CN109136444A - Quickly, the new energy car battery shell steel and production method of punch process is thinned - Google Patents
Quickly, the new energy car battery shell steel and production method of punch process is thinned Download PDFInfo
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- CN109136444A CN109136444A CN201811005915.6A CN201811005915A CN109136444A CN 109136444 A CN109136444 A CN 109136444A CN 201811005915 A CN201811005915 A CN 201811005915A CN 109136444 A CN109136444 A CN 109136444A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 189
- 239000010959 steel Substances 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 171
- 230000008569 process Effects 0.000 title claims abstract description 134
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 55
- 238000000137 annealing Methods 0.000 claims abstract description 73
- 238000005097 cold rolling Methods 0.000 claims abstract description 46
- 238000009749 continuous casting Methods 0.000 claims abstract description 45
- 238000009628 steelmaking Methods 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 13
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 12
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 35
- 238000005266 casting Methods 0.000 claims description 31
- 238000007664 blowing Methods 0.000 claims description 24
- 229910052799 carbon Inorganic materials 0.000 claims description 21
- 238000003723 Smelting Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000009467 reduction Effects 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 238000005261 decarburization Methods 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000011572 manganese Substances 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000002791 soaking Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 238000005275 alloying Methods 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000005554 pickling Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims 1
- 238000004080 punching Methods 0.000 abstract description 16
- 238000012545 processing Methods 0.000 abstract description 12
- 239000000126 substance Substances 0.000 abstract description 12
- 239000010936 titanium Substances 0.000 description 20
- 239000000047 product Substances 0.000 description 18
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 7
- 230000003749 cleanliness Effects 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 238000013475 authorization Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000003359 percent control normalization Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/0025—Adding carbon material
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/02—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
- C22C38/04—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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a kind of new energy car battery shell steel and production method quick, that punch process is thinned, the battery case is formed with steel chemical composition and its mass percentage are as follows: C:0.0030~0.0060%, Mn:0.10~0.20%, Si≤0.03%, Als:0.050~0.090%, Ti:0.050~0.070%, P≤0.015%, S≤0.012%, N≤0.0040%, surplus are Fe and inevitable impurity；The production method includes steel-making, continuous casting, hot rolling, batches, cold rolling, continuous annealing, smooth process.Quick, the new energy car battery shell that punch process is thinned of the method for the present invention production are adapted to the processing request of fast ram and thinned punching press with steel, overcome the problem of low-carbon class battery case steel forming property difference, controlling of production process main points are clear, with preferable implementation, and lower production costs.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of new energy car battery quick, that punch process is thinned
Shell steel and production method.
Background technique
New-energy automobile is that a kind of comprehensive performance requires high high-end cold rolling steel grade with battery case with steel, it is desirable that steel band tool
There are high-cleanness, high, great surface quality, high-performance uniformity and excellent processing performance etc..With new-energy automobile lightweight and continue
Boat requires to gradually rise, it is desirable that battery case can adapt to that punching press requirement is thinned with steel, and guarantee to have after shaping enough strong
Degree, to avoid after battery filling liquid because not enough there is bulge defect in anti-pressure ability；It is additionally based on the requirement for improving production efficiency, and
With the progress for shaping equipment, it is desirable that battery case steel is adapted to the processing request of fast ram.
Authorization Notice No. is " Tagger steel strip for battery casing and its manufacturing method " of CN1174109C, using Ultra-low carbon Ti-
Nb-IF composition of steel system produces the very thin steel band for being mainly used in alkali formula dry cell, this steel grade needs to be added a variety of alloys, cost
It is higher, and finished product yield tensile ratio is generally≤0.5, although punching performance is protected, because yield strength is relatively low, if for producing
New energy car battery shell can surrender low generation bulge because of strip after battery filling liquid, not be available；Authorization Notice No. is
" the punching speed per minute >=150 corrosion-resistant battery case steel and preparation method " of 102286699B, which uses Ultra-low carbon
Nb-IF composition of steel system produces battery case steel, and annealing process uses bell-type annealing, is equally control low yield strength ratio to improve punching
Performance is pressed, therefore new energy car battery shell can not be applied to；Authorization Notice No. is the " planar isotropy of CN100560770C
Excellent battery case steel and its manufacturing method ", the patent produce battery case steel, C using carbon aluminium-killed steel component system
Mass percent :≤0.01~0.05%, annealing process is bell-type annealing, this component system has certain advantage in cost,
But because carbon content is higher, pressworkability is poor, is unable to satisfy requirement quick, that punching press is thinned；Authorization Notice No. is
A kind of " production method of deep-draw battery case steel " of ZL201610759731.3 provides another low-carbon component system battery
The production method of shell steel is not able to satisfy processing request quick, that punching press is thinned equally through manufacturer is on probation.
