JPH1030157A - Iron-chromium-nickel alloy stock excellent in press formability, and its production - Google Patents
Iron-chromium-nickel alloy stock excellent in press formability, and its productionInfo
- Publication number
- JPH1030157A JPH1030157A JP8205453A JP20545396A JPH1030157A JP H1030157 A JPH1030157 A JP H1030157A JP 8205453 A JP8205453 A JP 8205453A JP 20545396 A JP20545396 A JP 20545396A JP H1030157 A JPH1030157 A JP H1030157A
- Authority
- JP
- Japan
- Prior art keywords
- grain size
- alloy material
- surface roughness
- rmax
- production
- 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.)
- Granted
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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Metal Rolling (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プレス性の良好な
Ｆｅ−Ｃｒ−Ｎｉ合金素材及びその製造方法に関するも
のであり、特には電子銃部品、例えば電子銃電極材料に
使用される非磁性ステンレス鋼において絞り加工のため
のプレス加工性を向上させたＦｅ−Ｃｒ−Ｎｉ系合金素
材及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Fe--Cr--Ni alloy material having good pressability and a method for producing the same, and more particularly to a nonmagnetic stainless steel used for an electron gun component, for example, an electron gun electrode material. The present invention relates to a Fe-Cr-Ni-based alloy material having improved press workability for drawing in steel and a method for producing the same.
【０００２】[0002]
【従来の技術】一般に、受像管などに用いられる電子銃
部品は、板厚０．０５〜０．５ｍｍ程度の非磁性ステン
レス鋼であるＦｅ−Ｃｒ−Ｎｉ系合金材を、プレス加工
により所定形状に絞り加工されることにより作られる。
絞り性を向上させるため、特にバーリング成形（丸い穴
をあけてつばを出す方法）を容易にするため圧延加工率
や焼鈍条件を検討した技術（特願平６−２５７２５３）
が提案されている。2. Description of the Related Art In general, electron gun parts used for picture tubes and the like are made of a nonmagnetic stainless steel Fe-Cr-Ni-based alloy material having a thickness of about 0.05 to 0.5 mm by pressing into a predetermined shape. It is made by drawing.
Technology for examining the rolling ratio and annealing conditions to improve the drawability, especially for facilitating burring (a method of forming a brim by drilling a round hole) (Japanese Patent Application No. 6-257253).
Has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】しかし、近年プレス加
工速度の向上が一層追求されるとともに、プレス時に使
用される油も低粘度で脱脂し易いものが用いられる傾向
にあり、絞り加工にとっては絞り加工割れの発生し易い
厳しい条件となってきた。そのため、従来の材料では必
ずしも満足できる結果が得られず、プレス加工性の一層
の改善が強く望まれている。本発明の課題はプレス性の
良好な電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系合金素材及びそ
の製造方法の開発である。However, in recent years, as the press working speed has been further improved, the oil used at the time of pressing tends to be low in viscosity and easily degreased. Severe conditions are apt to occur in processing cracks. Therefore, satisfactory results cannot always be obtained with conventional materials, and further improvement in press workability is strongly desired. An object of the present invention is to develop a Fe—Cr—Ni alloy material for electron gun parts having good pressability and a method for producing the same.
【０００４】[0004]
【課題を解決するための手段】かかる課題に対処すべく
研究を重ねた結果、Ｆｅ−Ｃｒ−Ｎｉ系合金素材におい
て、結晶粒度をオーステナイト結晶粒度で７．０〜１
２．０とし、金属表面の粗さを中心線平均粗さ（Ｒａ）
で０．０５〜０．２５μｍ、最大高さ（Ｒmax ）で３．
５μｍ以下とすることによって、絞り加工性をさらに改
善できることが判明した。従来、絞り加工性との関連で
表面粗さの定量化、さらにはＲａ、Ｒmax の２つの指標
の定量化により改善が得られるという知見はない。As a result of repeated studies to solve such problems, the Fe-Cr-Ni alloy material has a grain size of 7.0 to 1 as austenite grain size.
2.0 and the roughness of the metal surface as the center line average roughness (Ra)
And 0.05 to 0.25 μm at maximum height (Rmax).
It has been found that drawing workability can be further improved by setting the thickness to 5 μm or less. Heretofore, there is no finding that improvement can be obtained by quantifying the surface roughness in relation to the drawability and further by quantifying the two indices Ra and Rmax.
