CN107739872B - A kind of Cu-Cr-Zr alloy contact line and its production technology - Google Patents
A kind of Cu-Cr-Zr alloy contact line and its production technology Download PDFInfo
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- CN107739872B CN107739872B CN201710906689.8A CN201710906689A CN107739872B CN 107739872 B CN107739872 B CN 107739872B CN 201710906689 A CN201710906689 A CN 201710906689A CN 107739872 B CN107739872 B CN 107739872B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
Abstract
The invention discloses a kind of Cu-Cr-Zr alloy contact line and its production technologies, by the copper of setting mass percent, chromium, zirconium and inevitable impurity element composition, when preparation, main technique includes raw material preparation, continuous up-casting, CONFORM is continuously extruded, it is cold worked for the first time, solution treatment, second of cold working, ageing treatment, pulling finished goods, Cu-Cr-Zr alloy contact line made of above-mentioned technique and material, by the proportion for reasonably adjusting contact line raw material, adjust the ratio of each element component in contact line, in conjunction with special production technology, single weight is able to produce out greater than 2 tons, conductivity 75-90%IACS, the high-strength highly-conductive contact line product of tensile strength 550-700MPa, the needs of electric railway high speed development instantly can preferably be met.
Description
Technical field
The present invention relates to field of cable technology, more specifically, it relates to a kind of Cu-Cr-Zr alloy contact line and its production
Technique.
Background technique
With the high speed development of electric railway, the requirement to contact net wire rod is higher and higher.It is required that contact net wire rod exists
There is high conductivity again while possessing high intensity.The high intensity of wire rod can increase the safety and stability of train operation, high
Conductivity can save loss of the electric energy in transmission process.
Contact line used in present electrification railway contact net mainly has fine copper, Kufil, copper magnesium alloy, copper-tin alloy
Four kinds of materials.Wherein the conductivity of fine copper contact line and Kufil contact line is 97%IACS, tensile strength range 350-
380MPa is applied to metro project mostly；The conductivity of copper tin alloy contact line is 72%IACS, tensile strength 430MPa or so；
The conductivity of low-intensity copper magnesium alloy contact wire is 77%IACS, tensile strength 420-440MPa；High-strength copper magnesium alloy contact wire
Conductivity 62%IACS, tensile strength 500MPa or so.High-strength copper magnesium alloy contact wire is applying for high-speed electric railway
Most product, but influenced by copper magnesium alloy strengthening mechanism, tensile strength and conductivity inversely, therefore copper
Magnesium alloy contact wire will be difficult to the high-strength highly-conductive demand for meeting increasingly developed electric railway to contact net wire rod.
Traditional Cu-Cr-Zr alloy mostly uses greatly the billet of major diameter to carry out horizontal type extruding, and the cylinder size that is squeezed limits, and one
The weight for criticizing bar material can only control within 200 kilograms, can not continuously produce the pole stock (contact for meeting contact line production length
Line production length determines that single demand weight is concentrated mainly on 1-2 tons of range according to station track anchor section), and above-mentioned pole stock produces
Contact line conductivity out is generally focused on 70% IACS or so, and tensile strength is usually less than 500MPa, in electric railway height
Today of speed development has been difficult to meet needs.
Summary of the invention
For this problem in practice, the object of the invention one is to provide a kind of Cu-Cr-Zr alloy contact line, purpose
Two are to provide a kind of production technology for manufacturing above-mentioned Cu-Cr-Zr alloy contact line, the Cu-Cr-Zr alloy contact line
Single weight is greater than 2 tons (containing within 2 tons), conductivity 75-90% IACS, tensile strength 550-700MPa, and concrete scheme is as follows:
A kind of Cu-Cr-Zr alloy contact line, the alloying element of the Cu-Cr-Zr alloy contact line include that mass percent is ω
(Cr)=0.15-1.2%, ω (Zr)=0.01-0.15%, surplus are copper and inevitable impurity element, wherein ω (Cu) >=
98%, ω (Cr)/ω (Zr)=9-12.
