WO2000070109A1 - Materiau pour masque perfore destine a un tube de reception d'images couleurs, son precede de production, masque perfore et tube de reception d'images - Google Patents

Materiau pour masque perfore destine a un tube de reception d'images couleurs, son precede de production, masque perfore et tube de reception d'images Download PDF

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Publication number
WO2000070109A1
WO2000070109A1 PCT/JP2000/003064 JP0003064W WO0070109A1 WO 2000070109 A1 WO2000070109 A1 WO 2000070109A1 JP 0003064 W JP0003064 W JP 0003064W WO 0070109 A1 WO0070109 A1 WO 0070109A1
Authority
WO
WIPO (PCT)
Prior art keywords
shadow mask
weight
picture tube
color picture
content
Prior art date
Application number
PCT/JP2000/003064
Other languages
English (en)
Japanese (ja)
Inventor
Tsuneyuki Ide
Takahiko Miyazaki
Susumu Shigemasa
Yasuo Tahara
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.
Priority to AU44325/00A priority Critical patent/AU4432500A/en
Publication of WO2000070109A1 publication Critical patent/WO2000070109A1/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
    • C22C38/004—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
    • C22C38/001—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
    • 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
    • C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
    • 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 a shadow mask for a color picture tube, a shadow mask, and a color picture tube incorporating the same. More specifically, the present invention relates to a material for a shadow mask for a color picture tube having excellent tensile strength and high-temperature creep strength, a shadow mask, and a color picture tube incorporating the same. Background art
  • a so-called curved surface (dome type) cathode ray tube in which a shadow mask having a slightly curved mask surface is welded to a frame, has been used as a shadow mask type color picture tube. Since the shadow mask material used in such a conventional method is formed into a dome shape, emphasis has been placed on press formability and shape freezing properties for maintaining the shape at the time of pressing.
  • This curved surface CRT has a problem that eyes are easily fatigued due to irregular reflection of external light rays in the lighting building. Therefore, flattening of the CRT has been desired.
  • the flat surface may not be achieved on the slightly curved mask surface used in the conventional cathode-ray tube.
  • An object of the present invention is to provide a color tube capable of coping with the above-mentioned complete flat surface CRT It is an object of the present invention to provide a picture tube, and further to provide a color picture tube having excellent tensile strength and high temperature creep strength. Disclosure of the invention
  • the material for a shadow mask for a color picture tube according to the present invention contains 0.0005 to 0.03% by weight of C, 0.05 to 0.5% by weight of Mn, and 0.005 to 0.5% by weight of A1. Characterized by a low carbon aluminum killed alloy steel sheet.
  • the material desirably contains at least one or more elements selected from Ni, Cu, Cr, Mo, Co, and W, and the content of each element is 0.005 to 1. % Is desirable.
  • the material preferably contains at least one element selected from the group consisting of B, Ti, Nb, V, Ta, Zr, and Hf, and the content of each element is 0.0001 to 0.3 weight. % Is desirable.
  • a shadow mask for a color picture tube according to the present invention uses the shadow
  • a color picture tube according to the present invention is characterized by incorporating the shadow mask.
  • the color picture tube according to the present invention is characterized in that the shadow mask is attached to a frame in a state where tension is applied in a vertical direction.
  • the color picture tube according to the present invention is characterized in that the shadow mask is attached to a frame in a state where tension is applied in vertical and horizontal directions.
  • the tension in the left-right direction is desirably smaller than the tension in the vertical direction.
  • the shadow mask of the present invention is characterized in that the elongation at the time of applying the applied stress of 20 kgf Zmm 2 and holding at 450 ix 60 minutes is 0.3% or less. 2
  • the shadow mask of the present invention is fixed (for example, welded) to the frame in a state where a large tension is applied in the vertical direction as a result of adjusting the components contained in the shadow mask material.
  • the shadow mask of the present invention is fixed to the frame in a state where a slight tension which is not less than 0 is applied in the horizontal direction of the frame as compared with the vertical direction.
  • the shadow mask material of the present invention even in a heat treatment step called a so-called blackening treatment, even after the heat treatment is performed while tension is applied to the shadow mask, the shadow mask itself becomes loose and wrinkled. It has sufficient high-temperature criff 'strength to maintain a state that does not occur.
  • the low-carbon aluminum killed alloy steel used as the shadow mask material of the present invention a low-carbon aluminum-killed alloy steel that has been subjected to decarburization and denitrification using a vacuum degassing method to reduce carbides and nitrides in the steel and is preferably hot-rolled.
  • the upper limit is preferably set to 0.03% by weight. More preferably, the content is 0.028% by weight or less, and further preferably, the content is 0.025% by weight or less.
  • OCA open coil annealing
  • the content of ⁇ is preferably set.
  • the content is more preferably at least 0.006% by weight, and even more preferably at least 0.007% by weight.
  • Mn is an element that forms a solid solution in steel and increases the material hardness by solid solution hardening, so that tensile strength and creep strength are improved.
  • Mn must be added to combine with S in steel to fix S contained in steel as Mn S and prevent hot embrittlement.
  • the content is preferably 0.05% by weight or more.
  • the content is more preferably 0.06% by weight or more, and still more preferably 0.07% by weight or more.
  • the content of Mn is preferably as small as possible, and the content is preferably 0.5% by weight or less.
