CN103981411B - A kind of low temperature resistant aluminium alloy extrusions and preparation method thereof - Google Patents
A kind of low temperature resistant aluminium alloy extrusions and preparation method thereof Download PDFInfo
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- 238000001125 extrusion Methods 0.000 title claims abstract description 27
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims description 12
- 238000007670 refining Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 6
- 229960000892 attapulgite Drugs 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 6
- 229910052625 palygorskite Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 229910052882 wollastonite Inorganic materials 0.000 claims description 6
- 239000010456 wollastonite Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 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 3
- 238000003723 Smelting Methods 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 238000010009 beating Methods 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
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 229960001866 silicon dioxide Drugs 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229940001516 sodium nitrate Drugs 0.000 claims description 3
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of low temperature resistant aluminium alloy extrusions and preparation method thereof, does this alloy consist of by weight percentage: Si 0.3-0.5, Fe≤0.1, Cu 1.5-2.5, Mn 0.4-0.8, Mg 0.8-1.4, Cr 0.05-0.15, Zn 0.2-0.3, Ni 0.25-0.45, Mo 0.15-0.25, Li 0.3-0.6, Pd 0.1-0.2, Eu 0.05-0.1, Tb 0.04-0.06, surplus is Al.Aluminium alloy extrusions of the present invention has excellent resistance to low temperature, higher intensity, plasticity and toughness is still kept under 20K low temperature environment, not easily there is cold short low-temperature transformation, fatigue resistance is strong, durable in use, can be used for the structural support manufacturing space shuttle, the liquid hydrogen of rocket power plant, liquid oxygen storage tank and cryogenic magnet.
Description
Technical field
The present invention relates to a kind of low temperature resistant aluminium alloy extrusions and preparation method thereof, belong to aluminum alloy materials field.
Background technology
Aluminium alloy extrusions has that intensity is high, lightweight, stability is strong, good corrosion resistance, plasticity-are good, deflection is little, pollution-free, nontoxic, long service life, the features such as recyclability is good, be a most widely used class non-ferrous metal structured material in industry, widely apply in Aeronautics and Astronautics, automobile, machinofacture, boats and ships, building, finishing and chemical industry.Wherein the structural support of the liquid hydrogen (20K) of space shuttle, rocket power plant, liquid oxygen (90K) storage tank and cryogenic magnet requires very high to the resistance to low temperature of aluminium alloy extrusions, but easily there is brittle phenomenon under aluminium alloy extrusions low temperature on existing market, the mechanical properties such as its intensity, plasticity, toughness sharply reduce, and limit its use range.
Summary of the invention
The object of the present invention is to provide a kind of low temperature resistant aluminium alloy extrusions and preparation method thereof, the low temperature resistant temperature of this aluminium alloy extrusions can reach 20K.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of low temperature resistant aluminium alloy extrusions, this alloy consists of by weight percentage: Si0.3-0.5, Fe≤0.1, Cu1.5-2.5, Mn0.4-0.8, Mg0.8-1.4, Cr0.05-0.15, Zn0.2-0.3, Ni0.25-0.45, Mo0.15-0.25, Li0.3-0.6, Pd0.1-0.2, Eu0.05-0.1, Tb0.04-0.06, and surplus is Al.
