CN104213003B - A kind of conductance is middle strength aluminum alloy monofilament of 61%IACS and preparation method thereof - Google Patents
A kind of conductance is middle strength aluminum alloy monofilament of 61%IACS and preparation method thereof Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000005275 alloying Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 23
- 239000004411 aluminium Substances 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 238000005491 wire drawing Methods 0.000 claims description 7
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 10
- 229910052761 rare earth metal Inorganic materials 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 150000002910 rare earth metals Chemical class 0.000 description 7
- 238000001192 hot extrusion Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
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Abstract
The invention provides the preparation method of the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS, by adding micro-alloying elements Si, Ti, V, Mo, La, Be, adjust the content of each composition, and control impurity content in alloy, and the microstructure of alloy is adjusted by Technology for Heating Processing, prepare the middle strength aluminum alloy monofilament with high conductivity.Test result indicate that, conductance prepared by the present invention be the tensile strength of the middle strength aluminum alloy monofilament of 61%IACS be 250MPa, elongation percentage is 3.5%.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, particularly relate to the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS
And preparation method thereof.
Background technology
Along with fast development and the electricity needs of China's economic construction rise year by year, how to make full use of existing line and walk
Much more as far as possible corridor and line facility, carry electricity, reduce line loss, and raising power transmission efficiency has become operation power department and must take into
Problem.
At present, the present situation of China's overhead transmission line conductor is based on steel-cored aluminium strand, according to increasing conductor cross-section
The long-pending heavy in section steel-cored aluminium strand mode that manufactures improves transmission capacity, it is necessary to the shaft tower building higher intensity realizes, and not only increases
Line corridor area and strengthen construction cost, do not meet " resource-conserving, environmentally friendly, new technology, new material, new work
Skill " guilding principle of transmission line construction.
In order to solve the reducing energy consumption of transmission line of electricity, reduce transmission of electricity line loss, improve the circuit life-span, use the complete of high conductivity
Aluminium alloy conductor substitutes steel-cored aluminium strand and realizes one of the trend that transmission line of electricity energy-saving and cost-reducing is development.But domestic high-strength full aluminium
Alloy lead wire conductance is relatively low, and line loss is bigger；And though strong all aluminum alloy conductor conductance is than high-strength all aluminum alloy conductor in domestic
Having promoted, but complex manufacturing, cost is high, product combination property with abroad there is also bigger gap.
In prior art, aluminium alloy and preparation method thereof has obtained reporting widely, such as, and Application No.
The Chinese patent literature of 201010290234.6 reports a kind of special soft aluminium alloy conductor and preparation method thereof, with percentage by weight
Meter, consisting of of this aluminum-alloy conductor material: the Fe of 0.3～1.5wt%, the Be of 0.001～0.3wt%, 0.005
～the Cu of 0.6wt %, the rare earth of 0.1～1.5wt %, the content≤0.08wt% of Si, inevitable impurity
Total content≤0.15wt%, remaining is aluminium.The Chinese patent literature of Application No. 201010286764.3 reports a kind of cable
With heat resistant type aluminum-alloy conductor material and preparation method thereof, the composition of this aluminium alloy and weight percentage be: 0.3～
The Mg of Cu, 0.01～the 0.3wt% of the Fe of 1.0wt %, 0.01～0.3wt %, one in Ca, Mo, Sb,
Two or three, total amount is 0.01～0.3wt%, and the rare earth element of 0.05～0.8wt%, rare earth element is by Sc, Y
With one or more compositions in Er, Si≤0.1wt%, other content of impurities≤0.15wt%, remaining is Al.But
It is that conductance and the tensile strength of the above-mentioned aluminium alloy reported are relatively low, therefore, in exploitation high conductivity (>=59.2%IACS)
Strength aluminum alloy conductor material and wire thereof are the trend of current domestic all aluminum alloy conductor technology development and technology urgently to be resolved hurrily
A difficult problem.
Summary of the invention
Invention solves the technical problem that the middle strength aluminum alloy monofilament and preparation thereof being to provide a kind of conductance to be 61%IACS
Method, tensile strength is 250MPa, and elongation percentage is 3.5%.
In view of this, the invention provides the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS, including following one-tenth
Point:
Si 0.02 wt% ~ 0.09 wt%；
Ti 0.18wt% ~ 0.35 wt%；
V 0.05 wt% ~ 0.12wt%；
Mo 0.08 wt% ~ 0.15wt%；
La 0.1 wt% ~ 0.2 wt%；
Be 0.01 wt% ~ 0.2wt%；
Surplus is Al and inevitable impurity.
