WO2000070108A1 - Materiau pour masque perfore, masque perfore et tube de reception d'images couleurs comportant ce masque perfore - Google Patents

Materiau pour masque perfore, masque perfore et tube de reception d'images couleurs comportant ce masque perfore Download PDF

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Publication number
WO2000070108A1
WO2000070108A1 PCT/JP2000/003063 JP0003063W WO0070108A1 WO 2000070108 A1 WO2000070108 A1 WO 2000070108A1 JP 0003063 W JP0003063 W JP 0003063W WO 0070108 A1 WO0070108 A1 WO 0070108A1
Authority
WO
WIPO (PCT)
Prior art keywords
shadow mask
hardness
weight
shadow
picture tube
Prior art date
Application number
PCT/JP2000/003063
Other languages
English (en)
Japanese (ja)
Inventor
Tsuneyuki Ide
Takahiko Miyazaki
Susumu Shigemasa
Yasuo Tahara
Hironao Okayama
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 AU44324/00A priority Critical patent/AU4432400A/en
Publication of WO2000070108A1 publication Critical patent/WO2000070108A1/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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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 shadow mask material, a shadow mask, and a color picture tube incorporating the same. More specifically, a shadow mask material for a color picture tube, which has excellent tensile strength and high temperature cleave strength, a shadow mask, and a shadow mask incorporating the same.
  • the shadow mask for a color picture tube is made of Fe-36% Ni alloy-based member material or aluminum-killed steel which is a kind of ultra-low carbon steel.
  • the shadow mask material used in such a conventional method has press moldability and shape freezing properties that maintain the shape at the time of pressing, so that it can be welded and attached to a frame with a slightly curved mask surface. It has been regarded as important.
  • An object of the present invention is to provide a shadow mask material for a color picture tube, a shadow mask and a picture tube incorporating the same, which are capable of coping with the above-mentioned complete flat surface cathode ray tube.
  • An object of the present invention is to provide a shadow mask material for a color picture tube having a high-temperature creep strength, a shadow mask, and a color picture tube incorporating the same.
  • heat treatment is performed to blacken the surface.However, in order to keep the tension-imparting shadow mask after the blackening without tension loosening, the heat treatment is performed. It has been carried out at a low temperature of about 60 minutes at a temperature lower than the recrystallization temperature of steel, for example, at 45 Ot :. However, under these blackening heat treatment conditions,
  • the creep strength has a correlation with the material hardness.However, in the case of the tension-imparting shadow mask for a color picture tube of the present invention, it cannot be said that the creep strength is determined solely by the hardness of the material. It has been found. This is due to the unique structure of the tensioning shadow mask for a color picture tube of the present invention. As described above, the tension mask for color picture tubes of the present invention has a structure in which the outer periphery is welded to the frame, and the elasticity of the frame allows the shadow mask to be moved in one direction from top and bottom or two directions from top and bottom and left and right. Under tension. A more detailed investigation revealed that various stresses other than tension were applied to the shadow mask. As a result, it was found that, in order to simulate the material strength required for the tension-imparting shadow mask of the present invention, in addition to the hardness test, evaluation by a creep test was appropriate.
  • Fe-36% Ni alloy metal or aluminum-killed steel used for conventional dome-type shadow masks is hardened when shipped from a material supplier.
  • the hardness is in the range of Weitzkers hardness (Hv) of 140 to 200 for Invar, and 160 to 240 for aluminum killed steel.
  • Hv Weitzkers hardness
  • These material steel sheets are first subjected to etching processing, but after a predetermined dot hole processing, the temperature is higher than the recovery or recrystallization temperature of invar material and aluminum killed steel. In this case, it is necessary to soften the material by performing annealing heat treatment. In this annealing heat treatment, when the shadow mask is press-formed into a dome shape in a subsequent press process, the shadow mask material is required to have good press formability.
  • the hardness of Fe-36% Ni alloy-based members or aluminum-killed steel used for conventional dome-type shadow masks is limited, and when it is incorporated in a cathode ray tube, the Weitzkers hardness ( H v) is approximately 150 or less. In other words, the characteristics required for the shadow mask material are the same as those of the conventional dome-type color CRT and flat surface CRT.
