CN108396243B - Hard tinned substrate for bottle cap and production method thereof - Google Patents
Hard tinned substrate for bottle cap and production method thereof Download PDFInfo
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- CN108396243B CN108396243B CN201810049988.9A CN201810049988A CN108396243B CN 108396243 B CN108396243 B CN 108396243B CN 201810049988 A CN201810049988 A CN 201810049988A CN 108396243 B CN108396243 B CN 108396243B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
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- 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
- C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
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- 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
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/003—Cementite
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- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a hard tinned substrate for a bottle cap and a production method thereof, wherein the substrate comprises the following chemical components in percentage by mass: c: 0.06-0.10%, Mn: 0.30-0.60%, Al: 0.02-0.08%, less than or equal to 0.03% of Si, less than or equal to 0.005% of N, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe and other inevitable impurities. The production method comprises the working procedures of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing. According to the invention, through the design of proper component design, annealing and secondary cold rolling process, the secondary cold rolling tinned substrate with higher hardness and better elongation is manufactured, the production control difficulty is small, the cost is low, the performance is stable, and the method is suitable for manufacturing crown caps, screw caps and the like.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a hard tinned substrate for a bottle cap and a production method thereof.
Background
The tin/chromium plated sheet has good formability and corrosion resistance, can be further processed and formed by welding, seaming, stamping and the like, and has good printing and coloring properties, so the tin/chromium plated sheet is widely applied to tank bodies and tank covers in the packaging industry. In recent years, in order to save cost, the packaging industry is required to reduce the thickness of a tin/chromium plated plate and improve the utilization rate of a packaging material on the basis of not losing or even improving the service performance. The Double Cold Reduction (DCR) process is a preferred method for obtaining a tin/chromium plated substrate with thinner thickness and better roughness and flatness on the basis of improving the mechanical property of strip steel, thereby effectively meeting the requirements of thinning food, beverages, chemical tank and cover materials and reducing the cost.
The mechanical properties of DR materials depend on many factors including the chemical composition of the steel, the annealing regime and the degree of temper rolling. The DR material is usually made of low-carbon aluminum killed steel, and a small amount of IF steel is used, and continuous annealing or cover annealing is adopted. Because the DR material produced by the hood-type annealing mode has high requirements on quality control such as surface quality, plate shape and the like, large-scale cold rolling plants gradually adopt a continuous annealing mode with more easily controlled quality to produce the DR material. However, the DR material produced by the hood annealing has better deep drawability than the DR material produced by the continuous annealing due to the remarkable development of the fiber texture obtained by controlling the precipitation of AlN in the structure. In addition, the continuous annealing production line has large investment and high energy consumption, which leads to the decrease of the competitiveness of DR products produced by continuous annealing. Therefore, there is still a great user demand for the hood-annealed DR material.
Disclosure of Invention
The invention aims to provide a hard tinned substrate for a bottle cap and a production method thereof. The method has the advantages of low production cost, simple process and good product forming performance, and can bring considerable economic benefit.
In order to solve the technical problems, the invention adopts the following technical scheme: the hard tinned substrate for the bottle cap comprises the following chemical components in percentage by mass: c: 0.06-0.10%, Mn: 0.30-0.60%, Al: 0.02-0.08%, less than or equal to 0.03% of Si, less than or equal to 0.005% of N, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe and other inevitable impurities.
The microstructure of the substrate is plastic deformation ferrite and strip-shaped distributed granular cementite, and the thickness of the finished substrate is 0.20-0.50 mm.
The tensile strength of the substrate is 540-620 MPa, the yield strength is 520-600 MPa, the elongation A80 after fracture is 5-10%, and the hardness HR30T is 73 +/-5.
The invention also provides a production method of the hard tinned substrate for the bottle cap, which comprises the working procedures of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing; in the secondary cold rolling process, the cold rolling reduction rate is 15-30%.
The smelting and refining process adopts converter smelting, top and bottom combined blowing, full decarburization, LF refining for deoxidation, desulfurization and alloying, RH refining for reducing the content of harmful gas N, H, wherein N is less than or equal to 0.005 percent, and H is less than or equal to 0.0005 percent, and then slab continuous casting is carried out.
