EP0745697B1 - Eisen-Kobalt-Nickellegierung und Verwendung für die Herstellung von Lochmasken - Google Patents

Eisen-Kobalt-Nickellegierung und Verwendung für die Herstellung von Lochmasken Download PDF

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Publication number
EP0745697B1
EP0745697B1 EP96400734A EP96400734A EP0745697B1 EP 0745697 B1 EP0745697 B1 EP 0745697B1 EP 96400734 A EP96400734 A EP 96400734A EP 96400734 A EP96400734 A EP 96400734A EP 0745697 B1 EP0745697 B1 EP 0745697B1
Authority
EP
European Patent Office
Prior art keywords
less
alloy
shadow mask
equal
manufacture
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP96400734A
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English (en)
French (fr)
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EP0745697A1 (de
Inventor
Ricardo Cozar
Marie-Paul Solignac
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aperam Stainless Precision SAS
Original Assignee
Imphy Ugine Precision SA
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Publication date
Application filed by Imphy Ugine Precision SA filed Critical Imphy Ugine Precision SA
Publication of EP0745697A1 publication Critical patent/EP0745697A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt

Definitions

  • the present invention relates to a low Fe-Ni-Co alloy coefficient of expansion as well as its use for the manufacture of a shadow mask for cathode ray display tube.
  • Low-expansion Fe-Ni-Co alloys commonly known as SUPERINVAR
  • SUPERINVAR Low-expansion Fe-Ni-Co alloys
  • These alloys are used in particular for the manufacture of shadow masks as indicated, for example, in European patent application EP 05340460 which proposes to use for the manufacture of shadow masks an Fe-Ni-Co alloy containing, by weight, in addition to iron, from 28% to 34% of nickel, from 2% to 7% of cobalt, from 0.1% to 1% of manganese, less than 0.1% of silicon and less than 0.01 % of carbon; the remainder being impurities resulting from the processing.
  • this alloy sometimes has the drawback of having a point M s at the start of martensitic transformation close to ambient temperature so that, either during the formation of the shadow mask, or during its storage at low temperature, the transformation martensitic begins, which causes permanent deformation of the shadow mask.
  • the alloy due in particular to the manganese content, considered necessary for the alloy to have good hot rolling ability, the alloy has a coefficient of expansion which is a little too high to sufficiently reduce the blistering defect. of the shadow mask.
  • the aim of the present invention is to provide an Fe-Ni-Co alloy which has a martensitic transformation start point of less than -50 ° C, an average coefficient of thermal expansion between 20 ° C and 100 ° C of less than 0, 7x10 -6 / ° K and an average coefficient of thermal expansion between 80 ° C and 130 ° C less than 1x10 -6 / ° K.
  • the subject of the invention is an Fe-Ni-Co alloy, the chemical composition of which comprises, by weight: 32% ⁇ Ni ⁇ 34% 3.5% ⁇ Co ⁇ 6.5% 0% ⁇ Mn ⁇ 0.1% 0% ⁇ If ⁇ 0.1% 0% ⁇ Cr ⁇ 0.1% 0.005% ⁇ C ⁇ 0.02% S ⁇ 0.001% 0.0001% ⁇ Ca ⁇ 0.002% 0.0001% ⁇ Mg ⁇ 0.002% the remainder being iron and impurities resulting from the production, including copper, molybdenum, vanadium, nobium; the chemical composition of the alloy further satisfying the relationships: Co + Ni ⁇ 38.5% Co + 0.5 x Ni ⁇ 20% Co + 5 x Ni ⁇ 165.5% and S ⁇ 0.02 x Mn + 0.8 x Ca + 0.6 x Mg
  • the contents of copper, molybdenum, vanadium and niobium must each be less than 0.1%. And better yet, the sum of the contents of manganese, silicon, chromium, copper, molybdenum, vanadium and niobium must be less than 0.30%.
  • the oxygen content is lower or equal to 0.01%, whether the nitrogen content is less than or equal to 0.005% and the phosphorus content is less than or equal to 0.005%.
  • the invention also relates to the use of the alloy according to the invention for the manufacture of a shadow mask as well as the mask shade thus obtained.
  • the alloy according to the invention is a Fe-Ni-Co alloy whose chemical composition is adjusted so that, at the same time, its average coefficient of expansion between 20 ° C and 100 ° C is less than or equal to 0.7x10 - 6 / ° K, its average expansion coefficient between 80 ° C and 130 ° C is less than or equal to 1x10 -6 / ° K and are point M s is less than -50 ° C.
  • the chemical composition of the alloy comprises, by weight, at least 32% and at most 34% of nickel as well as at least 3.5% and at most 6.5% of cobalt, the nickel and cobalt contents being such that : Co + Ni ⁇ 38.5% so that the average coefficient of expansion between 20 ° C and 100 ° C is less than 0.7x10 -6 / ° K; Co + 0.5 x Ni ⁇ 20% so that the average coefficient of expansion between 80 ° C and 130 ° C is less than 1x10 -6 / ° K; Co + 5 x Ni ⁇ 165.5% so that the point M s is less than -50 ° C.
  • the manganese, silicon and chromium contents must be less than or equal to 0.1 %.
  • the alloy In order for the point M s to remain below -50 ° C., the alloy must contain at least 0.005% carbon, however, in order not to deteriorate the formability by drawing, the carbon content does not must not exceed 0.02%.
  • the oxygen content remains less than or equal to 0.01%, than the nitrogen content remains less than or equal to 0.005% and that the content of phosphorus remains less than or equal to 0.005%.
  • the alloy is produced, it is poured into an ingot or a slab, it is hot rolled to form a strip of thickness of approximately 4mm; the strip is then cold rolled to obtain a cold strip with a thickness of about 0.15 mm.
  • This cold strip has a plastic flow limit R p0.2 at 20 ° C of the order of 600Mpa which is much too large to allow easy shaping, also, after machining the mask blanks by chemical cutting, these blanks are subjected to an annealing between 700 ° C and 850 ° C which brings the plastic flow limit R p0.2 at 20 ° C to about 320Mpa. Then each blank is shaped, for example by stamping, to obtain a shadow mask.
  • the alloys A to D according to the invention were manufactured, the chemical compositions of which were, in% by weight: rep Or Co Mn Yes Cr VS S It Mg Fe AT 32.7 4.5 0.06 0.08 0.04 0.014 0.0006 0.0005 0.0015 comp. B 33.5 4.5 0.05 0.08 0.07 0.014 0.0009 0.0012 0.0009 comp. VS 33.5 3.5 0.05 0.08 0.05 0.011 0.0007 0.0008 0.0007 comp. D 33.3 4.2 0.05 0.09 0.06 0.018 0.0008 0.0011 0.0011 comp.
  • shadow masks can be made in particular a sheet pierced with holes and shaped by stamping.
  • These shadow masks have a fully structured austenitic even after shaping or after storage in a cold atmosphere, and they have a local blistering defect of at least minus 40% if there is no local blistering of alloy shadow masks Iron-Nickel according to the prior art.

