CN112410594A - Manufacturing method of 4343 aluminum alloy skin material for brazing composite material - Google Patents
Manufacturing method of 4343 aluminum alloy skin material for brazing composite material Download PDFInfo
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- CN112410594A CN112410594A CN202011366883.XA CN202011366883A CN112410594A CN 112410594 A CN112410594 A CN 112410594A CN 202011366883 A CN202011366883 A CN 202011366883A CN 112410594 A CN112410594 A CN 112410594A
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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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- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
- C22C21/04—Modified aluminium-silicon alloys
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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
- C22F1/043—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 silicon as the next major constituent
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Abstract
The invention belongs to the field of aluminum alloy rolling, and discloses a method for manufacturing a 4343 aluminum alloy skin material for a brazing composite material, which comprises the steps of proportioning and smelting according to 4343 brand aluminum alloy components, performing secondary refining and Sr modification treatment by reversing a furnace and turning a standing furnace, performing grain refinement treatment by adding aluminum-titanium-boron wires through a runner, degassing and filtering, producing by a continuous casting and rolling machine to obtain a cast and rolled blank, and finally performing high-temperature homogenization annealing, rough middle rolling, longitudinal shearing edge, straightening and plate correcting, surface residual oil cleaning and finished product annealing on the cast and rolled blank to obtain a skin material finished product for composite use. The method can obviously improve the yield and shorten the processing flow period, and simultaneously the leather material prepared by the method has the characteristics of good plate type, good surface quality, no coarse primary crystal silicon, fine silicon particles in a matrix and uniform distribution, and the composite material prepared by the leather material shows a stable melting point interval, better fluidity and gap filling capability in the brazing process.
Description
Technical Field
The invention relates to a processing technology of an aluminum alloy material, in particular to a manufacturing method of a 4343 aluminum alloy skin material for a brazing composite material, belonging to the field of aluminum alloy rolling.
Background
Continuous casting and rolling are used as a forming technology for directly preparing liquid metal into a plate blank in a near-infrared final shape, the technology has the characteristics of high efficiency, short flow, energy conservation and environmental protection, and the technology is widely applied at home and abroad particularly in the aluminum processing industry. In particular, in recent years, continuous improvement and innovation of a casting and rolling process enable the casting and rolling method to be used for producing some unconventional alloy slabs with high production difficulty.
The skin material for the 4343 aluminum alloy brazing composite material is prepared by hot rolling a hot-rolled ingot and then performing fixed-length transverse shearing in the traditional method, and has the defects of low utilization rate due to the fact that a large amount of head and tail materials are sawed in the subsequent hot rolling compounding process besides the defects of complex hot rolling processing process, long period, high energy consumption and the like. For a long time, the problems of large tissue difference, cast-rolling edge cracking and the like are easily caused when the 4343 aluminum alloy skin material is cast-rolled to produce a plate blank, and a mature production process is not disclosed all the time.
Disclosure of Invention
The invention aims to develop a near-net type leather material production mode by a continuous casting method, greatly improve the yield and the production efficiency of products on the premise of ensuring good brazing performance of leather materials through special process design of smelting, casting and rolling and subsequent procedures, and finally achieve the effects of reducing cost, improving efficiency, saving energy, protecting environment and improving the competitiveness of the products in the market.
In order to achieve the purpose, the invention provides the following technical scheme:
a manufacturing method of 4343 aluminum alloy skin material for brazing composite material comprises the following steps:
proportioning according to the component proportion of 4343-grade aluminum alloy, adding a slag former and a refining agent for smelting, then refining by adopting glycerol in a standing furnace, adding an aluminum-strontium intermediate alloy for modification during refining, adding an aluminum-titanium-boron wire for grain refinement, degassing, filtering, casting and rolling, carrying out high-temperature homogenization annealing, rolling the casting blank material subjected to high-temperature homogenization into the thickness of a skin material finished product through rough rolling and medium rolling, longitudinally shearing edges, straightening, cleaning and annealing the finished product.
Further, the refining gas is nitrogen, and the dosage of the refining agent is as follows: 1.2-1.8kg/t aluminum.
Further, the smelting furnace adopts aluminum-silicon alloy for Si supplement, and the down-pouring temperature is 740-.
