CN106834914A - Deep-draw level Ti IF cold-rolled steel sheets and preparation method thereof - Google Patents
Deep-draw level Ti IF cold-rolled steel sheets and preparation method thereof Download PDFInfo
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- CN106834914A CN106834914A CN201611113757.7A CN201611113757A CN106834914A CN 106834914 A CN106834914 A CN 106834914A CN 201611113757 A CN201611113757 A CN 201611113757A CN 106834914 A CN106834914 A CN 106834914A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses a kind of deep-draw level Ti IF cold-rolled steel sheets, the weight/mass percentage composition of the chemical composition of material includes：C 0.001 0.003%, Si 0.004 0.006%, Mn 0.14 0.16, P≤0.010%, S≤0.006%, Ti 0.055 0.075%.The invention also discloses a kind of preparation method of deep-draw level Ti IF cold-rolled steel sheets.The steel band of the deep-draw level Ti IF cold-rolled steel sheets obtained using the present invention have low yield tensile ratio, good plasticity, plastic strain ratio it is high, with the good performance such as stamping, it is adaptable to the need for the complexity generation type such as Sheet Metal Forming Technology.
Description
Technical field
The present invention relates to a kind of IF steel production technology, specifically, it is related to a kind of deep-draw level Ti-IF cold-rolled steel sheets and its preparation
Method.
Background technology
IF is the abbreviation of Interstitial Free, therefore IF steel is also known as " gapless atomic steel ", between no in steel
C, N atom of gap solid solution are present, and the steel has excellent deep drawability and Non-ageing.The characteristics of IF steel is on composition is ultralow
Carbon, microalloying, substantially without C, N interstitial atom, steel is pure.By adding Nb or Ti microalloy elements in ultra-low-carbon steel,
Form carbon, nitride to separate out, reach the purpose of gap-free atom.Steel-making continuous casting operation molten steel Ultra-low carbon is required in the fabrication process
Treatment, sublimate treatment reduces the addition of microalloy element Nb or Ti, and smelting process is crucial.
Automobile deep drawing sheet steel (IF steel) complex manufacturing, influences the factor of its final performance various.Hot rolling technology system
Especially relatively tighter to finishing temperature, coiling temperature, cooling technique requirement in degree, high-temperature final rolling and high temperature coiling etc. are all conducive to carrying
The deep drawability of IF steel high.Steel plate can produce different degrees of processing to harden after cold rolling, cause and remnants are there are inside steel plate
Stress, so as to bring detrimental effect to plate property.
The content of the invention
Technical problem solved by the invention is to provide a kind of deep-draw level Ti-IF cold-rolled steel sheets, low, good with yield tensile ratio
Plasticity, plastic strain ratio be high, with the good performance such as stamping, it is adaptable to the need for the complexity generation type such as Sheet Metal Forming Technology.
Technical scheme is as follows：
A kind of deep-draw level Ti-IF cold-rolled steel sheets, the weight/mass percentage composition of the chemical composition of material includes：C 0.001-
0.003%, Si 0.004-0.006%, Mn 0.14-0.16, P≤0.010%, S≤0.006%, Ti 0.055-0.075%.
Technical problem solved by the invention is to provide a kind of preparation method of deep-draw level Ti-IF cold-rolled steel sheets, obtains
The steel band of deep-draw level Ti-IF cold-rolled steel sheets have low yield tensile ratio, good plasticity, plastic strain ratio it is high, with good stamping
Etc. performance, it is adaptable to the need for the complexity generation type such as Sheet Metal Forming Technology.
