JPH03191024A - Manufacture of iron-nickel base alloy stock for shadow mask - Google Patents
Manufacture of iron-nickel base alloy stock for shadow maskInfo
- Publication number
- JPH03191024A JPH03191024A JP32834089A JP32834089A JPH03191024A JP H03191024 A JPH03191024 A JP H03191024A JP 32834089 A JP32834089 A JP 32834089A JP 32834089 A JP32834089 A JP 32834089A JP H03191024 A JPH03191024 A JP H03191024A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- shadow mask
- nickel
- base alloy
- nickel base
- 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.)
- Pending
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 28
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 230000001590 oxidative effect Effects 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 238000009749 continuous casting Methods 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 238000005204 segregation Methods 0.000 abstract description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 description 8
- 238000005097 cold rolling Methods 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 5
- 238000005242 forging Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910001327 Rimmed steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、カラーテレビブラウン管のシャドウマスク用
鉄−ニッケル基合金素材の製造方法に関するものであり
、特には電子ビーム通過用の孔を穿孔するための、爾後
のエツチング時のスジむらの発生を抑制しうるシャドウ
マスク用鉄−ニッケル基合金素材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an iron-nickel based alloy material for a shadow mask of a color television cathode ray tube. The present invention relates to a method for producing an iron-nickel based alloy material for a shadow mask that can suppress the occurrence of uneven streaks.
本発明に従い製造されたシャドウマスク素材は、高精細
マスクの作製を可能とし、高品位カラーテレビやコンピ
ューターのデイスプレィ用シャドウマスク分野で有益に
利用される。The shadow mask material produced according to the present invention enables the production of high-definition masks and is usefully utilized in the field of shadow masks for high-definition color television and computer displays.
免亙立ＩＩ
カラーテレビブラウン管のシャドウマスク素材としては
一般に軟鋼（リムド鋼あるいはアルミキルド鋼）が知ら
れている。カラーテレビブラウン管内では、電子銃から
出る電子ビームがシャドウマスクの微小孔を通過して蛍
光スクリーン上の所定の点に精密に照射されて、特定の
色調が与えられる。Mild steel (rimmed steel or aluminum killed steel) is generally known as a shadow mask material for color television cathode ray tubes. In a color television cathode ray tube, an electron beam from an electron gun passes through a small hole in a shadow mask and is precisely irradiated onto a predetermined point on a fluorescent screen, giving it a specific color tone.
ところが、電子ビームは全部シャドウマスクの微小孔を
通過するわけではなく、シャドマスクの微小孔を通過せ
ずにシャドウマスクに射突する電子ビームによってシャ
ドウマスクは加熱される。However, not all of the electron beams pass through the small holes in the shadow mask, and the shadow mask is heated by the electron beams that impinge on the shadow mask without passing through the small holes in the shadow mask.
そのため、シャドウマスクは、熱膨張により、いわゆる
ドーミングと呼ばれる変形を起こす。その結果、シャド
ウマスクと蛍光スクリーンとの位置関係にずれが起こり
、電子ビームが正確に蛍光スクリーンに照射されなくな
り、色純度が低下するという問題がある。Therefore, the shadow mask undergoes deformation called doming due to thermal expansion. As a result, a shift occurs in the positional relationship between the shadow mask and the fluorescent screen, causing the problem that the electron beam is not accurately irradiated onto the fluorescent screen, resulting in a decrease in color purity.
この問題を解決するために、熱膨張係数の小さいアンバ
ーのような鉄−ニッケル基合金をシャドウマスク素材と
して使用することが提案された。To solve this problem, it has been proposed to use an iron-nickel based alloy such as amber, which has a small coefficient of thermal expansion, as a shadow mask material.
ｌ上弦Ｉ
しかし、このような鉄−ニッケル基合金シャドウマスク
素材を、通常の製造工程、例えばリードフレーム用４２
合金材と同様の製造工程（連続鋳造−熱間圧延−酸洗、
研摩−冷間圧延一焼鈍一冷間圧延、以降所定板厚まで焼
鈍、冷間圧延を適宜繰り返す）により製造すると、シャ
ドウマスク素材に電子ビーム通過用の孔を穿孔するため
のエツチングをした際スジむらが発生した。However, such an iron-nickel based alloy shadow mask material cannot be used in a normal manufacturing process, for example, for lead frames.
