CN102682872A - Semihard aluminum wire, overhead wire and preparation method of semihard aluminum wire - Google Patents
Semihard aluminum wire, overhead wire and preparation method of semihard aluminum wire Download PDFInfo
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- CN102682872A CN102682872A CN2011100662291A CN201110066229A CN102682872A CN 102682872 A CN102682872 A CN 102682872A CN 2011100662291 A CN2011100662291 A CN 2011100662291A CN 201110066229 A CN201110066229 A CN 201110066229A CN 102682872 A CN102682872 A CN 102682872A
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Abstract
The invention belongs to the field of electrotechnics, relates to an aluminum rod with a specific state, a semihard aluminum single wire, an overhead electric transmitting wire with the semihard aluminum single wire serving as a conductor layer and a preparation method of the semihard aluminum single wire. The aluminum rod with the specific state is prepared by controlling a casting process of the aluminum rod, and an aluminum single wire conductor which has the semihard characteristic and is stable in performance is directly prepared by controlling a drawing process. The preparation method of the semihard aluminum single wire has the advantages of being short in flow and simple to operate and the like. The prepared semihard aluminum single wire conductor consumes little electric energy and is stable in performance. The overhead electric transmitting wire made by enabling the semihard aluminum single wire to serve as a conductor material has the advantages of being energy-saving and good in construction characteristic and the like.
Description
Technical field
The invention belongs to electrical technology field, relate to a kind of have the aluminium bar of particular state, a kind of semihard aluminium single line and thus semihard aluminium single line be overhead power transmission conducting wire of conductor layer and preparation method thereof.
Background technology
Overhead power transmission conducting wire is made up of electric conducting material and backing material, and electric conducting material comprises aluminium and aluminium alloy, and backing material comprises galvanized steel wire, aluminium-clad steel wire, carbon fiber or other composite material plugs etc.At present, use the most extensive overhead power transmission conducting wire to be steel reinforced aluminium conductor, its conductor material is a hard-drawn aluminium wire, and main performance index is that intensity is not less than 160MPa, and 20 ℃ dc resistivity is not more than 0.028264 Ω mm
2/ m.In order to reduce the electric energy loss in the transmission of electricity process; The domestic overhead power transmission conducting wire that constitutes as electric conducting material by annealed aluminum wire that developed again subsequently; The main performance index of this annealed aluminum wire is that intensity is 60～90MPa, and 20 ℃ dc resistivity is not more than 0.02737 Ω mm
2/ m, percentage elongation is not less than 20%.This overhead power transmission conducting wire structure that is made up of as electric conducting material annealed aluminum wire comprises compound core conducting wire, steel core soft aluminum conductor and clearance type lead etc.The overhead power transmission conducting wire that contrast is made up of as electric conducting material hard-drawn aluminium wire, this soft aluminum conductor has remarkable energy saving effect because resistivity is lower.But, in work progress, because annealed aluminum wire intensity is lower, conductive line surfaces easy damaged or damage, construction brings big difficulty to lead.Mention among the patent CN201498231U and extrude one deck semi-conductive layer at the soft aluminum conductor skin and reduce the frictionally damage of lead in work progress.This method does not also adopt in actual production at present.
In light of this situation, adopt the aluminum steel with semihard characteristic of a kind of intensity between hard-drawn aluminium wire and annealed aluminum wire can take into account transmission performance and workability simultaneously as the overhead power transmission conducting wire that conductor material constitutes.Current China mainly contains preparation technology's method of two kinds of semi-hard-drawn aluminum wires, and a kind of method is for adopting common electrical aluminum rod through " drawing-annealing-draw again " technology; Another kind method is for adopting common electrical aluminum rod through " drawing-annealing " technology.Before a kind of method mainly be to make material softening through annealing; Draw through suitable deflection again and obtain semi-hard-drawn aluminum wire; A kind of method in back is through adopting suitable annealing process; Controlling crystallization again and grain growth degree and stress elimination degree etc. makes aluminum steel keep certain intensity and conductance preferably, acquisition semi-hard-drawn aluminum wire.Because these two kinds of technologies relate to factors such as annealing process and deflection control simultaneously, production technology is comparatively complicated, and technique controlling difficulty is also bigger, causes final semi-hard-drawn aluminum wire performance stable inadequately, and it is bigger to fluctuate.