A kind of preparation method of deep-draw level Ti-IF cold-rolled steel sheets, including：
Rolling；Rolling includes roughing and finish rolling, and roughing uses 2 machine frame rolling mill roughing, finish rolling to use 7 frame continuously variable crowns
Milling train finish rolling；1050 ± 15 DEG C of the start rolling temperature of finish rolling, the finishing temperature of finish rolling is 900~920 DEG C；
Section cooling and batch, the temperature batched is 700~720 DEG C；
It is pickling, cold rolling；Enter descaling bath, 70~80 DEG C of pickling temperature, 120~150m/ of pickling speed after hot rolled coil uncoiling
Min, subsequently into 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 70~75%；
Annealing, it is smooth after obtain deep-draw level Ti-IF cold-rolled steel sheets；Annealing way uses bell-type annealing, the chemistry of material into
The weight/mass percentage composition for dividing includes：C 0.001-0.003%, Si 0.004-0.006%, Mn 0.14-0.16, P≤
0.010%, S≤0.006%, Ti 0.055-0.075%.
Further：Also include smelting, continuous casting；Smelting includes molten iron pretreatment, converter smelting, the refining of RH stoves；Steelmaking process
Control [O]≤20ppm, [N]≤30ppm.
Further：Also include heating of plate blank；Heating process is strict controlled in stove time, 1210 ± 15 DEG C of tapping temperature.
Further：Molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place is carried out at deep decarburization
Reason, target 20ppm after decarburization terminates, adds aluminum shot deoxidation, and add the alloys such as ferrotianium to be adjusted into according to oxygen situation is determined
Point, it is ensured that [the O]≤20ppm in molten steel；25 DEG C of the sheet billet continuous casting degree of superheat, casting process should use carbon-free middle covering agent, keep away
Exempt from carburetting in casting cycle；Slab heating temperature is 1210 DEG C, and the time of heating is 220min；1023 DEG C of finish rolling start rolling temperature,
Finish rolling finishing temperature is 900 DEG C；Coiling temperature is 700 DEG C, and the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is
75%, Cold Rolled Plate Thickness is 1.0mm；To ensure in annealing process for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen are pure
Degree.
Further：Molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place is carried out at deep decarburization
Reason, target 20ppm after decarburization terminates, adds aluminum shot deoxidation, and add the alloys such as ferrotianium to be adjusted into according to oxygen situation is determined
Point, it is ensured that [the O]≤20ppm in molten steel；25 DEG C of the sheet billet continuous casting degree of superheat, casting process should use carbon-free middle covering agent, keep away
Exempt from carburetting in casting cycle；Slab heating temperature is 1210 DEG C, and the time of heating is 210min；1020 DEG C of finish rolling start rolling temperature,
Finish rolling finishing temperature is 920 DEG C；Coiling temperature is 720 DEG C, and the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is
75%, Cold Rolled Plate Thickness is 1.0mm；To ensure in annealing process for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen are pure
Degree.
Further：Molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place is carried out at deep decarburization
Reason, target 20ppm after decarburization terminates, adds aluminum shot deoxidation, and add the alloys such as ferrotianium to be adjusted into according to oxygen situation is determined
Point, it is ensured that [the O]≤20ppm in molten steel；25 DEG C of the sheet billet continuous casting degree of superheat, casting process should use carbon-free middle covering agent, keep away
Exempt from carburetting in casting cycle；Slab heating temperature is 1210 DEG C, and the time of heating is 208min；1028 DEG C of finish rolling start rolling temperature,
Finish rolling finishing temperature is 910 DEG C；Coiling temperature is 720 DEG C, and the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is
75%, Cold Rolled Plate Thickness is 1.0mm；To ensure in annealing process for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen are pure
Degree.
Further：Chill volume enters bell type annealing furnace, 710 DEG C of annealing temperature, and soaking time is 10 hours, temperature retention time 6
Hour, smooth elongation percentage 1.2%.
Compared with prior art, the technology of the present invention effect includes：
1st, in the present invention, for yield tensile ratio is low the characteristics of the steel band mechanical property of deep-draw level Ti-IF cold-rolled steel sheets, good modeling
Property, plastic strain ratio is high, with good stamping formabilily, it is adaptable to the need for the complexity generation type such as Sheet Metal Forming Technology, mainly
For the manufacture of the automobile exterior panel and appliance plate of complicated stamping.
