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WO2000070111A1 - Materiau destine a un masque perfore de tube recepteur d'images en couleurs, procede de production associe, masque perfore et tube recepteur d'images - Google Patents

Materiau destine a un masque perfore de tube recepteur d'images en couleurs, procede de production associe, masque perfore et tube recepteur d'images Download PDF

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Publication number
WO2000070111A1
WO2000070111A1 PCT/JP2000/003066 JP0003066W WO0070111A1 WO 2000070111 A1 WO2000070111 A1 WO 2000070111A1 JP 0003066 W JP0003066 W JP 0003066W WO 0070111 A1 WO0070111 A1 WO 0070111A1
Authority
WO
WIPO (PCT)
Prior art keywords
shadow mask
weight
picture tube
color picture
carbon steel
Prior art date
Application number
PCT/JP2000/003066
Other languages
English (en)
Japanese (ja)
Inventor
Tsuneyuki Ide
Takahiko Miyazaki
Susumu Shigemasa
Yasuo Tahara
Taizo Sato
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 AU44327/00A priority Critical patent/AU4432700A/en
Publication of WO2000070111A1 publication Critical patent/WO2000070111A1/fr

Links

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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/04—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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 shadow mask material 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.
  • a so-called curved (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 cathode ray tube has a problem that eyes are easily fatigued due to irregular reflection of external light rays such as lighting. Therefore, flattening of the cathode ray tube has been desired.
  • the flat surface may not be achieved on the slightly curved mask surface used in conventional CRTs.
  • An object of the present invention is to provide a color picture tube that can cope with the above-described flat flat-panel CRT, and furthermore, has excellent tensile strength and high-temperature creep strength. It is an object of the present invention to provide a color picture tube having a certain degree.
  • the present inventors have proposed a low-carbon steel to which P is added. P dissolves in the steel and has been found to have the effect of significantly improving the strength and high-temperature creep strength of low-carbon steel.
  • a tension-added shadow mask material for a color picture tube, a tension-added shadow mask for a color picture tube, and a color picture tube in which the excellent bow I tensile strength and high-temperature creep strength of the P-added steel are further improved (f) are proposed.
  • the material for a shadow mask for a color picture tube according to the present invention is made of a low-carbon steel containing 0.001 to 0.4% iO content of P and 0.1 to 2.0% by weight of Cr.
  • the material for a shadow mask for a color picture tube according to the present invention is characterized by being made of a low-carbon steel containing 0.001 to 0.4% by weight of P and 0.1 to 2.0% by weight of Mo.
  • the shadow mask material for a color picture tube of the present invention has a composition in which P is 0.001 to 0.4% by weight, Cr is 0.1 to 2.0% by weight, and Mo is 0.1 to 2.0% by weight. It is made of low carbon steel containing 0% by weight.
  • a shadow mask for a color picture tube according to the present invention uses the material for a shadow mask described in any of the above.
  • a color picture tube according to the present invention incorporates the above-mentioned 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 applied to a frame in a state where tension is applied vertically and horizontally.
  • the tension in the left-right direction is Desirably less than the tension.
  • the shadow mask material of the present invention is characterized in that the applied stress is 20 kgf Zmm 2 and the elongation when held for 45 OVX 60 minutes is 0.3% or less. I do.
  • the shadow mask of the present invention has an elongation of 0.6 when subjected to a load stress of 20 kgf / mm2 and held at 450 at x60 minutes after being incorporated into the empty picture tube. %. BEST MODE FOR CARRYING OUT THE INVENTION
  • the shadow mask of the present invention is fixed (for example, welded) to a frame in a state where a large tension is applied in a vertical direction after a steel plate in which the components to be contained in the shadow mask material are adjusted is formed by etching. Further, the shadow mask of the present invention is fixed to the frame in a state where a slight tension is applied to the frame in the horizontal direction as well as in the vertical direction.
  • the shadow mask of the present invention in the so-called blackening and baking, the shadow mask itself is relaxed even after the heat treatment is performed while tension is applied to the shadow mask. It has sufficient high-temperature creep strength to maintain a state without wrinkles.
  • the low-carbon steel used as the material of the shadow mask of the present invention a low-carbon steel that has been subjected to decarburization and denitrification using a vacuum degassing method O to reduce carbides and nitrides in the steel and hot-rolled is preferable.
  • the addition amount of ⁇ P is preferably at least 0.01 wt%, more preferably at least 0.01 wt%, even more preferably at least 0.3 wt%. Too much added In this case, mixed grains are generated due to segregation and cause embrittlement. Therefore, the content is preferably 0.4% by weight, more preferably 0.25% by weight or less, and further preferably 0.20% by weight or less. % By weight or less.
  • the amount of Cr added is desirably 0.1% by weight or more.
  • the content is preferably 2.0% by weight or less. More preferably, the content is 1.8% by weight or less. More preferably, the content is 1.6% by weight or less.
  • the content is preferably 2.0% by weight or less. More preferably, the content is 1.8% by weight or less. More preferably, the content is 1.6% by weight or less.
  • the amount of other elements is not particularly limited, but Si, S, Mn, Al, N and the like can be mentioned as trace elements or inevitable impurities.
