CN105244070A - Fiber reinforcement copper substrate composite contact line - Google Patents
Fiber reinforcement copper substrate composite contact line Download PDFInfo
- Publication number
- CN105244070A CN105244070A CN201510696148.8A CN201510696148A CN105244070A CN 105244070 A CN105244070 A CN 105244070A CN 201510696148 A CN201510696148 A CN 201510696148A CN 105244070 A CN105244070 A CN 105244070A
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- China
- Prior art keywords
- contact wire
- copper alloy
- fiber reinforcement
- base composites
- copper
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- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 230000002787 reinforcement Effects 0.000 title claims abstract description 39
- 239000000835 fiber Substances 0.000 title claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract description 18
- 229910052802 copper Inorganic materials 0.000 title abstract description 12
- 239000010949 copper Substances 0.000 title abstract description 12
- 239000000758 substrate Substances 0.000 title abstract 7
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 58
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 38
- 239000004917 carbon fiber Substances 0.000 claims abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 230000002708 enhancing effect Effects 0.000 claims description 35
- 239000011159 matrix material Substances 0.000 claims description 25
- 238000005275 alloying Methods 0.000 claims description 11
- 238000009941 weaving Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 4
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 claims description 4
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical group [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 14
- 238000005728 strengthening Methods 0.000 description 8
- 238000009954 braiding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001192 hot extrusion Methods 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910000597 tin-copper alloy Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910017526 Cu-Cr-Zr Inorganic materials 0.000 description 1
- 229910017810 Cu—Cr—Zr Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910001097 yellow gold Inorganic materials 0.000 description 1
- 239000010930 yellow gold Substances 0.000 description 1
Landscapes
- Woven Fabrics (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention provides a fiber reinforcement copper substrate composite contact line which mainly comprises a reinforcement core and a copper alloy substrate. The copper alloy substrate uniformly coats the surface of the reinforcement core through coextrusion. The substrate is made of high-conductivity copper alloy. The reinforcement core is a copper wire and carbon fiber bundle braided core or a copper and carbon fiber bundle composite core. The substrate uniformly coats the surface of the reinforcement core through an extrusion technology, so as to acquire the fiber reinforcement copper substrate composite contact line whose structure and performance meet iron standard requirements. According to the composite contact line, great conductivity is ensured; the maximum suspension tension of the line is increased; the weight of the contact line is reduced; the maximum running speed of a train is enhanced; and the overall safety factor of the contact line is improved.
Description
Technical field
The present invention relates to contact wire technical field, particularly relate to a kind of fiber reinforcement Cu-base composites contact wire.
Background technology
Contact wire is the key components of electric railway Pantograph-OCS system, requires that having enough tensile strength hangs tension force to bear it, good gets stream to ensure that electric railway locomotive obtains; Require to there is excellent electric conductivity, to ensure the electric energy loss that electrified circuit is lower simultaneously.
Nowadays, domestic electric railway construction enters a high-speed developing period, speed per hour is that the technology of the high speed railway construction of 250 kilometers, 350 kilometers and operation is ripe, meanwhile start the R and D upsurge of speed per hour more than the ultra high speed railway of 400 kilometers both at home and abroad, this has higher requirement to electrification railway contact net, require that contact wire possesses high tensile strength to bear higher suspension tension force, thus the off-line spark produced when improving contact wire transmitting speed and reduce locomotive high-speed cruising.
Copper alloy is the most widely used material of high-speed railway contact wire.But the contradiction for a long time, existed in the research and preparation of copper alloy contact wire between high strength and high conductivity.Adding alloying element is the Traditional solutions improving copper alloy contact wire tensile strength, but interpolation solute atoms can cause distortion of lattice, and then causes the reduction of its electric conductivity.At present, existing high-strength copper alloy contact wire is all to sacrifice premised on conductivity and plasticity.
Summary of the invention
The embodiment provides a kind of fiber reinforcement Cu-base composites contact wire, the fiber reinforcement Cu-base composites contact wire all meeting the requirement of iron mark to provide a kind of stuctures and properties.
To achieve these goals, this invention takes following technical scheme.
A kind of fiber reinforcement Cu-base composites contact wire, comprising: strengthen core and copper alloy matrix, described copper alloy matrix is coated on the surface of described enhancing core equably by Compound Extrusion, and described enhancing core is made up of copper alloy silk and carbon fiber bundle.
Preferably, described enhancing core is consisted of carbon fiber bundle and copper alloy silk weaving.
Preferably, described enhancing core is consisted of carbon fiber bundle and copper alloy compound.
Preferably, the outer surface of described fiber reinforcement Cu-base composites contact wire is also provided with suspension groove, described suspension groove is positioned at top, contact wire cross section and symmetrical two grooves for hanging.
