CN103820686B - Electric conductivity is aldural line of 55%IACS and preparation method thereof - Google Patents
Electric conductivity is aldural line of 55%IACS and preparation method thereof Download PDFInfo
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- CN103820686B CN103820686B CN201410057973.9A CN201410057973A CN103820686B CN 103820686 B CN103820686 B CN 103820686B CN 201410057973 A CN201410057973 A CN 201410057973A CN 103820686 B CN103820686 B CN 103820686B
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- 238000002360 preparation method Methods 0.000 title claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 263
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 250
- 239000004411 aluminium Substances 0.000 claims abstract description 222
- 239000007788 liquid Substances 0.000 claims abstract description 132
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 68
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 66
- 239000000956 alloy Substances 0.000 claims abstract description 66
- 239000011777 magnesium Substances 0.000 claims abstract description 62
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 61
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000005266 casting Methods 0.000 claims abstract description 38
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 238000007872 degassing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 16
- 230000008018 melting Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 229910052769 Ytterbium Inorganic materials 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052796 boron Inorganic materials 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000002425 crystallisation Methods 0.000 claims abstract description 6
- 230000008025 crystallization Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 84
- 229910052757 nitrogen Inorganic materials 0.000 claims description 42
- 230000032683 aging Effects 0.000 claims description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
- 239000002893 slag Substances 0.000 claims description 20
- FGUJWQZQKHUJMW-UHFFFAOYSA-N [AlH3].[B] Chemical compound [AlH3].[B] FGUJWQZQKHUJMW-UHFFFAOYSA-N 0.000 claims description 18
- -1 aluminium ytterbium rare earth Chemical class 0.000 claims description 18
- 238000007670 refining Methods 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 15
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000005728 strengthening Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 5
- XCJXQCUJXDUNDN-UHFFFAOYSA-N chlordene Chemical compound C12C=CCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl XCJXQCUJXDUNDN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 5
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 5
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 235000009566 rice Nutrition 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 5
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005275 alloying Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 8
- 241000209094 Oryza Species 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 241001474033 Acar Species 0.000 description 1
- 101100244352 Solanum lycopersicum LHA1 gene Proteins 0.000 description 1
- 101100244357 Solanum lycopersicum LHA2 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The present invention relates to a kind of electric conductivity 55%IACS aldural line and manufacture method thereof, belong to alloy manufacturing technology field.Alloying element weight percent meter formula rate: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, all the other are aluminium.Its through Material selec-tion, the melting of aluminium liquid, aluminium liquid composition adjustment, purifying treatment, skim, be incubated standing, degassing processing, the art breading such as insulation is filtered, casting crystallization, the rolling of aluminium bar, drawing, timeliness obtains product electric conductivity >=55%IACS, the aldural line of tensile strength >=315MPa.Utilize the electric wire that this aluminium alloy is produced, can continue to use traditional construction technology erection; In circuit operational process, reduce line losses, save executive cost, bring huge economic benefit and social benefit to power transmission and transformation industry.
Description
Technical field
The present invention relates to a kind of electric conductivity 55%IACS aldural line and manufacture method thereof, specifically one relates to high-strength high-conductivity aluminium alloy electric conductor and manufacturing technology thereof, belongs to alloy manufacturing technology field.
Background technology
The exploitation of wire, the application history of existing more than 100 year, the exploitation of aluminium alloy conductor, the application history of existing more than 80 year.
Since United States Non-Provisional in 1898 has used pure aluminium vire to do since Aldrey aluminium alloy appears in overhead stranded conductor and nineteen twenty-one, aluminium is widely applied in electrical industry as conductor.The shortcomings such as aluminium alloy overcomes at the bottom of the intensity of fine aluminium twisted wire, creep properties, resistance toheat difference, make conduction aluminium alloy develop more rapid.The states such as aluminum stranded wire of aluminum alloy core (ACAR) U.S. in North America, Canada are widely applied.
China implements employing " amphitypy three is new " product and technology in power construction in recent years, and the alloy products such as all aluminium alloy twisted wire, aluminum stranded wire of aluminum alloy core are able to a large amount of application.But aldural line kind LHA1, LHA2 that current China uses in a large number, aluminium alloy electric conductivity is respectively 52.5%IACS and 53%IACS, has certain room for promotion with common hard-drawn aluminium wire electric conductivity 61%IACS.Therefore, under the prerequisite ensureing Al-alloy mechanical properties, improving electric conductivity further, is the direction that various countries investigator makes great efforts.
Summary of the invention
The object of the invention is to develop a kind of energy more than electric conductivity 55%IACS, the better aldural line of technique tolerance; Another object of the present invention is to provide the preparation method of this aluminum alloy line.
According to technical scheme provided by the invention, a kind of electric conductivity is the aldural line of 55%IACS, and formula rate is as follows by weight percentage: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, all the other are aluminium.
Described aluminum alloy line diameter >=3.5mm, tensile strength >=315MPa, line diameter < 3.5mm, tensile strength >=325MPa, electric conductivity >=55%IACS, more than unit elongation >=3%.