  • the content of Si is preferably as small as possible because it inhibits the etching properties and deteriorates the denseness of the blackened film, and is preferably 0.3% by weight or less.
  • the content is small, and the content is 0.05% by weight or less. It is desirable to do.
  • 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 is an element that must be added to combine with S in steel to fix S contained in steel as Mn S and to prevent hot embrittlement. From this point, it is preferable that the content is 0.02% by weight or more. The content is more preferably 0.04% 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. More preferably, the content is 0.47% by weight or less.
  • the content is preferably 0.001% by weight or more. More preferably, the content is 0.002% by weight or more. More preferably, the content is 0.003% by weight or more.
  • the A1 content is preferably set to 0.1% by weight or less when
  • the content is not more than 08% by weight. More preferably, the content is 0.06% by weight or less.
  • N must be added because it forms a solid solution in steel and increases the hardness of the material and improves tensile strength and creep strength. For this reason, it is preferable to set the content to 0001% by weight or more.
  • the content is more preferably 0.0002% by weight or more, and even more preferably 0.0003% by weight or more.
  • the N content is large, nitrides increase and the material becomes brittle, so that the content is preferably 0.015% by weight or less.
  • the content is more preferably 0.013% by weight or less, and even more preferably 0.011% by weight or less.
  • the low-carbon alloy containing the above-mentioned chemical components melted by vacuum melting or vacuum degassing is hot-rolled, it is pickled to remove the oxide film formed in the hot-rolling process. Subsequently, cold rolling is performed to obtain a sheet thickness of 0.2 to 0.6 mm. Next, after softening by annealing, finishing is performed by cold rolling to a predetermined thickness of 0.1 to 0.15 mm.
  • annealing treatment any of a box-shaped annealing furnace and a continuous annealing furnace may be used. Next, the shadow mask of the present invention will be described.
  • the resist on both sides of the material was patterned using a glass dry plate in which a pair of front and back patterns were drawn. Next, exposure, hardening treatment and baking treatment are performed. Then, a ferric chloride solution having a liquid temperature of 60 T: and a specific gravity of 48 ° Be is used as an etching solution on both sides of the resist which has been patterned. Etching was performed by spraying from the play. After the etching, the resist was stripped off with an alkaline solution after washing with water, washed and dried to produce a shadow mask.
  • the shadow mask of the present invention is fixed to the frame under a 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 When the shadow mask is fixed to the frame, it is preferable to apply not only a vertical load but also a laterally smaller tension than a laterally applied tension. It is desirable that a strong tension is applied to the picture tube of the present invention in the vertical direction. When tension is applied not only in the vertical direction but also in the horizontal direction, wrinkles that occur in the shadow mask due to the vertical tension applied in the vertical direction can be prevented. However, it is not preferable to apply an excessively large tension to the left and right directions of the shadow mask y, since the slot holes formed in the shadow mask are deformed.
  • a shadow mask that has been subjected to slot hole processing and blackening processing by etching
  • the evaluation of the mechanical properties be strict in the state of the shadow mask material. Therefore, the shadow mask material, the applied stress over tentatively 20 kgf / mm 2, if 450 ⁇ X60 minutes Shin ir beauty is O. 3% or less when held in the picture tube used in a shadow mask Problems such as loosening do not occur.
  • Table 1 shows the chemical composition of hot rolled slabs, 0, which were obtained by vacuum degassing steels having different types of chemical compositions and hot-rolling them into 2.5 mm hot-rolled sheets. These hot-rolled sheets were pickled with sulfuric acid or hydrochloric acid, and then cold-rolled into 0.3 mm-thick cold-rolled sheets. After that, annealing was performed using a continuous annealing furnace, and the sheet thickness was reduced to 0.1 mm by cold rolling.
  • Table 2 summarizes the characteristic tests of the test materials obtained in this way.
  • Cleve elongation using cleaving tester manufactured by Tokai Seisakusho
  • load stress 20 kg f / mm 2 4 50 ° CX 60 minutes in the air
  • elongation at the time of holding (%) under load stress 20 kg f / mm 2 after addition to 45 OTX 60 minutes in the air, further 450t: a x 20 minutes twice, three times of heat treatment
  • the creep elongation (%) when the steel sheet was subjected to heat treatment This creep strength evaluation is determined based on the following criteria.
  • the reason why the creep elongation reference value in the column of ⁇ Characteristics of shadow mask material '' in Table 2 was set to ⁇ 0.3% or less '' is that the shadow mask was weld-welded to the frame after blackening.
  • the test conditions for the shadow mask material are defined so that the tension can be maintained without the shadow mask becoming loose even after the shadow mask is attached to the frame. It is.
  • As a condition by applying a load stress 20 kgf Zmm 2 in the shadow mask material, 450 The creep elongation after holding at 60 ° C for 60 minutes was measured. If the elongation is 0.3% 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.
  • 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
  • the shadow mask material of the present invention has excellent tensile strength and high-temperature cleaving strength of 9 °, 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