2nd, deep-draw level Ti-IF cold-rolled steel sheet yield strength distributions of the invention are between 140MPa~150MPa, and tension is strong
Degree is distributed between 282MPa~295MPa, and elongation percentage A80 is distributed between 40%~43%, yield tensile ratio YS/TS 0.48~
Between 0.52.
3rd, the deep-draw level Ti-IF cold-rolled steel huge market demands, high financial profit, more than about 200 yuan of ton steel benefit.
Brief description of the drawings
Fig. 1 is the metallographic structure figure of the embodiment of the present invention 1；
Fig. 2 is the metallographic structure figure of the embodiment of the present invention 2；
Fig. 3 is the metallographic structure figure of the embodiment of the present invention 3.
Specific embodiment
Technical solution of the present invention is elaborated below with reference to example embodiment.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to implementation method set forth herein；Conversely, thesing embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively conveyed to those skilled in the art by the present invention.
The present invention is high formability and needs the automobile board of good deep drawability and plasticity, is mainly used in that complexity can be met
The manufacture of the automobile exterior panel and appliance plate of stamping parts.Must be annealed after IF steel is cold rolling, annealing process is during IF steel cold-reduced sheet is produced
One critical process of final products performance is determined, the residual stress and internal flaw of steel plate can be not only eliminated, can be with
Complete ferritic recrystallization and crystal grain is grown up, develop recrystallization texture, have of crucial importance for the deep drawability of IF steel plates
Effect.After hot rolled plate is through subsequent cold rolling and annealing, knitting for strong { 111 } (110) annealing is shown as on texture composition
Structure, makes material have good deep drawability.
The preparation method of deep-draw level Ti-IF cold-rolled steel sheets, specifically includes following steps：
Step 1：Smelting, continuous casting section；
Molten iron pretreatment, converter smelting, the refining of RH stoves, casting machine continuous casting.Steelmaking process control [O]≤20ppm, [N]≤
30ppm, is C for casting machine molten steel composition：0.001-0.003%, Si：0.004-0.006%, Mn：0.14-0.16, P：≤
0.010%, S≤0.006%, Ti：0.055-0.075%.
Step 2：Heating of plate blank；
Heating process is strict controlled in stove time, 1210 ± 15 DEG C of tapping temperature.
Step 3：Rolling；
Including roughing and finish rolling, roughing uses 2 machine frame rolling mill roughing, finish rolling to use 7 frame continuously variable crowns
(Continuously variable crown, cvc) milling train finish rolling.1050 ± 15 DEG C of the start rolling temperature of finish rolling, the finish to gauge of finish rolling
Temperature is 900~920 DEG C.
Step 4：Cooling uses section cooling, back segment to disperse refrigerating mode, and the temperature batched is 700~720 DEG C.
Step 5：Pickling and cold-rolling；
Enter descaling bath, 70~80 DEG C of pickling temperature, pickling speed 120~150m/min, Ran Houjin after hot rolled coil uncoiling
Enter 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 70~75%.
Step 6：Annealing, it is smooth；
Annealing way uses bell-type annealing, and chill volume enters bell type annealing furnace, 710 DEG C of annealing temperature, and soaking time is 10
Hour, temperature retention time 6 hours.Smooth elongation percentage 1.2%.
Deep-draw level Ti-IF cold-rolled steel sheets, the weight/mass percentage composition of the chemical composition of its material includes：C：0.001-
0.003%, Si：0.004-0.006%, Mn：0.14-0.16, P：≤ 0.010%, S：≤ 0.006%, Ti：0.055-
0.075%.
