CN105648322B - Inexpensive ultra-deep rushes level cold-rolling galvanization steel band and preparation method thereof - Google Patents
Inexpensive ultra-deep rushes level cold-rolling galvanization steel band and preparation method thereof Download PDFInfo
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- CN105648322B CN105648322B CN201610145962.5A CN201610145962A CN105648322B CN 105648322 B CN105648322 B CN 105648322B CN 201610145962 A CN201610145962 A CN 201610145962A CN 105648322 B CN105648322 B CN 105648322B
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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
-
- 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
-
- 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
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
Abstract
The invention discloses a kind of inexpensive ultra-deep to rush level cold-rolling galvanization steel band and preparation method thereof, and the weight/mass percentage composition of the steel band chemical composition is：C 0.001~0.005%, Mn 0.07~0.12%, S≤0.012%, P≤0.012%, Si≤0.03%, Als 0.010~0.060%, N≤0.0040%, B 0.0015~0.0030%, remaining is being mingled with Fe and allowed band.This galvanized steel strip to reduce the content of the free carbon in steel as far as possible, while by adding a certain amount of boron, comes fixed interval (FI) Nitrogen Atom and partial carbon, can so ensure that ultra-deep rushes the ageing of level galvanizing production by controlling rational carbon content.This galvanized steel strip fixes carbon atom using boron, substantially reduces alloy material cost, while can substantially reduce the heating-up temperature of zinc-plated process, soaking temperature, so as to significantly reduce production difficulty and energy consumption.
Description
Technical field
The present invention relates to a kind of galvanized steel strip, especially a kind of inexpensive ultra-deep rushes level cold-rolling galvanization steel band and its preparation side
Method.
Background technology
With the progress of steel and iron industry, household electrical appliances and other machinery manufacturing industry are also developed rapidly, as people are to production
Product formability and it is corrosion proof require more and more higher, the dosage that ultra-deep rushes level galvanizing production is increasing.Especially it is in
Electricity, automobile and other industries.Because household electrical appliances, automobile are limited by haul distance and its process-cycle, it is necessary to assure gap-free atom in steel,
So as to ensure the ageing and formability of steel.
It is by adding a certain amount of niobium or titanium into steel that current most ultra-deep, which rushes level galvanizing production, or niobium titanium is compound
To fix the interstitial atom in steel such as carbon, nitrogen etc..So because niobium or titanium cost are very high, can so ultra-deep be caused to rush galvanizing production
Cost of material will be substantially at 120~150 yuan/ton（Each steel-making level is different to cause cost variant）.Niobium titanium is except solid
It is exactly crystal grain thinning to also have important effect outside fixed gap atom, while raises recrystallization temperature；This will result in follow-up plating
Strip heating-up temperature and soaking temperature in zinc process are typically at 820 DEG C or so, even more high；Temperature height causes to produce ultra-deep punching
The energy consumption of level galvanizing production is just high, if rhythm of production goes out some problems and its easily causes high temperature broken belt, causes production difficulty
It is very high.
Can so make production ultra-deep rush level galvanizing production overall cost it is very big, production difficulty is also very big, makes in the market
Ultra-deep rush the price of level galvanizing production and be far above general commercial level galvanizing production.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of inexpensive ultra-deep to rush level cold-rolling galvanization steel band；The present invention also carries
A kind of inexpensive ultra-deep of low energy consumption has been supplied to rush the preparation method of level cold-rolling galvanization steel band.
In order to solve the above technical problems, the weight/mass percentage composition of steel band chemical composition of the present invention is：C 0.001~
0.005%, Mn 0.07~0.12%, S≤0.012%, P≤0.012%, Si≤0.03%, Als 0.010~0.060%, N≤
0.0040%, B 0.0015~0.0030%, remaining is being mingled with Fe and allowed band.
Thickness of strips of the present invention is 0.4~2.5mm.