In the hot rolling procedure, 5 passes of rough rolling pass are performed, and the thickness of an intermediate blank is 32-40 mm; and (3) carrying out finish rolling on 7 passes, wherein the pass reduction rate is more than or equal to 10%, and the total reduction rate is more than or equal to 80%.
The hot rolling process is characterized in that continuous rolling is carried out within a complete recrystallization temperature range, the heating temperature of a continuous casting billet before rolling is 1230-1270 ℃, the furnace residence time is 120-160 min, and the tapping temperature is 1130-1150 ℃; the inlet temperature of finish rolling is 1030-1070 ℃, the finish rolling temperature is 880-910 ℃, and the coiling temperature is 580-620 ℃.
In the hot rolling procedure, a U-shaped coiling mode is started in the coiling temperature layer cooling process, and the coiling temperature is 20 ℃ higher than the strip steel head and tail by 30 meters; and after rolling, quickly cooling the front section at the cooling speed of 60-100 ℃/s, and controlling the ratio of water to be 1: 1.
The one-time cold rolling process has the reduction rate of 88-93%.
The annealing process adopts a full-hydrogen hood-type annealing furnace, the temperature is controlled to be 560-600 ℃, and the heat preservation time is 15-20 hours.
The design idea of the chemical components of the substrate is as follows:
c is one of indispensable strengthening elements in steel, and it can increase yield strength and decrease elongation by solid solution strengthening, and too much C affects formability and weldability. Therefore, the hard tinned substrate for the bottle cap is made of low-carbon steel, the content of C is controlled to be 0.06-0.10%, the strength can be guaranteed, and meanwhile, the hard tinned substrate has good service performance.
Si has a significant influence on the corrosion resistance of steel, with higher Si content giving lower corrosion resistance. Further, Si is a deoxidizing element and also a solid-solution strengthening element, and increases the yield strength and lowers the elongation, and the content thereof is controlled to 0.03% or less.
Mn is a ferrite strengthening element, and is also a common strengthening element in steel. In addition, the addition of manganese to the steel prevents embrittlement of the steel due to sulfur during hot working. However, the content of Mn in the steel is high, the corrosion resistance and the elongation of the tin plate can be reduced, and the content is controlled to be 0.30-0.60%.
P, S, the content of impurity elements is controlled to 0.020% or less, which can improve the strength and make the steel sheet brittle and affect the toughness.
Al is an element necessary for deoxidation, but also can improve the strength of the steel, and the content of Al is controlled to be 0.02-0.08%.
The strength of the steel can be obviously improved by the solid solution of N, and the content of N is controlled to be less than 0.005%.
The invention has the remarkable effects and technical characteristics that:
the smelting process adopts the converter to automatically make steel, can ensure the accurate control of the end point carbon of the converter, reduce the after-blowing, reduce the oxygen content of molten steel, reduce the sampling times of tilting and the after-blowing, reduce the consumption of deoxidizer and reduce the level of deoxidized inclusions. In the refining process, LF and RH are in duplex connection, LF refining is used for deoxidation, desulfurization and alloying, RH refining is used for reducing the content of harmful gas N, H, and then slab continuous casting is carried out.
The higher the reduction ratio in the first cold rolling step, the higher the degree of fibrillation of crystal grains, and the larger the number of defects such as subgrain boundaries and dislocations. Therefore, in the case annealing, the larger the number of recrystallization nuclei, the finer and more uniform the crystal grains after recrystallization. Therefore, the first cold rolling integrated reduction of the present invention is controlled to a large deformation amount of 88 to 93%.
AlN precipitates in the hot rolled steel strip coiled at a low temperature are excessively cooled so that Al dissolved in the steel and AlN precipitates occurring by heating in the bell type furnace exert a strong hysteresis effect on recrystallization. In the cold-deformed structure, the nitrides formed mainly at the grain boundaries of the strongly elongated grains inhibit the recrystallization of ferrite, so that an elongated "cake-shaped" grain structure is produced in the AlN particle lattice from relatively coarse ferrite grains. Due to the orientation selection, ferrite grains exhibit a {111} preferred orientation characteristic. When the strip is kept in a lower annealing temperature interval in the bell type furnace for a longer time, recrystallization crystal nuclei are increased along with the growth of crystal grains, and in the process, the crystal grains with the {111} orientation are preferentially grown, so that the texture strengthening is generated, and the texture strengthening is very favorable for improving the r value of the strip. Therefore, the hot rolling coiling temperature of the invention is controlled to be 580-620 ℃, the annealing temperature is controlled to be 560-600 ℃, and the heat preservation time is controlled to be 15-20 hours.