Further, the heat preservation temperature of the standing furnace is 730-: 0.13-0.19kg/t aluminum, no cold plate is added for each refining.
Further, adding an aluminum-strontium intermediate alloy for modification treatment during refining, wherein the strontium content is 0.02-0.05%, and standing for 6-15 minutes after feeding.
Furthermore, the adding speed of the aluminum-titanium-boron wire is 18-22 Hz.
Further, the temperature of the degassing box is 700-3And/h, the rotor speed is 225-275rpm, the temperature of the filter box is 700-720 ℃, and secondary filtration is carried out, wherein the mesh number of the filter sheets is 40 and 50 meshes respectively.
Further, the temperature of the casting and rolling front box is controlled to 665-.
Further, the homogenizing annealing process comprises the following steps: quickly raising the temperature of the furnace gas to 520 ℃, preserving the heat for 12-17h, preserving the heat for 3-5h at the temperature of the converter gas of 500 ℃, and discharging and cooling.
Further, the annealing process of the finished product comprises the following steps: heating the furnace gas to 260 ℃ for 1h, preserving heat for 3h to remove oil, heating to 450 ℃ again, preserving heat for 7-11h, preserving heat of the converter gas at 390 ℃ for 2-4h, discharging and cooling, and checking the size and distribution of finished silicon particles, wherein the finished silicon particles are required to be free of coarse primary crystal silicon and fine and uniformly distributed.
A manufacturing method of a 4343 aluminum alloy skin material for a brazing composite material specifically comprises the following steps:
proportioning and smelting: proportioning according to the component proportion of 4343-grade aluminum alloy, wherein the proportion of waste is controlled to be 35-55%, a slag former, a refining agent and a liquid refining agent are used for smelting, the refining gas is nitrogen, and the dosage of the refining agent is as follows: 1.2-1.8kg/t aluminum, and the dosage of glycerol is as follows: 0.13-0.19kg/t aluminum, aluminum-silicon alloy is adopted for Si supplement in the smelting furnace, and the down-pouring temperature is 740-755 ℃.
Secondly, refining and modification treatment in a standing furnace: the temperature of the standing furnace is 730-750 ℃, the refining uses glycerol, the refining gas is nitrogen, a cold plate is not added in each refining, an aluminum-strontium intermediate alloy is added in the refining for modification treatment, the strontium content needs to be controlled to be 0.02-0.05%, and the standing is needed for 6-15 minutes after the material supplement.
Thirdly, grain refinement treatment: and before degassing and filtering the melt through a launder, an aluminum-titanium-boron wire is required to be added for grain refinement treatment, and the adding speed of the titanium wire is 18-22 Hz.
And fourthly, degassing and filtering treatment: the temperature of the degassing box is 700-3And/h, the rotor speed is 225-275rpm, the temperature of the filter box is 700-720 ℃, and secondary filtration is carried out, wherein the mesh number of the filter sheets is 40 and 50 meshes respectively.
Casting and rolling: the temperature of a casting and rolling front box is controlled to 665-.
Sixthly, high-temperature homogenizing annealing: the cast-rolled blank needs an advanced high-temperature annealing furnace for homogenization annealing, and the process comprises the following steps: quickly raising the temperature of the furnace gas to 520 ℃, preserving the heat for 12-17h, preserving the heat for 3-5h at the temperature of the converter gas of 500 ℃, and discharging and cooling.
Carrying out rough and medium rolling: the thickness of the finished product of the casting blank material after high-temperature homogenization is required to be further subjected to rough rolling and intermediate rolling, the thickness of the finished product is required to be 0.35-0.75 mm, oil control is required to be paid attention to the thickness pass of the finished product, the thickness of an outlet is required to be ensured to reach the target thickness before and after the rolling of the pass of the finished product, and the thickness is required to be compensated to the target thickness if the deviation between the calibrated thickness of a thickness gauge and the target thickness occurs.
Eighthly, longitudinal shearing edge: and (3) trimming the material with the thickness of 0.35-0.7 mm after the intermediate rolling according to the width requirement of the finished product by a slitting machine.
