CN113351678A - Production equipment and method for dovetail type high-strength high-conductivity wear-resistant copper-steel composite contact wire - Google Patents
Production equipment and method for dovetail type high-strength high-conductivity wear-resistant copper-steel composite contact wire Download PDFInfo
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- CN113351678A CN113351678A CN202110583147.8A CN202110583147A CN113351678A CN 113351678 A CN113351678 A CN 113351678A CN 202110583147 A CN202110583147 A CN 202110583147A CN 113351678 A CN113351678 A CN 113351678A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a production device and a method of a dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line, which comprises a first mould, a second mould and a finishing mould which are sequentially arranged, wherein the first mould comprises an injection section and a cooling section, the injection section is provided with three injection ports for respectively injecting molten copper, copper-magnesium alloy furnace water and molten steel, the cooling section is provided with a first circulating cooling system, the second mould comprises an injection section and a cooling section, the injection section is provided with one injection port for injecting molten copper-steel mixed furnace water, and the cooling section is provided with a second circulating cooling system; and forming a contact line by drawing of the finishing die and rolling of the upper drawing wheel and the lower drawing wheel. The bottom of the contact line is continuously cast by 0.4 percent of copper-magnesium alloy to form a copper-magnesium alloy wear-resistant layer, so that the wear resistance of the contact line and a pantograph is improved, the wear of the contact part of the contact line is reduced, and the service life of the contact line is prolonged.
Description
Technical Field
The invention relates to the field of wires, in particular to production equipment and a method for a dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact wire.
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.
Disclosure of Invention
The invention aims to overcome the defects and provides production equipment and a method for a dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact wire, which overcome the mutual contradiction between the conductivity and the tensile strength, overcome the problems that copper, a coating layer and a steel core of copper-clad steel are separated from each other due to unmatched expansion systems and the like, and improve the tensile strength and the conductivity of the contact wire in a balanced manner.
The purpose of the invention is realized as follows:
the production equipment comprises a first mould, a second mould and a finishing mould which are sequentially arranged, wherein the first mould comprises an injection section and a cooling section, the injection section is provided with three injection ports for respectively injecting molten copper, copper-magnesium alloy furnace water and molten steel, the cooling section is provided with a first circulating cooling system, the second mould comprises an injection section and a cooling section, the injection section is provided with one injection port for injecting molten copper-steel mixed furnace water, and the cooling section is provided with a second circulating cooling system;
a steel cavity and a copper cavity which are distributed up and down are arranged in the first die, a solid separation section is arranged between the steel cavity and the copper cavity, and the solid separation section is in a dovetail shape; the steel cavity is communicated with a molten steel smelting furnace, and molten steel is poured in the pouring section; the copper cavity is divided into a copper cavity and a copper-magnesium composite cavity which are distributed up and down at an injection section through a partition plate, a copper water smelting furnace is communicated with the copper cavity, copper water is injected at the injection section, a copper-magnesium alloy furnace is communicated with the copper-magnesium composite cavity, and copper-magnesium alloy furnace water is injected at the injection section; a copper-steel mixing furnace water channel is arranged in the middle of the joint of the second die and the first die, one end of the copper-steel mixing furnace water channel extends out of the filling opening and is connected with the copper-steel mixing furnace, the other end of the copper-steel mixing furnace water channel extends to the middle of the second die and corresponds to the solid separation section of the first die, and the copper-steel mixing furnace water is filled into the corresponding position of the solid separation section; finally, a contact line is formed by drawing of the finishing die and rolling of the upper drawing wheel and the lower drawing wheel.
Further, the bottom of the contact line is made of 0.2% -0.8% of copper-magnesium alloy.
Further, the copper-steel mixed furnace water is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5.
Further, the arrangement mould is a large-small-head arrangement mould, and the cavity opening of the arrangement mould gradually shrinks by 1-2% from the foremost end to the rearmost end.
Further, the first circulating cooling system and the second circulating cooling system are servo cooling systems.
A production method of a dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line comprises the following steps:
a. respectively injecting molten steel, copper water and copper-magnesium alloy furnace water into a steel cavity, a copper cavity and a copper-magnesium composite cavity of a first die, and cooling the mixed liquid of the molten steel, the copper water and the copper-magnesium alloy furnace water to form a solid state through a circulating cooling system;
b. injecting the copper-steel mixed furnace water into a copper-steel mixed furnace water channel of a second die, and cooling the steel rod, the wear-resistant copper rod and the liquid copper-steel mixed furnace water through a circulating cooling system to form a solid state;
c. finally, a contact line is produced through the drawing of the finishing die and the drawing wheel.
