WO2002055752A1 - Materiau pour la grille d'ouverture d'un tube cathodique en couleurs, procede de production de ce dernier, grille d'ouverture et tube cathodique - Google Patents

Materiau pour la grille d'ouverture d'un tube cathodique en couleurs, procede de production de ce dernier, grille d'ouverture et tube cathodique Download PDF

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Publication number
WO2002055752A1
WO2002055752A1 PCT/JP2002/000069 JP0200069W WO02055752A1 WO 2002055752 A1 WO2002055752 A1 WO 2002055752A1 JP 0200069 W JP0200069 W JP 0200069W WO 02055752 A1 WO02055752 A1 WO 02055752A1
Authority
WO
WIPO (PCT)
Prior art keywords
picture tube
weight
color picture
aperture
aperture grill
Prior art date
Application number
PCT/JP2002/000069
Other languages
English (en)
Japanese (ja)
Inventor
Hironao Okayama
Tsuneyuki Ide
Yasuo Tahara
Susumu Shigemasa
Yoshikazu Maruhashi
Original Assignee
Toyo Kohan Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kohan Co., Ltd. filed Critical Toyo Kohan Co., Ltd.
Publication of WO2002055752A1 publication Critical patent/WO2002055752A1/fr

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Classifications

    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0733—Aperture plate characterised by the material

