CN109321842A - A kind of batteries of electric automobile clean steel band and preparation method thereof - Google Patents
A kind of batteries of electric automobile clean steel band and preparation method thereof Download PDFInfo
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- CN109321842A CN109321842A CN201811295127.5A CN201811295127A CN109321842A CN 109321842 A CN109321842 A CN 109321842A CN 201811295127 A CN201811295127 A CN 201811295127A CN 109321842 A CN109321842 A CN 109321842A
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- 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
- C21D8/0273—Final recrystallisation annealing
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to a kind of batteries of electric automobile clean steel bands and preparation method thereof, by weight percentage, it is composed of the following components: C:0.010~0.028%, Si≤0.015%, Mn:0.15~0.25%, Als:0.01~0.03%, P≤0.003%, S≤0.003%, N≤0.002%, remaining is iron and inevitable impurity.Preparation method includes: molten iron pretreatment, converter smelting, LF+RH refining, slab continuous casting, hot rolling, batches, pickling, cold rolling, bell-type annealing, smooth, finishing, product volume inspection delivery.The present invention is adjusted ingredient and preparation process, successfully solves high cleanliness, the high-yield strength, the contradictory problems of high surface hardness and good deep drawability of battery steel band on the traditional smelting equipment and pair rolling production line of no molten iron " three is de- " function.
Description
Technical field
The invention belongs to batteries of electric automobile material field, in particular to a kind of batteries of electric automobile clean steel band and its
Preparation method.
Background technique
Currently, it is Air Pollution prevention and control, opens up the application market of motor transport service new cleaning fuel, global range is just lifted
The vigorous new technology revolution tide that conventional fuel oil automobile is replaced with electric car is played.Core as electric car
The development of center portion part, battery material is most important.
By taking domestic certain type electric car newly developed as an example, lithium dynamical battery mould group is multiple groups cylindrical battery series connection group
It closes, this battery is made of four big materials such as sheathing material, electrode material, diaphragm and electrolyte (liquid), wherein outside battery
Shell must be made of a kind of high-quality steel shell, it uses the steel band of 0.5mm thickness, form through multi-pass high speed, continuous punching, and want
High pressure in energy electrical resistance method is sought, prevents from leading to explosive failure because of internal electrolyte abnormal chemical reactions.Therefore, to steel band used
Intensity (yield strength >=200MPa, tensile strength >=300MPa), surface hardness (HVBe 110 ± 10), it is material degree of purity, microcosmic
(two-sided " O5 " surface quality checks under 50 times of magnifying glasses microcosmic without any pin hole, sand holes etc. for tissue, dimensional accuracy, surface quality
Defect) and the composite request of deep drawing formability (elongation percentage >=44%) it is very harsh, this steel band is a kind of to be still at home
Metal material in exploitation is relied primarily at present from Japanese import.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of batteries of electric automobile clean steel band and preparation method thereof,
On the traditional smelting equipment and pair rolling production line of no molten iron " three is de- " function, it is adjusted ingredient and preparation process, at
Function solves the lance of the high cleanliness of battery steel band, great surface quality, high-yield strength, high surface hardness and good deep drawability
Shield problem.
A kind of batteries of electric automobile clean steel band of the invention, by weight percentage, composed of the following components: C:
0.010~0.028%, Si≤0.015%, Mn:0.15~0.25%, Als:0.01~0.03%, P≤0.003%, S≤
0.003%, N≤0.002%, remaining is iron and inevitable impurity.
The present invention can obviously increase carbide spacing in steel by control C≤0.028% in this way, be conducive to reduce finished product
Cementite rank in steel band promotes deep drawability to improve steel band Lankford r value.On the other hand, if C content mistake
Low, then the supersolubility temperature of C is low, and in such cold rolling post-batch-annealing cooling procedure, the solid solution capacity of C is significantly increased, and makes battery steel
The anti-room temperature ageing penalty of band；And C content is too low, then and band hardness of steel is too low；Therefore the present invention design C be 0.010~
0.028%.
The present invention presses the control thinking of clean steel, and P, S, N content in steel of keeping under strict control are both to guarantee finished product steel belt deep drawing quality
Can, even more for steel band degree of purity is substantially improved, inhibit field trash to generate, and " O5 " surface quality for meeting battery case harshness is wanted
It asks.