  • An object of the present invention is to solve the above problems, and an object of the present invention is to provide a tension-imparting shadow mask for a color picture tube having excellent tensile strength and high-temperature cleave strength, and a color picture tube incorporating the same. ? Disclosure of the invention
  • the shadow mask material according to the first embodiment of the present invention is an invar alloy containing 34 to 37% by weight of Ni and an unavoidable trace element, with the balance being Fe. It is characterized in that the hardness when incorporated into a pipe is 160 to 250 in Weitzkers hardness (Hv).
  • the shadow mask material according to the second aspect of the present invention is an invar alloy containing 34 to 37% by weight of Ni and an unavoidable trace element, with the balance being Fe. Big In a creep test in which a tensile stress of 20 kgf / mm 2 is applied in a humid atmosphere, the creep test is performed at a temperature of 450 so that the creep strain after a holding time of 60 minutes is 0.1% or less. It is characterized by having done.
  • the shadow mask material according to the third embodiment of the present invention is an invar alloy containing 34 to 37% by weight of Ni and an unavoidable trace element, with the balance being Fe.
  • a tensile stress of 20 kgf Zmm 2 was applied in an atmosphere, the creep strain after a holding time of 60 minutes at a temperature of 450 was 0.1% or less, and an image was received. It is characterized in that the hardness when incorporated into a pipe is 160-250 in Weitzkaers hardness (HV).
  • a shadow mask according to the present invention uses the shadow mask material according to any one of claims 1 to 3.
  • a color picture tube according to the present invention is characterized by incorporating the shadow mask of claim 4.
  • the material used in the present invention contains 34 to 37% by weight of Ni and 0.05 to 0.40% by weight of Mn as alloying elements, and the balance consists of Fe and unavoidable impurity elements.
  • Fe-Ni Invar alloy This material, by managing the processing rate range of temper rolling the final step, high hardness Invar can be obtained, and even after having been subjected to blackening heat treatment after working the shadow £) mask, Vuitsukasu hard (Hv) was found to be maintained in the range of 160 to 250.
  • the alloy used as a material of the shadow mask for a color picture tube according to the present invention contains 34 to 37% by weight of Ni and 0.05 to 0.40% by weight of Mn as alloying elements, and the remainder is Fe and inevitable. Consisting of impurity elements.
  • the content of ⁇ ⁇ i is in the range of the Ni content having the so-called Invar effect in the Fe—Ni binary alloy, and specifically, is preferably 34% by weight or more and 37% by weight or less.
  • Ni content is less than 34% by weight or exceeds 37% by weight, the inherent invar effect cannot be obtained, and the low thermal expansion coefficient peculiar to the invar material cannot be obtained.
  • ⁇ must be combined with S in steel and fixed as Mn S, and must be added to prevent hot brittleness and D.
  • Mn S the effect of adding Mn over 0.4 wt. Since no improvement is observed, it is limited to 0.4% by weight or less.
  • unavoidable trace elements include, for example, C, S, Si and P. Each of these elements impairs the etching characteristics, and in particular, S and P embrittle the material, so it is preferable to minimize the content.
  • each of C, S and P is preferably set to 0.01% by weight or less, and Si is preferably reduced to 0.1% by weight or less.
  • Ni-Mn-based member material The invar material containing Ni and Mn used in the present invention (hereinafter referred to as Ni-Mn-based member material) is usually obtained after reducing impurity elements such as C, Si, S, and P in the melting step. Then, it is inserted into an ingot case to produce a lump, and is hot-rolled into a hot-rolled steel strip (hot coil). Next, after removing the oxide film on the surface and passing through a process in which cold rolling and subsequent annealing are combined at least once each, the hardness of the material is adjusted by surface pass rolling, and the surface roughness is imparted. Provide for etching as a material for masks.
  • the hardness does not limit the hardness of the shadow mask material, but specifies the hardness of the shadow mask when incorporated as a shadow mask into a CRT for a color picture tube under tension. It is.
  • the hardness of chamber material which is a shadow mask material that imparts tension, is affected by the type and content of impurities, the working ratio during cold rolling, the heating conditions during annealing, and the working ratio during temper rolling. Receive strongly.
  • the working rate during cold rolling is generally in the range of 20 to 95% i