Further, nitrogen protective gas is added into a molten steel melting furnace of the molten steel, and the pressure in the molten steel melting furnace is kept through a pressure regulating valve to form a steel rod; adding nitrogen protection gas into a copper water container, keeping the pressure in the container through a pressure regulating valve, and mixing the nitrogen protection gas and the copper water to form a wear-resistant copper rod; and adding nitrogen protective gas into a container of the copper-steel mixed furnace water, and keeping the pressure in the container through a pressure regulating valve to form a copper-steel composite layer.
Further, the copper-steel mixed furnace water is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5.
Furthermore, the copper-steel mixed furnace water is pressurized and propelled, the pressure is 1.02-1.05 standard atmospheric pressure, the phenomenon of delay is generated before the furnace water is carried out under the action of a cooling system, and the phenomenon of composite hollow, looseness and incompactness caused by pressurized propulsion is avoided.
Furthermore, the arrangement mould adopts a large-small head arrangement mould and a large-small head arrangement process.
Compared with the prior art, the invention has the beneficial effects that:
(1) the improvement of the contact line strength of the invention provides safer and wider space for the design of the high-speed railway contact network in China, and the improvement of the electrical conductivity can also save a large amount of electrical energy; meanwhile, corresponding independent innovation scientific research achievements can be generated in the aspects of production, test, construction, operation and the like, and the development of the high-speed contact network technology in China is greatly promoted; the invention can not only meet the requirement that the weight of a single piece of products such as an electrified railway contact line and the like is more than 1 ton, solve the important technical problem which puzzles the same industry in China, have important industrial popularization value, fill up a blank of the novel composite material production process in China, and have immeasurable practical significance for promoting the technical progress and the construction of independent innovation capacity of the copper processing industry.
(2) The bottom of the contact line is continuously cast by adopting 0.4 percent copper-magnesium alloy to form a copper-magnesium alloy wear-resistant layer, so that the wear resistance with the pantograph is improved, the wear of the contact part of the contact line is reduced, and the service life of the contact line is prolonged.
(3) The copper steel of the copper steel composite layer is compounded according to the atomic ratio of 1:1 through the copper and the iron, so that the copper steel composite layer is firmer than a direct compounding mode, a whole body which cannot fall off can be formed, the strength of the copper steel composite contact line is improved, and the firmness, the bonding degree and the integrity of the composite wire rod are strengthened.
Drawings
FIG. 1 is a schematic view of the structure of a production apparatus of the present invention.
Fig. 2 is a schematic cross-sectional view of a first mold of the present invention.
Fig. 3 is a schematic structural diagram of a contact wire product of the present invention.
Fig. 4 is a schematic wiring diagram of the contact wire of the present invention.
FIG. 5 is a schematic diagram showing a microstructure comparison of the composite layer of the present invention.
In the figure:
the copper-magnesium alloy hot metal drawing and cooling device comprises copper water 1, copper-magnesium alloy furnace water 2, molten steel 3, a first mold 4, a first circulating cooling system 5, a second mold 6, copper-steel mixed furnace water 7, a second circulating cooling system 8, a finishing mold 9, a drawing wheel 10, a contact line 11, a steel layer 11.1, a copper layer 11.2, a copper-steel composite layer 11.3, a copper-magnesium alloy wear-resistant layer 11.4 and a groove 11.5.
Detailed Description
For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the embodiments of the present invention, but are merely exemplary 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. 1-3, fig. 1 is a schematic structural diagram of a production device of a dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line. As shown in the figure, the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line production equipment comprises a first mold 4, a second mold 6 and a finishing mold 9 which are sequentially arranged, wherein the first mold 4 comprises an injection section and a cooling section, the injection section is provided with three injection ports for respectively injecting molten copper 1, copper-magnesium alloy furnace water 2 and molten steel 3, the cooling section is provided with a first circulating cooling system 5, the second mold 6 comprises an injection section and a cooling section, the injection section is provided with one injection port for injecting copper-steel mixed furnace water 7, and the cooling section is provided with a second circulating cooling system 8.
A steel cavity and a copper cavity which are distributed up and down are arranged in the first die 3, a solid separation section is arranged between the steel cavity and the copper cavity, and the solid separation section is in a dovetail shape; the steel cavity is communicated with a molten steel smelting furnace, and molten steel 3 is poured into the pouring section; the copper cavity is divided into a copper cavity and a copper-magnesium composite cavity which are distributed up and down at an injection section through a partition plate, a copper water smelting furnace is communicated with the copper cavity, copper water 1 is injected at the injection section, a copper-magnesium alloy furnace is communicated with the copper-magnesium composite cavity, and copper-magnesium alloy furnace water 2 is injected at the injection section; the first circulating cooling system 4 is used for cooling the mixed liquid of the molten steel 3, the molten copper 1 and the copper-magnesium alloy furnace water 2 into a solid state.