A kind of preparation method of batteries of electric automobile clean steel band of the invention, comprising:
Molten iron pretreatment, converter smelting, LF+RH refining, slab continuous casting, hot rolling, batch, pickling, cold rolling, bell-type move back
Fiery, smooth, finishing, product volume examine delivery.
The present invention ties up to traditional smelting equipment and pair rolling production line of no molten iron " three is de- " and converter " duplex " function
The production development of the upper pure battery steel for realizing ultralow P, S.
The converter smelting uses high alkalinity clinker (CaO/SiO2: 4.0~5.5；A12O3>=30%)；Single slag process operation,
It is appropriate to reduce converter terminal temperature, control tapping molten steel P≤70ppm.
The LF refining uses economical Dephosphorising agent lime, sinter, and ensures that stirring is good so that slag steel is abundant in furnace
Reaction, for LF dephosphorization rate up to 80% or more, control tapping molten steel P is 5~20ppm.
In LF refining, using the aluminium powder pressure ball containing aluminium 40% as diffusion deoxidizer, compared with routine is with aluminium ash ball, take off
Sulphur efficiency greatly improves 10% or more, and total desulfurization degree > 70%, smelting endpoint S stability contorting is≤35ppm, and cost reduces about
1 yuan/ton；And slag system fusing point reduces by 100 DEG C or so, thus promote slag system mobile to low melting point section, preferably completion desulfurization, suction
Attached field trash effect.Again through RH refining treatment, finished product molten steel S control is≤30ppm (15~30ppm).
The de- C, the production stage for taking off O are mainly carried out in RH refining furnace, the RH refining specifically: elder generation's " deep decarburization " is extremely
C≤0.0025%, then carburetting controls whole oxygen amount≤0.0022%, to obviously inhibit in steel to 0.010~0.028% again
The generation that oxide etc. is mingled with.
When the slab continuous casting, within the scope of usual production 1.0~2.0m/min pulling rate used, the present invention is in control steel
Water level fluctuation is less than under the premise of ± 3mm, drawing speed is improved 15% than common process system regulations value, to make full use of liquid
State molten steel souring, inhibits the enrichment of the elements such as casting blank solidification interface C, N, O, H, thus inhibit fine pin hole in slab,
Air blister defect is formed.
It is a discovery of the invention that harmful field trash of size larger (>=80 μm) is primarily present in the surface layer slab 2mm in slab,
Slab of the present invention must carry out the processing that strips off the skin to upper and lower surfaces, and cleaning depth is controlled by 3mm.
The technological parameter of the hot rolling are as follows: 1220 DEG C ± 20 DEG C of tapping temperature, 900 DEG C ± 20 DEG C of finish rolling finishing temperature, volume
Take 550 DEG C ± 20 DEG C of temperature.Strict implement low-temperature coiling processes after finish rolling guarantee that AlN secondary phase is completely in solid solution shape in steel
State.
The cold rolling is rolled using reversing cold mill, and total reduction is controlled 85~88%, and such hot rolled coil thickness can
It designing by 3.5~4.0mm, hot rolled coil is easy to logical plate rolling at this time, and strip middle part, secondary edge, edge temperature are more uniform, because
This organizes difference without exception.
And usually low-carbon al-killed deep punching steel general control cold rolling total reduction is 65~75%, hot rolled coil with a thickness of
1.8~2.2mm, hot rolled coil rolling difficulty is big at this time, and strip middle part, secondary edge, edge temperature gradient are obvious, histological difference
Greatly.
The technological parameter of the bell-type annealing are as follows: by 60~80 DEG C/h heating, 680 ± 10 DEG C of heat preservations, soaking times 11
~13 hours, to guarantee that finished product steel belt grain size is tiny, general control was 8~9 grades, according to Hall-Patch formula, steel band
Yield strength can significantly improve；In addition, the solid solution of carbon coarse in steel, nitride has been postponed in the heating that is rapidly heated, it is conducive to
It is formed with the recrystallized structure conducive to deep-draw.According to the common annealing process of low-carbon al-killed deep punching steel, i.e. heating (20 at a slow speed
~50 DEG C/h), high annealing (710 ± 10 DEG C of holding temperature), extend soaking time (13~15 hours) etc., then obtain coarse cake
Shape crystal grain (6~7 grades of grain size), the yield strength of steel band is substantially reduced (mostly 160~180MPa or less), is not able to satisfy battery
The index request of steel band high intensity.