The inventive method includes hot rolling, cold rolling and zinc-plated process, the zinc-plated process：The heating-up temperature of strip be 640~
740 DEG C, soaking temperature is 640~740 DEG C.
In zinc-plated process of the present invention, strip is cooled to 460~490 DEG C and enters zinc pot.
Hot-rolled process of the present invention：1100~1200 DEG C of the heating-up temperature of steel billet, 1~2 hour is incubated, finishing temperature exists
890~910 DEG C；Refrigerating mode is cooled down using leading portion, 700~730 DEG C of coiling temperature.
Cold rolling process of the present invention：Cold-rolled compression ratio is 60%~85%.
In zinc-plated process of the present invention, line speed is 80~100m/min, and the breaking elongation of finishing straightening is
0.65%~1.2%.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is by controlling rational carbon content, to use up
Amount reduces the content of the free carbon in steel, while by adding a certain amount of boron, comes fixed interval (FI) Nitrogen Atom and partial carbon, this
Sample can ensure that ultra-deep rushes the ageing of level galvanizing production.The present invention fixes carbon atom using boron, substantially reduces alloy material cost,
It can substantially reduce the heating-up temperature of zinc-plated process and soaking temperature simultaneously, so as to significantly reduce production difficulty and energy consumption.
The heating of zinc-plated process in the inventive method, soaking temperature substantially reduce, and the heating of strip, soaking temperature are less than
The heating of general mill run, soaking temperature, substantially reduce the consumption of the energy, simultaneously because temperature reduces, reduce high temperature and break
The risk of band, the processing cost and processing risk for making zinc-plated process are preferably minimized.Therefore, the inventive method have low energy consumption,
The features such as cost space is big, production difficulty is low and Product processing is functional.
The inventive method by effectively control carbon content in steel, Boron contents and coordinate rational hot rolling technology, cold rolling and
Zincincation, ensure that product has very high punching performance, production cost is compared with adding the cost of niobium, titanium to substantially reduce, and substantially ton steel drops
Low 50 yuan or so.The present invention coordinates rational chemical composition and hot rolling technology zinc-plated annealing temperature is greatly reduced, and reduces
Production risk, at the same it is energy-saving, it can so greatly enhance the competitiveness of product in market, considerable economy is created for enterprise
Benefit.The inventive method ensures the grain size of hot rolling raw produce to be further ensured that heat by higher hot-rolling coiling temperature
The performance rolled, while structural homogenity is good, can so ensure that the cost of alloy of hot rolling raw material substantially reduces.The inventive method
The ultra-deep produced rushes the performance of level galvanizing production and surface is equal to conventional ultra-deep and rushes level galvanizing production.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0018%, Mn 0.12%, S 0.007%, P 0.012%, Si 0.01%,
Als 0.046%, N 0.0035%, B 0.0020%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）Time 2 h, 900 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 720 DEG C of coiling temperature.Hot Rolling Strip specification is 2.75 × 1020mm, and performance is：Tensile strength
293MPa, yield strength 192MPa, elongation percentage 49.5%.
Cold rolling process：Cold rolling thickness is 0.5 × 1000mm, compression ratio 81.8%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 707 DEG C, the soaking temperature 707 of strip
℃；Strip enters 465 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 0.7%；Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 169MPa, tensile strength 297MPa, A80 44.0%, n
Value 0.23, R values 2.05.
Embodiment 2：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0010%, Mn 0.10%, S 0.007%, P 0.011%, Si 0.01%,
Als 0.048%, N 0.0022%, B 0.0023%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）Time 2 h, 900 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 717 DEG C of coiling temperature.Hot Rolling Strip specification is 3.0 × 1020mm, and performance is：Tensile strength 304MPa,
Yield strength 221MPa, elongation percentage 42.5%.
Cold rolling process：Cold rolling thickness is 0.6 × 1000mm, compression ratio 80%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 720 DEG C, the soaking temperature 720 of strip
℃；Strip enters 465 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 0.8%；Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 158MPa, tensile strength 292MPa, A80 42.5%, n
Value 0.20, R values 2.2.
