CN106868350B - Strong heat-resistant aluminum alloy wire and its manufacture method in one kind - Google Patents

Strong heat-resistant aluminum alloy wire and its manufacture method in one kind Download PDF

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Publication number
CN106868350B
CN106868350B CN201710108338.2A CN201710108338A CN106868350B CN 106868350 B CN106868350 B CN 106868350B CN 201710108338 A CN201710108338 A CN 201710108338A CN 106868350 B CN106868350 B CN 106868350B
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aluminum alloy
alloys
alloy wire
strong heat
resistant aluminum
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CN106868350A (en
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钟广尧
邱小艺
耿晓鹏
张志敏
翟元辉
李志芬
潘耀明
林建清
徐炽明
王顺成
叶和刚
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Guangdong new Yaguang Cable Co.,Ltd.
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GUANGDONG SHINE CABLES CO Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel

Abstract

Strong heat-resistant aluminum alloy wire and its manufacture method in one kind, the composition of strong heat-resistant aluminum alloy wire and mass percent are in described：Fe 0.2~0.4%, Si 0.05~0.07%, Li 0.02~0.04%, Zr 0.015~0.045%, C 0.001~0.003%, RE 0.01~0.03%, surplus are Al and inevitable impurity, impurity is single≤and 0.01%, total amount≤0.05%.Its manufacture method includes stock, melting preparation aluminum alloy melt, furnace refining degasification removal of impurities processing, the processing of online degassing and filtration, continuous casting and rolling and is drawn into line.Strong heat-resistant aluminum alloy wire has the characteristics of conductance height and fine heat-resisting performance in of the present invention, is suitable for manufacturing urban distribution network increase-volume extending capacity reformation and long range large capacity transmission engineering construction aluminium alloy cable, has wide market application foreground.

Description

Strong heat-resistant aluminum alloy wire and its manufacture method in one kind
Technical field
The invention belongs to aluminium alloy conductor manufacturing field, is specifically related in one kind strong heat-resistant aluminum alloy wire and its manufacture Method.
Background technology
Heat-resistant aluminum alloy wire refers to there is resistance plastic deformation and energy of rupture under the long duration of action of temperature and load The aluminium alloy conductor of power.The heat resistance generally use strength retention of heat-resistant aluminum alloy wire is more than 90% to characterize, that is, passes through The tensile strength then returned to after heating at room temperature is able to maintain that more than the 90% of initial value.With the quick hair of national economy Exhibition and the continuous improvement of living standards of the people, the demand sharp increase to electric power, transmission line of electricity increasingly develop to Large Copacity direction, This requires the transmission line capability for increasing wire.At present, the main or traditional steel-cored aluminium strand of the transmission pressure in China, this steel Although core aluminum stranded wire intensity is high, electric energy loss is big, and poor heat resistance, transmission line capability is very restricted.With China city The construction of power network increase-volume extending capacity reformation and long range large capacity transmission engineering, there is an urgent need to the high conductivity for developing new is heat-resisting Aluminium alloy conductor.
The content of the invention
It is an object of the invention to problem and shortage be present for above-mentioned, there is provided a kind of intensity is medium, plasticity is good, conductance Strong heat-resistant aluminum alloy wire and its manufacture method in high, fine heat-resisting performance.
The technical proposal of the invention is realized in this way：
Strong heat-resistant aluminum alloy wire in of the present invention, it is characterized in being made up of the composition of following mass percent：Fe 0.2~0.4%, Si 0.05~0.07%, Li 0.02~0.04%, Zr 0.015~0.045%, C 0.001~ 0.003%, RE 0.01~0.03%, surplus are Al and inevitable impurity, impurity is single≤and 0.01%, total amount≤ 0.05%, wherein the composition of the RE and mass percent are：Pr 15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.
Preferably, strong heat-resistant aluminum alloy wire in of the present invention, is made up of the composition of following mass percent：Fe 0.3%, Si 0.06%, Li 0.03%, Zr 0.03%, C 0.003%, RE 0.02%, surplus is for Al and inevitably Impurity, impurity is single≤and 0.01%, total amount≤0.05%, wherein the composition of the RE and mass percent are：Pr 15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.