Preferably, the outer surface of described fiber reinforcement Cu-base composites contact wire is also provided with alloy species identification groove, described alloy species identification groove is the shallow trench being positioned at contact wire cross section upper surface.
Preferably, described copper alloy matrix is identical with the classification of the alloying element that described enhancing core comprises, and the mass percent of the alloying element added in described copper alloy matrix and described enhancing core is not higher than setting threshold.
Preferably, the alloying element added in described copper alloy matrix is copper silver or copper tin or copper magnesium alloy.
Preferably, the axis of described enhancing core comprises the characteristic cycle section of multiple repetition, and the radial section of each characteristic cycle section comprises the minor structure arranged by carbon fiber bundle and copper alloy silk.
Preferably, in each described minor structure, one or more carbon fiber bundle and the arrangement of one or more copper alloy silk weaving.
Preferably, comprise multiple described minor structure at the radial section of each characteristic cycle section, multiple described minor structure arranges around the Central Symmetry of described enhancing core, and carbon fiber bundle in each minor structure and copper alloy silk are around the central rotation of described minor structure.
The technical scheme provided as can be seen from the embodiment of the invention described above, the fiber reinforcement Cu-base composites contact wire that the embodiment of the present invention provides with the copper alloy of high conductivity for matrix, with copper wire and the braiding core of carbon fiber bundle or the composite core of copper and carbon fiber bundle for strengthening core, matrix is coated on enhancing wicking surface equably by extrusion process, obtains the fiber reinforcement Cu-base composites contact wire that stuctures and properties meets the requirement of iron mark.Composite material contact wire, while guarantee good electric conductivity, can increase the maximum suspension tension force of circuit, reduces the weight of contact wire, promotes highest running speed of train and improve contact wire general safety coefficient.
The aspect that the present invention adds and advantage will part provide in the following description, and these will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The concrete structure figure of a kind of fiber reinforcement Cu-base composites contact wire that Fig. 1 provides for the embodiment of the present invention, in figure, strengthens core 1, copper alloy matrix 2, hangs groove 3 and alloy species identification groove 4;
A kind of schematic diagram strengthening core and formed by carbon fiber bundle and copper alloy silk weaving that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram that the another kind enhancing core that Fig. 3 provides for the embodiment of the present invention is consisted of carbon fiber bundle and copper alloy silk weaving;
The schematic diagram that the another kind enhancing core that Fig. 4 provides for the embodiment of the present invention is consisted of carbon fiber bundle and copper alloy silk weaving.
Embodiment
Be described below in detail embodiments of the present invention, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in specification of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
China Express Railway main track generally adopts 150mm
2the copper contact wire in cross section, every ten thousand kilometers, every line consumption cathode copper about 1.3 ten thousand tons.According to 120mm
2the contact wire in cross section, cathode copper laying length per ton can reach 125% of former laying length, but needs the high strength and the conductivity problems that solve contact wire.
Embodiments provide a kind of fiber reinforcement Cu-base composites contact wire, its concrete structure as shown in Figure 1.By enhancing core 1, copper alloy matrix 2, hang groove 3 and alloy species identification groove 4 two parts and form, the copper alloy matrix 2 of high conductivity is coated on equably by continuous compound hot extrusion process on the enhancing core 1 that woven by copper wire and carbon fiber bundle.
In actual applications, as shown in Figure 2, core can be strengthened and formed by carbon fiber bundle and copper alloy silk weaving.
In actual applications, strengthen core to be formed by carbon fiber bundle and copper alloy compound.
The outer surface of fiber reinforcement Cu-base composites contact wire is also provided with and hangs groove and alloy species identification groove.Hanging groove is be positioned at top, contact wire cross section and symmetrical two grooves for hanging.Alloy species identification groove is the shallow trench being positioned at contact wire cross section upper surface, wherein signal bronze identification groove have 1 be positioned at directly over; Cu-Cr-Zr alloy identification groove has 1 to be positioned at one-sided, with centerlines 22.5 °; Kufil class identification groove has 2 and symmetrical, and central angle is 45.0 °; Copper magnesium alloy identification groove has 3, and 2 are symmetrical and central angle is 45.0 °, remain 1 be positioned at directly over.
Described copper alloy matrix is identical with the classification of the alloying element that described enhancing core comprises, and the mass percent of the alloying element added in described copper alloy matrix and described enhancing core is not higher than setting threshold, and this setting threshold can be 0.4%.The alloying element added in copper alloy matrix is copper silver or copper tin or copper magnesium alloy, described copper alloy matrix and to strengthen the copper alloy silk that core comprises be low tin-copper alloy.
