CN214796828U - Internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line - Google Patents
Internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line Download PDFInfo
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- CN214796828U CN214796828U CN202121156543.4U CN202121156543U CN214796828U CN 214796828 U CN214796828 U CN 214796828U CN 202121156543 U CN202121156543 U CN 202121156543U CN 214796828 U CN214796828 U CN 214796828U
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Abstract
The utility model relates to a wear-resisting copper steel composite contact line is reinforceed to big length height of interior outer type high-strength, it includes the wire rod body, the wire rod body includes steel core, copper layer, copper steel composite bed and copper magnesium alloy wearing layer, the outside of steel core is equipped with one deck copper steel composite bed, and the outside of copper steel composite bed is by the copper layer cladding, steel layer and copper layer combine as an organic wholely through the surface infiltration of copper steel composite bed melting each other, the bottom on copper layer is equipped with one deck copper magnesium alloy wearing layer. Utility model's bottom adopts 0.4% copper magnesium alloy continuous casting, forms one deck copper magnesium alloy wearing layer, increases with the wearability of pantograph, reduces the wearing and tearing of the contact segment of contact wire to increase the life of contact wire.
Description
Technical Field
The utility model relates to a wire rod field especially relates to an interior outer type large length height is strong leads and is reinforceed wear-resisting copper steel composite contact line.
Background
With the development of electronic information technology, the requirements for the comprehensive use performance of the copper alloy conductive material are higher and higher, and the copper alloy conductive material is required to maintain the characteristics of higher electrical conductivity, thermal conductivity, cold resistance, non-ferromagnetic property and the like while maintaining high strength (hardness), toughness and wear resistance. These excellent characteristics make copper alloys an important metal material for use in high-tech fields such as electric power, information, traffic, energy, light industry, and aerospace. In many cases, pure copper is rarely used because it has a low strength (230 to 300 MPa), and although it can reach 400 MPa after cold working, it has an elongation of only 2%, and its strengthening effect is easily lost when it is used under heating or at a certain temperature. Therefore, pure copper can be applied only to electric power, electric appliances, electric conductors, heat sinks, ornaments, etc., which are not subjected to much force. On the premise of keeping some excellent properties of pure copper, the strength (hardness) and wear resistance of copper are improved as much as possible, and then high-strength and high-conductivity copper alloys are gradually developed.
At present, Cu-Mg and Cu-Sn alloy contact wires are adopted by high-speed electrified railways, and the wires are all based on the premise of losing conductivity. Although the Cu-Cr-Zr contact line is still in the laboratory stage or the small batch test stage, although the improvement is improved to a certain extent on the original basis, the improvement extent is limited, chinese patent CN110660499A provides a long-length melt-infiltration type copper-steel composite wire, which greatly enhances the tensile strength of the wire and maintains higher conductivity, but the composite part in the middle of the alloy material has the highest strength, and the lower part of the contact line is worn more greatly after contacting with a pantograph for a long time, so that the service life of the contact line is shortened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned not enough, provide an wear-resisting copper steel composite contact line is reinforceed to big length height of interior external type high-strength, broken through electric conductivity and tensile strength contradiction each other, overcome copper clad steel's copper, coating, steel core because of the expansion system does not match reasons such as and difficult problems such as break away from each other, balanced improvement contact line's tensile strength and electric conductivity.
The purpose of the utility model is realized like this:
the internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact wire comprises a wire body, wherein the wire body comprises a steel core, a copper layer, a copper-steel composite layer and a copper-magnesium alloy wear-resistant layer, the copper layer is arranged outside the steel core, the copper layer is coated outside the copper-steel composite layer, the steel layer and the copper layer are mutually subjected to surface penetration and combined into a whole through the melting of the copper-steel composite layer, and the copper-magnesium alloy wear-resistant layer is arranged at the bottom of the copper layer.
The inner and outer type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line is characterized in that a copper-magnesium alloy wear-resistant layer is made of 0.2-0.8% of copper-magnesium alloy.