Embodiment 3：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0020%, Mn 0.10%, S 0.007%, P 0.011%, Si 0.01%,
Als 0.044%, N 0.0027%, B 0.0022%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）Time 2 h, 900 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 720 DEG C of coiling temperature.Hot Rolling Strip specification is 4.0 × 1020mm, and performance is：Tensile strength 293MPa,
Yield strength 192MPa, elongation percentage 49.5%.
Cold rolling process：Cold rolling thickness is 1.2 × 1000mm, compression ratio 80%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 680 DEG C, the soaking temperature 680 of strip
℃；Strip enters 460 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 0.85%；Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 174MPa, tensile strength 297MPa, A80 42.0%, n
Value 0.20, R values 2.05.
Embodiment 4：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0020%, Mn 0.10%, S 0.008%, P 0.010%, Si 0.01%,
Als 0.045%, N 0.0021%, B 0.0021%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）Time 2 h, 900 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 720 DEG C of coiling temperature.Hot Rolling Strip specification is 5 × 1020mm, and performance is：Tensile strength 302MPa, bend
Take intensity 231MPa, elongation percentage 41.0%.
Cold rolling process：Cold rolling thickness is 1.5 × 1000mm, compression ratio 70%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 660 DEG C, the soaking temperature 660 of strip
℃；Strip enters 465 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 1.0%；Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 186MPa, tensile strength 295MPa, A80 41.0%, n
Value 0.22, R values 2.0.
Embodiment 5：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0020%, Mn 0.09%, S 0.006%, P 0.011%, Si 0.01%,
Als 0.048%, N 0.0025%, B 0.0022%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）1 hour time, 890 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 720 DEG C of coiling temperature.Hot Rolling Strip specification is 6.0 × 1020mm, and performance is：Tensile strength 290MPa,
Yield strength 207MPa, elongation percentage 44.0%.
Cold rolling process：Cold rolling thickness is 1.8 × 1000mm, compression ratio 70%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 640 DEG C, the soaking temperature 660 of strip
℃；Strip enters 465 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 1.2%；Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 195MPa, tensile strength 303MPa, A80 41.0%, n
Value 0.22, R values 2.15.
Embodiment 6：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0030%, Mn 0.07%, S 0.007%, P 0.008%, Si 0.01%,
Als 0.034%, N 0.0030%, B 0.0023%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1100 DEG C of slab heating temperature, soaking（Insulation）Time 2 h, 900 DEG C of finishing temperature, cooling is adopted
Cooled down with leading portion, 730 DEG C of coiling temperature.Hot Rolling Strip specification is 6.25 × 1020mm, and performance is：Tensile strength
313MPa, yield strength 234MPa, elongation percentage 43.5%.
Cold rolling process：Cold rolling thickness is 2.5 × 1000mm, compression ratio 60%.
Zinc-plated process：Line speed is 80m/min, and the heating-up temperature of strip is 740 DEG C, the soaking temperature 740 of strip
℃；Strip enters 470 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 1.2%.Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 178MPa, tensile strength 299MPa, A80 40.0%, n
Value 0.23, R values 2.05.
Embodiment 7：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0050%, Mn 0.08%, S 0.012%, P 0.008%, Si 0.02%,
Als 0.010%, N 0.0040%, B 0.0015%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1200 DEG C of slab heating temperature, soaking（Insulation）1.5 hours time, 910 DEG C of finishing temperature, cooling
Cooled down using leading portion, 710 DEG C of coiling temperature.Hot Rolling Strip specification is 2.7 × 1020mm, and performance is：Tensile strength
320MPa, yield strength 237MPa, elongation percentage 46.5%.
Cold rolling process：Cold rolling thickness is 0.4 × 1000mm, compression ratio 85.0%.
Zinc-plated process：Line speed is 100m/min, and the heating-up temperature of strip is 700 DEG C, the soaking temperature 700 of strip
℃；Strip enters 480 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 0.65%.Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 185MPa, tensile strength 297MPa, A80 40.85%,
N values 0.21, R values 2.1.