The preparation method of strong heat-resistant aluminum alloy wire, is characterized in comprising the following steps in of the present invention：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al- 5Zr-1C alloys and mixed rare earth are as raw material；
Second step：760~780 DEG C by technical pure aluminium ingot heat melt, and add account for raw material gross weight 0.05~ 0.07% instant silicon, 0.2~0.4% Al-10Li alloys, 0.5~1.5% Al-20Fe alloys and 0.1~0.3% Al-10Zr alloys, stirring are fused into aluminum alloy melt；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt, after skimming, addition accounts for raw material gross weight 0.1~0.3% Al-5Zr-1C alloys and 0.01~0.03% mixed rare earth, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 100~120 turns/ The ceramic filter plate that the degasification tank and porosity that minute, argon pressure are 50~60KPa are 30~50ppi carries out online degasification Filter is handled；
5th step：Crystallizing wheel rotate linear velocity be 13~15 ms/min, the condition that finish to gauge speed is 10~12 meter per seconds Under, by aluminum alloy melt continuous casting and rolling into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 4~5%, drawing speed is 5~7 meter per seconds, by aluminium alloy Round bar is drawn into a diameter of 1~3 millimeter of aluminium alloy wire, strong heat-resistant aluminum alloy wire in obtaining.
The present invention compared with prior art, has advantages below：
The room temperature tensile intensity of strong heat-resistant aluminum alloy wire is more than 170MPa in the present invention, and elongation is more than 14%, conduction Rate is more than 61%, and the strength retention after 230 DEG C of continuous heatings 1 hour is more than 90%, has conductance high and heat resistance The characteristics of excellent, it is suitable for manufacturing urban distribution network increase-volume extending capacity reformation and long range large capacity transmission engineering construction aluminium alloy electric Cable, there is wide market application foreground.
Embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, the present invention is made below further detailed Describe in detail bright.
Strong heat-resistant aluminum alloy wire in of the present invention, is made up of the composition of following mass percent：Fe0.2~ 0.4%, Si 0.05~0.07%, Li 0.02~0.04%, Zr 0.015~0.045%, C 0.001~0.003%, RE 0.01~0.03%, surplus is Al and inevitable impurity, impurity is single≤and 0.01%, total amount≤0.05%.
Wherein, optimal composition and mass percent are：Fe 0.3%, Si 0.06%, Li 0.03%, Zr 0.03%, C 0.003%, RE 0.02%, surplus are Al and inevitable impurity, impurity is single≤and 0.01%, total amount≤0.05%.
The composition and mass percent of the RE be：Pr 15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.
Wherein, Fe can form the fabulous Al of heat endurance in aluminium alloy conductor3Fe、Al2FeSi、FeSiAl3、Fe2SiAl8 Etc. superfluous phase, strengthen the intensity and heat resistance of aluminium alloy conductor.Fe contents are higher, and the quantity of superfluous phase is also more, aluminium alloy The intensity and heat resistance of wire are better.But Fe the contents too high plasticity that can also reduce aluminium alloy, anti-stress corrosion performance and fatigue Performance.Because, containing 0.1% Fe, therefore, the Al-20Fe alloys of selection addition 0.5~1.5%, aluminium closes in technical pure aluminium ingot Fe contents are 0.2~0.4% in golden wire, it is preferred that Al-20Fe alloy addition levels are 1%, and Fe contents are in aluminium alloy conductor 0.3%.
Si is in aluminium alloy conductor in addition to solution strengthening effect, it is most important that Si can with aluminium alloy conductor Fe forms the fabulous Al of heat endurance2FeSi、FeSiAl3、Fe2SiAl8Etc. superfluous phase, strengthen the intensity of aluminium alloy conductor and resistance to Hot property.The too high moulding and electric conductivity that can also reduce aluminium alloy conductor of Si contents, therefore, in order to ensure aluminium alloy conductor obtains Enough to intensity, heat resistance and electric conductivity, for the selection of Si contents 0.05~0.07%, optimal Si contents are 0.06%.
Li can separate out the fabulous nano-scale Al of heat endurance in aluminium alloy conductor3Li hardening constituents, Al3Li hardening constituents can With pinning dislocation, subgrain and crystal boundary, the intensity and heat resistance of aluminium alloy conductor are improved.The Li of addition 0.02~0.04% Obvious reinforcing effect is produced to aluminium alloy conductor, it is preferred that Li additions are 0.03%.
Zr can separate out the Al of small and dispersed in aluminium alloy conductor3Zr phases, Al3Zr phases are not decomposed at high temperature, have pinning The effect of dislocation and crystal boundary, transgranular sliding and the sliding of crystal boundary can be hindered, reduce the expansion rate of crackle, improved aluminium alloy and lead The heat resistance of line.But Zr addition can also cause the crystal lattice of aluminum substrate to distort, increase electron scattering so as to reduce conduction Rate.In the case where ensureing the double requirements of the enough heat resistances of aluminium alloy conductor acquisition and electric conductivity, therefore selection addition 0.1~ 0.3% Al-10Zr alloys, 0.01~0.03% Zr is contained in aluminium alloy conductor, optimal, the Al- of selection addition 0.2% 10Zr alloys, contain 0.02% Zr in aluminium alloy conductor.