The standard of the tinned substrate product is referred to JIS G3303-2008.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the invention manufactures the secondary cold-rolled tinned substrate with higher hardness and better elongation through the design of proper component design, annealing and secondary cold-rolling process, has small production control difficulty, low cost and stable performance, and is suitable for manufacturing crown caps, screw caps and the like.
Drawings
FIG. 1 is a cross-sectional metallographic image of the edge of the substrate of example 1;
FIG. 2 is a longitudinal metallographic microstructure of the edge portion of the substrate of example 1;
FIG. 3 is a cross-sectional microstructure of the core of the substrate of example 2;
FIG. 4 is a longitudinal microstructure of the core of the substrate of example 2;
FIG. 5 is a cross-sectional metallographic image of the edge of the substrate of example 3;
FIG. 6 is a longitudinal metallographic microstructure of the edge portion of the substrate of example 3;
FIG. 7 is a cross-sectional metallographic image of the edge of the substrate of example 4;
FIG. 8 is a longitudinal metallographic microstructure of the edge of the substrate of example 4.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples.
Example 1
The hard tinned substrate for the bottle cap is 0.50mm in finished product thickness, and comprises the following chemical components in percentage by mass: c: 0.06%, Mn: 0.53%, Al: 0.02%, Si: 0.022%, N: 0.003%, S: 0.015%, P: 0.020%, and the balance of Fe and other inevitable impurities.
The production method of the hard tinned substrate for the bottle cap comprises the following steps of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing, and comprises the following specific process steps:
(1) smelting process adopts a converter for smelting, full decarburization is realized through top and bottom combined blowing, LF refining is used for deoxidation and desulfurization alloying, RH refining is adopted to reduce the content of harmful gas N, H, and N: 0.003%, H: 0.0001%, and then performing slab continuous casting;
(2) hot rolling, wherein the rough rolling passes are 5, and the thickness of the intermediate billet is 40 mm; 7 passes of finish rolling, the pass reduction rate is 13 percent, and the total reduction rate is 88 percent;
continuously rolling within the complete recrystallization temperature range, wherein the heating temperature of the continuous casting billet before rolling is 1250 ℃, the furnace residence time is 120min, and the tapping temperature is 1130 ℃; the inlet temperature of finish rolling is 1030 ℃, the finish rolling temperature is 880 ℃, and the coiling temperature is 600 ℃;
starting a U-shaped coiling mode in the coiling temperature layer cooling process, wherein the coiling temperature is 20 ℃ higher than the strip steel head and tail by 30 meters; after rolling, the front section is rapidly cooled at the cooling speed of 60 ℃/s, and the water-feeding and water-discharging ratio is controlled to be 1: 1;
(3) a cold rolling process is carried out for one time, and the reduction rate is 88%;
(4) the annealing process adopts an all-hydrogen hood-type annealing furnace, the temperature is controlled to be 560 ℃, and the heat preservation time is 16 h;
(5) the cold rolling reduction in the secondary cold rolling step was 15%.
The microstructure of the substrate obtained in this example is plastic deformation ferrite + band-shaped distribution of granular cementite, and the specific mechanical properties are shown in table 1.
Example 2
The hard tinned substrate for the bottle cap is 0.40mm in finished product thickness, and comprises the following chemical components in percentage by mass: c: 0.10%, Mn: 0.45%, Al: 0.08%, Si: 0.030%, N: 0.002%, S: 0.006%, P: 0.010% and the balance of Fe and other inevitable impurities.