A copper-steel mixing furnace water channel is arranged in the middle of the joint of the second die 6 and the first die 3, one end of the copper-steel mixing furnace water channel extends out of the filling opening and is connected with the copper-steel mixing furnace, the other end of the copper-steel mixing furnace water channel extends to the middle of the second die 6 and corresponds to the solid separation section of the first die 4, and copper-steel mixing furnace water 7 is filled into the corresponding position of the solid separation section; the copper-steel mixed furnace water 7 is cooled by a second circulating cooling system 12 to form a solid copper-steel composite layer.
Finally, a contact line 11 is formed through drawing of the finishing die 9 and rolling of the upper drawing wheel 10 and the lower drawing wheel 10.
The trimming die 9 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 first circulating cooling system 5 and the second circulating cooling system 8 both 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
Referring to fig. 1-3, the production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line related by the invention comprises the following steps:
a. respectively injecting molten steel, copper water and copper-magnesium alloy furnace water into a steel cavity, a copper cavity and a copper-magnesium composite cavity of a first die, and cooling the mixed liquid of the molten steel, the copper water and the copper-magnesium alloy furnace water to form a solid state through a circulating cooling system;
before molten steel enters a die cavity, because the molten steel is in contact with air and contains oxygen, nitrogen protective gas is added into a molten steel melting furnace, a certain pressure intensity in the molten steel melting furnace is kept through a pressure regulating valve, 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 rod;
before the copper water enters the die cavity, because the copper water is in contact with air and is provided with oxygen, nitrogen protective gas is added into a container of the copper water, a certain pressure intensity in the container is kept through a pressure regulating valve, the pressure intensity is about 1.02 standard atmospheric pressure, and the purpose of adding the nitrogen protective gas is to isolate the air and the oxygen and mix with the copper-magnesium alloy furnace water to form a wear-resistant copper rod;
b. injecting the copper-steel mixed furnace water into a copper-steel mixed furnace water channel of a second die, and cooling the steel rod, the wear-resistant copper rod and the liquid copper-steel mixed furnace water through a circulating cooling system to form a solid state;
before the copper-steel mixed furnace water enters the die cavity, because the furnace water is in contact with air and contains oxygen, nitrogen protective gas is added into a container of the furnace water, a certain pressure in the container is kept through a pressure regulating valve, the pressure is approximately 1.02 standard atmospheric pressure, and the purpose of adding the nitrogen protective gas is to isolate air and oxygen to form a copper-steel composite layer;
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 pressure is 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;
through the continuous cold forging process of the continuous cold forging device, the combination part of the copper-steel composite layer and the copper and steel can be more compact;
c. finally, a contact line is produced through the drawing of the finishing die and the drawing wheel;
the arrangement mould adopts a large and small end arrangement mould, adopts a large and small end arrangement process, and after continuous casting, because crystal grains at the joint of the composite layer and the copper and steel are relatively thick and not compact in structure, the composite layer is combined with the copper and the steel more tightly and firmly by drawing of the large and small end arrangement mould, so that a copper and 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 depicts a schematic diagram of the contact wire structure of the present invention. As shown in the figure, the contact wire 11 comprises a wire body, the wire body comprises a steel layer 11.1, a copper layer 11.2, a copper-steel composite layer 11.3 and a copper-magnesium alloy wear-resistant layer 11.4, the steel layer 11.1 and the copper layer 11.2 are arranged up and down, the copper-steel composite layer 11.3 is arranged at the joint of the steel layer 11.1 and the copper layer 11.2, the steel layer 11.1 and the copper layer 11.2 are integrated through surface penetration through melting, and a dovetail-shaped copper-steel composite layer 11.3 is formed on the surface of the molten and penetrated layer; the steel layer 11.1 is equipped with the forked tail arch, copper layer 11.2 corresponds the forked tail arch and is equipped with the forked tail recess.
The bottom of the copper layer 11.2 is provided with a copper-magnesium alloy wear-resistant layer 11.4, the copper-magnesium alloy wear-resistant layer 11.4 is formed by continuous casting of 0.4% copper-magnesium alloy and is arranged at the bottom of the wire body to increase the wear resistance of the wire body and the pantograph and reduce the wear of the contact part of the contact wire, so that the service life of the contact wire is prolonged.
And a groove 11.5 is respectively arranged between the steel layer 11.1 and the copper layer 11.2 corresponding to two sides of the copper-steel composite layer 11.3.
Referring to fig. 4, fig. 5 depicts a wiring schematic of the present invention. As shown in the figure, the voltage symmetrical wiring method of the dovetail copper-steel composite contact line, which is related by the invention, comprises the following steps:
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 good tensile strength of steel and the good electrical conductivity of copper are utilized, so that the steel and the copper exert respective advantages, the advantages are made up, the reinforced wear-resistant, long-length, high-strength and high-conductivity dovetail type copper-steel composite contact line is formed, the copper-steel composite contact line is adopted to replace a copper alloy contact line, the copper alloy contact line has great advantages, the copper is an electrical good conductor, the electrical conductivity is different from that of copper alloy, the IACS can reach 100%, the line loss is greatly reduced, and resources are saved.