By carrying out ingredient design and processes optimizing research, overcomes the problems, such as that low-carbon class battery case steel forming property is poor, open
Hair, which adapts to fast ram and the battery case steel of thinned punch process requirement, will have preferable economic benefit and social benefit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of new energy car battery shell use quick, that punch process is thinned
Steel and production method.The invention is designed by reasonable ingredient, and by steel-making, refining, continuous casting, hot rolling, batch, cold rolling,
The techniques such as continuous annealing optimize, and cleanliness, performance of steel band etc. are guaranteed, and not only have relative commercialization ultralow
The higher intensity of carbon steel, and overcome the problem of low-carbon class battery case steel forming property difference, adapt to fast ram and punching is thinned
The processing request of pressure.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of new energy quick, that punch process is thinned
Source automobile batteries shell steel, the battery case is formed with steel chemical composition and its mass percentage are as follows: and C:0.0030~
0.0060%, Mn:0.10~0.20%, Si≤0.03%, Als:0.050~0.090%, Ti:0.050~0.070%, P≤
0.015%, S≤0.012%, N≤0.0040%, surplus are Fe and inevitable impurity.
180~210MPa of battery case steel yield strength of the present invention, 320~350MPa of tensile strength, elongation of having no progeny
Rate A50>=39%, elongation strain hardenability value n90>=0.22, plastic strain ratio r90>=1.5, plastic strain ratio degree of anisotropy Δ r
≤0.3；Battery case is the ferrite and carbide of partial annealing pattern with steel microscopic metallographic structure, 9~10 grades of grain size.
The present invention also provides one kind quickly, the production method of the new energy car battery shell steel of thinned punch process,
The production method includes steel-making, continuous casting, hot rolling, batches, cold rolling, continuous annealing, smooth process；The steel making working procedure, converter
1700~1730 DEG C of smelting endpoint temperature；The continuous casting working procedure takes permanent casting speed control, controls level fluctuation≤± 2mm；It is described
Hot-rolled process, 1220~1300 DEG C of soaking temperature, 885~915 DEG C of finish rolling finishing temperature；The continuous annealing process, annealing are equal
700~740 DEG C of hot temperature.
Steel making working procedure of the present invention, molten iron progress composite blowing lime and magnesium powder depth desulfurization process before smelting, molten iron S≤
0.003%；1700~1730 DEG C of converter smelting endpoint temperature, terminal oxygen 450~750ppm of position, molten steel composition: C:0.025~
0.045%,S≤0.011%,P≤0.013%；Converter molten steel is vacuum-treated through RH out, and RH application of vacuum process includes successively
Decarburization plus Al deep deoxidation, alloying, net circulation operation are carried out, deep decarburization time >=14min carries out heating by O2 blowing in carbon period,
Blowing oxygen quantity≤30Nm3, guarantee net circulation time >=8min, C content is removed to 0.0010~0.0015% in molten steel, then utilizes
Manganese iron, carburant etc., which match C content, adds to target component, and 1600~1615 DEG C of RH out-station temperature, the outbound molten steel composition of RH: C:
0.0028~0.0058%, Mn:0.10~0.20%, Als:0.052~0.091%, Ti:0.052~0.072%.
Continuous casting working procedure of the present invention, it is 15~25min, continuous casting production steel that RH vacuum breaker to continuous casting, which is opened and pours time of repose,
1557~1567 DEG C of coolant-temperature gage, continuous casting working procedure takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes perseverance
Casting speed control, control level fluctuation≤± 2mm avoid slag, 22~32 DEG C of the continuous casting production degree of superheat, 1.2~1.3m/ of pulling rate
Min after slab is offline, carries out removing surface using scafing or plate blank sharpening machine, clears up 2~3mm of depth, further remove
Large-sized inclusions etc. in steel.
Hot-rolled process of the present invention, slab are sent into heating furnace and are heated, and 1220~1300 DEG C of soaking temperature；It takes past
Compound roughing and 7 passage finish rolling control 885~915 DEG C of finish rolling finishing temperature.
Coiling process of the present invention, 640~680 DEG C of coiling temperature, layer is cold to use U-shaped cooling, is batching for 50 meters end to end
20 DEG C are improved on the basis of temperature, are further increased logical board group and are knitted performance uniformity.