Embodiment 1
Molten iron is carried out into desulfurization pretreatment, molten steel decarburization, dephosphorization is obtained molten steel, steel scrap using top and bottom combined blown converter smelting
Add converter.Then molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place carries out deep carbonization treatment,
Target 20ppm, after decarburization terminates, aluminum shot deoxidation is added according to oxygen situation is determined, and adds the alloys such as ferrotianium to be adjusted composition, really
[the O]≤20ppm protected in molten steel.Chemical composition as shown in table 1 is smelted, 25 DEG C of the sheet billet continuous casting degree of superheat, and casting process should be adopted
With carbon-free middle covering agent, it is to avoid carburetting in casting cycle.Slab cleaning, slow cooling, and continuous casting billet quality inspection are carried out afterwards.Plate
Base heating-up temperature is 1210 DEG C, and the time of heating is 220min, and the slab after heating is carried out into water under high pressure dephosphorization.By fixed width pressure
Power machine fixed width, using 2 frame roughing, 7 frame CVC finish rolling.1023 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 900 DEG C.Layer
Stream cooling disperses cooling using back segment, and coiling temperature is 700 DEG C, and the hot rolling raw thickness for rolling into is 4mm.Finally carry out quality inspection
Look into, qualified obtains final product cold rolling feedses.Descaling bath, 70~80 DEG C of pickling temperature, pickling will be entered after the cold rolling feedses uncoiling again
120~150m/min of speed, subsequently into 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 75%, and final cold rolling plate thickness is
1.0mm.Finally annealed, smooth operation, annealing way uses bell-type annealing, and chill volume enters bell type annealing furnace, annealing temperature
710 DEG C of degree, soaking time is 10 hours, temperature retention time 6 hours, to be ensured in annealing process for bell furnace gas calorific value stabilizing,
Ensure hydrogen, nitrogen gas purity.The annealed strip is finally carried out smooth, then coil into finished product.Smooth operation be to
One deformation of a small amount of of strip is given, it is main to improve material plate shape, smooth elongation percentage 1.2%.As shown in figure 1, for the present invention is implemented
The metallographic structure figure of example 1.Metallographic structure is ferrite+free cementite.
Embodiment 2
Molten iron is carried out into desulfurization pretreatment, molten steel decarburization, dephosphorization is obtained molten steel, steel scrap using top and bottom combined blown converter smelting
Add converter.Then molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place carries out deep carbonization treatment,
Target 20ppm, after decarburization terminates, aluminum shot deoxidation is added according to oxygen situation is determined, and adds the alloys such as ferrotianium to be adjusted composition, really
[the O]≤20ppm protected in molten steel.Chemical composition as shown in table 1 is smelted, 25 DEG C of the sheet billet continuous casting degree of superheat, and casting process should be adopted
With carbon-free middle covering agent, it is to avoid carburetting in casting cycle.Slab cleaning, slow cooling, and continuous casting billet quality inspection are carried out afterwards.Plate
Base heating-up temperature is 1210 DEG C, and the time of heating is 210min, and the slab after heating is carried out into water under high pressure dephosphorization.By fixed width pressure
Power machine fixed width, using 2 frame roughing, 7 frame CVC finish rolling.1020 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 920 DEG C.Layer
Stream cooling disperses cooling using back segment, and coiling temperature is 720 DEG C, and the hot rolling raw thickness for rolling into is 4mm.Finally carry out quality inspection
Look into, qualified obtains final product cold rolling feedses.Descaling bath, 70~80 DEG C of pickling temperature, pickling will be entered after the cold rolling feedses uncoiling again
120~150m/min of speed, subsequently into 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 75%, and final cold rolling plate thickness is
1.0mm.Finally annealed, smooth operation, annealing way uses bell-type annealing, and chill volume enters bell type annealing furnace, annealing temperature
710 DEG C of degree, soaking time is 10 hours, temperature retention time 6 hours, to be ensured in annealing process for bell furnace gas calorific value stabilizing,
Ensure hydrogen, nitrogen gas purity.The annealed strip is finally carried out smooth, then coil into finished product.Smooth operation be to
One deformation of a small amount of of strip is given, it is main to improve material plate shape, smooth elongation percentage 1.2%.As shown in Fig. 2 for the present invention is implemented
The metallographic structure figure of example 2.Metallographic structure is ferrite+free cementite.
