CN106086348A - A kind of cold rolling bailing band of high-strength high-elongation ratio and manufacture method thereof - Google Patents
A kind of cold rolling bailing band of high-strength high-elongation ratio and manufacture method thereof Download PDFInfo
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- CN106086348A CN106086348A CN201610597776.5A CN201610597776A CN106086348A CN 106086348 A CN106086348 A CN 106086348A CN 201610597776 A CN201610597776 A CN 201610597776A CN 106086348 A CN106086348 A CN 106086348A
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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
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
A kind of cold rolling bailing band of high-strength high-elongation ratio and manufacture method thereof, described steel band chemical composition and mass fraction thereof be: C:0.20～0.23%, Mn:1.50～1.80%, Si≤0.15%, S≤0.015%, P≤0.025%, Al >=0.035%, N≤0.0050%, surplus is ferrum and inevitable impurity.Manufacture method include converter smelting, LF stove refine, continuous casting, strand heating, hot rolling, section cooling, batch, pickling, cold rolling and annealing are turned blue operation, described hot rolling operation includes roughing, finish rolling.This method is not added with the expensive alloying elements such as Nb, Ti, V, significantly reduces production cost；Certain Fe content, solution strengthening ferrite matrix, it is ensured that the intensity of steel and do not reduce its toughness；Use hot rolling cooling controlling and rolling controlling process, turn blue technique in conjunction with follow-up cold rolled hardened technique, process annealing, it is ensured that the existing higher intensity (tensile strength >=980MPa) of final products has again good processing characteristics (elongation percentage A30 >=12%).
Description
Technical field
The invention belongs to steel and manufacture processing method technical field, be specifically related to a kind of cold rolling packing of high-strength high-elongation ratio
Steel band and manufacture method thereof.
Background technology
Bailing band is that the cold-rolled strip by certain material annealed turns blue, the working procedure processing such as longitudinal shearing slitting is fabricated by
Packing material, owing to it belongs to recoverable environmental protection type material, the premium properties such as the best obdurability, corrosion resistance, can be wide
General it is applied to the industries such as iron and steel, aluminium, chemical fibre, cotton spinning, Nicotiana tabacum L., paper industry, metal tank.
Along with the progressively quickening of economic internationalization process, China's bailing band industry experienced by the stage of high speed development,
Become ingredient important in made in China field.It is as follows that bailing band development highlights trend:
1) the obdurability demand of bailing band improves constantly.Bailing band can be divided into low-intensity steel band, middle intensity by tensile strength
Steel band, high-strength steel strip, current packaging market requires the fastness of packaging, requires to improve constantly to bailing band obdurability, general
All over requiring tensile strength >=930MPa, and the steel band of tensile strength >=980MPa belongs to high-strength steel strip, due to its tensile strength
Optimum, and product has certain toughness, not an easy fracture, thus be advantageously employed in bulk supply tariff gather around bag.
2) production cost requirement of bailing band constantly reduces.Common carbon manganese steel through cooling controlling and rolling controlling process produce high-strength
Product progressively instead of the high cost strap raw material adding the expensive alloying elements such as Nb, Ti, V, and strapping band product line
Point bar quantity is also developed into bro ad hot strip by ribbon steel mark bar and divides ten several or even tens finished products.
3) production technology, product requirement environmental protection.Heating technique is developed into instantaneous sense by original lead bath heating technique
Should heat the technique that air cooling turns blue, production process requires nontoxic pollution-free.
Owing to demand is big, China's package steel strip industry is mass, and the development of scale meets the needs of development.
But also result in competition and the price war of homogeneity simultaneously.Therefore, the personalization of market trend and user's application is complied with
Demand, manufacture high-strength tenacity, low cost, the bailing band of environmental protection become development trend.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cold rolling bailing band of high-strength high-elongation ratio and manufacturer thereof
Method, this high-strength cold rolling bailing band toughness is strong, and its manufacture method has that production cost is low, efficiency is high, properties of product are excellent, technique
Simply, the feature of green safety environmental protection.
For solving above-mentioned technical problem, the technical solution used in the present invention is: described steel band chemical composition and quality thereof
Mark is: C:0.20～0.23%, Mn:1.50～1.80%, Si≤0.15%, S≤0.015%, P≤0.025%, Al >=0.035%,
N≤0.0050%, surplus is ferrum and inevitable impurity.