【０００５】この知見に基づいて、本発明は（１）重量
％で、Ｃｒ１５〜２０％、Ｎｉ９〜１５％、残部Ｆｅ及
び不可避的不純物からなる合金素材であって、結晶粒度
がオーステナイト結晶粒度で表してＮｏ．７〜１２であ
りそして中心線平均粗さ（Ｒａ）が０．０５μｍ〜０．
２５μｍかつ最大高さ（Ｒmax ）が３．５μｍ以下であ
る表面粗さを有することを特徴とするプレス性の良好な
電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系合金素材、及び（２）
重量％で、Ｃｒ１５〜２０％、Ｎｉ９〜１５％、残部Ｆ
ｅ及び不可避的不純物からなる合金材を最終焼鈍で結晶
粒度がオーステナイト結晶粒度で表してＮｏ．７〜１２
であるよう調整しそして中心線平均粗さ（Ｒａ）が０．
０５μｍ〜０．２５μｍかつ最大高さ（Ｒmax ）が３．
５μｍ以下であるであるよう素材表面粗さをコントロー
ルすることを特徴とするプレス性の良好な電子銃部品用
Ｆｅ−Ｃｒ−Ｎｉ系合金素材の製造方法を提供する。表
面粗さのコントロールは、機械的な表面研摩もしくは圧
延により実施することができる。プレス加工の直前に機
械的な表面研摩を実施することが推奨される。Based on this finding, the present invention relates to (1) an alloy material consisting of 15 to 20% of Cr, 9 to 15% of Ni, the balance of Fe and unavoidable impurities, and having a grain size of austenite grain size. No. 7 to 12 and a center line average roughness (Ra) of 0.05 μm to 0.1 μm.
Fe-Cr-Ni alloy material for electron gun parts having good pressability, characterized by having a surface roughness of 25 µm and a maximum height (Rmax) of 3.5 µm or less; and (2)
By weight%, Cr 15-20%, Ni 9-15%, balance F
e and an alloy material comprising unavoidable impurities have a grain size expressed by austenite grain size in the final annealing. 7-12
And the center line average roughness (Ra) is 0.
05 μm to 0.25 μm and the maximum height (Rmax) is 3.
Provided is a method for producing an Fe-Cr-Ni-based alloy material for electron gun parts having good pressability, characterized by controlling the material surface roughness so as to be 5 µm or less. The surface roughness can be controlled by mechanical surface polishing or rolling. It is recommended that mechanical surface polishing be performed immediately before pressing.
【０００６】[0006]
【発明の実施の形態】本発明の電子銃部品用Ｆｅ−Ｃｒ
−Ｎｉ系合金素材の合金成分限定理由並びに結晶粒度及
び表面粗さの限定理由を以下に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Fe-Cr for electron gun parts according to the present invention
The reasons for limiting the alloy components of the Ni-based alloy material and the reasons for limiting the crystal grain size and the surface roughness will be described below.
【０００７】（Ｃｒ）：電子銃用部品としては非磁性と
いうことが要求される。通常、非磁性であるためには透
磁率が１．００５以下であることが要求されており、こ
れを満たすためにはＣｒ量を適正範囲に調整することが
必要である。よってその成分範囲を１５〜２０％とす
る。 （Ｎｉ）：Ｎｉが９％より少ないと磁性が高くなりすぎ
る上に、加工性を阻害する。また１５％より多く含有す
る場合も、加工性が阻害されるうえに原価高となる。よ
ってその成分範囲を９〜１５％とする。[0007] (Cr): Non-magnetic is required as a component for an electron gun. Usually, in order to be non-magnetic, the magnetic permeability is required to be 1.005 or less, and in order to satisfy this, it is necessary to adjust the amount of Cr to an appropriate range. Therefore, the component range is set to 15 to 20%. (Ni): If Ni is less than 9%, the magnetism becomes too high and the workability is impaired. Also, when the content is more than 15%, the workability is impaired and the cost increases. Therefore, the component range is set to 9 to 15%.
【０００８】本発明の電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系
合金素材は、その結晶粒度をオーステナイト結晶粒度で
表して７〜１２に調整される。Ｎｏ．７〜１２にする理
由は、７より小さいとプレス時にプレス品表面に肌荒れ
を生じ、１２より大きいと絞り性が低下し、割れが発生
し易くなるためである。The grain size of the Fe—Cr—Ni alloy material for an electron gun component of the present invention is adjusted to 7 to 12 by expressing the grain size by austenite grain size. No. The reason for setting it to 7 to 12 is that if it is smaller than 7, roughening occurs on the surface of the pressed product at the time of pressing, and if it is larger than 12, the drawability is reduced and cracks are easily generated.
