CN106435235A - Preparation method for heat-resistant electrician round aluminum rod - Google Patents
Preparation method for heat-resistant electrician round aluminum rod Download PDFInfo
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- CN106435235A CN106435235A CN201610908905.8A CN201610908905A CN106435235A CN 106435235 A CN106435235 A CN 106435235A CN 201610908905 A CN201610908905 A CN 201610908905A CN 106435235 A CN106435235 A CN 106435235A
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
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Abstract
The invention provides a preparation method for a heat-resistant electrician round aluminum rod. The preparation method comprises the following steps that aluminum-boron intermediate alloy, aluminum-zirconium intermediate alloy and rare earth intermediate alloy are added into electrolytic aluminum liquid, an aluminum solution is obtained through stirring, the mass fraction of boron in the aluminum solution is 0.006-0.01%, the mass fraction of zirconium in the aluminum solution is 0.03-0.18%, and the mass fraction of rare earth in the aluminum solution is 0.10-0.25%; and after the aluminum solution is subjected to refining, still standing, pouring and rolling, the heat-resistant electrician round aluminum rod is obtained. According to the preparation method for the heat-resistant electrician round aluminum rod, the electrolytic aluminum liquid is used as a raw material, melting required by the condition that aluminum ingots are used as raw materials is avoided, and the technological process is shortened, so that the production cost is reduced, and the method is more environmentally friendly; and in addition, the electrolytic aluminum liquid is subjected to boronizing and refining treatment by adding a proper amount of the aluminum-boron intermediate alloy, the aluminum-zirconium intermediate alloy and the rare earth intermediate alloy into the electrolytic aluminum liquid, more uniform refined casting grains are obtained advantageously, and the mechanical performance of the heat-resistant electrician round aluminum rod is improved.
Description
Technical field
The present invention relates to round aluminum rod technical field, it is specifically related to a kind of preparation method of heat-resisting round aluminum rod.
Background technology
Round aluminum rod is mainly used in wires and cables industry, and its electrical property and mechanical performance are all kinds of aluminum core cable and line energy
The no key reached advanced world standards.
In prior art, heat-resisting round aluminum rod generally adopt aluminium ingot, that is, general aluminium ingot and aluminium scrap line first melt, then cast and
Rolling.Need to dissolve because aluminium ingot manufactures heat-resisting round aluminum rod, thus molten stove, continuous casting continuous rolling equipment can be increased, lead to produce
Cost increases.In addition, leading to secondary environmental pollution.
Content of the invention
In view of this, the technical problem to be solved in the present invention is to overcome the defect of prior art, provides a kind of resistance to thermoelectricity
The preparation method of work circle aluminium bar, comprises the following steps：Add aluminum boron intermediate alloy, aluminium zirconium hardener and dilute in electrolytic aluminium liquid
Native intermediate alloy and stir obtain aluminum solution so that in aluminum solution boron mass fraction be 0.006～0.01%, the quality of zirconium is divided
Number is 0.03～0.18%, and the mass fraction of rare earth is 0.10～0.25%；
Above-mentioned aluminum solution is obtained after refine, standing, continuous casting and rolling again heat-resisting round aluminum rod.
Further, the micronutrient levelss of described electrolytic aluminium liquid are below 0.02wt%.
Further, described trace element be titanium, vanadium, manganese, any one or more in chromium.
Further, described refine is specially：By the temperature control of described aluminum solution at 730～750 DEG C, using indifferent gas
Body refining agent is blown in aluminum solution and carries out refining treatment；Then skim.
Further, described refining agent includes KCl, NaCl, cryolite, the ground flux of CaCl composition；During described refine
Between be 15～20min.
Further, the pressure being passed through noble gases is 0.1～0.5Mpa.
Further, described skim after spread one layer of coverture on aluminum solution surface.
Further, the time of described standing is 30～50min.
Further, it is additionally included in line degasification and filter process after described standing and before described continuous casting and rolling.
Further, described casting and rolling process condition includes：Casting temperature be 690～720 DEG C, speed be 7.0～
7.5t/h；The temperature of casting machine cooling water is 30～35 DEG C, and pressure is 0.3～0.35MPa；Entering to roll temperature in the operation of rolling is 450
～500 DEG C, finishing temperature is 200～250 DEG C, and going out linear velocity is 6～10m/s；The temperature of rolling emulsion is 40～50 DEG C.
