WO2004092433A1 - ブラウン管バンド用高強度高透磁率鋼板およびその製造法 - Google Patents
ブラウン管バンド用高強度高透磁率鋼板およびその製造法 Download PDFInfo
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- WO2004092433A1 WO2004092433A1 PCT/JP2004/005207 JP2004005207W WO2004092433A1 WO 2004092433 A1 WO2004092433 A1 WO 2004092433A1 JP 2004005207 W JP2004005207 W JP 2004005207W WO 2004092433 A1 WO2004092433 A1 WO 2004092433A1
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- Prior art keywords
- less
- annealing
- steel sheet
- rolling
- cold rolling
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 230000035699 permeability Effects 0.000 title claims abstract description 26
- 238000000137 annealing Methods 0.000 claims abstract description 60
- 238000005098 hot rolling Methods 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 230000009467 reduction Effects 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims description 37
- 238000005097 cold rolling Methods 0.000 claims description 34
- 239000013078 crystal Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000001953 recrystallisation Methods 0.000 claims description 9
- 238000009713 electroplating Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 239000006104 solid solution Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000002542 deteriorative effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
- Y10T428/12757—Fe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
Definitions
- the present invention relates to a high-strength steel sheet having good geomagnetic shielding properties used for a cathode ray tube band for fastening around a panel portion of a cathode ray tube (cathode ray tube) incorporated in a television, office automation equipment, and the like, and a method for producing the same.
- Background art
- the outer periphery of the panel is fastened with steel bands to prevent concave deformation of the front panel and explosion, and to prevent the panel glass from scattering at the time of explosion.
- a soft magnetic, high-strength plated steel sheet having a thickness of about 0.8 to 2.0 mm is used.
- the band material Due to the tightening force, the shape of the front surface of the panel, which is concavely deformed due to the high vacuum inside the tube, is correctly corrected.
- the band material has a function as a “geomagnetic shield material” that uses its soft magnetism to prevent geomagnetism from entering the cathode ray tube. Therefore, the bran tube band material is required to have high strength and high magnetic permeability in a weak DC magnetic field such as geomagnetism. In particular, as high strength properties, those which can stably obtain a yield stress of 300 N / mm 2 or more are desired.
- high strength and high permeability of steel are contradictory characteristics.
- precipitation strengthening by the addition of Ti, Nb, etc. which are effective means for increasing the strength of steel sheets, strengthening by reducing the crystal grain size of the fly, and rolling by imparting processing strain
- Patent Document 1 JP-A-10-208670
- Patent Document 2 JP-A-10-214578
- Patent Document 3 JP-A-11-140601
- Patent Document 4 JP-A-11-293397
- Patent Document 5 JP 2000-290759 A
- Patent Document 6 JP 2001-040417 A
- Patent Document 7 JP 2001-040418 A
- Patent Document 8 JP 2001-040419 A
- Patent Documents 1 and 2 disclose a method for manufacturing a CRT band using a cold-rolled steel sheet having a C force of 0.05% or less, that is, a so-called ⁇ silicon steel sheet, '' in which Si is added at 1% or more. ing.
- the material property required for improving the geomagnetic shielding properties is the magnetic permeability in a weak DC magnetic field, so that low iron loss in the alternating magnetic field, which is a characteristic of silicon steel sheets, is not required.
- the addition of a large amount of Si under the condition of extremely low carbon with C ⁇ 0.005% raises the cost of steelmaking and, at the same time, significantly reduces the toughness and ductility of the steel material, resulting in hot rolling and cold rolling. In this case, cracking is likely to occur and productivity is poor.
- so-called temper color is liable to be generated due to oxidation of Si on the surface layer, which causes a decrease in plating adhesion o
- Patent Document 3 discloses the application of Ti-added steel.
- Ti-added steel has a high recrystallization temperature and leads to an increase in manufacturing costs.
- fine precipitated carbonitrides directly hinder the movement of the domain wall, and also reduce the size of the crystallites of the fly, lowering the magnetic permeability.
- Patent Document 4 discloses a technique in which the strength is enhanced by positively utilizing the strain caused by the addition of P and temper rolling, and the low-field magnetic properties are improved by controlling the balance between the crystal grain size and the temper rolling.
- Patent Literature 5 discloses a technique in which magnetic properties are improved and steel is strengthened based on the addition of Si and Mn.
