JPH0778270B2 - Method for producing Fe-Ni based alloy excellent in streak unevenness suppressing effect during etching - Google Patents
Method for producing Fe-Ni based alloy excellent in streak unevenness suppressing effect during etchingInfo
- Publication number
- JPH0778270B2 JPH0778270B2 JP20462188A JP20462188A JPH0778270B2 JP H0778270 B2 JPH0778270 B2 JP H0778270B2 JP 20462188 A JP20462188 A JP 20462188A JP 20462188 A JP20462188 A JP 20462188A JP H0778270 B2 JPH0778270 B2 JP H0778270B2
- Authority
- JP
- Japan
- Prior art keywords
- streak unevenness
- alloy
- during etching
- based alloy
- slab
- 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
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、エッチング時のスジむら抑制効果に優れるFe
−Ni系合金の製造方法に関し、特にカラーテレビブラウ
ン管のシャドウマスクや蛍光表示管等の電子機器用材料
として好適に用いられるFe−Ni系合金に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides Fe, which has an excellent effect of suppressing streak unevenness during etching.
The present invention relates to a method for producing a Ni-based alloy, and more particularly to a Fe-Ni-based alloy that is preferably used as a material for electronic devices such as shadow masks for color television Braun tubes and fluorescent display tubes.
なお、本発明のかかるFe−Ni系合金は、シャドウマスク
用36Niアンバー合金、リードフレーム用42Ni合金、低熱
膨張特性や磁気的特性に着目して使用される電子,電磁
用Fe−Ni系合金、および電磁用材料として用いられるパ
ーマロイ合金などのFe−Ni系合金の連続鋳造材によるも
のを対象としている。Incidentally, the Fe-Ni-based alloy of the present invention, 36Ni amber alloy for shadow mask, 42Ni alloy for lead frame, electronic used for the low thermal expansion characteristics and magnetic characteristics, Fe-Ni-based alloy for electromagnetic, Also, it is intended for continuous cast materials of Fe-Ni alloys such as permalloy alloys used as electromagnetic materials.
カラーテレビブラウン管のシャドウマスク素材用鉄−ニ
ッケル合金鋼(Fe−Ni系合金)は、これをフォトエッチ
ング穿孔してシャドウマスクを製造する際に、白すじ模
様すなわり“スジむら”が発生する欠点のあることが指
摘されていた。Iron-nickel alloy steel (Fe-Ni alloy) for shadow mask materials of color TV cathode-ray tubes produces white streaky patterns "streaks" when a shadow mask is manufactured by photo-etching perforation of this steel. It was pointed out that there were drawbacks.
従来、このエッチング時のスジむらの発生を抑制するた
めのいくつかの技術が提案されており、例えば特開昭60
−128253号公報に開示の技術では、普通造塊インゴット
を850℃以上に加熱後、各ヒートでのトータル断面減少
率40%以上の鍛造を施すことにより、ニッケルの成分偏
析部を軽減することを通じ、該スジむらの発生を抑制し
ている。Heretofore, several techniques have been proposed for suppressing the occurrence of streak unevenness during etching.
According to the technology disclosed in Japanese Unexamined Patent Publication No. -128253, after heating an ordinary ingot at 850 ° C. or higher, forging is performed at a total cross-sectional reduction rate of 40% or more in each heat, thereby reducing the nickel segregation portion. The occurrence of the streak unevenness is suppressed.
また、特開昭61−223188号公報に開示の技術は、インゴ
ット製造時の偏析防止あるいは条材製造工程中での熱処
理によるニッケルの拡散処理を施すことにより、ニッケ
ルの偏析率,偏析帯を管理して、エッチングのスジむら
を抑制している。Further, the technology disclosed in Japanese Patent Laid-Open No. 61-223188 controls the segregation rate and segregation zone of nickel by preventing segregation during ingot production or by performing nickel diffusion treatment by heat treatment during the strip manufacturing process. Thus, uneven etching streaks are suppressed.