Cold rolling process of the present invention carries out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling is tired
Counting reduction ratio is 83~85%.
Continuous annealing process of the present invention, is made annealing treatment in continuous annealing line, and control annealing soak temperature 700~
740 DEG C, 100~150m/min of annealing process speed.
Smooth process of the present invention carries out smooth, smooth pressure to steel band using planisher in continuous annealing line exit
Lower rate 1.2~2.0%, obtains finished product steel belt after smooth, carries out oiling packing to finished product steel belt, for use.
Design of Chemical Composition thinking of the present invention:
Carbon (C): being most common intensified element in steel, increase the intensity of steel, plasticity decline.To guarantee new-energy automobile electricity consumption
Pond shell with steel there is certain intensity to need to control C content to resist the internal pressure after battery filling liquid.Commercialization ultra-deep rushes purposes
General C content≤0.0030% of ultra-low-carbon steel, the present invention in control C content 0.0030~0.0060%, steel band can be properly increased
Intensity.For ultra-low-carbon steel, in the form of interstitial atom existing for carbon atom can be greatly reduced steel strip stamping forming property, therefore this
Invention has correspondingly also carried out targeted design to Ti content, guarantees that finished product steel belt is gap-free atom (IF) steel state.
Manganese (Mn): being a kind of steel intensified element, the intensity that a certain amount of manganese is conducive to improve steel band is added, while Mn can be with
MnS is generated in conjunction with S avoids sulphur in steel from causing the hot-short of steel.But manganese content is excessively high in ultra-low-carbon steel can be unfavorable to punch process,
Therefore control Mn content 0.10~0.20%.
Titanium (Ti): being fixed C, N atom using Ti in the present invention, steel band made to reach gap-free atom (IF) state, is guaranteed
Steel band has good forming property.Ti mainly exists in the form of the precipitated phases such as TiN, precipitates in ferrite, hinders crystal grain long
Greatly, can be to avoid coarse-grain phenomenon, and have certain effect to intensity is improved.C content has carried out special designing, Ti content in the present invention
The effect for guaranteeing to be completely fixed C, N is needed, furthermore excessively high Ti is harmful instead to ultra-low-carbon steel punching performance, therefore Ti content
It is accordingly designed, is controlled 0.050~0.070%.
Preferably, 1.1≤Ti/ (4C+3.428N+1.5S)≤1.5 is controlled, guarantees gap-free atom (IF) state, and
There are suitable effective Ti in steel, improve r value to a certain extent, guarantee forming property.
Aluminium (Al): steelmaking process carries out deoxidation using aluminium, removes the oxygen in smelting process in molten steel, the aluminium oxide folder of generation
Sundries is easily removed, and by rationally designing to aluminium content, guarantees the Cleanliness of Molten Steel size that simultaneously control oxide is mingled with.This
Outside, it will form dissolved aluminum Als after aluminium being added in steel, can be reacted with N and generate AlN, promote Iinterstitial Atom-Free, and tiny more
Scattered AlN precipitated phase can prevent Austenite Grain Growth, and refinement crystal grain promotes microstructure homogenization.But when Als is excessively high in steel, smelting
Refining and continuous casting casting process difficulty can greatly improve, and be unfavorable for steady production.Therefore, Als content control 0.050~0.090%.
Silicon (Si): being a kind of intensified element, but be affected to punching performance, according to≤0.03% control；Phosphorus (P) is same
With invigoration effect, but steel plate processing brittleness can be improved, endanger punching performance, need to be removed, according to≤0.015% control；
Sulphur (S) is harmful element for steel band, influences toughness, punching performance etc., needs to be removed, according to≤0.012% control；Nitrogen
(N) too high levels will lead to steel strip stamping performance and decline to a great extent, according to≤0.0040% control.It is relatively unessential in the present invention
Elements Si, P, S, N commercially produce level substantially according to conventional ultra-low-carbon steel and provide content control requirement, advantageously reduce production
Difficulty and cost.
Particularly, the spy of the new energy car battery shell steel chemical composition of a kind of quickly, thinned punch process of the present invention
Sign is: using the C content 0.0030~0.0060% slightly higher relative to ultra-low-carbon steel, high Ti content 0.050~0.070%, protects
1.1≤Ti/ (4C+3.428N+1.5S)≤1.5, the design of high Als content 0.050~0.090% are demonstrate,proved, the strong of Ultra-low carbon strip is improved
Degree, and guarantee gap-free atom (IF) steel state and forming property with higher.