Compared with prior art, the beneficial effect of the preparation method of a kind of heat-resisting round aluminum rod that the present invention provides is：
(1), with electrolytic aluminium liquid as raw material, it is to avoid the use of aluminium ingot is the fusing needed for raw material, shorten technological process, from
And reduce production cost and more environmental protection.
(2), pass through to add appropriate aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy in electrolytic aluminium liquid
Boronation and micronization processes are carried out to electrolytic aluminium liquid, is conducive to obtaining the casting crystal grain of more uniformly refinement, lifting heat-resisting electrician circle
The mechanical performance of aluminium bar.
(3), further, carried out refine, standing, online degasification and cascade filtration slagging-off before continuous casting and rolling, obtained
The relatively low uniform strand of gas slag content.
Specific embodiment
For the ease of understanding the present invention, the mode with reference to embodiment elaborates to technical scheme,
Elaborate a lot of details in order to fully understand the present invention in the following description.
But the present invention can be much to implement different from alternate manner described here, and those skilled in the art are permissible
Doing similar improvement without prejudice in the case of intension of the present invention, therefore the present invention is not embodied as being limited by following public.
The preparation method of a kind of heat-resisting round aluminum rod of the present invention, comprises the following steps：Add aluminum in electrolytic aluminium liquid
Boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy simultaneously stir and obtain aluminum solution so that the quality of boron is divided in aluminum solution
Number is 0.006～0.01%, and the mass fraction of zirconium is 0.03～0.18%, and the mass fraction of rare earth is 0.10～0.25%；
Above-mentioned aluminum solution is obtained after refine, standing, continuous casting and rolling again heat-resisting round aluminum rod.
Above-mentioned term " electrolytic aluminium liquid " refers to the liquid aluminium of the molten state prepared using the preparation of electrolytic industry method.This
Place, Aluminium Industry method is using cryolite-alumina molten salt electrolysis, is solvent with molten cryolitic, aluminium oxide is made
For solute, using carbon body as anode, aluminium liquid, as negative electrode, after being passed through powerful unidirectional current, at 950～970 DEG C, is being electrolysed
It is electrochemically reacted on the two poles of the earth in groove.
It is to be appreciated that the present invention carries out boronation by adding aluminum boron intermediate alloy in electrolytic aluminium liquid to electrolytic aluminium liquid
Process.Borax treatment is boronising, boronation, boron hardening, and its effect is the method making boron element penetrate into metal surface.Due to steel
It is special that the borided layer being formed on its surface after boronation has wearability, corrosion stability, non-oxidizability and high temperature hardness of height etc.
Performance.Aluminum boron intermediate alloy can be obtained using preparation method known in the art, for example can be using conventional aluminothermy
Reducing process smelting technology, adds the compound of boron in aluminium liquid, using aluminothermic process, boron is reduced.Here the compound of boron can
Think the oxide of boron or the salt (Potassium borofluoride) of boron etc..
It is to be appreciated that the present invention passes through to add aluminium zirconium hardener and rare earth intermediate alloy in electrolytic aluminium liquid to electricity
Solution aluminium liquid carries out micronization processes.Micronization processes are that crystal grain refinement is processed.The effect of micronization processes is that what during solidification, crackle was formed inclines
Tropism is little, can allow using higher casting speed, thus increases the production capacity of melting and Casting Equipment so that in casting
Fusion cold shut does not reduce, and during such machining, the cutting output of metal reduces so that yield rate improves.On the one hand, have all
The casting of even and fine little crystal grain, reduces casting stress so that the plasticity of casting becomes ability raising.Another further aspect, can improve casting and produce
The mechanical performance of product.Described rare earth intermediate alloy is the alloy casting after Al and rare earth element melting.
Specifically, first in holding furnace, add electrolytic aluminium liquid, the temperature control making described electrolytic aluminium liquid is at 750～760 DEG C.
