JPH04218695A - Production of color developing specular stainless steel material with nonuniform color development reduced - Google Patents
Production of color developing specular stainless steel material with nonuniform color development reducedInfo
- Publication number
- JPH04218695A JPH04218695A JP40322390A JP40322390A JPH04218695A JP H04218695 A JPH04218695 A JP H04218695A JP 40322390 A JP40322390 A JP 40322390A JP 40322390 A JP40322390 A JP 40322390A JP H04218695 A JPH04218695 A JP H04218695A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- steel material
- color
- coloring
- color development
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 25
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 22
- 239000010935 stainless steel Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000011161 development Methods 0.000 title abstract description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 18
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 9
- 238000004040 coloring Methods 0.000 claims description 19
- 238000005498 polishing Methods 0.000 claims description 16
- 239000011259 mixed solution Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 229910000423 chromium oxide Inorganic materials 0.000 abstract 2
- 238000000034 method Methods 0.000 description 21
- 238000005868 electrolysis reaction Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- NPURPEXKKDAKIH-UHFFFAOYSA-N iodoimino(oxo)methane Chemical compound IN=C=O NPURPEXKKDAKIH-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- PYRZPBDTPRQYKG-UHFFFAOYSA-N cyclopentene-1-carboxylic acid Chemical compound OC(=O)C1=CCCC1 PYRZPBDTPRQYKG-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は発色させたときに色むら
の少ない発色用鏡面ステンレス鋼材の製造方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a mirror-finished stainless steel material for coloring, which exhibits less uneven coloring when colored.
【０００２】0002
【従来の技術】ステンレス鋼板の化学的着色法として従
来より硫酸＋クロム酸の混合液を用いたいわゆるＩＮＣ
Ｏ法が多く用いられている。[Prior Art] As a chemical coloring method for stainless steel sheets, so-called INC has conventionally used a mixed solution of sulfuric acid and chromic acid.
O method is often used.
【０００３】化学着色ステンレス鋼板の主要な用途は、
建材用であることから、ステンレス鋼の基本的性質とし
ての耐食性の他に色調の統一性、即ち、色むらのないこ
とが求められる。The main uses of chemically colored stainless steel sheets are:
Since it is used as a building material, in addition to corrosion resistance, which is a basic property of stainless steel, it is also required to have uniform color tone, that is, no color unevenness.
【０００４】この点において、ステンレス鋼の表面に生
成した着色酸化皮膜を硫酸とクロム酸からなる電解液中
で陰極電解し、皮膜中にクロムを析出させて耐食性と対
摩耗性を向上させる方法がＩＮＣＯ社より開示されてい
る（特公昭５３−３１８１７）。In this regard, there is a method of cathodic electrolyzing the colored oxide film formed on the surface of stainless steel in an electrolytic solution consisting of sulfuric acid and chromic acid to precipitate chromium in the film to improve corrosion resistance and wear resistance. It is disclosed by INCO (Special Publication No. 53-31817).
【０００５】このＩＮＣＯ法は「着色」工程と「硬膜」
工程の２工程から成るもので、各々独立の溶液組成・温
度・処理条件で当該工程を行うものであり、主としてバ
ッチ方法で単板の着色ステンレス鋼板の製造に用いられ
ている。[0005] This INCO method involves a "coloring" process and a "dural" process.
This process consists of two steps, each of which is performed using independent solution composition, temperature, and treatment conditions, and is mainly used in the batch process to produce veneer colored stainless steel sheets.
【０００６】化学着色ステンレス鋼板を安価に提供する
には、工程の省略化と色むらのない品質で歩留の良いこ
とが必要となる。[0006] In order to provide chemically colored stainless steel sheets at low cost, it is necessary to simplify the process, have uniform color quality, and have a high yield.
【０００７】[0007]
【発明が解決しようとする課題】従来法における「着色
」後に「硬膜」を行う２工程では、「着色」処理時の色
調が「硬膜」処理で変化すること及び「着色」処理にお
いて主に利用されている浸漬法では、被着色物の端面に
おいて色むらが不可避的に生ずるという問題がある。[Problems to be Solved by the Invention] In the two steps of performing "hardening" after "coloring" in the conventional method, the color tone during the "coloring" process changes during the "hardening" process, and the main problem in the "coloring" process is that The immersion method used in the present invention has a problem in that color unevenness inevitably occurs on the end surface of the object to be colored.
