CN111647781A - Radiator processing technology - Google Patents
Radiator processing technology Download PDFInfo
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- CN111647781A CN111647781A CN202010358382.0A CN202010358382A CN111647781A CN 111647781 A CN111647781 A CN 111647781A CN 202010358382 A CN202010358382 A CN 202010358382A CN 111647781 A CN111647781 A CN 111647781A
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- slag
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- aluminum melt
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- processing technology
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- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 107
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000002893 slag Substances 0.000 claims abstract description 83
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 52
- 238000011282 treatment Methods 0.000 claims abstract description 39
- 238000004321 preservation Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000004381 surface treatment Methods 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 238000000746 purification Methods 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 34
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 19
- 238000005238 degreasing Methods 0.000 claims description 19
- 150000002910 rare earth metals Chemical class 0.000 claims description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 17
- 239000002518 antifoaming agent Substances 0.000 claims description 16
- 229910004883 Na2SiF6 Inorganic materials 0.000 claims description 14
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 14
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 14
- 238000005237 degreasing agent Methods 0.000 claims description 14
- 239000013527 degreasing agent Substances 0.000 claims description 14
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 14
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 14
- 239000011780 sodium chloride Substances 0.000 claims description 14
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000001103 potassium chloride Substances 0.000 claims description 12
- 235000011164 potassium chloride Nutrition 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 20
- 239000011734 sodium Substances 0.000 description 13
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 239000000155 melt Substances 0.000 description 9
- 230000004907 flux Effects 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000274 aluminium melt Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- -1 rare earth hydride Chemical class 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- JWOZORSLWHFOEI-UHFFFAOYSA-N [O--].[O--].[Mg++].[Mn++] Chemical compound [O--].[O--].[Mg++].[Mn++] JWOZORSLWHFOEI-UHFFFAOYSA-N 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a radiator processing technology, which belongs to the technical field of radiator section bar processing, and the technical scheme is characterized by comprising the following steps: (1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists; (2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min; (3) pouring; pouring at 655-685 ℃; (4) and (6) surface treatment of the profile. The effects of reducing the slag and pinhole rate in the aluminum profile and improving the mechanical property of the aluminum profile are achieved.
Description
Technical Field
The invention relates to the technical field of radiator section bar processing, in particular to a radiator processing technology.
Background
The aluminum alloy section has good ductility, surface processing treatment is easy to carry out, and the aluminum alloy section has excellent heat conduction performance, higher millennium ancient city, good corrosion resistance, moisture resistance, weather resistance and other performances, so the quality requirement on the aluminum alloy is very strict, the content of oxide films and inclusions in an aluminum melt is strictly controlled, and the lower the hydrogen content is, the better the hydrogen content is, because harmful substances such as hydrogen, oxide films and inclusions existing after the aluminum alloy is refined easily form defects such as air holes, looseness, inclusions and the like in the aluminum alloy casting, the physical performance, the mechanical performance and the heat conduction performance of the aluminum alloy casting are directly influenced, and meanwhile, the quality defects such as roughness, bubbles, cracks and the like of the surface of a product can be caused in the subsequent pouring process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a radiator processing technology, which achieves the effects of reducing the slag and pinhole rate in an aluminum profile and improving the mechanical property of the aluminum profile.
The technical purpose of the invention is realized by the following technical scheme:
a processing technology of a radiator comprises the following steps:
(1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists;
(2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min;
(3) pouring; pouring at 655-685 ℃;
(4) and (6) surface treatment of the profile.
By adopting the technical scheme, because gas, non-metallic inclusions and other harmful metals exist in the melt to different degrees, the defects of looseness, slag inclusion, pores and the like of the cast ingot are often caused, and the mechanical property, the processing property, the heat conducting property, the corrosion resistance and the surface quality of the aluminum material are greatly influenced.
After the slag removing agent is added into the aluminum melt, the slag removing agent reacts with the slag in the aluminum melt, so that the slag is separated from an aluminum casting, meanwhile, the slag floats to the surface of the aluminum melt along with the flux, the slag is effectively removed, then, the covering agent is added, a large amount of air is guaranteed to be involved in the aluminum melt, and accordingly, the slag removing and hydrogen removing efficiency is guaranteed.
