CN103103372B - The smelting preparation method of a kind of anti-impact pressure aluminium alloy extrusions - Google Patents
The smelting preparation method of a kind of anti-impact pressure aluminium alloy extrusions Download PDFInfo
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- CN103103372B CN103103372B CN201210530654.6A CN201210530654A CN103103372B CN 103103372 B CN103103372 B CN 103103372B CN 201210530654 A CN201210530654 A CN 201210530654A CN 103103372 B CN103103372 B CN 103103372B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 80
- 238000001125 extrusion Methods 0.000 title claims abstract description 37
- 238000003723 Smelting Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000004411 aluminium Substances 0.000 claims abstract description 17
- 238000010792 warming Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 4
- 239000010881 fly ash Substances 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 238000003892 spreading Methods 0.000 claims abstract description 4
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 4
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 27
- 238000010791 quenching Methods 0.000 claims description 20
- 238000007670 refining Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 241000196324 Embryophyta Species 0.000 claims description 15
- 239000002956 ash Substances 0.000 claims description 15
- 230000000171 quenching effect Effects 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 12
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 11
- 229960000892 attapulgite Drugs 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910052625 palygorskite Inorganic materials 0.000 claims description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000005255 carburizing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 235000015320 potassium carbonate Nutrition 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 6
- 229940001516 sodium nitrate Drugs 0.000 claims description 6
- 235000010344 sodium nitrate Nutrition 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910001339 C alloy Inorganic materials 0.000 claims description 5
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 238000009692 water atomization Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- ZNRSXPDDVNZGEN-UHFFFAOYSA-K trisodium;chloride;sulfate Chemical compound [Na+].[Na+].[Na+].[Cl-].[O-]S([O-])(=O)=O ZNRSXPDDVNZGEN-UHFFFAOYSA-K 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 235000011147 magnesium chloride Nutrition 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229920001617 Vinyon Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Abstract
The present invention discloses the smelting preparation method of a kind of anti-impact pressure aluminium alloy extrusions, include following operation steps: aluminium alloy melt processed: by following raw materials in part by weight: 55-65? the discarded aluminum products of A356 aluminium ingot, 32-40,6-10 norbide, 5-10 nano ceramic powder carry out proportioning, the fineness of norbide is 5-8 ��m, above-mentioned raw materials is added smelting furnace, be warming up to furnace charge start softening under when collapsing, spreading last layer insulating covering agent to cover to molten liquid surface, described insulating covering agent is made up of following parts by weight of component: 10-20 part CaO, 10-25 part AL2O3, 35-45 part SiO2, 12-30 part C, 12-23 part flyash; Feed proportioning of the present invention with the addition of useless aluminum, be conducive to aluminium section bar stable performance, decrease and the possibility not having the Effect of Materials aluminium section bar quality of detection occurs when aluminium liquid is smelted; Formula is optimized further, adds intensity and the hardness of aluminium alloy, be conducive to improving the over-all properties of aluminium alloy extrusions; Aluminium alloy section surface is carried out chromate treating, it is to increase the resistance to corrosion of aluminium alloy section surface oxide film and the bonding force of aluminium alloy extrusions and coating.
Description
Technical field
The present invention relates to the smelting preparation method of a kind of anti-impact pressure aluminium alloy extrusions, belong to aluminum alloy materials processing technique field.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, widely applies in aviation, space flight, automobile, machinofacture, boats and ships. Along with develop rapidly that is scientific and technical in recent years and industrial economy, the demand of aluminium alloy welding structural element day by day being increased, the Research on Weldability making aluminium alloy is also thereupon deeply. The widespread use of aluminium alloy facilitates the development of aluminum alloy solder technology, and the development of welding technique simultaneously has expanded again the Application Areas of aluminium alloy, the therefore welding technique of aluminium alloy just one of focus becoming research. Aluminium-plastic panel is by through surface treatment and with 3003 alumals of coating baking vanish, 5005 aluminum magnesium alloy sheet materials as surface, PE plastics process, as core layer, macromolecule felted-membrane, the type material being composited through series of process. It had both remained the main characteristic of former composition material (aluminium alloy plate, nonmetal vinyon), overcomes again the deficiency of former composition material, and then obtains the material character of numerous excellence. Product performance: the characteristics such as gorgeous colorful decoration, wound weather-proof, anti-corrosion, resistance to are hit, prevented fires, protection against the tide, sound insulation, heat insulation, shock resistance, light weight, easily machine-shaping, easily carrying and installation.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, it is provided that the smelting preparation method of a kind of anti-impact pressure aluminium alloy extrusions, it is to increase the over-all properties of aluminium alloy extrusions.