Ninthly, pulling, straightening and cleaning: and (4) after trimming, feeding the finished product material into a withdrawal and straightening machine to withdraw, straightening and correct the plate type and cleaning the surface, wherein the cleaning refers to the cleaning standard of a PCB product.
Annealing of a finished product in red: and (3) annealing the finished product finally after the material is subjected to pulling, straightening and cleaning, wherein the annealing process of the finished product is as follows: heating the furnace gas to 260 ℃ for 1h, preserving heat for 3h to remove oil, heating to 450 ℃ again, preserving heat for 7-11h, preserving heat of the converter gas at 390 ℃ for 2-4h, discharging and cooling, and checking the size and distribution of finished silicon particles, wherein the finished silicon particles are required to be free of coarse primary crystal silicon and fine and uniformly distributed.
Preferably, the proportion of waste materials is controlled to be 40-50% when the materials are proportioned in the step (i);
preferably, the strontium content in the step (II) needs to be controlled to be 0.04-0.05%;
preferably, the preferable rolling pass arrangement of the coarse and medium rolling in the step (c) is 6.8-5.6-4.5-3.2-2.2-1.5-1.0- (0.7-0.5-0.35) mm, and cooling is performed every three times;
preferably, the surface dyne value of the treated surface need to be controlled to be more than 50 dynes after the treated surface is subjected to the withdrawing, straightening and cleaning;
preferably, the annealing performance of the product in the step R is controlled according to performance indexes of 95-135MPa of tensile strength and more than or equal to 8% of elongation, and the average size of silicon particles in the skin material is not higher than 20 microns.
The invention discloses a method for manufacturing a 4343 aluminum alloy skin material for a brazing composite material, which comprises the steps of firstly carrying out burdening and smelting according to 4343-grade aluminum alloy components, then reversing the furnace to a standing furnace for secondary refining and Sr modification treatment, then carrying out grain refinement treatment by adding aluminum-titanium-boron wires through a runner, degassing and filtering treatment, then producing a cast-rolled blank by a continuous casting-rolling machine, and finally carrying out high-temperature homogenization annealing, rough middle rolling, longitudinal shearing edge, straightening and plate correcting, surface residual oil cleaning and finished product annealing on the cast-rolled blank to obtain a skin material finished product for compounding.
The method is different from the traditional method for producing the skin material by semi-continuous casting and ingot casting and then hot rolling and transverse shearing, can avoid the loss of head and tail saw cutting of the hot rolled skin material, reduces the head and tail cutting loss produced in the hot rolling procedure from about 15-25% to about 5%, obviously improves the yield, can obviously improve the yield and shorten the processing flow cycle (from 15 days required by the production of the hot rolling procedure to within 10 days) by using the near-net-shape continuous casting and rolling processing mode, greatly shortens the processing flow time and improves the production efficiency. The method corrects the plate shape before annealing and removes oil on the surface through the withdrawal, straightening and cleaning procedure treatment before rolling of the finished leather product, so that the prepared leather has the advantages of good plate shape, good surface quality and extremely little oil on the surface, meanwhile, the high-temperature homogenization annealing process treatment is adopted, the characteristics that no coarse primary crystal silicon exists, the average size of silicon particles in a matrix is reduced to be less than 20 mu m compared with that of the silicon particles in a material prepared by a hot rolling method, and the silicon particles are uniformly distributed are ensured, and the composite material prepared from the leather shows a stable melting point interval, good fluidity and gap filling capacity in the brazing process.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
A manufacturing method of a 4343 aluminum alloy skin material for a brazing composite material specifically comprises the following steps:
proportioning and smelting: the method comprises the following steps of proportioning 6.8-8.2% of Si, less than or equal to 0.8% of Fe, less than or equal to 0.25% of Cu, less than or equal to 0.1% of Mn, less than or equal to 0.2% of Zn and less than or equal to 0.05% of other single aluminum alloy according to the component proportion of 4343-grade aluminum alloy, controlling the proportion of waste materials to be 35-55%, and using a slag striking agent and a refining agent in smelting, wherein the refining agent is liquid CCl4Refining agent, wherein the refining gas is nitrogen, and the dosage of the refining agent is as follows: 1.2-1.8kg/t aluminum, and the smelting furnace adopts aluminum-silicon alloy for Si supplementThe furnace reversing temperature is 740-755 ℃.