The inner and outer type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line is characterized in that a steel core and a copper-steel composite layer divide a copper layer into an upper part and a lower part, and two corresponding sides between the upper part and the lower part are respectively provided with a groove.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a bottom of contact wire adopts 0.4% copper magnesium alloy continuous casting, forms one deck copper magnesium alloy wearing layer, increases the wearability with the pantograph, reduces the wearing and tearing of the contact segment of contact wire to increase the life of contact wire.
(2) The utility model discloses a copper steel of copper steel composite bed passes through the copper iron and compounds according to 1:1 atomic ratio, and is more firm than direct compound mode, more can form the whole that can not drop, has improved the intensity of copper steel composite contact line, strengthens the firmness, the degree of combination and the wholeness of compound wire rod.
Drawings
Fig. 1 is a schematic structural diagram of the contact wire of the present invention.
Fig. 2 is a schematic structural diagram of the production equipment of the present invention.
Fig. 3 is a schematic diagram of the connection line of the present invention.
Fig. 4 is a schematic diagram showing the microstructure comparison of the composite layer of the present invention.
In the figure:
the device comprises a steel core 1, copper water 2, copper magnesium alloy furnace water 3, copper steel mixed furnace water 4, a first mold 5, a circulating cooling system 6, a finishing mold 7, a drawing wheel 8, a contact line 9, a steel core 9.1, a copper layer 9.2, a copper steel composite layer 9.3, a copper magnesium alloy wear-resistant layer 9.4 and a groove 9.5.
Detailed Description
For better understanding of the technical solution of the present invention, the following detailed description will be made with reference to the accompanying drawings. It should be understood that the following embodiments are not intended to limit the embodiments of the present invention, but only the embodiments of the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1:
referring to fig. 1, fig. 1 is a schematic diagram of the contact wire structure of the present invention. As shown in the figure, the contact wire 9 includes a wire body, the wire body includes a steel core 9.1, a copper layer 9.2, a copper-steel composite layer 9.3, and a copper-magnesium alloy wear layer 9.4, a copper-steel composite layer 9.3 is disposed outside the steel core 9.1, the copper-steel composite layer 9.3 is covered by the copper layer 9.2, a copper-magnesium alloy wear layer 9.4 is disposed at the bottom of the copper layer 9.2, and the copper-magnesium alloy wear layer 9.4 is formed by continuous casting of 0.4% copper-magnesium alloy, and is disposed at the bottom of the wire body to increase wear resistance with a pantograph, reduce wear of a contact portion of the contact wire, and thus increase a service life of the contact wire.
The steel core 9.1 and the copper-steel composite layer 9.3 divide the copper layer 9.2 into an upper part and a lower part, and two corresponding sides between the upper part and the lower part are respectively provided with a groove 9.5.
Referring to fig. 1-2, fig. 2 is a schematic structural diagram of production equipment for an internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line. As shown in the figure, the production equipment for the internal and external large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line comprises a first die 5, a circulating cooling system 6 and a finishing die 7; the first mold 5 comprises an injection section and a cooling section, the injection section is provided with five injection ports, and a steel core 1, copper water 2, copper-magnesium alloy furnace water 3 and copper-steel mixed furnace water 4 are respectively injected into the injection ports, and the cooling section is provided with a circulating cooling system 6.
A cylindrical steel core containing cavity is arranged in the first die 5 and used for placing the steel core 1; a circle of copper-steel composite cavity is arranged on the outer ring of the steel core containing cavity and connected with a copper-steel mixing furnace, and copper-steel mixing furnace water 4 is injected into the injection section; a copper cavity is respectively arranged above and below the copper-steel composite cavity, is communicated with the copper water smelting furnace, and is filled with copper water 2 at an injection section; a copper-magnesium composite cavity is arranged below the lower copper cavity and communicated with the copper-magnesium alloy furnace, and copper-magnesium alloy furnace water 3 is injected into the injection section; the circulating cooling system 6 is used for cooling the mixed liquid of the copper water 2, the copper magnesium alloy furnace water 3 and the copper steel mixed furnace water 4 to form a solid.