Should heat in advance before adding electrolytic aluminium liquid in this holding furnace, enter stove electrolytic aluminium liquid must not be mixed with clod, sandstone, non-aluminum metal and its
His debris.According to insulation heat size, carry out the shove charge work of electrolytic aluminium liquid, with 5 centimeters of fire door lower edge of scratching in the ashes as safety criterion, and
Watch and release whether eye blocks up, it is to avoid electrolytic aluminium liquid overflows.Then add aluminum boron intermediate alloy in electrolytic aluminium liquid, in the middle of aluminum zirconium
Alloy and rare earth intermediate alloy, keep 750～760 DEG C of furnace temperature 10～30min, such as 10min, 20min or 30min after interpolation
Deng uniform stirring to aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth alloy fully dissolves, and described alr mode can arrange simultaneously
Lift as mechanical agitation and electromagnetic agitation, the present invention is preferably electromagnetic agitation；The mass fraction making boron in the aluminum solution obtaining is
0.006～0.01%, such as 0.006%, 0.007%, 0.008%, 0.009% or 0.01% etc.；The mass fraction of zirconium is
0.03～0.18%, such as 0.03%, 0.06%, 0.08%, 0.1%, 0.13%, 0.15% or 0.18% etc.；The matter of rare earth
Amount fraction is 0.10～0.25%, such as 0.10%, 0.13%, 0.15%, 0.18%, 0.20%, 0.23% or 0.25% etc..
It is understood that above-mentioned boronating agent and fining agent：Close in the middle of aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth
Golden addition is too high or too low all can reduce the boronation to electrolytic aluminium liquid and thinning effect so as to get aluminum solution crystal grain all become
Thick and uneven, thus reducing the mechanical performance of the heat-resisting round aluminum rod of final finished.
Further, the micronutrient levelss of described electrolytic aluminium liquid are below 0.02wt%.
Further, described trace element be titanium, vanadium, manganese, any one or more in chromium.
It is to be appreciated that based on the heat-resisting round aluminum rod obtaining high conductance, the trace element of electrolytic aluminium liquid contains
Measure and be preferred for below 0.02wt%, for example can for 0.02wt%, 0.018wt%, 0.015wt%, 0.012wt%,
0.010wt%, 0.008wt% or 0.005wt% etc..Here, term " trace element " refer to contained by aluminum metal with respect to
The relatively small number of element of content outside host element (such as copper, silicon, magnesium, zinc, manganese).
Above-mentioned trace element can include one or more of titanium, vanadium, manganese, chromium, preferably titanium, vanadium, manganese and chromium.
Further, described refine is specially：The temperature control making described aluminum solution at 730～750 DEG C, using indifferent gas
Body refining agent is blown in aluminum solution and carries out refining treatment；Then skim.
Further, described refining agent includes KCl, NaCl, cryolite, the ground flux of CaCl composition；During described refine
Between be 15～20min.
Further, the pressure being passed through noble gases is 0.1～0.5Mpa.
Further, described skim after spread one layer of coverture on aluminum solution surface.
The purpose of above-mentioned refine is to remove the objectionable impurities in aluminum solution, improving the degree of purity of aluminium liquid.
Specifically, in described refining process, the temperature control making described aluminum solution at 730～750 DEG C, such as 730 DEG C,
732 DEG C, 735 DEG C, 740 DEG C, 745 DEG C, 748 DEG C, 750 DEG C etc..Using noble gases, refining agent is blown in aluminum solution and carries out essence
Refining is processed；Refining time can elect according to practical situation, for example, can be 15～20min, such as 15min, 16min, 17min,
18min, 19min or 20min etc..After refine terminates 3～5min, with slag-off machine, aluminium liquid surface scum is clawed；Described skim by
Interior carry out to outward, take off and slightly stop during slope in stove gate, allow the aluminum solution taken out of to pass back in stove, then scum silica frost is clawed
Outside stove, skimming will thoroughly, totally.Skim after end, uniformly spread one layer of coverture into stove.