The preparation method of the low temperature resistant aluminium alloy extrusions of the present invention, is characterized in that comprising the following steps:
(1) furnace charge is taken by formulation ratio calculating, get aluminium ingot and add heat fused in smelting furnace, when melt temperature reaches 715-735 DEG C, add Al-25wt%Cu master alloy successively, Al-10wt%Mg master alloy, Al-1wt%Cr master alloy, after its all fusing, temperature adjustment is to 730-750 DEG C, add Al-5wt%Mn master alloy, Al-3wt%Zn master alloy, Al-2wt%Mo master alloy, Al-5wt%Li master alloy, after stirring 10-15min, temperature adjustment is to 740-760 DEG C, add the refining agent of liquation weight 2-3%, skim after refining 15-20min, temperature adjustment is to 725-745 DEG C, add other surplus element alloying constituent, after stirring 15-20min, sampling analysis, it is qualified to be adjusted to, then be that 1.5-2.0L/min leads to 80%Ar+10%Cl with gas flow
2+ 10%SF
6refinery by de-gassing 15-20min, skims, and leaves standstill sampling after 10-15min and carries out both analysis, and analytical results meets the alloying constituent cast that requires to come out of the stove and can to come out of the stove cast, and teeming temperature is 695-715 DEG C,
(2) strand obtained is carried out Homogenization Treatments: be warming up to 160-220 DEG C with 80-120 DEG C/h, insulation 1-2h, 420-450 DEG C is warming up to again with 100-150 DEG C/h, insulation 5-10h, high wind is air-cooled to 150-180 DEG C, and insulation 1-2h, is then warming up to 505-525 DEG C with 150-200 DEG C/h, insulation 12-16h, air cooling is to room temperature;
(3) by the strand extrusion molding after homogenizing, extrusion temperature is 490-510 DEG C, extrusion ratio is 16-22:1, then the section bar extruded is carried out solution treatment: first at 440-480 DEG C, be incubated 1-2h, 0.5-1h is incubated again at 500-520 DEG C, then be placed in (20 ± 5) DEG C 10%NaCl salt solution quench section bar and be cooled to less than 50 DEG C, take out section bar and carry out ageing treatment: first at 150-200 DEG C, be incubated 8-12h, water-cooled is to room temperature, 15-20h is incubated again at 60-70 DEG C, air cooling is to room temperature, then at 100-120 DEG C, 10-15h is incubated, water-cooled is to room temperature, finally at 80-90 DEG C, be incubated 12-16h, air cooling is to room temperature.
The preparation method of described refining agent is as follows: a, get the raw material of following weight part: silicon-dioxide 30-40, sodium-chlor 15-25, sodium fluoroaluminate 10-15, Calcium Fluoride (Fluorspan) 5-10, sodium sulfate 12-18, SODIUMNITRATE 5-10, aluminium powder 8-14, rhombspar 20-30, wollastonite 10-15, attapulgite 10-15; B, rhombspar, wollastonite, attapulgite were pulverized 50-80 mesh sieve respectively, at 1160-1220 DEG C, 1-2h is calcined after mixing, shrend obtains broken particle, then the slurries that concentration is 40-50% are made in the making beating that adds water, then remaining raw material is added, 1000-1500rpm speed lapping 20-30min, then the slurries after grinding are carried out fluidized bed spray granulation, inlet temperature is 160-180 DEG C, fluidized-bed material layer temperature 94-98 DEG C, spray gun pressure 0.2-0.25MPa, obtains the refining agent that particle diameter is 1.5-3mm.
Beneficial effect of the present invention:
Aluminium alloy extrusions of the present invention has excellent resistance to low temperature, higher intensity, plasticity and toughness is still kept under 20K low temperature environment, not easily there is cold short low-temperature transformation, fatigue resistance is strong, durable in use, can be used for the structural support manufacturing space shuttle, the liquid hydrogen of rocket power plant, liquid oxygen storage tank and cryogenic magnet.
Embodiment
Embodiment
A kind of low temperature resistant aluminium alloy extrusions, this alloy consists of by weight percentage: Si0.3-0.5, Fe≤0.1, Cu1.5-2.5, Mn0.4-0.8, Mg0.8-1.4, Cr0.05-0.15, Zn0.2-0.3, Ni0.25-0.45, Mo0.15-0.25, Li0.3-0.6, Pd0.1-0.2, Eu0.05-0.1, Tb0.04-0.06, and surplus is Al.
