CN114713650A - Production process and device of high-ductility and high-softening-resistance copper-chromium-zirconium contact line - Google Patents
Production process and device of high-ductility and high-softening-resistance copper-chromium-zirconium contact line Download PDFInfo
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- CN114713650A CN114713650A CN202210327881.2A CN202210327881A CN114713650A CN 114713650 A CN114713650 A CN 114713650A CN 202210327881 A CN202210327881 A CN 202210327881A CN 114713650 A CN114713650 A CN 114713650A
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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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
-
- 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
- B21C19/00—Devices for straightening wire or like work combined with or specially adapted for use in connection with drawing or winding machines or apparatus
-
- 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
- B21C9/00—Cooling, heating or lubricating drawing material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line, which comprises the following steps: step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine; step two, online aging: the copper-chromium-zirconium rod coming out of the five-die giant drawing machine enters an online aging device to be heated; step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling, and a finished product with qualified performance is obtained; step four, packaging: and straightening the finished product by a straightening machine and then winding the finished product by a winding machine. The invention has simple process flow, ensures the strength, and is more beneficial to prolonging the service life of the contact wire due to high ductility and high softening rate.
Description
Technical Field
The invention relates to the technical field of production of contact wires for overhead flexible contact lines, in particular to a production process and a device of a high-ductility and high-softening-resistance copper-chromium-zirconium contact wire.
Background
The production of the continuous extrusion copper chromium zirconium contact line in the current market adopts a process route of continuous extrusion copper rod-drawing-aging-drawing-packaging, the continuously extruded copper chromium zirconium rod is firstly drawn into a semi-finished product by a five-die giant drawing machine, then the semi-finished product is placed on a bell jar furnace for vacuum aging, the bell jar furnace is dependent on radiation heat transfer, the heat preservation time is longer, the heat preservation time is usually 12 hours, the finished product is drawn by the five-die giant drawing machine after aging, and the finished product is straightened by a straightening machine and then wound by a winding machine. The softening rate and the elongation of the copper-chromium-zirconium contact line produced in the way just meet the iron standard TB/T2809-.
Disclosure of Invention
The invention aims to overcome the defects and provides a production process and a device of a high-ductility and high-softening-resistance copper-chromium-zirconium contact wire, which ensure the strength and are more favorable for prolonging the service life of the contact wire at the same time of high ductility and high softening rate.
The purpose of the invention is realized as follows:
a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine;
step two, online aging: the copper-chromium-zirconium rod coming out of the five-die giant drawing machine enters an online aging device to be heated;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling, and a finished product with qualified performance is obtained;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
Preferably, the online aging device adopts a through type induction coil for heating.
Preferably, the heating time of the online aging device is 10-30s, and the heating temperature is kept at 360-420 ℃.
Preferably, the running speed of the copper chromium zirconium rod and the length of the online aging device are controlled to ensure that the copper chromium zirconium rod has time to stay in the online aging device.
A production device adopted by a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact wire comprises a pay-off machine, a five-die giant drawing machine, an online aging device, an online cooling device, a straightening machine and a take-up machine which are sequentially arranged, wherein a copper-chromium-zirconium rod which is continuously extruded is directly drawn to a finished product shape on the five-die giant drawing machine, then sequentially enters the online aging device and the online cooling device, and finally is wound by the take-up machine after being straightened by the straightening machine.
The invention has the beneficial effects that:
the invention has simple process flow, the continuously extruded copper-chromium-zirconium rod is directly drawn to the shape of a finished product on a five-die giant drawing machine, and the strength is ensured, and simultaneously the ductility and the softening rate are high through on-line aging and cooling, thereby being more beneficial to prolonging the service life of the contact line.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic structural diagram of the prior art.
Wherein: a paying-off machine 1; a five-die giant drawing machine 2; a bell jar furnace 3; an online aging device 4; an in-line cooling device 5; a straightening machine 6; and a take-up machine 7.
Detailed Description
Referring to fig. 1, the invention relates to a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line, which comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod on a five-die giant drawing machine to obtain a finished product;
step two, online aging: the copper-chromium-zirconium rod from the five-die giant drawing machine enters an online aging device for heating, the online aging device adopts a through induction coil for heating, the heating time is 10-30s, the heating time is shortened, the working efficiency is improved, and the heating temperature is kept at 360-420 ℃; the dislocation generated by drawing influences the ductility of the product, the dislocation generated in the drawing process can be eliminated at the temperature of online aging, although the aging also has certain deformation, the deformation amount is small (even can be ignored) and can be finely adjusted by a straightening machine, so that the online aging ensures the strength of the finished product and simultaneously ensures the high ductility of the finished product;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling, and a finished product with qualified performance is obtained;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
The running speed of the copper chromium zirconium rod and the length of the online aging device are controlled to ensure that the copper chromium zirconium rod stays in the online aging device for 10-30S, so that the copper chromium zirconium rod out of the online aging device keeps at the temperature of 360-420 ℃.
The utility model provides a high ductility high anti production device who softens copper chromium zirconium contact line, is including paying out machine 1, five mould huge drawing machines 2, online ageing device 4, online cooling device 5, straightener 6 and admission machine 7 that set gradually, and the copper chromium zirconium pole that even extrudes comes directly draws to the finished product shape on five mould huge drawing machines, then gets into online ageing device and online cooling device in proper order, is rolled up by the admission machine after at last straightening through the straightener.