In the heat preservation treatment process, the slag removing agent is added, so that slag inclusion and hydrogen in the aluminum melt can be further removed, the influence of slag inclusion and impurity gas on the quality of the aluminum profile is reduced, and the aluminum profile radiator is guaranteed to have good mechanical performance and heat conductivity. In addition, under the conditions that the smelting temperature is 675-725 ℃, the heat preservation treatment temperature is 655-685 and the pouring temperature is 655-685, the aluminum profile slag inclusion and the air holes caused by the fact that the aluminum profile slag inclusion or the air holes are not in time due to the fact that the aluminum profile slag inclusion or the air holes are formed in the aluminum melt due to the fact that the aluminum profile slag inclusion or the air holes are formed in the aluminum profile melt due to the fact that the aluminum profile slag inclusion or the air holes are not in time when the aluminum.
In conclusion, the slag removing agent and the covering agent are added in the aluminum melt smelting process, and the slag removing agent is added in the heat preservation treatment process, so that the slag and the gas in the aluminum profile are effectively removed, the temperature is controlled, the regeneration probability of the slag and the gas is reduced, the cost is saved, and the heat conductivity of the aluminum profile is improved.
The invention is further provided that the slag remover in the step (1) comprises Na2SiF6、Na2AlF6，Na2SiF6With Na2AlF6The weight ratio of (0.6-1.0): (0.8-1.3).
By adopting the technical scheme, Na2SiF6Has the effects of heating and refining, and can convert Na into Na2SiF6With Na2AlF6The aluminum alloy is matched for use, so that the non-metallic inclusion can be wetted and adsorbed on the surface of a flux liquid drop, and the flux can float upwards in the melt due to the fact that the density of the flux is lower than that of the melt, so that the inclusion is carried to float on the surface of the melt, the impurity content in the aluminum melt can be effectively removed, and the appearance quality, the mechanical property and the heat conductivity of the aluminum profile are guaranteed;
and Na2AlF6The aluminum oxide can be strongly adsorbed, the melting point is higher than 1000 ℃, and the interfacial tension between the aluminum melt and the aluminum melt is large, so that the separability between the aluminothermic melt and the molten slag can be improved, the molten slag in the aluminum melt can be more easily cleaned, the slag inclusion amount and the air hole amount contained in a finished product are reduced, and the mechanical property and the heat conductivity of the finished product are ensured.
The invention further provides that the covering agent in the step (1) comprises calcium fluoride, magnesium fluoride and carnallite, and the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is (0.5-0.7): (0.3-0.6):1.
By adopting the technical scheme, the calcium fluoride, the magnesium fluoride and the carnallite can be uniformly dispersed on the surface of the melt in a matching way, so that the oxidation of a molten pool can be prevented, the entrainment of gas is reduced, the gathered metal drops form larger liquid clusters and then are deposited back to the molten pool, and the effect of further removing slag inclusion in the melt is achieved.
The invention is further configured that the deslagging agent in the step (2) comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is (2.5-3): (2-2.5): (1.2-1.5):1.
Through adopting above-mentioned technical scheme, the slagging-off agent that sodium chloride, potassium chloride, tombarthite and calcium carbonate were made not only has fine coverage guard action, and the fusing point of slagging-off agent is less than the fusing point of pure aluminium and the temperature of smelting in this application, and along with the fixed of slagging-off agent flux to hydrogen and the going on of deoxidation reaction process, the flux film will also be more and more compact to in effectively preventing the external air from being drawn into the aluminium melt, thereby effectively preventing the increase of the amount of hydrogen atom in the aluminium melt. In addition, the rare earth component can react with aluminum, the separated rare earth simple substance has stronger affinity with hydrogen in the melt, stable rare earth hydride which is dissolved in the aluminum melt is easily formed, the hydrogen content in the melt is reduced, meanwhile, the rare earth simple substance and aluminum oxide inclusion react to generate rare earth oxide, the rare earth oxide has larger specific gravity and can quickly sink to the bottom, thereby being convenient for removing the inclusion slag in the melt, improving the slag removal and hydrogen removal efficiency, reducing the number of the inclusion slag and air holes in the aluminum profile, and ensuring the mechanical property and the heat conduction property of the aluminum profile radiator.