Described electric conductivity is that the preparation method of the aldural line of 55%IACS is as follows:
(1) Material selec-tion: by weight percentage:
The selection of a, aluminium ingot: by Si≤0.16% in the aluminium liquid of aluminium ingot melting; Fe≤0.20%; Cu≤0.01%; Ti+Mn+Cr+V≤0.02%; Other foreign matter content≤0.03%; All the other are aluminium;
B, ferro-aluminum master alloy: Fe 5%; Si≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
C, aluminium silicon master alloy: Si 10%; Fe≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
D, aluminium boron master alloy: B 3%; Si≤0.2%; Fe≤0.4%; Cu≤0.01%; All the other foreign matter content≤0.03%; All the other are aluminium;
E, aluminium ytterbium rare earth intermediate alloy: Yb 5%; Si≤0.2%; Fe≤0.2%; Cu≤0.1%; All the other foreign matter content≤0.03%; All the other are aluminium;
F, magnesium ingot: Si≤0.005% in selected pure magnesium ingot; Fe≤0.004%; Cu≤0.003%; Ti+Mn+Cr+V≤0.02%; All the other foreign matter content≤0.03%; All the other are magnesium;
(2) aluminium liquid melting: by weight: get aluminium ingot 93.55-95.25 part that step (1) selects, ferro-aluminum master alloy 0.1-0.8 part, aluminium silicon master alloy 3.25-4.75 part adds in molten aluminium stove and melt; Temperature of fusion is 690-730 DEG C, and smelting time is 1-3h; Get aluminium boron master alloy 0.42-0.65 part and aluminium ytterbium rare earth intermediate alloy 0.68-0.98 part, drop down continuous uniform in groove from molten aluminium stove to holding furnace and add;
After the fusing of aluminium liquid terminates completely, the temperature of aluminum liquid in holding furnace is controlled at 730-750 DEG C, starts when temperature of aluminum liquid stablizes 730-750 DEG C to add magnesium ingot 0.62-0.69 part;
(3) aluminium liquid composition adjustment: by weight percentage: quick on-the-spot sample analysis is carried out to aluminium liquid with direct-reading spectrometer, monitored and adjusted each constituent content, guarantee whole stove aluminium liquid uniform composition, the content of each element is controlled: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, all the other are aluminium;
(4) purifying treatment: step (3) gained temperature of aluminum liquid is warming up to 730-750 DEG C, refining treatment is carried out to aluminium liquid; Be carrier stainless steel tube with high pure nitrogen is blown into the refining agent that consumption is furnace charge total mass 0.1%-0.5% in aluminium liquid bottom holding furnace; Control nitrogen flow, the degree of being with gentle boil; Described nitrogen flow rate is 0.7-1m
3/ h, the inflated with nitrogen time is 5-10min;
(5) skim: step (4) is carried out after purifying treatment terminates to aluminium liquid, temperature is made to control at 720-750 DEG C, leave standstill 5-10min, allow aluminium slag floating cause aluminium liquid surface, open door of skimming, take off with the scum silica frost of slag-off machine by liquid level surface, when skimming from inside to outside, slightly stop when taking off slope in stove gate, allow the aluminium liquid taken out of pass back in stove, then slag is taken off outside coming out of the stove;
(6) insulation leaves standstill: after above-mentioned each operation completes, and is incubated to leave standstill to process aluminum solutions, and the temperature leaving standstill insulation is 730-750 DEG C, and the time is not less than 20min, must not stir aluminium alloy solution when leaving standstill insulation; Control holding furnace pitch velocity, make to match with casting rate, avoid neglecting soon, neglect slowly;
(7) degassing processing: aluminium liquid enters degasification tank from holding furnace through dropping down groove, degasification tank transmission system drives graphite rotator to rotate, and uses nitrogen/argon gas to be blown into aluminium liquid via rotor shaft, shower nozzle; The graphite rotator of high speed rotating is broken up the nitrogen/argon gas entering aluminium liquid and is formed a lot of small bubbles, it is made to be dispersed in molten metal, simultaneously rotating rotor also impels hydrogen in molten aluminium, non-metallic inclusion diffusion, make it and bubble contact, bubble by partial pressure difference and surface adsorption principle, absorbs the hydrogen in melt, adsorption and oxidation slag inclusion in the melt, and rise with bubble and taken out of bath surface, aluminium liquid is purified;
(8) insulation filter: step (7) gained aluminium liquid flows out from degasification tank, enters insulation filtration unit through dropping down groove, aluminium liquid through ceramic fiber filter plate, filtering more than 30 μm slag cores;
(9) casting crystallization: aluminium liquid flows into crystallizing wheel startup continuous mill and carries out level casting, pouring temperature is 690-710 DEG C, fort and horizontal pouring mouth are watered in the combination of horizontal casting machine configuration level, and avoid eddy current to improve casting idioplasm amount, aluminium liquid is cooled to aluminum alloy ingot again through crystallizing wheel casting;
(10) aluminium bar rolling: the temperature of entering to roll of aluminum alloy ingot, by intermediate frequency heater, controls in the scope of 490-520 DEG C by the shaping aluminum alloy ingot of step (9) ingot casting, aluminium alloy rod go out to roll temperature more than 350 DEG C, carry out quench treatment immediately after going out to roll;
(11) aluminium bar process:
A, around bar take-up: to the aluminium bar after rolling by around lever apparatus around bar;
B, intensive treatment: carry out the hot intensive treatment of timeliness to receiving the aluminium alloy rod sequenced, temperature controls at 145-160 DEG C, takes out after enhanced time 3-5h;
C, aluminum steel draw to be dialled: the aluminium alloy rod intensity through intensive treatment joined in mould to draw in drawing passage and dial, elongation control, between 1.2-1.3, carries out Reasonable mould according to different wire diameters;
D, ageing treatment: the aluminum alloy line of drawing carries out ageing strengthening, aging temp 145-160 DEG C, aging time 3-5 hour, obtain the aldural line that product electric conductivity is 55%IACS.
The Nitrogen content of described high pure nitrogen be 99.99% and more than.
Step (4) described refining agent formula is as follows by weight percentage: the chlordene methane of the Calcium Fluoride (Fluorspan) of 18%-22%, the Repone K of 32%-36%, 8%-12%, the potassium fluoborate of 5%-6%, the magnesium fluoride of 12%-16%, the wood charcoal powder of 10%-15% mix.
The described ceramic fiber screen plate of step (8) is 40pp ceramic filter plate.
In step (2), at the end of the melting of aluminium ingot, before adding magnesium ingot, if in holding furnace after aluminium liquefaction completely, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy add not yet, then remaining center and the corner of dropping into aluminium liquid with peel uniformly, rear uniform stirring to be melted.