しかしながら、特開昭60−128253号公報に開示された上
記従来技術は、トータル断面減少率が40%を超えるよう
な鍛造をすることが特徴であるが、一般にこの程度の作
業は普通に行われる負荷であり、かような方法では各種
元素の偏析がなかなか消滅せず、したがって、エッチン
グ時のスジむらの発生を防止するのには不十分であっ
た。However, the above-mentioned conventional technique disclosed in JP-A-60-128253 is characterized in that forging is performed so that the total cross-section reduction rate exceeds 40%, but generally this degree of work is normally performed. This is a load, and segregation of various elements is not easily eliminated by such a method, and thus it was insufficient to prevent the occurrence of streak unevenness during etching.
一方、特開昭61−223188号公報に開示された上記従来技
術は、高温熱処理によるNiの拡散を通じてその成分偏析
を軽減することを特徴としているが、スラブ段階での加
熱に比べ板厚が薄いため酸化ロスが相対的に大きくな
り、歩留り低下が著しくなる点で問題点があった。On the other hand, the above-mentioned conventional technique disclosed in Japanese Patent Laid-Open No. 61-223188 is characterized by reducing the segregation of its components through the diffusion of Ni by high temperature heat treatment, but the plate thickness is thinner than the heating at the slab stage. Therefore, there is a problem in that the oxidation loss is relatively large and the yield is significantly reduced.
また、これらの従来技術は、素材がいずれも普通造塊イ
ンゴットであり、そのため凝固組織には特に問題はない
ものの製品の歩留りが低く、コスト高になるという問題
点があった。Further, these conventional techniques have a problem that the yield is low and the cost is high, although the material is an ordinary ingot, and therefore there is no particular problem with the solidification structure.
以上述べたように、各従来技術は、いずれもエッチング
時のスジむらを完全に克服することができないばかり
か、安価な製品を工業的に製造することができていない
のが実情であった。As described above, none of the conventional techniques can completely overcome the streak unevenness at the time of etching, and it has not been possible to industrially manufacture an inexpensive product.
本発明の目的は、かかる斯界の実情に鑑み、エッチング
時にスジむらが発生することのない合金材料、すなわち
Niを30〜80%含有するFe−Ni系合金を連続鋳造材を使っ
て製造する方法を提案するところにある。An object of the present invention is, in view of the circumstances of the art, an alloy material that does not cause streaking during etching, that is,
We are proposing a method for manufacturing a Fe-Ni alloy containing 30 to 80% Ni using a continuous casting material.
そこで、本発明者らは、上述の目的を実現すべく、Fe−
Ni系合金のスジむらについて種々研究を行った。その結
果、探り得たスジむらの原因として、CやSi,Mn,Crな
どの不純物元素の成分偏析、結晶組織の相違、が主た
るものであることを突きとめた。Therefore, the present inventors have made Fe-
Various studies were conducted on the streak unevenness of Ni-based alloys. As a result, they found that the main causes of the uneven streaks that were found were component segregation of impurity elements such as C, Si, Mn, and Cr, and differences in crystal structure.
たとえば、CやSi,Mn,Crなどの不純物元素の成分偏析部
分は、他の部分に比べると、エッチングの速度が変わる
ため、フォトエッチング穿孔時に孔形状の差異を発生し
てスジむらの原因となるのである。For example, in the component segregated portion of the impurity element such as C, Si, Mn, and Cr, the etching speed changes as compared with the other portions, so that the difference in the hole shape is caused during the photoetching perforation, which causes streak unevenness. It will be.
一方、結晶組織の相違については、たとえば、(100)
面が多く配向している個所は、他の部分に比べると、エ
ッチングの速度が速くなって、フォトエッチング穿孔時
に孔形状の差異を生じる。これは、鋳造時の凝固組織,
すなわち特定方位を有する柱状組織の存在に起因してお
り、この柱状組織は以後の加工,熱処理段階でも消滅す
ることなく、形を変えながら圧延方向に伸ばされ、最終
的にスジむらの原因をつくることになるのである。On the other hand, regarding the difference in crystal structure, for example, (100)
A portion where a large number of planes are oriented has a higher etching rate than other portions, resulting in a difference in hole shape during photoetching perforation. This is the solidification structure during casting,
That is, it is caused by the existence of a columnar structure having a specific orientation, and this columnar structure is elongated in the rolling direction while changing the shape without disappearing in the subsequent processing and heat treatment steps, and finally causes the streak unevenness. It will be.