Preferably, including following component:
Si 0.04 wt% ~ 0.08 wt%；
Ti 0.2wt% ~ 0.3 wt%；
V 0.08 wt% ~ 0.12wt%；
Mo 0.09 wt% ~ 0.14wt%；
La 0.12 wt% ~ 0.17 wt%；
Be 0.05 wt% ~ 0.1wt%；
Surplus is Al and inevitable impurity.
Preferably, including following component:
Si 0.05 wt% ~ 0.07 wt%；
Ti 0.22wt% ~ 0.28 wt%；
V 0.09 wt% ~ 0.11wt%；
Mo 0.1 wt% ~ 0.14wt%；
La 0.14 wt% ~ 0.16 wt%；
Be 0.07 wt% ~ 0.09wt%；
Surplus is Al and inevitable impurity.
Accordingly, the present invention also provides for the preparation method of the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS, including
Following steps:
Step a) is sequentially added into Si, Ti, V, Mo, La, Be after being melted by aluminium ingot at 700～740 DEG C, removes after stirring
Hydrogen, slagging-off, at 700～740 DEG C, alloying 30～70min, obtain mixed liquor；
Step b) is incubated after mould is preheated to 220～240 DEG C, prepares aluminium in described mixed liquor casting to mould
Ingot, obtains aluminium alloy rod after hot extrusion；
Described aluminium alloy rod is carried out wire drawing by step c), obtains the middle strength aluminum alloy monofilament of high conductivity.
Preferably, in step a, mixing time is 8 ~ 20min.
Preferably, in step a, alloying temperature is 720～740 DEG C.
Preferably, in step a, alloying temperature is 730～740 DEG C.
Preferably, in step a, alloying time is 40～60min.
Preferably, in step b, the preheating temperature of mould is 230～240 DEG C.
Preferably, in step b, temperature retention time is 5 ~ 20min.
The invention provides the preparation method of the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS, including following step
Rapid: step a) will aluminium ingot melt after at 700～740 DEG C, be sequentially added into Si, Ti, V, Mo, La, Be, dehydrogenation after stirring, remove
Slag, at 700～740 DEG C, alloying 30～70min, obtain mixed liquor；Step b) mould is preheated to 220～
It is incubated after 240 DEG C, in described mixed liquor casting to mould, prepares aluminium ingot, after hot extrusion, obtain aluminium alloy rod；Step c) is by institute
State aluminium alloy rod and carry out wire drawing, obtain middle strength aluminum alloy monofilament.Compared with prior art, the present invention is by adding microalloying
Elements Si, Ti, V, Mo, La, Be, adjust the content of each composition, and control impurity content in alloy, and by heat at
Science and engineering skill adjusts the microstructure of alloy, prepares the middle strength aluminum alloy monofilament with high conductivity.Test result indicate that,
Conductance prepared by the present invention be the tensile strength of the middle strength aluminum alloy monofilament of 61%IACS be 250MPa, elongation percentage is 3.5%.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but
Should be appreciated that these describe simply as to further illustrate the features and advantages of the present invention rather than to the claims in the present invention
Limit.
The embodiment of the invention discloses the middle strength aluminum alloy monofilament that a kind of conductance is 61%IACS, including following component:
Si 0.02 wt% ~ 0.09 wt%；
Ti 0.18wt% ~ 0.35 wt%；
V 0.05 wt% ~ 0.12wt%；
Mo 0.08 wt% ~ 0.15wt%；
La 0.1 wt% ~ 0.2 wt%；
Be 0.01 wt% ~ 0.2wt%；
Surplus is Al and inevitable impurity.
Preferably, described middle strength aluminum alloy monofilament includes following component:
Si 0.04 wt% ~ 0.08 wt%；
Ti 0.2wt% ~ 0.3 wt%；
V 0.08 wt% ~ 0.12wt%；
Mo 0.09 wt% ~ 0.14wt%；
La 0.12 wt% ~ 0.17 wt%；
Be 0.05 wt% ~ 0.1wt%；
Surplus is Al and inevitable impurity.
It is furthermore preferred that described middle strength aluminum alloy monofilament includes following component:
Si 0.05 wt% ~ 0.07 wt%；
Ti 0.22wt% ~ 0.28 wt%；
V 0.09 wt% ~ 0.11wt%；
Mo 0.1 wt% ~ 0.14wt%；
La 0.14 wt% ~ 0.16 wt%；
Be 0.07 wt% ~ 0.09wt%；
Surplus is Al and inevitable impurity.