C is to be added in the form of Al-5Zr-1C alloys in aluminium alloy conductor, and Al-5Zr-1C alloys are by potassium fluorozirconate React to obtain with aluminium liquid with the mixture of carbon dust, substantial amounts of ZrC particles are contained in inside.Al5Zr1C alloys are a kind of new aluminium Alloy grain fining agent, inventor experimental results demonstrate the existing Al5Ti1B and Al5Ti1C alloys tool of, Al5Zr1C alloy ratios Have a stronger grain refining capability, the Al-5Zr-1C alloys of addition 0.1~0.3%, in aluminium alloy conductor containing 0.005~ 0.015% Zr and 0.001~0.003% C, can notable refining aluminum alloy crystal grain, the tissue for improving aluminium alloy conductor is equal Even property, improve the intensity and plasticity of aluminium alloy conductor, it is preferred that Al-5Zr-1C alloy addition levels are 0.2%, are contained in aluminium alloy There are 0.01% Zr and 0.002% C.
RE is the mischmetal containing Pr, Nd, Pm, Sm, Gd totally 5 kinds of LREEs, the physical chemistry of LREE Property is active, can with the impurity element such as the hydrogen in aluminum alloy melt, oxygen, manganese, zinc, chromium reaction generation high-melting-point, high stability it is dilute Earth compounds, there is deep purifying effect to aluminum alloy melt, impurity element can be eliminated mechanical property and electric conductivity are harmful to Influence.The characteristics of fusing point is high, hardness is high and heat endurance is good in addition, the rare earth compound formed has, segregation is in phase boundary and crystalline substance Boundary can improve phase boundary and the intensity and creep resisting ability of crystal boundary, further improve aluminium alloy conductor intensity and heat resistance.Inventor Lot of experiments prove, add the effect ratio containing Pr, Nd, Pm, Sm, Gd mischmetal of totally 5 kinds of LREEs and add Add a kind of or a few LREE effect more preferable, therefore, the mixed rare earth of selection addition 0.01~0.03% is excellent Choosing, mixed rare earth addition is 0.02%.
Present invention also offers the manufacture method of strong heat-resistant aluminum alloy wire in this, specifically comprise the steps of：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al- 5Zr-1C alloys and mixed rare earth are as raw material；
Second step：760~780 DEG C by technical pure aluminium ingot heat melt, and add account for raw material gross weight 0.05~ 0.07% instant silicon, 0.2~0.4% Al-10Li alloys, 0.5~1.5% Al-20Fe alloys and 0.1~0.3% Al-10Zr alloys, stirring are fused into aluminum alloy melt；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt, after skimming, addition accounts for raw material gross weight 0.1~0.3% Al-5Zr-1C alloys and 0.01~0.03% mixed rare earth, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 100~120 turns/ The ceramic filter plate that the degasification tank and porosity that minute, argon pressure are 50~60KPa are 30~50ppi carries out online degasification Filter is handled；
5th step：Crystallizing wheel rotate linear velocity be 13~15 ms/min, the condition that finish to gauge speed is 10~12 meter per seconds Under, by aluminum alloy melt continuous casting and rolling into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 4~5%, drawing speed is 5~7 meter per seconds, by aluminium alloy Round bar is drawn into a diameter of 1~3 millimeter of aluminium alloy wire, strong heat-resistant aluminum alloy wire in obtaining.
The manufacture method of strong heat-resistant aluminum alloy wire in the present invention, from technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al-5Zr-1C alloys and mixed rare earth as raw material, by optimize Fe, Si, Li, Zr content, after first passing around furnace refining degasification removal of impurities processing, Al-5Zr-1C alloys and mixed rare earth are added, favorably The crystal grain refinement and mixed rare earth of aluminum alloy melt are made to the deep purifying of aluminum alloy melt in giving full play to Al-5Zr-1C alloys With finally passing through the online degasification of chute and filtration treatment again, it can be ensured that obtain the aluminum alloy melt of high-cleanness, enable aluminum alloy to wire The characteristics of obtaining high conductance and fine heat-resisting performance.
In order to more describe strong heat-resistant aluminum alloy wire and its manufacture method in the present invention in detail, several realities are exemplified below Example is applied to be further described.