Summary of the invention
The object of the invention is a kind of aluminium bar, semihard aluminium single line and overhead power transmission conducting wire with particular state and preparation method thereof is provided, to overcome the deficiency of prior art.
The present invention is through the aluminium bar of preparation particular state; Then through the control drawing process; Directly preparation has the aluminium single line conductor of semihard characteristic and stable performance; The overhead power transmission conducting wire that constitutes as conductor material by this semihard aluminium single line compare current application the most widely the overhead power transmission conducting wire that constitutes as conductor material of hard-drawn aluminium wire have the little advantage of electric energy loss; To have a construction simple and convenient and compare the overhead power transmission conducting wire that is made up of as conductor material annealed aluminum wire, and conductive line surfaces advantage such as easy damaged or damage not.
At first, the invention provides a kind of aluminium bar and preparation method thereof.
A kind of aluminium bar, its diameter are 8～12mm; Its main performance index: tensile strength is 70～110MPa; Percentage elongation is not less than 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
The preparation method of aluminium bar of the present invention comprises the steps:
1) aluminium ingot melting: obtain aluminium liquid after the weight percentage of aluminium being not less than 99.70% aluminium ingot fusing, the aluminium liquid that obtains is carried out the content of refining with impurity in adjustment or the control aluminium liquid in holding furnace; Wherein, refining temperature is controlled to be 710～730 ℃.
Preferable, during refining, adopt solid refined flux aluminium coating liquid surface to carry out refining treatment earlier, adopt the chlorine nitrogen mixture gas to be blown into again and carry out refining treatment in the aluminium liquid;
Further, said solid refined flux is selected from NaCl, KCl, CaF
2And AlF
6In one or more, and the addition of solid refined flux is 5～8kg/t aluminium liquid; The volumn concentration of chlorine in the said chlorine nitrogen mixture gas, as be 20%.
2) leave standstill: the aluminium liquid of refining is left standstill.
Preferable, the said time of leaving standstill is 40～60 minutes;
3) the aluminium liquid that holding furnace is flowed out adopts glass fiber mesh bag or foam ceramic tile to filter through chute the time; Wherein, major impurity element and weight percentage thereof are controlled to be in the aluminium liquid of filtration back: Si≤0.11%, and Fe≤0.25%, Cu≤0.01%, V+Ti+Mn+Cr≤0.02%, and the weight percentage of aluminium is controlled to be in the aluminium liquid: Al>=99.7%.
4) entering of the aluminium liquid after filtration casting machine crystallizing wheel carries out direct casting acquisition ingot casting; Wherein, the cast temperature of aluminium liquid is 680～710 ℃, and the crystallizing wheel rotating speed is 2.5～3r/min; Cooling water pressure is not less than 0.3MPa, and surface temperature control is in 450～500 ℃ of scopes.
5) ingot casting of step 4) acquisition directly gets into the tandem rolling unit and is rolled the said aluminium bar of acquisition, and wherein said rolling finishing temperature is controlled in 260～280 ℃ of scopes.
Preferable, it is rolling that the said operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate;
The present invention learns fast analyzing constituent through the liquefaction of stokehold aluminium, through the content of refining treatment with adjustment or control impurity element; The component and the content thereof of aluminium liquid are consistent with the component and the content thereof of the final aluminium bar with particular state that obtains after said the filtration.
The present invention processes the aluminium bar with particular state through above-mentioned control casting and rolling mill practice, and said aluminium shank diameter is 8～12mm; Its main performance index: tensile strength is 70～110MPa; Percentage elongation is not less than 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Secondly, the invention provides a kind of semihard aluminium single line and preparation method thereof.
A kind of semihard aluminium single line, its cross section are circle, ladder type or Z type; Its main performance index: tensile strength is 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
The preparation of semihard aluminium single line of the present invention comprises the steps:
After the aluminium bar of above-mentioned acquisition carried out drawing, need not annealing operation or other subsequent handlings, directly obtain said semihard aluminium single line; Wherein, the drawing of said aluminium bar adopts big drawing machine to draw the circle line, or adopts the molded lines wire drawing machine to draw molded lines, and its drawing speed is controlled in 4～10m/s scope, and every time changes of section rate is controlled in 16～24% scopes.