The technical solution used in the present invention is as follows:
A smelting preparation method for anti-impact pressure aluminium alloy extrusions, includes following operation steps:
(1) aluminium alloy melt processed:
By following raw materials in part by weight: the discarded aluminum products of 55-65A356 aluminium ingot, 32-40,6-10 norbide, 5-10 nano ceramic powder carry out proportioning, above-mentioned raw materials is added smelting furnace, be warming up to furnace charge start softening under when collapsing, spreading last layer insulating covering agent to cover to molten liquid surface, described insulating covering agent is made up of following parts by weight of component: 10-20 part CaO, 10-25 part AL2O3, 35-45 part SiO2, 12-30 part charcoal, 12-23 part flyash;
Add magnesium ingot again, fusing; Magnesium weight is the 1-5% of raw material aluminium weight;
(2) refining treatment:
Utilize refining agent that aluminium alloy melt is carried out refining treatment, when aluminium alloy melt is through refining treatment, and after clawing surface scum, melt can be infused into standing furnace, aluminium alloy melt is warming up to 600-650 DEG C and keeps 25-30min after entering standing furnace, then utilize argon gas to take the hydrogen in aluminium alloy melt and fine impurities to surface, thus reduce the hydrogen richness in aluminium liquid, 20-22Kg sodium removing agent is added again by every ton of aluminium alloy melt, described sodium removing agent is made up of following parts by weight of component: 50-60 Repone K, 30-40 active calcium carbonate powder, 2-10 chlordeneization two carbon, after standing furnace, casting obtains aluminum alloy round casting rod again, described refining agent obtains by following raw materials in part by weight: 7-9 Repone K, 4-6 plant ash, 3-4 diatomite, 2-3 quartz sand nanometer powder, 2-3 magnesium chloride, 4-6 Calcium Fluoride (Fluorspan), 3-5 SODIUMNITRATE, 5-8 Graphite Powder 99, 8-10 Sodium Silicofluoride, 3-5 sodium sulfate, 5-8 aluminum chloride, 3-5 salt of wormwood, 8-10 attapulgite, 5-8NaBF4, 3-5 sodium-chlor, 5-8 sodium carbonate, 8-10Na2TiF6, 5-8NaF; Join after the plant ash of above-mentioned weight part is mixed with diatomite in (0.8��1.2) g/L potassium permanganate solution and soak, remove impurity, then filtration washing is neutral, 400-450 DEG C of temperature lower calcination 1 hour, it is ground to powder again, finally adds quartz sand nanometer powder, magnesium chloride and mix in the lump and obtain modification plant ash;
Described refining agent preparation method is as follows:
A, the attapulgite 10-15% sulfuric acid of above-mentioned weight part is soaked 3-4 hour, deionized water wash, then soak 3-4 hour with 10-12% sodium hydroxide solution, then with deionized water wash to neutral, then at 500-530 DEG C, calcine 2-3 hour, pulverize into nanometer powder;
B, the Repone K by above-mentioned weight part, sodium-chlor, sodium sulfate, salt of wormwood, SODIUMNITRATE, attapulgite are added to the water, add the sodium laurylsulfate of attapulgite weight 2-3% again, the average of 1-2% adds, the tributyl citrate of 2-3%, 3-5% aluminum oxide, high speed 4800-5500 rev/min of stirring, obtaining dispersion liquid, dispersion liquid dewatered drying is pulverized;
C, will after other heating raw materials melting except modification plant ash particle, pulverize;
D, the material that step a, b, c obtain is added modification plant ash, binding agent mixing stir even after particulate mixtures;
(3) thermal treatment