【０００８】さらに、鏡面材が最近高級化の世相を反映
して増えている。この場合、表面に映る像の鮮明度が高
い物が好まれる傾向にある。したがって、鏡面材として
いわゆる００研摩仕上材が使われるが、これまでの技術
で作ったこの材料を発色処理すると、研摩むらに起因す
る色むらが生じることが多く、問題であった。[0008]Furthermore, the number of mirror-finish materials has increased recently, reflecting the trend toward higher-end products. In this case, there is a tendency to prefer objects with high clarity of image reflected on the surface. Therefore, a so-called 00 polishing finishing material is used as a mirror material, but when this material made using conventional techniques is subjected to coloring treatment, uneven coloring often occurs due to uneven polishing, which is a problem.
【０００９】したがって、本発明の目的は発色させたと
きに色むらの発生が少ない発色用の鏡面ステンレス鋼材
の製造方法を提供しようとするにある。[0009] Accordingly, an object of the present invention is to provide a method for producing a mirror-finished stainless steel material for color development, which causes less color unevenness when color is developed.
【００１０】0010
【課題を解決するための手段】色むらの原因は、材質の
不均一（成分、硬度などの違い）やゴミ・油分の付着や
汚れに起因するものである。汚れはカソード処理により
水素ガス気泡で除去することにより、表面の不均一に対
しては均一な不働態皮膜を最表面につけることにより解
決できる（特開昭６２−６０８９４）。[Means for Solving the Problems] The causes of uneven color are due to non-uniformity of materials (differences in composition, hardness, etc.), adhesion of dust and oil, and dirt. Dirt can be removed by cathodic treatment using hydrogen gas bubbles, and surface unevenness can be solved by applying a uniform passive film to the outermost surface (Japanese Patent Laid-Open No. 62-60894).
【００１１】しかし、近年数量的に伸びている鏡面研摩
仕上げ材（以下、鏡面材と称す）の色むらは、上記原因
の他に、研摩の跡が発色すると色むらに看破される現象
が主なものである。[0011] However, in addition to the above-mentioned causes, the color unevenness of mirror-polished finishing materials (hereinafter referred to as mirror-finished materials), which has been increasing in quantity in recent years, is mainly caused by a phenomenon in which color unevenness is detected when the polishing marks develop color. It is something.
【００１２】発明者らは、この研摩による色むらの原因
を詳細に調べた結果、研摩の程度により表面に存在する
加工歪の量及びその厚みに起因すること、及び、加工歪
層の有無を表面残留応力測定で評価できることを見い出
した。さらに、この加工歪層を電解研摩により均一に表
面を研削することにより、発色むらの解消ができる方法
を確立した。[0012] As a result of detailed investigation into the causes of color unevenness caused by this polishing, the inventors found that it is caused by the amount and thickness of machining strain existing on the surface depending on the degree of polishing, and whether there is a machining strain layer. We have discovered that this can be evaluated by measuring surface residual stress. Furthermore, we established a method that can eliminate uneven color development by uniformly grinding the surface of this strained layer by electrolytic polishing.
【００１３】本発明においては、化学発色した際に発生
する色むらの解消方法として、鏡面研摩したステンレス
鋼材に発色前に電解研摩により該鋼材の表面に存在する
加工変質層を除去することにより、色むらの発生を防止
する。[0013] In the present invention, as a method for eliminating color unevenness that occurs when chemically colored, a process-affected layer existing on the surface of a mirror-polished stainless steel material is removed by electrolytic polishing before coloring. Prevents uneven coloring.
【００１４】上記の加工変質層の厚み評価方法として、
Ｘ線折法による表面残留応力の値と発色後の表面色調の
間に相関関係のあることを見い出した。この知見を元に
、本発明に至ったものである。[0014] As a method for evaluating the thickness of the process-affected layer,
It has been found that there is a correlation between the value of surface residual stress measured by X-ray diffraction and the surface color tone after color development. Based on this knowledge, we have arrived at the present invention.
【００１５】即ち、本発明は、鏡面ステンレス鋼材に、
３００〜１，０００ｇ／ｌのりん酸および２０〜１８０
ｇ／ｌの無水クロム酸を含む７０℃以下の混合溶液中で
、５〜３５Ａ／ｄｍ２ の電流密度で電解研摩処理を施
して該鋼材表面の加工変質層を除去することを特徴とす
る発色むらの少ない発色用鏡面ステンレス鋼材の製造方
法を提供するものである。That is, the present invention provides mirror-finished stainless steel material with
300-1,000 g/l phosphoric acid and 20-180 g/l
A coloring unevenness characterized by removing a process-altered layer on the surface of the steel material by performing electrolytic polishing treatment at a current density of 5 to 35 A/dm2 in a mixed solution containing g/l of chromic acid anhydride at 70°C or lower. The present invention provides a method for producing a mirror-finished stainless steel material for coloring with less coloring.