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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 Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (6)

  1. Fe-Ni-Co-Legierung mit der folgenden chemischen Zusammensetzung, in Gewichtsprozent: 32 % ≤ Ni ≤ 34 % 3,5 % ≤ Co ≤ 6,5 % 0 % ≤ Mn ≤ 0,1 % 0 % ≤ Si ≤ 0,1 % 0 % ≤ Cr ≤ 0,1 % 0,005 % ≤ C ≤ 0,02 % S ≤ 0,001 % 0,0001 % ≤ Ca ≤ 0,002 % 0,0001 % ≤ Mg ≤ 0,002 % Rest Eisen und aus der Verarbeitung stammende Verunreinigungen, darunter Kupfer, Molybdän, Vanadium, Niob, wobei die chemische Zusammensetzung der Legierung außerdem die folgenden Bedingungen erfüllt, Co + Ni ≤ 38,5 % Co + 0,5 x Ni ≥ 20 % Co + 5 x Ni ≥ 165,5 % und S ≤ 0,02 x Mn + 0,8 x Ca + 0,6 x Mg
  2. Legierung nach Anspruch 1, dadurch gekennzeichnet, dass die Gehalte an Kupfer, Molybdän, Vanadium und Niob jeweils kleiner als 0,1 % sind.
  3. Legierung nach Anspruch 2, dadurch gekennzeichnet, dass die Summe der Gehalte an Mangan, Silizium, Chrom, Kupfer, Molybdän, Vanadium und Niob kleiner als 0,3 % ist.
  4. Legierung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Gehalt an Sauerstoff kleiner oder gleich 0,01 % ist, der Gehalt an Stickstoff kleiner oder gleich 0,005 % ist und der Gehalt an Phosphor kleiner oder gleich 0,005 % ist.
  5. Verwendung einer Legierung nach einem der Ansprüche 1 bis 4 zur Herstellung einer Lochmaske.
  6. Lochmaske, dadurch gekennzeichnet, dass sie wenigstens eine von Löchern durchsetzte Platte aufweist, die aus einer Legierung nach einem der Ansprüche 1 bis 4 besteht.
EP96400734A 1995-05-05 1996-04-05 Eisen-Kobalt-Nickellegierung und Verwendung für die Herstellung von Lochmasken Expired - Lifetime EP0745697B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505362 1995-05-05
FR9505362A FR2733767B1 (fr) 1995-05-05 1995-05-05 Alliage fe-co-ni et utilisation pour la fabrication d'un masque d'ombre