Referring to fig. 5, fig. 5 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 the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (10)
1. The production equipment of the dovetail type high-strength high-conductivity wear-resistant copper-steel composite contact line is characterized in that: the device comprises a first mould, a second mould and a finishing mould which are sequentially arranged, wherein the first mould comprises an injection section and a cooling section, the injection section is provided with three injection ports, copper water, copper-magnesium alloy furnace water and molten steel are respectively injected, the cooling section is provided with a first circulating cooling system, the second mould comprises an injection section and a cooling section, the injection section is provided with one injection port, copper-steel mixed furnace water is injected, and the cooling section is provided with a second circulating cooling system;
a steel cavity and a copper cavity which are distributed up and down are arranged in the first die, a solid separation section is arranged between the steel cavity and the copper cavity, and the solid separation section is in a dovetail shape; the steel cavity is communicated with a molten steel smelting furnace, and molten steel is poured in the pouring section; the copper cavity is divided into a copper cavity and a copper-magnesium composite cavity which are distributed up and down at an injection section through a partition plate, a copper water smelting furnace is communicated with the copper cavity, copper water is injected at the injection section, a copper-magnesium alloy furnace is communicated with the copper-magnesium composite cavity, and copper-magnesium alloy furnace water is injected at the injection section; a copper-steel mixing furnace water channel is arranged in the middle of the joint of the second die and the first die, one end of the copper-steel mixing furnace water channel extends out of the filling opening and is connected with the copper-steel mixing furnace, the other end of the copper-steel mixing furnace water channel extends to the middle of the second die and corresponds to the solid separation section of the first die, and the copper-steel mixing furnace water is filled into the corresponding position of the solid separation section; finally, a contact line is formed by drawing of the finishing die and rolling of the upper drawing wheel and the lower drawing wheel.
2. The production equipment of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 1 is characterized in that: the bottom of the contact line is made of 0.2% -0.8% of copper-magnesium alloy.
3. The production equipment of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 1 is characterized in that: the copper-steel mixed furnace water is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5.
4. The production equipment of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 1 is characterized in that: the arrangement mould is a big end and a small end arrangement mould, and the cavity opening of the arrangement mould is gradually contracted by 1-2% from the foremost end to the rearmost end.
5. The production equipment of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 1 is characterized in that: the first circulating cooling system and the second circulating cooling system are servo cooling systems.
6. The production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line is characterized by comprising the following steps of:
a. respectively injecting molten steel, copper water and copper-magnesium alloy furnace water into a steel cavity, a copper cavity and a copper-magnesium composite cavity of a first die, and cooling the mixed liquid of the molten steel, the copper water and the copper-magnesium alloy furnace water to form a solid state through a circulating cooling system;
b. injecting the copper-steel mixed furnace water into a copper-steel mixed furnace water channel of a second die, and cooling the steel rod, the wear-resistant copper rod and the liquid copper-steel mixed furnace water through a circulating cooling system to form a solid state;
c. finally, a contact line is produced through the drawing of the finishing die and the drawing wheel.
7. The production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 6, characterized in that: adding nitrogen protective gas into a molten steel smelting furnace of molten steel, and maintaining the pressure in the molten steel smelting furnace through a pressure regulating valve to form a steel rod; adding nitrogen protection gas into a copper water container, keeping the pressure in the container through a pressure regulating valve, and mixing the nitrogen protection gas and the copper water to form a wear-resistant copper rod; and adding nitrogen protective gas into a container of the copper-steel mixed furnace water, and keeping the pressure in the container through a pressure regulating valve to form a copper-steel composite layer.
8. The production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 6, characterized in that: the copper-steel mixed furnace water is formed by uniformly mixing copper and steel according to the mass ratio of 0.8-1.5.
9. The production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 6, characterized in that: the copper-steel mixed furnace water is pressurized and propelled, the pressure is 1.02-1.05 standard atmospheric pressure, the phenomenon of delay is generated before the furnace water is carried out under the action of a cooling system, and the phenomenon of composite hollowness, looseness and incompactness caused by pressurized propulsion is avoided.
10. The production method of the dovetail-shaped high-strength high-conductivity wear-resistant copper-steel composite contact line according to claim 6, characterized in that: the arrangement mould adopts a large and small head arrangement mould and a large and small head arrangement process.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433760A (en) * | 2022-01-04 | 2022-05-06 | 中铁建电气化局集团康远新材料有限公司 | Mortise and tenon type high-strength high-conductivity copper steel composite contact line production equipment and method |
| CN115213381A (en) * | 2022-09-19 | 2022-10-21 | 北京坤飞装备科技有限公司 | Connecting method for super-thick steel plates |
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