It is understood that above-mentioned is for preventing oxygen from entering electrolytic aluminium liquid oxygen to it in refine using noble gases
Change.Here, noble gases can be argon, helium.Except of course that outside liquid inert gas, also can be using the indifferent gas after decompression
Body, the pressure being passed through noble gases can be 0.1～0.5MPa, such as 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa or 0.5MPa
Deng.Additionally, except noble gases, yet the reducibility gas such as nitrogen can be adopted, nitrogen can be liquid, alternatively gas here
State.
It is to be appreciated that described refining agent is the ground flux being made up of KCl, NaCl, cryolite, CaCl；Described essence
Refining agent consumption can be 0.1～0.15%, such as 0.1%, 0.11%, 0.12%, 0.125%, 0.14%, 0.145%,
0.15% etc..
It is understood that described skim after spread one layer of coverture on aluminum solution surface purpose be to prevent aluminum molten further
Body is oxidized.Described coverture is no sodium form coverture commonly used in the art, no longer describes in detail in this.
Further, the time of described standing is 30～50min.
The purpose of above-mentioned standing is using the proportion official post field trash sedimentation between melt and field trash or to float, thus entering
One step purifies aluminum solution.During described standing, the temperature control of aluminum solution is incubated at 730～750 DEG C, such as 730 DEG C, 732
DEG C, 735 DEG C, 740 DEG C, 745 DEG C, 748 DEG C, 750 DEG C etc..The time of described standing be 30～50min, such as 30min, 35min,
40min, 45min or 50min etc..
Further, it is additionally included in line degasification and filtration after described standing and before described continuous casting and rolling.
It is to be appreciated that because electrolytic aluminium liquid all can make hydrogen content rise in a large number in preparation and transportation, and
Hydrogen content in aluminum solution before described continuous casting and rolling controls in below 0.15ml/100g preferably, and therefore, the present invention passes through online
The mode of dehydrogenation is to control the hydrogen content of aluminum solution without departing from this value.Described online degasification is specially：Aluminum solution flows into degasification dress
Put in case, entered noble gases disperse in aluminum solution by rotary blade, floating with gas, it is molten to take the hydrogen in melt out of aluminum
Body, realizes the purpose of continuously online degasification.
Described filtration can be passed through using glass fiber mesh, corundum microporous earthenware, ceramic filter plate etc. as defecator
By aluminum solution through above-mentioned defecator, to separate the solid inclusions being mixed in aluminum solution, thus reaching purification and impurity removal
Purpose.The present invention filters using two-stage filtering device it is therefore preferable to ceramic filter plate, carries out efficient impurity removal, filtering accuracy is higher,
Be conducive to Alloying Treatment, this device electrified heating, temperature automatic control, prevent aluminum solution temperature fluctuation.
Further, described casting and rolling process condition includes：The temperature of casting is 690～720 DEG C, such as 690 DEG C,
700 DEG C, 710 DEG C or 720 DEG C etc.；Speed is 7.0～7.5t/h, such as 7.0t/h, 7.1t/h, 7.2t/h, 7.3t/h, 7.4t/h
Or 7.5t/h etc.；The temperature of casting machine cooling water be 30～35 DEG C, such as 30 DEG C, 32 DEG C, 34 DEG C or 35 DEG C etc., pressure be 0.3～
0.35MPa, such as 0.3MPa, 0.32MPa, 0.34MPa or 0.35MPa etc.；Enter to roll temperature in the operation of rolling and be 450～500 DEG C,
Such as 450 DEG C, 470 DEG C, 490 DEG C or 500 DEG C etc.；Finishing temperature be 200～250 DEG C, such as 200 DEG C, 210 DEG C, 230 DEG C or
250 DEG C etc.；Going out linear velocity is 6～10m/s, such as 6m/s, 7m/s, 8m/s, 9m/s or 10m/s etc.；The temperature of rolling emulsion
For 40～50 DEG C. such as 40 DEG C, 42 DEG C, 45 DEG C, 48 DEG C or 50 DEG C etc., pressure is 0.2～0.3MPa, such as 0.2MPa,
0.23MPa, 0.25MPa, 0.28MPa or 0.3MPa etc..