Publications (2)

Publication Number Publication Date
EP0745697A1 EP0745697A1 (de) 1996-12-04
EP0745697B1 true EP0745697B1 (de) 2000-02-23

Family

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Family Applications (1)

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EP96400734A Expired - Lifetime EP0745697B1 (de) 1995-05-05 1996-04-05 Eisen-Kobalt-Nickellegierung und Verwendung für die Herstellung von Lochmasken

Country Status (8)

Country Link
EP (1) EP0745697B1 (de)
JP (1) JP3756984B2 (de)
KR (1) KR100416116B1 (de)
CN (1) CN1059933C (de)
DE (1) DE69606737T2 (de)
DK (1) DK0745697T3 (de)
FR (1) FR2733767B1 (de)
PL (1) PL314075A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW442575B (en) * 1998-12-15 2001-06-23 Nippon Mining & Amp Metals Co Fe-Ni based alloy for tension mask, as well as tension mask, for which the same is used, and color brauon-tube
EP1352981B1 (de) * 2000-11-21 2011-01-19 Nippon Yakin Kogyo Co., Ltd. Eisen-nickel-legierung für schattenmasken mit hervorragender eignung für das ätzen
DE10258356B3 (de) * 2002-12-12 2004-05-27 Thyssenkrupp Vdm Gmbh Verwendung einer Eisen-Nickel-Cobalt-Legierung
CN103924153B (zh) * 2014-04-22 2016-04-27 钢铁研究总院 一种低膨胀磁屏蔽合金及其制备方法
CN105316576A (zh) * 2014-07-31 2016-02-10 宝钢特钢有限公司 一种具有优良焊接性能的FeNi殷瓦合金
CN108165889B (zh) * 2017-12-27 2019-12-20 北京北冶功能材料有限公司 一种具有高的最大磁导率的低膨胀合金及制备方法
CN108359915B (zh) * 2018-02-13 2020-02-18 鞍钢股份有限公司 一种Fe-Ni低膨胀合金的冶炼方法
CN109023348A (zh) * 2018-08-22 2018-12-18 哈尔滨工程大学 一种基于因瓦效应的FeNiCo系合金熔覆涂层材料

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0174196B1 (de) * 1984-09-06 1989-03-22 Kabushiki Kaisha Toshiba Material für in Kathodenstrahlröhren eingebaute Komponenten und sein Herstellungsverfahren
US4853298A (en) * 1986-04-08 1989-08-01 Carpenter Technology Corporation Thermally stable super invar and its named article
JP2723718B2 (ja) * 1991-09-27 1998-03-09 ヤマハ株式会社 シャドウマスク用Ｆｅ−Ｎｉ−Ｃｏ系合金

Also Published As

Publication number Publication date
JPH08311622A (ja) 1996-11-26
JP3756984B2 (ja) 2006-03-22
FR2733767B1 (fr) 1997-06-06
DE69606737T2 (de) 2000-08-17
KR960041391A (ko) 1996-12-19
EP0745697A1 (de) 1996-12-04
PL314075A1 (en) 1996-11-12
CN1059933C (zh) 2000-12-27
KR100416116B1 (ko) 2004-03-30
CN1138634A (zh) 1996-12-25
DK0745697T3 (da) 2000-06-19
FR2733767A1 (fr) 1996-11-08
DE69606737D1 (de) 2000-03-30

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