【００１６】以下に本発明をさらに詳細に説明する。The present invention will be explained in more detail below.
【００１７】これまでは、発色むら防止には、電解研摩
でどれ位減肉させればよいかが明瞭に判別されていなか
ったので、所期の目的を全うすることができなかった。Up to now, it has not been clearly determined how much thickness should be reduced by electrolytic polishing in order to prevent uneven color development, so the intended purpose could not be achieved.
【００１８】本発明においては、下記条件により、加工
変質層を電解研摩により除去すれば、発色むらは防止で
きることを確認した。したがって、それぞれについて以
下に述べる。In the present invention, it has been confirmed that uneven color development can be prevented by removing the process-affected layer by electrolytic polishing under the following conditions. Therefore, each will be described below.
【００１９】（１）電解研摩溶液
りん酸と無水クロム酸を含む混合液の組成において、り
ん酸：３００ｇ／ｌ未満および無水クロム酸：２０ｇ／
ｌ未満では、電解研摩が行えず、またりん酸：１，００
０ｇ／ｌおよび無水クロム酸：１８０ｇ／ｌを越えると
、溶解が自発的に起き不適であるので、りん酸：３００
〜１，０００ｇ／ｌおよび無水クロム酸：２０〜１８０
ｇ／ｌに限定する、さらに、浴温は、７０℃を越えると
液の蒸発による濃化が著しく、このため電解研摩した面
が荒れるので７０℃以下とするのがよい。(1) Electrolytic polishing solution In the composition of the mixed solution containing phosphoric acid and chromic anhydride, phosphoric acid: less than 300 g/l and chromic anhydride: 20 g/l
If the amount is less than 1,000 liters, electrolytic polishing cannot be performed, and phosphoric acid: 1,00
If it exceeds 0g/l and chromic anhydride: 180g/l, dissolution will occur spontaneously, which is inappropriate, so phosphoric acid: 300g/l
~1,000g/l and chromic anhydride: 20-180
g/l.Furthermore, if the bath temperature exceeds 70°C, the concentration of the liquid will be significant due to evaporation, which will cause the electrolytically polished surface to become rough, so it is better to keep the bath temperature below 70°C.
【００２０】（２）電解電流密度
５Ａ／ｄｍ２ 未満では、効果的な電解研摩できず、ま
た、３５Ａ／ｄｍ２ を越えると、表面が梨地状に荒れ
て平滑にならないので、５〜３５Ａ／ｄｍ２ に限定す
る。
なお、電解時間は、２〜１５分とするのが好ましい。ま
た、この前処理を施した後実施する発色処理は交番電流
電解法（特公昭６１−１２７８９８）が好適であるが、
その他に浸漬法でも可能である。鏡面ステンレス鋼材と
しては、一般的な薄板の他に、エッチングしたものやパ
イプ、棒のような品質にも適用できる。なお、鏡面加工
前のステンレス鋼素材の工程はとくに定める必要がなく
、ＢＡ、２Ｂ仕上げなど各種仕上げ状態のものが適用さ
れる。(2) If the electrolytic current density is less than 5 A/dm2, effective electrolytic polishing cannot be performed, and if it exceeds 35 A/dm2, the surface will become rough and not smooth. limit. Note that the electrolysis time is preferably 2 to 15 minutes. In addition, alternating current electrolysis method (Japanese Patent Publication No. 61-127898) is suitable for the coloring treatment carried out after this pretreatment.
In addition, a dipping method is also possible. In addition to general thin plates, mirror-finished stainless steel materials can also be applied to etched materials, pipes, and rods. Note that there is no need to specify a particular process for the stainless steel material before mirror finishing, and various finishing states such as BA and 2B finishing are applicable.
【００２１】[0021]
【実施例】以下に本発明を実施例に基づいて具体的に説
明する。EXAMPLES The present invention will be specifically explained below based on examples.