Further, above-mentioned contact line raw materials are produced as in tough cathode, copper chromium intermediate alloy or pure chromium and copper zirconium
Between alloy or pure zirconium, the Cr content range of the copper chromium intermediate alloy is 8-12%, and the Zr content range of copper zirconium intermediate alloy is
12-16%。
A kind of production technology making Cu-Cr-Zr alloy contact line, key step include: a. that raw material prepares, draws company on b.
It casts, c.CONFORM is continuously extruded, d. cold working for the first time, e. solution treatment, second of cold working of f., g. ageing treatment, h. drawing
Manufactured goods；
Wherein,
A. prepared by raw material: according to foregoing intermediate alloy proportion relation, preparing intermediate alloy;
B. it continuous up-casting: calculates and is added according to the alloy proportion of content range in the weight of tough cathode and step a
In the environment of completely cutting off air, the diameter for above drawing casting bar is 20-30mm, single to draw fast control for raw material, melting furnace and holding furnace work
System obtains bar base in 70-120kg/h；
C, CONFORM is continuously extruded: bar base manufactured by step b is continuously extruded by CONFORM, moulds of industrial equipment and pre-
500-700 DEG C of preheating temperature of hot rod material, 2h is kept the temperature, top clearance control is squeezed in 0.4-1.2mm, extrusion ratio control in 1.8-4
Shank diameter range 28-40mm, bar base inlet wire speed control is in 4-7m/min；
D, it is cold worked for the first time: the resulting bar base of above-mentioned steps c being machined to 22- using cold-rolling equipment or drawing equipment
30mm, total cold working amount > 40%；
E, solution treatment: solution treatment is carried out to the bar base that above-mentioned step d is obtained, 900-980 DEG C of solid solubility temperature, is dissolved
Time 30-90min, is immediately placed in quenching-in water after heating, quenching water temperature is lower than 25 DEG C, steeps in pond to room temperature；
F, it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 16- using drawing equipment
20mm, drawing speed are controlled in 15-30m/min, and cooling with emulsion spray, total cold deformation > 60%, and per pass is cold to be added
Work deflection > 20%；
G, ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 400-520 DEG C of aging temp,
Aging time 90-240min, cools to room temperature with the furnace；
H, pulling finished goods: bar base obtained by step g is drawn into contact line, drawing process is cooling using emulsion spray, draws
Speed control is pulled out in 15-20m/min.
Further, in step d, when using drawing as cold working means drawing speed control in 20-30m/min, and
It is cooling with emulsion spray；When using cold rolling as cold working means, cold rolling take-up speed is controlled in 15-20m/min.
Further, in step b, guarantee that crystallizer is cooling by the temperature of control casting bar and the water flow of crystallizer
Water Inlet and outlet water the temperature difference range is 8-12 DEG C.
Further, melting furnace and holding furnace are covered using graphite flakes or graphite particle in step b, and fire door is passed through inertia
Gas shield.