The smooth reduction ratio is 1.5~2.2%, sufficiently to promote the surface hardness and yield strength of steel band.Usually
Low-carbon al-killed deep punching steel then use 0.9~1.2% smooth reduction ratio, the purpose is to eliminate Low-carbon deep drawing steel surrender flat
It under the premise of platform, reduces steel band yield strength (being such as down to 170MPa or less), but is not suitable with battery case high surface hardness and is bent with height
Take the requirement of intensity.
Beneficial effect
(1) present invention is in no molten iron " three is de- " and traditional smelting equipment and pair rolling production line of converter " duplex " function
On, it is adjusted ingredient and preparation process, successfully solves high cleanliness, high-yield strength, the high surface hardness of battery steel band
With the contradictory problems of good deep drawability；
(2) steel band prepared by the present invention is used for punching battery case, and molded component dimensional accuracy is high, two-sided to reach the surface " O5 "
Quality checks under 50 times of magnifying glasses without the macroscopic view such as any pin hole, sand holes, corrugation, burr, bulge or microdefect；For substituting
Japanese import steel band makes finished battery, electroplated Ni, welds, fills electrolyte, assembly, surveys a variety of detections, test analysis such as pressure,
Every physical and chemical index is excellent；For assembling batteries of electric automobile mould group, as a result prove that its service performance is excellent.
Detailed description of the invention
Fig. 1 is the pictorial diagram of steel band of the present invention；
Fig. 2 is the pictorial diagram of the batteries of electric automobile shell of steel band punching of the present invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
It is by weight percentage, composed of the following components the present embodiment provides a kind of batteries of electric automobile clean steel band: C:
0.026%, Si:0.009%, Mn:0.24%, Als:0.021%, P:0.009%, S:0.0015%, N:0.0018%, remaining
For iron and inevitable impurity.
Preparation method includes:
Molten iron pretreatment, converter smelting using 4.7 basicity clinkers, LF+RH refining, slab continuous casting, hot rolling, batch, pickling,
Cold rolling, bell-type annealing, smooth, finishing, product volume examine delivery.
The converter smelting uses high alkalinity clinker；Single slag process operation, it is appropriate to reduce converter terminal temperature, control tapping steel
Water P≤70ppm.
The LF refining uses economical Dephosphorising agent lime, sinter, and ensures that stirring is good so that slag steel is abundant in furnace
Reaction, for LF dephosphorization rate up to 80% or more, control tapping molten steel P is 5~20ppm.In LF refining, using the aluminium powder pressure containing aluminium 40%
Ball is as diffusion deoxidizer, and compared with routine aluminium ash ball, desulfuration efficiency greatly improves 10% or more, total desulfurization degree >
70%, smelting endpoint S stability contorting is≤35ppm.Again through RH refining treatment, finished product molten steel S control is 15~30ppm.
The RH refining specifically: first " deep decarburization " processing takes off C to 0.0020%, and then carburetting is controlled to 0.026% again
Total oxygen processed is 0.0021%.
When the slab continuous casting, control liquid level fluctuation of molten steel is less than under the premise of ± 3mm, by drawing speed than common process system
Metric definite value improves 15%, carries out the processing that strips off the skin to upper and lower surfaces, cleaning depth is controlled by 3mm.
The technological parameter of the hot rolling are as follows: 1220 DEG C of tapping temperature, 900 DEG C of finish rolling finishing temperature, 560 DEG C of coiling temperature.
The cold rolling is rolled using reversing cold mill, and total reduction is controlled 88%.
The technological parameter of the bell-type annealing are as follows: kept the temperature by 65 DEG C/h heating, 690 DEG C, soaking time is 12 hours.
The smooth reduction ratio is 2.0%.
By the thickness specification of strip needed for batteries of electric automobile shell, 0.5mm battery steel band object performance is manufactured experimently out are as follows:
Vickers hardness HV=120, yield strength 230MPa, tensile strength 330MPa, elongation percentage 47%；Tissue is ferrite
+ minute quantity cementite, grain size are 8.5~9 grades, 1.0 grades of cementite rank <.
Prepared steel band is two-sided to reach " O5 " surface quality for substituting Japanese import steel band punching battery case, and 50 times
It is checked under magnifying glass without the macroscopic view such as any pin hole, sand holes, corrugation, burr, bulge or microdefect；Molded component dimensional accuracy
Height, electroplated Ni, weld, fill electrolyte, assembly, survey pressure etc. a variety of detections, test analysis, every physical and chemical index it is excellent；For
Batteries of electric automobile mould group is assembled, service performance is excellent.