このことから、本発明では、成分偏析の抑制のみならず
結晶組織の調整をも狙って、上述の課題の克服を試み
た。From this, in the present invention, an attempt was made to overcome the above-mentioned problems, aiming at not only suppression of component segregation but also adjustment of the crystal structure.
すなわち、その課題克服の手段として本発明は、 第1に、等軸晶率が30%以下のスラブの場合として、Ni
を30〜80wt%含み残部が主としてFeであるFe−Ni系合金
の該連続鋳造スラブを、1100℃以上の温度で1時間以上
加熱保持すること、 そして、第2に、等軸晶率が30%を超えるスラブの場合
には、この連続鋳造スラブを950℃以上の温度で1時間
以上加熱保持することとして、エッチング時のスジむら
制御効果に優れるFe−Ni系合金の製造方法、 を提案する。That is, as a means for overcoming the problem, the present invention firstly proposes, as a case of a slab whose equiaxed crystal ratio is 30% or less,
Of 80 to 80% by weight and the balance being mainly Fe, the continuous cast slab of Fe-Ni alloy is heated and held at a temperature of 1100 ° C. or higher for 1 hour or more, and secondly, the equiaxed crystal ratio is 30 or more. In the case of a slab exceeding 100%, the continuous cast slab is heated and held at a temperature of 950 ° C. or higher for 1 hour or more, and a method for producing an Fe-Ni alloy having an excellent streak unevenness control effect during etching is proposed. .
さて、本発明において、素材についてのNi含有量の下限
を30wt%(以下は単に「%」で略記する)としたのは、
Fe−Ni系合金を上記機能材として使用する場合にこのNi
含有量が30%未満では十分な電磁気特性が発揮されず実
用に耐えないためであり、逆にNiが80%を超える場合、
電子,電磁用材料としての品質が劣化するためである。In the present invention, the lower limit of the Ni content of the material is set to 30 wt% (hereinafter simply abbreviated as “%”)
When using a Fe-Ni alloy as the above functional material,
This is because if the content is less than 30%, sufficient electromagnetic characteristics are not exhibited and it cannot withstand practical use. Conversely, if Ni exceeds 80%,
This is because the quality of electronic and electromagnetic materials deteriorates.
本発明において採用するFe−Ni系合金の素材は、通常の
造塊材ではなく連続鋳造材とする。このように被処理材
を、連続鋳造材(スラブ)とする理由は、普通造塊材に
比べると、連続鋳造スラブの方がマクロ的成分偏析が少
なく、かつ加工,熱処理特性に優れるためである。The Fe-Ni alloy material used in the present invention is not an ordinary ingot material but a continuous casting material. The reason why the material to be treated is a continuous cast material (slab) is that the continuous cast slab has less macroscopic component segregation and is excellent in processing and heat treatment characteristics as compared with the ordinary ingot material. .
なお、この連続鋳造スラブの場合、鋳片断面の結晶組織
は両側から柱状晶が発達した偏析の少ないものになる
が、その反面で“スジむら”に着目した場合次のような
現象も見られた。In addition, in the case of this continuous cast slab, the crystal structure of the cross section of the cast slab has a small amount of segregation in which columnar crystals have developed from both sides, but on the other hand, when attention is paid to "streak unevenness", the following phenomenon is also observed. It was
すなわち、このスジむらは、成分偏析の他に、鋳造時の
柱状晶が、その後の加工,熱処理で消滅することなく、
形を変化させながら圧延加工により圧延方向に伸ばされ
たものが起因していることが判った。しかも、本発明者
らの研究によれば、最終板厚にまで加工された際に特定
方位をもつ柱状晶の長さの短いものは、その幅,長さも
相対的に小さくなり、エッチング穿孔時に発生する部分
的なエッチング速度の差は見られず、したがって、連続
したスジむらとしては観察されなかった。ところが、こ
の柱状晶(結晶粒)の長さが長いものは、加工を経ても
その幅および長さに相当するものがそのまま,すなわち
大きいまま残存し、これがエッチング時のスジむらとな
ったのである。That is, the streak unevenness is not only the segregation of the components but also the columnar crystals at the time of casting not disappearing by the subsequent processing and heat treatment.