Production method critical control point of the present invention and control principle are as follows:
1. steel-making and continuous casting process:
1) based on the considerations of improving cleanliness and production efficiency, steel-making region mainly uses converter, RH application of vacuum and strand
Journey, therefore the guarantee of process temperature balance is stable for production extremely important with cleanliness.Control converter terminal higher temperature
1700~1730 DEG C, basis is provided for process temperature；Temperature losses of the process is reduced using turnover ladle and to ladle stamp；For 100t
Capacity RH application of vacuum device, it is desirable that heating oxygen consuming amount≤30Nm3, avoid generating a large amount of aluminates, and pass through guarantor
Net circulation time >=8min is demonstrate,proved, the broken sky of RH is opened to continuous casting pours 15~25min of time of repose, promotes inclusion floating to improve molten steel
Cleanliness, and avoid large-sized inclusions；By temperatures above control measure, the Metal in Tundish degree of superheat realizes 22~32 DEG C,
It particularly can control at 27~32 DEG C, the high degree of superheat is conducive to field trash and further floats.It, can be with by process above measure
Guarantee that 100t pneumatic steelmaking flowchart process temperature is stablized, and the production of larger capacity bof process can be readily applied to.
2) continuous casting process keeps permanent casting speed control, and mould liquid level fluctuation≤± 2mm prevents slag phenomenon substantially；Continuous casting
Removing surface is carried out using scafing or plate blank sharpening machine after base is offline, depth is 2~3mm, is further ensured that surface quality.
2. hot rolling technology:
1) bar plate heating stove soaking temperature control 1220~1300 DEG C, higher heating temperature may advantageously facilitate slab ingredient into
One step homogenization, and basis is provided for rolling temperature control.
2) finish rolling finishing temperature control is at 885~915 DEG C, it is ensured that finishing stands strip is in austenite one phase area and rolls
System, mixed crystal phenomenon caused by avoiding two-phase section from rolling promote structure property uniformity to be promoted.
3) 640~680 DEG C of coiling temperature are taken using lower warm rolling, and effective fining ferrite grains and precipitate size have
Conducive to the intensity for improving strip, avoid product intensity relatively low.
Cold rolling and continuous annealing process:
1) cold rolling control adds up biggish reduction ratio 83~85%, has more when biggish cold rolling reduction ratio can make strip anneal
More phase transformation nucleation points, and there is higher energy storage, be conducive to increase ferrite crystal grain quantity when annealing, thinning microstructure mentions
High uniformity.
2) 700~740 DEG C of continuous annealing soaking temperature carry out lower temperature partial annealing in two-phase section, avoid crystalline substance
Grain length is big, to improve matrix strength, and prolongs plasticity and formability with the quick thinned punch process of relatively good, satisfaction
Energy.
3) steel band after continuous annealing, planisher reduction ratio control 1.2~2.0%, utilizes higher smooth reduction ratio
The yield strength of Ultra-low carbon battery case is improved, and improves aging resistance energy.
Pass through the implementation of the above key process technology, it is ensured that the battery case of production with steel finished product have it is stable at
Point, higher cleanliness and surface quality, 180~210MPa of yield strength, 320~350MPa of tensile strength, elongation after fracture
A50>=39%, elongation strain hardenability value n90>=0.22, plastic strain ratio r90>=1.5, plastic strain ratio degree of anisotropy Δ r≤
0.3,9~10 grades of grain size, microscopic structure is the ferrite of fine uniform, and the satisfactions such as intensity and forming property are quick, punching is thinned
The requirement of the new energy car battery shell steel of processing is pressed, and can also be used for battery shell product, the metal of similar processing request
The production of tank class product etc..
The present invention is quick, the product standard of the new energy car battery shell steel of punch process is thinned refers to GB/T
34212—2017；Method for testing performance canonical reference GB/T228.1-2010, GB/T 5028-2008 and GB/T 5027-
2007。
The beneficial effects of adopting the technical scheme are that the 1, present invention is set by reasonable ingredient and technique
Meter, produces the Ultra-low carbon battery case with high cleanliness, great surface quality, high-performance uniformity and high formability energy
It is more suitable for the processing method of fast ram, thinned punching press, simultaneously relative to conventional low-carbon component system battery case steel with steel band
Compared to routine business ultra-low-carbon steel intensity with higher, bulge phenomenon after battery filling liquid can be prevented, new energy is fully met
The processing requirement of automobile batteries etc., it can also be used to the production of the battery shell product, metal can class product of similar processing request.