Definitions

  • the present invention relates to a material for an aperture grill for a color picture tube, a method for producing the same, an aperture jararyl, and a color picture tube incorporating the same.
  • the aperture grille used for color picture tubes is welded to the frame with a large tension applied during manufacture, so the material for the aperture grille for color picture tubes has a tensile strength of at least 588 MPa. Is required. For this reason, low-carbon steel sheets that have been hardened and reinforced are used as the currently used materials for the aperture and grill for color picture tubes.
  • a heat treatment for blackening is performed, but the tapes constituting the aperture grille after blackening are kept in tension without being loosened.
  • the heat treatment is carried out at a temperature of 450 ° C, which is lower than the recrystallization temperature of steel, for a short time of about 15 minutes.
  • the recovery phenomenon cannot be avoided, and the recovery causes the tape to elongate, causing the tape to twist or break.
  • the color picture tube is composed of an electron gun and a fluorescent screen that converts the electron beam into an image.
  • the inside of the picture tube is covered with a magnetic shielding material to prevent the electron beam from being deflected by geomagnetism. .
  • the aperture grille must also have the function of this magnetic shielding material, and the magnetic flux density (BrJ is large and the coercive force (H e) is small as the magnetic properties, that is, the magnetic flux density Materials with a large coercivity ratio (BrZHc) are required, but low-carbon materials that are hard-worked to obtain high yield strength as described above and that are subjected to blackening heat treatment at a temperature lower than the recrystallization temperature are used.
  • the magnetic flux density is as small as 0.8 Tesla (T) or less, and the coercive force is as large as about 400 AZm. Therefore, Br (T) / He (A / m) is about 0.00. 2, small and inferior as a magnetic shielding material.
  • An object of the present invention is to provide a material for an aperture grille for a color picture tube, which has excellent tensile strength and high-temperature creep strength, and also has better magnetic properties than existing materials, and a method for producing the same. Disclosure of the invention
  • the invention according to claim 1 is characterized in that Cu is 0.05 to 2.5% by weight and Nb is 0.01 to 0.1%.
  • the invention according to claim 2 which relates to a method for manufacturing the above-mentioned material for an aperture and a grill for a color picture tube, comprises a step of cold-rolling a low-carbon hot-rolled steel strip containing 0.05 to 2.5% by weight of copper and 0.001 to 0.5% by weight of copper. After rolling, it is characterized by aging at a temperature of 300 to 700 ° C.
  • the invention according to claim 3, which relates to another method for producing the aperture grille material for a color picture tube, relates to a method for producing an aperture grille material for a color picture tube, wherein 11 is 0.05 to 2.5% by weight and Nb is 0.001 to 0.001%.
  • the aperture grill according to the invention of claim 4 is characterized by being made of a low carbon steel sheet containing 0.05 to 2.5% by weight of Cu and 0.00 :! to 0.5% by weight of Nb.
  • the color picture tube according to the invention of claim 5 is characterized by incorporating an aperturedaryl for a color picture tube containing 0.05% to 2.5% by weight of Nb and 0.001% to 0.5% by weight of Nb. .
  • a fine Cu phase ( ⁇ phase) on the order of nanometers (nm) is precipitated by aging treatment in an ultra-low carbon steel to which Cu is added, and Nb is added by adding Nb. It is considered that the tensile strength of 588MPa or more could be secured by using precipitation strengthening together. Furthermore, Br (T) / He (A / m) became 0.0025 or more by annealing by aging treatment, and it was found that excellent magnetic properties were obtained.
  • the ultra-low carbon steel used as the material of the aperture grille for the color picture tube of the present invention is decarburized and denitrified using a vacuum degassing method to reduce carbides and nitrides in the steel, It is preferable that the growth of crystal grains is promoted in the steps of rolling or hot rolling and continuous annealing. Furthermore, carbides and nitrides finely dispersed in steel hinder domain wall movement and degrade magnetic properties. Therefore, it is necessary to limit the elements contained in steel in advance and reduce them as much as possible. First, the elements added to the steel used for the material of the aperture grille for a color picture tube of the present invention and the limitation of the amount added will be described.
  • the upper limit of the amount of C added is limited to 0.01% by weight.
  • the lower limit is preferable as long as it can be practically reduced by vacuum degassing.
  • Mn must be added to combine with S in steel to fix S contained in steel as MnS and prevent hot brittleness. In order to improve the characteristics, it is preferable that the amount of added kashi is smaller, and the addition amount is 0.5% by weight or less.
  • the addition amount should be 0.3% by weight or less.
  • S is preferably small from the viewpoint of crystal grain growth, and the addition amount is preferably 0.05% by weight or less.
  • N is preferably added in an amount of 0.05% by weight or less.
  • the addition amount increases, the precipitation amount of the ⁇ phase in the aging treatment increases, and the yield strength and creep strength increase significantly.
  • the ⁇ phase is a fine precipitate of the order of nanometers, unlike a precipitate on the order of microns, it hardly hinders the movement of the domain wall, and the degree of deterioration of the magnetic properties is extremely small. Therefore, by increasing the amount of Cu added, the yield strength and the creep strength can be increased without deteriorating the magnetic properties. However, if the amount is less than 0.05% by weight, a sufficient effect of increasing the strength cannot be obtained. On the other hand, if the addition amount is too large, the amount of precipitates becomes large and the magnetic properties deteriorate, so the addition amount is less than 2.5% by weight. Preferably.
  • Nb is effective in increasing the strength by reacting with carbon in the steel to form precipitates of NbC, and the addition of Nb greatly increases the tensile strength and creep strength.
  • Nb C precipitation strengthening by Nb can be used in addition to strengthening based on aging precipitation by adding Cu. Sufficient strength can be obtained with an addition amount of 0.001% by weight or more, but if the addition amount exceeds 0.5%, mixed grains due to segregation will occur, so 0.5% by weight or less And the amount added.
  • ultra-low carbon steel containing the above-mentioned chemical components produced by vacuum melting or vacuum degassing is hot-rolled, it is pickled to remove an oxide film formed in the hot-rolling process. Subsequently, it is cold-rolled to a thickness of 0.035 to 0.2 mm.
  • aging is performed at a temperature of 300 to 700 ° C for 10 seconds to 20 hours. If the added amount of Cu and Nb is large, the recrystallization temperature rises, so it is acceptable to perform aging treatment at around the upper limit of 700 ° C. Considering the particle size of the aging, it is preferable to perform aging treatment at a temperature of 450 to 650 ° C.
  • the aging temperature is less than 300 ° C, the ⁇ phase will not be sufficiently precipitated, and the required tensile strength cannot be obtained.
  • the ⁇ phase re-dissolves in the steel and the tensile yield strength decreases.
  • a box annealing furnace or a continuous annealing furnace may be used depending on the heating temperature and the heating time.
  • the above ultra-low carbon steel is hot-rolled, pickled, and cold-rolled to a thickness of 0.1 to 0.6111111.
  • secondary cold rolling may be performed to a final thickness of 0.035 to 0.2 mm, and then the above aging treatment may be performed. If the annealing temperature is lower than 500 ° C, the softening becomes insufficient.If the above aging treatment is performed after secondary cold rolling, the tensile strength becomes extremely high.On the other hand, if the annealing temperature exceeds 900 ° C, After the next cold rolling Does not provide the desired tensile strength.
  • a slab produced by vacuum degassing one type of low-carbon steel (A to K) having the chemical composition shown in Table 1 was hot-rolled into a hot-rolled sheet of 2.5 mm. These hot-rolled sheets were pickled with sulfuric acid and then cold-rolled into two types of cold-rolled sheets having a thickness of 0.1 mm and 0.3 mm. Thereafter, cold-rolled sheets (samples A to G, -I, and K2) with a thickness of 0.1 mm were directly aged under the aging conditions shown in Table 2. For cold-rolled sheets with a thickness of 0.3 mm (samples H1 to H5, J1 to J4, and K1), intermediate annealing was performed under the conditions shown in Table 2 so that the thickness became 0.1 mm. After secondary cold rolling, it was subjected to aging treatment under the conditions shown in the table. ,
  • Samples BF, H, and J are examples satisfying the component range of the material for the color picture tube aperture / grill of the present invention.
  • the test materials, I and K are comparative examples in which the added amount of Cu and the test material G were added in amounts other than the range of the present invention, respectively.
  • Samples B to C, E2 to E4, and F are examples of a material for an aperture grille for a color picture tube manufactured by the manufacturing method according to Claim 2
  • Samples H2 to H5 and J 1 to J4 are examples of a material for an aperture grille for a picture tube manufactured by the manufacturing method according to claim 3.
  • Samples A, E1, E5, G, Hl, I, Kl, and K2 are comparative examples.
  • Each of the test materials obtained in this manner as the material for the aperture picture tube for the color picture tube of the example and the comparative example was applied to a magnetic field of 796 A / m using a simple Epstein-type magnetometer. Then, the magnetic flux density and coercive force were measured, and B r (T) / He (A / m) was determined. B r (T) / ⁇ c (A / m) of 0.0025 or more was determined to be good. In addition, the tensile strength was measured using Tensilon, and a value of 588 MPa or more was determined as good.
  • the materials for the aperture and grill for the color picture tube according to the embodiment of the present invention all have Br / Hc values of 0.0025 Tm / A or more, and have excellent magnetic properties. It has excellent tensile strength and creep elongation of 0.3% or less, and has excellent tensile strength and high-temperature creep strength. It can be seen that the material has excellent properties. Therefore, by manufacturing the aperture grille from the material for the aperture grille for the color picture tube of the present embodiment, the tapes constituting the aperture grille after blackening are maintained in tension without loosening. Thus, it is possible to obtain an aperture and a grill for a color picture tube which can hold the image.
  • the color picture tube incorporating the aperture grille prevents the electron beam from being deflected by geomagnetism and can obtain a clear color image without distortion.
  • the material for the aperture grill of claim 1 is made of a low-carbon steel sheet containing 0.05 to 2.5% by weight of Cu and 0.001 to 0.5% by weight of Nb, so that it has excellent magnetic properties and strength. have.
  • the aperture for a color picture tube having excellent tensile strength, excellent high-temperature creep strength, and excellent magnetic properties.
  • Yardaryl materials can be manufactured.
  • each tape constituting the aperture daryl is not loosened.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