The preparation of semihard aluminium single line of the present invention is through the control drawing process need not to anneal or other subsequent technique processes can directly obtain to have the semihard characteristic aluminium single line conductor.
Once more, the invention provides a kind of overhead power transmission conducting wire of processing as conductor material by said semihard aluminium single line.
A kind of overhead power transmission conducting wire of being processed as conductor material layer by said semihard aluminium single line, said overhead power transmission conducting wire comprise layer of support material and one or more layers stranded semihard aluminium single line conductor layer outside layer of support material.
Said semihard aluminium single line conductor layer is that in the semihard aluminium single line of circular, ladder type or Z type one or more constitute by the cross section.
Said layer of support material is galvanized steel wire, zinc-plated invar line, aluminium-clad steel wire, aluminium bag invar line, carbon fiber composite twisted wire or carbon fiber plug.
Said overhead power transmission conducting wire twists lead, clearance type lead or expanded conductor with one heart for the circle line twists lead, molded lines with one heart.
Adopt semihard aluminium single line of the present invention and backing material combined, can obtain the overhead power transmission conducting wire of any required cross section, desired structure through stranding machine.
Involved in the present invention to equipment such as casting machine, tandem rolling unit, big drawing machine, molded lines wire drawing machine be conventional equipment of the prior art.
The preparation technology of the aluminium bar of semihard state of the present invention and semihard aluminium single line conductor, its key technology are to control the casting of aluminium bar and the drawing process of rolling mill practice and aluminium bar, and preparation method of the present invention has characteristics such as flow process is short, simple to operate.Little and the stable performance of prepared semihard aluminium single line conductor electric energy loss; The overhead power transmission conducting wire of being processed as conductor material by this semihard aluminium single line has energy-conservation and characteristics such as construction property is good.
Description of drawings
Preparation technology's schematic flow sheet of Fig. 1 aluminium bar, semihard aluminium single line and overhead power transmission conducting wire
The cross sectional shape sketch map of Fig. 2 semihard aluminium single line
Fig. 3 overhead power transmission conducting wire structural representation
Embodiment
Further set forth the present invention below in conjunction with specific embodiment, should be understood that these embodiment only are used to the present invention is described and are not used in restriction protection scope of the present invention.
Preparation technology's schematic flow sheet of aluminium bar as shown in Figure 1, semihard aluminium single line and overhead power transmission conducting wire, its main processes comprise aluminium ingot melting, casting, rolling, drawing, operation such as stranded, and concrete steps are following:
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Aluminium liquid carries out refining in holding furnace then; Refining temperature is in 710～730 ℃ of scopes; Adopt solid refined flux NaCl (the NaCl addition is a 8kg/t aluminium liquid) aluminium coating liquid surface to carry out refining treatment earlier; Adopt the chlorine nitrogen mixture gas to be blown in the aluminium liquid (volumn concentration of chlorine is 20% in the said chlorine nitrogen mixture gas) again and carry out refining treatment, aluminium liquid left standstill 50 minutes then.The aluminium liquid that flows out from holding furnace adopts the glass fiber mesh bag to filter that (filtering in the aluminium liquid of back major impurity element and weight percentage thereof is controlled to be: Si≤0.10%, Fe≤0.20% through chute the time; Cu≤0.01%; V+Ti+Mn+Cr≤0.02%), get into the casting machine crystallizing wheel then and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃; Crystallizing wheel rotating speed 2.5～3r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is in 450～500 ℃ of scopes.Ingot casting directly gets into three-roller type tandem rolling unit and is rolled and obtains the aluminium bar; Wherein, it is rolling that the operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate; The finishing temperature of aluminium bar is controlled in 260～280 ℃ of scopes, and the diameter of rolling back aluminium bar is about 9.5mm.