Manufacturing process similar to alloy materials (continuous casting - hot rolling - pickling,
When manufactured by polishing - cold rolling, annealing, cold rolling, and then repeating annealing and cold rolling as appropriate to a predetermined thickness, there will be no streaks when the shadow mask material is etched to make holes for the electron beam to pass through. Unevenness occurred.
このスジむらは、エツチングしたシャドウマスクを透過
光（斜光）で観察すると、圧延方向と平行に多数のスジ
が見える現象である。軟鋼でも圧延方向と平行にスジが
発生することがあるが、これは軟鋼中の非金属介在物が
原因であることがわかっている。しかし、アンバーのよ
うな鉄−ニッケル基合金の場合には、合金中の非金属介
在物を減少させてもスジむらは消失せず、鉄−ニッケル
基合金固有の原因があると考えられ、改善が望まれてい
た。This streak unevenness is a phenomenon in which a large number of streaks appear parallel to the rolling direction when an etched shadow mask is observed under transmitted light (oblique light). Even in mild steel, streaks may occur parallel to the rolling direction, but it is known that this is caused by nonmetallic inclusions in the mild steel. However, in the case of iron-nickel-based alloys such as Amber, the streaks do not disappear even if the non-metallic inclusions in the alloy are reduced, and it is thought that the cause is unique to the iron-nickel-based alloy, and improvements can be made. was desired.
そこで、本件出願人は先に、鉄−ニッケル基合金材のス
ジむらについて種々の研究を行ない、その結果、スジむ
らの原因はニッケル、マンガン等の成分偏析であり、偏
析部は母材部とエツチング性に差があるため、エツチン
グ孔壁面に凹凸ができ、これらがスジ状に見えることを
解明した。Therefore, the applicant first conducted various studies on streak unevenness in iron-nickel base alloy materials, and found that the cause of streak unevenness is segregation of components such as nickel and manganese, and that the segregated area is different from the base material. It was discovered that due to the difference in etching properties, unevenness occurs on the etching hole wall surface, and these appear as stripes.
そこで、本件出願人は、この偏析によるスジむらを解消
するために、鉄−ニッケル基合金インゴットを８５０℃
以上で且つ融点以下の温度で加熱し、ｌヒート又は２ヒ
一ト以上で、断面減少率４０％以上の条件で鍛造する製
造方法を提案した（特開昭６０−１２８２５３号）。Therefore, in order to eliminate the uneven streaks caused by this segregation, the applicant of the present application has developed an iron-nickel based alloy ingot heated to 850°C.
We have proposed a manufacturing method in which the material is heated at a temperature above and below the melting point, and forged under the conditions of 1 heat or 2 heats and a reduction in area of 40% or more (Japanese Patent Application Laid-open No. 128253/1983).
が しよ とする
上記鍛造方法により確かにスジむら解消の効果は得られ
た。しかし、特にドーミングによる色純度の低下が問題
になる高精細のコンピューターのデイスプレー用シャド
ウマスクでは、まだ、十分スジむらが解消できない問題
があった。また、前記鍛造を行なう方法であると、作業
性が悪く、インゴットを連続鋳造で製造するわけにはい
かなくなり、コスト的にも不利であった。The forging method described above was certainly effective in eliminating streaks. However, shadow masks for high-definition computer displays, in particular where a decline in color purity due to doming is a problem, still have the problem of not being able to sufficiently eliminate streaks. Furthermore, the forging method has poor workability, making it impossible to manufacture ingots by continuous casting, and is disadvantageous in terms of cost.
従って、本発明の課題は、作業性が良く、特に連続鋳造
の採用を可能ならしめる、コスト的に有利な方法でエツ
チング時のスジむら発生を完全に解消する方法を新たに
開発することである。Therefore, an object of the present invention is to develop a new method that completely eliminates the occurrence of streaks during etching using a cost-effective method that has good workability and in particular enables the adoption of continuous casting. .
を ゛するための
本発明者らは、これらの問題について種々の検討をおこ
なった結果、偏析は主に中心部で起こることが判明し、
そのため、加熱法が基本的には最も効果的との結論に達
したが、加熱を行なう場合には酸化が重大な問題となる
。そこで、非酸化性雰囲気もしくは還元性雰囲気中で１
０００℃以上融点以下の温度で熱処理することで酸化問
題を伴わず、成分偏析によるスジむらを完全に解消する
ことに成功した。The inventors conducted various studies on these issues and found that segregation mainly occurs in the central area.