The present invention passes through C-Si-Mn solution strengthening, and its principle is: C, Si, Mn atom incorporated in solid solution causes lattice
Distortion, distortion of lattice increases the resistance of dislocation motion, makes sliding be difficult to, so that the intensity of Alloy solid solution and hardness
Increase.Wherein Si-Mn solution strengthening belongs to displacement solid solution, and it is to increase intensity and hardness relative to the advantage of gap solid solution
Meanwhile, toughness and plasticity decline inconspicuous.Use and have the beneficial effects that produced by technique scheme: the present invention passes through C-
The composition design of Si-Mn solution strengthening, is not added with the expensive alloying elements such as Nb, Ti, V, significantly reduces production cost.
The present invention also aims to provide the manufacture method of the cold rolling bailing band of a kind of high-strength high-elongation ratio, including turning
Stove smelting, LF stove refine, continuous casting, strand heating, hot rolling, section cooling, batch, pickling, cold rolling and annealing are turned blue operation,
Described hot rolling operation includes roughing, finish rolling.
Hot rolling operation of the present invention: roughing extreme trace time temperature 1020-1120 DEG C, final rolling temperature 1040-1070 DEG C,
Between finishing stand, cooling is opened, finishing temperature 850～880 DEG C；Section cooling operation: section cooling uses leading portion to concentrate cooling mould
Formula；Coiling process: coiling temperature 570～590 DEG C.
Cold rolling process of the present invention: use singlestandmill back and forth to roll, rolls total reduction 50-75%, rolling
Passage 5-7 passage.
Annealing of the present invention is turned blue operation: use electromagnetic induction heating, instantaneous holding temperature 500～600 DEG C of being warming up to,
Temperature retention time 8～15s, air cooling cools down, completes process of turning blue in cooling procedure；Bar is divided to cut into the packing steel of 20-40mm width
Band 10-20 bar.
In converter smelting operation of the present invention, require with addition of alloy according to target component.
LF stove refining procedure of the present invention, it is ensured that quiet blow the time more than 8 minutes.
In continuous casting working procedure of the present invention, casting process uses omnidistance argon for protecting pouring, emptying before pouring into a mould this steel grade
Middle cinder inclusion, and rejoin middle covering agent, to ensure that coverture has an ability that absorption is mingled with, molten steel overheat 20-30 DEG C,
Stablize pulling rate 1.5-2.0m/min.
Strand heating process of the present invention: heating-up temperature 1100～1200 DEG C, in the situation ensureing strand rolling temperature
Under, reduce time inside furnace, time inside furnace desired value: hot charging 80-140min as far as possible；Cold charge 120-200min.
Pickling process of the present invention: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 70-90
DEG C, pickling speed 90-120m/min.
The concrete technology of the present invention is as follows:
1) steel-making step: this step mainly obtains the pure molten steel of steel and slab.Use 150 tons of top and bottom combined blown converter smeltings,
LF stove refine, continuous casting.
Converter smelting, LF stove refining procedure, will improve Molten Steel Cleanliness as far as possible: alloy converter with addition of, LF only does small
Adjust, and reduce charging times as far as possible, strive for accomplishing once with addition of putting in place.LF guarantee is quiet blew the time more than 8 minutes.Casting process
Use omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and rejoin middle covering agent, to ensure to cover
Agent has the ability that absorption is mingled with, molten steel overheat 20-30 DEG C, stablizes pulling rate 1.5-2.0m/min.
2) hot-rolled step: include strand heating, roughing, finish rolling, section cooling, batch.Employing roller hearth type heating furnace is carried out
Strand heating, roughing use a frame back and forth to roll, finish rolling uses seven frame tandem mill group rollings, section cooling to use leading portion collection
Middle refrigerating mode.
Strand heating process: heating-up temperature 1100～1200 DEG C, in the case of ensureing strand rolling temperature, reduces as far as possible
Time inside furnace, time inside furnace desired value: 80-140min(hot charging)；120-200min(cold charge).Roughing extreme trace time temperature 1020-
1120 DEG C, final rolling temperature 1040-1070 DEG C, between finishing stand, cooling is opened, finishing temperature 850～880 DEG C, layer chill formula requirement
Leading portion concentrates cooling, coiling temperature 570～590 DEG C.
3) cold rolling step: include pickling, cold rolling process.