The invention is further configured that the surface treatment process of the sectional material in the step (4) comprises the following steps of degreasing, cleaning, washing, passivating, washing and drying.
Through adopting above-mentioned technical scheme, carry out degrease washing, passivation with the aluminium alloy after handling, can effectively get rid of the debris on aluminium alloy surface for aluminium alloy surface turns into the difficult state of oxidizing, thereby delays the corrosion rate of metal, improves aluminium alloy radiator's life.
The invention is further set that in the degreasing and cleaning step, the concentration of the degreasing agent in water is 4-6%, and the treatment temperature is 40-60 ℃.
The invention is further set that a defoaming agent is also added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is (0.2-0.4): 1.
by adopting the technical scheme, when no defoaming agent exists in the degreasing solution, the foam is easily generated in the cleaning process of the section bar, the contact between the degreasing solution and the section bar can be influenced by the existence of the foam, so that the grease removing effect on the surface of the section bar is poor, after the defoaming agent is added into the degreasing cleaning solution, the generation of bubbles in the degreasing cleaning solution can be inhibited, the surface tension is reduced, the degreasing cleaning solution can be more fully contacted with the section bar, and the cleaning efficiency of the grease on the surface of the section bar is improved,
the invention is further set that in the passivation treatment step, the concentration of the passivation treatment liquid is 4-6%, and the treatment temperature is 40-60 ℃.
In conclusion, the invention has the following beneficial effects:
1. the slag removing agent, the covering agent and the slag removing agent are used in a matched manner, so that the adsorption capacity of the slag removing agent, the covering agent and the slag removing agent is effectively improved, and the separation effect of the slag and the aluminum melt is also improved, so that the finally obtained slag is low in aluminum liquid content and light in weight, and the mechanical property of the aluminum profile is also effectively improved;
2. in the surface treatment process of the aluminum profile, the grease content on the surface of the aluminum profile is effectively reduced, so that the heat-conducting property of the aluminum profile is improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
In the following examples and comparative examples:
the passivator is purchased from Shanghai Pa Ka Rice-flour noodles Co., Ltd, and has the model number of CT-3796M;
the degreasing agent is purchased from Huayang-Ensai Co Ltd, and has the model number of PWC-401;
the defoaming agent is an organic silicon defoaming agent and is purchased from Shanghai Mao congratulations chemical technology Co., Ltd;
the rare earth is purchased from Hengtai rare earth science and technology limited company of Ganzhou city, and the main components are La and Ce;
the amount of the aluminum melt was 400 kg;
the mass percentage of each element of the aluminum melt is shown in the following table, and the unit percent
| Manganese oxide | Magnesium alloy | Copper (Cu) | Zinc | Silicon | Iron | Nickel (II) | Titanium (IV) | Lead (II) | Tin (Sn) | Aluminium |
| 0.167 | 0.1802 | 1.825 | 0.7464 | 10.45 | 0.7685 | 0.0373 | 0.0316 | 0.0320 | 0.0172 | Balance of |
Example 1
A processing technology of a radiator comprises the following steps:
(1) smelting an aluminum melt; adding slag remover 3 wt% of molten aluminum into the molten aluminum at 675 deg.C, stirring, treating for 10min, removing slag until no scum is presentAdding 1.1% of covering agent; wherein the slag remover comprises Na2SiF6、Na2AlF6，Na2SiF6With Na2AlF6In a weight ratio of 0.6: 0.8; the covering agent comprises calcium fluoride, magnesium fluoride and carnallite, wherein the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is 0.5: 0.3: 1;
(2) heat preservation and purification treatment; turning down the aluminum melt obtained in the step (1) and preserving heat, adding 2 per mill of slag removing agent into the aluminum melt at the temperature of 655 ℃, uniformly stirring, and removing slag after 10min of treatment; the slag removing agent comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is 2.5: 2: 1.2:1
(3) Pouring; pouring at 655 deg.C;
(4) surface treatment of the section;
the surface treatment process of the section comprises the following steps:
s1: degreasing and cleaning; the degreasing agent is added into water, the concentration of the degreasing agent in the water is 4 percent, the treatment temperature of the aluminum profile is 40 DEG C
S2: washing with water;
s3: passivating; the concentration of the passivating agent in water is 4 percent, and the processing temperature of the aluminum profile is 40 DEG C
S4: washing with water;
s5: and (5) drying.