Secondly, refining and modification treatment in a standing furnace: the heat preservation temperature of the standing furnace is 730-750 ℃, and the glycerol is used for refining, wherein the usage amount of the glycerol is as follows: 0.13-0.19kg/t aluminum, refining gas is nitrogen, no cold plate is added in each refining, aluminum-strontium intermediate alloy is added for modification treatment during the refining, the strontium content needs to be controlled at 0.02-0.05%, and the mixture needs to be kept stand for 6-15 minutes after feeding.
Thirdly, grain refinement treatment: and before degassing and filtering the melt through a launder, an aluminum-titanium-boron wire is required to be added for grain refinement treatment, and the adding speed of the titanium wire is 18-22 Hz.
And fourthly, degassing and filtering treatment: the temperature of the degassing box is 700-3And/h, the rotor speed is 225-275rpm, the temperature of the filter box is 700-720 ℃, and secondary filtration is carried out, wherein the mesh number of the filter sheets is 40 and 50 meshes respectively.
Casting and rolling: the temperature of a casting and rolling front box is controlled to 665-.
Sixthly, high-temperature homogenizing annealing: the cast-rolled blank needs an advanced high-temperature annealing furnace for homogenization annealing, and the process comprises the following steps: quickly raising the temperature of the furnace gas to 520 ℃, preserving the heat for 12-17h, preserving the heat for 3-5h at the temperature of the converter gas of 500 ℃, and discharging and cooling.
Carrying out rough and medium rolling: the high-temperature homogenized casting blank material needs to be further subjected to rough rolling and intermediate rolling to obtain a skin material finished product with the thickness of 0.35-0.75 mm, oil control needs to be paid attention to the thickness pass of the finished product, the outlet thickness needs to be ensured to reach the target thickness before and after the rolling of the finished product pass, and the outlet thickness needs to be compensated to the target thickness if the deviation between the calibrated thickness of the thickness gauge and the target thickness occurs.
Eighthly, longitudinal shearing edge: and (3) trimming the material with the thickness of 0.35-0.7 mm after the intermediate rolling according to the width requirement of the finished product by a slitting machine.
Ninthly, pulling, straightening and cleaning: and (4) after trimming, feeding the finished product material into a withdrawal and straightening machine to withdraw, straightening and correct the plate type and cleaning the surface, wherein the cleaning refers to the cleaning standard of a PCB product.
Annealing of a finished product in red: and (3) annealing the finished product finally after the material is subjected to pulling, straightening and cleaning, wherein the annealing process of the finished product is as follows: heating the furnace gas to 260 ℃ for 1h, preserving heat for 3h to remove oil, heating to 450 ℃ again, preserving heat for 7-11h, preserving heat of the converter gas at 390 ℃ for 2-4h, discharging and cooling, and checking the size and distribution of finished silicon particles, wherein the finished silicon particles are required to be free of coarse primary crystal silicon and fine and uniformly distributed.
Preferably, the proportion of waste materials is controlled to be 40-50% when the materials are proportioned in the step (i);
preferably, the strontium content in the step (II) needs to be controlled to be 0.04-0.05%;
preferably, the preferable rolling pass arrangement of the coarse and medium rolling in the step (c) is 6.8-5.6-4.5-3.2-2.2-1.5-1.0- (0.7-0.5-0.35) mm, and cooling is performed every three times;
preferably, the surface dyne value of the treated surface need to be controlled to be more than 50 dynes after the treated surface is subjected to the withdrawing, straightening and cleaning;
preferably, the annealing performance of the product in the step R is controlled according to performance indexes of 95-135MPa of tensile strength and more than or equal to 8% of elongation, and the average size of silicon particles in the skin material is not higher than 20 microns.
Example 2
The method for preparing the 4343 aluminum alloy skin material for the brazing composite material comprises the following steps:
(1) preparing an aluminum alloy raw material according to the mass fraction percentage ratio of 4343-grade aluminum alloy components, namely 6.8-8.2% of Si, less than or equal to 0.8% of Fe, less than or equal to 0.25% of Cu, less than or equal to 0.1% of Mn, less than or equal to 0.2% of Zn, and less than or equal to 0.05% of other single components, wherein the proportion of waste is controlled at 48%, a slag former, a refining agent and a liquid refining agent are used for smelting, the refining gas is nitrogen, and the dosage of the refining agent is: 1.6kg/t aluminium, glycerol dosage: 0.15kg/t aluminum, the smelting furnace adopts aluminum-silicon alloy for Si supplement, and the furnace reversing temperature is 750 ℃.