The arrangement die 7 is connected with the cooling section of the first die 5 and used for forming a contact line 9 in a drawing mode, an upper drawing wheel 8 and a lower drawing wheel 8 are arranged on one side of the arrangement die 7 and act on the upper surface and the lower surface of the contact line 9, so that the whole copper-steel composite contact line is subjected to drawing arrangement again, the copper-steel composite layer is combined with copper and steel more tightly and more firmly, and a copper-steel composite whole body which can not fall off is formed.
Before entering the first die 5, the steel core 1 enters a cleaning, descaling and drying device to remove impurities on the surface of the metal and remove moisture on the surface so as to avoid affecting composite forming.
The copper-steel mixed furnace water 4 is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5.
The trimming die 7 is a large-small-head trimming die, and the cavity opening of the trimming die gradually shrinks by about 1-2% from the foremost end to the rearmost end, so that the contact line is prevented from generating a gap between the contact line and the die after the whole contact line expands with heat and contracts with cold, and the forming of the contact line is prevented from being influenced; meanwhile, the die cavity is gradually contracted, so that the contact line is extruded to a certain degree, the internal crystal grains are tighter, and the strength is further enhanced.
The circulating cooling system 6 adopts a servo cooling system, so that the cooling system is uniformly cooled, and the phenomenon that crystals in contact wires generate large difference due to instability of the cooling system is avoided.
Referring to fig. 1-2, the utility model relates to a production method of inside and outside type large length high strength high conductivity reinforced wear-resisting copper steel composite contact line, which comprises the following contents:
a. producing a steel core by using molten steel; before molten steel enters the molten steel smelting furnace, because the molten steel contacts air and is provided with oxygen, nitrogen protective gas is added into the molten steel smelting furnace, a pressure regulating valve is used for keeping a certain pressure intensity in the molten steel smelting furnace, the pressure intensity is 1.02 standard atmospheric pressure, and the purpose of adding the nitrogen protective gas is to isolate air and oxygen to form a steel core.
b. Before the steel core enters the die, a cleaning, descaling and drying device is firstly carried out to remove impurities and water vapor on the surface of the metal so as to avoid affecting composite forming;
c. respectively injecting the steel core and the copper water, the copper-magnesium alloy furnace water and the copper-steel mixed furnace water into a steel core containing cavity, a copper-magnesium composite cavity and a copper-steel composite cavity of a first die, cooling the mixed liquid of the copper water, the copper-magnesium alloy furnace water and the copper-steel mixed furnace water into a solid state through a circulating cooling system, drawing the solid state through a finishing die to form a contact line with a copper-magnesium alloy layer at the bottom, and finally drawing the solid state for two times through a drawing wheel to form a copper-steel composite non-shedding whole.
Before the copper water enters the copper water melting furnace, the copper water is in contact with air and is provided with oxygen, nitrogen protective gas is added into the copper water melting furnace, a certain pressure intensity in the container is kept through a pressure regulating valve, the pressure intensity is about 1.02 standard atmospheric pressure, the purpose of adding the nitrogen protective gas is to isolate the air and the oxygen, and a copper rod is formed.