  • the content is more preferably 0.49% by weight or less, and even more preferably 0.47% by weight or less.
  • ID A1 is used in the steelmaking process as a deoxidizing agent, and has the effect of improving the cleanliness of steel. Furthermore, A1 has the effect of improving magnetic properties by being dissolved in steel. For this reason, the content is preferably 0.05% by weight or more. More preferably, the content is 0.06% by weight or more. More preferably, the content is 0.007% by weight or more.
  • the upper limit of the A1 content is preferably set to 1.0% by weight or less.
  • the content is more preferably 0.98% by weight or less, and even more preferably 0.96% by weight or less.
  • Ni, Cu, Cr, Mo, Co, and W are all elements that form a solid solution in steel and increase the material hardness by solid solution hardening. Further, since Cr, Mo and W combine with C in steel to form carbides and improve tensile strength and creep strength, it is preferable to add at least one or more of these elements .
  • the content of each is preferably at least 0.05% by weight. The content is more preferably 0.07% by weight or more, and even more preferably 0.09% by weight or more. On the other hand, if the content of these elements is large, carbides are formed and the magnetic properties are impaired, so that the content is preferably 1.0% by weight or less. More preferably, the content is 0.9% by weight or less, and further preferably, 0.8% by weight or less. Is the content of
  • the content is more preferably at least 0.002% by weight, and even more preferably at least 0.003% by weight.
  • the content of these elements is large, carbides or nitrides are formed and the magnetic properties are impaired. Therefore, the content is preferably not more than 0.3% by weight.
  • the content is more preferably 0.28% by weight or less, and even more preferably 0.26% by weight or less.
  • the content of the other elements is not particularly limited, but Si, S, N, etc. may be mentioned as trace elements or unavoidable impurities.
  • Si inhibits the etching property and lowers the adhesion of the blackened film
  • the smaller the contained amount the more preferable it is, and it is preferable to set the content to 0.3% by weight or less.
  • S is devoted to the crystal grain boundaries, significantly impairs the etching characteristics and causes the material to be embrittled. Therefore, it is preferable that the content of S is small, and the content should be 0.05% by weight or less. Is desirable.
  • the melted low-carbon alloy containing the above chemical components is hot-rolled and then pickled to remove an oxide film formed in the hot-rolling process. Subsequently, the sheet is cold-rolled to a sheet thickness of 0.2 to 0.6 mm. Then, after softening by annealing, finishing is performed by cold rolling to a predetermined thickness of 0.05 to 0.15 mm. Regarding the annealing treatment, either a box type annealing furnace or a continuous annealing furnace can be used.
  • a water-soluble casein resist was applied to both sides of the shadow mask material, and after drying, the resist on both sides of the material was patterned using a pair of front and back glass dry plates.
  • exposure, hardening treatment, and baking treatment are performed, and thereafter, a ferric chloride solution having a solution temperature of 60 and a specific gravity of 48 ° Be is sprayed as an etching solution on both sides of the patterned resist.
  • the etching was performed. After the etching, the resist was stripped off with an alkaline solution after washing with water, washed and dried to prepare a shadow mask.
  • the shadow mask of the present invention is mounted on a frame.
  • the shadow mask of the present invention is fixedly attached to the frame under tension.
  • this fixing method the welding method is most often used. In fixing, first, the center parts of the upper and lower frames of the frame are forcibly bent slightly inward, and the shadow mask is fixed in this state. Then, when the upper and lower frames that have been bent inward are returned (the compulsory force is released), the upper and lower tensions are applied to the shadow mask.
  • the shadow mask material is subjected to a test stress of 20 kgf / mm 2 on a test basis and the elongation after holding 450 x 60 minutes is 0.3% or less, the shadow mask may become loose during use of the picture tube. There is no problem such as the occurrence of a problem.
  • the chemical composition of a hot-rolled sheet of 5 mm is shown. These hot-rolled sheets were pickled with sulfuric acid or hydrochloric acid and then cold-rolled to obtain cold-rolled sheets having a thickness of 0.3 mm. Thereafter, the sheet thickness was reduced to 0.1 mm by cold rolling using a continuous annealing furnace.
  • test material (steel plate)
  • Table 2 summarizes the characteristic tests for the test materials obtained in this way.
  • the bow I tension test was performed by an Instron type tensile tester, and the cleave elongation was measured by a cleave tester.
  • the test conditions of the shadow mask material are such that the shadow mask can maintain the tension-loaded state without loosening.
  • the creep elongation was measured after applying a load stress of 20 kgf Zmm 2 to the shadow mask material and holding it at 450 ⁇ 60 minutes for this condition.
  • the material is compatible with the shadow mask of the flat mask even after the shadow mask is incorporated into the picture tube.
  • the shadow mask material 20 kg of load stress Placing by the f ZMM 2, room temperature ⁇ 450 X 60 minutes ⁇ room temperature ⁇ 4 5 0VX 20 minutes - unheated - 450 ⁇ X 20 minutes ⁇
  • the heating and cooling at room temperature is repeated three times so that the elongation is 0.6% or less. If the elongation is 0.6% or less, the shadow mask material can be used as a flat mask shadow mask even after the shadow mask is incorporated into the picture tube. This is shown in Table 2 under “Shadow Mask This is the reason why the standard value for creep elongation in “Characteristics” was set at 0.6%.
  • the shadow mask material of the present invention has excellent tensile strength and high-temperature creep strength, it is possible to provide a shadow mask that can support a completely flat surface CRT.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