(2) And (3) pouring the ingot into a standing furnace, keeping the temperature of the ingot at 746 ℃, performing secondary refining in the standing furnace, wherein the refining uses glycerol, the refining gas is nitrogen, no cold plate is added in each refining, an aluminum-strontium intermediate alloy is added for modification treatment during refining, the strontium content needs to be controlled at 0.041%, and the ingot is kept standing for 11 minutes after feeding.
(3) And after the static furnace treatment, adding an aluminum-titanium-boron wire when the melt passes through the launder to carry out grain refinement treatment, wherein the adding speed of the titanium wire is 18 Hz.
(4) After the titanium wire is added, degassing and filtering treatment are further carried out, the temperature of a degassing box is 720 ℃, the pressure of argon is 0.21MPa, and the flow of nitrogen is 1.9m3And/h, the rotor speed is 260rpm, the temperature of the filter box is 710 ℃, and secondary filtration is carried out, wherein the mesh number of filter sheets is 40 meshes and 50 meshes respectively.
(5) And (3) feeding the filtered melt into a front box, controlling the temperature of the front box to be 670 ℃, and carrying out cast rolling blank production through a casting and rolling machine, wherein the speed of a main machine is 545mm/min, the length of a cast rolling area is 50mm, the roll gap is set to be 5.58mm, the convexity of a roll is 0.28mm, and the thickness of a cast rolling blank finished product is 6.81 mm.
(6) The cast-rolled blank enters a high-temperature annealing furnace for carrying out homogenization annealing, and the process comprises the following steps: quickly raising the temperature of the furnace gas to 520 ℃, preserving the heat for 13h, preserving the heat for 3h at the temperature of the converter gas of 500 ℃, and discharging and cooling.
(7) The thickness of the finished product of the casting blank material after high-temperature homogenization is further subjected to rough rolling and intermediate rolling, the thickness of the finished product is controlled by oil, the outlet thickness is confirmed to reach the target thickness before and after the rolling of the finished product, the rolling passes are cooled every three times according to the thickness of 6.8-5.6-4.5-3.2-2.2-1.5-1.0-0.7-0.5 mm.
(8) And (5) feeding the material with the thickness of 0.5mm after the middle rolling into a slitting machine for trimming.
(9) And (4) feeding the trimmed materials to a withdrawal and straightening machine to withdraw and correct the plate type and cleaning the surface according to the cleaning standard of the PCB product.
(10) And (3) annealing the finished product finally after the material is subjected to pulling, straightening and cleaning, wherein the annealing process of the finished product is as follows: heating the furnace gas to 260 ℃ for 1h, preserving heat for 3h for removing oil, heating to 450 ℃ and preserving heat for 8h, and preserving heat for 390 ℃ of converter gas for 2h, and discharging and cooling.
The analysis and detection of the 4343 aluminum alloy skin material for the brazing composite material produced in the example show that: the finished product has good version, no edge wave and no middle wave, etc.; the surface oil carrying quantity is extremely low, the dyne value is higher than 50, and compared with the dyne value level of the material prepared by a hot rolling method, the surface oil carrying quantity is lower; the actual measurement shows that the tensile strength is 132MPa, the elongation is 14 percent, the tensile strength is close to that of a material prepared by a hot rolling method, the elongation is about 5 percent higher, and the use requirement is met; metallographic structure observation shows that no coarse primary crystal silicon phase exists in the finished skin material, the measured statistical average size of silicon particles is 16 microns and the silicon particles are uniformly distributed, and the silicon particles are smaller than the silicon particles of 15-35 microns prepared by a hot rolling method; after the skin materials are further compounded into the composite material, the composite material has uniform fluidity and full welding line in the brazing process, and has no bad conditions of insufficient welding, local fusion penetration and the like. Compared with the traditional method for producing the skin material by semi-continuous casting ingot casting and hot rolling cross shear, the method obviously improves the yield and the production efficiency while ensuring good use performance.