- Patent Documents 6 to 9 use age hardening by solid solution C to increase the strength and control the precipitation morphology and size of cementite and the size of the fly crystal to reduce ultra-low carbon and reduce Si. There is disclosed one that achieves both high strength and high magnetic permeability without requiring a large amount of addition. According to the studies by the inventors, it has been found that the disclosed methods do not always provide a high yield stress of 300 N / mm 2 or more stably. . Purpose of the invention
- the present invention provides a steel sheet for a cathode ray tube band aimed at strengthening the high permeability of without using a precipitation strengthening element such as addition of a large amount and T i of S i, in particular, 3 0 0 N / mm 2 or more
- a precipitation strengthening element such as addition of a large amount and T i of S i, in particular, 3 0 0 N / mm 2 or more
- the purpose is to provide a technology that can stably realize high yield stress. Disclosure of the invention
- the present inventors have studied in detail the means for achieving stable high strength without deteriorating the magnetic properties. Found to be effective. Further, by appropriately containing C and Si, it is possible to further improve the strength, and it is possible to prevent the cost rise due to the extremely low C and the deterioration of the adhesion due to the high Si. Furthermore, it has been confirmed that by strictly controlling the crystal grain size of the fly, it is possible to achieve stable high strength without hindering high permeability. The present invention has been completed based on these findings.
- the balance has a chemical composition consisting of Fe and unavoidable impurities, and the crystal grain size of the fly is 10 to 100m, yielding
- the diameter of the fly crystal means the average particle diameter. Therefore, crystal grains having a particle size of less than 10 m or more than 100 / m may be present in the fly structure.
- C 0.003 to 0.010%
- Si 0.5 to 1.0%
- Mn 1.0 to 2.0%
- P 0.04-0.15%
- S 0.02% or less
- N 0.04% or less
- the remainder is Fe and inevitable consists impurities, and has a chemical composition satisfies the following formula (1)
- Fuwerai preparative crystal grain size is the 1 0 to 1 0 0 / zm
- CRT band yield stress is 3 0 0 N / mm 2 or more
- the C content can exceed 0.005% to 0.010%, and the relative magnetic permeability 0.35 in a DC magnetic field of 0.350e (Elsted) is 400%.
- the steel sheet can have a Zn-based or A1-based plating layer on its surface.
- Zn-based plating means that at least 50% by mass or more of Zn is in the composition of the plating layer.
- A1-based plating is at least 5% in the composition of the plating layer. It means that 0 mass% or more is A1.
- the steel sheet when the steel sheet is manufactured by performing cold rolling and annealing once or more times after hot rolling, (1)
- the winding temperature in hot rolling should be 600 to 700 ° C,
- final cold rolling rate and “final annealing temperature” mean the cold rolling rate and annealing temperature in the case of a manufacturing process in which cold rolling and annealing are performed once. In the case of a manufacturing process in which annealing is performed a plurality of times, it means the cold rolling reduction and the annealing temperature in the final round.
- the recrystallization characteristics of the steel refer to the relationship between the cold rolling reduction and the annealing temperature, which affect the crystal grain size after annealing, which is determined in advance for the steel to be manufactured.
- Plating can be performed after the final annealing in the above-mentioned manufacturing method. In that case, the following process (a) or (b) can be adopted.
- the final annealing is followed by immersion in the fusion plating bath. Therefore, the crystal grain size of the plated metal is adjusted to be 10 to 10.
- C is effective for increasing the strength of the steel. If the C content is less than 0.003% by mass, sufficient strengthening ability cannot be obtained, and such a low C content unnecessarily increases the load in steelmaking, so that it is not preferable in the present invention. On the other hand, if the C content exceeds 0.010% by mass, deterioration of magnetic properties becomes a problem. For this reason, in the present invention, the C content is specified to be 0.003 to 0.010 mass%. A particularly desirable C content range is more than 0.005 to 0.010% by mass.
- Si contributes to high strength as a solid solution strengthening element. 0.5% by mass or more is required to exert its effect sufficiently. However, since a large amount of Si content deteriorates workability and adhesion, the upper limit is set to 1.0% by mass.
- Mn contributes to high strength as a solid solution strengthening element, and is more advantageous than Si addition from the viewpoint of plating adhesion. Therefore, in the present invention, the strengthening action is positively utilized by adding 1.0% by mass or more of Mn. However, care must be taken if the content exceeds 2.0% by mass, because the workability will deteriorate and the plating adhesion will also deteriorate.
- P contributes to increasing the strength as a solid solution strengthening element, but it is deflected to the grain boundaries in the steel, resulting in the adverse effect of deteriorating the manufacturability and the toughness of the steel.