Embodiment 3
Molten iron is carried out into desulfurization pretreatment, molten steel decarburization, dephosphorization is obtained molten steel, steel scrap using top and bottom combined blown converter smelting
Add converter.Then molten steel after converter smelting is carried out into RH operations, 1630~1660 DEG C of temperature in place carries out deep carbonization treatment,
Target 20ppm, after decarburization terminates, aluminum shot deoxidation is added according to oxygen situation is determined, and adds the alloys such as ferrotianium to be adjusted composition, really
[the O]≤20ppm protected in molten steel.Chemical composition as shown in table 1 is smelted, 25 DEG C of the sheet billet continuous casting degree of superheat, and casting process should be adopted
With carbon-free middle covering agent, it is to avoid carburetting in casting cycle.Slab cleaning, slow cooling, and continuous casting billet quality inspection are carried out afterwards.Plate
Base heating-up temperature is 1210 DEG C, and the time of heating is 208min, and the slab after heating is carried out into water under high pressure dephosphorization.By fixed width pressure
Power machine fixed width, using 2 frame roughing, 7 frame CVC finish rolling.1028 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 910 DEG C.Layer
Stream cooling disperses cooling using back segment, and coiling temperature is 720 DEG C, and the hot rolling raw thickness for rolling into is 4mm.Finally carry out quality inspection
Look into, qualified obtains final product cold rolling feedses.Descaling bath, 70~80 DEG C of pickling temperature, pickling will be entered after the cold rolling feedses uncoiling again
120~150m/min of speed, subsequently into 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 75%, and final cold rolling plate thickness is
1.0mm.Finally annealed, smooth operation, annealing way uses bell-type annealing, and chill volume enters bell type annealing furnace, annealing temperature
710 DEG C of degree, soaking time is 10 hours, temperature retention time 6 hours, to be ensured in annealing process for bell furnace gas calorific value stabilizing,
Ensure hydrogen, nitrogen gas purity.The annealed strip is finally carried out smooth, then coil into finished product.Smooth operation be to
One deformation of a small amount of of strip is given, it is main to improve material plate shape, smooth elongation percentage 1.2%.As shown in figure 3, for the present invention is implemented
The metallographic structure figure of example 3.Metallographic structure is ferrite+free cementite.
The chemical composition (wt%) of the embodiment of the present invention 1~3 of table 1
| Embodiment | C | Si | Mn | P | S | Alt | Ti |
| 1 | 0.002 | 0.004 | 0.14 | 0.009 | 0.003 | 0.042 | 0.055 |
| 2 | 0.002 | 0.005 | 0.15 | 0.011 | 0.005 | 0.045 | 0.060 |
| 3 | 0.003 | 0.006 | 0.16 | 0.010 | 0.004 | 0.047 | 0.065 |
Cold-rolled steel sheet to the embodiment of the present invention 1~3 carries out mechanical properties test, and assay is shown in Table 2.
The mechanical property of the steel plate of the embodiment of the present invention 1~3 of table 2
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with various
Form specific implementation without deviating from invention it is spiritual or substantive, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and widely being explained in the spirit and scope that should be limited in appended claims, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (8)
1. a kind of deep-draw level Ti-IF cold-rolled steel sheets, it is characterised in that：The weight/mass percentage composition of the chemical composition of material includes：C
0.001-0.003%, Si 0.004-0.006%, Mn 0.14-0.16, P≤0.010%, S≤0.006%, Ti 0.055-
0.075%.
2. the preparation method of a kind of deep-draw level Ti-IF cold-rolled steel sheets, including：
Rolling；Rolling includes roughing and finish rolling, and roughing uses 2 machine frame rolling mill roughing, finish rolling to use 7 frame continuously variable crown milling trains
Finish rolling；1050 ± 15 DEG C of the start rolling temperature of finish rolling, the finishing temperature of finish rolling is 900~920 DEG C；
Section cooling and batch, the temperature batched is 700~720 DEG C；
It is pickling, cold rolling；Into descaling bath after hot rolled coil uncoiling, 70~80 DEG C of pickling temperature, 120~150m/min of pickling speed,
Subsequently into 5 Stands Cold Tandem Mill groups, cold rolling total reduction is 70~75%；
Annealing, it is smooth after obtain deep-draw level Ti-IF cold-rolled steel sheets；Annealing way uses bell-type annealing, the chemical composition of material
Weight/mass percentage composition includes：C 0.001-0.003%, Si 0.004-0.006%, Mn 0.14-0.16, P≤0.010%, S≤
0.006%, Ti 0.055-0.075%.