Continuous turbulence acid dip line is used to carry out quick pickling processing, acid liquor temperature 70-90 DEG C, pickling speed 90-120m/
min；Cold rolling step uses singlestandmill back and forth to roll, and rolls total reduction 50-75%, rolling pass 5-7 passage.
4) annealing is turned blue step: includes anneal, turn blue, divide bar, coil into dish operation.
Using electromagnetic induction heating, instantaneous holding temperature 500～600 DEG C of being warming up to, temperature retention time 8～15s, air cooling is cold
But；Cooling procedure completes process of turning blue；Divide bar to cut into the bailing band 10-20 bar of 20-40mm width, coil into dish and obtain
The cold rolling bailing band of high-strength high-elongation ratio.
Use having the beneficial effects that of technique scheme generation: 1, the inventive method uses C-Si-Mn solution strengthening
Composition designs, and is not added with the expensive alloying elements such as Nb, Ti, V, significantly reduces production cost, certain Fe content, solution strengthening
Ferrite matrix, it is ensured that the intensity of steel and do not reduce its toughness；2, the degree of purity of molten steel, hot rolling controlled rolling control are controlled by steel-making
Technique cold, cold rolled hardened, process annealing are turned blue technique, it is ensured that the excellent toughness and tenacity of final products；3, hot rolling control is used
Roll the cold technique of control, turn blue technique in conjunction with follow-up cold rolled hardened technique, process annealing, it is ensured that final products are existing higher strong
Degree (tensile strength >=980MPa), has again good processing characteristics (elongation percentage A30 >=12%)；Use electromagnetic induction heating pattern
Instead of traditional lead bath heating, safety and environmental protection；4, use wide flat steel to divide the pattern of bar 10-20 bar to compare more traditional arrowband to divide
The pattern that bar is less than 10, improves production efficiency, reduces cost.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further detailed explanation, and the performance detection in following embodiment is adopted
With longitudinal test piece, gauge length is 30mm.
Embodiment 1
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.21%,
Mn:1.70%, Si:0.12%, S:0.007%, P:0.0:15%, Al:0.035%, N:0.0050%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 10 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 25 DEG C, stablize pulling rate 1.6m/min.
4) strand heating: heating-up temperature 1150 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: hot charging 90min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1070 DEG C, final rolling temperature
1055 DEG C, between finishing stand, cooling is opened, finishing temperature 860 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 580 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 75 DEG C, pickling speed 110m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 71%, rolling pass 5 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 550 DEG C, temperature retention time 10s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 20 of 30mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 3.1mm, cold rolled sheet thickness
Specification 0.9mm；End properties: tensile strength is 1022MPa, elongation percentage A30mm is 13%.
Embodiment 2
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.20%,
Mn:1.80%, Si:0.15%, S:0.005%, P:0.012%, Al:0.040%, N:0.0040%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 9 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 26 DEG C, stablize pulling rate 1.7m/min.
4) strand heating: heating-up temperature 1155 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: hot charging 80min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1080 DEG C, final rolling temperature
1058 DEG C, between finishing stand, cooling is opened, finishing temperature 865 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 585 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 76 DEG C, pickling speed 105m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 73.3%, rolling pass 7 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 555 DEG C, temperature retention time 11s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 16 of 38mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 3.0mm, cold rolled sheet thickness
Specification 0.8mm；End properties: tensile strength is 1040MPa, elongation percentage A30mm is 12%..
Embodiment 3
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.23%,
Mn:1.50%, Si:0.13%, S:0.015%, P:0.014%, Al:0.045%, N:0.0045%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 10.5 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 21 DEG C, stablize pulling rate 1.8m/min.
4) strand heating: heating-up temperature 1160 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: cold charge 130min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1075 DEG C, final rolling temperature
1060 DEG C, between finishing stand, cooling is opened, finishing temperature 870 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 590 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 80 DEG C, pickling speed 120m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 74%, rolling pass 7 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 570 DEG C, temperature retention time 12s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 18 of 30mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 3.5mm, cold rolled sheet thickness
Specification 0.91mm；End properties: tensile strength is 1035MPa, elongation percentage A30mm is 13.5%.
Embodiment 4
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.21%,
Mn:1.65%, Si:0.10%, S:0.009%, P:0.025%, Al:0.040%, N:0.0050%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 10 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 28 DEG C, stablize pulling rate 1.65m/min.