La présente invention concerne un matériau pour la grille d'ouverture d'un tube cathodique en couleurs qui présente une limite d'élasticité et une résistance au fluage excellentes et de meilleures caractéristiques magnétiques que celles des matériaux actuellement disponibles; un procédé de production de ce dernier; et une grille d'ouverture ainsi qu'un tube cathodique comprenant cette grille d'ouverture. Le procédé de production consiste à laminer à froid une plaque d'acier à faible teneur en carbone qui renferme de 0,05 à 2,5 % en poids de Cu et de 0,001 à 0,5 % en poids de Nb, à traiter ensuite la plaque d'acier laminée à une température comprise entre 300 et 700 °C ou bien à laminer à froid cette dernière, puis à effectuer un recuit intermédiaire du produit résultant à une température comprise entre 500 et 900 °C avant de procéder à un deuxième laminage à froid, et enfin à faire vieillir le produit résultant.
PCT/JP2002/000069 2001-01-15 2002-01-10 Materiau pour la grille d'ouverture d'un tube cathodique en couleurs, procede de production de ce dernier, grille d'ouverture et tube cathodique WO2002055752A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-6429 2001-01-15
JP2001006429A JP2002212678A (ja) 2001-01-15 2001-01-15 カラー受像管用アパーチャーグリル用素材、その製造方法、アパーチャーグリル及び受像管

Publications (1)

Publication Number Publication Date
WO2002055752A1 true WO2002055752A1 (fr) 2002-07-18

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PCT/JP2002/000069 WO2002055752A1 (fr) 2001-01-15 2002-01-10 Materiau pour la grille d'ouverture d'un tube cathodique en couleurs, procede de production de ce dernier, grille d'ouverture et tube cathodique

Country Status (2)

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JP (1) JP2002212678A (fr)
WO (1) WO2002055752A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05311327A (ja) * 1992-04-02 1993-11-22 Nkk Corp アパーチャグリル用素材及びその製造方法
JPH0867945A (ja) * 1994-08-26 1996-03-12 Nisshin Steel Co Ltd アパーチャーフレーム用鋼板およびその製造方法
JPH1192886A (ja) * 1997-09-19 1999-04-06 Nippon Steel Corp Ｔｖブラウン管用磁気シールド鋼板およびその製造方法
JP2001316768A (ja) * 2000-03-01 2001-11-16 Nkk Corp カラー陰極線管用磁気シールド鋼板およびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05311327A (ja) * 1992-04-02 1993-11-22 Nkk Corp アパーチャグリル用素材及びその製造方法
JPH0867945A (ja) * 1994-08-26 1996-03-12 Nisshin Steel Co Ltd アパーチャーフレーム用鋼板およびその製造方法
JPH1192886A (ja) * 1997-09-19 1999-04-06 Nippon Steel Corp Ｔｖブラウン管用磁気シールド鋼板およびその製造方法
JP2001316768A (ja) * 2000-03-01 2001-11-16 Nkk Corp カラー陰極線管用磁気シールド鋼板およびその製造方法

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