CN108062992A - Copper clad steel composite shielding cable steel wire rod and its production method - Google Patents
Copper clad steel composite shielding cable steel wire rod and its production method Download PDFInfo
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- CN108062992A CN108062992A CN201711084878.8A CN201711084878A CN108062992A CN 108062992 A CN108062992 A CN 108062992A CN 201711084878 A CN201711084878 A CN 201711084878A CN 108062992 A CN108062992 A CN 108062992A
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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
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/02—Single bars, rods, wires, or strips
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The present invention relates to a kind of copper clad steel composite shielding cable steel wire rod and its production methods, belong to communication cable steel technical field.The steel wire rod chemical composition and mass percentage are C≤0.010%, Si≤0.010%, Mn≤0.07%, P≤0.010%, S≤0.010%, Al≤0.004%, Ti≤0.003%, B:0.0060~0.0120%, surplus is Fe and inevitable impurity.The production method includes steel billet smelting, heating steel billet, wire rod rolling and wire rod cooling process；For heating process using continuous casting billet heating and hot rolling base reheating mode, furnace temp is 1150 ± 10 DEG C；Wire rod cooling process uses retarded cooling process.Shielding line of the present invention is excellent with steel wire rod drawing property and electric conductivity, can realize and be drawn to 0.08mm not fracture of wires, conductivity is up to more than 16.3%.
Description
Technical field
The present invention relates to a kind of copper clad steel composite shielding cable steel wire rod and its production methods, belong to communication cable steel skill
Art field.
Background technology
Copper clad steel is a kind of composite wire of steel wire periphery package layers of copper, combines the excellent properties of copper and steel, compared with
Pure copper material has many advantages, such as that at low cost, light-weight, intensity is high, is widely used in communication cable industry.Shielding line is copper clad steel
Middle drawing amount is maximum（A diameter of 0.08-0.12mm after drawing）One of product, electric conductivity and drawing property requirement to steel
It is high.Shielding line currently on the market is mainly the ultra-low-carbon steels material such as CH1T with steel, can drawing with excellent drawing property
To 0.08mm not fracture of wires, but conductivity is relatively low（About 13%）, and in order to improve the overall conductivity of composite material, it is necessary to increase plating
The thickness of layers of copper.
Patent application CN104294150A discloses a kind of " shielding line steel and its production method ", chemical composition：C:
0.001-0.05%, Si:0.001-0.1%, Mn:0.05-0.20%, P≤0.015%, S≤0.010%, Ti:0.01-0.025%, can
Meet the drawing requirement of shielding line 0.08-0.10mm filaments, but the conductivity of finished product is not reported.Patent application
CN102268595A discloses a kind of " copper clad steel and its production method ", chemical composition：C≤0.01%, Si≤
0.009%, Mn:0.05-0.12%, Als:0.008-0.015%, P≤0.015%, S≤0.010%, conductivity up to 15.9% and
More than, but the minimum diameter that can be pulled to is not reported.Patent application CN103469061A discloses a kind of " conduction ultra-low-carbon steel
Wire rod and its production method ", the chemical composition proportioning of steel wire rod：C:0.002-0.005%, Si:0.004-0.010%, Mn:
0.05-0.15%, P≤0.015%, S≤0.010%, total oxygen 0.0050-0.0080%, full aluminium≤0.0050%, wire rod crystallite dimension
At 20-40 μm, conductivity >=15%, but its drawing property is not reported.
Therefore, there is an urgent need for develop shielding line steel wire rod that is a kind of while having excellent drawing property and electric conductivity.
The content of the invention
The technical problems to be solved by the invention are to provide copper that is a kind of while having excellent drawing property and electric conductivity
Baogang's composite shielding cable steel wire rod, this steel wire rod can meet the drawing property requirement for producing superfine shielding line and carry
High steel wire conductivity reduces manufacture cost so as to reduce thickness of coated copper layer.
The present invention also provides a kind of production methods of copper clad steel composite shielding cable steel wire rod.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of copper clad steel composite shielding cable steel wire
Material, the steel wire rod chemical composition and its mass percentage be C≤0.010%, Si≤0.010%, Mn≤0.07%, P≤
0.010%, S≤0.010%, Al≤0.004%, Ti≤0.003%, B:0.0060~0.0120%, surplus is for Fe and inevitably
Impurity.
The microscopic structure of steel wire rod of the present invention is made of ferrite and cementite, wherein ferrite grain size≤6 grade.
The specification of steel wire rod of the present invention be 5.5~7.0mm of Φ, conductivity >=16.3%, tensile strength≤290MPa,
Elongation >=50%, reduction of area >=80%.