In step (2), when adding magnesium ingot, magnesium ingot is cut into fritter, then divide 4-8 to criticize to put into bell jar; And rapidly bell jar is pressed in aluminium liquid after preheating a little in stove, then do " rice " font all around and move, until magnesium ingot fritter melts completely.To notice when adding magnesium ingot that in holding furnace, each position adds the even of magnesium amount in batches, be also noted that simultaneously bell jar not in tow furnace bottom move, will move at slightly blast furnace bottom aluminium liquid place, in case drag bad furnace bottom, more can not move in case magnesium ingot scaling loss on the top of aluminium liquid.
All the other impurity described in the application refer to inevitable impurity in aluminium ingot, ferro-aluminum master alloy, aluminium silicon master alloy, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy and magnesium ingot.
Aluminum alloy line of the present invention with the addition of rare earth ytterbium element, wire intensity can be improved, simultaneously, the amplitude that electric conductivity declines reduces, and can obtain diameter >=3.5mm, tensile strength >=315MPa, line diameter < 3.5mm, tensile strength >=325MPa, electric conductivity >=55%IACS, the aldural line of unit elongation >=3%.
Aluminum substrate should adopt the aluminium ingot of trade mark AL99.60 or more the trade mark to carry out melting; Magnesium ingot selects the above pure magnesium ingot of trade mark Mg99.95.
To notice when adding magnesium that in holding furnace, each position adds the even of magnesium amount in batches, be also noted that simultaneously bell jar not in tow furnace bottom move, will move at slightly blast furnace bottom aluminium liquid place, in case drag bad furnace bottom, more can not move in case magnesium ingot scaling loss on the top of aluminium liquid.
Control nitrogen flow, do not allow aluminium liquid seethe fierce especially, flow control is degree of being with gentle boil.The nitrogen flow time can be a little longer, is conducive to the aluminium liquid degasification of holding furnace.
The shaping aluminum alloy ingot of ingot casting is by intermediate frequency heater, and control in the scope of 490-520 DEG C by the temperature of entering to roll of aluminum alloy ingot, that guarantees each alloying element has higher solubleness in aluminium.
The aluminium alloy rod of roll forming will carry out quench treatment immediately, improves the solid solubility of each element in aluminium.
Beneficial effect of the present invention: compared with prior art, its advantage is the method with heavy rare earth element ytterbium (Yb) microalloying in the present invention, one, can promote the precipitation of the solid solution elements such as Mg, Fe, Si in aluminium alloy to improve the conductivity of aluminium alloy; Two, second-phase nodularization can be promoted, reduce aluminium alloy strengthening phase to the impact of conductivity; The microhardness of aluminum alloy line three, can be improved, improve the intensity of aluminum alloy line; Four, more easily promote Mg in low temperature ageing process
5si
6the precipitation of alloy strengthening phase.Heavy rare earths ytterbium (Yb) element be added in ensure strengthening effect prerequisite under, reduce the impact of alloying element on aluminium electric conductivity.Meanwhile, strictly control Mg, Fe, Si content and ratio thereof, and through boronation, refining, the art breading such as timeliness, can obtain electric conductivity >=55%IACS, tensile strength >=315MPa, the aldural line of unit elongation >=3%.Utilize the electric wire that this aluminium alloy is produced, can continue to use traditional construction technology erection; In circuit operational process, reduce line losses, save executive cost, bring huge economic benefit and social benefit to power transmission and transformation industry.
Accompanying drawing explanation
Fig. 1 is production technological process of the present invention.
Fig. 2 present device figure.
1, groove is dropped down; 2, holding furnace; 3, molten aluminium stove; 4, degasification tank; 5, thermal-insulation filter box; 6, crystallizing wheel; 7, intermediate frequency heater; 8, milling train; 9, around lever apparatus.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1
Electric conductivity is an aldural line of 55%IACS, and formula rate is as follows by weight percentage: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, and all the other are aluminium.
Described electric conductivity is the preparation method of the aldural line of 55%IACS, and step is as follows:
(1) Material selec-tion: by weight percentage:
The selection of a, aluminium ingot: the aluminium ingot selecting 8 tons of trade mark Al99.70, Si 0.08%; Fe 0.15%; Cu 0.002%; Ti+Mn+Cr+V 0.015%; Other foreign matter content≤0.03%; All the other are aluminium;
B, ferro-aluminum master alloy: ferro-aluminum master alloy 52kg, Fe 5%; Si 0.16%; Cu 0.008%; Ti+Mn+Cr+V≤0.03%; Other foreign matter content≤0.03%; All the other are aluminium;
C, aluminium silicon master alloy: aluminium silicon master alloy 335kg, Si 10%; Fe 0.18%; Cu 0.004%; Ti+Mn+Cr+V≤0.052%; Other foreign matter content≤0.03%; All the other are aluminium;
D, aluminium boron master alloy: aluminium boron master alloy 40kg, B 2.89%; Si 0.16%; Fe 0.24%; Cu 0.01%; Often kind of foreign matter content≤0.03% more than other; All the other are aluminium;
E, aluminium ytterbium rare earth intermediate alloy: aluminium ytterbium rare earth intermediate alloy 60kg, Yb 5%; Si 0.12%; Fe 0.15%; Cu 0.045%; Other foreign matter content≤0.03%; All the other are aluminium;
F, magnesium ingot: trade mark Mg99.95 magnesium ingot 55kg, Si 0.0007% in selected pure magnesium ingot; Fe 0.0015%; Cu 0.002%; Ti+Mn+Cr+V 0.0001%; Other foreign matter content≤0.03%; All the other are magnesium;
(2) aluminium liquid melting: get aluminium ingot that step (1) selects, ferro-aluminum master alloy, aluminium silicon master alloy add in molten aluminium stove and melt; Temperature of fusion is 730 DEG C, and smelting time is 1h; Get aluminium boron master alloy and aluminium ytterbium rare earth intermediate alloy, groove (1) the interior continuous uniform that drops down from molten aluminium stove (3) to holding furnace (2) adds;
At the end of the melting of aluminium ingot, if in holding furnace (2) after aluminium liquefaction completely, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy add not yet, then remaining center and the corner of dropping into aluminium liquid with peel uniformly, rear uniform stirring to be melted;
After the fusing of aluminium liquid terminates completely, the temperature of aluminum liquid in holding furnace (2) is controlled at 745 DEG C, starts when temperature of aluminum liquid stablizes 745 DEG C to add magnesium ingot 55kg; Divided by magnesium ingot 7 batches to put into bell jar, magnesium ingot cuts into fritter; Rapidly bell jar is pressed in aluminium liquid after preheating a little in stove, then does " rice " font all around and move, until magnesium ingot fritter melts completely;
(3) aluminium liquid composition adjustment: by weight percentage: carry out quick on-the-spot sample analysis to aluminium liquid with direct-reading spectrometer, is monitored and is adjusted each constituent content, and guarantee whole stove aluminium liquid uniform composition, the content of each element is controlled; Fe 0.182%, Si 0.513%, Mg 0.625%, B 0.014%, Yb 0.035%, Ti+Mn+Cr+V 0.021%, other foreign matter content≤0.03%, all the other are aluminium.Meet electric conductivity 55%IACS aldural line component requirements.