The aluminium bar that present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw the circle line on above-mentioned aluminium bar, drawing speed is controlled in 4～10m/s scope, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process, adopt good lubricating fluid that mould and drum are lubricated and cool off, can directly obtain the cross section after the drawing for aluminium single line circular and that have the semihard characteristic, shown in Fig. 2 (a).
The main performance index of the semihard aluminium single line conductor of present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
Adopt backing material by this aluminum steel conductor material with can constitute that round line twists with one heart, molded lines twists with one heart, the overhead power transmission conducting wire of multiple versions such as clearance type lead or expanded conductor.
Overhead power transmission conducting wire shown in Fig. 3 (a); Comprise stranded zinc-plated invar line layer of support material 2 and two-layer stranded semihard aluminium single line conductor layer 1 outside layer of support material, said semihard aluminium single line conductor layer is that circle and the aluminium single line with semihard characteristic constitute by the cross section of present embodiment gained.Said overhead power transmission conducting wire is the circle line structure that tangles with one heart.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
Embodiment 2
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Aluminium liquid carries out refining in holding furnace then, and refining temperature adopts solid refined flux CaF earlier in 710～730 ℃ of scopes
2(CaF
2Addition is a 6kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, adopts the chlorine nitrogen mixture gas to be blown in the aluminium liquid (volumn concentration of chlorine is 20% in the said chlorine nitrogen mixture gas) again and carries out refining treatment, and aluminium liquid left standstill 50 minutes then.The aluminium liquid that flows out from holding furnace adopts foam ceramic tile to filter that (filtering in the aluminium liquid of back major impurity element and weight percentage thereof is controlled to be: Si≤0.11%, Fe≤0.25% through chute the time; Cu≤0.01%; V+Ti+Mn+Cr≤0.02%), get into the casting machine crystallizing wheel then and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃; The crystallizing wheel rotating speed is controlled to be 2.5～3r/min, and cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is in 450～500 ℃ of scopes.Ingot casting directly gets into three-roller type tandem rolling unit and is rolled and obtains the aluminium bar; Wherein, it is rolling that the operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate; The finishing temperature of aluminium bar is controlled in 260～280 ℃ of scopes, and the diameter of rolling back aluminium bar is about 9.5mm.
The aluminium bar that present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Adopt non-sliding type molded lines wire drawing machine to draw molded lines on above-mentioned aluminium bar, drawing speed is controlled in 4～10m/s scope, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process; Adopt good lubricating fluid that mould and drum are lubricated and cool off; Can directly obtain the cross section after the drawing is ladder type and the aluminium single line with semihard characteristic, T type shown in Fig. 2 (b) and the aluminium single line that has the aluminium single line of semihard characteristic and have the semihard characteristic.
The main performance index of the semihard aluminium single line conductor of present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
Overhead power transmission conducting wire shown in Fig. 3 (b); Comprise carbon fiber plug layer of support material 2 and two-layer stranded semihard aluminium single line conductor layer 3 outside layer of support material, said semihard aluminium single line conductor layer is that ladder type and the aluminium single line with semihard characteristic constitute by the cross section of present embodiment gained.Said overhead power transmission conducting wire is the molded lines structure that tangles with one heart.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
Embodiment 3
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Aluminium liquid carries out refining in holding furnace then; Refining temperature is in 710～730 ℃ of scopes; (addition of NaCl is a 3kg/t aluminium liquid to adopt solid refined flux NaCl and KCl earlier; The addition of KCl is a 4kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, adopts the chlorine nitrogen mixture gas to be blown in the aluminium liquid (volumn concentration of chlorine is 20% in the said chlorine nitrogen mixture gas) again and carries out refining treatment, and aluminium liquid left standstill 40 minutes then.The aluminium liquid that flows out from holding furnace adopts foam ceramic tile to filter that (filtering in the aluminium liquid of back major impurity element and weight percentage thereof is controlled to be: Si≤0.11%, Fe≤0.25% through chute the time; Cu≤0.01%; V+Ti+Mn+Cr≤0.02%), get into the casting machine crystallizing wheel then and carry out direct casting, the cast temperature of aluminium liquid is controlled at 680～710 ℃; The crystallizing wheel rotating speed is controlled to be 2.5～3r/min, and cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 1290mm
2, surface temperature control is in 450～500 ℃ of scopes.Ingot casting directly gets into three-roller type tandem rolling unit and is rolled and obtains the aluminium bar; Wherein, it is rolling that the operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate; The finishing temperature of aluminium bar is controlled in 260～280 ℃ of scopes, and the diameter of rolling back aluminium bar is about 9.5mm.