The chemical composition composition of steel wire rod of the present invention is illustrated below：
Carbon：Mainly with carbide（Fe3C）Form is present in steel, is the one of the chief elements for the intensity for determining steel.When containing in steel
When C amounts raise, hardness, the intensity of steel improve, and plasticity, toughness and impact flexibility reduce.Carbon content is below 0.010%
When, carbon mainly exists in ferrite in the form of interstitial atom, can be distorted lattice, can generate electron scattering；When big
When 0.010%, there is part carbon with carbide（Fe3C）Form is present in steel, can hinder electronics directed movement, and resistance increases
Add, conductivity reduces.For shielding line steel, should try one's best reduces C content.
Silicon：The hardness and strength of ferrite and austenite can be improved, the solution strengthening performance of steel is also remarkably improved, bends
Clothes point and elastic limit, but elongation percentage, shrinking percentage and the impact flexibility of steel is made to decrease.In addition, leading for steel can be significantly reduced
Electric rate, therefore, for shielding line steel, should try one's best reduces silicone content.
Manganese：Dissolve in ferrite（α-Fe）In, and dissolve in and carbide is formed in cementite, increase the intensity of steel.In addition,
Manganese can reduce the conductivity of steel, and resistivity accordingly increases, and therefore, for shielding line steel, should try one's best reduces manganese content.
Phosphorus：Phosphorus forms clearance-type solid solution in steel, there is solution strengthening effect, improves the intensity of steel, reduces the plasticity of steel
And toughness, meanwhile, lattice can be distorted, generate electron scattering, the conductivity of steel can be made reduce, therefore, shielding line is used
For steel, should try one's best reduces P content.
Sulphur：Mainly exist in the form of non-metallic inclusion, with steel be harmful element to shielding line, should try one's best, which reduces it, contains
Amount.
Aluminium：Aluminium is deoxidant element, can reduce the oxygen content of steel, while aluminium combines to form AlN with nitrogen, and there is crystal grain thinning to make
With, tiny crystal grain is unfavorable for the conductivity of wire rod, and can raise wire rod tensile strength, therefore, for shielding line steel,
Aluminium content should be more low better.
Titanium：One side titanium can be combined with the nitrogen in steel, reduce the content of free nitrogen, reduce the work hardening rate of steel；Separately
On the one hand, titanium can form tiny carbonitride in steel, play the effect of disperse educt reinforcing and refined crystalline strengthening, can make steel
Tensile strength raises, and conductivity reduces.For the high shielding line steel of conductivity requirements, Ti content should be more low better.
Boron：On the one hand boron can make ferrite crystal grain coarsening, coarse crystal grain can improve the conductivity of wire rod；The opposing party
Face boron and nitrogen, which combine to form BN, reduces the nitrogen being dissolved in steel, the intensity and work hardening rate of wire rod can be reduced, beneficial to drawing
The improvement of performance.Therefore, for shielding line steel, suitable boron element can be added to improve comprehensive performance.The present invention
By test of many times, the additive amount for determining boron is 0.0060~0.0120%.
The present invention also provides a kind of production method of copper clad steel composite shielding cable steel wire rod, the production method includes
Steel billet smelting, heating steel billet, wire rod rolling and wire rod cooling process.
The steel billet chemical composition and its mass percentage are C≤0.010%, Si≤0.010%, Mn≤0.07%, P≤
0.010%, S≤0.010%, Al≤0.0040%, Ti≤0.0030%, B:0.0060~0.0120%, surplus is for Fe and unavoidably
Impurity.
The steel billet smelting procedure includes successively：Desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, RH stoves
Refining.
The heating steel billet process using continuous casting billet heating and hot rolling base reheating mode, furnace temp for 1150 ±
10℃；The total time of continuous casting billet in heating furnace is 180~240min, oxygen content≤6% in stove；Hot rolling base is in heating furnace
Total time is 90~120min, oxygen content≤6% in stove.
The wire rod rolling process, 980 ± 10 DEG C of final rolling temperature, 970 ± 10 DEG C of laying temperature.
The wire rod cooling process uses retarded cooling process, insulation cover Close All on stelmor roller-way, and cooling blower is complete
Portion closes, and roller table speed is 0.2~0.4m/s.
It is using advantageous effect caused by above-mentioned technical proposal：1. the present invention makes full use of the grain coarsening of boron to make
With obtaining the ultra-low-carbon steel wire rod of grain size≤6 grade；2. the present invention is obtained by nitrogen fixation and the grain coarsening effect of boron
Shielding line steel wire rod with good drawing property can be drawn to 0.08mm not fracture of wires；3. shielding line produced by the invention is used
Steel wire rod conductivity >=16.3% can reduce the thickness of coated copper layer of downstream client, reduce manufacture cost.
The copper clad steel composite shielding cable steel wire rod of the method for the present invention production, can realize and be drawn to 0.08mm not fracture of wires,
And conductivity has excellent drawing property and electric conductivity up to more than 16.3%.