Accordingly, the present invention also provides for the middle strength aluminum alloy that the conductance described in a kind of technique scheme is 61%IACS
The preparation method of monofilament, comprises the following steps:
Step a) is sequentially added into Si, Ti, V, Mo, La, Be after being melted by aluminium ingot at 700～740 DEG C, removes after stirring
Hydrogen, slagging-off, at 700～740 DEG C, alloying 30～70min, obtain mixed liquor；
Step b) is incubated after mould is preheated to 220～240 DEG C, prepares aluminium in described mixed liquor casting to mould
Ingot, obtains aluminium alloy rod after hot extrusion；
Described aluminium alloy rod is carried out wire drawing by step c), obtains the middle strength aluminum alloy monofilament of high conductivity.
From technique scheme it can be seen that the present invention is by adding micro-alloying elements Si, Ti, V, Mo, La, Be,
Adjust the content of each composition, and control impurity content in alloy, and adjust the micro-of alloy by Technology for Heating Processing
See tissue, prepare the middle strength aluminum alloy monofilament with high conductivity.
Wherein, silicon is one of the most common alloying element of aluminium alloy, and silicon can improve casting character and the welding of aluminium alloy
Mobility, moreover it is possible to enable aluminum alloy to higher mechanical property, can form some compounds in the alloy, make alloy become due to it
Heat-treatable strengthened.Along with Si content raises, the electrical conductivity of alloy declines.This is owing to improving Si content in alloy,
In aluminum substrate, free Si quantity increases, and Si is semiconductor, much higher compared with the resistivity of aluminum substrate, therefore the carrying of Si content
Low-alloyed electrical conductivity, drops in the high effective conductive cross-sectional area reducing aluminum substrate.
Ti, V have crystal grain thinning, improve aluminium alloy room temperature tensile intensity and improve the effect of heat resistance.
Mo have elevated temperature strength is good, hardness is high, density is big, resistance to corrosion is strong, thermal coefficient of expansion is little, good conduction and
The characteristics such as heat conduction.
Rare Earth Lanthanum La plays good purification and impurity removal effect in aluminium alloy monofilament, and before adding rare earth, impurity is many with trip
Existing from state, add after rare earth, rare earth and the objectionable impurities being solid-solution in aluminium define stable intermetallic compound, and
Crystal boundary separates out, and reduces impurity element solid solubility in the base, thus improves the electric conductivity of aluminium.But the increase meeting of content of rare earth
The tensile strength making bus material first raises and reduces afterwards, in order to reach maximum tensile strength and the best electric conductivity, preferably controls
The consumption of Rare Earth Lanthanum La processed.
Be effect common with other trace elements, improves the mechanical performance of aluminium alloy monofilament, and corrosion resistance is good, also protects
Hold the highest electric conductivity.
During the middle strength aluminum alloy monofilament that preparation conductance is 61%IACS, in step a mixing time be preferably 8 ~
20min, more preferably 10 ~ 20min, more preferably 12 ~ 18min；Alloying temperature is preferably 730～740 DEG C, more preferably
735～740 DEG C；Alloying time is preferably 40～60min, more preferably 50～60min, more preferably 50～
55min。
In step b, the preheating temperature of mould is preferably 230～240 DEG C, more preferably 232～238 DEG C, more preferably
234～236 DEG C；Temperature retention time is preferably 5 ~ 20min, more preferably 8 ~ 18min, more preferably 12 ~ 16min.
In order to be further appreciated by the present invention, the technical scheme provided the present invention below in conjunction with embodiment is carried out specifically
Bright, protection scope of the present invention is not limited by the following examples.
Raw material and chemical reagent that the embodiment of the present invention uses are commercial.
Embodiment 1
Conductance prepared by the present embodiment is that the composition of the middle strength aluminum alloy monofilament of 61%IACS is as follows:
Si 0.06wt%；
Ti 0.26 wt%；
V 0.1 wt%；
Mo 0.12wt%；
La 0.15wt%；
Be 0.08%；
Surplus is Al.
Preparation method is as follows:
Step a) will aluminium ingot melt after at 735 DEG C, be sequentially added into Si, Ti, V, Mo, La, Be, dehydrogenation after stirring, slagging-off,
Alloying 60min at 735 DEG C, obtains mixed liquor；
Step b) is incubated 20min after mould is preheated to 230 DEG C, prepares aluminium ingot in described mixed liquor casting to mould,
Aluminium alloy rod is obtained after hot extrusion；
Described aluminium alloy rod is carried out wire drawing by step c), obtains middle strength aluminum alloy monofilament.
The middle strength aluminum alloy monofilament preparing the present embodiment carries out performance detection, and result shows: conductance is 61% IACS
(20 DEG C), tensile strength are 250MPa, and elongation percentage is 3.5%.
Embodiment 2
Conductance prepared by the present embodiment is that the composition of the middle strength aluminum alloy monofilament of 61%IACS is as follows:
Si 0.08wt%；
Ti 0.20 wt%；
V 0.12 wt%；
Mo 0.15wt%；
La 0.18wt%；
Be 0.08%；
Surplus is Al.