The production method of the hard tinned substrate for the bottle cap comprises the following steps of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing, and comprises the following specific process steps:
(1) smelting process adopts a converter for smelting, full decarburization is realized through top and bottom combined blowing, LF refining is used for deoxidation and desulfurization alloying, RH refining is adopted to reduce the content of harmful gas N, H, and N: 0.002%, H: 0.0002 percent, and then carrying out slab continuous casting;
(2) hot rolling, wherein the rough rolling passes are 5, and the thickness of the intermediate billet is 38 mm; 7 passes of finish rolling, the pass reduction rate is 10 percent, and the total reduction rate is 80 percent;
continuously rolling within the complete recrystallization temperature range, wherein the heating temperature of the continuous casting billet before rolling is 1245 ℃, the furnace holding time is 135min, and the furnace discharging temperature is 1140 ℃; the inlet temperature of finish rolling is 1045 ℃, the finish rolling temperature is 890 ℃, and the coiling temperature is 580 ℃;
starting a U-shaped coiling mode in the coiling temperature layer cooling process, wherein the coiling temperature is 20 ℃ higher than the strip steel head and tail by 30 meters; after rolling, the front section is rapidly cooled at the cooling speed of 90 ℃/s, and the water-feeding and water-discharging ratio is controlled to be 1: 1;
(3) a cold rolling process is carried out for one time, and the reduction rate is 90 percent;
(4) the annealing process adopts a full-hydrogen hood-type annealing furnace, the temperature is controlled at 575 ℃, and the heat preservation time is 15 hours;
(5) the cold rolling reduction in the secondary cold rolling step was 20%.
The microstructure of the substrate obtained in this example is plastic deformation ferrite + band-shaped distribution of granular cementite, and the specific mechanical properties are shown in table 1.
Example 3
The hard tinned substrate for the bottle cap is 0.30mm in finished product thickness, and comprises the following chemical components in percentage by mass: c: 0.07%, Mn: 0.30%, Al: 0.055%, Si: 0.015%, N: 0.005%, S: 0.001%, P: 0.008% and the balance of Fe and other inevitable impurities.
The production method of the hard tinned substrate for the bottle cap comprises the following steps of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing, and comprises the following specific process steps:
(1) smelting process adopts a converter for smelting, full decarburization is realized through top and bottom combined blowing, LF refining is used for deoxidation and desulfurization alloying, RH refining is adopted to reduce the content of harmful gas N, H, and N: 0.005%, H: 0.0003 percent, and then carrying out slab continuous casting;
(2) hot rolling, wherein the rough rolling passes are 5, and the thickness of the intermediate blank is 35 mm; 7 passes of finish rolling, the pass reduction rate is 13 percent, and the total reduction rate is 89 percent;
continuously rolling within the range of complete recrystallization temperature, wherein the heating temperature of the continuous casting billet before rolling is 1270 ℃, the furnace residence time is 160min, and the discharge temperature is 1150 ℃; the inlet temperature of finish rolling is 1070 ℃, the finish rolling temperature is 910 ℃, and the coiling temperature is 620 ℃;
starting a U-shaped coiling mode in the coiling temperature layer cooling process, wherein the coiling temperature is 20 ℃ higher than the strip steel head and tail by 30 meters; after rolling, the front section is rapidly cooled at the cooling speed of 80 ℃/s, and the water-feeding and water-discharging ratio is controlled to be 1: 1;
(3) a cold rolling process is carried out for one time, and the reduction rate is 90 percent;
(4) the annealing process adopts an all-hydrogen hood-type annealing furnace, the temperature is controlled at 580 ℃, and the heat preservation time is 20 hours;
(5) the cold rolling reduction in the secondary cold rolling step was 25%.
The microstructure of the substrate obtained in this example is plastic deformation ferrite + band-shaped distribution of granular cementite, and the specific mechanical properties are shown in table 1.
Example 4
The hard tinned substrate for the bottle cap is 0.20mm in finished product thickness, and comprises the following chemical components in percentage by mass: c: 0.08%, Mn: 0.60%, Al: 0.063%, Si: 0.011%, N: 0.004%, S: 0.020%, P: 0.015% and the balance Fe and other unavoidable impurities.