La présente invention concerne un matériau pour masque perforé destiné à un tube de réception d'images couleurs, caractérisé en ce qu'il comprend une plaque d'acier calmé au carbone faiblement allié contenant entre 0, 0005 et 0, 03 % en poids de C, entre 0, 05 et 0, 5 % en poids de Mn et entre 0, 005 et 1, 0 % en poids de Al. En outre, cette invention concerne un masque perforé caractérisé en ce que lorsqu'il est monté dans un tube de réception d'images couleurs puis maintenu à 450 °C pendant 60 minutes sous une contrainte de charge de 20 kgf/mm2, celui-ci présente une élongation égale ou inférieure à 0, 6 %. De plus, l'invention concerne un tube de réception d'images couleurs comportant le masque perforé. En l'occurrence, le matériau utilisé pour fabriquer le masque perforé présente d'excellentes propriétés en terme de résistance à la traction et de résistance au fluage à haute température.
PCT/JP2000/003064 1999-05-14 2000-05-12 Materiau pour masque perfore destine a un tube de reception d'images couleurs, son precede de production, masque perfore et tube de reception d'images WO2000070109A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44325/00A AU4432500A (en) 1999-05-14 2000-05-12 Material for shadow mask for color image receiving tube, method for production thereof, shadow mask, and image receiving tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP13479299 1999-05-14
JP11/134792 1999-05-14

Publications (1)

Publication Number Publication Date
WO2000070109A1 true WO2000070109A1 (fr) 2000-11-23

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ID=15136659

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/003064 WO2000070109A1 (fr) 1999-05-14 2000-05-12 Materiau pour masque perfore destine a un tube de reception d'images couleurs, son precede de production, masque perfore et tube de reception d'images

Country Status (2)

Country Link
AU (1) AU4432500A (fr)
WO (1) WO2000070109A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425953A (en) * 1987-04-16 1989-01-27 Nippon Mining Co Shadow mask and its production
JPH09111423A (ja) * 1995-10-18 1997-04-28 Nippon Steel Corp Ｔｖブラウン管用磁気シールド材およびその製造方法
JPH09272922A (ja) * 1996-04-04 1997-10-21 Nkk Corp シャドウマスク用素材の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6425953A (en) * 1987-04-16 1989-01-27 Nippon Mining Co Shadow mask and its production
JPH09111423A (ja) * 1995-10-18 1997-04-28 Nippon Steel Corp Ｔｖブラウン管用磁気シールド材およびその製造方法
JPH09272922A (ja) * 1996-04-04 1997-10-21 Nkk Corp シャドウマスク用素材の製造方法

Also Published As

Publication number Publication date
AU4432500A (en) 2000-12-05

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