2, the main points of processes control of production method of the present invention is clear, has preferable implementation, and lower production costs.3, present invention side
New energy car battery the shell 180~210MPa of steel yield strength, tensile strength quick, that punch process is thinned of method production
320~350MPa, elongation after fracture A50>=39%, elongation strain hardenability value n90>=0.22, plastic strain ratio r90>=1.5, it moulds
Property strain than degree of anisotropy Δ r≤0.3,9~10 grades of grain size, the processing for being adapted to fast ram and thinned punching press is wanted
It asks, overcomes the problem of low-carbon class battery case steel forming property difference.
Detailed description of the invention
Fig. 1 is the lateral micro-organization chart of 1 steel band of embodiment；
Fig. 2 is longitudinal micro-organization chart of 1 steel band of embodiment；
Fig. 3 is the lateral micro-organization chart of 2 steel band of embodiment；
Fig. 4 is longitudinal micro-organization chart of 2 steel band of embodiment；
Fig. 5 is the lateral micro-organization chart of 3 steel band of embodiment；
Fig. 6 is longitudinal micro-organization chart of 3 steel band of embodiment；
Fig. 7 is the lateral micro-organization chart of 4 steel band of embodiment；
Fig. 8 is longitudinal micro-organization chart of 4 steel band of embodiment；
Fig. 9 is the lateral micro-organization chart of 5 steel band of embodiment；
Figure 10 is longitudinal micro-organization chart of 5 steel band of embodiment；
Figure 11 is the lateral micro-organization chart of 6 steel band of embodiment；
Figure 12 is longitudinal micro-organization chart of 6 steel band of embodiment.
Specific embodiment
Embodiment 1
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.003% before smelting；Converter
1700 DEG C of smelting endpoint temperature, terminal oxygen position 485ppm, molten steel composition: C:0.045%, S:0.005%, P:0.009%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 18min, carries out heating by O2 blowing, blowing oxygen quantity 30Nm in carbon period3, net circulation time 8min, C contains in molten steel
Amount is removed to 0.0010%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1600 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0058%, Mn:0.10%, Als:0.082%, Ti:0.072%；
(2) continuous casting working procedure: it is 15min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1557 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, and 22 DEG C of the continuous casting production degree of superheat, pulling rate 1.2m/min after slab is offline, are carried out using scafing
Casting billet surface cleaning, clears up depth 2mm；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1285 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 910 DEG C of finish rolling finishing temperature；
(4) coiling process: 680 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
83%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 720 DEG C of annealing soak temperature, annealing process speed
Spend 120m/min；
(7) smooth process: smooth, smooth reduction ratio 1.2% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Fig. 1 is battery
The lateral micro-organization chart of shell steel；Fig. 2 is longitudinal micro-organization chart of battery case steel.
Embodiment 2
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.002% before smelting；Converter
1703 DEG C of smelting endpoint temperature, terminal oxygen position 550ppm, molten steel composition: C:0.040%, S:0.007%, P:0.010%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 16min, carries out heating by O2 blowing, blowing oxygen quantity 20Nm in carbon period3, net circulation time 9min, C contains in molten steel
Amount is removed to 0.0015%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1605 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0051 %, Mn:0.13%, Als:0.091%, Ti:0.067%；
(2) continuous casting working procedure: it is 18min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1559 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, 24 DEG C of the continuous casting production degree of superheat, pulling rate 1.2m/min, after slab is offline, using plate blank sharpening machine into
The cleaning of row casting billet surface, clears up depth 3mm；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1220 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 885 DEG C of finish rolling finishing temperature；
(4) coiling process: 640 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
83%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 720 DEG C of annealing soak temperature, annealing process speed
Spend 130m/min；
(7) smooth process: smooth, smooth reduction ratio 1.5% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Fig. 3 is battery
The lateral micro-organization chart of shell steel；Fig. 4 is longitudinal micro-organization chart of battery case steel.
Embodiment 3
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.001% before smelting；Converter
1730 DEG C of smelting endpoint temperature, terminal oxygen position 750ppm, molten steel composition: C:0.035%, S:0.004%, P:0.013%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 15min, carries out heating by O2 blowing, blowing oxygen quantity 12Nm in carbon period3, net circulation time 8min, C contains in molten steel
Amount is removed to 0.0011%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1615 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0038%, Mn:0.18%, Als:0.052%, Ti:0.063%；
(2) continuous casting working procedure: it is 25min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1567 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, and 32 DEG C of the continuous casting production degree of superheat, pulling rate 1.3m/min after slab is offline, are carried out using scafing
Casting billet surface cleaning, clears up depth 3mm；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1265 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 905 DEG C of finish rolling finishing temperature；
(4) coiling process: 660 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
84%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 700 DEG C of annealing soak temperature, annealing process speed
Spend 100m/min；
(7) smooth process: smooth, smooth reduction ratio 2.0% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Fig. 5 is battery
The lateral micro-organization chart of shell steel；Fig. 6 is longitudinal micro-organization chart of battery case steel.