  • annealing is performed in the range of 700 to 100% when using a continuous furnace, and temper rolling. Is preferably performed at a processing rate of 1 to 50%.
  • the material hardness of the tension-imparting shadow mask material is affected by the type and content of impurities, the working ratio during cold rolling, the temperature conditions during annealing, and the working ratio during temper rolling. Therefore, it is important to control the manufacturing conditions of the invar material for the tension imparting shadow mask in accordance with these influential factors.
  • the tension-imparting shadow mask for a picture tube of the present invention requires that the material hardness at the time of incorporation into a cathode ray tube be in the range of 160 to 230 in Weitzkaers hardness (Hv).
  • Hv Weitzkaers hardness
  • the hardness of the material to be etched must be approximately in the range of Weitzkers hardness (Hv) 180 to 280.
  • the working ratio during cold rolling is set in the range of 20 to 40%
  • the annealing temperature is set to 700 to 800
  • the working ratio during temper rolling is 3
  • the tension-imparting shadow mask for a color picture tube according to the present invention further has an excellent cleave strength as a mechanical property.
  • the cleave strength is the same as the hardness, the type and content of impurities, the working ratio during cold rolling, the heating conditions during annealing, and the working ratio during temper rolling.
  • the tension-imparting shadow mask for a color picture tube of the present invention has a creep strength at the time of assembling into a cathode ray tube of 20 kgf / mm in an air atmosphere at a temperature of 450 and a creep strain of 60 minutes after a holding time of 60 minutes. Less than 1%
  • the working ratio during cold rolling is set to 30 to 95%
  • the annealing temperature is set to 700 to 800
  • the working ratio during temper rolling is set to 30 to 50%. It is desirable to set appropriate manufacturing conditions. Needless to say, it is necessary to manufacture a material in which the type and content of impurities in the invar material for a tension mask for a color picture tube are within a predetermined range.
  • the tension-imparting shadow mask for a color picture tube of the present invention may include an alloy element other than ⁇ i and ⁇ .
  • the alloy element is C o. Mo, Cr, T i, Nb, V, W, A1, and Cu, and at least one of them is contained, and the content is limited to the range of 0.01 to 2.0% by weight for each element.
  • Co has the effect of further reducing the coefficient of thermal expansion of the tension imparting shadow mask of the present invention and reducing color unevenness due to the thermal expansion of the shadow mask.
  • Co is an expensive element, and the upper limit is 2.0% by weight. If the content is less than 0.01% by weight, the effect is not remarkable.
  • a 1 has a remarkable deoxidizing effect on the molten metal in the melting step, so that a clean molten metal can be obtained and, consequently, a steel sheet with few material defects can be obtained. Further, since solid solution hardening is obtained, the material can be strengthened. However, if the content exceeds 2.0% by weight, solid solution hardening becomes excessive and the etching characteristics are adversely affected. Therefore, the upper limit is set to 2.0% by weight. On the other hand, if the content is less than 0.01% by weight, the effect is not clear.
  • a slab obtained by vacuum degassing and melting six types of invar materials (A to F) having the chemical compositions shown in Table 1 was hot-rolled to obtain a hot-rolled steel sheet having a thickness of 2.5 mm.
  • Table 2 shows that the hot rolled steel sheet in Table 1 was washed with nitric acid and then cold rolled to reduce the working rate from 20 to 85.
  • the tension mask for a color picture tube comprising an Invar alloy containing 34 to 37% by weight of Ni and an unavoidable trace element and the balance being Fe of the present invention has high hardness and is excellent. It has high creep strength.
  • the shadow mask has a small deformation amount.
  • the shadow mask material of the present invention is welded to a frame while applying a large tension in the vertical direction, and in a subsequent heat treatment step, the tension is applied to the shadow mask in a state where the tension is applied without loosening. It has sufficient cleave strength even at high temperatures to maintain it.
  • the shadow mask material of the present invention is similarly sufficiently applied to a shadow mask that applies a constant tension from up, down, left, and right. It can demonstrate its function.
  • the shadow mask material of the present invention has excellent tensile strength and creep strength, the shadow mask does not deform even if it is subjected to a heat treatment for blackening after being welded to the frame. It has the effect of.