The preparation method of low temperature resistant aluminium alloy extrusions, is characterized in that comprising the following steps:
(1) furnace charge is taken by formulation ratio calculating, get aluminium ingot and add heat fused in smelting furnace, when melt temperature reaches 725 DEG C, add Al-25wt%Cu master alloy successively, Al-10wt%Mg master alloy, Al-1wt%Cr master alloy, after its all fusing, temperature adjustment to 740 DEG C, add Al-5wt%Mn master alloy, Al-3wt%Zn master alloy, Al-2wt%Mo master alloy, Al-5wt%Li master alloy, temperature adjustment to 750 DEG C after stirring 15min, add the refining agent of liquation weight 2.5%, skim after refining 20min, temperature adjustment to 735 DEG C, add other surplus element alloying constituent, after stirring 15-20min, sampling analysis, it is qualified to be adjusted to, then be that 1.8L/min leads to 80%Ar+10%Cl with gas flow
2+ 10%SF
6refinery by de-gassing 20min, skims, and leaves standstill sampling after 15min and carries out both analysis, and analytical results meets the alloying constituent cast that requires to come out of the stove and can to come out of the stove cast, and teeming temperature is 705 DEG C,
(2) strand obtained is carried out Homogenization Treatments: be warming up to 180 DEG C with 100 DEG C/h, insulation 1h, then be warming up to 440 DEG C with 150 DEG C/h, insulation 8h, high wind is air-cooled to 150 DEG C, and insulation 1h, is then warming up to 515 DEG C with 200 DEG C/h, insulation 14h, and air cooling is to room temperature;
(3) by the strand extrusion molding after homogenizing, extrusion temperature is 500 DEG C, extrusion ratio is 18:1, then the section bar extruded is carried out solution treatment: first at 460 DEG C, be incubated 1h, 0.5h is incubated again at 520 DEG C, then be placed in 25 DEG C of 10%NaCl salt solution quench section bars and be cooled to less than 50 DEG C, take out section bar and carry out ageing treatment: first at 180 DEG C, be incubated 10h, water-cooled to room temperature, then is incubated 18h at 65 DEG C, and air cooling is to room temperature, then at 110 DEG C, 12h is incubated, water-cooled is to room temperature, and finally at 90 DEG C, be incubated 14h, air cooling is to room temperature.
The preparation method of described refining agent is as follows: a, get the raw material of following weight part: silicon-dioxide 36, sodium-chlor 18, sodium fluoroaluminate 15, Calcium Fluoride (Fluorspan) 7, sodium sulfate 14, SODIUMNITRATE 8, aluminium powder 12, rhombspar 22, wollastonite 15, attapulgite 10; B, rhombspar, wollastonite, attapulgite were pulverized 60 mesh sieves respectively, at 1180 DEG C, 2h is calcined after mixing, shrend obtains broken particle, and the slurries that concentration is 45% are made in the making beating that then adds water, and then add remaining raw material, 1500rpm speed lapping 20min, then the slurries after grinding are carried out fluidized bed spray granulation, inlet temperature is 170 DEG C, fluidized-bed material layer temperature 95 DEG C, spray gun pressure 0.2MPa, obtains the refining agent that particle diameter is 2mm.
Through inspection, the mechanical property of gained aluminium alloy extrusions at 20K temperature is: tensile strength 435MPa, yield strength 348Pa, elongation 12.9%.
Claims (2)
1. a low temperature resistant aluminium alloy extrusions, it is characterized in that, this alloy consists of by weight percentage: Si0.3-0.5, Fe≤0.1, Cu1.5-2.5, Mn0.4-0.8, Mg0.8-1.4, Cr0.05-0.15, Zn0.2-0.3, Ni0.25-0.45, Mo0.15-0.25, Li0.3-0.6, Pd0.1-0.2, Eu0.05-0.1, Tb0.04-0.06, and surplus is Al.