The production method of the hard tinned substrate for the bottle cap comprises the following steps of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing, and comprises the following specific process steps:
(1) smelting process adopts a converter for smelting, full decarburization is realized through top and bottom combined blowing, LF refining is used for deoxidation and desulfurization alloying, RH refining is adopted to reduce the content of harmful gas N, H, and N: 0.004%, H: 0.0005%, and then performing slab continuous casting;
(2) hot rolling, wherein the rough rolling passes are 5, and the thickness of the intermediate billet is 32 mm; 7 passes of finish rolling, the pass reduction rate is 13 percent, and the total reduction rate is 88 percent;
continuously rolling within the complete recrystallization temperature range, wherein the heating temperature of the continuous casting billet before rolling is 1230 ℃, the furnace residence time is 155min, and the tapping temperature is 1150 ℃; the inlet temperature of finish rolling is 1055 ℃, the finish rolling temperature is 905 ℃ and the coiling temperature is 610 ℃;
starting a U-shaped coiling mode in the coiling temperature layer cooling process, wherein the coiling temperature is 20 ℃ higher than the strip steel head and tail by 30 meters; after rolling, the front section is rapidly cooled at the cooling speed of 100 ℃/s, and the water-feeding and water-discharging ratio is controlled to be 1: 1;
(3) a cold rolling process is carried out for one time, and the reduction rate is 93 percent;
(4) the annealing process adopts an all-hydrogen hood-type annealing furnace, the temperature is controlled at 600 ℃, and the heat preservation time is 18 hours;
(5) the cold rolling reduction in the secondary cold rolling step was 30%.
The microstructure of the substrate obtained in this example is plastic deformation ferrite + band-shaped distribution of granular cementite, and the specific mechanical properties are shown in table 1.
TABLE 1 mechanical Properties of the products of examples 1 to 4
As can be seen from Table 1, the hard tin-plated substrates for bottle caps in examples 1 to 4 all had a hardness (HR30T) of not less than 68 and an elongation of not less than 5.0%. Therefore, the hard tin-plated substrate provided by the invention has the hardness and deep drawability indexes meeting the standards, and is suitable for manufacturing crown caps, screw caps and the like.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (8)
1. The hard tinned substrate for the bottle cap is characterized by comprising the following chemical components in percentage by mass: c: 0.07 to 0.10%, Mn: 0.30-0.60%, Al: 0.02-0.08%, less than or equal to 0.03% of Si, less than or equal to 0.005% of N, less than or equal to 0.02% of S, less than or equal to 0.02% of P, and the balance of Fe and other inevitable impurities;
the tensile strength of the substrate is 540-620 MPa, the yield strength is 520-600 MPa, the elongation A80 after fracture is 5-10%, and the hardness of HR30T is 72-78;
a production method of a hard tinned substrate for a bottle cap comprises the working procedures of smelting and refining, continuous casting, hot rolling, acid washing, primary cold rolling, annealing, secondary cold rolling and finishing;
in the hot rolling procedure, a U-shaped coiling mode is started in the coiling temperature layer cooling process, and the coiling temperature of the strip steel at the position 30m from the head to the tail is 20 ℃ higher; and after rolling, quickly cooling the front section at the cooling speed of 60-100 ℃/s, and controlling the ratio of water to be 1: 1.
2. The hard tin-plated substrate for bottle caps according to claim 1, wherein the microstructure of the substrate is plastic deformation ferrite + band-shaped distribution of granular cementite, and the thickness of the substrate is 0.20 to 0.50 mm.
3. The method for producing a hard tin-plated substrate for bottle caps as set forth in claim 1 or 2, wherein the method comprises the steps of smelting and refining, continuous casting, hot rolling, pickling, primary cold rolling, annealing, secondary cold rolling, finishing; in the secondary cold rolling process, the cold rolling reduction rate is 15-30%.
4. The method for producing a hard tin-plated substrate for bottle caps as set forth in claim 3, wherein the smelting and refining step comprises the steps of smelting in a converter, fully decarburizing by top-bottom combined blowing, deoxidizing, desulfurizing and alloying by LF refining, reducing the content of harmful gases N, H, N being 0.005% or less, H being 0.0005% or less by RH refining, and then performing slab casting.
5. The method for producing the hard tinned substrate for the bottle cap according to claim 3, wherein the hot rolling process is performed for 5 rough rolling passes, and the thickness of the intermediate blank is 32-40 mm; and (3) carrying out finish rolling on 7 passes, wherein the pass reduction rate is more than or equal to 10%, and the total reduction rate is more than or equal to 80%.
6. The method for producing the hard tin-plated substrate for the bottle caps as claimed in any one of claims 3 to 5, wherein the hot rolling step comprises continuous rolling at a complete recrystallization temperature range, wherein the heating temperature of a continuous casting billet before rolling is 1230 to 1270 ℃, the dwell time is 120 to 160min, and the tapping temperature is 1130 to 1150 ℃; the inlet temperature of finish rolling is 1030-1070 ℃, the finish rolling temperature is 880-910 ℃, and the coiling temperature is 580-620 ℃.