Through the above technical solutions, the melting furnace and holding furnace in step b are covered using graphite flakes or graphite particle, furnace
Mouthful be passed through inert gas shielding, can further contact of the air-isolation with copper liquid above draw the diameter of casting bar too in stepb
It is small that production capacity is be easy to cause to waste, but to will cause very much inhomogeneous cooling greatly even for diameter, is 20- through test confirmation diameter optimum range
30mm, Cu-Cr-Zr alloy draw speed it is too fast also be easy to cause cooling effect bad in addition draw it is disconnected, it is tests determined it is single on draw casting bar
Draw speed and should control in 70-120kg/h.In step c, at a high temperature of blank is generated by friction in continuously extruded process
Recrystallization, the crystal grain (CONFORM continuously extruded after bar base transverse direction grain size size < 0.03mm) of refinement casting bar, is improved most
The intensity and conductivity of finished product.Cold working is conducive to destroy original coarse-grained structure in step d, is conducive to solution treatment shape
At supersaturated solid solution.Solid solution is subsequent mainly for obtaining the supersaturated solid solution of CuCr and CuZr in bar base in step e
Aging precipitation reinforcing be ready.Cooling velocity has the institutional framework and performance of Cu-Cr-Zr alloy after solution treatment
Very big influence.Cooling speed be easy to cause very much the second mutually coarse and segregation slowly, therefore is immediately placed in after solution heat
Quenching-in water, until being cooled to room temperature.It is cold worked through second of step f, the cold deformation between solid solution and timeliness is produced to final
The tissue and performance of product have a significant impact.Pass through comparison " solid solution+water quenching+cold working+timeliness " and " solid solution+water quenching+timeliness "
Institutional framework, " solid solution+water quenching+cold working+timeliness " refine grain deformation while precipitated phase being made to be more evenly distributed.Through timeliness
After processing, tiny precipitating particle can be precipitated from the supersaturated solid solution of CuCr and CuZr, reach while improving tensile strength
With the strengthening effect of conductivity.
In summary technical solution and effect, compared with prior art, beneficial effects of the present invention are as follows:
By reasonably adjusting the proportion of contact line raw material, the ratio of each element component in contact line is adjusted, in conjunction with special
Production technology, be able to produce out single weight greater than 2 tons, the height of conductivity 75-90%IACS, tensile strength 550-700MPa
Strong height leads contact line product, can preferably meet the needs of electric railway high speed development instantly.
Detailed description of the invention
Fig. 1 is Cu-Cr-Zr alloy contact line structural schematic diagram of the invention；
Fig. 2 is Cu-Cr-Zr alloy contact line process flow chart of the invention.
Appended drawing reference: 1, Cu-Cr-Zr alloy contact line ontology；2, notch；3, telescopic mouth.
Specific embodiment
Below with reference to embodiment and figure, the present invention is described in further detail, but embodiments of the present invention not only limit
In this.
A kind of Cu-Cr-Zr alloy contact line, shape similarly to the prior art, as shown in Figure 1, mainly include copper chromium zirconium close
Golden contact line ontology 1, notch 2 and telescopic mouth 3.The alloying element of the Cu-Cr-Zr alloy contact line includes that mass percent is
ω (Cr)=0.15-1.2%, ω (Zr)=0.01-0.15%, surplus are copper and inevitable impurity element, wherein ω (Cu)
>=98%, ω (Cr)/ω (Zr)=9-12.
Produce above-mentioned contact line raw materials be tough cathode, copper chromium intermediate alloy or pure chromium and copper zirconium intermediate alloy or
Pure zirconium, the Cr content range of the copper chromium intermediate alloy are 8-12%, and the Zr content range of copper zirconium intermediate alloy is 12-16%.