【００２２】（実施例１）ＳＵＳ ３０４の８００番
鏡面研摩材を用いて、前処理を、本発明に係る方法と従
来のこの前処理を施さない方法の２通りで行った。その
後、交番電流電解法によりゴールドに発色処理を施した
。色ムラは同一板面中央の１点を基準にとり、その１点
を含む周囲の正方形（７．５×７．５ｃｍ）の頂点４点
の計５点で色差を測定した。以下、各条件を詳述する。(Example 1) Using SUS 304 No. 800 mirror polishing material, pretreatment was carried out in two ways: a method according to the present invention and a conventional method in which no pretreatment was performed. Thereafter, the gold was colored by alternating current electrolysis. The color difference was measured at a total of five points: one point at the center of the same board surface was taken as a reference, and the four points were the vertices of a surrounding square (7.5 x 7.5 cm) including that one point. Each condition will be explained in detail below.
【００２３】このとき残留応力を、サンプル表面中央部
で、Ｘ線回折法により測定した。また変質層の厚みは断
面組織の顕微鏡組織観察により求めた。At this time, the residual stress was measured at the center of the sample surface by an X-ray diffraction method. The thickness of the altered layer was determined by microscopic microstructure observation of the cross-sectional structure.
【００２４】（本発明法による前処理）りん酸：７００
ｇ／ｌおよび無水クロム酸：５０ｇ／ｌを含む水溶液中
で表１に示す各々の温度および電流密度で各５分間の電
解研摩を行った。(Pretreatment according to the method of the present invention) Phosphoric acid: 700
Electrolytic polishing was performed for 5 minutes at each temperature and current density shown in Table 1 in an aqueous solution containing 50 g/l and chromic acid anhydride.
【００２５】（従来の浸漬前処理）４０℃の１５％硝酸
溶液中に１分間浸漬した。(Conventional immersion pretreatment) The sample was immersed in a 15% nitric acid solution at 40° C. for 1 minute.
【００２６】（交番電流電解条件）陽極および陰極電解
の電流密度を０．１２５Ａ／ｄｍ２ 、陽極単位電解時
間を１３秒、陰極のそれを７秒、電解くり返し数を３１
として、１２０×２５０×１．５ｍｍの平板で実施した
。(Alternating current electrolysis conditions) The current density of anode and cathode electrolysis was 0.125 A/dm2, the anode unit electrolysis time was 13 seconds, the cathode electrolysis was 7 seconds, and the number of electrolysis repetitions was 31.
The test was carried out on a flat plate of 120 x 250 x 1.5 mm.
【００２７】色差の測定は、色差計（ミノルタ、ＣＲ−
１００）にＣＩＥ（国際照明委員会）１９７６年推奨の
（Ｌ＊ａ＊ｂ＊）表示系に基づき、色差：ΔＥ＊ａｂを
算定した。The color difference was measured using a color difference meter (Minolta, CR-
100), the color difference: ΔE*ab was calculated based on the (L*a*b*) display system recommended by the CIE (International Commission on Illumination) in 1976.
【００２８】色むらの有無は目視によると個人差が入る
ため、ＮＢＳ単位（０．９２×ΔＥ＊ｓｂ）でわずかに
異なる（ｓｌｉｇｈｔ）レベルである０．５〜１．５を
基準として１．０を越えるもの（即ちΔＥ＊ａｂ≧１．
０９）をこの場合は、色むらありとした。なお、この判
定基準では目視ではほとんど差別はつき難いものだった
。Since the presence or absence of color unevenness differs from person to person when visually observed, 1. Those exceeding 0 (i.e. ΔE*ab≧1.
09) was treated as having color unevenness in this case. It should be noted that with this criterion, it was almost impossible to detect discrimination by visual inspection.
【００２９】このようにして得られた結果を表１にまと
めたＮｏ．１〜５は本発明例、Ｎｏ．６〜１０は、本発
明の条件を逸脱する比較例、Ｎｏ．１１〜１３は従来の
浸漬法による従来例で、１２０×２５０ｍｍの板におい
て、上記のようにして色差で評価した。The results obtained in this manner are summarized in Table 1. 1 to 5 are examples of the present invention, No. Nos. 6 to 10 are comparative examples that deviate from the conditions of the present invention; Nos. 11 to 13 are conventional examples using the conventional dipping method, and evaluations were made on the color difference as described above on a 120×250 mm plate.