(4) purifying treatment: step (3) gained temperature of aluminum liquid is warming up to 740 DEG C, refining treatment is carried out to aluminium liquid; Be that the stainless steel tube of carrier diameter 18mm is blown into the refining agent that consumption is furnace charge total mass 14kg in the aluminium liquid of holding furnace (2) bottom with high pure nitrogen; Control nitrogen flow, the degree of being with gentle boil; Described nitrogen flow rate is 1m
3/ h, the inflated with nitrogen time is 5min;
(5) skim: step (4) is carried out after purifying treatment terminates to aluminium liquid, temperature is made to control at 745 DEG C, leave standstill 8min, allow aluminium slag floating cause aluminium liquid surface, open door of skimming, take off with the scum silica frost of slag-off machine by liquid level surface, when skimming from inside to outside, slightly stop when taking off slope in stove gate, allow the aluminium liquid taken out of pass back in stove, then slag is taken off outside coming out of the stove;
(6) insulation leaves standstill: after above-mentioned each operation completes, and is incubated to leave standstill to process aluminum solutions, and the temperature leaving standstill insulation is 745 DEG C, and the time is not less than 20min, must not stir aluminium alloy solution when leaving standstill insulation; Control holding furnace pitch velocity, make to match with casting rate, avoid neglecting soon, neglect slowly;
(7) degassing processing: aluminium liquid enters degasification tank (4) from holding furnace (2) through dropping down groove, degasification tank (4) transmission system drives graphite rotator to rotate, and uses nitrogen/argon gas to be blown into aluminium liquid via rotor shaft, shower nozzle; The graphite rotator of high speed rotating is broken up the nitrogen/argon gas entering aluminium liquid and is formed a lot of small bubbles, it is made to be dispersed in molten metal, simultaneously rotating rotor also impels hydrogen in molten aluminium, non-metallic inclusion diffusion, make it and bubble contact, bubble by partial pressure difference and surface adsorption principle, absorbs the hydrogen in melt, adsorption and oxidation slag inclusion in the melt, and rise with bubble and taken out of bath surface, aluminium liquid is purified;
(8) insulation filter: step (7) gained aluminium liquid flows out from degasification tank (4), enters thermal-insulation filter box (5) through dropping down groove, aluminium liquid through ceramic fiber filter plate, filtering more than 30 μm slag cores;
(9) casting crystallization: aluminium liquid flows into crystallizing wheel (6) startup milling train (8) and carries out level casting, pouring temperature is 700 DEG C, fort and horizontal pouring mouth are watered in the combination of horizontal casting machine configuration level, and avoid eddy current to improve casting idioplasm amount, aluminium liquid is cooled to aluminum alloy ingot again through crystallizing wheel (6) casting;
(10) aluminium bar rolling: the temperature of entering to roll of aluminum alloy ingot, by intermediate frequency heater (7), controls at 500 DEG C by the shaping aluminum alloy ingot of step (9) ingot casting, aluminium alloy rod go out to roll temperature at 380 DEG C, carry out quench treatment immediately after going out to roll;
(11) aluminium bar process:
A, around bar take-up: to the aluminium bar after rolling by around lever apparatus (9) around bar;
B, intensive treatment: carry out the hot intensive treatment of timeliness to receiving the aluminium alloy rod sequenced, temperature controls, at 155 DEG C, to take out after enhanced time 3h; Aluminium bar intensity reaches 220MPa, and electric conductivity is 54.5%IACS.
C, aluminum steel draw to be dialled: the aluminium alloy rod intensity through intensive treatment joined in mould to draw in drawing passage and dial, drawing wire machine will play into the aluminium alloy single line that diameter is 3.22mm and 4.53mm, and drawing joins the elongation control of mould between 1.2-1.3.
D, ageing treatment: the aluminum alloy line of drawing carries out ageing strengthening, aging temp 150 DEG C, aging time 4.5 hours, obtains the aldural line that product electric conductivity is 55%IACS.
Aluminum alloy line performance after testing: diameter 3.22mm single line: single line intensity 330 ~ 345MPa, electric conductivity 55.8-56.6%, elongation 5-7%; Diameter 4.53mm single line: single line intensity 320 ~ 336MPa, electric conductivity 56.1-56.8%, elongation 5-7%.
The Nitrogen content of described high pure nitrogen be 99.99% and more than.
Step (4) described refining agent formula meter is as follows: the Calcium Fluoride (Fluorspan) of 18 parts, the Repone K of 32 parts, the chlordene methane of 8 parts, the potassium fluoborate of 5 parts, the magnesium fluoride of 12 parts, the wood charcoal powder of 10 parts mix.
The described ceramic fiber screen plate of step (8) is 40pp ceramic filter plate.
Embodiment 2
Electric conductivity is an aldural line of 55%IACS, and formula rate is as follows by weight percentage: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, and all the other are aluminium.