Based on the component and raw material proportioning of above-mentioned Cu-Cr-Zr alloy contact line, the invention also provides be directed to above-mentioned connect
The production technology of line is touched, referring to fig. 2 (each embodiment processing parameter is different, only indicates the technological process of production herein), as follows:
Embodiment one:
A. prepared by raw material；
B. continuous up-casting: cathode plate, copper chromium intermediate alloy, copper zirconium intermediate alloy is used to carry out drawing company for raw material
Casting, copper liquid temperature are controlled at 1200-1300 DEG C, and single to draw speed control in 100kg/h, it is 8- that crystallizer cooling water, which passes in and out water temperature difference,
10 DEG C, the diameter for above drawing casting bar is 25mm, wherein ω (Cr)=0.72%, ω (Zr)=0.06%；
C.CONFORM is continuously extruded: 650 DEG C of moulds of industrial equipment and pre- hot material preheating temperature, keeps the temperature 2h, and top clearance control exists
0.6mm, extrusion ratio control squeeze shank diameter 36mm, bar base inlet wire speed control is in 5m/min 2.6；
D. it is cold worked for the first time: above-mentioned 36mm pressure ram being cold-rolled to 28mm using cold-rolling equipment or drawing equipment, it is total cold
Processing capacity > 40%, take-up uses detachable drum, by drum unloading, coil outer diameter 1.5m or so after take-up;
E. solution treatment solution treatment: is carried out to the bar base that above-mentioned step d is obtained.950 DEG C of solid solubility temperature, solution time
90min.It quenches water temperature and is lower than 25 DEG C, the time interval between heat preservation and quenching was steeped in pond to room temperature less than 1 minute;
F. it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 20mm using drawing equipment,
Drawing speed 15-20m/min, total cold deformation > 60%, per pass cold deformation > 20%, take-up to dismountable type disk have
On, unloading disk has after the completion of take-up, and coil outer diameter is less than 2m；
G. ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 480 DEG C of aging temp, timeliness
Time 150min；
H. pulling finished goods: bar base obtained by step g is drawn to 120mm2 contact line, drawing process is cold using emulsion spray
But.Drawing speed is controlled in 20m/min.
In step d, drawing speed control is in 20-30m/min when using drawing as cold working means, and uses emulsion
Spraying cooling；When using cold rolling as cold working means, cold rolling take-up speed is controlled in 15-20m/min.
After tested, gained contact line performance in the present embodiment one: tensile strength 600MPa, conductivity 80%IACS.
Embodiment two:
A. prepared by raw material；
B. continuous up-casting: using cathode plate, pure chromium, pure zirconium to carry out continuous up-casting for raw material, and copper liquid temperature control exists
It is 1300-1400 DEG C, single to draw speed control in 80kg/h, start to draw bar preincubation 2-3h to ensure that Cr, Zr element uniform dissolution enter
In Copper substrate, crystallizer cooling water passes in and out 8-10 DEG C of water temperature difference, and the diameter for above drawing casting bar is 30mm, using graphite particle or graphite
Scale covering, coverture thickness G T.GT.GT 15mm, fire door are constantly passed through inert gas shielding, copper water are avoided to contact with air, wherein ω
(Cr)=0.68%, ω (Zr)=0.07%;
C.CONFORM is continuously extruded: 650 DEG C of moulds of industrial equipment and pre- hot material preheating temperature, keeps the temperature 2h, and top clearance control exists
0.6mm, extrusion ratio control squeeze shank diameter 28mm, bar base inlet wire speed control is in 4m/min 2.6；
D. it is cold worked for the first time: above-mentioned 28mm pressure ram being cold-rolled to 22mm using cold-rolling equipment or drawing equipment, it is total cold
Processing capacity > 40%, take-up uses detachable drum, by drum unloading, coil outer diameter 1.5m or so after take-up；
E. solution treatment solution treatment: is carried out to the bar base that above-mentioned step d is obtained.900 DEG C of solid solubility temperature, solution time
50min, quenching water temperature are lower than 30 DEG C, and the shorter time interval between heat preservation and quenching the better, steeps in pond to room temperature；
F. it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 16mm using drawing equipment,
Drawing speed 20m/min, total cold deformation > 60%, per pass cold deformation > 20%, take-up to dismountable type disk have on,
Unloading disk has after the completion of take-up, and coil outer diameter is less than 2m；
G. ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 460 DEG C of aging temp, timeliness
Time 2h；
H. pulling finished goods: bar base obtained by step g is drawn to 150mm2 contact line, drawing process is cold using emulsion spray
But.Drawing speed is controlled in 20m/min.
In step d, drawing speed control is in 20-30m/min when using drawing as cold working means, and uses emulsion
Spraying cooling；When using cold rolling as cold working means, cold rolling take-up speed is controlled in 15-20m/min.
After tested, gained contact line performance in the present embodiment two: tensile strength 570MPa, conductivity 85%IACS.