The copper-steel mixed furnace water is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5, and the temperature is controlled to be about 2000 ℃; the melting point of the steel is 1535 ℃, the melting point of the copper is 1083 ℃, when furnace water mixed with copper and steel at 2000 ℃ contacts the surface of the copper rod and the surface of the steel rod, the contact surface of the copper rod and the steel rod starts to melt due to the temperature of the furnace water reaching 2000 ℃, the copper in the furnace water and the copper in the copper rod are solidified together under the continuous action of a circulating cooling system, and the steel in the furnace water and the steel in the steel rod are solidified together in the same way, so that the copper rod, the furnace water and the steel rod form a firm and non-detachable whole;
the copper-steel mixed furnace water is pressurized and propelled, the pressurization is about 1.02-1.05 standard atmospheric pressure, and the phenomenon of composite hollowness, looseness and incompactness can be caused due to the phenomenon of delay before the furnace water is carried out under the action of a cooling system;
the circulating cooling systems adopt servo cooling systems, so that the cooling systems are uniformly cooled, and the phenomenon that crystals in contact wires generate large difference due to instability of the cooling systems is avoided;
finally, a contact line is formed by drawing through a finishing die, because grains at the joint of the composite layer and the copper and steel are thick and the structure is not compact, the composite layer is more tightly and firmly combined with the copper and steel by drawing through a large-small-head finishing die, and a copper-steel composite whole body which can not fall off is formed; through the effect of drawing wheel, make whole copper steel composite contact line through drawing the arrangement once more equally for the composite bed combines inseparabler with copper, steel, and is more firm, forms a copper steel complex whole that can not drop.
Referring to fig. 3, fig. 3 is a schematic diagram of the wiring of the present invention. As shown in the figure, the utility model relates to an inside and outside type copper steel composite contact line's voltage symmetry wiring method, including following content:
the copper-steel contact wire is hung, the two ends C and D of the copper layer are connected and electrified, the two ends A and B of the steel layer and the two ends E and F of the copper-steel composite layer are not electrified, current only flows between CDs at the moment, a good conductive effect is achieved, the tensile strength can be greatly improved, the safety coefficient of locomotive operation is improved, and meanwhile the good conductor effect of copper is fully exerted.
The copper is an electrical good conductor, different from copper alloy, the electric conductivity can reach 100% IACS, the line loss is greatly reduced, and resources are saved.
Referring to fig. 4, fig. 4 depicts a schematic comparison of the microstructure of a composite layer. As shown, black double arrows indicate metallic bonds between iron atoms, strong connections, gray double arrows indicate metallic bonds between copper atoms, strong connections, open double arrows indicate metallic bonds between iron atoms and copper atoms, weak connections; therefore, the copper-steel composite layer is far firmer than a copper-steel direct composite mode through a copper-iron atomic ratio of 1:1, and can form an integral body which cannot fall off. The copper-steel composite layer is compounded according to the copper-iron atomic ratio of 1:1, the relative atomic mass of copper atoms is 64, steel is a general name of iron-carbon alloy with the carbon content of 0.02-2.11% by mass, the relative atomic mass of iron atoms is 56, 0.02-2.11% of carbon atoms are added, and the relative atomic mass of carbon atoms is 12, namely copper-steel mixed furnace water is uniformly mixed by copper steel according to the mass ratio of 0.8-1.5.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (3)
1. The utility model provides an inside and outside type large length height is strong to lead to reinforce wear-resisting copper steel composite contact line which characterized in that: the wire rod comprises a wire rod body, wherein the wire rod body comprises a steel core, a copper layer, a copper-steel composite layer and a copper-magnesium alloy wear-resistant layer, the copper-steel composite layer is arranged outside the steel core, the copper layer covers the copper layer outside the copper-steel composite layer, the steel core and the copper layer are mutually subjected to surface penetration and combined into a whole through the melting of the copper-steel composite layer, and the copper-magnesium alloy wear-resistant layer is arranged at the bottom of the copper layer.
2. The internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line according to claim 1, characterized in that: the wear-resistant layer of the copper-magnesium alloy is 0.2-0.8% of the copper-magnesium alloy.
3. The internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line according to claim 1, characterized in that: the steel core and the copper-steel composite layer divide the copper layer into an upper part and a lower part, and two corresponding sides between the upper part and the lower part are respectively provided with a groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121156543.4U CN214796828U (en) | 2021-05-27 | 2021-05-27 | Internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121156543.4U CN214796828U (en) | 2021-05-27 | 2021-05-27 | Internal and external type large-length high-strength high-conductivity reinforced wear-resistant copper-steel composite contact line |
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