Described electric conductivity is the preparation method of the aldural line of 55%IACS, and step is as follows:
(1) Material selec-tion: by weight percentage:
The selection of a, aluminium ingot: the aluminium ingot selecting 7.5 tons of trade mark Al99.60, ensures in the aluminium liquid by aluminium ingot melting: Si 0.12%; Fe 0.19%; Cu 0.009%; Ti+Mn+Cr+V 0.02%; Other foreign matter content≤0.03%; All the other are aluminium;
B, ferro-aluminum master alloy: ferro-aluminum master alloy 10kg, Fe 5%; Si 0.18%; Cu 0.008%; Ti+Mn+Cr+V≤0.03%; Other foreign matter content≤0.03%; All the other are aluminium;
C, aluminium silicon master alloy: aluminium silicon master alloy 305kg, Si 10%; Fe 0.18%; Cu 0.004%; Ti+Mn+Cr+V≤0.052%; Other foreign matter content≤0.03%; All the other are aluminium;
D, aluminium boron master alloy: aluminium boron master alloy 50kg, B 3%; Si 0.08%; Fe 0.15%; Cu 0.045%; Often kind of foreign matter content≤0.03% more than other; All the other are aluminium;
E, aluminium ytterbium rare earth intermediate alloy: aluminium ytterbium rare earth intermediate alloy 72 kg, Yb 5%; Si≤0.2%; Fe≤0.2%; Cu≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
F, magnesium ingot: trade mark Mg99.95 magnesium ingot 52kg, Si 0.0007% in selected pure magnesium ingot; Fe 0.0015%; Cu 0.002%; Ti+Mn+Cr+V 0.0001%; Other foreign matter content≤0.03%; All the other are magnesium;
(2) aluminium liquid melting: get aluminium ingot that step (1) selects, ferro-aluminum master alloy, aluminium silicon master alloy add in molten aluminium stove (3) and melt; Temperature of fusion is 730 DEG C, and smelting time is 1h; Get aluminium boron master alloy and aluminium ytterbium rare earth intermediate alloy, groove (1) the interior continuous uniform that drops down from molten aluminium stove (3) to holding furnace (2) adds;
At the end of the melting of aluminium ingot, if in holding furnace (2) after aluminium liquefaction completely, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy add not yet, then remaining center and the corner of dropping into aluminium liquid with peel uniformly, rear uniform stirring to be melted;
After the fusing of aluminium liquid terminates completely, the temperature of aluminum liquid in holding furnace (2) is controlled at 740 DEG C, starts when temperature of aluminum liquid stablizes 740 DEG C to add magnesium ingot 52kg; Divided by magnesium ingot 4 batches to put into bell jar, magnesium ingot cuts into fritter; Rapidly bell jar is pressed in aluminium liquid after preheating a little in stove, then does " rice " font all around and move, until magnesium ingot fritter melts completely;
(3) aluminium liquid composition adjustment: by weight percentage: carry out quick on-the-spot sample analysis to aluminium liquid with direct-reading spectrometer, is monitored and is adjusted each constituent content, and guarantee whole stove aluminium liquid uniform composition, the content of each element is controlled; Fe 0.193%, Si 0.535%, Mg 0.652%, B 0.018%, Yb 0.047%, Ti+Mn+Cr+V 0.021%, other foreign matter content≤0.03%, all the other are aluminium.
(4) purifying treatment: step (3) gained temperature of aluminum liquid is warming up to 740 DEG C, refining treatment is carried out to aluminium liquid; Be that the stainless steel tube of carrier diameter 18mm is blown into the refining agent that consumption is furnace charge total mass 14kg in the aluminium liquid of holding furnace (2) bottom with high pure nitrogen; Control nitrogen flow, the degree of being with gentle boil; Described nitrogen flow rate is 0.9m
3/ h, the inflated with nitrogen time is 7min;
(5) skim: step (4) is carried out after purifying treatment terminates to aluminium liquid, temperature is made to control at 720-750 DEG C, leave standstill 5-10min, allow aluminium slag floating cause aluminium liquid surface, open door of skimming, take off with the scum silica frost of slag-off machine by liquid level surface, when skimming from inside to outside, slightly stop when taking off slope in stove gate, allow the aluminium liquid taken out of pass back in stove, then slag is taken off outside coming out of the stove;
(6) insulation leaves standstill: after above-mentioned each operation completes, and is incubated to leave standstill to process aluminum solutions, and the temperature leaving standstill insulation is 745 DEG C, and the time is not less than 20min, must not stir aluminium alloy solution when leaving standstill insulation; Control holding furnace (2) pitch velocity, make to match with casting rate, avoid neglecting soon, neglect slowly;
(7) degassing processing: aluminium liquid enters degasification tank (4) from holding furnace (2) through dropping down groove, degasification tank (4) transmission system drives graphite rotator to rotate, and uses nitrogen/argon gas to be blown into aluminium liquid via rotor shaft, shower nozzle; The graphite rotator of high speed rotating is broken up the nitrogen/argon gas entering aluminium liquid and is formed a lot of small bubbles, it is made to be dispersed in molten metal, simultaneously rotating rotor also impels hydrogen in molten aluminium, non-metallic inclusion diffusion, make it and bubble contact, bubble by partial pressure difference and surface adsorption principle, absorbs the hydrogen in melt, adsorption and oxidation slag inclusion in the melt, and rise with bubble and taken out of bath surface, aluminium liquid is purified;
(8) insulation filter: step (7) gained aluminium liquid flows out from degasification tank (4), enters thermal-insulation filter box (5) through dropping down groove, aluminium liquid through ceramic fiber filter plate, filtering more than 30 μm slag cores;
(9) casting crystallization: aluminium liquid flows into crystallizing wheel (6) startup milling train (8) and carries out level casting, pouring temperature is 710 DEG C, fort and horizontal pouring mouth are watered in the combination of horizontal casting machine configuration level, and avoid eddy current to improve casting idioplasm amount, aluminium liquid is cooled to aluminum alloy ingot again through crystallizing wheel (6) casting;
(10) aluminium bar rolling: the temperature of entering to roll of aluminum alloy ingot, by intermediate frequency heater (7), controls in the scope of 510 DEG C by the shaping aluminum alloy ingot of step (9) ingot casting, aluminium alloy rod go out to roll temperature more than 360 DEG C, carry out quench treatment immediately after going out to roll;
(11) aluminium bar process:
A, around bar take-up: to the aluminium bar after rolling by around lever apparatus (9) around bar;
B, intensive treatment: carry out the hot intensive treatment of timeliness to receiving the aluminium alloy rod sequenced, temperature controls, at 150 DEG C, to take out after enhanced time 4h; Aluminium bar intensity reaches 225MPa, and electric conductivity is 54.3%IACS.