Therefore, it was concluded that the heating method is basically the most effective, but oxidation becomes a serious problem when heating is used. Therefore, in a non-oxidizing atmosphere or a reducing atmosphere,
By heat-treating at a temperature of 000°C or higher and lower than the melting point, we succeeded in completely eliminating streaks caused by component segregation without any oxidation problems.
すなわち、本発明は、シャドウマスク用鉄−ニッケル基
合金を鋳造後、非酸化性雰囲気もしくは還元性雰囲気中
で１０００℃以上且つ融点以下の温度で熱処理し、その
後シート素材とすることを熱処理する、エツチング時の
スジむらの発生を抑制しうるシャドウマスク用鉄−ニッ
ケル基合金素材の製造方法を提供するものである。That is, in the present invention, after casting an iron-nickel based alloy for a shadow mask, it is heat-treated at a temperature of 1000° C. or higher and lower than the melting point in a non-oxidizing atmosphere or a reducing atmosphere, and then heat-treated to form a sheet material. The present invention provides a method for manufacturing an iron-nickel based alloy material for a shadow mask, which can suppress the occurrence of uneven streaks during etching.
連続鋳造により製造した鉄−ニッケル基合金を熱処理す
るのが非常に有利である。It is very advantageous to heat treat iron-nickel based alloys produced by continuous casting.
ｌ胛夙且盗■１１
本発明において、「鉄−ニッケル基合金」とはニッケル
を３０〜４５重量％含有する鉄及びニッケルを基本成分
とする合金であり、ここに適宜、Ｃｒ、Ｍｎ、Ｃｏ、Ｔ
ｉ、■、Ｎｂ％ Ｚｒ、ＭＯ１Ａρ、Ｗ等の副成分や
添加材を５重量％まで添加したものを包括する。11 In the present invention, an "iron-nickel-based alloy" is an alloy whose basic components are iron and nickel containing 30 to 45% by weight of nickel, and where appropriate, Cr, Mn, Co , T
i, ■, Nb% Zr, MO1Aρ, W and other subcomponents and additives are added up to 5% by weight.
シャドウマスクの一般的製造工程は次の通りである：
所定の原料の溶解及び鋳造後、適宜の圧延等の工程を経
由し、そして最終冷間加工にて所定の厚さを有するシー
トとすることによりシャドウマスク素材が製造される。The general manufacturing process for shadow masks is as follows: After melting and casting the specified raw materials, passing through appropriate steps such as rolling, and final cold working to form a sheet with a specified thickness. A shadow mask material is manufactured by.
シャドウマスク素材はエツチング穿孔加工されてフラッ
トマスクとなる。フラットマスクは焼鈍されてプレス成
形性を付与されその後プレスにより球面成形される。球
面成形されたマスクは、黒化処理を施されてシャドウマ
スクとなる。プレス成形性を付与する焼鈍を最終圧延直
後に実施する方式もあり、これはプレアニール法と呼ば
れている。The shadow mask material is etched and perforated to form a flat mask. The flat mask is annealed to give it press formability and is then pressed into a spherical shape. The spherical mask is subjected to a blackening process to become a shadow mask. There is also a method in which annealing to impart press formability is performed immediately after final rolling, and this is called a pre-annealing method.
もう少し詳しく説明すると、先ずシャドウマスク素材の
製造方法として、鉄−ニッケル基合金原料を例えばＶＯ
Ｄ炉で溶製後、インゴットに鋳造し、鍛造後熱間圧延及
び冷間圧延し、その後焼鈍と冷間圧延を繰り返し、所定
の厚みまで最終冷間圧延が施される。その後、スリット
して所定板幅としてシャドウマスク素材を得る。シャド
ウマスク素材は、脱脂後、フォトレジストを両面に塗布
しそしてパターンを焼付けて現像後、エツチング液にて
エツチング穿孔加工され、個々に切断されてフラットマ
スクとなる。To explain in more detail, first, as a method for producing a shadow mask material, an iron-nickel based alloy raw material, for example, VO
After melting in furnace D, it is cast into an ingot, forged, then hot rolled and cold rolled, then annealed and cold rolled repeatedly, and finally cold rolled to a predetermined thickness. Thereafter, it is slit to obtain a shadow mask material having a predetermined width. After degreasing, the shadow mask material is coated with photoresist on both sides, a pattern is baked and developed, and then etched and perforated with an etching solution and cut into individual flat masks.