Embodiment 8：The preparation method that this inexpensive ultra-deep rushes level cold-rolling galvanization steel band uses following concrete technologies.
Strand（Steel billet）Chemical composition（wt）：C 0.0040%, Mn 0.11%, S 0.009%, P 0.008%, Si 0.03%,
Als 0.060%, N 0.0032%, B 0.0030%, remaining is being mingled with Fe and allowed band.
Hot-rolled process：1150 DEG C of slab heating temperature, soaking（Insulation）1.5 hours time, 900 DEG C of finishing temperature, cooling
Cooled down using leading portion, 700 DEG C of coiling temperature.Hot Rolling Strip specification is 2.0 × 1020mm, and performance is：Tensile strength
318MPa, yield strength 227MPa, elongation percentage 47.0%.
Cold rolling process：Cold rolling thickness is 0.6 × 1000mm, compression ratio 70.0%.
Zinc-plated process：Line speed is 90m/min, and the heating-up temperature of strip is 640 DEG C, the soaking temperature 640 of strip
℃；Strip enters 490 DEG C of zinc pot temperature；The breaking elongation of finishing straightening is 0.65%.Other parameters and the operation of common galvanizing production
Parameter is identical.The performance of this cold-rolling galvanization strip product is：Yield strength 182MPa, tensile strength 301MPa, A80 41.5%, n
Value 0.22, R values 2.15.
Claims (4)
1. a kind of inexpensive ultra-deep rushes the preparation method of level cold-rolling galvanization steel band, it includes hot rolling, cold rolling and zinc-plated process, described
The weight/mass percentage composition of steel band chemical composition is：C 0.0018~0.005%, Mn 0.07~0.12%, S≤0.012%, P≤
0.012%, Si≤0.03%, Als 0.010~0.060%, N≤0.0040%, B 0.0015~0.0030%, remaining is Fe and permitted
Being mingled with the range of perhaps, it is characterised in that the zinc-plated process：The heating-up temperature of strip is 640~740 DEG C, and soaking temperature is
640~740 DEG C, strip is cooled to 460~490 DEG C and enters zinc pot.
2. inexpensive ultra-deep according to claim 1 rushes the preparation method of level cold-rolling galvanization steel band, it is characterised in that described
Hot-rolled process：1100~1200 DEG C of the heating-up temperature of steel billet, 1~2 hour is incubated, finishing temperature is at 890~910 DEG C；Cool down mould
Formula is cooled down using leading portion, 700~730 DEG C of coiling temperature.
3. inexpensive ultra-deep according to claim 1 or 2 rushes the preparation method of level cold-rolling galvanization steel band, it is characterised in that
The cold rolling process：Cold-rolled compression ratio is 60%~85%.
4. inexpensive ultra-deep according to claim 1 or 2 rushes the preparation method of level cold-rolling galvanization steel band, it is characterised in that：
The thickness of strips is 0.4~2.5mm.
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| CN102912227A (en) * | 2012-10-23 | 2013-02-06 | 鞍钢股份有限公司 | Soft tinning raw steel plate and manufacture method thereof |
| CN103627957A (en) * | 2013-10-14 | 2014-03-12 | 首钢总公司 | Steel for CR4 hot dip galvanized automobile sheets and production method thereof |
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Effective date of registration: 20190530 Address after: 063000 Tangshan Modern Equipment Manufacturing Industrial Zone, Kaiping District, Tangshan City, Hebei Province Co-patentee after: Tangshan Iron and Steel Group Co., Ltd. Patentee after: Tangshan Iron and Steel Group High Strength Automobile Plate Co., Ltd. Co-patentee after: River steel Limited by Share Ltd Tangshan branch Address before: No. 9, Riverside Road, North District of Tangshan City Road, Hebei Province, Hebei Patentee before: Tangshan Iron and Steel Group Co., Ltd. |