It is to be appreciated that in casting cycle, correctly ceramic filter plate will be laid it is ensured that aluminum solution passes through to filter completely
Plate filters；The various use instruments contacting with aluminum solution are it is necessary to keep drying.Using level casting, aluminium liquid is made to stably enter
Crystallization cavity, does not produce turbulent flow and turbulent flow.In casting cycle, pouring temperature is too high, so that crackle waste product is increased；Pouring temperature mistake
Low, ingot casting surface cold shut will be promoted to be formed, make loose, oxide-film, be mingled with product and increase.The present invention control cast temperature be 690～
720 DEG C, for optimal.After strand is pulled out by casting machine, send into milling train before should cut off not less than 30 meters until cast bar do not have pore,
The bad defect such as crackle, ear, burr.Big operating board personnel are in operation it should be appreciated that casting machine speed and rolling mill speed phase interworking
Close, according to producing product type control electric current, make heat-resisting round aluminum rod steady quality.
Embodiment 1
A kind of preparation method of heat-resisting round aluminum rod, comprises the following steps：
(1) first in holding furnace, add electrolytic aluminium liquid, the temperature control making described electrolytic aluminium liquid is at 750 DEG C.
(2) after adding aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy interpolation in above-mentioned electrolytic aluminium liquid
Keep 750 DEG C of furnace temperature 10min, stir stirring to aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth with electromagnetism simultaneously
Alloy fully dissolves so that the mass fraction of boron is 0.006% in aluminum solution, and the mass fraction of zirconium is 0.03%, the matter of rare earth
Amount fraction is 0.25%.
(3) refine：The temperature control making described aluminum solution is at 730 DEG C, smart using more than 99.99% high-purity liquid argon and powder
Refining agent carries out refining treatment to aluminum solution together；Refining time is 15min.After refine terminates 3～5min, with slag-off machine by aluminium liquid
Surface scum claws；Described skimming is carried out from inside to outside, takes off and slightly stops during slope in stove gate, allows the aluminum solution taken out of to return
Flow in stove, then scum silica frost is taken off outside coming out of the stove, skimming will thoroughly, totally.Skim after end, uniformly spread one layer of covering into stove
Agent.
(4) stand：Skim after end, temperature of aluminum liquid controls in 730 DEG C of insulations, and aluminium liquid stands 30min, just can release life
Produce.
(5) online degasification and filtration：Aluminum solution flows in depassing unit case, is delivered into noble gases by rotary blade
Enter in aluminum solution, float with gas and take the hydrogen in melt out of aluminum solution, realize continuously online degasification, make hydrogen content in every 100g
Below aluminum 0.15ml.Efficient impurity removal is carried out using two-stage filtering device, filtering accuracy is higher, is conducive to Alloying Treatment, this dress
Put electrified heating, temperature automatic control, prevent aluminum solution temperature fluctuation.
(6) continuous casting and rolling：Using level casting, make aluminium liquid stably enter crystallization cavity, do not produce turbulent flow and turbulent flow.Pouring
During casting, cast temperature is controlled to be 690 DEG C.After strand is pulled out by casting machine, should cut off not less than 30 meters before sending into milling train
Until cast bar does not have the bad defect such as pore, crackle, ear, burr.Big operating board personnel are in operation it should be appreciated that casting machine speed
Cooperate with rolling mill speed, according to producing product type control electric current, make heat-resisting round aluminum rod steady quality.Production process
In, find that aluminium bar has the wrong circle of outward appearance, the bad defect such as stuck scar or peeling triangle, should stop production adjustment or replacing in time.Mill lubrication
Liquid adopts aluminium bar rolling emulsion, is often detected according to Production requirement and supplements, controls heat-resisting round aluminum rod surface no greasy dirt.
Heat-resisting round aluminum rod continuous casting and rolling process for production parameter is as follows：
Embodiment 2
A kind of preparation method of heat-resisting round aluminum rod, comprises the following steps：
(1) first in holding furnace, add electrolytic aluminium liquid, the temperature control making described electrolytic aluminium liquid is at 750 DEG C.
(2) after adding aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy interpolation in above-mentioned electrolytic aluminium liquid
Keep 750 DEG C of furnace temperature 20min, stir stirring to aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth with electromagnetism simultaneously
Alloy fully dissolves so that the mass fraction of boron is 0.008% in aluminum solution, and the mass fraction of zirconium is 0.10%, the matter of rare earth
Amount fraction is 0.20%.