【０００９】また、本発明の電子銃部品用Ｆｅ−Ｃｒ−
Ｎｉ系合金素材は、中心線平均粗さ（Ｒａ）が０．０５
〜０．２５μｍかつ最大高さ（Ｒmax ）が３．５μｍ以
下である表面粗さを有するものとされる。粗さの測定は
表面粗さ測定器によって行った。中心線平均粗さ（Ｒ
ａ）を０．０５〜０．２５μｍにする理由は、０．０５
μｍより小さいとプレス性の改善が認められず、０．２
５μｍを超えるとプレス性の改善は飽和し、逆に表面が
荒れるためである。最大高さ（Ｒmax ）を３．５μｍ以
下にする理由は、３．５μｍを超えると割れが発生し易
くなりプレス性の改善が見られなくなるためである。プ
レス性の改善は、プレス加工時に材料表面の凹凸に油が
入り、油持ちが良くなるためと考えられる。Further, according to the present invention, Fe-Cr-
Ni-based alloy material has a center line average roughness (Ra) of 0.05
It has a surface roughness of .about.0.25 .mu.m and a maximum height (Rmax) of 3.5 .mu.m or less. The roughness was measured by a surface roughness measuring device. Center line average roughness (R
The reason for setting a) to 0.05 to 0.25 μm is that 0.05)
If it is less than μm, no improvement in pressability is observed,
If the thickness exceeds 5 μm, the improvement in pressability is saturated, and conversely, the surface becomes rough. The reason why the maximum height (Rmax) is set to 3.5 μm or less is that if the maximum height (Rmax) exceeds 3.5 μm, cracks are liable to occur and no improvement in pressability is observed. It is considered that the pressability is improved because oil enters the unevenness of the material surface during the press working, and the oil retention is improved.
【００１０】本発明の電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系
合金は、例えば下記のようにして製造される。まず上述
した各含有成分の組成比を満足させた合金成分を溶解、
鋳造し、ついで、熱間鍛造または圧延を施した後、冷間
圧延と焼鈍を繰り返して所定の厚さに仕上げる。この
際、最終焼鈍でオーステナイト結晶粒度が７〜１２にな
るように調整する。中心線平均粗さ（Ｒａ）及び最大高
さ（Ｒmax ）のコントロールは最終板厚になった材料を
バフ、砥石、カッター等で機械的に表面研摩することに
より実施することもでき、また最終圧延時に表面粗さを
コントロールすることによっても実施できる。The Fe—Cr—Ni alloy for an electron gun component according to the present invention is manufactured, for example, as follows. First, dissolve the alloy component satisfying the composition ratio of each component described above,
After casting and then hot forging or rolling, cold rolling and annealing are repeated to finish to a predetermined thickness. At this time, the austenite grain size is adjusted to be 7 to 12 in the final annealing. The control of the center line average roughness (Ra) and the maximum height (Rmax) can be carried out by mechanically polishing the material having the final thickness with a buff, a grindstone, a cutter or the like. Sometimes, it can be carried out by controlling the surface roughness.
【００１１】[0011]
【実施例】表１に示す組成の合金成分をそれぞれ溶解し
てインゴットに鋳造し、ついで熱間圧延を施した後、冷
間圧延と焼鈍を繰り返して板厚０．４ｍｍの焼鈍材を製
造した。この焼鈍材を各種の粗さを有する研磨材及びＳ
ｉＣを含浸させた羽布で機械的に表面研摩を行なった。
また、これとは別に、最終圧延時に各種の粗さを有する
圧延ロール（ダルロール）を用いて圧延し、表面粗さの
異なる材料を製造し、最終焼鈍を行なったものも製造し
た。そして、これらの材料のプレス性（絞り性）を調べ
るために限界絞り比を求めた。この限界絞り比は、荷重
深絞り性試験によりカップ壁強さとフランジ変形力を求
め、その交点から求めたものである。なお、プレス時の
潤滑剤としては水溶性ワックスを用いた。これとは別
に、絞り比１．３３で全ての供試材を平底ポンチを用い
て絞り、加工品に肌荒れがあるかどうかの評価を行なっ
た。結果を表１に併記した。EXAMPLE Each alloy component having the composition shown in Table 1 was melted, cast into an ingot, and then subjected to hot rolling, and then cold rolling and annealing were repeated to produce an annealed material having a thickness of 0.4 mm. . An abrasive having various roughnesses and S
The surface was mechanically polished with a feather cloth impregnated with iC.