- P is positively set in the range of 0.04 to 0.15 mass%. To increase the strength.
- S is present in steel sheets as inclusions and degrades bending workability and magnetic properties, so it must be reduced to 0.02 mass% or less.
- A1 can be added as needed as a deoxidizing agent. However, if a large amount of A 1 N is formed in the steel sheet, the magnetic properties are deteriorated. Therefore, the content should be 0.030 mass% or less.
- N is present in the steel sheet as a precipitate such as A 1 N and degrades the magnetic properties, it should be reduced to 0.004% by mass or less in the present invention.
- a high yield stress of 300 N / mm 2 can be stably realized by adjusting the crystal grain size as described below.
- Ox 10_ 4 is a Mitasuko more preferred.
- the steel sheet of the present invention substantially exhibits a single phase structure of a light when used for a CRT band. It is known that it is generally effective to increase the crystal grain size to improve the magnetic permeability. On the other hand, steel It is also known that a smaller crystal grain size is generally more advantageous for improving the strength of steel. Therefore, it is important to adjust the crystal grain size to satisfy both magnetic properties and strength. Regarding magnetic properties, if a band material with a characteristic of “relative permeability ⁇ 0.35” in a DC magnetic field of 0.35 Oe is 400 or more, the shielding effect against geomagnetism will be sufficient. It is. On the other hand, as for strength, a yield stress of 300 N / mm 2 or more is required as described above.
- the present inventors have studied in detail a steel sheet having the above composition, and found that these properties can be satisfied when the grain size of the graphite is adjusted to the range of 100 to 100 m.
- “0.35” can be increased to 400 or more by increasing the ferrite crystal grain size to 10 ⁇ m or more, and 300 N / m to 100 ⁇ m or less.
- a yield stress of mm 2 or more is obtained.
- the more preferable lower limit of the size of the fly crystal is 15 m.
- the crystal grain size can be controlled by adjusting the winding temperature in hot rolling, as described below, and by an appropriate combination of the cold rolling reduction and the final annealing temperature.
- the steel sheet of the present invention is desirably used in a state where Zn-based plating or A1-based plating has been applied.
- the plating method There is no particular limitation on the plating method, and any of melting plating and electric plating may be used as long as the above crystal grain size is finally obtained.
- Zn plating, A1 plating, Zn—4 to; 13% A1—1 to 4% Mg plating, etc. can be adopted.
- electric plating Zn plating, Zn—10 ⁇ 16% Ni plating etc. can be adopted.
- a general steel sheet manufacturing line can be used for manufacturing the steel sheet of the present invention, and no special process is required. That is, after the steel is melted, hot rolling, cold rolling, annealing, and, if necessary, temper rolling can be performed. Cold rolling and annealing can be repeated one or more times depending on the desired sheet thickness.
- manufacturing conditions must be devised in order to control the crystal grain size in the range of 100 to 100 ⁇ m.
- the winding temperature after hot rolling must be 600 ° C. or higher. This is because the A 1 N precipitation is sufficiently advanced in advance during winding to grow the A 1 N particles.
- the winding temperature after hot rolling is set to 600 to 700 ° C.
- a 1 N is sufficiently deposited and grown in advance. Then, by appropriately combining the “rolling ratio” of the final cold rolling with the “temperature” of the final annealing, the final control of the fine grain size in the range of 100 to 100 ⁇ m is achieved. I do.
- the rolling ratio of the final cold rolling is preferably set to 10% or more so that recrystallization easily occurs in subsequent annealing.
- the final annealing temperature is in the range of 750 to 900 ° C. If the temperature is lower than 750 ° C, recrystallization may not be sufficiently completed. If the temperature is higher than 900 ° C, the effect of recrystallization is saturated, and the production cost is unnecessarily increased.
- the heating and holding time in the final annealing does not need to be particularly specified, but is preferably about 15 to 120 seconds.
- An appropriate combination of the final cold rolling rate and the final annealing temperature can be easily determined by conducting a test and examining the relationship between the cold rolling rate and the annealing temperature on the grain size after annealing and graphing the results. You can know.
- ⁇ inline plating '' can be performed using a continuous line in which the annealing equipment and plating equipment are integrated.
- the annealing before plating needs to be the “final annealing” specified in the present invention. That is, in the annealing equipment of the continuous melting line, the final annealing is performed at an appropriate temperature in the range of 750 to 900 ° C.