Carrying out water atomization steam treatment after aluminum alloy round casting rod sawing, the treatment time is 4-5 hour, and temperature is 450-550 DEG C, and aluminum alloy round casting rod is sent in heat treatment furnace and is heated to 450-490 DEG C, and is incubated 2-3 hour; Then, with quenching oil cooling, the aluminum alloy round casting rod after quenching is sent in tempering stove and is heated to 300-400 DEG C, insulation 50-70min;
(4) forming process
Aluminum alloy round casting rod is heated to 450-500 DEG C, then utilizes round casting rod extrusion molding from mould that extrusion machine will heat, extrusion mould temperature 240-260 DEG C, extrusion speed 7-8 m/min; Air-cooled section bar surface temperature is to after 100-130 DEG C, putting into 1-5 DEG C of water-based hardening liquid and carry out quench treatment 6-7 minute;
(5) to aluminium alloy extrusions after alignment processes, being quenched by aluminium alloy extrusions, quenching temperature 400-500 DEG C, the type of cooling is chosen as high wind and coordinates water smoke quench cooled;
(6) within 8 hours, aluminium alloy extrusions being carried out ageing treatment after extruding terminates, aging temp is 165-185 DEG C, and soaking time is 6-8h;
(7) section bar after Wetted constructures being carried out sub-zero treatment, liquid nitrogen temperature is-125��-150 DEG C, and the time of sub-zero treatment is 2-5 hour, and the isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2��3min/mm2, the boiling water that the section bar that temperature gone back up to after sub-zero treatment room temperature puts into 100 DEG C heats 60-80 minute;
(8) temper: with heating rate, section bar shove charge is warming up to 380-400 DEG C with 20-30 DEG C per hour, is incubated 20-24 hour, then is down to 250-350 DEG C in stove with the speed of 20-30 DEG C per hour, cool to room temperature of then coming out of the stove;
(9), carburizing treatment, carburizing is by the section bar after bonderizing, is heated to 400��450 DEG C in the carburizing medium of gaseous state, hold-time 3-5h.
The fineness of described norbide is 5-8 ��m.
Described thermal treatment, carries out water atomization steam treatment after aluminum alloy round casting rod sawing, and the treatment time is 4.5 hours, and temperature is 500 DEG C, and aluminum alloy round casting rod is sent in heat treatment furnace and is heated to 480 DEG C, and is incubated 2.5 hours; Then, with quenching oil cooling, the aluminum alloy round casting rod after quenching is sent in tempering stove and is heated to 350 DEG C, insulation 60min.
Feed proportioning of the present invention with the addition of useless aluminum, owing to useless aluminum is through once smelting, its stable components, therefore inventive formulation increases useless aluminum and is conducive to aluminium section bar stable performance, decrease and the possibility not having the Effect of Materials aluminium section bar quality of detection occurs when aluminium liquid is smelted; About the usage ratio of composition in adjustment aluminium formula, formula is optimized further, adds intensity and the hardness of aluminium alloy, be conducive to improving the over-all properties of aluminium alloy extrusions; The steps such as anneal, quench treatment, alignment process, add the homogeneity of the interior tissue of aluminum and the refinement of crystal grain, substantially improve quality and the processing characteristics of aluminium alloy extrusions; Aluminium alloy section surface is carried out chromate treating, it is to increase the resistance to corrosion of aluminium alloy section surface oxide film and the bonding force of aluminium alloy extrusions and coating.
Embodiment
Below in conjunction with executing example, the invention will be further described, but is not limited to the following example.