Embodiment three:
A. prepared by raw material；
B. continuous up-casting: using cathode plate, pure chromium, pure zirconium to carry out continuous up-casting for raw material, and copper liquid temperature control exists
It is 1300-1400 DEG C, single to draw speed control in 70kg/h, start to draw bar preincubation 2-3h to ensure that Cr, Zr element uniform dissolution enter
In Copper substrate, crystallizer cooling water passes in and out 8-10 DEG C of water temperature difference, and the diameter for above drawing casting bar is 20mm, using graphite particle or graphite
Scale covering, coverture thickness G T.GT.GT 15mm, fire door are constantly passed through inert gas shielding, copper water are avoided to contact with air, wherein ω
(Cr)=0.15%, ω (Zr)=0.01%;
C.CONFORM is continuously extruded: 500 DEG C of moulds of industrial equipment and pre- hot material preheating temperature, keeps the temperature 2h, and top clearance control exists
0.4mm, extrusion ratio control squeeze shank diameter 40mm, bar base inlet wire speed control is in 4m/min 1.8；
D. it is cold worked for the first time: 28mm pressure ram in above-mentioned steps c is cold-rolled to 22mm；Total cold working amount > 40%, take-up
Using detachable drum, by drum unloading, coil outer diameter 1.5m or so after take-up；
E. solution treatment solution treatment: is carried out to the bar base that above-mentioned step d is obtained.980 DEG C of solid solubility temperature, solution time
50min, quenching water temperature are lower than 25 DEG C, and the shorter time interval between heat preservation and quenching the better, steeps in pond to room temperature；
F. it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 16mm using drawing equipment,
Drawing speed 20m/min, total cold deformation > 60%, per pass cold deformation > 20%, take-up to dismountable type disk have on,
Unloading disk has after the completion of take-up, and coil outer diameter is less than 2m；
G. ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 400 DEG C of aging temp, timeliness
Time 1.5h；
H. pulling finished goods: bar base obtained by step g is drawn to 150mm2 contact line, drawing process is cold using emulsion spray
But.Drawing speed is controlled in 20m/min.
After tested, gained contact line performance in the present embodiment three: tensile strength 570MPa, conductivity 85%IACS.
Example IV:
A. prepared by raw material；
B. continuous up-casting: using cathode plate, pure chromium, pure zirconium to carry out continuous up-casting for raw material, and copper liquid temperature control exists
It is 1300-1400 DEG C, single to draw speed control in 120kg/h, start to draw bar preincubation 2-3h to ensure that Cr, Zr element uniform dissolution enter
In Copper substrate, crystallizer cooling water passes in and out 8-10 DEG C of water temperature difference, and the diameter for above drawing casting bar is 30mm, using graphite particle or graphite
Scale covering, coverture thickness G T.GT.GT 15mm, fire door are constantly passed through inert gas shielding, copper water are avoided to contact with air, wherein ω
(Cr)=0.15%, ω (Zr)=0.01%;
C.CONFORM is continuously extruded: 700 DEG C of moulds of industrial equipment and pre- hot material preheating temperature, keeps the temperature 2h, and top clearance control exists
1.2mm, extrusion ratio control squeeze shank diameter 40mm, bar base inlet wire speed control is in 4m/min 4.0；
D. it is cold worked for the first time: 28mm pressure ram in above-mentioned steps c is cold-rolled to 30mm；Total cold working amount > 40%, take-up
Using detachable drum, by drum unloading, coil outer diameter 1.5m or so after take-up；
E. solution treatment solution treatment: is carried out to the bar base that above-mentioned step d is obtained.900 DEG C of solid solubility temperature, solution time
30min, quenching water temperature are lower than 90 DEG C, and the shorter time interval between heat preservation and quenching the better, steeps in pond to room temperature；
F. it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 16mm using drawing equipment,
Drawing speed 20m/min, total cold deformation > 60%, per pass cold deformation > 20%, take-up to dismountable type disk have on,
Unloading disk has after the completion of take-up, and coil outer diameter is less than 2m；
G. ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 520 DEG C of aging temp, timeliness
Time 3h；
H. pulling finished goods: bar base obtained by step g is drawn to 150mm2 contact line, drawing process is cold using emulsion spray
But.Drawing speed is controlled in 15m/min.
