CN106191682B - A kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet and its production method - Google Patents
A kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet and its production method Download PDFInfo
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Abstract
The present invention relates to a kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet and its production method, mainly solves the technical problem that existing easy-open end draw ring cold rolling hot-dip galvanized steel sheet tensile strength is low, production cost is high.A kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet provided by the invention, its chemical composition mass percent are：C：0.025%~0.04%, Si：0.005%~0.03%, Mn：0.26%~0.35%, P≤0.015%, S≤0.013%, Alt：0.03%~0.07%, B：0.004%~0.005%, surplus is iron and is unavoidably mingled with.Present invention is mainly used for the draw ring for making easy-open end.
Description
Technical field
The invention belongs to technical field of iron-base alloy, is related to a kind of cold rolling hot-dip galvanized steel sheet, more particularly to a kind of easily to open
Lid draw ring cold rolling hot-dip galvanized steel sheet and its production method.
Background technology
Metal packing material has the characteristics of incrustation performance is good, intensity is high, convenient storage transport etc. is prominent, increasingly by
To liking for people.Metal can is initially to have become soda, fruit for packaged food, two, three beverage cans of metal
One of main packaged form of juice, beer etc..At present, although popular beverage can specifications and models are many on the market, its cover
Use Lift-ring Type Tear-off Lid mostly.Basic demand to easy-open end draw ring is that must possess higher intensity, successfully will
The sealing of metal can is pulled open.Existing easy-open end draw ring uses aluminum alloy plate materials or ferrostan as moulding material more, wherein
Because the intensity of aluminum alloy plate materials is relatively low, after draw ring is made, in use, it is easy to cause draw ring damage or draw ring fracture
The problems such as, it have impact on the normal use of user；Although the intensity of ferrostan has a distinct increment compared to aluminum alloy plate materials, but anti-
Corrosivity is poor, and after stamped shaping, its incision gets rusty easily blackening, has a strong impact on attractive in appearance, and on the other hand, its intensity is not yet
It is to reduce cost to carry out material the thinned requirement of thickness to adapt to modern enterprise, using upper limited more.
Chinese Patent Application No. is that CN 200910142860.8 patent application discloses the " plating for tear-off tin pull ring
The surface treatment method of zinc color painted steel strip ", annealing temperature is higher in the fabrication process for the steel plate of the patent application publication, reaches
To 600~700 DEG C, soaking time is also longer, is 120~150S, causes that produced armor plate strength is relatively low, and tensile strength is less than
425MPa, it is impossible to meet the strength demand of modern easy-open end draw ring steel, its core technology is mainly the table of protective coating steel plate
Face processing method.
Chinese Patent Application No. is that CN 200880011757.3 patent application discloses the " compacting of excellent in low temperature toughness
Processing hot-dip high-strength steel sheet and its manufacture method ", a kind of hot-dip high-strength steel sheet of the patent application publication and its
Production method, the hot-dip high-strength steel sheet contain by weight percentage：Carbon：0.0005~0.005%, silicon：0.30~
1.0%, manganese：0.7~2.0%, phosphorus≤0.05%, sulphur≤0.01%, niobium：0.01~0.04%, titanium：0.01~0.05%, aluminium：
0.01~0.3%, boron：0.0005~0.003%, nitrogen：0.001~0.01%.The steel contains the elements such as higher silicon, manganese, and
A variety of microalloy elements such as niobium, titanium need to be added into steel, cost is higher, and the tensile strength of the steel is less than 540MPa, it is impossible to
Meet the manufacture requirement of easy-open end draw ring.
The content of the invention
It is an object of the invention to provide a kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet and its production method, main solution
The certainly existing easy-open end draw ring technical problem that cold rolling hot-dip galvanized steel sheet tensile strength is low, production cost is high.
The technical solution adopted by the present invention is：
A kind of easy-open end draw ring cold rolling hot-dip galvanized steel sheet, chemical composition mass percent：C：0.025%~0.04%,
Si：0.005%~0.03%, Mn：0.26%~0.35%, P≤0.015%, S≤0.013%, Alt：0.03%~0.07%, B：
0.004%~0.005%, surplus is Fe and inevitable impurity element.