A smelting preparation method for anti-impact pressure aluminium alloy extrusions, includes following operation steps:
(1) aluminium alloy melt processed:
Press row weight part (kilogram) raw material: 55 parts of A356 aluminium ingots, 32 parts of discarded aluminum products, 6 parts of norbides, 5 parts of nano ceramic powders carry out proportioning, the fineness of norbide is 5-8 ��m, above-mentioned raw materials is added smelting furnace, be warming up to furnace charge start softening under when collapsing, spreading last layer insulating covering agent to cover to molten liquid surface, described insulating covering agent is made up of following weight part (kilogram) component: 10 parts of CaO, 25 parts of AL2O3, 35 parts of SiO2, 12 parts of charcoal, 23 parts of flyash; Add magnesium ingot again, fusing; Magnesium weight is the 1-5% of raw material aluminium weight;
(2) refining treatment:
Utilize refining agent that aluminium alloy melt is carried out refining treatment, when aluminium alloy melt is through refining treatment, and after clawing surface scum, melt can be infused into standing furnace, aluminium alloy melt is warming up to 600-650 DEG C and keeps 25-30min after entering standing furnace, then utilize argon gas to take the hydrogen in aluminium alloy melt and fine impurities to surface, thus reduce the hydrogen richness in aluminium liquid; 20-22Kg sodium removing agent is added again by every ton of aluminium alloy melt, described sodium removing agent is made up of the mixing of following weight part (kilogram) component: 60 Repone K, 30 active calcium carbonate powders, 2 chlordeneization two carbon, after standing furnace, casting obtains aluminum alloy round casting rod again, and described refining agent obtains by following weight part (kilogram) raw material: 9 Repone K, 4 plant ash, 3 diatomite, 2 quartz sand nanometer powders, 2 magnesium chlorides, 6 Calcium Fluoride (Fluorspan), 5 SODIUMNITRATE, 8 Graphite Powder 99s, 10 Sodium Silicofluorides, 5 sodium sulfate, 8 aluminum chloride, 5 salt of wormwood, 8 attapulgites, 5NaBF4, 5 sodium-chlor, 8 sodium carbonate, 8Na2TiF6, 5NaF; Join after the plant ash of above-mentioned weight part is mixed with diatomite in (0.8��1.2) g/L potassium permanganate solution and soak, remove impurity, then filtration washing is neutral, 400-450 DEG C of temperature lower calcination 1 hour, it is ground to powder again, finally adds quartz sand nanometer powder, magnesium chloride and mix in the lump and obtain modification plant ash;
Described refining agent preparation method is as follows:
A, the attapulgite 10-15% sulfuric acid of above-mentioned weight part is soaked 3-4 hour, deionized water wash, then soak 3-4 hour with 10-12% sodium hydroxide solution, then with deionized water wash to neutral, then at 500-530 DEG C, calcine 2-3 hour, pulverize into nanometer powder;
B, the Repone K by above-mentioned weight part, sodium-chlor, sodium sulfate, salt of wormwood, SODIUMNITRATE, attapulgite are added to the water, add the sodium laurylsulfate of attapulgite weight 3% again, 2% average adds, the tributyl citrate of 3%, 5% aluminum oxide, high speed 4800-5500 rev/min of stirring, obtaining dispersion liquid, dispersion liquid dewatered drying is pulverized;
C, will after other heating raw materials melting except modification plant ash particle, pulverize;
D, the material that step a, b, c obtain is added modification plant ash, binding agent mixing stir even after particulate mixtures;
(3) thermal treatment
Carrying out water atomization steam treatment after aluminum alloy round casting rod sawing, the treatment time is 4.5 hours, and temperature is 500 DEG C, and aluminum alloy round casting rod is sent in heat treatment furnace and is heated to 480 DEG C, and is incubated 2.5 hours; Then, with quenching oil cooling, the aluminum alloy round casting rod after quenching is sent in tempering stove and is heated to 350 DEG C, insulation 60min;
(4) forming process
Aluminum alloy round casting rod is heated to 450-500 DEG C, then utilizes round casting rod extrusion molding from mould that extrusion machine will heat, extrusion mould temperature 240-260 DEG C, extrusion speed 7-8 m/min; Air-cooled section bar surface temperature is to after 100-130 DEG C, putting into 1-5 DEG C of water-based hardening liquid and carry out quench treatment 6-7 minute;
(5) to aluminium alloy extrusions after alignment processes, being quenched by aluminium alloy extrusions, quenching temperature 400-500 DEG C, the type of cooling is chosen as high wind and coordinates water smoke quench cooled;
(6) within 8 hours, aluminium alloy extrusions being carried out ageing treatment after extruding terminates, aging temp is 165-185 DEG C, and soaking time is 6-8h;
(7) section bar after Wetted constructures being carried out sub-zero treatment, liquid nitrogen temperature is-125��-150 DEG C, and the time of sub-zero treatment is 2-5 hour, and the isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2��3min/mm2, the boiling water that the section bar that temperature gone back up to after sub-zero treatment room temperature puts into 100 DEG C heats 60-80 minute;
(8) temper: with heating rate, section bar shove charge is warming up to 380-400 DEG C with 20-30 DEG C per hour, is incubated 20-24 hour, then is down to 250-350 DEG C in stove with the speed of 20-30 DEG C per hour, cool to room temperature of then coming out of the stove;
(9), carburizing treatment, carburizing is by the section bar after bonderizing, is heated to 400��450 DEG C in the carburizing medium of gaseous state, hold-time 3-5h.