Separately, rolling was performed using rolling rolls (dull rolls) having various roughnesses at the time of final rolling, materials having different surface roughnesses were manufactured, and those subjected to final annealing were also manufactured. Then, in order to examine the pressability (drawability) of these materials, the critical draw ratio was determined. This limit drawing ratio is obtained from the intersection of the cup wall strength and the flange deformation force obtained by the load deep drawing test. Note that a water-soluble wax was used as a lubricant at the time of pressing. Separately, all the test materials were squeezed using a flat-bottom punch at a squeezing ratio of 1.33, and whether or not the processed product was rough was evaluated. The results are shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】表１から明らかなように、本発明合金Ｎ
ｏ．１〜４は、比較合金Ｎｏ．５〜８にくらべいずれも
限界絞り比が大きく、優れた絞り性を示している。ま
た、比較合金Ｎｏ．８とくらべて明らかなように、結晶
粒度が大きすぎる（結晶粒度Ｎｏ．が６と小さい）と肌
荒れの発生が認められ、プレス製品としては不適当であ
る。As is clear from Table 1, the alloy N of the present invention
o. 1 to 4 are comparative alloy Nos. All of them have a larger limit drawing ratio than 5 to 8 and show excellent drawability. In addition, the comparative alloy No. As is clear from the comparison with No. 8, when the crystal grain size is too large (the crystal grain size No. is as small as 6), the occurrence of surface roughness is recognized, which is unsuitable as a pressed product.
【００１４】[0014]
【発明の効果】以上のように、本発明のＦｅ−Ｃｒ−Ｎ
ｉ系合金素材は、プレス性を著しく向上させ、厳しいプ
レス条件で加工されても絞り加工割れの発生しにくい材
料である。従って、電子銃部品の加工に対する今後の厳
しい要求に対応することができる。As described above, the Fe-Cr-N of the present invention
The i-based alloy material is a material that significantly improves pressability and is unlikely to cause drawing cracks even when processed under severe pressing conditions. Therefore, it is possible to meet future severe requirements for processing electron gun parts.
Claims (5)
１５％、残部Ｆｅ及び不可避的不純物からなる合金素材
であって、結晶粒度がオーステナイト結晶粒度で表して
Ｎｏ．７〜１２でありそして中心線平均粗さ（Ｒａ）が
０．０５μｍ〜０．２５μｍかつ最大高さ（Ｒmax ）が
３．５μｍ以下である表面粗さを有することを特徴とす
るプレス性の良好な電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系合
金素材。1. A method according to claim 1, wherein Cr is 15 to 20% and Ni is 9 to 20% by weight.
An alloy material comprising 15%, balance Fe and unavoidable impurities, and the grain size is represented by austenite grain size. Good pressability characterized by having a surface roughness of 7 to 12 and a center line average roughness (Ra) of 0.05 to 0.25 μm and a maximum height (Rmax) of 3.5 μm or less. Fe-Cr-Ni alloy material for electronic gun parts.
１５％、残部Ｆｅ及び不可避的不純物からなる合金材を
最終焼鈍で結晶粒度がオーステナイト結晶粒度で表して
Ｎｏ．７〜１２であるよう調整しそして中心線平均粗さ
（Ｒａ）が０．０５μｍ〜０．２５μｍかつ最大高さ
（Ｒmax ）が３．５μｍ以下であるであるよう素材表面
粗さをコントロールすることを特徴とするプレス性の良
好な電子銃部品用Ｆｅ−Ｃｒ−Ｎｉ系合金素材の製造方
法。2. The composition according to claim 1, wherein the content of Cr is 15 to 20% and the content of Ni is 9 to 20% by weight.
The alloy material consisting of 15%, the balance Fe and unavoidable impurities, was subjected to final annealing and the grain size was expressed as austenite grain size. 7 to 12 and control the surface roughness of the material so that the center line average roughness (Ra) is 0.05 μm to 0.25 μm and the maximum height (Rmax) is 3.5 μm or less. A method for producing an Fe-Cr-Ni-based alloy material for electron gun parts having good pressability, characterized by the following.
研摩により実施することを特徴とする請求項２の方法。3. The method according to claim 2, wherein the control of the surface roughness is performed by mechanical surface polishing.
実施することを特徴とする請求項３の方法。4. The method according to claim 3, wherein a mechanical surface polishing is performed immediately before the pressing.