(3) refine：Powder refining agent, at 730 DEG C, is blown into aluminum solution using argon by the temperature control making described aluminum solution
In carry out refining treatment, be passed through argon pressure be 0.1MPa；Refining time is 17min.After refine terminates 3～5min, with taking off
Aluminium liquid surface scum is clawed by slag device；Described skimming is carried out from inside to outside, takes off and slightly stops during slope in stove gate, allows and take out of
Aluminum solution pass back in stove, then scum silica frost is taken off come out of the stove outer, skim will thoroughly, clean.Skim after end, uniformly spread into stove
One layer of coverture.
(4) stand：Skim after end, temperature of aluminum liquid controls in 740 DEG C of insulations, and aluminium liquid stands 40min, just can release life
Produce.
(5) online degasification and filtration：Aluminum solution flows in depassing unit case, is delivered into noble gases by rotary blade
Enter in aluminum solution, float with gas and take the hydrogen in melt out of aluminum solution, realize continuously online degasification, make hydrogen content in every 100g
Below aluminum 0.15ml.Efficient impurity removal is carried out using two-stage filtering device, filtering accuracy is higher, is conducive to Alloying Treatment, this dress
Put electrified heating, temperature automatic control, prevent aluminum solution temperature fluctuation.
(6) continuous casting and rolling：Using level casting, make aluminium liquid stably enter crystallization cavity, do not produce turbulent flow and turbulent flow.Pouring
During casting, cast temperature is controlled to be 700 DEG C.After strand is pulled out by casting machine, should cut off not less than 30 meters before sending into milling train
Until cast bar does not have the bad defect such as pore, crackle, ear, burr.Big operating board personnel are in operation it should be appreciated that casting machine speed
Cooperate with rolling mill speed, according to producing product type control electric current, make heat-resisting round aluminum rod steady quality.Production process
In, find that aluminium bar has the wrong circle of outward appearance, the bad defect such as stuck scar or peeling triangle, should stop production adjustment or replacing in time.Mill lubrication
Liquid adopts aluminium bar rolling emulsion, is often detected according to Production requirement and supplements, controls heat-resisting round aluminum rod surface no greasy dirt.
Heat-resisting round aluminum rod continuous casting and rolling process for production parameter is as follows：
Embodiment 3
A kind of preparation method of heat-resisting round aluminum rod, comprises the following steps：
(1) first in holding furnace, add electrolytic aluminium liquid, the temperature control making described electrolytic aluminium liquid is at 760 DEG C.
(2) after adding aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy interpolation in above-mentioned electrolytic aluminium liquid
Keep 760 DEG C of furnace temperature 20min, stir stirring to aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth with electromagnetism simultaneously
Alloy fully dissolves so that the mass fraction of boron is 0.009% in aluminum solution, and the mass fraction of zirconium is 0.15%, the matter of rare earth
Amount fraction is 0.15%.
(3) refine：The temperature control making described aluminum solution is at 730 DEG C, smart using more than 99.99% high-purity liquid argon and powder
Refining agent carries out refining treatment to aluminum solution together；Refining time is 15min.After refine terminates 3～5min, with slag-off machine by aluminium liquid
Surface scum claws；Described skimming is carried out from inside to outside, takes off and slightly stops during slope in stove gate, allows the aluminum solution taken out of to return
Flow in stove, then scum silica frost is taken off outside coming out of the stove, skimming will thoroughly, totally.Skim after end, uniformly spread one layer of covering into stove
Agent.
(4) stand：Skim after end, temperature of aluminum liquid controls in 730 DEG C of insulations, and aluminium liquid stands 30min, just can release life
Produce.
(5) online degasification and filtration：Aluminum solution flows in depassing unit case, is delivered into noble gases by rotary blade
Enter in aluminum solution, float with gas and take the hydrogen in melt out of aluminum solution, realize continuously online degasification, make hydrogen content in every 100g
Below aluminum 0.15ml.Efficient impurity removal is carried out using two-stage filtering device, filtering accuracy is higher, is conducive to Alloying Treatment, this dress
Put electrified heating, temperature automatic control, prevent aluminum solution temperature fluctuation.