Embodiment 2
It is by weight percentage, composed of the following components the present embodiment provides a kind of batteries of electric automobile clean steel band: C:
0.020%, Si:0.010%, Mn:0.20%, Als:0.028%, P:0.0016%, S:0.0020%, N:0.0016%,
Yu Weitie and inevitable impurity.
Preparation method includes:
Molten iron pretreatment, converter smelting using 4.4 basicity clinkers, LF+RH refining, hot rolling, batch, pickling, cold rolling,
Bell-type annealing, smooth, finishing, product volume examine delivery.
The converter smelting uses high alkalinity clinker；Single slag process operation, it is appropriate to reduce converter terminal temperature, control tapping steel
Water P≤70ppm.
The LF refining uses economical Dephosphorising agent lime, sinter, and ensures that stirring is good so that slag steel is abundant in furnace
Reaction, for LF dephosphorization rate up to 80% or more, control tapping molten steel P is 5~20ppm.In LF refining, using the aluminium powder pressure containing aluminium 40%
Ball is as diffusion deoxidizer, and compared with routine aluminium ash ball, desulfuration efficiency greatly improves 10% or more, total desulfurization degree >
70%, smelting endpoint S stability contorting is≤35ppm.Again through RH refining treatment, finished product molten steel S control is 15~30ppm.
The RH refining specifically: first " deep decarburization " processing takes off C to 0.0020%, and then carburetting is controlled to 0.020% again
Whole oxygen amount processed is 0.0022%.
When the slab continuous casting, control liquid level fluctuation of molten steel is less than under the premise of ± 3mm, by drawing speed than common process system
Metric definite value improves 15%, carries out the processing that strips off the skin to upper and lower surfaces, cleaning depth is controlled by 3mm.
The technological parameter of the hot rolling reeling are as follows: 1200 DEG C of tapping temperature, 895 DEG C of finish rolling finishing temperature, coiling temperature 550
℃。
The cold rolling is rolled using reversing cold mill, and total reduction is controlled 86%.
The technological parameter of the bell-type annealing are as follows: kept the temperature by 70 DEG C/h heating, 680 DEG C, soaking time is 13 hours.
The smooth reduction ratio is 1.5%.
By the thickness specification of strip needed for batteries of electric automobile shell, 0.5mm battery steel band object performance is manufactured experimently out are as follows:
Vickers hardness HV=112, yield strength 220MPa, tensile strength 325MPa, elongation percentage 48.5%；Tissue is iron element
Body+minute quantity cementite, grain size are 8.0~8.5 grades, 1.0 grades of cementite rank <.
For prepared steel band for substituting Japanese import steel band punching battery case, dual sided quality reaches " O5 " surface quality,
It is checked under 50 times of magnifying glasses without the macroscopic view such as any pin hole, sand holes, corrugation, burr, bulge or microdefect；Molded component size essence
Degree is high, electroplated Ni, welds, fills that electrolyte, assembly, to survey a variety of detections, test analysis, every physical and chemical indexes such as pressure excellent；With
In assembly batteries of electric automobile mould group, service performance is excellent.
Comparative example
Comparative example of the present invention provides a kind of common micro- carbon al-killed deep drawing steel strap, by weight percentage, by following components group
At: C:0.010%, Si:0.012%, Mn:0.15%, Als:0.038%, P:0.016%, S:0.010%, N:0.0040%,
Remaining is iron and inevitable impurity.
Preparation method includes:
Molten iron pretreatment, converter smelting, RH refining, hot rolling, batch, pickling, cold rolling, bell-type annealing, smooth, finishing, at
Product volume examines delivery.
The RH refining is light processing, and taking off C to 0.0010% terminates.
The technological parameter of the hot rolling are as follows: 1220 DEG C of tapping temperature, 910 DEG C of finish rolling finishing temperature, 560 DEG C of coiling temperature.
The cold rolling is rolled using reversing cold mill, total reduction 70%.
The technological parameter of the bell-type annealing are as follows: kept the temperature by 35 DEG C/h heating, 710 DEG C, soaking time is 15 hours.
The smooth reduction ratio is 1.0%.
0.5mm finished product steel belt object performance are as follows:
Vickers hardness HV=94, yield strength 165MPa, tensile strength 290MPa, elongation percentage 42%；Tissue be ferrite+
A small amount of cementite, grain size are 6.5 grades, 2.0 grades of cementite rank.