Description of the drawings
Fig. 1 is the micro-organization chart of 1 shielding line steel wire rod of the embodiment of the present invention.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
Embodiment 1
This shielding line is Φ 5.5mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.010%, Si:
0.005%, Mn:0.05%, P:0.010%, S:0.004%, Al:0.0020%, Ti:0.0015%, B:0.0060%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1150
℃；The total time of continuous casting billet in heating furnace is 230min, oxygen content 6% in stove；The total time of hot rolling base in heating furnace is
105min, oxygen content 6% in stove.
（3）Wire rod rolling process：975 DEG C of final rolling temperature, 967 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.20m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.3%, tension
Intensity 255MPa, elongation 52%, reduction of area 85%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
3.5 grades, microscopic structure is as shown in Figure 1（The microscopic structure of remaining embodiment shielding line steel wire rod is similar to Fig. 1, Gu Sheng
Slightly）.
Embodiment 2
This shielding line is Φ 7.0mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.005%, Si:
0.006%, Mn:0.03%, P:0.005%, S:0.010%, Al:0.0032%, Ti:0.0030%, B:0.0112%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1160
℃；The total time of continuous casting billet in heating furnace is 210min, oxygen content 5% in stove；The total time of hot rolling base in heating furnace is
115min, oxygen content 5% in stove.
（3）Wire rod rolling process：985 DEG C of final rolling temperature, 965 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.30m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.7%, tension
Intensity 260MPa, elongation 50%, reduction of area 88%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
4 grades.
Embodiment 3
This shielding line is Φ 5.5mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.003%, Si:
0.010%, Mn:0.06%, P:0.007%, S:0.003%, Al:0.0016%, Ti:0.0020%, B:0.0069%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1140
℃；The total time of continuous casting billet in heating furnace is 190min, oxygen content 4% in stove；The total time of hot rolling base in heating furnace is
120min, oxygen content 5% in stove.
（3）Wire rod rolling process：982 DEG C of final rolling temperature, 973 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.35m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.5%, tension
Intensity 265MPa, elongation 55%, reduction of area 80%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
4 grades.
Embodiment 4
This shielding line is Φ 5.5mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.004%, Si:
0.003%, Mn:0.04%, P:0.006%, S:0.004%, Al:0.0021%, Ti:0.0012%, B:0.0094%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1155
℃；The total time of continuous casting billet in heating furnace is 240min, oxygen content 5% in stove；The total time of hot rolling base in heating furnace is
110min, oxygen content 3% in stove.
（3）Wire rod rolling process：990 DEG C of final rolling temperature, 980 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.40m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.6%, tension
Intensity 270MPa, elongation 53%, reduction of area 87%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
5 grades.
Embodiment 5
This shielding line is Φ 7.0mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.002%, Si:
0.004%, Mn:0.07%, P:0.004%, S:0.003%, Al:0.0009%, Ti:0.0005%, B:0.0085%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1151
℃；The total time of continuous casting billet in heating furnace is 180min, oxygen content 3% in stove；The total time of hot rolling base in heating furnace is
100min, oxygen content 6% in stove.
（3）Wire rod rolling process：970 DEG C of final rolling temperature, 960 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.25m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.8%, tension
Intensity 275MPa, elongation 52%, reduction of area 87%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
5 grades.
Embodiment 6
This shielding line is Φ 6.5mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.003%, Si:
0.005%, Mn:0.05%, P:0.005%, S:0.004%, Al:0.0040%, Ti:0.0021%, B:0.0120%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1146
℃；The total time of continuous casting billet in heating furnace is 200min, oxygen content 5% in stove；The total time of hot rolling base in heating furnace is
90min, oxygen content 4% in stove.
（3）Wire rod rolling process：980 DEG C of final rolling temperature, 975 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.32m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.7%, tension
Intensity 280MPa, elongation 52%, reduction of area 84%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
6 grades.
Embodiment 7
This shielding line is Φ 6.0mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.008%, Si:
0.009%, Mn:0.065%, P:0.010%, S:0.009%, Al:0.0035%, Ti:0.0027%, B:0.0105%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1158
℃；The total time of continuous casting billet in heating furnace is 220min, oxygen content 6% in stove；The total time of hot rolling base in heating furnace is
95min, oxygen content 3% in stove.
（3）Wire rod rolling process：990 DEG C of final rolling temperature, 978 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.23m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.4%, tension
Intensity 264MPa, elongation 53%, reduction of area 83%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
4 grades.
Embodiment 8
This shielding line is Φ 6.7mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.007%, Si:
0.007%, Mn:0.02%, P:0.009%, S:0.007%, Al:0.0025%, Ti:0.0018%, B:0.0060%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1142
℃；The total time of continuous casting billet in heating furnace is 185min, oxygen content 2% in stove；The total time of hot rolling base in heating furnace is
115min, oxygen content 6% in stove.