【００３０】これらのデータにより、本発明法による前
処理を行えば（本発明例）、実質上色むらのない鏡面発
色ステンレス鋼板を得ることができることがわかる。比
較例では電解研摩によっても変質層が除去されていない
ため、そして従来例では変質層を除去する処理をしてな
いため発色処理後に発色むらが生じている。These data show that by performing the pretreatment according to the method of the present invention (example of the present invention), it is possible to obtain a mirror-colored stainless steel sheet with substantially no color unevenness. In the comparative example, the altered layer was not removed even by electropolishing, and in the conventional example, no treatment was performed to remove the altered layer, so uneven color development occurred after the coloring treatment.
【００３１】[0031]
【表１】[Table 1]
【００３２】[0032]
【発明の効果】本発明に係る前処理法を施した鏡面ステ
ンレス鋼材を用いて交番電流電解法を含む発色処理を行
なえば目視では色むらのない鏡面発色ステンレス鋼板が
得られる。本発明法は薄板以外にも、鋼管や棒材および
加工・成形品にも広く応用できる。[Effects of the Invention] If a coloring treatment including an alternating current electrolysis method is performed using a mirror-finished stainless steel material subjected to the pretreatment method according to the present invention, a mirror-colored stainless steel sheet with no visible color unevenness can be obtained. The method of the present invention can be widely applied not only to thin plates but also to steel pipes, bars, and processed and molded products.
Claims (1)
０ｇ／ｌのりん酸および２０〜１８０ｇ／ｌの無水クロ
ム酸を含む７０℃以下の混合溶液中で、５〜３５Ａ／ｄ
ｍ２ の電流密度で電解研摩処理を施して該鋼材表面の
加工変質層を除去することを特徴とする発色むらの少な
い発色用鏡面ステンレス鋼材の製造方法。Claim 1: 300 to 1,000 to mirror stainless steel material
5 to 35 A/d in a mixed solution below 70°C containing 0 g/l phosphoric acid and 20 to 180 g/l chromic anhydride.
A method for producing a mirror-finished stainless steel material for coloring with less uneven coloring, characterized by performing electrolytic polishing treatment at a current density of m2 to remove a process-affected layer on the surface of the steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40322390A JPH04218695A (en) | 1990-12-18 | 1990-12-18 | Production of color developing specular stainless steel material with nonuniform color development reduced |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40322390A JPH04218695A (en) | 1990-12-18 | 1990-12-18 | Production of color developing specular stainless steel material with nonuniform color development reduced |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04218695A true JPH04218695A (en) | 1992-08-10 |
Family
ID=18512977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40322390A Withdrawn JPH04218695A (en) | 1990-12-18 | 1990-12-18 | Production of color developing specular stainless steel material with nonuniform color development reduced |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04218695A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005247629A (en) * | 2004-03-04 | 2005-09-15 | Komatsu Electronic Metals Co Ltd | Cooler and ingot manufacturing apparatus |
| JP2010255039A (en) * | 2009-04-23 | 2010-11-11 | Tohoku Okajima Kogyo Kk | Method for manufacturing grating made from colored stainless steel, and grating made from colored stainless steel obtained by the manufacturing method |
| EP3511439A4 (en) * | 2016-09-08 | 2020-02-26 | Asahimekki Corporation | Low-gloss chemically colored stainless steel, chemically colored stainless steel processed product, and method for manufacturing same |
-
1990
- 1990-12-18 JP JP40322390A patent/JPH04218695A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005247629A (en) * | 2004-03-04 | 2005-09-15 | Komatsu Electronic Metals Co Ltd | Cooler and ingot manufacturing apparatus |
| JP4606753B2 (en) * | 2004-03-04 | 2011-01-05 | Ｓｕｍｃｏ Ｔｅｃｈｘｉｖ株式会社 | Cooler and ingot manufacturing equipment |
| JP2010255039A (en) * | 2009-04-23 | 2010-11-11 | Tohoku Okajima Kogyo Kk | Method for manufacturing grating made from colored stainless steel, and grating made from colored stainless steel obtained by the manufacturing method |
| EP3511439A4 (en) * | 2016-09-08 | 2020-02-26 | Asahimekki Corporation | Low-gloss chemically colored stainless steel, chemically colored stainless steel processed product, and method for manufacturing same |
| US11008667B2 (en) | 2016-09-08 | 2021-05-18 | Asahimekki Corporation | Low-gloss chemically colored stainless steel, chemically colored stainless steel processed product, and method for manufacturing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980312 |