2. the preparation method of low temperature resistant aluminium alloy extrusions as claimed in claim 1, is characterized in that comprising the following steps:
(1) furnace charge is taken by formulation ratio calculating, get aluminium ingot and add heat fused in smelting furnace, when melt temperature reaches 715-735 DEG C, add Al-25wt%Cu master alloy successively, Al-10wt%Mg master alloy, Al-1wt%Cr master alloy, after its all fusing, temperature adjustment is to 730-750 DEG C, add Al-5wt%Mn master alloy, Al-3wt%Zn master alloy, Al-2wt%Mo master alloy, Al-5wt%Li master alloy, after stirring 10-15min, temperature adjustment is to 740-760 DEG C, add the refining agent of liquation weight 2-3%, skim after refining 15-20min, temperature adjustment is to 725-745 DEG C, add other surplus element alloying constituent, after stirring 15-20min, sampling analysis, it is qualified to be adjusted to, then be that 1.5-2.0L/min leads to 80%Ar+10%Cl2+10%SF6 refinery by de-gassing 15-20min with gas flow, skim, after leaving standstill 10-15min, both analysis is carried out in sampling, and analytical results meets alloying constituent and requires to come out of the stove cast, and teeming temperature is 695-715 DEG C,
(2) strand obtained is carried out Homogenization Treatments: be warming up to 160-220 DEG C with 80-120 DEG C/h, insulation 1-2h, 420-450 DEG C is warming up to again with 100-150 DEG C/h, insulation 5-10h, high wind is air-cooled to 150-180 DEG C, and insulation 1-2h, is then warming up to 505-525 DEG C with 150-200 DEG C/h, insulation 12-16h, air cooling is to room temperature;
(3) by the strand extrusion molding after homogenizing, extrusion temperature is 490-510 DEG C, extrusion ratio is 16-22:1, then the section bar extruded is carried out solution treatment: first at 440-480 DEG C, be incubated 1-2h, 0.5-1h is incubated again at 500-520 DEG C, then be placed in (20 ± 5) DEG C 10%NaCl salt solution quench section bar and be cooled to less than 50 DEG C, take out section bar and carry out ageing treatment: first at 150-200 DEG C, be incubated 8-12h, water-cooled is to room temperature, 15-20h is incubated again at 60-70 DEG C, air cooling is to room temperature, then at 100-120 DEG C, 10-15h is incubated, water-cooled is to room temperature, finally at 80-90 DEG C, be incubated 12-16h, air cooling is to room temperature,
The preparation method of described refining agent is as follows:
A, get the raw material of following weight part: silicon-dioxide 30-40, sodium-chlor 15-25, sodium fluoroaluminate 10-15, Calcium Fluoride (Fluorspan) 5-10, sodium sulfate 12-18, SODIUMNITRATE 5-10, aluminium powder 8-14, rhombspar 20-30, wollastonite 10-15, attapulgite 10-15;
B, rhombspar, wollastonite, attapulgite were pulverized 50-80 mesh sieve respectively, at 1160-1220 DEG C, 1-2h is calcined after mixing, shrend obtains broken particle, then the slurries that concentration is 40-50% are made in the making beating that adds water, then remaining raw material is added, 1000-1500rpm speed lapping 20-30min, then the slurries after grinding are carried out fluidized bed spray granulation, inlet temperature is 160-180 DEG C, fluidized-bed material layer temperature 94-98 DEG C, spray gun pressure 0.2-0.25MPa, obtains the refining agent that particle diameter is 1.5-3mm.
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| CN1878880A (en) * | 2003-10-03 | 2006-12-13 | 阿尔科公司 | Aluminum-copper-magnesium alloys having ancillary additions of lithium |
| CN102978453A (en) * | 2012-11-09 | 2013-03-20 | 安徽欣意电缆有限公司 | Al-Fe-In-RE aluminum alloy, and preparation method and power cable thereof |
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| CN1878880A (en) * | 2003-10-03 | 2006-12-13 | 阿尔科公司 | Aluminum-copper-magnesium alloys having ancillary additions of lithium |
| CN102978453A (en) * | 2012-11-09 | 2013-03-20 | 安徽欣意电缆有限公司 | Al-Fe-In-RE aluminum alloy, and preparation method and power cable thereof |
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Effective date of registration: 20191018 Address after: 233100, Chuzhou County, Anhui province Fengyang County Taiwan Industrial Park Patentee after: FENGYANG L-S LIGHT ALLOY NET FORMING CO., LTD. Address before: 221232 Heping Industrial Zone, Sha town, Xuzhou, Jiangsu, Suining Patentee before: JIANGSU HAIDEMAN NEW MATERIAL CO., LTD. |