Embodiment 1：
Strong heat-resistant aluminum alloy wire, is made up of following component and mass percent in of the present invention：Fe 0.2%, Si 0.05%, Li 0.02%, Zr 0.015%, C 0.001%, RE 0.01%, surplus are Al and inevitable impurity, impurity Single≤0.01%, total amount≤0.05%, wherein the composition of the RE and mass percent are：Pr15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.Manufacture method of strong heat-resistant aluminum alloy wire is as follows in this：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al- 5Zr-1C alloys and mixed rare earth are as raw material；
Second step：Technical pure aluminium ingot is heated at 760 DEG C and melted, and adds and accounts for the instant of raw material gross weight 0.05% Silicon, 0.2% Al-10Li alloys, 0.5% Al-20Fe alloys and 0.1% Al-10Zr alloys, stirring are fused into aluminium alloy Liquid；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt with carbon trichloride, after skimming, addition accounts for former material The Al-5Zr-1C alloys and 0.01% mixed rare earth of material gross weight 0.1%, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 100 revs/min, The ceramic filter plate that the degasification tank and porosity that argon pressure is 60KPa are 30ppi carries out online degassing and filtration processing；
5th step：It is 15 ms/min, under conditions of finish to gauge speed is 12 meter per seconds to rotate linear velocity in crystallizing wheel, and aluminium is closed Golden liquid continuous casting and rolling is into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 5%, drawing speed is 7 meter per seconds, Aluminum alloy round bar is drawn A diameter of 1 millimeter of aluminium alloy wire is pulled into, strong heat-resistant aluminum alloy wire in obtaining.
Embodiment 2：
Strong heat-resistant aluminum alloy wire, is made up of following component and mass percent in of the present invention：Fe 0.3%, Si 0.06%, Li 0.03%, Zr 0.03%, C 0.002%, RE 0.02%, surplus are Al and inevitable impurity, impurity Single≤0.01%, total amount≤0.05%, wherein the composition of the RE and mass percent are：Pr 15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.In strong heat-resistant aluminum alloy wire manufacture method it is as follows：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al- 5Zr-1C alloys and mixed rare earth are as raw material；
Second step：Technical pure aluminium ingot is heated at 770 DEG C and melted, and adds and accounts for the instant of raw material gross weight 0.06% Silicon, 0.03% Al-10Li alloys, 1% Al-20Fe alloys and 0.2% Al-10Zr alloys, stirring are fused into aluminium alloy Liquid；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt with carbon trichloride, after skimming, addition accounts for former material The Al-5Zr-1C alloys and 0.02% mixed rare earth of material gross weight 0.2%, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 110 revs/min, The ceramic filter plate that the degasification tank and porosity that argon pressure is 55KPa are 40ppi carries out online degassing and filtration processing；
5th step：It is 14 ms/min, under conditions of finish to gauge speed is 11 meter per seconds to rotate linear velocity in crystallizing wheel, and aluminium is closed Golden liquid continuous casting and rolling is into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 4.5%, drawing speed is 6 meter per seconds, by Aluminum alloy round bar A diameter of 2 millimeters of aluminium alloy wire is drawn into, strong heat-resistant aluminum alloy wire in obtaining.
Embodiment 3：
Strong heat-resistant aluminum alloy wire, is made up of following component and mass percent in of the present invention：Fe 0.4%, Si 0.07%, Li 0.04%, Zr 0.045%, C 0.003%, RE 0.03%, surplus are Al and inevitable impurity, impurity Single≤0.01%, total amount≤0.05%, wherein the composition of the RE and mass percent are：Pr15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.In strong heat-resistant aluminum alloy wire manufacture method it is as follows：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al- 5Zr-1C alloys and mixed rare earth are as raw material；
Second step：Technical pure aluminium ingot is heated at 780 DEG C and melted, and adds and accounts for the instant of raw material gross weight 0.07% Silicon, 0.4% Al-10Li alloys, 1.5% Al-20Fe alloys and 0.2% Al-10Zr alloys, stirring are fused into aluminium alloy Liquid；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt with carbon trichloride, after skimming, addition accounts for former material The Al-5Zr-1C alloys and 0.03% mixed rare earth of material gross weight 0.3%, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 120 revs/min, The ceramic filter plate that the degasification tank and porosity that argon pressure is 50KPa are 50ppi carries out online degassing and filtration processing；
5th step：It is 13 ms/min, under conditions of finish to gauge speed is 10 meter per seconds to rotate linear velocity in crystallizing wheel, and aluminium is closed Golden liquid continuous casting and rolling is into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 4%, drawing speed is 5 meter per seconds, Aluminum alloy round bar is drawn A diameter of 3 millimeters of aluminium alloy wire is pulled into, strong heat-resistant aluminum alloy wire in obtaining.