3. the preparation method of deep-draw as claimed in claim 2 level Ti-IF cold-rolled steel sheets, it is characterised in that：Also include smelting, connect
Casting；Smelting includes molten iron pretreatment, converter smelting, the refining of RH stoves；Steelmaking process controls [O]≤20ppm, [N]≤30ppm.
4. the preparation method of deep-draw as claimed in claim 2 level Ti-IF cold-rolled steel sheets, it is characterised in that：Also include heating of plate blank；
Heating process is strict controlled in stove time, 1210 ± 15 DEG C of tapping temperature.
5. the preparation method of deep-draw as claimed in claim 2 level Ti-IF cold-rolled steel sheets, it is characterised in that：By steel after converter smelting
Water carries out RH operations, and 1630~1660 DEG C of temperature in place carries out deep carbonization treatment, target 20ppm, after decarburization terminates, according to fixed
Oxygen situation adds aluminum shot deoxidation, and adds the alloys such as ferrotianium to be adjusted composition, it is ensured that [the O]≤20ppm in molten steel；Slab connects
25 DEG C of the degree of superheat of casting, casting process should use carbon-free middle covering agent, it is to avoid carburetting in casting cycle；Slab heating temperature is
1210 DEG C, the time of heating is 220min；1023 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 900 DEG C；Coiling temperature is
700 DEG C, the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is 75%, and Cold Rolled Plate Thickness is 1.0mm；In annealing process
Ensure for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen gas purity.
6. the preparation method of deep-draw as claimed in claim 2 level Ti-IF cold-rolled steel sheets, it is characterised in that：By steel after converter smelting
Water carries out RH operations, and 1630~1660 DEG C of temperature in place carries out deep carbonization treatment, target 20ppm, after decarburization terminates, according to fixed
Oxygen situation adds aluminum shot deoxidation, and adds the alloys such as ferrotianium to be adjusted composition, it is ensured that [the O]≤20ppm in molten steel；Slab connects
25 DEG C of the degree of superheat of casting, casting process should use carbon-free middle covering agent, it is to avoid carburetting in casting cycle；Slab heating temperature is
1210 DEG C, the time of heating is 210min；1020 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 920 DEG C；Coiling temperature is
720 DEG C, the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is 75%, and Cold Rolled Plate Thickness is 1.0mm；In annealing process
Ensure for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen gas purity.
7. the preparation method of deep-draw as claimed in claim 2 level Ti-IF cold-rolled steel sheets, it is characterised in that：By steel after converter smelting
Water carries out RH operations, and 1630~1660 DEG C of temperature in place carries out deep carbonization treatment, target 20ppm, after decarburization terminates, according to fixed
Oxygen situation adds aluminum shot deoxidation, and adds the alloys such as ferrotianium to be adjusted composition, it is ensured that [the O]≤20ppm in molten steel；Slab connects
25 DEG C of the degree of superheat of casting, casting process should use carbon-free middle covering agent, it is to avoid carburetting in casting cycle；Slab heating temperature is
1210 DEG C, the time of heating is 208min；1028 DEG C of finish rolling start rolling temperature, finish rolling finishing temperature is 910 DEG C；Coiling temperature is
720 DEG C, the hot rolling raw thickness for rolling into is 4mm；Cold rolling total reduction is 75%, and Cold Rolled Plate Thickness is 1.0mm；In annealing process
Ensure for bell furnace gas calorific value stabilizing, it is ensured that hydrogen, nitrogen gas purity.