It was found that this was caused by what was stretched in the rolling direction by rolling while changing the shape. Moreover, according to the research conducted by the present inventors, when the columnar crystals having a specific orientation when processed to the final plate thickness have a short length, the width and the length thereof are relatively small, and when the holes are formed by etching, No difference in the partial etching rate that occurred was observed and, therefore, was not observed as continuous stripe unevenness. However, in the columnar crystals (crystal grains) having a long length, the ones corresponding to the width and length of the columnar crystals remained as they were even after the processing, that is, remained large, which resulted in stripe unevenness during etching. .
このスジむらが出るか否かの限界となる柱状晶の長さ
は、鋳片の等軸晶率にして30%が境となる。The length of the columnar crystals, which is the limit of whether or not streaks appear, is 30% in terms of the equiaxed crystal ratio of the slab.
本発明は、こうした両者の問題点をともに克服する方法
として、等軸晶率30%を境にする好適な熱処理法を提供
して、いずれの場合もスジむらが出ないようにしたので
ある。As a method for overcoming both of these problems, the present invention provides a suitable heat treatment method with an equiaxed crystal ratio of 30% as a boundary so that streak unevenness does not occur in any case.
次に、スラブ熱処理温度を1100℃以上とした理由は、等
軸晶率30%以下のスラブにおいては、安定な方位をもつ
柱状晶の影響が強いため、1100℃以下の低い温度では、
スジむらが出ないようにするべくかかる柱状晶を分断
し、ランダム化させるには不十分なためである。Next, the reason why the slab heat treatment temperature is set to 1100 ° C or higher is that, in a slab having an equiaxed crystal ratio of 30% or less, the influence of columnar crystals having a stable orientation is strong.
This is because it is not sufficient to divide and randomize the columnar crystals in order to prevent stripe unevenness.
これに対し、等軸晶率30%を超えると、この柱状晶が熱
間圧延後も残るようなことがなく、したがって、スジむ
らの発生機会が少ないので950℃という低い熱処理温度
でもよいのである。ただし、この熱処理温度が950℃以
下になると、偏析の軽減が十分に行なわれず、偏析を原
因とするスジむらの発生が生じるようになる。On the other hand, when the equiaxed crystal ratio exceeds 30%, the columnar crystals do not remain even after hot rolling. Therefore, the occurrence of streak unevenness is small, so a heat treatment temperature as low as 950 ° C. may be used. . However, when the heat treatment temperature is 950 ° C. or lower, segregation is not sufficiently reduced, and streak unevenness due to segregation occurs.
なお、本発明においては、上述のように連続鋳造鋳片の
等軸晶率をコントロールするために、連続鋳造機のモー
ルドもしくは2次冷却帯に電磁攪拌装置(EMS)を設置
し、電磁力を調整することにより、鋳片内の未凝固溶湯
を攪拌して等軸晶率を目標のものにする。あるいは、注
湯温度のコントロール,超音波振動によっても等軸晶率
を目標のものにすることができる。In the present invention, in order to control the equiaxed crystal ratio of the continuously cast slab as described above, an electromagnetic stirrer (EMS) is installed in the mold or the secondary cooling zone of the continuous casting machine, and electromagnetic force is applied. By adjusting, the unsolidified molten metal in the slab is stirred to bring the equiaxed crystal ratio to a target. Alternatively, the equiaxed crystal ratio can be targeted by controlling the pouring temperature and ultrasonic vibration.
以上説明したように本発明は、Fe−Ni系合金に対し、連
続鋳造時での凝固をコントロールしかつ連鋳スラブに対
し適正な熱処理を施すことにより、結晶の均質化および
成分偏析の軽減が同時に実現できる。そのため、本発明
においては、エッチング時のスジむらを発生することの
ないFe−Ni系合金を製造することができる。As described above, the present invention, Fe-Ni-based alloy, by controlling the solidification during continuous casting and by subjecting the continuous casting slab to an appropriate heat treatment, homogenization of crystals and reduction of component segregation can be achieved. Can be realized at the same time. Therefore, in the present invention, it is possible to produce a Fe-Ni-based alloy that does not cause stripe unevenness during etching.
第1表に、この実施例で用いたFe−Ni系合金の化学組成
および等軸晶率などの実施の条件とその結果を示す。Table 1 shows the conditions of implementation and the results such as the chemical composition and equiaxed crystal ratio of the Fe-Ni alloy used in this example.