フラットマスクは、非酸化性雰囲気中で焼鈍されてプレ
ス成形性を付与される（プレアニール法ではこの焼鈍が
エツチング前に最終冷間圧延材に行なわれる）。レベラ
ー加工を経た後、プレスによりマスク形態に球面成形さ
れる。The flat mask is annealed in a non-oxidizing atmosphere to impart press formability (in pre-annealing this annealing is performed on the final cold rolled material before etching). After leveling, it is spherically molded into a mask shape using a press.
そして最後に、球面成形されたマスクは、脱脂後、水蒸
気又は燃焼ガス雰囲気中で黒化処理を施されて表面に黒
色酸化膜を形成する。こうしてシャドウマスクが作製さ
れる。Finally, the spherical mask is degreased and then subjected to a blackening treatment in a steam or combustion gas atmosphere to form a black oxide film on the surface. In this way, a shadow mask is produced.
更には、前述の様な製造工程を取らず、エツチング穿孔
後のフラットマスクについて再結晶焼鈍やプレスによる
球面成形は行わないで、張力を付加した状態でフレーム
等に固定し黒化処理後ブラウン管に組み込む製造方式も
ある。Furthermore, without using the manufacturing process described above, and without recrystallizing the flat mask after perforation by recrystallization or forming it into a spherical surface by pressing, it is fixed to a frame etc. under tension, and after blackening treatment is applied to a cathode ray tube. There is also a manufacturing method that incorporates it.
本発明は、いずれの製造方法にも適用しうることは云う
までもない。It goes without saying that the present invention can be applied to any manufacturing method.
次に本発明を構成する条件の限定理由を説明する。Next, the reasons for limiting the conditions constituting the present invention will be explained.
先に述べたように、スジむらを排除するためには、偏析
が中心部で起こるため、偏析を加熱処理により解消する
ことが基本的には最も効果的である。熱処理は、温度が
高い程有効であるが、温度が高くなると、熱処理中の酸
化が問題となり、これを防止するためには熱処理雰囲気
が非酸化性であることが必要である。具体的にはＮ２あ
るいはＡｒが用いられる。また、還元性雰囲気ならばさ
らに好ましく、Ｎ２あるいはＮ２とＮ２の混合ガスが用
いられるが、経済的にはアンモニア分解ガスが望ましい
。As mentioned above, in order to eliminate uneven streaks, since segregation occurs in the center, it is basically most effective to eliminate segregation by heat treatment. Heat treatment is more effective at higher temperatures; however, as the temperature increases, oxidation during heat treatment becomes a problem, and to prevent this, the heat treatment atmosphere must be non-oxidizing. Specifically, N2 or Ar is used. Further, a reducing atmosphere is more preferable, and N2 or a mixed gas of N2 and N2 is used, but ammonia decomposition gas is economically preferable.
熱処理温度は１０００℃未満ではい（ら長時間加熱して
も偏析の解消が十分でないので、下限を１０００℃とし
た。The lower limit of the heat treatment temperature was set at 1000°C since segregation was not sufficiently eliminated even if heated for a long time.
これにより、従来提唱されたような大きな減面率での鍛
造を行なわなくとも、偏析が完全に解消出来る。As a result, segregation can be completely eliminated without forging with a large area reduction ratio as proposed in the past.
偏析解消のための熱処理と熱間圧延のための加熱を兼用
することが出来る。Heat treatment for eliminating segregation and heating for hot rolling can be used simultaneously.
以上のような方法を用いれば、従来中心偏析が強くシャ
ドウマスク用としては不適当だった連続鋳造による製造
も可能である。連続鋳造を行えば従来不可欠だった鍛造
工程を省略することができ、製造コスト、歩留りの点か
らも有利である。If the method described above is used, it is also possible to manufacture by continuous casting, which has conventionally been unsuitable for use as a shadow mask due to strong center segregation. Continuous casting makes it possible to omit the conventionally indispensable forging process, which is advantageous in terms of manufacturing costs and yield.
次に実施例及び比較例を示し本発明の詳細な説明する。Next, the present invention will be explained in detail with reference to Examples and Comparative Examples.