After testing, product chemical composition is: Si0.247%, Mg2.826%, Fe0.417%, Cu0.0614%, Mn0.0586%, Cr0.312%, Zn0.0856%, other elements add up to 0.121%, all the other be Al; Alloying constituent outside magnesium is brought into from raw material; Mechanical property is: tensile strength is 324MPa, and yield strength is 263MPa, and unit elongation is 16.5%; Surface property is: single-piece local thickness 24 ��m, sand trial wear factor 558g/ ��m, drop alkali test 136s.
Claims (3)
1. the smelting preparation method of an anti-impact pressure aluminium alloy extrusions, it is characterised in that, include following operation steps:
(1) aluminium alloy melt processed:
By following raw materials in part by weight: the discarded aluminum products of 55-65A356 aluminium ingot, 32-40,6-10 norbide, 5-10 nano ceramic powder carry out proportioning, above-mentioned raw materials is added smelting furnace, be warming up to furnace charge start softening under when collapsing, spreading last layer insulating covering agent to cover to molten liquid surface, described insulating covering agent is made up of following parts by weight of component: 10-20 part CaO, 10-25 part Al2O3, 35-45 part SiO2, 12-30 part charcoal, 12-23 part flyash; Add magnesium ingot again, fusing; Magnesium weight is the 1-5% of raw material aluminium weight;
(2) refining treatment:
Utilize refining agent that aluminium alloy melt is carried out refining treatment, when aluminium alloy melt is through refining treatment, and after clawing surface scum, melt can be infused into standing furnace, aluminium alloy melt is warming up to 600-650 DEG C and keeps 25-30min after entering standing furnace, then utilize argon gas to take the hydrogen in aluminium alloy melt and fine impurities to surface, thus reduce the hydrogen richness in aluminium liquid, 20-22Kg sodium removing agent is added again by every ton of aluminium alloy melt, described sodium removing agent is made up of following parts by weight of component: 50-60 Repone K, 30-40 active calcium carbonate powder, 2-10 chlordeneization two carbon, after standing furnace, casting obtains aluminum alloy round casting rod again, described refining agent obtains by following raw materials in part by weight: 7-9 Repone K, 4-6 plant ash, 3-4 diatomite, 2-3 quartz sand nanometer powder, 2-3 magnesium chloride, 4-6 Calcium Fluoride (Fluorspan), 3-5 SODIUMNITRATE, 5-8 Graphite Powder 99, 8-10 Sodium Silicofluoride, 3-5 sodium sulfate, 5-8 aluminum chloride, 3-5 salt of wormwood, 8-10 attapulgite, 5-8NaBF4, 3-5 sodium-chlor, 5-8 sodium carbonate, 8-10Na2TiF6, 5-8NaF; Join after the plant ash of above-mentioned weight part is mixed with diatomite in (0.8��1.2) g/L potassium permanganate solution and soak, remove impurity, then filtration washing is neutral, 400-450 DEG C of temperature lower calcination 1 hour, it is ground to powder again, finally adds quartz sand nanometer powder, magnesium chloride and mix in the lump and obtain modification plant ash;
Described refining agent preparation method is as follows:
A, the attapulgite 10-15% sulfuric acid of above-mentioned weight part is soaked 3-4 hour, deionized water wash, then soak 3-4 hour with 10-12% sodium hydroxide solution, then with deionized water wash to neutral, then at 500-530 DEG C, calcine 2-3 hour, pulverize into nanometer powder;