Prepared steel band is unable to satisfy high cleanliness, great surface quality, high-yield strength, high surface hardness and good depth
The battery case of punching property, which makes, to be required.
Claims (10)
1. a kind of batteries of electric automobile clean steel band, it is characterised in that: by weight percentage, composed of the following components: C:
0.010~0.028%, Si≤0.015%, Mn:0.15~0.25%, Als:0.01~0.03%, P≤0.003%, S≤
0.003%, N≤0.002%, remaining is iron and inevitable impurity.
2. a kind of preparation method of batteries of electric automobile as described in claim 1 clean steel band, comprising:
Molten iron pretreatment, converter smelting, LF+RH refining, slab continuous casting, hot rolling, batch, pickling, cold rolling, bell-type annealing, it is smooth,
Finishing, product volume examine delivery.
3. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
Converter smelting uses CaO/SiO2: 4.0~5.5 high alkalinity clinker, control tapping molten steel P≤70ppm.
4. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
For dephosphorization rate up to 80% or more, control tapping molten steel P is 6~20ppm in LF refining furnace.
5. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
LF refining using the aluminium powder pressure ball containing aluminium 40% be used as diffusion deoxidizer, total desulfurization degree > 70%, smelting endpoint S control be≤
35ppm。
6. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
RH refining specifically: first " deep decarburization " to C≤0.0025%, then again carburetting to 0.010~0.028%, control whole oxygen amount≤
0.0022%；After RH refining treatment, finished product molten steel S control is≤30ppm.
7. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
Hot-rolled process parameter are as follows: 1220 DEG C ± 20 DEG C of tapping temperature, 900 DEG C ± 20 DEG C of finish rolling finishing temperature, 550 DEG C ± 20 of coiling temperature
℃。
8. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
Cold rolling is rolled using reversing cold mill, and total reduction is controlled 85~88%.
9. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: described
The technological parameter of bell-type annealing are as follows: kept the temperature by 60~80 DEG C/h heating, 680 ± 10 DEG C, soaking time is 11~13 hours.
10. a kind of preparation method of batteries of electric automobile clean steel band according to claim 2, it is characterised in that: institute
Stating smooth reduction ratio is 1.5~2.2%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541123A (en) * | 2019-09-05 | 2019-12-06 | 首钢集团有限公司 | cold-rolled strip steel for battery case and preparation method thereof |
| CN112725692A (en) * | 2020-12-17 | 2021-04-30 | 包头钢铁（集团）有限责任公司 | Preparation method of steel strip for nitriding treatment |
| CN116287946A (en) * | 2023-05-22 | 2023-06-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of steel belt for battery shell |
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| CN101914725A (en) * | 2010-09-02 | 2010-12-15 | 唐山国丰钢铁有限公司 | Low-carbon ultra-deep punching cold-rolling steel sheet and production method thereof |
| CN103194670A (en) * | 2013-03-26 | 2013-07-10 | 浙江龙盛薄板有限公司 | Steel strip for household electric appliance panel and production method thereof |
| CN106011633A (en) * | 2016-07-21 | 2016-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-rolled steel belt used for Q235-level anti-seismic structure and preparation method of hot-rolled steel belt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101914725A (en) * | 2010-09-02 | 2010-12-15 | 唐山国丰钢铁有限公司 | Low-carbon ultra-deep punching cold-rolling steel sheet and production method thereof |
| CN103194670A (en) * | 2013-03-26 | 2013-07-10 | 浙江龙盛薄板有限公司 | Steel strip for household electric appliance panel and production method thereof |
| CN106011633A (en) * | 2016-07-21 | 2016-10-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-rolled steel belt used for Q235-level anti-seismic structure and preparation method of hot-rolled steel belt |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541123A (en) * | 2019-09-05 | 2019-12-06 | 首钢集团有限公司 | cold-rolled strip steel for battery case and preparation method thereof |
| CN110541123B (en) * | 2019-09-05 | 2021-06-15 | 首钢集团有限公司 | Cold-rolled strip steel for battery case and preparation method thereof |
| CN112725692A (en) * | 2020-12-17 | 2021-04-30 | 包头钢铁（集团）有限责任公司 | Preparation method of steel strip for nitriding treatment |
| CN116287946A (en) * | 2023-05-22 | 2023-06-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of steel belt for battery shell |
| CN116287946B (en) * | 2023-05-22 | 2023-08-04 | 江苏省沙钢钢铁研究院有限公司 | Production method of steel belt for battery shell |
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