（3）Wire rod rolling process：985 DEG C of final rolling temperature, 980 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.37m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.5%, tension
Intensity 268MPa, elongation 54%, reduction of area 85%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
5 grades.
Embodiment 9
This shielding line is Φ 6.0mm with the specification of steel wire rod, and chemical composition and mass percentage are：C:0.009%, Si:
0.002%, Mn:0.055%, P:0.008%, S:0.010%, Al:0.004%, Ti:0.0025%, B:0.0077%, surplus for Fe and
Inevitable impurity.
This shielding line includes steel billet smelting, heating steel billet, wire rod rolling and wire rod bosher with the production method of steel wire rod
Sequence, each process technique are as follows：
（1）Steel billet smelting procedure：Include desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves successively.
（2）Heating steel billet process：Using continuous casting billet heating and hot rolling base reheating mode, furnace temp 1150
℃；The total time of continuous casting billet in heating furnace is 235min, oxygen content 4% in stove；The total time of hot rolling base in heating furnace is
120min, oxygen content 2% in stove.
（3）Wire rod rolling process：970 DEG C of final rolling temperature, 965 DEG C of laying temperature.
（4）Wire rod cooling process：Using retarded cooling process, insulation cover Close All on stelmor roller-way, cooling blower is complete
Portion closes, roller table speed 0.40m/s.
This shielding line is good with steel wire rod drawing property, can be drawn to 0.08mm not fracture of wires, conductivity 16.5%, tension
Intensity 258MPa, elongation 53%, reduction of area 83%.
This shielding line is with the line and staff control that the microscopic structure of steel wire rod is ferrite and cementite, wherein ferrite grain size
5 grades.
Claims (9)
1. a kind of copper clad steel composite shielding cable steel wire rod, which is characterized in that the steel wire rod chemical composition and its quality percentage
Content be C≤0.010%, Si≤0.010%, Mn≤0.07%, P≤0.010%, S≤0.010%, Al≤0.004%, Ti≤
0.003%, B:0.0060~0.0120%, surplus is Fe and inevitable impurity.
2. copper clad steel composite shielding cable steel wire rod according to claim 1, which is characterized in that the steel wire rod it is micro-
Tissue is made of ferrite and cementite, wherein ferrite grain size≤6 grade.
3. copper clad steel composite shielding cable steel wire rod according to claim 1 or 2, which is characterized in that the steel wire rod
Specification be 5.5~7.0mm of Φ, conductivity >=16.3%, tensile strength≤290MPa, elongation >=50%, reduction of area >=80%.
4. a kind of production method of copper clad steel composite shielding cable steel wire rod described in based on claim 1-3 any one,
It is characterized in that, the production method includes steel billet smelting, heating steel billet, wire rod rolling and wire rod cooling process；
The steel billet chemical composition and its mass percentage are C≤0.010%, Si≤0.010%, Mn≤0.07%, P≤
0.010%, S≤0.010%, Al≤0.004%, Ti≤0.003%, B:0.0060~0.0120%, surplus is for Fe and inevitably
Impurity；
For the heating process using continuous casting billet heating and hot rolling base reheating mode, furnace temp is 1150 ± 10 DEG C；
The wire rod cooling process uses retarded cooling process.
5. the production method of copper clad steel composite shielding cable steel wire rod according to claim 4, it is characterised in that：The steel
Base smelting procedure includes successively：Desulfurizing iron processing, top and bottom combined blown converter smelting, the refining of LF stoves, the refining of RH stoves.
6. the production method of copper clad steel composite shielding cable steel wire rod according to claim 5, it is characterised in that：It is described to add
Thermal technology's sequence, the total time of continuous casting billet in heating furnace are 180~240min, oxygen content≤6% in stove.
7. the production method of copper clad steel composite shielding cable steel wire rod according to claim 6, it is characterised in that：It is described to add
Thermal technology's sequence, the total time of hot rolling base in heating furnace are 90~120min, oxygen content≤6% in stove.
8. the production method of the copper clad steel composite shielding cable steel wire rod according to claim 4-7 any one, feature
It is：The wire rod rolling process, 980 ± 10 DEG C of final rolling temperature, 970 ± 10 DEG C of laying temperature.
9. the production method of the copper clad steel composite shielding cable steel wire rod according to claim 4-7 any one, feature
It is：The retarded cooling process is insulation cover Close All on stelmor roller-way, cooling blower Close All, and roller table speed is
0.2~0.4m/s.
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| CN113857254A (en) * | 2021-09-16 | 2021-12-31 | 湖南华菱湘潭钢铁有限公司 | Production method of ultra-low carbon steel wire rod for copper-clad steel wire |
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