〈実施例及び比較例〉
鉄−ニッケル基合金としてはアンバー（３６％Ｎｉ−残
Ｆｅ）を用いた。合金をＶＯＤ炉で溶製後、連続鋳造で
スラブとした。次に第１表に示す条件で熱処理を行い熱
間圧延を行った。（偏析解消のための熱処理と熱間圧延
のための加熱を兼ねた。）
その後、酸洗、冷間圧延、焼鈍、冷間圧延、焼鈍、冷間
圧延により、板厚０．１５ｍｍのシャドウマスク素材を
製造した。このようにして製造された試料を実際に高精
細マスクにエツチング穿孔し、スジむらの評価を行った
。その結果を第１表に併せて示す。<Examples and Comparative Examples> Amber (36% Ni-remaining Fe) was used as the iron-nickel based alloy. After melting the alloy in a VOD furnace, it was made into a slab by continuous casting. Next, heat treatment was performed under the conditions shown in Table 1, and hot rolling was performed. (Heat treatment was used to eliminate segregation and heating for hot rolling.) After that, a shadow mask with a thickness of 0.15 mm was processed by pickling, cold rolling, annealing, cold rolling, annealing, and cold rolling. manufactured the material. The sample thus produced was actually etched into a high-definition mask, and the streak unevenness was evaluated. The results are also shown in Table 1.
第１表から明らかなように、本発明例は高精細マスクに
おいてもスジむらは発生せず、酸化も問題にならない。As is clear from Table 1, the examples of the present invention do not cause uneven streaks even in high-definition masks, and oxidation does not pose a problem.
及朋Ｊと弘里
このように、鉄−ニッケル基合金素材を鋳造後に、特定
の条件で熱処理することにより支障なく成分偏析による
スジむらを迅速に且つ完全に解消することができる。こ
のため、エツチング孔を精密に生成でき、しかも連続鋳
造材も高精細マスクとして使用できるようになり、カラ
ーテレビやコンピューターデイスプレィ用カラーブラウ
ン管の高画質化と低コスト化に大きく貢献する。Oiho J and Hirosato As described above, by heat-treating an iron-nickel based alloy material under specific conditions after casting, it is possible to quickly and completely eliminate streaks due to component segregation without any problems. For this reason, etching holes can be created precisely, and continuous casting materials can also be used as high-definition masks, greatly contributing to higher image quality and lower costs for color cathode ray tubes for color televisions and computer displays.
Claims (2)
非酸化性雰囲気もしくは還元性雰囲気中で１０００℃以
上且つ融点以下の温度で熱処理し、その後シート素材と
することを特徴とする、エッチング時のスジむらの発生
を抑制しうるシャドウマスク用鉄−ニッケル基合金素材
の製造方法。(1) After casting the iron-nickel based alloy for the shadow mask,
Iron-nickel for shadow masks that can suppress the occurrence of uneven streaks during etching, which is heat treated at a temperature of 1000°C or higher and lower than the melting point in a non-oxidizing or reducing atmosphere, and then made into a sheet material. Method for manufacturing base alloy materials.
処理する特許請求の範囲第１項記載のシャドウマスク用
鉄−ニッケル基合金素材の製造方法。(2) A method for producing an iron-nickel-based alloy material for a shadow mask according to claim 1, which comprises heat-treating an iron-nickel-based alloy produced by continuous casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32834089A JPH03191024A (en) | 1989-12-20 | 1989-12-20 | Manufacture of iron-nickel base alloy stock for shadow mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32834089A JPH03191024A (en) | 1989-12-20 | 1989-12-20 | Manufacture of iron-nickel base alloy stock for shadow mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03191024A true JPH03191024A (en) | 1991-08-21 |
Family
ID=18209144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32834089A Pending JPH03191024A (en) | 1989-12-20 | 1989-12-20 | Manufacture of iron-nickel base alloy stock for shadow mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03191024A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222451A (en) * | 1992-02-14 | 1993-08-31 | Hitachi Metals Ltd | Production of ni-fe alloy |
| WO2001073808A1 (en) * | 2000-03-28 | 2001-10-04 | Jeong Sik Kim | Shadow mask and method for manufacturing the same |
| JP2003336088A (en) * | 2002-05-22 | 2003-11-28 | Idemitsu Kosan Co Ltd | Cold-rolling oil composition |
-
1989
- 1989-12-20 JP JP32834089A patent/JPH03191024A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05222451A (en) * | 1992-02-14 | 1993-08-31 | Hitachi Metals Ltd | Production of ni-fe alloy |
| WO2001073808A1 (en) * | 2000-03-28 | 2001-10-04 | Jeong Sik Kim | Shadow mask and method for manufacturing the same |
| GB2370283A (en) * | 2000-03-28 | 2002-06-26 | Jeong Sik Kim | Shadow mask and method for manufacturing the same |
| JP2003336088A (en) * | 2002-05-22 | 2003-11-28 | Idemitsu Kosan Co Ltd | Cold-rolling oil composition |
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