Copper alloy matrix is coated on enhancing wicking surface equably by extrusion process, obtains cross section structure and meets the fiber reinforcement Cu-base composites contact wire that TB/T2809 " electric railway Copper and its alloy contact wire " specifies.
The forming process of the fiber reinforcement Cu-base composites contact wire of the embodiment of the present invention mainly comprises: first enhancing core is placed in N
2in gas atmosphere, coppering is carried out to enhancing core and adds rounding process.Then, being placed in continued extrusion in extruder using strengthening core respectively with the low tin-copper alloy bar as copper alloy matrix, obtaining composite wood material base bar.Finally composite wood material base bar is placed on drawbench, carries out multimode cold drawn forming, make composite material contact wire.
In figure 3, the enhancing cored structure of fiber reinforcement Cu-base composites contact wire is by obtaining carbon fiber bundle and copper alloy silk weaving, therefore enhancing core has repeatability vertically, claim the shortest repeated segments to be characteristic cycle section, the radial section of characteristic cycle section is called characteristic cross-section.On the characteristic cross-section strengthening core, can be divided into some carbon fiber bundles and the tight staggered minor structure of copper alloy silk, each minor structure comprises around the enhancing revolution direction at core center and the sense of rotation around minor structure center.Namely comprise multiple described minor structure at the radial section of each characteristic cycle section, multiple described minor structure arranges around the Central Symmetry of described enhancing core, and the carbon fiber bundle in each minor structure and copper alloy silk are around the center spinning of described minor structure.
Embodiment 1:
Get 12K fibre bundle and tin copper (Theil indices the is 0.15% mass fraction ratio) B alloy wire of T700SC type carbon fiber; be placed in braiding machine and carry out weaving process; the enhancing core obtained as shown in Figure 2, in Ar gas atmosphere, covers copper and rounding process to enhancing core.
In its characteristic cycle section, can be considered 1 the triangle minor structure 5 be made up of 2 bundle carbon fiber bundles 3 and 1 copper alloy silk 4,6 triangle minor structures 5 are closely looped around around 1 copper alloy silk, and then all triangle minor structure 5 spirals are drawn, and the spin direction of adjacent triangle minor structure 5 is contrary simultaneously.In the characteristic cycle section that the present embodiment strengthens core, can be considered triangle minor structure 5 spiral extraction vertically, period three silver coin structure spins 360 °, and closely revolves round the sun 180 ° around 1 copper alloy silk.In the present embodiment, carbon fiber bundle 3 has identical diameter of section with copper alloy silk 4.In the characteristic cross-section strengthening core, carbon fiber bundle 3 and the area ratio of copper alloy silk 4 are close to 3:2.
Embodiment 2:
Get the fibre bundle of SYT49 type carbon fiber and yellow gold silk (silver content be 0.10% mass fraction than), being placed in braiding machine carries out weaving process, the enhancing core obtained as shown in Figure 3, at N
2in gas atmosphere, enhancing core is covered copper and carries out rounding process.
In the generic cyclic section strengthening core, can be considered 1 paired minor structure, 6,8 paired minor structures 6 of being first made up of 1 bundle carbon fiber bundle 3 and 1 copper alloy silk 4 closely around and rear screw is drawn, Adjacent pairs minor structure 6 is identical from the hand of spiral simultaneously.In the present embodiment, carbon fiber bundle 3 has identical diameter of section with copper alloy silk 4.In the characteristic cross-section strengthening core, carbon fiber bundle 3 and the area ratio of copper alloy silk 4 are close to 1:1.
In sum, the fiber reinforcement Cu-base composites contact wire that the embodiment of the present invention provides with the copper alloy of high conductivity for matrix, with copper wire and the braiding core of carbon fiber bundle or the composite core of copper and carbon fiber bundle for strengthening core, matrix is coated on enhancing wicking surface equably by extrusion process, obtains the fiber reinforcement Cu-base composites contact wire that stuctures and properties meets the requirement of iron mark.Composite material contact wire, while guarantee good electric conductivity, can increase the maximum suspension tension force of circuit, reduces the weight of contact wire, promotes highest running speed of train and improve contact wire general safety coefficient.
The fiber reinforcement Cu-base composites contact wire that the embodiment of the present invention provides mainly utilizes carbon fiber to bear and is applied to tension force on contact wire, utilize the matrix conduction current of high conductivity, its military service coefficient of safety gets a promotion, saves energy simultaneously, this contact wire significantly can not only improve the tensile strength of copper alloy matrix, and can ensure higher conductivity.