Example 1:
a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine;
step two, online aging: the copper-chromium-zirconium rod from the five-die giant drawing machine enters an online aging device for heating, the online aging device adopts a through induction coil for heating, the heating time is 10s, the heating time is shortened, the working efficiency is improved, and the heating temperature is kept at 385-410 ℃;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling, and a finished product with qualified performance is obtained;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
The running speed of the copper chromium zirconium rod and the length of the online aging device are controlled to ensure that the copper chromium zirconium rod stays in the online aging device for 10S, so that the copper chromium zirconium rod out of the online aging device keeps 385-410 ℃.
Example 2:
a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine;
step two, online aging: the copper-chromium-zirconium rod coming out of the five-die giant drawing machine enters an online aging device for heating, the online aging device adopts a through induction coil for heating, the heating time is 20s, the heating time is shortened, the working efficiency is improved, and the heating temperature is kept at 375 plus 390 ℃;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling, and a finished product with qualified performance is obtained;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
The running speed of the copper chromium zirconium rod and the length of the online aging device are controlled to ensure that the copper chromium zirconium rod stays in the online aging device for 20S, so that the copper chromium zirconium rod out of the online aging device keeps 375-390 ℃.
Example 3:
a production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine;
step two, online aging: the copper-chromium-zirconium rod from the five-die huge drawing machine enters an online aging device for heating, the online aging device adopts a through induction coil for heating, the heating time is 30s, the heating time is shortened, the working efficiency is improved, and the heating temperature is kept at 365-;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling to obtain a finished product with qualified performance;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
The running speed of the copper chromium zirconium rod is controlled to ensure that the copper chromium zirconium rod stays in the online aging device for 30S, so that the copper chromium zirconium rod out of the online aging device keeps 365-.
Comparative example 1:
as shown in figure 2, a continuously extruded copper-chromium-zirconium rod is firstly drawn into a semi-finished product through four dies by a five-die giant drawing machine 2, then is placed on a bell jar furnace 3 for vacuum aging, the bell jar furnace 3 is in heat conduction by radiation, the heat preservation time is longer, the heat preservation time is usually 12 hours, after aging, the semi-finished product is drawn into a finished product through the last die of the five-die giant drawing machine 2, and the finished product is straightened by a straightening machine 6 and then is wound by a winding machine 7.
Comparative example 2:
the continuously extruded copper-chromium-zirconium rod is firstly drawn into a semi-finished product by a five-die giant drawing machine through three dies, then placed on a bell jar furnace for vacuum aging, the bell jar furnace is used for transferring heat by radiation, the heat preservation time is longer, the heat preservation time is usually 12 hours, after aging, the finished product is drawn into a finished product by the last two dies of the five-die giant drawing machine, and the finished product is straightened by a straightening machine and then wound by a winding machine.
The copper chromium zirconium contact lines produced in examples 1-3 and comparative examples 1-2 were compared in performance, and the results were as follows:
as can be seen from the above table, the strength of the examples 1-3 is not much different from that of the comparative examples 1-2, and the iron standard requirement (not less than 560 MPa) is met, while the elongation of the examples 1-3 is much higher than that of the comparative example 1, the improved process improves the product plasticity, the on-site construction difficulty of the product is reduced, and the product is easier to pay off by a straightening device.
The softening rates of examples 1 to 3 were as high as 100% and higher than those of comparative examples 1 to 2, and examples 1 to 3 had high softening resistance because the higher the softening rate was, the stronger the softening resistance was. Since comparative examples 1 and 2 were aged in advance, drawing dislocations were not completely removed, and the softening rate was tested at 300 c, a part of dislocations were removed during heating, so that the softening rate was deteriorated.
The improved process can improve the softening resistance of the product, the contact net is used as main power supply equipment of a high-speed rail line, the contact net arcing is a discharge phenomenon caused by breakdown of an air gap due to unstable contact between the contact net and a pantograph in the dynamic operation process, and the arcing phenomenon is thermal plasma, so that the contact line is softened, and the service life is shortened. The contact wire of the new process has better softening resistance while ensuring the strength, so the service life is longer.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (5)
1. A production process of a high-ductility and high-softening-resistance copper-chromium-zirconium contact line is characterized by comprising the following steps of: the method comprises the following steps:
step one, drawing: directly drawing the continuously extruded copper-chromium-zirconium rod to the shape of a finished product on a five-die giant drawing machine;
step two, online aging: the copper-chromium-zirconium rod coming out of the five-die giant drawing machine enters an online aging device to be heated;
step three, online cooling: the copper-chromium-zirconium rod material coming out of the online aging device enters an online cooling device for water cooling to obtain a finished product with qualified performance;
step four, packaging: and straightening the finished product by a straightening machine and then rolling the finished product by a wire rewinding machine.
2. The production process of the high-ductility and high-softening-resistance copper-chromium-zirconium contact line according to claim 1, characterized in that: the online aging device adopts a through type induction coil for heating.
3. The production process of the high-ductility and high-softening-resistance copper-chromium-zirconium contact line according to claim 1, characterized in that: the heating time of the online aging device is 10-30s, and the heating temperature is kept at 360-420 ℃.
4. The production process of the high-ductility and high-softening-resistance copper-chromium-zirconium contact line according to claim 1, characterized in that: the running speed of the copper chromium zirconium rod and the length of the online aging device are controlled, and the copper chromium zirconium rod is ensured to have time to stay in the online aging device.
5. The production device adopted by the production process of the high-ductility and high-softening-resistance copper-chromium-zirconium contact line disclosed by any one of claims 1 to 4 is characterized in that: the continuous extrusion copper-chromium-zirconium rod is directly drawn to a finished product shape on the five-die giant drawing machine, then sequentially enters the online aging device and the online cooling device, and finally is wound by the winding machine after being straightened by the straightening machine.
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