B, the Repone K by above-mentioned weight part, sodium-chlor, sodium sulfate, salt of wormwood, SODIUMNITRATE, attapulgite are added to the water, add the sodium laurylsulfate of attapulgite weight 2-3% again, the average of 1-2% adds, the tributyl citrate of 2-3%, 3-5% aluminum oxide, high speed 4800-5500 rev/min of stirring, obtaining dispersion liquid, dispersion liquid dewatered drying is pulverized;
C, will after other heating raw materials melting except modification plant ash particle, pulverize;
D, the material that step a, b, c obtain is added modification plant ash, binding agent mixing stir even after particulate mixtures;
(3) thermal treatment
Carrying out water atomization steam treatment after aluminum alloy round casting rod sawing, the treatment time is 4-5 hour, and temperature is 450-550 DEG C, and aluminum alloy round casting rod is sent in heat treatment furnace and is heated to 450-490 DEG C, and is incubated 2-3 hour; Then, with quenching oil cooling, the aluminum alloy round casting rod after quenching is sent in tempering stove and is heated to 300-400 DEG C, insulation 50-70min;
(4) forming process
Aluminum alloy round casting rod is heated to 450-500 DEG C, then utilizes round casting rod extrusion molding from mould that extrusion machine will heat, extrusion mould temperature 240-260 DEG C, extrusion speed 7-8 m/min; Air-cooled section bar surface temperature is to after 100-130 DEG C, putting into 1-5 DEG C of water-based hardening liquid and carry out quench treatment 6-7 minute;
(5) to aluminium alloy extrusions after alignment processes, being quenched by aluminium alloy extrusions, quenching temperature 400-500 DEG C, the type of cooling is chosen as high wind and coordinates water smoke quench cooled;
(6) within 8 hours, aluminium alloy extrusions being carried out ageing treatment after extruding terminates, aging temp is 165-185 DEG C, and soaking time is 6-8h;
(7) section bar after Wetted constructures being carried out sub-zero treatment, liquid nitrogen temperature is-125��-150 DEG C, and the time of sub-zero treatment is 2-5 hour, and the isothermal time in liquid nitrogen is: the cross-sectional area of section bar is multiplied by 2��3min/mm2, the boiling water that the section bar that temperature gone back up to after sub-zero treatment room temperature puts into 100 DEG C heats 60-80 minute;
(8) temper: with heating rate, section bar shove charge is warming up to 380-400 DEG C with 20-30 DEG C per hour, is incubated 20-24 hour, then is down to 250-350 DEG C in stove with the speed of 20-30 DEG C per hour, cool to room temperature of then coming out of the stove;
(9), carburizing treatment, carburizing is by the section bar after bonderizing, is heated to 400��450 DEG C in the carburizing medium of gaseous state, hold-time 3-5h.
2. the smelting preparation method of a kind of anti-impact according to claim 1 pressure aluminium alloy extrusions, it is characterised in that, the fineness of described norbide is 5-8 ��m.
3. the smelting preparation method of a kind of anti-impact according to claim 1 pressure aluminium alloy extrusions, it is characterized in that, described thermal treatment, water atomization steam treatment is carried out after aluminum alloy round casting rod sawing, treatment time is 4.5 hours, temperature is 500 DEG C, and aluminum alloy round casting rod is sent in heat treatment furnace and is heated to 480 DEG C, and is incubated 2.5 hours; Then, with quenching oil cooling, the aluminum alloy round casting rod after quenching is sent in tempering stove and is heated to 350 DEG C, insulation 60min.
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