Embodiment 4
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.0015% before smelting；Converter
1725 DEG C of smelting endpoint temperature, terminal oxygen position 733ppm, molten steel composition: C:0.032%, S:0.006%, P:0.012%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 14min, carries out heating by O2 blowing, blowing oxygen quantity 20Nm in carbon period3, net circulation time 10min, C contains in molten steel
Amount is removed to 0.0012%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1612 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0028%, Mn:0.20%, Als:0.063%, Ti:0.052%；
(2) continuous casting working procedure: it is 20min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1563 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, 28 DEG C of the continuous casting production degree of superheat, pulling rate 1.3m/min, after slab is offline, using plate blank sharpening machine into
The cleaning of row casting billet surface, clears up depth 2mm；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1300 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 915 DEG C of finish rolling finishing temperature；
(4) coiling process: 670 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
85%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 740 DEG C of annealing soak temperature, annealing process speed
Spend 150m/min；
(7) smooth process: smooth, smooth reduction ratio 1.8% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Fig. 7 is battery
The lateral micro-organization chart of shell steel；Fig. 8 is longitudinal micro-organization chart of battery case steel.
Embodiment 5
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.0025% before smelting；Converter
1715 DEG C of smelting endpoint temperature, terminal oxygen position 600ppm, molten steel composition: C:0.038%, S:0.008%, P:0.011%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 15min, carries out heating by O2 blowing, blowing oxygen quantity 10Nm in carbon period3, net circulation time 9min, C contains in molten steel
Amount is removed to 0.0013%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1608 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0045%, Mn:0.16%, Als:0.078%, Ti:0.059%；
(2) continuous casting working procedure: it is 22min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1560 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, and 25 DEG C of the continuous casting production degree of superheat, pulling rate 1.2m/min after slab is offline, are carried out using scafing
Casting billet surface cleaning, clears up depth 2mm；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1240 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 895 DEG C of finish rolling finishing temperature；
(4) coiling process: 650 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
85%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 740 DEG C of annealing soak temperature, annealing process speed
Spend 140m/min；
(7) smooth process: smooth, smooth reduction ratio 1.8% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Fig. 9 is battery
The lateral micro-organization chart of shell steel；Figure 10 is longitudinal micro-organization chart of battery case steel.
Embodiment 6
The present embodiment is quickly, the chemical component of the new energy car battery shell steel of thinned punch process forms and its quality percentage
Content is shown in Table 1.
It includes steel-making that the present embodiment is quick, the production method of the new energy car battery shell steel of punch process is thinned, is connected
Casting hot rolling, is batched, cold rolling, continuous annealing, smooth process, and specific process step is as described below:
(1) steel making working procedure: molten iron carries out composite blowing lime and magnesium powder depth desulfurization process, molten iron S:0.0015% before smelting；Converter
1710 DEG C of smelting endpoint temperature, terminal oxygen position 450ppm, molten steel composition: C:0.025%, S:0.011%, P:0.011%；Converter out
Molten steel is vacuum-treated through RH, and RH application of vacuum process successively carries out the behaviour such as decarburization plus Al deep deoxidation, alloying, net circulation
Make, deep decarburization time 17min, carries out heating by O2 blowing, blowing oxygen quantity 15Nm in carbon period3, net circulation time 10min, C contains in molten steel
Amount is removed to 0.0014%, then matches C content using manganese iron, carburant etc. and adds to target component, and 1615 DEG C of RH out-station temperature,
The outbound molten steel composition of RH: C:0.0033%, Mn:0.12%, Als:0.058%, Ti:0.056%；
(2) continuous casting working procedure: it is 19min that RH vacuum breaker to continuous casting, which is opened and pours time of repose, 1562 DEG C of molten steel in bakie in continuous casting temperature, is connected
Foundry work sequence takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes permanent casting speed control, controls level fluctuation
≤ ± 2mm avoids slag, 27 DEG C of the continuous casting production degree of superheat, pulling rate 1.2m/min, after slab is offline, using plate blank sharpening machine into
Depth 2mm is cleared up in row removing surface；
(3) hot-rolled process: slab is sent into heating furnace and is heated, and 1270 DEG C of soaking temperature；Take reciprocating roughing and 7 passages essence
It rolls, controls 896 DEG C of finish rolling finishing temperature；
(4) coiling process: 660 DEG C of coiling temperature, layer is cold to use U-shaped cooling, improves 20 on the basis of coiling temperature for 50 meters end to end
℃；
(5) cold rolling process: carrying out conventional pickling to hot rolled strip before cold rolling, then carries out cold rolling, and cold rolling adds up reduction ratio and is
84%；
(6) continuous annealing process: being made annealing treatment in continuous annealing line, controls 710 DEG C of annealing soak temperature, annealing process speed
Spend 110m/min；
(7) smooth process: smooth, smooth reduction ratio 1.7% is carried out to steel band using planisher in continuous annealing line exit, is put down
Finished product steel belt is obtained after whole.