7. The method for producing a hard tin-plated substrate for a bottle cap according to any one of claims 3 to 5, wherein the reduction ratio in the primary cold rolling step is 88 to 93%.
8. The production method of the hard tinned substrate for the bottle cap according to any one of claims 3 to 5, characterized in that the annealing process adopts a full-hydrogen hood-type annealing furnace, the temperature is controlled to be 560 to 600 ℃, and the heat preservation time is 15 to 20 hours.
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| EP4206353A4 (en) * | 2020-12-16 | 2024-03-20 | Institute Of Res Of Iron And Steel Jiangsu Province/Sha Steel Co Ltd Cn | High-grade non-oriented silicon steel and production method therefor |
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| CN112176166B (en) * | 2020-09-09 | 2022-08-09 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
| CN114058946B (en) * | 2021-10-14 | 2022-12-16 | 首钢集团有限公司 | Low-anisotropy high-strength high-elongation steel substrate, tin-plated plate and preparation method of tin-plated plate |
| CN114635095B (en) * | 2022-03-23 | 2023-04-07 | 邯郸市金泰包装材料有限公司 | Tinning plate containing sunflower pattern for aerosol can bottom cover and production method thereof |
| CN114875319A (en) * | 2022-05-01 | 2022-08-09 | 江苏沙钢集团有限公司 | Tin plate for easy-open lid and production method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000233248A (en) * | 1999-02-12 | 2000-08-29 | Nippon Steel Corp | Manufacture of easy-open lid, and lid |
| CN102286688A (en) * | 2010-06-21 | 2011-12-21 | 宝山钢铁股份有限公司 | Steel for high-hardness tin plating primitive plate and manufacture method thereof |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
| JP2013119649A (en) * | 2011-12-07 | 2013-06-17 | Jfe Steel Corp | Original plate for steel sheet for can, steel sheet for can, and method for producing them |
| CN104060159A (en) * | 2014-06-26 | 2014-09-24 | 宝山钢铁股份有限公司 | Base plate of double-cold-rolled tinned plate and manufacturing method thereof, and double-cold-rolled tinned plate |
| CN106086643A (en) * | 2016-06-23 | 2016-11-09 | 宝山钢铁股份有限公司 | The uncoated tinplate base of a kind of high-strength high-elongation and secondary cold-rolling method thereof |
| CN107419172A (en) * | 2016-05-23 | 2017-12-01 | 上海梅山钢铁股份有限公司 | A kind of inexpensive cold rolling hard tin plate and its production method |
-
2018
- 2018-01-18 CN CN201810049988.9A patent/CN108396243B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000233248A (en) * | 1999-02-12 | 2000-08-29 | Nippon Steel Corp | Manufacture of easy-open lid, and lid |
| CN102286688A (en) * | 2010-06-21 | 2011-12-21 | 宝山钢铁股份有限公司 | Steel for high-hardness tin plating primitive plate and manufacture method thereof |
| CN102766800A (en) * | 2011-05-05 | 2012-11-07 | 上海梅山钢铁股份有限公司 | Steel for hard tinplate bottle caps and production method thereof |
| JP2013119649A (en) * | 2011-12-07 | 2013-06-17 | Jfe Steel Corp | Original plate for steel sheet for can, steel sheet for can, and method for producing them |
| CN104060159A (en) * | 2014-06-26 | 2014-09-24 | 宝山钢铁股份有限公司 | Base plate of double-cold-rolled tinned plate and manufacturing method thereof, and double-cold-rolled tinned plate |
| CN107419172A (en) * | 2016-05-23 | 2017-12-01 | 上海梅山钢铁股份有限公司 | A kind of inexpensive cold rolling hard tin plate and its production method |
| CN106086643A (en) * | 2016-06-23 | 2016-11-09 | 宝山钢铁股份有限公司 | The uncoated tinplate base of a kind of high-strength high-elongation and secondary cold-rolling method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4206353A4 (en) * | 2020-12-16 | 2024-03-20 | Institute Of Res Of Iron And Steel Jiangsu Province/Sha Steel Co Ltd Cn | High-grade non-oriented silicon steel and production method therefor |
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