施することを特徴とする請求項２の方法。5. The method according to claim 2, wherein the control of the surface roughness is performed by rolling.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08205453A JP3095689B2 (en) | 1996-07-17 | 1996-07-17 | Fe-Cr-Ni-based alloy material having good pressability and method for producing the same |
| TW086104903A TW454045B (en) | 1996-07-17 | 1997-04-16 | Iron-chromium-nickel alloy stock excellent in press formability and its production |
| KR1019970022507A KR100237536B1 (en) | 1996-07-17 | 1997-05-31 | The manufacturing method for fe-cr-ni alloy and the same goods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08205453A JP3095689B2 (en) | 1996-07-17 | 1996-07-17 | Fe-Cr-Ni-based alloy material having good pressability and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1030157A true JPH1030157A (en) | 1998-02-03 |
| JP3095689B2 JP3095689B2 (en) | 2000-10-10 |
Family
ID=16507139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08205453A Expired - Fee Related JP3095689B2 (en) | 1996-07-17 | 1996-07-17 | Fe-Cr-Ni-based alloy material having good pressability and method for producing the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3095689B2 (en) |
| KR (1) | KR100237536B1 (en) |
| TW (1) | TW454045B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379477B1 (en) | 1999-09-28 | 2002-04-30 | Nippon Mining & Metals Co., Ltd. | Fe-Cr-Ni alloy for electron gun electrodes and Fe-Cr-Ni alloy sheet for electron gun electrodes |
| US6391254B1 (en) | 1999-07-05 | 2002-05-21 | Nippon Mining & Metals Co., Ltd. | Fe-Cr-Ni alloy for electron gun electrodes |
| US6806635B1 (en) | 1999-09-29 | 2004-10-19 | Nippon Mining And Metals Co., Ltd. | Fe-Ni-Cr- based alloy strip having improved press-formability and used for electrode of electron gun |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05117813A (en) * | 1991-04-18 | 1993-05-14 | Nisshin Steel Co Ltd | Stainless steel for metal gasket having excellent formability and fatigue characteristic and this manufacture |
| JPH05202448A (en) * | 1991-12-27 | 1993-08-10 | Nisshin Steel Co Ltd | Improved material for electron tube |
| JPH0892691A (en) * | 1994-09-28 | 1996-04-09 | Nikko Kinzoku Kk | Nonmagnetic stainless steel for high burring forming and its production |
| JPH08109447A (en) * | 1994-10-12 | 1996-04-30 | Nikko Kinzoku Kk | Austenitic stainless steel excellent in roll transferability |
-
1996
- 1996-07-17 JP JP08205453A patent/JP3095689B2/en not_active Expired - Fee Related
-
1997
- 1997-04-16 TW TW086104903A patent/TW454045B/en not_active IP Right Cessation
- 1997-05-31 KR KR1019970022507A patent/KR100237536B1/en active IP Right Review Request
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05117813A (en) * | 1991-04-18 | 1993-05-14 | Nisshin Steel Co Ltd | Stainless steel for metal gasket having excellent formability and fatigue characteristic and this manufacture |
| JPH05202448A (en) * | 1991-12-27 | 1993-08-10 | Nisshin Steel Co Ltd | Improved material for electron tube |
| JPH0892691A (en) * | 1994-09-28 | 1996-04-09 | Nikko Kinzoku Kk | Nonmagnetic stainless steel for high burring forming and its production |
| JPH08109447A (en) * | 1994-10-12 | 1996-04-30 | Nikko Kinzoku Kk | Austenitic stainless steel excellent in roll transferability |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6391254B1 (en) | 1999-07-05 | 2002-05-21 | Nippon Mining & Metals Co., Ltd. | Fe-Cr-Ni alloy for electron gun electrodes |
| US6379477B1 (en) | 1999-09-28 | 2002-04-30 | Nippon Mining & Metals Co., Ltd. | Fe-Cr-Ni alloy for electron gun electrodes and Fe-Cr-Ni alloy sheet for electron gun electrodes |
| US6806635B1 (en) | 1999-09-29 | 2004-10-19 | Nippon Mining And Metals Co., Ltd. | Fe-Ni-Cr- based alloy strip having improved press-formability and used for electrode of electron gun |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3095689B2 (en) | 2000-10-10 |
| KR980009495A (en) | 1998-04-30 |
| KR100237536B1 (en) | 2000-01-15 |
| TW454045B (en) | 2001-09-11 |
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