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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)
  • Heat Treatment Of Sheet Steel (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 un alliage d'invar contenant Ni dans des proportions comprises entre 34 et 37 % en poids et des éléments à l'état de traces inévitables, l'équilibre étant Fe, et présente par ailleurs une dureté Vickers (Hv) comprise entre 160 et 250 lorsqu'il est monté dans un tube de réception d'images. En outre, cette invention concerne un masque perforé composé de ce matériau; et un tube de réception d'images comportant le masque perforé. En l'occurrence, le matériau utilisé dans la fabrication du masque perforé présente d'excellentes propriétés en terme de résistance à la traction et de résistance au fluage à haute température.
PCT/JP2000/003063 1999-05-12 2000-05-12 Materiau pour masque perfore, masque perfore et tube de reception d'images couleurs comportant ce masque perfore WO2000070108A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44324/00A AU4432400A (en) 1999-05-12 2000-05-12 Material for shadow mask, shadow mask and color image receiving tube having the shadow mask incorporated therein

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/132017 1999-05-12
JP13201799 1999-05-12

Publications (1)

Publication Number Publication Date
WO2000070108A1 true WO2000070108A1 (fr) 2000-11-23

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PCT/JP2000/003063 WO2000070108A1 (fr) 1999-05-12 2000-05-12 Materiau pour masque perfore, masque perfore et tube de reception d'images couleurs comportant ce masque perfore

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AU (1) AU4432400A (fr)
WO (1) WO2000070108A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100910332B1 (ko) 2001-09-13 2009-07-31 스미토모 덴키 고교 가부시키가이샤 강도, 비틀림 특성이 우수한 인바 합금선 및 그 제조방법
WO2020067537A1 (fr) 2018-09-27 2020-04-02 日鉄ケミカル＆マテリアル株式会社 Matériau de masque métallique, son procédé de production et masque métallique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5396146A (en) * 1992-04-27 1995-03-07 Hitachi Metals, Ltd. Shadow mask sheet, method of producing same and cathode ray tube provided therewith
JPH0813096A (ja) * 1994-06-28 1996-01-16 Nkk Corp エッチング性と表面処理性に優れた電子用高強度 低熱膨張合金薄板とその製造法
US5501749A (en) * 1992-01-24 1996-03-26 Nkk Corporation Method for producing a thin Fe-Ni alloy for shadow mask thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501749A (en) * 1992-01-24 1996-03-26 Nkk Corporation Method for producing a thin Fe-Ni alloy for shadow mask thereof
US5396146A (en) * 1992-04-27 1995-03-07 Hitachi Metals, Ltd. Shadow mask sheet, method of producing same and cathode ray tube provided therewith
JPH0813096A (ja) * 1994-06-28 1996-01-16 Nkk Corp エッチング性と表面処理性に優れた電子用高強度 低熱膨張合金薄板とその製造法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100910332B1 (ko) 2001-09-13 2009-07-31 스미토모 덴키 고교 가부시키가이샤 강도, 비틀림 특성이 우수한 인바 합금선 및 그 제조방법
WO2020067537A1 (fr) 2018-09-27 2020-04-02 日鉄ケミカル＆マテリアル株式会社 Matériau de masque métallique, son procédé de production et masque métallique
KR20210049888A (ko) 2018-09-27 2021-05-06 닛테츠 케미컬 앤드 머티리얼 가부시키가이샤 메탈 마스크 재료 및 그의 제조 방법과 메탈 마스크

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Publication number Publication date
AU4432400A (en) 2000-12-05

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