C, aluminum steel draw to be dialled: the aluminium alloy rod intensity through intensive treatment joined in mould to draw in drawing passage and dial, drawing wire machine will play into the aluminium alloy single line that diameter is 3.22mm and 4.53mm, and drawing joins the elongation control of mould between 1.2-1.3.
D, ageing treatment: the aluminum alloy line of drawing carries out ageing strengthening, aging temp 145 DEG C, aging time 5 hours, obtains the aldural line that product electric conductivity is 55%IACS.
Aluminum alloy line performance after testing: diameter 3.22mm single line: single line intensity 328 ~ 346MPa, electric conductivity 55.4-56.5%, elongation 5-7.2%; Diameter 4.53mm single line: single line intensity 322 ~ 340MPa, electric conductivity 55.7-56.9%, elongation 6-8%.
The Nitrogen content of described high pure nitrogen be 99.99% and more than.
Step (4) described refining agent formula is as follows: the Calcium Fluoride (Fluorspan) of 22 parts, the Repone K of 36 parts, the chlordene methane of 12 parts, the potassium fluoborate of 6 parts, the magnesium fluoride of 16 parts, the wood charcoal powder of 15 parts mix.
The described ceramic fiber screen plate of step (8) is 40pp ceramic filter plate.
Embodiment 3
Electric conductivity is an aldural line of 55%IACS, and formula rate is as follows by weight percentage: iron 0.2%, silicon 0.51%, magnesium 0.66%, boron 0.015%, ytterbium 0.04%, and all the other are aluminium.
Described electric conductivity is the preparation method of the aldural line of 55%IACS, and step is as follows:
(1) Material selec-tion: by weight percentage:
The selection of a, aluminium ingot: ensure Si≤0.16% in the aluminium liquid by aluminium ingot melting; Fe≤0.20%; Cu≤0.01%; Ti+Mn+Cr+V≤0.02%; Other foreign matter content≤0.03%; All the other are aluminium;
B, ferro-aluminum master alloy: Fe 5%; Si≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
C, aluminium silicon master alloy: Si 10%; Fe≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
D, aluminium boron master alloy: B 3%; Si≤0.2%; Fe≤0.4%; Cu≤0.01%; Often kind of foreign matter content≤0.03% more than other; All the other are aluminium;
E, aluminium ytterbium rare earth intermediate alloy: Yb 5%; Si≤0.2%; Fe≤0.2%; Cu≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
F, magnesium ingot: Si≤0.005% in selected pure magnesium ingot; Fe≤0.004%; Cu≤0.003%; Ti+Mn+Cr+V≤0.02%; Other foreign matter content≤0.03%; All the other are magnesium;
(2) aluminium liquid melting: by weight: get aluminium ingot 94.85 parts that step (1) selects, ferro-aluminum master alloy 0.4 part, aluminium silicon master alloy 4.35 parts add in molten aluminium stove and melt; Temperature of fusion is 710 DEG C, and smelting time is 2h; Get aluminium boron master alloy 0.55 part and aluminium ytterbium rare earth intermediate alloy 0.8 part, groove (1) the interior continuous uniform that drops down from molten aluminium stove (3) to holding furnace (2) adds;
At the end of the melting of aluminium ingot, if in holding furnace (2) after aluminium liquefaction completely, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy add not yet, then remaining center and the corner of dropping into aluminium liquid with peel uniformly, rear uniform stirring to be melted;
After the fusing of aluminium liquid terminates completely, the temperature of aluminum liquid in holding furnace (2) is controlled at 730 DEG C, starts when temperature of aluminum liquid stablizes 730 DEG C to add magnesium ingot 0.65 part; Divided by magnesium ingot 8 batches to put into bell jar, magnesium ingot cuts into fritter; Rapidly bell jar is pressed in aluminium liquid after preheating a little in stove, then does " rice " font all around and move, until magnesium ingot fritter melts completely;
(3) aluminium liquid composition adjustment: by weight percentage: quick on-the-spot sample analysis is carried out to aluminium liquid with direct-reading spectrometer, monitored and adjusted each constituent content, guarantee whole stove aluminium liquid uniform composition, the content of each element is controlled: iron 0.21%, silicon 0.53%, magnesium 0.65%, boron 0.015%, ytterbium 0.04%, all the other are aluminium;
(4) purifying treatment: step (3) gained temperature of aluminum liquid is warming up to 740 DEG C, refining treatment is carried out to aluminium liquid; Be carrier stainless steel tube with high pure nitrogen is blown into the refining agent that consumption is furnace charge total mass 0.45% in the aluminium liquid of holding furnace (2) bottom; Control nitrogen flow, the degree of being with gentle boil; Described nitrogen flow rate is 0.9m
3/ h, the inflated with nitrogen time is 6min;
(5) skim: step (4) is carried out after purifying treatment terminates to aluminium liquid, temperature is made to control at 740 DEG C, leave standstill 10min, allow aluminium slag floating cause aluminium liquid surface, open door of skimming, take off with the scum silica frost of slag-off machine by liquid level surface, when skimming from inside to outside, slightly stop when taking off slope in stove gate, allow the aluminium liquid taken out of pass back in stove, then slag is taken off outside coming out of the stove;
(6) insulation leaves standstill: after above-mentioned each operation completes, and is incubated to leave standstill to process aluminum solutions, and the temperature leaving standstill insulation is 740 DEG C, and the time is not less than 20min, must not stir aluminium alloy solution when leaving standstill insulation; Control holding furnace pitch velocity, make to match with casting rate, avoid neglecting soon, neglect slowly;