(6) continuous casting and rolling：Using level casting, make aluminium liquid stably enter crystallization cavity, do not produce turbulent flow and turbulent flow.Pouring
During casting, cast temperature is controlled to be 690 DEG C.After strand is pulled out by casting machine, should cut off not less than 30 meters before sending into milling train
Until cast bar does not have the bad defect such as pore, crackle, ear, burr.Big operating board personnel are in operation it should be appreciated that casting machine speed
Cooperate with rolling mill speed, according to producing product type control electric current, make heat-resisting round aluminum rod steady quality.Production process
In, find that aluminium bar has the wrong circle of outward appearance, the bad defect such as stuck scar or peeling triangle, should stop production adjustment or replacing in time.Mill lubrication
Liquid adopts aluminium bar rolling emulsion, is often detected according to Production requirement and supplements, controls heat-resisting round aluminum rod surface no greasy dirt.
Heat-resisting round aluminum rod continuous casting and rolling process for production parameter is as follows：
Embodiment 4
A kind of preparation method of heat-resisting round aluminum rod, comprises the following steps：
(1) first in holding furnace, add electrolytic aluminium liquid, the temperature control making described electrolytic aluminium liquid is at 760 DEG C.
(2) after adding aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy interpolation in above-mentioned electrolytic aluminium liquid
Keep 760 DEG C of furnace temperature 30min, stir stirring to aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth with electromagnetism simultaneously
Alloy fully dissolves so that the mass fraction of boron is 0.01% in aluminum solution, and the mass fraction of zirconium is 0.18%, the quality of rare earth
Fraction is 0.10%.
(3) refine：The temperature control making described aluminum solution is at 730 DEG C, smart using more than 99.99% high-purity liquid argon and powder
Refining agent carries out refining treatment to aluminum solution together；Refining time is 15min.After refine terminates 3～5min, with slag-off machine by aluminium liquid
Surface scum claws；Described skimming is carried out from inside to outside, takes off and slightly stops during slope in stove gate, allows the aluminum solution taken out of to return
Flow in stove, then scum silica frost is taken off outside coming out of the stove, skimming will thoroughly, totally.Skim after end, uniformly spread one layer of covering into stove
Agent.
(4) stand：Skim after end, temperature of aluminum liquid controls in 730 DEG C of insulations, and aluminium liquid stands 30min, just can release life
Produce.
(5) online degasification and filtration：Aluminum solution flows in depassing unit case, is delivered into noble gases by rotary blade
Enter in aluminum solution, float with gas and take the hydrogen in melt out of aluminum solution, realize continuously online degasification, make hydrogen content in every 100g
Below aluminum 0.15ml.Efficient impurity removal is carried out using two-stage filtering device, filtering accuracy is higher, is conducive to Alloying Treatment, this dress
Put electrified heating, temperature automatic control, prevent aluminum solution temperature fluctuation.
(6) continuous casting and rolling：Using level casting, make aluminium liquid stably enter crystallization cavity, do not produce turbulent flow and turbulent flow.Pouring
During casting, cast temperature is controlled to be 690 DEG C.After strand is pulled out by casting machine, should cut off not less than 30 meters before sending into milling train
Until cast bar does not have the bad defect such as pore, crackle, ear, burr.Big operating board personnel are in operation it should be appreciated that casting machine speed
Cooperate with rolling mill speed, according to producing product type control electric current, make heat-resisting round aluminum rod steady quality.Production process
In, find that aluminium bar has the wrong circle of outward appearance, the bad defect such as stuck scar or peeling triangle, should stop production adjustment or replacing in time.Mill lubrication
Liquid adopts aluminium bar rolling emulsion, is often detected according to Production requirement and supplements, controls heat-resisting round aluminum rod surface no greasy dirt.