L'invention concerne un matériau destiné à un masque perforé d'un tube récepteur d'images en couleurs, comprenant un acier à faible teneur en carbone contenant 0,001 à 0,4 % en poids de P, et caractérisé en ce qu'il contient également 0,1 à 2,0 % en poids de Cr. L'invention concerne également un masque perforé, caractérisé en ce que, lors de son incorporation dans un tube récepteur d'images, et après maintien à 450 °C pendant 60 minutes sous une contrainte de charge de 20 kgf/mm2, il présente une élongation de l'ordre de 0,6 % ou moins. L'invention concerne encore un tube récepteur d'images dans lequel on a incorporé un tel masque perforé. Le matériau destiné à ce masque possède une excellente résistance à la traction et une résistance élevée au fluage.
PCT/JP2000/003066 1999-05-14 2000-05-12 Materiau destine a un masque perfore de tube recepteur d'images en couleurs, procede de production associe, masque perfore et tube recepteur d'images WO2000070111A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44327/00A AU4432700A (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
JP13498099 1999-05-14
JP11/134980 1999-05-14

Publications (1)

Publication Number Publication Date
WO2000070111A1 true WO2000070111A1 (fr) 2000-11-23

Family

ID=15141116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/003066 WO2000070111A1 (fr) 1999-05-14 2000-05-12 Materiau destine a un masque perfore de tube recepteur d'images en couleurs, procede de production associe, masque perfore et tube recepteur d'images

Country Status (2)

Country Link
AU (1) AU4432700A (fr)
WO (1) WO2000070111A1 (fr)

Citations (4)

* 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
JPH08127849A (ja) * 1994-10-31 1996-05-21 Sumitomo Metal Ind Ltd エッチング加工用ステンレス鋼
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 (4)

* 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
JPH08127849A (ja) * 1994-10-31 1996-05-21 Sumitomo Metal Ind Ltd エッチング加工用ステンレス鋼
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

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Publication number Publication date
AU4432700A (en) 2000-12-05

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