Example 2
A processing technology of a radiator comprises the following steps:
(1) smelting an aluminum melt; adding a slag remover accounting for 5 percent of the weight of the aluminum melt into the molten aluminum melt at the temperature of 700 ℃, uniformly stirring, removing slag after 10min of treatment, and adding a covering agent accounting for 1.3 percent of the weight of the molten aluminum melt until no scum exists; wherein the slag remover comprises Na2SiF6、Na2AlF6，Na2SiF6With Na2AlF6In a weight ratio of 0.8: 1.1; the covering agent comprises calcium fluoride, magnesium fluoride and carnallite, wherein the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is 0.6: 0.5: 1;
(2) heat preservation and purification treatment; turning down the aluminum melt obtained in the step (1) for heat preservation, adding 3 per mill of slag removing agent into the aluminum melt at the temperature of 670 ℃, uniformly stirring, and removing slag after processing for 15 min; the slag removing agent comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is 2.7: 2.3: 1.4:1
(3) Pouring; pouring at 670 deg.C;
(4) surface treatment of the section;
the surface treatment process of the section comprises the following steps:
s1: degreasing and cleaning; the degreasing agent is added into water, the concentration of the degreasing agent in the water is 5 percent, the treatment temperature of the aluminum profile is 50 DEG C
S2: washing with water;
s3: passivating; passivating agent in water, the concentration of passivating treatment liquid is 5%, and the treatment temperature of aluminium profile is 50 deg.C
S4: washing with water;
s5: and (5) drying.
Example 3
A processing technology of a radiator comprises the following steps:
(1) smelting an aluminum melt; adding a slag remover accounting for 7 percent of the weight of the aluminum melt into the molten aluminum melt at the temperature of 725 ℃, uniformly stirring, carrying out treatment for 15min, removing slag, and adding a covering agent accounting for 1.5 percent of the weight of the molten aluminum melt until no scum exists; wherein the slag remover comprises Na2SiF6、Na2AlF6，Na2SiF6With Na2AlF6In a weight ratio of 1.0: 1.3; the covering agent comprises calcium fluoride, magnesium fluoride and carnallite, wherein the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is 0.7: 0.6: 1;
(2) heat preservation and purification treatment; performing furnace reversing and heat preservation on the aluminum melt obtained in the step (1), adding 5 per mill of a deslagging agent into the aluminum melt at the temperature of 685 ℃, uniformly stirring, and deslagging after 20min treatment; the slag removing agent comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is 3: 2.5: 1.5:1
(3) Pouring; pouring at 685 deg.C;
(4) surface treatment of the section;
the surface treatment process of the section comprises the following steps:
s1: degreasing and cleaning; the degreasing agent is added into water, the concentration of the degreasing agent in the water is 6 percent, the treatment temperature of the aluminum profile is 60 DEG C
S2: washing with water;
s3: passivating; passivating agent in water, the concentration of passivating treatment liquid is 4-6%, and the treatment temperature of aluminium section is 60 deg.C
S4: washing with water;
s5: and (5) drying.
Example 4
A radiator processing technology, which is different from the embodiment 2 in that in the step S1, a defoaming agent is further added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is 0.2: 1.
example 5
A radiator processing technology, which is different from the embodiment 2 in that in the step S1, a defoaming agent is further added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is 0.3: 1.
example 6
A radiator processing technology, which is different from the embodiment 2 in that in the step S1, a defoaming agent is further added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is 0.4: 1.
comparative example 1
The difference from the example 2 is that the slag remover in the step (1) only adopts Na2SiF6。
Comparative example 2
The difference from example 2 is that only carnallite was used as the covering agent in step (1).
