and face milling; the cross section is rectangular, and the right-angle side of the core layer plate leads an arc;
b, preparing a coating layer plate: mixing various metal materials according to a proportion, and obtaining a cladding plate after smelting, degassing, filtering, casting, head and tail cutting, face milling, heating, hot rolling, stretching and saw cutting;
c, surface cleaning: b, performing decontamination, ash removal, drying and cleaning treatment on the composite contact surface of the core plate obtained in the step A and the cladding plate obtained in the step B;
d, compound fixation: c, the core layer plate and the cladding layer plate with the cleaned surfaces in the step C are placed in a centering mode according to a cladding layer plate/core layer plate/cladding layer plate mode, and high-temperature steel belts are used for binding and fixing to form a composite blank;
e, heating: heating the composite blank fixed in the step D, wherein the heating temperature in the first stage is 400-450 ℃, and keeping the temperature for 2-8 hours; the second stage is at 480-530 ℃ and is kept for 3-15 hours;
f, hot rolling: e, carrying out hot rolling on the composite blank heated in the step E; the speed difference between the upper working roll and the lower working roll is not more than 0.5 percent during hot rolling; the 1 st to 2 nd pass is in a rolling force control mode, the rolling force is 100 to 200 tons, and the rolling is started after the 1 st pass is pressed from the position of 200 to 300mm at the head of the composite blank; the 3 rd to 6 th passes are in a rolling reduction control mode, the 3 rd to 4 th passes have absolute rolling reduction of 1 mm to 4mm, and the 5 th to 6 th passes have absolute rolling reduction of 5mm to 10 mm; the 7 th pass and the subsequent pass are in a conventional rolling mode, the maximum pass reduction is not more than 32mm, and the final rolling temperature is 300-340 ℃, so that the composite aluminum plate is prepared;
g, stretching and sawing: and F, stretching the composite aluminum plate obtained in the step F, wherein the stretching rate is 0.5% -1.5%, and then sawing to obtain a finished product specification to obtain a finished product of the composite aluminum plate.
2. The method for preparing the composite aluminum plate for the industrial fan according to claim 1, wherein: the thickness of the core layer plate is 400 mm-500 mm, and the radius of the arc is 20 mm-30 mm; the thickness of the coating layer plate is 25 mm-35 mm, the length of the coating layer plate is 500 mm-600 mm shorter than that of the core layer plate, and the width of the coating layer plate is 100 mm-150 mm narrower than that of the core layer plate.
3. The method for preparing the composite aluminum plate for the industrial fan, according to claim 2, is characterized in that: the thickness of the composite aluminum plate finished product is 15 mm-25 mm.
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| EP1812232A2 (en) * | 2004-11-16 | 2007-08-01 | Aleris Aluminum Duffel BVBA | Aluminium composite sheet material |
| EP2302087A1 (en) * | 2009-09-15 | 2011-03-30 | Hydro Aluminium Deutschland GmbH | Undercarriage section made of AL compound material |
| CN109468509A (en) * | 2018-12-28 | 2019-03-15 | 广西柳州银海铝业股份有限公司 | The production method of 5059 aluminum alloy plate materials peculiar to vessel |
| CN109763041A (en) * | 2019-03-14 | 2019-05-17 | 广西南南铝加工有限公司 | A kind of 1xxx/5xxx Al alloy composite and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1812232A2 (en) * | 2004-11-16 | 2007-08-01 | Aleris Aluminum Duffel BVBA | Aluminium composite sheet material |
| EP2302087A1 (en) * | 2009-09-15 | 2011-03-30 | Hydro Aluminium Deutschland GmbH | Undercarriage section made of AL compound material |
| CN109468509A (en) * | 2018-12-28 | 2019-03-15 | 广西柳州银海铝业股份有限公司 | The production method of 5059 aluminum alloy plate materials peculiar to vessel |
| CN109763041A (en) * | 2019-03-14 | 2019-05-17 | 广西南南铝加工有限公司 | A kind of 1xxx/5xxx Al alloy composite and preparation method thereof |
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