The present embodiment is quick, the performance of the new energy car battery shell steel of punch process is thinned is shown in Table 2；Figure 11 is battery
The lateral micro-organization chart of shell steel；Figure 12 is longitudinal micro-organization chart of battery case steel.
1 embodiment 1-6 battery case of table is formed with steel chemical composition and mass percentage (%)
In table 1, ingredient surplus is Fe and inevitable impurity.
2 embodiment 1-6 battery case Steel Properties of table
The new-energy automobile battery case steel of 1-6 of embodiment of the present invention production, through battery case processing, producer is used, process velocity
In the case where being improved by 30/min to 50~100/min, thinned punching press requirement can be fully met, battery case is improved
Production efficiency, and there is not the defects of sand holes, orange peel, scratch in battery-shell surface.Cold-rolled strip of the invention, which removes, is used for new energy
Automobile batteries shell production in source is outer, is also easy to promote and apply to the production of the products such as similar battery steel shell, metal can.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (10)
1. a kind of new energy car battery shell steel quick, that punch process is thinned, which is characterized in that the battery case tempering
It studies and is grouped as and its mass percentage are as follows: C:0.0030~0.0060%, Mn:0.10~0.20%, Si≤0.03%, Als:
0.050~0.090%, Ti:0.050~0.070%, P≤0.015%, S≤0.012%, N≤0.0040%, surplus are Fe and can not
The impurity avoided.
2. a kind of new energy car battery shell steel quick, that punch process is thinned according to claim 1, feature exist
In the battery case 180~210MPa of steel yield strength, 320~350MPa of tensile strength, elongation after fracture A50>=39%, it draws
Stretching strain hardenability value n90>=0.22, plastic strain ratio r90>=1.5, plastic strain ratio degree of anisotropy Δ r≤0.3；Battery case
It is the ferrite and carbide of partial annealing pattern with steel microscopic metallographic structure, 9~10 grades of grain size.
3. based on a kind of production of new energy car battery shell steel quick, that punch process is thinned of any of claims 1 or 2
Method, which is characterized in that the production method includes steel-making, continuous casting, hot rolling, batches, cold rolling, continuous annealing, smooth process；Institute
State steel making working procedure, 1700~1730 DEG C of converter smelting endpoint temperature；The continuous casting working procedure takes permanent casting speed control, controls liquid level
Fluctuation≤± 2mm；The hot-rolled process, 1220~1300 DEG C of soaking temperature, 885~915 DEG C of finish rolling finishing temperature；It is described continuous
Annealing operation, 700~740 DEG C of annealing soak temperature.
4. a kind of producer of new energy car battery shell steel quick, that punch process is thinned according to claim 3
Method, which is characterized in that the steel making working procedure, molten iron progress composite blowing lime and magnesium powder depth desulfurization process before smelting, molten iron S≤
0.003%；1700~1730 DEG C of converter smelting endpoint temperature, terminal oxygen 450~750ppm of position, molten steel composition: C:0.025~
0.045%,S≤0.011%,P≤0.013%；Converter molten steel is vacuum-treated through RH out, and RH application of vacuum process includes successively
Decarburization plus Al deep deoxidation, alloying, net circulation operation are carried out, deep decarburization time >=14min carries out heating by O2 blowing in carbon period,
Blowing oxygen quantity≤30Nm3, guarantee net circulation time >=8min, C content is removed to 0.0010~0.0015% in molten steel, then utilizes
Manganese iron, carburant etc., which match C content, adds to target component, and 1600~1615 DEG C of RH out-station temperature, the outbound molten steel composition of RH: C:
0.0028~0.0058%, Mn:0.10~0.20%, Als:0.052~0.091%, Ti:0.052~0.072%.