この第1表に示した特に本発明の対象とする合金は、電
気炉で溶解した溶融金属を、引き続いてAOD法またはVOD
法により精錬し、次いで連続鋳造機にてこれに付帯させ
た電磁攪拌装置を作動させ等軸晶率を制御しながら鋳造
し、第1表に示すような所定の連鋳スラブを得た。The alloys shown in Table 1 and specifically targeted by the present invention are obtained by melting molten metal in an electric furnace, followed by AOD method or VOD.
After refining by the method, then a continuous casting slab as shown in Table 1 was obtained by operating a magnetic stirrer attached to the continuous casting machine while controlling the equiaxed crystal ratio.
次いで、この連鋳スラブを冷却し手入れを施した後、95
0℃以上の所定の温度で1時間以上加熱保持し、その後
熱間圧延を施して5.5mm厚のコイルとした。その熱間圧
延以降は常法に従い冷間圧延と熱処理を適宜組合わせた
常法に従う処理を行って最終製品を得た。Then, this continuous cast slab is cooled and cared for, and then 95
The coil was heated and held at a predetermined temperature of 0 ° C. or higher for 1 hour or longer, and then hot-rolled to obtain a coil having a thickness of 5.5 mm. After the hot rolling, the final product was obtained by performing a treatment according to a conventional method in which cold rolling and heat treatment were appropriately combined according to a conventional method.
このようにして製造した供試材料を、塩化第二鉄溶液
(比重1.45,50℃)で実際のフォトエッチング開孔を行
い、スジむら発生の有無を調査した。The test material produced in this manner was subjected to actual photoetching opening with a ferric chloride solution (specific gravity: 1.45, 50 ° C.) to investigate whether streaks occurred.
その結果は第1表に示すとおりであった。The results are shown in Table 1.
この第1表に示すところから判るように、本発明法に従
って製造したFe−Ni系合金は、同一組成の従来法によっ
て製造した普通造塊材のFe−Ni系合金(比較例)に比べ
ると、エッチング時のスジむらの発生はほとんど見られ
ず、エッチング用素材として優れた合金であることが明
らかとなった。 As can be seen from Table 1, the Fe-Ni-based alloy produced according to the method of the present invention is compared with the Fe-Ni-based alloy (comparative example) of the ordinary ingot produced by the conventional method having the same composition. However, it was revealed that streak unevenness was hardly generated during etching, and that it was an excellent alloy as a material for etching.
以上説明したように、本発明方法によって製造したFe−
Ni系合金は、フォトエッチング穿孔後のスジむらが全く
無いため、電子,電磁材料として望ましい性質を有する
Fe−Ni系合金を安価に提供することができる。As described above, Fe- produced by the method of the present invention
Ni-based alloys have no streaks after photo-etching and therefore have desirable properties as electronic and electromagnetic materials.
Fe-Ni alloy can be provided at low cost.
Claims (2)
るFe−Ni系合金の等軸晶率30%以下の連続鋳造スラブ
を、1100℃以上の温度で1時間以上加熱保持することを
特徴とするエッチング時のスジむら抑制効果に優れるFe
−Ni系合金の製造方法。1. A continuous cast slab having an equiaxed crystal ratio of 30% or less of an Fe-Ni alloy having a Ni content of 30 to 80 wt% and the balance being mainly Fe is heated and maintained at a temperature of 1100 ° C. or more for 1 hour or more. Fe, which has an excellent effect of suppressing streak unevenness during etching, characterized by
-A method for manufacturing a Ni-based alloy.