The present invention has been disclosed in terms of the preferred embodiment, but is not intended to be limited to the embodiment, and all technical solutions obtained by substituting or converting equivalents thereof fall within the scope of the present invention.
Claims (10)
1. The manufacturing method of the 4343 aluminum alloy skin material for the brazing composite material is characterized by comprising the following steps of:
proportioning according to the component proportion of 4343-grade aluminum alloy, adding a slag former and a refining agent for smelting, then refining by adopting glycerol in a standing furnace, adding an aluminum-strontium intermediate alloy for modification during refining, adding an aluminum-titanium-boron wire for grain refinement, degassing, filtering, casting and rolling, carrying out high-temperature homogenization annealing, rolling the casting blank material subjected to high-temperature homogenization into the thickness of a skin material finished product through rough rolling and medium rolling, longitudinally shearing edges, straightening, cleaning and annealing the finished product.
2. The method of manufacturing 4343 Al alloy skin material for brazing composite material as claimed in claim 1, wherein the refining gas is nitrogen, and the amount of refining agent is: 1.2-1.8kg/t aluminum.
3. The method of claim 1, wherein the Al-Si alloy is added to the melting furnace, and the annealing temperature is 740-755 ℃.
4. The method for manufacturing 4343 aluminum alloy skin material for brazing composite material as claimed in claim 1, wherein the holding temperature of the standing furnace is 730-: 0.13-0.19kg/t aluminum, no cold plate is added for each refining.
5. The method of manufacturing 4343A skin material for a brazing composite material according to claim 1, wherein the aluminum-strontium master alloy is added for modification during refining to have a strontium content of 0.02 to 0.05%, and left to stand for 6 to 15 minutes after the addition of the material.
6. The method of claim 1, wherein the Al-Ti-B wire is fed at a rate of 18-22 Hz.
7. The method of claim 1, wherein the temperature of the degassing tank is 700-3And/h, the rotor speed is 225-275rpm, the temperature of the filter box is 700-720 ℃, and secondary filtration is carried out, wherein the mesh number of the filter sheets is 40 and 50 meshes respectively.
8. The method for manufacturing 4343 Al-alloy skin material for brazing composite material as defined in claim 1, wherein the temperature of the casting and rolling front box is controlled at 665-.
9. The method for manufacturing the 4343 aluminum alloy skin material for the brazing composite material according to claim 1, wherein the homogenizing annealing process comprises: quickly raising the temperature of the furnace gas to 520 ℃, preserving the heat for 12-17h, preserving the heat for 3-5h at the temperature of the converter gas of 500 ℃, and discharging and cooling.
10. The manufacturing method of the 4343 aluminum alloy skin material for the brazing composite material as claimed in claim 1, wherein the annealing process of the finished product is as follows: heating the furnace gas to 260 ℃ for 1h, preserving heat for 3h to remove oil, heating to 450 ℃ again, preserving heat for 7-11h, preserving heat of the converter gas at 390 ℃ for 2-4h, discharging and cooling, and checking the size and distribution of finished silicon particles, wherein the finished silicon particles are required to be free of coarse primary crystal silicon and fine and uniformly distributed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114836657A (en) * | 2022-04-29 | 2022-08-02 | 河南明泰铝业股份有限公司 | 4017 aluminum alloy sheet for novel coating material and preparation method thereof |
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| CN101220430A (en) * | 2008-01-31 | 2008-07-16 | 河南永顺铝业有限公司 | Aluminum alloy foil material for brazing type heat exchanger and production process |
| CN108823440A (en) * | 2018-06-27 | 2018-11-16 | 江苏大学 | A kind of preparation method and application of hypoeutectic al-si alloy slab |
| CN111347735A (en) * | 2020-04-03 | 2020-06-30 | 江苏鼎胜新能源材料股份有限公司 | Composite board for brazing and manufacturing method thereof |
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| CN114836657B (en) * | 2022-04-29 | 2023-07-18 | 河南明泰铝业股份有限公司 | 4017 aluminum alloy sheet for coating material and preparation method thereof |
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