Sampled in embodiment 1-3 on strong heat-resistant aluminum alloy wire, room temperature is carried out on DNS200 type electronic tensile machines Stretching, draw speed is 2mm/min, the room temperature tensile intensity and elongation of strong heat-resistant aluminum alloy wire in detection, as a result such as table 1 It is shown.The conductance of strong heat-resistant aluminum alloy wire in being determined on QJ44 type direct-flow double bridges, as a result as shown in table 1.By in Strong heat-resistant aluminum alloy wire is subsequently cooled to room temperature in 230 DEG C of continuous heatings 1 hour, enterprising in DNS200 type electronic tensile machines Row room temperature tensile, draw speed are 2mm/min, the tensile strength of strong heat-resistant aluminum alloy wire in detection, with the tensile strength values Compared with initial value, the strength retention of strong heat-resistant aluminum alloy wire in detection, as shown in table 1.
Room temperature tensile mechanical property, conductance and the strength retention of the embodiment 1-3 aluminium alloy conductors of table 1
Tensile strength/MPa Elongation/% Conductance/%IACS Strength retention/%
Embodiment 1 173.1 16.9 61.9 90.8
Embodiment 2 186.4 15.7 61.6 91.4
Embodiment 3 192.7 14.4 61.3 91.9
Can be seen from the testing result of table 1, the room temperature tensile intensity of strong heat-resistant aluminum alloy wire is more than 170MPa in the present invention, Elongation is more than 14%, and conductance is more than 61%, and the strength retention after 230 DEG C of continuous heatings 1 hour is more than 90%.Have The advantages of conductance height and good heat resistance, it is suitable for manufacturing urban distribution network increase-volume extending capacity reformation and long range large capacity transmission work Cheng Jianshe aluminium alloy cables, there is wide market application foreground.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area Within the scope of the claims in the present invention limit.

Claims (1)

1. the manufacture method of strong heat-resistant aluminum alloy wire in a kind of, it is characterised in that comprise the following steps：
The first step：From technical pure aluminium ingot, instant silicon, Al-10Li alloys, Al-20Fe alloys, Al-10Zr alloys, Al-5Zr- 1C alloys and mixed rare earth are as raw material；
Second step：Technical pure aluminium ingot is heated at 760~780 DEG C and melted, and adds and accounts for raw material gross weight 0.05~0.07% Instant silicon, 0.2~0.4% Al-10Li alloys, 0.5~1.5% Al-20Fe alloys and 0.1~0.3% Al-10Zr Alloy, stirring are fused into aluminum alloy melt；
3rd step：Furnace refining degasification removal of impurities processing is carried out to aluminum alloy melt, after skimming, addition account for raw material gross weight 0.1~ 0.3% Al-5Zr-1C alloys and 0.01~0.03% mixed rare earth, the composition that stirring enables aluminum alloy to liquid are uniform；
4th step：Aluminum alloy melt is flowed successively through the graphite rotator rotary speed that is arranged on chute for 100~120 revs/min, The ceramic filter plate that the degasification tank and porosity that argon pressure is 50~60KPa are 30~50ppi is carried out at online degassing and filtration Reason；
5th step：It is 13~15 ms/min, under conditions of finish to gauge speed is 10~12 meter per seconds to rotate linear velocity in crystallizing wheel, will Aluminum alloy melt continuous casting and rolling is into a diameter of 9.5 millimeters of Aluminum alloy round bar；
6th step：Under conditions of passage drawing deformation amount is 4~5%, drawing speed is 5~7 meter per seconds, by Aluminum alloy round bar Be drawn into a diameter of 1~3 millimeter of aluminium alloy wire, strong heat-resistant aluminum alloy wire in obtaining, in this strong heat-resistant aluminum alloy wire by The composition composition of following mass percent：Fe 0.2~0.4%, Si 0.05~0.07%, Li0.02~0.04%, Zr 0.015~0.045%, C 0.001~0.003%, RE 0.01~0.03%, surplus are Al and inevitable impurity, impurity Single≤0.01%, total amount≤0.05%, wherein the composition of the RE and mass percent are：Pr 15.3%, Nd 20.5%, Pm 11.2%, Sm 23.8%, Gd 29.2%.
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