- a method can be adopted in which the steel sheet is immersed in a melting plating bath to perform plating.
- electrical Zn-based plating it is usually done on a separate line after the final annealing.
- the electroplating may be performed after the temper rolling described below, or may be performed before the temper rolling.
- the temper rolling reduction should be 1.5% or less, since the magnetic properties deteriorate if excessive strain is applied. If the temper rolling reduction is 1.5% or less, it can be seen that the grain size of the graphite does not substantially change before and after the temper rolling.
- a slab having the chemical composition shown in Table 1 was hot-rolled to a thickness of 2.3 mm under the conditions of a hot rolling finish temperature of 920 ° C and a winding temperature of 650 ° C. mm. Thereafter, continuous annealing (final annealing) was performed at 85 Q ° C. Temper rolling is not applied.
- the ferrite crystal grain size was measured by a cutting method according to JIS G 0552 on a cross section including the rolling direction and the thickness direction of the steel sheet.
- the yield stress was determined from a stress-strain curve obtained by conducting a tensile test using a JIS No. 5 tensile test piece cut out in the rolling direction.
- Table 2 shows the results. Table 2 Blow welding Yield Relative permeability
- the winding crystal temperature, the combination of the cold rolling ratio and the annealing temperature, and the temper rolling ratio were all set to appropriate conditions, so that the crystal grain size of the fly was within an appropriate range.
- a high yield strength of at least 400 N / mm 2 and a high relative magnetic permeability of / 400 or more were obtained.
- sufficient shielding against geomagnetism can be achieved without adding a large amount of Si or adding a precipitation strengthening element such as Ti, and using ordinary steel plate manufacturing equipment. and has a gender, production of high-strength "high-permeability steel sheet exhibiting stable 3 0 0 N / mm 2 higher than the yield stress becomes possible. Therefore, the steel sheet according to the present invention is extremely useful as a steel sheet used for a recent cathode ray tube band, which is required to have higher reliability as the cathode ray tube becomes thinner.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Electroplating Methods And Accessories (AREA)
- Coating With Molten Metal (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/552,350 US7501029B2 (en) | 2003-04-15 | 2004-04-12 | High-strength, high-permeability steel sheet for picture tube band and method of producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003/110771 | 2003-04-15 | ||
JP2003110771A JP2004315883A (ja) | 2003-04-15 | 2003-04-15 | ブラウン管バンド用高強度高透磁率鋼板およびその製造法 |
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WO2004092433A1 true WO2004092433A1 (ja) | 2004-10-28 |
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PCT/JP2004/005207 WO2004092433A1 (ja) | 2003-04-15 | 2004-04-12 | ブラウン管バンド用高強度高透磁率鋼板およびその製造法 |
Country Status (5)
Country | Link |
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US (1) | US7501029B2 (ja) |
JP (1) | JP2004315883A (ja) |
KR (1) | KR20060008892A (ja) |
CN (1) | CN1756854A (ja) |
WO (1) | WO2004092433A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7968210B2 (en) | 2005-02-10 | 2011-06-28 | Nippon Steel Corporation | Aluminum type plated steel sheet and heat shrink band using the same |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5121225B2 (ja) * | 2006-12-27 | 2013-01-16 | 日新製鋼株式会社 | 磁気シールド性に優れたスポット溶接用高強度めっき鋼板の製造方法 |