(7) degassing processing: aluminium liquid enters degasification tank (4) from holding furnace (2) through dropping down groove, degasification tank (4) transmission system drives graphite rotator to rotate, and uses nitrogen/argon gas to be blown into aluminium liquid via rotor shaft, shower nozzle; The graphite rotator of high speed rotating is broken up the nitrogen/argon gas entering aluminium liquid and is formed a lot of small bubbles, it is made to be dispersed in molten metal, simultaneously rotating rotor also impels hydrogen in molten aluminium, non-metallic inclusion diffusion, make it and bubble contact, bubble by partial pressure difference and surface adsorption principle, absorbs the hydrogen in melt, adsorption and oxidation slag inclusion in the melt, and rise with bubble and taken out of bath surface, aluminium liquid is purified;
(8) insulation filter: step (7) gained aluminium liquid flows out from degasification tank (4), enters thermal-insulation filter box (5) through dropping down groove (1), aluminium liquid through ceramic fiber filter plate, filtering more than 30 μm slag cores;
(9) casting crystallization: aluminium liquid flows into crystallizing wheel (6) startup milling train (8) and carries out level casting, pouring temperature is 700 DEG C, fort and horizontal pouring mouth are watered in the combination of horizontal casting machine configuration level, and avoid eddy current to improve casting idioplasm amount, aluminium liquid is cooled to aluminum alloy ingot again through crystallizing wheel (6) casting;
(10) aluminium bar rolling: the temperature of entering to roll of aluminum alloy ingot, by intermediate frequency heater (7), controls in the scope of 520 DEG C by the shaping aluminum alloy ingot of step (9) ingot casting, aluminium alloy rod go out to roll temperature more than 380 DEG C, carry out quench treatment immediately after going out to roll;
(11) aluminium bar process:
A, around bar take-up: to the aluminium bar after rolling by around lever apparatus around bar;
B, intensive treatment: carry out the hot intensive treatment of timeliness to receiving the aluminium alloy rod sequenced, temperature controls, at 160 DEG C, to take out after enhanced time 3h;
C, aluminum steel draw to be dialled: the aluminium alloy rod intensity through intensive treatment joined in mould to draw in drawing passage and dial, elongation control, between 1.2, carries out Reasonable mould according to different wire diameters;
D, ageing treatment: the aluminum alloy line of drawing carries out ageing strengthening, aging temp 160 DEG C, aging time 3 hours, obtains the aldural line that product electric conductivity is 55%IACS.
The Nitrogen content of described high pure nitrogen be 99.99% and more than.
Step (4) described refining agent formula meter is as follows: the Calcium Fluoride (Fluorspan) of 19 parts, the Repone K of 34 parts, the chlordene methane of 11 parts, the potassium fluoborate of 5 parts, the magnesium fluoride of 15 parts, the wood charcoal powder of 13 parts mix.
The described ceramic fiber screen plate of step (8) is 40pp ceramic filter plate.
Above-mentioned is only to summary of the present invention and displaying.This invention is not limited thereto; unless appended requirement is defined to some extent; those skilled in the art are under the guidance of this specification sheets; obviously can adjust formula for a product, processing parameter and delete some processes link; thus make the wire product in other field applicable, these are all within protection of the present invention.
Claims (7)
1. an electric conductivity is the preparation method of the aldural line of 55%IACS, described electric conductivity is that the formula rate of the aldural line of 55%IACS is as follows by weight percentage: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, all the other are aluminium; It is characterized in that the step of described method is as follows:
(1) Material selec-tion: by weight percentage:
The selection of a, aluminium ingot: by Si≤0.16% in the aluminium liquid of aluminium ingot melting; Fe≤0.20%; Cu≤0.01%; Ti+Mn+Cr+V≤0.02%; Other foreign matter content≤0.03%; All the other are aluminium;
B, ferro-aluminum master alloy: Fe 5%; Si≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
C, aluminium silicon master alloy: Si 10%; Fe≤0.2%; Cu≤0.1%; Ti+Mn+Cr+V≤0.1%; Other foreign matter content≤0.03%; All the other are aluminium;
D, aluminium boron master alloy: B 3%; Si≤0.2%; Fe≤0.4%; Cu≤0.01%; All the other foreign matter content≤0.03%; All the other are aluminium;
E, aluminium ytterbium rare earth intermediate alloy: Yb 5%; Si≤0.2%; Fe≤0.2%; Cu≤0.1%; All the other foreign matter content≤0.03%; All the other are aluminium;
F, magnesium ingot: Si≤0.005% in selected pure magnesium ingot; Fe≤0.004%; Cu≤0.003%; Ti+Mn+Cr+V≤0.02%; Other foreign matter content≤0.03%; All the other are magnesium;
(2) aluminium liquid melting: by weight: get aluminium ingot 93.55-95.25 part that step (1) selects, ferro-aluminum master alloy 0.1-0.8 part, aluminium silicon master alloy 3.25-4.75 part adds in molten aluminium stove and melt; Temperature of fusion is 690-730 DEG C, and smelting time is 1-3h; Get aluminium boron master alloy 0.42-0.65 part and aluminium ytterbium rare earth intermediate alloy 0.68-0.98 part, drop down continuous uniform in groove from molten aluminium stove to holding furnace and add;
After the fusing of aluminium liquid terminates completely, the temperature of aluminum liquid in holding furnace is controlled at 730-750 DEG C, starts when temperature of aluminum liquid stablizes 730-750 DEG C to add magnesium ingot 0.62-0.69 part;
(3) aluminium liquid composition adjustment: by weight percentage: quick on-the-spot sample analysis is carried out to aluminium liquid with direct-reading spectrometer, monitored and adjusted each constituent content, guarantee whole stove aluminium liquid uniform composition, the content of each element is controlled: iron 0.16%-0.22%, silicon 0.48%-0.54%, magnesium 0.62%-0.67%, boron 0.01%-0.02%, ytterbium 0.02%-0.05%, all the other are aluminium;
(4) purifying treatment: step (3) gained temperature of aluminum liquid is warming up to 730-750 DEG C, refining treatment is carried out to aluminium liquid; Be carrier stainless steel tube with high pure nitrogen is blown into the refining agent that consumption is furnace charge total mass 0.1%-0.5% in aluminium liquid bottom holding furnace; Control nitrogen flow, the degree of being with gentle boil; Described nitrogen flow rate is 0.7-1m