5. a kind of producer of new energy car battery shell steel quick, that punch process is thinned according to claim 3
Method, which is characterized in that the continuous casting working procedure, it is 15~25min, continuous casting production steel that RH vacuum breaker to continuous casting, which is opened and pours time of repose,
1557~1567 DEG C of coolant-temperature gage, continuous casting working procedure takes the measures such as argon gas-sealed, protective casting to prevent secondary oxidation of steel, takes perseverance
Casting speed control, control level fluctuation≤± 2mm avoid slag, 22~32 DEG C of the continuous casting production degree of superheat, 1.2~1.3m/ of pulling rate
Min after slab is offline, carries out removing surface using scafing or plate blank sharpening machine, clears up 2~3mm of depth.
6. new energy car battery shell quick according to one kind described in claim 3-5 any one, that punch process is thinned is used
The production method of steel, which is characterized in that the hot-rolled process, slab are sent into heating furnace and are heated, soaking temperature 1220~
1300℃；Reciprocating roughing and 7 passage finish rolling are taken, controls 885~915 DEG C of finish rolling finishing temperature.
7. new energy car battery shell quick according to one kind described in claim 3-5 any one, that punch process is thinned is used
The production method of steel, which is characterized in that the coiling process, 640~680 DEG C of coiling temperature, layer is cold to use U-shaped cooling, end to end
50 meters are improved 20 DEG C on the basis of coiling temperature.
8. new energy car battery shell quick according to one kind described in claim 3-5 any one, that punch process is thinned is used
The production method of steel, which is characterized in that the cold rolling process carries out conventional pickling to hot rolled strip before cold rolling, then carries out
Cold rolling, it is 83~85% that cold rolling, which adds up reduction ratio,.
9. new energy car battery shell quick according to one kind described in claim 3-5 any one, that punch process is thinned is used
The production method of steel, which is characterized in that the continuous annealing process is made annealing treatment in continuous annealing line, and control annealing is equal
700~740 DEG C of hot temperature, 100~150m/min of annealing process speed.
10. new energy car battery shell quick according to one kind described in claim 3-5 any one, that punch process is thinned is used
The production method of steel, which is characterized in that the smooth process using planisher carries out steel band flat in continuous annealing line exit
Whole, smooth reduction ratio 1.2~2.0% obtains finished product steel belt after smooth.
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| CN110016533A (en) * | 2019-03-13 | 2019-07-16 | 唐山钢铁集团有限责任公司 | The production technology of high-quality filter steel substrate |
| CN110257714A (en) * | 2019-07-22 | 2019-09-20 | 新疆八一钢铁股份有限公司 | A kind of electrode shell steel production technology of alloying component optimization |
| 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 |
| CN111349864A (en) * | 2020-03-12 | 2020-06-30 | 唐山钢铁集团有限责任公司 | High-strength high-plasticity annealed steel strip for pipe making and production method thereof |
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| CN110257714A (en) * | 2019-07-22 | 2019-09-20 | 新疆八一钢铁股份有限公司 | A kind of electrode shell steel production technology of alloying component optimization |
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| CN111363880A (en) * | 2020-02-17 | 2020-07-03 | 本钢板材股份有限公司 | Production method of IF steel for automobile outer plate without inclusion defect |
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| CN112481450A (en) * | 2020-11-10 | 2021-03-12 | 鞍钢股份有限公司 | Ultra-low inclusion cold-rolled thin strip for high-speed stamping and steelmaking optimization method thereof |
| CN112481450B (en) * | 2020-11-10 | 2022-05-13 | 鞍钢股份有限公司 | Ultra-low inclusion cold-rolled thin strip for high-speed stamping and steelmaking optimization method thereof |
| CN112899576A (en) * | 2021-01-15 | 2021-06-04 | 山东钢铁集团日照有限公司 | Cold-rolled steel plate for precision household electric welding pipe and production method thereof |
| CN115478208A (en) * | 2021-05-31 | 2022-12-16 | 宝山钢铁股份有限公司 | Thin-specification high-formability stamping steel based on CSP production line and preparation method thereof |
| CN115896593A (en) * | 2022-11-02 | 2023-04-04 | 河钢乐亭钢铁有限公司 | Control method for bubbling defect of low-carbon steel continuous casting slab |
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