4) strand heating: heating-up temperature 1160 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: hot charging 95min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1070 DEG C, final rolling temperature
1050 DEG C, between finishing stand, cooling is opened, finishing temperature 860 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 585 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 70 DEG C, pickling speed 90m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 68%, rolling pass 5 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 600 DEG C, temperature retention time 15s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 20 of 32mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 2.5mm, cold rolled sheet thickness
Specification 0.8mm；End properties: tensile strength is 1030MPa, elongation percentage A30mm is 14%.
Embodiment 5
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.21%,
Mn:1.70%, Si:0.11%, S:0.010%, P:0.020%, Al:0.035%, N:0.0045%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 11 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 30 DEG C, stablize pulling rate 1.5m/min.
4) strand heating: heating-up temperature 1155 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: hot charging 140min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1020 DEG C, final rolling temperature
1040 DEG C, between finishing stand, cooling is opened, finishing temperature 850 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 570 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 70 DEG C, pickling speed 105m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 72.6%, rolling pass 5 passage.
10) annealing is turned blue: use electromagnetic induction heating, the instantaneous holding temperature 580 DEG C that is warming up to, temperature retention time 10.5s, sky
Cold but, cooling procedure completes process of turning blue；Bar is divided to cut into the bailing band 18 of 35mm width.
Embodiment 6
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.21%,
Mn:1.75%, Si:0.10%, S:0.012%, P:0.018%, Al:0.044%, N:0.0041%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 11 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 20 DEG C, stablize pulling rate 1.55m/min.
4) strand heating: heating-up temperature 1100 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: cold charge 200min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1120 DEG C, final rolling temperature
1070 DEG C, between finishing stand, cooling is opened, finishing temperature 880 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 590 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 90 DEG C, pickling speed 120m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 50%, rolling pass 5 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 580 DEG C, temperature retention time 8s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 20 of 20mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 2.5mm, cold rolled sheet thickness
Specification 0.8mm；End properties: tensile strength is 1037MPa, elongation percentage A30mm is 14.5%.
Embodiment 7
The chemical composition of the cold rolling bailing band of high-strength high-elongation ratio and mass fraction thereof that the present embodiment produces be: C:0.23%,
Mn:1.60%, Si:0.13%, S:0.008%, P:0.018%, Al:0.049%, N:0.0037%, remaining is that ferrum is with inevitable
Impurity.
Its manufacture method is carried out according to following technique:
1) converter smelting: according to target component with addition of alloy.
2) LF stove refine: LF stove refine is quiet blows the time 11 minutes.
3) continuous casting: casting process uses omnidistance argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and again add
Enter middle covering agent, to ensure that coverture has the ability that absorption is mingled with, molten steel overheat 25 DEG C, stablize pulling rate 2.0m/min.
4) strand heating: heating-up temperature 1200 DEG C, in the case of ensureing strand rolling temperature, reduces when stove as far as possible
Between, time inside furnace desired value: cold charge 120min.
5) hot rolling: hot rolling operation includes roughing, finish rolling；Roughing extreme trace time temperature 1075 DEG C, final rolling temperature
1060 DEG C, between finishing stand, cooling is opened, finishing temperature 865 DEG C.
6) section cooling: section cooling uses leading portion to concentrate refrigerating mode.
7) batch: coiling temperature 580 DEG C.
8) pickling: use continuous turbulence acid dip line to carry out quick pickling processing, acid liquor temperature 73 DEG C, pickling speed 90m/
min。
9) cold rolling: to use singlestandmill back and forth to roll, roll total reduction 75%, rolling pass 7 passage.
10) annealing is turned blue: uses electromagnetic induction heating, instantaneous is warming up to holding temperature 500 DEG C, temperature retention time 14s, air cooling
Cooling, completes process of turning blue in cooling procedure；Bar is divided to cut into the bailing band 10 of 40mm width.
High-strength high-elongation ratio cold rolling bailing band thickness specification: hot rolling plate thickness specification 3.1mm, cold rolled sheet thickness
Specification 0.85mm；End properties: tensile strength is 1040MPa, elongation percentage A30mm is 13%.
Above example is only in order to illustrative not limiting technical scheme, although with reference to above-described embodiment to this
Bright be described in detail, it will be understood by those within the art that: still the present invention can be modified or etc.