Preparation method is as follows:
Step a) will aluminium ingot melt after at 738 DEG C, be sequentially added into Si, Ti, V, Mo, La, Be, dehydrogenation after stirring, slagging-off,
Alloying 60min at 735 DEG C, obtains mixed liquor；
Step b) is incubated 20min after mould is preheated to 235 DEG C, prepares aluminium ingot in described mixed liquor casting to mould,
Aluminium alloy rod is obtained after hot extrusion；
Described aluminium alloy rod is carried out wire drawing by step c), obtains middle strength aluminum alloy monofilament.
The middle strength aluminum alloy monofilament preparing the present embodiment carries out performance detection, and result shows: conductance is 61% IACS
(20 DEG C), tensile strength are 251MPa, and elongation percentage is 3.5%.
Embodiment 3
Conductance prepared by the present embodiment is that the composition of the middle strength aluminum alloy monofilament of 61%IACS is as follows:
Si 0.06wt%；
Ti 0.35 wt%；
V 0.06 wt%；
Mo 0.08wt%；
La 0.15wt%；
Be 0.08%；
Surplus is Al.
Preparation method is as follows:
Step a) will aluminium ingot melt after at 733 DEG C, be sequentially added into Si, Ti, V, Mo, La, Be, dehydrogenation after stirring, slagging-off,
Alloying 60min at 733 DEG C, obtains mixed liquor；
Step b) is incubated 20min after mould is preheated to 230 DEG C, prepares aluminium ingot in described mixed liquor casting to mould,
Aluminium alloy rod is obtained after hot extrusion；
Described aluminium alloy rod is carried out wire drawing by step c), obtains middle strength aluminum alloy monofilament.
The middle strength aluminum alloy monofilament preparing the present embodiment carries out performance detection, and result shows: conductance is 61% IACS
(20 DEG C), tensile strength are 251MPa, and elongation percentage is 3.6%.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. a conductance is the middle strength aluminum alloy monofilament of 61%IACS, it is characterised in that include following component:
Si 0.02 wt% ~ 0.09 wt%；
Ti 0.18wt% ~ 0.35 wt%；
V 0.05 wt% ~ 0.12wt%；
Mo 0.08 wt% ~ 0.15wt%；
La 0.1 wt% ~ 0.2 wt%；
Be 0.01 wt% ~ 0.2wt%；
Surplus is Al and inevitable impurity.
Middle strength aluminum alloy monofilament the most according to claim 1, it is characterised in that include following component:
Si 0.04 wt% ~ 0.08 wt%；
Ti 0.2wt% ~ 0.3 wt%；
V 0.08 wt% ~ 0.12wt%；
Mo 0.09 wt% ~ 0.14wt%；
La 0.12 wt% ~ 0.17 wt%；
Be 0.05 wt% ~ 0.1wt%；
Surplus is Al and inevitable impurity.
Middle strength aluminum alloy monofilament the most according to claim 2, it is characterised in that include following component:
Si 0.05 wt% ~ 0.07 wt%；
Ti 0.22wt% ~ 0.28 wt%；
V 0.09 wt% ~ 0.11wt%；
Mo 0.1 wt% ~ 0.14wt%；
La 0.14 wt% ~ 0.16 wt%；
Be 0.07 wt% ~ 0.09wt%；
Surplus is Al and inevitable impurity.
4. the conductance described in claim 1 ~ 3 any one is the preparation method of middle strength aluminum alloy monofilament of 61%IACS,
It is characterized in that, comprise the following steps:
Step a) will aluminium ingot melt after at 700～740 DEG C, be sequentially added into Si, Ti, V, Mo, La, Be, dehydrogenation after stirring, remove
Slag, at 700～740 DEG C, alloying 30～70min, obtain mixed liquor；
Step b) is incubated after mould is preheated to 220～240 DEG C, prepares aluminium ingot, heat by described mixed liquor casting to mould
Aluminium alloy rod is obtained after extruding；
Described aluminium alloy rod is carried out wire drawing by step c), obtains middle strength aluminum alloy monofilament.
5. the preparation method as described in claim 4, it is characterised in that in step a, mixing time is 8 ~ 20min.
6. the preparation method as described in claim 4, it is characterised in that in step a, alloying temperature is 720～740 DEG C.
7. the preparation method as described in claim 6, it is characterised in that in step a, alloying temperature is 730～740 DEG C.
8. the preparation method as described in claim 4, it is characterised in that in step a, alloying time is 40～60min.
9. the preparation method as described in claim 4, it is characterised in that in step b the preheating temperature of mould be 230～
240℃。
10. the preparation method as described in claim 4, it is characterised in that in step b, temperature retention time is 5 ~ 20min.
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