Comparative example 3
The difference from example 2 is that only calcium fluoride and magnesium fluoride are used as the covering agent in step (1), and the weight ratio of calcium fluoride to magnesium fluoride is 0.5: 0.3.
Comparative example 4
The difference from example 2 is that the slag removing agent in step (2) comprises rare earth and calcium carbonate, and the weight ratio of rare earth to calcium carbonate is 1.5: 1.
Comparative example 5
The difference from example 2 is that the deslagging agent in step (2) comprises sodium chloride and calcium carbonate in a weight ratio of 3: 1.
Comparative example 6
The difference from example 2 is that the melting temperature in step (1) was 730 ℃, the temperature of the heat-insulating treatment in step (2) was 700 ℃, and the temperature at the time of pouring in step (3) was 700 ℃.
Performance detection
Mechanical properties and heat conductivity of the aluminum profiles obtained in examples 1 to 6 and comparative examples 1 to 6 were measured, and the results are shown in table 1.
Table 1 aluminium section bar test result table
| Item | Tensile strength/Mpa | Elongation/percent | Yield strength/Mpa | K is involved in heat conductivity coefficient/W/m | Total weight of slag/kg | Pinhole Rate/% |
| Example 1 | 308 | 14.2 | 265 | 228 | 3.4 | 3.6 |
| Example 2 | 317 | 11.8 | 274 | 235 | 2.2 | 2.5 |
| Example 3 | 314 | 12.6 | 270 | 230 | 2.8 | 3.1 |
| Example 4 | 318 | 11.8 | 274 | 239 | 2.2 | 2.5 |
| Example 5 | 317 | 11.8 | 275 | 245 | 2.2 | 2.5 |
| Example 6 | 319 | 11.8 | 275 | 241 | 2.2 | 2.5 |
| Comparative example 1 | 298 | 15.4 | 251 | 201 | 5.6 | 6.7 |
| Comparative example 2 | 295 | 15.7 | 253 | 197 | 6.3 | 6.5 |
| Comparative example 3 | 301 | 15.2 | 257 | 205 | 6.2 | 6.1 |
| Comparative example 4 | 289 | 16.3 | 246 | 192 | 6.8 | 6.6 |
| Comparative example 5 | 290 | 16.1 | 244 | 190 | 6.5 | 6.3 |
| Comparative example 6 | 294 | 15.7 | 248 | 193 | 4.6 | 3.2 |
As can be seen from table 1:
in examples 1-3, the tensile strength, the yield strength and the thermal conductivity in example 2 are all better than those in examples 1 and 3, and the total weight of slag and the pinhole rate in example 2 are all less than those in examples 1 and 3, which illustrates that the processing technology and the contents of slag cleaning agent, covering agent and deslagging agent in example 2 are helpful for removing hydrogen and slag in aluminum melt, and the content of slag in example 2 is small, which illustrates that the slag and aluminum melt are poor in separability, therefore, the processing technology in example 2 of the present application is helpful for fully separating slag from aluminum melt, thereby improving the mechanical strength and the thermal conductivity of the aluminum profile;
compared with the embodiment 2, the embodiment 4-6 has no influence on the tensile strength, the yield strength and the elongation, the total weight of slag and the pinhole rate by adding the defoaming agent into the degreasing cleaning solution, but has influence on the heat-conducting property of the aluminum profile, mainly because the aluminum profile is not in good contact with the degreasing cleaning solution without the defoaming agent, grease on the surface of the aluminum profile cannot be sufficiently removed, and the heat-conducting property of the aluminum profile is reduced;
comparative example 1 compared with example 2, when the slag remover only adopts Na2SiF6In the process, the tensile strength, the yield strength, the elongation and the thermal conductivity coefficient in the comparative example 1 are lower than those in the example 2, and the total weight of the slag and the pinhole rate in the comparative example 1 are higher than those in the comparative example 1, so that when only one slag remover is adopted, the separation performance of the slag and the aluminum melt is poor, the dehydrogenation rate is low, the pinhole rate in the aluminum profile is improved, and the mechanical property is correspondingly reduced, therefore, Na in the application can be used for solving the problems that the tensile strength, the yield strength, the elongation and the thermal conductivity coefficient are lower than those in the example 2, and the total weight of the2SiF6With Na2AlF6The mechanical property of the aluminum profile can be effectively improved by matching the aluminum profile and the molten slag and the aluminum melt can be fully separated, so that the dehydrogenation rate is improved;