Heat-resisting round aluminum rod continuous casting and rolling process for production parameter is as follows：
Applicant states, the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The interpolation of the equivalence replacement to each raw material of product of the present invention and auxiliary element, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of preparation method of heat-resisting round aluminum rod it is characterised in that：Comprise the following steps：
Add aluminum boron intermediate alloy, aluminium zirconium hardener and rare earth intermediate alloy and stir and obtain aluminum solution in electrolytic aluminium liquid,
The mass fraction making boron in aluminum solution is 0.006～0.01%, and the mass fraction of zirconium is 0.03～0.18%, the quality of rare earth
Fraction is 0.10～0.25%；
Above-mentioned aluminum solution is obtained after refine, standing, continuous casting and rolling again heat-resisting round aluminum rod.
2. heat-resisting round aluminum rod according to claim 1 preparation method it is characterised in that：Described electrolytic aluminium liquid micro-
Secondary element content is below 0.02wt%.
3. heat-resisting round aluminum rod according to claim 2 preparation method it is characterised in that：Described trace element is
Any one or more in titanium, vanadium, manganese, chromium.
4. heat-resisting round aluminum rod according to claim 1 preparation method it is characterised in that：Described refine is specially：
By the temperature control of described aluminum solution at 730～750 DEG C, using noble gases, refining agent is blown in aluminum solution and carries out at refine
Reason；Then skim.
5. heat-resisting round aluminum rod according to claim 4 preparation method it is characterised in that：Described refining agent includes
KCl, NaCl, cryolite, the ground flux of CaCl composition；Described refining time is 15～20min.
6. heat-resisting round aluminum rod according to claim 4 preparation method it is characterised in that：The gas of described noble gases
Press as 0.1～0.5Mpa.
7. heat-resisting round aluminum rod according to claim 4 preparation method it is characterised in that：Described skim after molten in aluminum
One layer of coverture is spread in body surface face.
8. heat-resisting round aluminum rod according to claim 1 preparation method it is characterised in that：The time of described standing is
30～50min.
9. heat-resisting round aluminum rod according to claim 1 preparation method it is characterised in that：Described standing after and
It is additionally included in line degasification and the process filtering before described continuous casting and rolling.
10. heat-resisting round aluminum rod according to claim 1 preparation method it is characterised in that：Described continuous casting and rolling technology
Skill condition includes：The temperature of casting is 690～720 DEG C, and speed is 7.0～7.5t/h；The temperature of casting machine cooling water is 30～35
DEG C, pressure is 0.3～0.35MPa；Enter to roll temperature in the operation of rolling and be 450～500 DEG C, finishing temperature is 200～250 DEG C, goes out
Linear velocity is 6～10m/s；The temperature of rolling emulsion is 40～50 DEG C.
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| CN108374110A (en) * | 2018-03-26 | 2018-08-07 | 山东元旺电工科技有限公司 | A kind of round aluminum rod and its production technology |
| CN109628774A (en) * | 2018-12-28 | 2019-04-16 | 河南省圣昊新材料股份有限公司 | The production method of middle intensity non-aged aluminum alloy electrician circle aluminium bar |
| CN110714143A (en) * | 2019-11-27 | 2020-01-21 | 安徽鑫铂铝业股份有限公司 | High-conductivity aluminum profile for conductor rail and preparation method thereof |
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| CN108015282A (en) * | 2018-01-10 | 2018-05-11 | 广西电网有限责任公司电力科学研究院 | A kind of method based on 3D printing technique manufacture parts |
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| CN109628774A (en) * | 2018-12-28 | 2019-04-16 | 河南省圣昊新材料股份有限公司 | The production method of middle intensity non-aged aluminum alloy electrician circle aluminium bar |
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| CN110714143A (en) * | 2019-11-27 | 2020-01-21 | 安徽鑫铂铝业股份有限公司 | High-conductivity aluminum profile for conductor rail and preparation method thereof |
| CN113046583A (en) * | 2021-03-05 | 2021-06-29 | 山西一禾铝业科技新材料有限公司 | High-strength electric-conductivity heat-resistant aluminum alloy rod, preparation method and heat-resistant aluminum alloy cable |
| CN113046602A (en) * | 2021-03-05 | 2021-06-29 | 山西一禾铝业科技新材料有限公司 | Special electrician round aluminum rod for direct-current transmission conductor and preparation method |
| WO2023226427A1 (en) * | 2022-05-27 | 2023-11-30 | 江苏中天科技股份有限公司 | Super-heat-resistant aluminum alloy monofilament |
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