After tested, gained contact line performance in the present embodiment four: tensile strength 570MPa, conductivity 85%IACS.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of production technology for making Cu-Cr-Zr alloy contact line, which is characterized in that
The contact line is made of the material of following mass percent: ω (Cu) >=98%, ω (Cr)=0.15-1.2%, ω (Zr)=
0.01-0.15%, surplus are inevitable impurity element, wherein ω (Cr)/ω (Zr)=9-12；
The main raw material(s) of the contact line is tough cathode, copper chromium intermediate alloy, copper zirconium intermediate alloy or tough cathode, pure chromium, sea
Continuous zirconium, wherein the Cr content range of the copper chromium intermediate alloy is 8-12%, and the Zr content range of copper zirconium intermediate alloy is 12-
16%；
Production technology includes the following steps:
A, prepared by raw material: intermediate alloy proportion relation in Cu-Cr-Zr alloy contact line as described above prepares intermediate alloy；
B, continuous up-casting: calculating and be added raw material according to the alloy proportion of content range in the weight of tough cathode and step a,
Melting furnace and holding furnace completely cut off air operational, and the diameter for above drawing casting bar is 20-30mm, and single speed of drawing is controlled in 70-120kg/h,
Obtain bar base；
C, CONFORM is continuously extruded: by bar base manufactured by step b by CONFORM it is continuously extruded, moulds of industrial equipment and pre- hot rod
500-700 DEG C of preheating temperature of material keeps the temperature 2h, and top clearance control is controlled in 0.4-1.2mm, extrusion ratio in 1.8-4, and pressure ram is straight
Diameter range 28-40mm, bar base inlet wire speed control is in 4-7m/min；
D, it is cold worked for the first time: the pressure ram in above-mentioned steps c being machined to 22-30mm using cold-rolling equipment or drawing equipment,
Total cold working amount > 40%；
E, solution treatment: the bar base progress solution treatment that above-mentioned step d is obtained, 900-980 DEG C of solid solubility temperature, solution time
30-90min, is immediately placed in quenching-in water after heating, quenching water temperature is lower than 25 DEG C, steeps in pond to room temperature；
F, it is cold worked for second: the bar base of the resulting solution treatment of above-mentioned steps e being machined to 16-20mm using drawing equipment,
Drawing speed is controlled in 15-30m/min, and cooling with emulsion spray, total cold deformation > 60%, and per pass cold working becomes
Shape amount > 20%；
G, ageing treatment: by bar base vacuum heat treatment obtained by step f, inert gas shielding, 400-520 DEG C of aging temp, timeliness
Time 90-240min, cools to room temperature with the furnace；
H, pulling finished goods: being drawn into contact line for bar base obtained by step g, and drawing process is cooling using emulsion spray, drawing speed
Degree control is in 15-20m/min.
2. production technology according to claim 1, which is characterized in that in step d, when using drawing as cold working means
Drawing speed is controlled in 20-30m/min, and cooling with emulsion spray；When using cold rolling as cold working means, cold rolling take-up
Speed control is in 15-20m/min.
3. production technology according to claim 1, which is characterized in that in step b, pass through the temperature and knot of control casting bar
The water flow of brilliant device come guarantee crystallizer cooling water Inlet and outlet water the temperature difference range be 8-12 DEG C.
4. production technology according to claim 1, which is characterized in that melting furnace and holding furnace use graphite squama in step b
Piece or graphite particle covering, fire door are passed through inert gas shielding.
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