compared with the example 2, the mechanical property and the thermal conductivity of the comparative examples 2 to 3 are lower than those of the example 2, and the total weight of the slag and the pinhole rate of the comparative examples 2 to 3 are higher than those of the slag and the pinhole rate of the example 2, so that the calcium fluoride, the magnesium fluoride and the carnallite are used together, air can be effectively prevented from being involved in the aluminum melt, and the aluminum melt is further purified, so that the quality of the aluminum profile is improved;
compared with the embodiment 2, when the deslagging agent only adopts rare earth and calcium carbonate or sodium chloride and calcium carbonate, various performances of the obtained aluminum profile are lower than those of the embodiment 2, which shows that the sodium chloride, potassium chloride, rare earth and calcium carbonate in the deslagging agent are matched for use, so that secondary deslagging can be performed, and the quality and the heat conductivity of the aluminum profile can be improved;
compared with the embodiment 2, when the melting temperature, the heat preservation treatment temperature and the pouring temperature are too high, all performances of the aluminum profile are reduced, and therefore, the treatment temperature of each step can effectively improve the mechanical property and the heat conducting property of the aluminum profile.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The processing technology of the radiator is characterized by comprising the following steps:
(1) smelting an aluminum melt; adding a slag removing agent accounting for 3-7% of the weight of the aluminum melt into the molten aluminum melt at 675-725 ℃, uniformly stirring, carrying out treatment for 10-15min, removing slag, and adding a covering agent accounting for 1.1-1.5% of the weight of the aluminum melt until no scum exists;
(2) heat preservation and purification treatment; pouring the aluminum melt obtained in the step (1) for heat preservation, adding 2-5 per mill of slag removing agent into the aluminum melt at the temperature of 655-685 ℃, uniformly stirring, and removing slag after treatment for 10-20 min;
(3) pouring; pouring at 655-685 ℃;
(4) and (6) surface treatment of the profile.
2. The heat sink processing technology according to claim 1, wherein: the slag remover in the step (1) comprises Na2SiF6、Na2AlF6，Na2SiF6The weight ratio of the Na2AlF6 is (0.6-1.0): (0.8-1.3).
3. The heat sink processing technology according to claim 1, wherein: the covering agent in the step (1) comprises calcium fluoride, magnesium fluoride and carnallite, and the weight ratio of the calcium fluoride to the magnesium fluoride to the carnallite is (0.5-0.7): (0.3-0.6):1.
4. The heat sink processing technology according to claim 1, wherein: the slag removing agent in the step (2) comprises sodium chloride, potassium chloride, rare earth and calcium carbonate, wherein the weight ratio of the sodium chloride to the potassium chloride to the rare earth to the calcium carbonate is (2.5-3): (2-2.5): (1.2-1.5):1.
5. The heat sink processing technology according to claim 1, wherein: the surface treatment process of the sectional material in the step (4) comprises degreasing cleaning, washing, passivation treatment, washing and drying.
6. The heat sink processing technology according to claim 1, wherein: in the degreasing and cleaning step, the concentration of the degreasing agent in water is 4-6%, and the treatment temperature is 40-60 ℃.
7. The heat sink processing technology according to claim 1, wherein: and a defoaming agent is also added into the degreasing cleaning solution, and the ratio of the concentration of the defoaming agent in water to the concentration of the degreasing agent in water is (0.2-0.4): 1.
8. the heat sink processing technology according to claim 1, wherein: in the passivation treatment step, the concentration of the passivation treatment liquid is 4-6%, and the treatment temperature is 40-60 ℃.
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| CN112593127A (en) * | 2020-12-14 | 2021-04-02 | 东北轻合金有限责任公司 | Cast aluminum alloy and preparation method thereof |
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