The aluminium bar that present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Adopt non-sliding type molded lines wire drawing machine to draw molded lines on above-mentioned aluminium bar, drawing speed is controlled in 4～10m/s scope, and every time changes of section rate should be controlled in 16～24% scopes.In pulling process, to adopt good lubricating fluid that mould and drum are lubricated and cool off, can directly obtain the cross section after the drawing is Z type and the aluminium single line with semihard characteristic, Z type shown in Fig. 2 (c) and the aluminium single line with semihard characteristic.
The main performance index of the semihard aluminium single line conductor of present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
The overhead power transmission conducting wire of present embodiment; Comprise stranded aluminium-clad steel wire layer of support material 6 and two-layer stranded semihard aluminium single line conductor layer 5 outside layer of support material, said semihard aluminium single line conductor layer is that Z type and the aluminium single line with semihard characteristic constitute by the cross section of present embodiment gained.Said overhead power transmission conducting wire is the molded lines structure that tangles with one heart.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
Embodiment 4
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Aluminium liquid carries out refining in holding furnace then; Refining temperature is in 715～725 ℃ of scopes; Adopt solid refined flux KCl (addition of KCl is a 5kg/t aluminium liquid) aluminium coating liquid surface to carry out refining treatment earlier; Adopt the chlorine nitrogen mixture gas to be blown in the aluminium liquid (volumn concentration of chlorine is 20% in the said chlorine nitrogen mixture gas) again and carry out refining treatment, aluminium liquid left standstill 60 minutes then.The aluminium liquid that flows out from holding furnace adopts the glass fiber mesh bag to filter that (filtering in the aluminium liquid of back major impurity element and weight percentage thereof is controlled to be: Si≤0.11%, Fe≤0.25% through chute the time; Cu≤0.01%; V+Ti+Mn+Cr≤0.02%), get into the casting machine crystallizing wheel then and carry out direct casting, the cast temperature of aluminium liquid is controlled at 690～700 ℃; Crystallizing wheel rotating speed 2.5r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 915mm
2, surface temperature control is in 470～490 ℃ of scopes.Ingot casting directly gets into three-roller type tandem rolling unit and is rolled and obtains the aluminium bar; Wherein, it is rolling that the operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate; The finishing temperature of aluminium bar is controlled in 270～280 ℃ of scopes, and the diameter of rolling back aluminium bar is about 8mm.
The aluminium bar that present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw the circle line on above-mentioned aluminium bar, drawing speed is controlled in 4～7m/s scope, and every time changes of section rate should be controlled in 16～20% scopes.In pulling process, adopt good lubricating fluid that mould and drum are lubricated and cool off, can directly obtain the cross section after the drawing for aluminium single line circular and that have the semihard characteristic, shown in Fig. 2 (a).
The main performance index of the semihard aluminium single line conductor of present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
Embodiment 4 overhead power transmission conducting wire; Comprise carbon fiber composite twisted wire layer of support material and three layers of stranded semihard aluminium single line conductor layer outside layer of support material, said semihard aluminium single line conductor layer is that circle and the aluminium single line with semihard characteristic constitute by the cross section of present embodiment gained.Said overhead power transmission conducting wire is the circle line structure that tangles with one heart.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
Aluminium content is not less than 99.70% aluminium ingot, in shaft furnace, melts; Aluminium liquid carries out refining in holding furnace then, and refining temperature adopts solid refined flux AlF earlier in 715～725 ℃ of scopes
6(AlF
6Addition is a 6kg/t aluminium liquid) aluminium coating liquid surface carries out refining treatment, adopts the chlorine nitrogen mixture gas to be blown in the aluminium liquid (volumn concentration of chlorine is 20% in the said chlorine nitrogen mixture gas) again and carries out refining treatment, and aluminium liquid left standstill 50 minutes then.The aluminium liquid that flows out from holding furnace adopts the glass fiber mesh bag to filter that (filtering in the aluminium liquid of back major impurity element and weight percentage thereof is controlled to be: Si≤0.11%, Fe≤0.25% through chute the time; Cu≤0.01%; V+Ti+Mn+Cr≤0.02%), get into the casting machine crystallizing wheel then and carry out direct casting, the cast temperature of aluminium liquid is controlled at 690～700 ℃; Crystallizing wheel rotating speed 3r/min, cooling water pressure is not less than 0.3MPa.Casting ingot casting sectional area is 2058mm
2, surface temperature control is in 450～480 ℃ of scopes.Ingot casting directly gets into three-roller type tandem rolling unit and is rolled and obtains the aluminium bar; Wherein, it is rolling that the operation of rolling adopts band to part power a little, and adopt the emulsion breaker roll to cool off and lubricate; The finishing temperature of aluminium bar is controlled in 260～270 ℃ of scopes, and the diameter of rolling back aluminium bar is about 12mm.