The quality of the carbon fiber in the fiber reinforcement Cu-base composites contact wire that the embodiment of the present invention provides is about 1/4th of same volume copper, can reduce the weight of contact wire; There is not potential difference between the alloying element of carbon fiber and copper and interpolation, the corrosion resistance of contact wire entirety can be promoted;
The fiber reinforcement Cu-base composites contact wire that the embodiment of the present invention provides adopts continuous compound hot extrusion process, without ag(e)ing process in treatment process.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device or system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Apparatus and system embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a fiber reinforcement Cu-base composites contact wire, it is characterized in that, comprise: strengthen core and copper alloy matrix, described copper alloy matrix is coated on the surface of described enhancing core equably by Compound Extrusion, and described enhancing core is made up of copper alloy silk and carbon fiber bundle.
2. fiber reinforcement Cu-base composites contact wire according to claim 1, is characterized in that, described enhancing core is consisted of carbon fiber bundle and copper alloy silk weaving.
3. fiber reinforcement Cu-base composites contact wire according to claim 1, is characterized in that, described enhancing core is consisted of carbon fiber bundle and copper alloy compound.
4. fiber reinforcement Cu-base composites contact wire according to claim 1, it is characterized in that, the outer surface of described fiber reinforcement Cu-base composites contact wire is also provided with suspension groove, and described suspension groove is positioned at top, contact wire cross section and symmetrical two grooves for hanging.
5. fiber reinforcement Cu-base composites contact wire according to claim 1, it is characterized in that, the outer surface of described fiber reinforcement Cu-base composites contact wire is also provided with alloy species identification groove, and described alloy species identification groove is the shallow trench being positioned at contact wire cross section upper surface.
6. the fiber reinforcement Cu-base composites contact wire according to any one of claim 1 to 5, it is characterized in that, described copper alloy matrix is identical with the classification of the alloying element that described enhancing core comprises, and the mass percent of the alloying element added in described copper alloy matrix and described enhancing core is not higher than setting threshold.
7. fiber reinforcement Cu-base composites contact wire according to claim 6, is characterized in that, the alloying element added in described copper alloy matrix is copper silver or copper tin or copper magnesium alloy.
8. according to the fiber reinforcement Cu-base composites contact wire described in claim 1 to 7, it is characterized in that, the axis of described enhancing core comprises the characteristic cycle section of multiple repetition, and the radial section of each characteristic cycle section comprises the minor structure arranged by carbon fiber bundle and copper alloy silk.
9. fiber reinforcement Cu-base composites contact wire according to claim 8, is characterized in that, in each described minor structure, and one or more carbon fiber bundle and the arrangement of one or more copper alloy silk weaving.
10. fiber reinforcement Cu-base composites contact wire according to claim 1, it is characterized in that, multiple described minor structure is comprised at the radial section of each characteristic cycle section, multiple described minor structure arranges around the Central Symmetry of described enhancing core, and carbon fiber bundle in each minor structure and copper alloy silk are around the central rotation of described minor structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510696148.8A CN105244070B (en) | 2015-10-23 | 2015-10-23 | Contact wire of fiber reinforced copper-based composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696148.8A CN105244070B (en) | 2015-10-23 | 2015-10-23 | Contact wire of fiber reinforced copper-based composite material |
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| CN105244070A true CN105244070A (en) | 2016-01-13 |
| CN105244070B CN105244070B (en) | 2024-05-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109378669A (en) * | 2018-12-10 | 2019-02-22 | 河北硅谷化工有限公司 | A kind of electric railway novel carbon fiber composite core contact line and its manufacture craft |
| CN110335702A (en) * | 2019-07-24 | 2019-10-15 | 宁波兴敖达金属新材料有限公司 | Special-shaped copper bar and electrified haulage vehicle touch conducting wire |
| CN114260439A (en) * | 2021-12-09 | 2022-04-01 | 中铁建电气化局集团康远新材料有限公司 | Production equipment and method for multi-point riveting type copper-steel composite contact line |
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Cited By (4)
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| CN109378669A (en) * | 2018-12-10 | 2019-02-22 | 河北硅谷化工有限公司 | A kind of electric railway novel carbon fiber composite core contact line and its manufacture craft |
| CN110335702A (en) * | 2019-07-24 | 2019-10-15 | 宁波兴敖达金属新材料有限公司 | Special-shaped copper bar and electrified haulage vehicle touch conducting wire |
| CN110335702B (en) * | 2019-07-24 | 2020-12-08 | 宁波兴敖达金属新材料有限公司 | Special-shaped copper bar and contact wire of electrified transport vehicle |
| CN114260439A (en) * | 2021-12-09 | 2022-04-01 | 中铁建电气化局集团康远新材料有限公司 | Production equipment and method for multi-point riveting type copper-steel composite contact line |
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