8. as described in claim 2,5~7 any one deep-draw level Ti-IF cold-rolled steel sheets preparation method, it is characterised in that：It is chill
Involve in into bell type annealing furnace, 710 DEG C of annealing temperature, soaking time is 10 hours, temperature retention time 6 hours, smooth elongation percentage
1.2%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234614A (en) * | 2018-09-05 | 2019-01-18 | 湖南华菱涟钢薄板有限公司 | A kind of ultra-deep rushes the production method of grade IF steel |
| 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 |
| CN110172637A (en) * | 2019-03-29 | 2019-08-27 | 宁波钢铁有限公司 | A kind of 340MPa grades of deep-draw high-strength IF steel band and preparation method thereof |
| CN110643887A (en) * | 2019-10-17 | 2020-01-03 | 中天钢铁集团有限公司 | Ultra-low carbon steel for deep drawing and production process thereof |
| CN111676420A (en) * | 2020-05-12 | 2020-09-18 | 包头钢铁（集团）有限责任公司 | Television backboard for household appliances and manufacturing method thereof |
| CN112831727A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Steel plate for electromagnetic switch and production method thereof |
| CN114558904A (en) * | 2022-03-22 | 2022-05-31 | 新疆八一钢铁股份有限公司 | Cold rolling and cover annealing process of deep-drawing Ti-IF steel |
| CN114682642A (en) * | 2022-03-30 | 2022-07-01 | 鞍钢股份有限公司 | Production method of high-plate-shape-quality thin-specification high-strength hot continuous rolling wear-resistant steel plate |
| CN115074619A (en) * | 2022-05-09 | 2022-09-20 | 包头钢铁（集团）有限责任公司 | Ultra-deep drawing Nb + Ti-IF cold-rolled steel sheet and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234614A (en) * | 2018-09-05 | 2019-01-18 | 湖南华菱涟钢薄板有限公司 | A kind of ultra-deep rushes the production method of grade IF steel |
| 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 |
| CN110172637B (en) * | 2019-03-29 | 2021-12-28 | 宁波钢铁有限公司 | High-strength interstitial-free steel strip for 340 MPa-level deep drawing and preparation method thereof |
| CN110172637A (en) * | 2019-03-29 | 2019-08-27 | 宁波钢铁有限公司 | A kind of 340MPa grades of deep-draw high-strength IF steel band and preparation method thereof |
| CN110643887A (en) * | 2019-10-17 | 2020-01-03 | 中天钢铁集团有限公司 | Ultra-low carbon steel for deep drawing and production process thereof |
| CN111676420A (en) * | 2020-05-12 | 2020-09-18 | 包头钢铁（集团）有限责任公司 | Television backboard for household appliances and manufacturing method thereof |
| CN112831727A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Steel plate for electromagnetic switch and production method thereof |
| CN112831727B (en) * | 2021-01-06 | 2023-03-03 | 鞍钢股份有限公司 | Steel plate for electromagnetic switch and production method thereof |
| CN114558904A (en) * | 2022-03-22 | 2022-05-31 | 新疆八一钢铁股份有限公司 | Cold rolling and cover annealing process of deep-drawing Ti-IF steel |
| CN114558904B (en) * | 2022-03-22 | 2022-12-30 | 新疆八一钢铁股份有限公司 | Cold rolling and cover annealing process of deep drawing Ti-IF steel |
| CN114682642A (en) * | 2022-03-30 | 2022-07-01 | 鞍钢股份有限公司 | Production method of high-plate-shape-quality thin-specification high-strength hot continuous rolling wear-resistant steel plate |
| CN114682642B (en) * | 2022-03-30 | 2023-09-26 | 鞍钢股份有限公司 | Production method of high-plate-shape quality thin-specification high-strength hot continuous rolling wear-resistant steel plate |
| CN115074619A (en) * | 2022-05-09 | 2022-09-20 | 包头钢铁（集团）有限责任公司 | Ultra-deep drawing Nb + Ti-IF cold-rolled steel sheet and preparation method thereof |
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