Easy-open end draw ring of the present invention is limited within the above range with the chemical composition of cold rolling hot-dip galvanized steel sheet
Reason is as follows：
Carbon：C content influences the intensity, plasticity, punching performance of product.When C content is high, elongation percentage is low, and shape after deformation
Into uneven deformed area, in recrystallization process, these deformed areas promote the forming core of random orientation recrystal grain, favorably
Texture { 111 } accordingly reduces, and punching performance declines.C content it is low it is cold rolled annealed after can not meet intensity, hardness requirement.Therefore, originally
Invention sets C content as 0.025%~0.04%；
Silicon：Relatively low Si contents in steel, be on the one hand advantageous to the follow-up coating performance of product, on the other hand, product is
It is required that higher Al content, independent of Si element deoxidations.Therefore, the present invention sets Si contents as 0.005~0.03%；
Manganese：The effect of S adverse effect, the technology of the present invention side are mainly strengthened and further eliminated in effects of the Mn in steel
Case sets Mn contents as 0.26-0.35%；
Phosphorus, sulphur：P, S is the harmful element in steel, it is desirable to which both control of element are in relatively low level in steel, is examined
Consider actual process control ability and production cost, technical solution of the present invention setting P≤0.015%, S≤0.013%.
Aluminium：Effects of the Al in steel is extremely important, and Al and N are combined and generated AlN, and AlN is to be obtained in annealing process to cold
Favourable { 111 } texture of performance and the key factor of cheese crystal grain are pulled out, simultaneously because AlN makes cold rolling to the fixation of N atoms
Plate has good aging resistance energy, and therefore, the present invention sets Al content as 0.03%~0.07%.
Boron：B is the element in the main group of second round the 3rd in the periodic table of elements, and it has very strong parent with nitrogen, oxygen and carbon
And power, the outstanding role of boron are the quenching degree that micro boron can exponentially increases steel.Various mechanical performances, the technique of boron steel
Functional, Technology for Heating Processing is simple, cheap.The resource of boron is more, and dosage is few, from the alloying elements for saving a large amount of costlinesses
From the point of view of nickel, chromium, aluminium etc., boron steel just has bigger meaning and attraction.Micro boron mainly exists in steel with solution,
And in Grain Boundary Segregation, make the crystal grain refinement in welding heat affected zone, so as to improve the welding performance of steel plate, and continuously moving back
Accelerate annealing recrystallization during fire, improve the performance uniformity of continuous annealing steel plate；Exactly because B elements can refine crystalline substance
Grain, it is favourable to the welding performance of steel, and crackle in easy-open end draw ring cold rolling hot-dip galvanized steel sheet production process can be reduced
Generation, improve lumber recovery.Through experimental study for many years, the present invention sets B content as 0.004%~0.005%.
The production method of above-mentioned easy-open end draw ring cold rolling hot-dip galvanized steel sheet, this method include：
Molten steel obtains continuous casting steel billet through continuous casting, wherein the mass percent of the molten steel composition is：C：0.025%~
0.04%, Si：0.005%~0.03%, Mn：0.26%~0.35%, P≤0.015%, S≤0.013%, Alt：0.03%~0.07%,
B：0.004%~0.005%, surplus is iron and is unavoidably mingled with；
The heated stove heat of continuous casting steel billet is two-part rolling to hot rolling, described hot rolling is carried out after 1101 DEG C~1130 DEG C
Technique, roughing are 5 passage tandem rollings, are rolled more than austenite recrystallization temperature, and roughing end temp is 1020~1070 DEG C；Essence
Roll for 7 passage tandem rollings, in the non-recrystallization temperature area rolling of austenite, finish rolling end temp is 840 DEG C~850 DEG C, finish rolling pressure
Rate is 75%~79%, and steel plate thickness is 1.4~2.0mm after finish rolling, and the section cooling stage is cooled down using back segment, and coiling temperature is
550 DEG C~560 DEG C are batched to obtain coils of hot-rolled steel；
Coils of hot-rolled steel again after uncoiling through pickling, cold rolling, Horizontal Continuous Furnace annealing, galvanizing by dipping, batch to obtain thickness
It is 78%~83% to spend for 0.29mm~0.40mm finished products, the cold rolling reduction ratio, rolls hard state strip sleeping after cold rolling
The soaking zone temperature of formula continuous annealing furnace annealing is 570 DEG C~580 DEG C, and strip is 70s~90s in the annealing time of soaking zone.