MX2009008557A (es) | 2007-02-23 | 2009-08-21 | Corus Staal Bv | Metodo para conformacion termomecanica de un producto final con una tenacidad muy alta y producto elaborado por el mismo. |
WO2008104610A1 (en) * | 2007-07-19 | 2008-09-04 | Corus Staal Bv | Method for annealing a strip of steel having a variable thickness in length direction |
US20100304174A1 (en) * | 2007-07-19 | 2010-12-02 | Corus Staal Bv | Strip of steel having a variable thickness in length direction |
EP2025771A1 (en) * | 2007-08-15 | 2009-02-18 | Corus Staal BV | Method for producing a coated steel strip for producing taylored blanks suitable for thermomechanical shaping, strip thus produced, and use of such a coated strip |
JP5668460B2 (ja) * | 2010-12-22 | 2015-02-12 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
KR101829854B1 (ko) * | 2011-04-01 | 2018-02-20 | 신닛테츠스미킨 카부시키카이샤 | 도장 후 내식성이 우수한 핫 스탬핑 성형된 고강도 부품 및 그 제조 방법 |
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JP2000038644A (ja) * | 1998-07-21 | 2000-02-08 | Nippon Steel Corp | 腐食しにくく地磁気シールド性に優れた高強度冷延鋼板とその製造方法 |
JP2000290759A (ja) * | 1998-03-16 | 2000-10-17 | Nippon Steel Corp | 地磁気シールド性とめっき密着性に優れた高強度電気めっき用原板及び電気めっき鋼板とその製造方法 |
JP2001040420A (ja) * | 1999-07-28 | 2001-02-13 | Nisshin Steel Co Ltd | 透磁率の良いブラウン管バンド用時効硬化鋼板の製造方法 |
JP2002012956A (ja) * | 1997-11-05 | 2002-01-15 | Nippon Steel Corp | 地磁気シールド特性に優れる高強度冷延鋼板および高強度めっき鋼板とその製造方法 |
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JP3987888B2 (ja) | 1997-01-29 | 2007-10-10 | ソニー株式会社 | ヒートシュリンクバンド用鋼板及びその製造方法並びにヒートシュリンクバンド及びこれを備えた陰極線管装置 |
JPH10214578A (ja) | 1997-01-29 | 1998-08-11 | Sony Corp | ヒートシュリンクバンド |
JP3692222B2 (ja) | 1997-11-05 | 2005-09-07 | 新日本製鐵株式会社 | 地磁気シールド特性の良好な高強度冷延鋼板および高強度めっき鋼板とその製造方法 |
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JPH11293397A (ja) | 1998-04-15 | 1999-10-26 | Nippon Steel Corp | Tvブラウン管シュリンクバンド用冷延鋼板およびその製造方法 |
JP2001040419A (ja) | 1999-07-28 | 2001-02-13 | Nisshin Steel Co Ltd | 透磁率の良いブラウン管バンド用高強度鋼板の製造方法 |
JP2001040418A (ja) | 1999-07-28 | 2001-02-13 | Nisshin Steel Co Ltd | 高透磁率ブラウン管バンド用時効硬化鋼板の製造方法 |
JP2001040417A (ja) | 1999-07-28 | 2001-02-13 | Nisshin Steel Co Ltd | 高透磁率ブラウン管バンド用高強度鋼板の製造方法 |
JP3744808B2 (ja) | 2001-03-28 | 2006-02-15 | セイコーエプソン株式会社 | 画像処理装置、画像処理方法、プログラムおよび記録媒体 |
KR20050009277A (ko) * | 2003-01-06 | 2005-01-24 | 제이에프이 스틸 가부시키가이샤 | 고강도 방폭밴드용 강판 및 고강도 방폭밴드 |
-
2003
- 2003-04-15 JP JP2003110771A patent/JP2004315883A/ja active Pending
-
2004
- 2004-04-12 CN CNA2004800061315A patent/CN1756854A/zh active Pending
- 2004-04-12 WO PCT/JP2004/005207 patent/WO2004092433A1/ja active Application Filing
- 2004-04-12 US US10/552,350 patent/US7501029B2/en not_active Expired - Fee Related
- 2004-04-12 KR KR1020057019558A patent/KR20060008892A/ko not_active Application Discontinuation
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JP2002012956A (ja) * | 1997-11-05 | 2002-01-15 | Nippon Steel Corp | 地磁気シールド特性に優れる高強度冷延鋼板および高強度めっき鋼板とその製造方法 |
JP2000290759A (ja) * | 1998-03-16 | 2000-10-17 | Nippon Steel Corp | 地磁気シールド性とめっき密着性に優れた高強度電気めっき用原板及び電気めっき鋼板とその製造方法 |
JP2000038644A (ja) * | 1998-07-21 | 2000-02-08 | Nippon Steel Corp | 腐食しにくく地磁気シールド性に優れた高強度冷延鋼板とその製造方法 |
JP2001040420A (ja) * | 1999-07-28 | 2001-02-13 | Nisshin Steel Co Ltd | 透磁率の良いブラウン管バンド用時効硬化鋼板の製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US7968210B2 (en) | 2005-02-10 | 2011-06-28 | Nippon Steel Corporation | Aluminum type plated steel sheet and heat shrink band using the same |
Also Published As
Publication number | Publication date |
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US20060134452A1 (en) | 2006-06-22 |
JP2004315883A (ja) | 2004-11-11 |
KR20060008892A (ko) | 2006-01-27 |
CN1756854A (zh) | 2006-04-05 |
US7501029B2 (en) | 2009-03-10 |
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