3/ h, the inflated with nitrogen time is 5-10min;
(5) skim: step (4) is carried out after purifying treatment terminates to aluminium liquid, temperature is made to control at 720-750 DEG C, leave standstill 5-10min, aluminium slag is allowed to be floated to aluminium liquid surface, open door of skimming, take off with the scum silica frost of slag-off machine by liquid level surface, when skimming from inside to outside, slightly stop when taking off slope in stove gate, allow the aluminium liquid taken out of pass back in stove, then slag is taken off outside coming out of the stove;
(6) insulation leaves standstill: after above-mentioned each operation completes, and be incubated aluminum solutions and leave standstill process, the temperature leaving standstill insulation is 730-750 DEG C, and the time is not less than 20min, must not stir aluminium alloy solution again when leaving standstill insulation; Control holding furnace pitch velocity, make to match with casting rate, avoid neglecting soon, neglect slowly;
(7) degassing processing: aluminium liquid enters degasification tank from holding furnace through dropping down groove, degasification tank transmission system drives graphite rotator to rotate, and uses nitrogen/argon gas to be blown into aluminium liquid via rotor shaft, shower nozzle; The graphite rotator of high speed rotating is broken up the nitrogen/argon gas entering aluminium liquid and is formed a lot of small bubbles, it is made to be dispersed in molten metal, simultaneously rotating rotor also impels hydrogen in molten aluminium, non-metallic inclusion diffusion, make it and bubble contact, bubble by partial pressure difference and surface adsorption principle, absorbs the hydrogen in melt, adsorption and oxidation slag inclusion in the melt, and rise with bubble and taken out of bath surface, aluminium liquid is purified;
(8) insulation filter: step (7) gained aluminium liquid flows out from degasification tank, enters insulation filtration unit through dropping down groove, aluminium liquid through ceramic fiber filter plate, filtering more than 30 μm slag cores;
(9) casting crystallization: aluminium liquid flows into crystallizing wheel startup continuous mill and carries out level casting, pouring temperature is 690-710 DEG C, horizontal casting machine configuration level combination casting ladle and horizontal pouring mouth, avoid eddy current to improve casting idioplasm amount, aluminium liquid is cooled to aluminum alloy ingot again through crystallizing wheel casting;
(10) aluminium bar rolling: the temperature of entering to roll of aluminum alloy ingot, by intermediate frequency heater, controls in the scope of 490-520 DEG C by the shaping aluminum alloy ingot of step (9) ingot casting, aluminium alloy rod go out to roll temperature more than 350 DEG C, carry out quench treatment immediately after going out to roll;
(11) aluminium bar process:
A, around bar take-up: to the aluminium bar after rolling by around lever apparatus around bar;
B, intensive treatment: the aluminium alloy rod good to take-up carries out the hot intensive treatment of timeliness, and temperature controls at 145-160 DEG C, takes out after enhanced time 3-5h;
C, aluminum steel drawing: the aluminium alloy rod through intensive treatment is joined drawing in mould in drawing passage, and elongation control, between 1.2-1.3, carries out Reasonable mould according to different wire diameters;
D, ageing treatment: the aluminum alloy line of drawing carries out ageing strengthening, aging temp 145-160 DEG C, aging time 3-5 hour, obtain the aldural line that product electric conductivity is 55%IACS.
2. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: the Nitrogen content of described high pure nitrogen be 99.99% and more than.
3. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: step (4) described refining agent formula is as follows by weight percentage: the chlordene methane of the Calcium Fluoride (Fluorspan) of 18%-22%, the Repone K of 32%-36%, 8%-12%, the potassium fluoborate of 5%-6%, the magnesium fluoride of 12%-16%, the wood charcoal powder of 10%-15% mix.
4. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: the described ceramic fiber screen plate of step (8) is 40pp ceramic filter plate.
5. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: in step (2), at the end of the melting of aluminium ingot, before adding magnesium ingot, if in holding furnace after aluminium liquefaction completely, aluminium boron master alloy, aluminium ytterbium rare earth intermediate alloy add not yet, then remaining center and the corner of dropping into aluminium liquid with peel uniformly, rear uniform stirring to be melted.
6. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: in step (2), when adding magnesium ingot, magnesium ingot is cut into fritter, then divides 4-8 to criticize to put into bell jar; And rapidly bell jar is pressed in aluminium liquid after preheating a little in stove, then do " rice " font all around and move, until magnesium ingot fritter melts completely.
7. electric conductivity is the preparation method of the aldural line of 55%IACS as claimed in claim 1, it is characterized in that: described aluminum alloy line diameter >=3.5mm, tensile strength >=315MPa, line diameter < 3.5mm, tensile strength >=325MPa, electric conductivity >=55%IACS, unit elongation >=3%.
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| CN115595459B (en) * | 2022-09-19 | 2023-09-12 | 江苏中天科技股份有限公司 | Preparation method of high-strength high-conductivity aluminum alloy monofilament and aluminum alloy monofilament |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105603268A (en) * | 2016-01-11 | 2016-05-25 | 湖北莲花电力母线制造有限公司 | Manufacturing method of high-strength and high-conductivity aluminum-magnesium-silicon alloy contact tube bus |
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