The reasons why production technology that the present invention takes, is as follows：
1st, the setting of continuous casting steel billet heating-up temperature
If continuous casting steel billet heating-up temperature is too high, AlN and Ti in steel（C、N）In heat after being dissolved Deng second phase particles
Roll coiling process and separate out more tiny, disperse precipitate again, then inhibit the crystal grain after subsequent cold rolling, annealing to tie again
Crystalline substance is grown up, and raises the recrystallization temperature of steel plate, it is impossible to adapt to low annealing temperature.If heating-up temperature is too low, due to hot rolling
During natural temperature drop, the finishing temperatures of application claims can not be ensured.Continuous casting steel billet heating-up temperature be set as 1101 DEG C~
1130℃。
2nd, finish rolling end temp is set
To prevent finish rolling from being rolled in two-phase section, finishing temperature need to be higher than Ar3Transformation temperature, but finishing temperature can not be too high, it is no
The heating-up temperature of continuous casting steel billet must be then improved, increases energy consumption.Therefore, consider, finish rolling end temp of the present invention is set as
840 DEG C~850 DEG C.
3rd, hot-rolling coiling temperature is set
Hot-rolling coiling temperature is one of key factor for influenceing rolled steel mechanical performance, and coiling temperature has influence on nitride and carbon
The precipitation of the precipitation process of compound, particularly AlN, the present invention is through the strip for rolling hard state that cold rolling obtains using horizontal continuous
Anneal, annealing temperature is relatively low, in order to ensure that the cold-reduced sheet after annealing has certain intensity, considers, the present invention
Coiling temperature is set as 550 DEG C~560 DEG C.
4th, cold rolling reduction ratio is set
The present invention using once cold rolling produce, with secondary cold-rolling compared with have organization of production conveniently, cost is low, yield is high,
The advantages that Surface Defects in Steel Plate incidence is small.The main technologic parameters that steel plate material is determined in cold rolling process are cold-rolling deformations
Amount, is the bigger the better for general purpose cold-rolling of steel plate deflection, can because big pressure can produce more removable dislocation
Moving dislocation is higher, and resistance of deformation is smaller, and stress is not concentrated to crystal boundary, and shifts deformation to adjacent crystal grain, thus is not easy
Produce skid wire.In addition, deformation energy caused by deflection is bigger is bigger, the unstability of tissue is also higher, so recrystallization temperature
Degree is lower, and the crystal grain after recrystallizing gets over fine uniform, and the intensity and plasticity of steel plate can improve.But when under cold rolling
When rate is more than 85%, the grain size of finished product is held essentially constant；In addition, mill load increase is obvious when reduction ratio is more than 85%,
And cold-rolled process less stable, easily causes production accident.The present invention carries out cold rolling on 5 Stands Cold Tandem Mills, can be with
The tension force of strip is effectively controlled, by suitable cold rolling deformation, can obtain plate shape preferably, yield strength meets the requirements
Coiled sheet.Consider, the reduction ratio of the present invention preferably cold rolling is 78%~83%.
5th, annealing temperature is set
In order that the cold-rolled steel coils after annealing have higher yield strength, the present invention is closed by test of many times
The annealing temperature of reason, steel band annealing temperature of soaking zone in Horizontal Continuous Furnace are set as 570~580 DEG C, and strip is equal
The time of hot arc is set as 70~90s, and the residual stress of cold-rolled strip had both been eliminated by annealing, has obtained the cold rolling of design again
Coil of strip intensity.
The easy-open end draw ring that the present invention obtains is fibrous iron ferritic+pearly-lustre with the microscopic structure of cold rolling hot-dip galvanized steel sheet
Body+free cementite, grain size number are I 8~10 grades, and lower yield strength Rel is 580MPa~600MPa, and tensile strength Rm is
600MPa~730MPa, elongation after fracture A50≥18%。
The present invention has following good effect compared with prior art：
1st, the present invention is by optimizing material component design, continuous casting steel billet heating and temperature control, hot rolling finishing temperature and batching
Temperature control, the control of cold rolling reduction ratio, Horizontal Continuous Furnace annealing temperature and annealing time technological measure, it is strong to obtain surrender
Spend for the MPa of 580MPa~600, there is the cold rolling hot-dip galvanized steel sheet of good cold-formed performance.