るFe−Ni系合金を連続鋳造すると共にこの鋳造に際して
電磁攪拌,注湯温度のコントロールまたは超音波振動を
施すことにより鋳片の等軸晶率が30%を超える連続鋳造
スラブを調製し、この連続鋳造スラブを950℃以上の温
度で1時間以上加熱保持することを特徴とするエッチン
グ時のスジむら抑制効果に優れるFe−Ni系合金の製造方
法。2. A Fe-Ni alloy containing 30 to 80 wt% of Ni and the balance being mainly Fe is continuously cast, and at the time of this casting, electromagnetic stirring, control of pouring temperature or ultrasonic vibration is applied to form a slab. Fe-Ni, which has an excellent effect of suppressing streak unevenness during etching, characterized in that a continuously cast slab having an equiaxed crystal ratio of more than 30% is prepared and the continuously cast slab is heated and held at a temperature of 950 ° C or higher for 1 hour or more. Of manufacturing a base alloy.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20462188A JPH0778270B2 (en) | 1988-08-19 | 1988-08-19 | Method for producing Fe-Ni based alloy excellent in streak unevenness suppressing effect during etching |
CA 607827 CA1319589C (en) | 1988-08-19 | 1989-08-09 | Method of producing fe-ni series alloys having improved effect for restraining streaks during etching |
KR1019890011655A KR930006300B1 (en) | 1988-08-19 | 1989-08-16 | Manufacture of fe-ni alloy having excellent suppression effect for striped unevenness at the time of etching |
FR8911041A FR2641546B1 (en) | 1988-08-19 | 1989-08-18 | PROCESS FOR PRODUCING FE-NI SERIES ALLOYS HAVING AN IMPROVED MODERATOR EFFECT OF THE PRESENCE OF TRAILS DURING ENGRAVING |
DE19893927310 DE3927310C2 (en) | 1988-08-19 | 1989-08-18 | Process for the production of plates of Fe-Ni alloys suitable for shadow masks of cathode ray tubes with improved resistance to etching strips |
FR909000060A FR2641796B1 (en) | 1988-08-19 | 1990-01-04 | PROCESS FOR PRODUCING FE-NI-B SERIES ALLOYS HAVING IMPROVED MODERATOR EFFECT OF THE PRESENCE OF TRAILS DURING ENGRAVING |
US07/686,847 US5325911A (en) | 1988-08-19 | 1991-04-17 | Method of producing Fe-Ni series alloys having improved effect for restraining streaks during etching |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20462188A JPH0778270B2 (en) | 1988-08-19 | 1988-08-19 | Method for producing Fe-Ni based alloy excellent in streak unevenness suppressing effect during etching |
Publications (2)
Publication Number | Publication Date |
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JPH0254743A JPH0254743A (en) | 1990-02-23 |
JPH0778270B2 true JPH0778270B2 (en) | 1995-08-23 |
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JP20462188A Expired - Lifetime JPH0778270B2 (en) | 1988-08-19 | 1988-08-19 | Method for producing Fe-Ni based alloy excellent in streak unevenness suppressing effect during etching |
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JP4795900B2 (en) * | 2000-09-29 | 2011-10-19 | 日本冶金工業株式会社 | Fe-Ni permalloy alloy |
JP6300574B2 (en) * | 2014-02-28 | 2018-03-28 | 新報国製鉄株式会社 | High rigidity low thermal expansion casting |
CN111318658A (en) * | 2020-03-24 | 2020-06-23 | 山西太钢不锈钢股份有限公司 | Invar alloy and continuous casting production method thereof |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6056053A (en) * | 1983-09-07 | 1985-04-01 | Nippon Mining Co Ltd | Iron-nickel alloy for shadow mask which suppresses generation of uneven stripe during etching |
JPS60128253A (en) * | 1983-12-15 | 1985-07-09 | Nippon Mining Co Ltd | Manufacture of iron-nickel alloy for shadow mask which inhibits streaking during etching |
JPS613835A (en) * | 1984-06-19 | 1986-01-09 | Nippon Mining Co Ltd | Manufacture of fe-ni alloy |
JPS61223188A (en) * | 1985-03-28 | 1986-10-03 | Nippon Mining Co Ltd | Iron-nickel alloy for shadow mask which suppresses generation of uneven stripe during etching |
JPS6119737A (en) * | 1985-05-20 | 1986-01-28 | Toshiba Corp | Shadow mask base plate and its preparation |
JP2510154B2 (en) * | 1986-01-10 | 1996-06-26 | 川崎製鉄株式会社 | Fe-Ni alloy cold rolled sheet and method for producing the same |
JPH0785825B2 (en) * | 1986-11-20 | 1995-09-20 | 新日本製鐵株式会社 | Method for producing Ni-containing steel sheet having excellent low temperature toughness |
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1988
- 1988-08-19 JP JP20462188A patent/JPH0778270B2/en not_active Expired - Lifetime
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