The aluminium bar that present embodiment obtains does not need annealed PROCESS FOR TREATMENT, and its main performance index is: tensile strength is 70～110MPa; Percentage elongation is not little by 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
Adopt 13 mould slidingtype big drawing machines to draw the circle line on above-mentioned aluminium bar, drawing speed is controlled in 7～10m/s scope, and every time changes of section rate should be controlled in 20～24% scopes.In pulling process, adopt good lubricating fluid that mould and drum are lubricated and cool off, can directly obtain the cross section after the drawing for aluminium single line circular and that have the semihard characteristic, shown in Fig. 2 (a).
The main performance index of the semihard aluminium single line conductor of present embodiment gained is: tensile strength 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
Overhead power transmission conducting wire shown in Fig. 3 (c); Comprise stranded aluminium bag invar line layer of support material 6 and stranded semihard aluminium single line conductor layer 5 and stranded semihard aluminium single line conductor layer 7 outside semihard aluminium single line conductor layer 5 outside layer of support material; Said semihard aluminium single line conductor layer 5 is that Z type and the aluminium single line with semihard characteristic constitute by the cross section of embodiment 3 gained, and said semihard aluminium single line conductor layer 7 is that circle and the aluminium single line with semihard characteristic constitute by the cross section of embodiment 1 gained.Said overhead power transmission conducting wire is the hybrid architecture of concentric strand of circle line and the concentric strand of molded lines.
The overhead power transmission conducting wire that present embodiment adopts the semihard aluminium single line of the stable performance of gained to constitute as conductor material has stable performance, energy-conservation and characteristics that construction property is good.
The foregoing description does not limit protection scope of the present invention; Especially the overhead power transmission conducting wire that is made up of semihard aluminium single line and backing material is not limited to the listed structure of embodiment; Adopting the semihard aluminium single line of the foregoing description is conductor material; And combination backing material; The process stranding machine can obtain the overhead power transmission conducting wire in any required cross section, comprises that round line twists lead, molded lines with one heart and twists structures such as lead, clearance type lead or expanded conductor with one heart, and those skilled in the art's any simple transformation and equivalent substitution are all within protection scope of the present invention.
Claims (10)
1. the preparation method of an aluminium bar comprises the steps:
1) aluminium ingot melting: obtain aluminium liquid after the weight percentage of aluminium being not less than 99.70% aluminium ingot fusing, the aluminium liquid that obtains is carried out the content of refining with impurity in adjustment or the control aluminium liquid in holding furnace; Wherein, refining temperature is controlled to be 710～730 ℃;
2) leave standstill: the aluminium liquid of refining is left standstill;
3) the aluminium liquid that holding furnace is flowed out adopts glass fiber mesh bag or foam ceramic tile to filter through chute the time;
4) entering of the aluminium liquid after filtration casting machine crystallizing wheel carries out direct casting acquisition ingot casting; Wherein, the cast temperature of aluminium liquid is controlled to be 680～710 ℃, and the crystallizing wheel rotating speed is 2.5～3r/min; Cooling water pressure is not less than 0.3MPa, and surface temperature control is in 450～500 ℃ of scopes;
5) ingot casting of step 4) acquisition directly gets into three-roller type tandem rolling unit and is rolled the said aluminium bar of acquisition, and wherein, said rolling finishing temperature is controlled in 260～280 ℃ of scopes.