2nd, expensive alloying elements are free of in present component, are moved back using hot rolling cooling controlling and rolling controlling process, Horizontal Continuous Furnace
Fiery control technology is produced, simple production process, and production cost is low.
Brief description of the drawings
Fig. 1 is the metallographic microstructure photo of easy-open end draw ring cold rolling hot-dip galvanized steel sheet embodiment 1 of the present invention.
Embodiment
With reference to embodiment 1-4, the invention will be further described, as shown in 1 ~ table of table 4.
1 chemical composition of the present invention of table（Percentage by weight %）, surplus is Fe and inevitable impurity.
| Element | C | Si | Mn | P | S | Alt | B |
| The present invention | 0.025~0.04 | 0.005~0.03 | 0.26~0.35 | ≤0.015 | ≤0.013 | 0.03~0.07 | 0.004~0.005 |
| Embodiment 1 | 0.033 | 0.015 | 0.26 | 0.015 | 0.006 | 0.056 | 0.005 |
| Embodiment 2 | 0.039 | 0.028 | 0.32 | 0.009 | 0.013 | 0.035 | 0.0041 |
| Embodiment 3 | 0.025 | 0.009 | 0.35 | 0.013 | 0.011 | 0.044 | 0.0044 |
| Embodiment 4 | 0.028 | 0.016 | 0.30 | 0.010 | 0.009 | 0.063 | 0.0049 |
The chemical composition molten steel that meets the requirements is obtained by converter melting, molten steel blows Ar protection direct castings through whole process and connected
Cast panel base, thickness are 210~230mm, and width is 800~1300mm, and length is 5000~10000mm.
The scale slab of STEELMAKING PRODUCTION delivers to heating furnace reheating, delivers on continuous hot tandem rolling mill and rolls after dephosphorization of coming out of the stove
System.After roughing milling train and finish rolling Continuous mill train controlled rolling, section cooling takes back segment to cool down, and is then batched, production
Go out coils of hot-rolled steel.Hot rolling technology control is shown in Table 2.
The hot rolling technology control parameter of the present invention of table 2
| Hot Rolling Parameters | Slab heating temperature/DEG C | Roughing end temp/DEG C | Finish rolling end temp/DEG C | Finish rolling reduction ratio/% | Coiling temperature/DEG C | Hot rolling plate thickness/mm |
| The present invention | 1101-1130 | 1020~1070 | 840-850 | 75~79 | 550~560 | 1.4-2.0 |
| Embodiment 1 | 1101 | 1022 | 850 | 76 | 555 | 2.0 |
| Embodiment 2 | 1129 | 1069 | 848 | 79 | 551 | 1.9 |
| Embodiment 3 | 1118 | 1053 | 840 | 78 | 559 | 1.6 |
| Embodiment 4 | 1110 | 1030 | 843 | 77 | 557 | 1.4 |
By above-mentioned coils of hot-rolled steel again uncoiling after overpickling, cold rolling, the pressure of cold rolling are carried out on 5 Stands Cold Tandem Mills
Rate is 78%~83%, and the steel band for rolling hard state after cold rolling passes through Horizontal Continuous Furnace annealing, galvanizing by dipping, batched
To thickness 0.29mm~0.40mm finished product cold rolling hot-dip galvanized steel strip.Annealing process is：Steel band is in Horizontal Continuous Furnace
The annealing region of soaking zone is 570 DEG C~580 DEG C, is 70s~90s in the time of soaking zone.Process control parameter is shown in Table
3。
3 cold rolling of the present invention of table, annealing regulation parameter
| Cold rolling, annealing parameter | Cold rolling reduction ratio/% | Annealing temperature/DEG C | The soaking zone time/s | Cold Rolled Plate Thickness/mm |
| The present invention | 78~83 | 570~580 | 70~90 | 0.29-0.40 |
| Embodiment 1 | 80 | 577 | 73 | 0.40 |
| Embodiment 2 | 83 | 580 | 79 | 0.32 |
| Embodiment 3 | 78 | 570 | 80 | 0.35 |
| Embodiment 4 | 79 | 573 | 85 | 0.29 |
By the obtained cold-rolled steel sheet of the present invention according to《GB/T228.1-2010 metal material stretching test part 1s：Room
Warm test method》Carry out tension test.