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should contain the power in the present invention
In the middle of profit claimed range.
Claims (10)
1. the cold rolling bailing band of high-strength high-elongation ratio, it is characterised in that described steel band chemical composition and mass fraction thereof
For: C:0.20～0.23%, Mn:1.50～1.80%, Si≤0.15%, S≤0.015%, P≤0.025%, Al >=0.035%, N≤
0.0050%, surplus is ferrum and inevitable impurity.
2. manufacture method based on the cold rolling bailing band of a kind of high-strength high-elongation ratio described in claim 1, it is characterised in that
Including converter smelting, LF stove refine, continuous casting, strand heating, hot rolling, section cooling, batch, pickling, cold rolling and annealing send out
Blue operation, described hot rolling operation includes roughing, finish rolling.
Manufacture method the most according to claim 2, it is characterised in that described hot rolling operation: roughing extreme trace time temperature
1020-1120 DEG C, final rolling temperature 1040-1070 DEG C, between finishing stand, cooling is opened, finishing temperature 850～880 DEG C；Laminar flow is cold
But operation: section cooling uses leading portion to concentrate refrigerating mode；Coiling process: coiling temperature 570～590 DEG C.
Manufacture method the most according to claim 2, it is characterised in that described cold rolling process: use singlestandmill to carry out
Reciprocal rolling, rolls total reduction 50-75%, rolling pass 5-7 passage.
Manufacture method the most according to claim 2, it is characterised in that described annealing is turned blue operation: use electromagnetic induction to add
Heat, instantaneous holding temperature 500～600 DEG C of being warming up to, temperature retention time 8～15s, air cooling cools down, completes place of turning blue in cooling procedure
Reason；Bar is divided to cut into the bailing band 10-20 bar of 20-40mm width.
6. according to the manufacture method described in claim 2-5 any one, it is characterised in that in described converter smelting operation, root
Require with addition of alloy according to target component.
7. according to the manufacture method described in claim 2-5 any one, it is characterised in that described LF stove refining procedure, it is ensured that
Quiet blow the time more than 8 minutes.
8. according to the manufacture method described in claim 2-5 any one, it is characterised in that in described continuous casting working procedure, continuous casting mistake
Cheng Caiyong whole process argon for protecting pouring, cinder inclusion in emptying before pouring into a mould this steel grade, and rejoin middle covering agent, to ensure to cover
Lid agent has the ability that absorption is mingled with, molten steel overheat 20-30 DEG C, stablizes pulling rate 1.5-2.0m/min.
9. according to the manufacture method described in claim 2-5 any one, it is characterised in that described strand heating process: heating
Temperature 1100～1200 DEG C, in the case of ensureing strand rolling temperature, reduce time inside furnace, time inside furnace desired value as far as possible:
Hot charging 80-140min；Cold charge 120-200min.
10. according to the manufacture method described in claim 2-5 any one, it is characterised in that described pickling process: use continuously
Turbulence acid dip line carries out quick pickling processing, acid liquor temperature 70-90 DEG C, pickling speed 90-120m/min.
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| CN108359851A (en) * | 2018-02-05 | 2018-08-03 | 奥科宁克（昆山）铝业有限公司 | A kind of strap and the manufacturing process for producing the strap |
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| CN113025887A (en) * | 2021-02-07 | 2021-06-25 | 首钢集团有限公司 | DH980 steel with high edge quality and preparation method thereof |
| CN113621887A (en) * | 2021-07-23 | 2021-11-09 | 山东钢铁集团日照有限公司 | Production method of low-cost cold-rolled steel strip raw material for packing belt |
| CN113621887B (en) * | 2021-07-23 | 2022-06-10 | 山东钢铁集团日照有限公司 | Production method of low-cost cold-rolled steel strip raw material for packing belt |
| CN114411062A (en) * | 2022-01-21 | 2022-04-29 | 吉林建龙钢铁有限责任公司 | Steel for high-strength packing belt and preparation method thereof |
| CN115323139A (en) * | 2022-07-14 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Preparation method of ferrite strip steel and ferrite strip steel |
| CN115323139B (en) * | 2022-07-14 | 2023-11-14 | 首钢京唐钢铁联合有限责任公司 | Preparation method of ferrite band steel and ferrite band steel |
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Application publication date: 20161109 |