2. preparation method as claimed in claim 1 is characterized in that, in the step 1), during refining, adopts solid refined flux NaCl, KCl, CaF earlier
2And AlF
6In one or more aluminium coating liquid surfaces carry out refining treatment, adopt the chlorine nitrogen mixture gas to be blown into again and carry out refining treatment in the aluminium liquid; Step 2) in, the said time of leaving standstill is 40～60 minutes.
3. preparation method as claimed in claim 1; It is characterized in that in the step 3), major impurity element and weight percentage thereof are controlled to be in the aluminium liquid of filtration back: Si≤0.11%; Fe≤0.25%; Cu≤0.01%, V+Ti+Mn+Cr≤0.02%, and the weight percentage of aluminium is controlled to be in the aluminium liquid: Al>=99.7%.
4. aluminium bar, for the preparation method who adopts the arbitrary described aluminium bar of claim 1-3 makes, its diameter is 8～12mm; Tensile strength is 70～110MPa; Percentage elongation is not less than 15%; 20 ℃ dc resistivity is not more than 0.02765 Ω mm
2/ m.
5. a semihard aluminium single line makes for adopting the described aluminium bar of claim 4 directly to carry out drawing.
6. semihard aluminium single line as claimed in claim 5 is characterized in that, the cross section of said semihard aluminium single line is circle, ladder type or Z type; The tensile strength of said semihard aluminium single line is 100～140MPa; Percentage elongation is not less than 3%; 20 ℃ dc resistivity is not more than 0.02781 Ω mm
2/ m.
7. like the preparation method of claim 5 or 6 described semihard aluminium single lines, comprise the steps:
After the described aluminium bar of claim 4 carried out drawing, need not annealing operation or other subsequent handlings, directly obtain said semihard aluminium single line; Wherein, the drawing of said aluminium bar adopts big drawing machine to draw the circle line, or adopts the molded lines wire drawing machine to draw molded lines, and the drawing speed of said drawing is controlled in 4～10m/s scope, and every time changes of section rate is controlled in 16～24% scopes.
8. an overhead power transmission conducting wire is made as conductor layer by claim 5 or 6 described semihard aluminium single lines.
9. overhead power transmission conducting wire as claimed in claim 8 is characterized in that, comprises layer of support material and one or more layers stranded semihard aluminium single line conductor layer outside layer of support material; Said layer of support material is galvanized steel wire, zinc-plated invar line, aluminium-clad steel wire, aluminium bag invar line, carbon fiber composite twisted wire or carbon fiber plug; Said semihard aluminium single line conductor layer is that in the semihard aluminium single line of circular, ladder type or Z type one or more constitute by the cross section.
10. like claim 8 or 9 described overhead power transmission conducting wires, it is characterized in that said overhead power transmission conducting wire twists lead, clearance type lead or expanded conductor with one heart for the circle line twists lead, molded lines with one heart.
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| CN104264011A (en) * | 2014-09-30 | 2015-01-07 | 石家庄新日锌业有限公司 | Aluminum wire |
| CN104319016A (en) * | 2014-11-06 | 2015-01-28 | 无锡锡洲电磁线有限公司 | Electromagnetic wire semi-hard processing technology |
| CN104342587A (en) * | 2013-07-31 | 2015-02-11 | 沈阳阻燃电缆有限责任公司 | High-electric-conduction and energy-saving aluminum guide bar and its production technology |
| CN105761833A (en) * | 2016-04-25 | 2016-07-13 | 国网山东省电力公司莒南县供电公司 | Diameter expansion lead |
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| CN110164620A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
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| CN106363034A (en) * | 2016-08-26 | 2017-02-01 | 远东电缆有限公司 | Intermediate state high-conductive aluminum single wire and manufacturing method thereof |
| CN110164618A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
| CN110164620A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
| CN110164619A (en) * | 2018-02-13 | 2019-08-23 | 中国电力科学研究院有限公司 | A kind of big section strand type conducting wire |
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