The easy-open end draw ring cold rolling hot-dip galvanized steel sheet obtained using the above method.1 easy-open end draw ring is used referring to the drawings
The microscopic structure of cold rolling hot-dip galvanized steel sheet is fibrous iron ferritic+pearlite+free cementite, and grain size number is I 8~10
Level, lower yield strength Rel is 580MPa~600MPa, and tensile strength Rm is 600MPa~730MPa, elongation after fracture A50≥
18%, while there is good processing characteristics.
Easy-open end draw ring, which is obtained, using the above method is shown in Table 4 with the mechanical property of cold rolling hot-dip galvanized steel sheet.
The mechanical property of the cold rolling hot-dip galvanized steel sheet of the present invention of table 4
| Performance indications | Lower yield strength/MPa | Tensile strength/MPa | Elongation after fracture A50/% |
| The present invention | 580~600 | 600~730 | ≥18% |
| Embodiment 1 | 598 | 615 | 26 |
| Embodiment 2 | 581 | 728 | 18 |
| Embodiment 3 | 590 | 663 | 23 |
| Embodiment 4 | 592 | 688 | 20 |
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (3)
- A kind of 1. easy-open end draw ring cold rolling hot-dip galvanized steel sheet, it is characterized in that chemical composition mass percent is：C：0.025% ~0.04%, Si：0.005%~0.03%, Mn：0.26%~0.35%, P≤0.015%, S≤0.013%, Alt： 0.03%~0.07%, B：0.004%~0.005%, surplus is Fe and inevitable impurity element；It is organized as threadiness Ferrite+pearlite+free cementite, the tissue grain size is I 8~10 grades；Its 0.29mm~0.40mm thickness easy-open end is drawn Ring is 580MPa~600MPa with cold rolling hot-dip galvanized steel sheet lower yield strength Rel, and tensile strength Rm is 600MPa~730MPa, Elongation after fracture A50>=18%.
- 2. the production method of easy-open end draw ring cold rolling hot-dip galvanized steel sheet as claimed in claim 1, including：Molten steel obtains continuous casting steel billet through continuous casting；The heated stove heat of continuous casting steel billet is that two-part rolls work to hot rolling, described hot rolling is carried out after 1101 DEG C~1130 DEG C Skill, roughing are 5 passage tandem rollings, are rolled more than austenite recrystallization temperature, and roughing end temp is 1020~1070 DEG C；Finish rolling For 7 passage tandem rollings, in the non-recrystallization temperature area rolling of austenite, finish rolling end temp is 840 DEG C~850 DEG C, finish rolling reduction ratio For 75%~79%, after finish rolling the section cooling stage cooled down using back segment, coiling temperature is 550 DEG C~560 DEG C and batches to obtain heat Rolled steel coils；Coils of hot-rolled steel again after uncoiling through pickling, cold rolling, Horizontal Continuous Furnace annealing, galvanizing by dipping, batch to obtain thickness be 0.29mm~0.40mm finished products, the cold rolling reduction ratio are 78%~83%, roll hard state strip horizontal after cold rolling The soaking zone temperature of continuous annealing furnace annealing is 570 DEG C~580 DEG C, and strip is 70s~90s in the annealing time of soaking zone.
- 3. the production method of easy-open end draw ring cold rolling hot-dip galvanized steel sheet as claimed in claim 2, it is characterized in that, hot rolling essence After rolling, it is 1.4~2.0mm to control hot rolled steel plate thickness.
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| JP7028324B2 (en) * | 2018-07-30 | 2022-03-02 | 日本製鉄株式会社 | Manufacturing method of hot-dip galvanized steel sheet and manufacturing method of alloyed hot-dip galvanized steel sheet |
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| CN115491583B (en) * | 2021-06-18 | 2023-09-05 | 上海梅山钢铁股份有限公司 | Ultra-deep drawing cold-rolled hot-dip aluminum-zinc steel plate and manufacturing method thereof |
| CN116179935A (en) * | 2021-11-29 | 2023-05-30 | 上海梅山钢铁股份有限公司 | Cold-rolled steel plate with tensile strength of 360MPa for condenser tube and production method thereof |
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