JPS62149385A - Production of thin ferritic stainless steel having excellent blanking property - Google Patents
Production of thin ferritic stainless steel having excellent blanking propertyInfo
- Publication number
- JPS62149385A JPS62149385A JP29088185A JP29088185A JPS62149385A JP S62149385 A JPS62149385 A JP S62149385A JP 29088185 A JP29088185 A JP 29088185A JP 29088185 A JP29088185 A JP 29088185A JP S62149385 A JPS62149385 A JP S62149385A
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- Prior art keywords
- stainless steel
- ferritic stainless
- org
- thin
- steel sheet
- 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.)
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、打抜加工性のすぐれたフェライト系ステンレ
ス薄板を安価に製造する方法を提供するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a method for inexpensively manufacturing a ferritic stainless steel thin plate with excellent punching workability.
［従来の技術］
近年安価なステンレス薄板に対する要求が高まり、フェ
ライト系ステンレス薄板を大量生産に適した普通鋼薄板
の製造設備で作られるようになってきた。従来のフェラ
イト系ステンレス薄板の最終焼鈍は１表面にスケールが
出来ないよう露点が一６０℃前後でＮ２がほぼ１００％
の雰囲気中で連続焼鈍するか、酸化性の雰囲気で連続焼
鈍設備洗してスケールを除去する等の方法で作られてい
た。しかしながら前出のごとく普通鋼薄板の連続焼鈍設
備でフェライト系ステンレス薄板を焼鈍する場合、普通
鋼薄板では表面に酸化物が出来ないが、フェライト系ス
テンレス薄板の場合には、表面に酸化物が形成される。[Prior Art] In recent years, the demand for inexpensive stainless steel sheets has increased, and ferritic stainless steel sheets have come to be manufactured using ordinary steel sheet manufacturing equipment suitable for mass production. Conventional final annealing of ferritic stainless steel sheets requires a dew point of around 160°C and almost 100% N2 to prevent scale from forming on the surface.
They were manufactured by continuous annealing in an oxidizing atmosphere, or by washing the continuous annealing equipment in an oxidizing atmosphere to remove scale. However, when a ferritic stainless steel sheet is annealed using the continuous annealing equipment for ordinary steel sheets as mentioned above, oxides are not formed on the surface of the ordinary steel sheet, but oxides are formed on the surface of the ferritic stainless steel sheet. be done.
これらの酸化物が表面に形成されている場合、耐蝕性が
若干劣化し、打抜加工性が著しく劣化するので良好な打
抜加工性が必要とされる用途に対して打抜加工性を改善
するため、酸洗によりスケールを除去して製品としてい
るのが現状である。If these oxides are formed on the surface, corrosion resistance will slightly deteriorate and punching workability will deteriorate significantly, so punching workability will be improved for applications that require good punching workability. Therefore, the current situation is to use pickling to remove scale before manufacturing products.
［発明が解決しようとする問題点］
製品コストの安い普通鋼薄板製造設備を利用してフェラ
イト系ステンレス薄板を製造する場合、最終焼鈍時に鋼
板表面に（Ｃｒ、Ｆｅ）、Ｏ，を主体とする酸化層が形
成され、この酸化層が工具を磨耗させて刃先が丸くなり
、打抜加工性が著しく劣化する。打抜加工性を改善する
ために、これらの酸化層を除去する酸洗工程が必要であ
り、この酸洗作業コストが高かった。本発明は、酸洗し
ないでも打抜加工性を改善する方策を提供するものであ
る。本発明の方法に従えば、従来のステンレス薄板の打
抜加工性も著しく向上させるものである。[Problems to be Solved by the Invention] When manufacturing ferritic stainless steel thin sheets using ordinary steel sheet manufacturing equipment with low product costs, (Cr, Fe), O, and the like are mainly present on the steel sheet surface during final annealing. An oxidized layer is formed, and this oxidized layer causes the tool to wear out, resulting in a rounded cutting edge and a significant deterioration in punching workability. In order to improve punching workability, a pickling process is required to remove these oxidized layers, and the cost of this pickling process is high. The present invention provides a method for improving punching workability without pickling. According to the method of the present invention, the punching workability of conventional thin stainless steel plates is also significantly improved.
［問題点を解決するための手段］
本発明は（１）焼鈍したフェライト系ステンレス薄板表
面に有機質又は有機質と無機質の混合した塗膜を形成す
ることを特徴とした打抜加工性のすぐれたフェライト系
ステンレス薄板の製造方法であり、（２）又上記（１）
の焼鈍が露点−３０〜０℃、Ｈ２１〜８０％、残りＮ２
からなる雰囲気で８００〜１０００℃の温度域の焼鈍で
ある打抜加工性のすぐれたフェライト系ステンレス薄板
の製造方法であり、（３）又上記（１）の焼鈍が露点−
３０℃未満、Ｈ２８０％超、残りＮ２からなる雰囲気の
焼鈍である打抜加工性のすぐれたフェライト系ステンレ
ス薄板の製造方法であり、（４）又表面の酸化層の厚み
が３００〜５０００人である上記（２）の打抜加工性の
すぐれたフェライト系ステンレス薄板の製造方法であり
、（５）又塗膜の付着量が０．０５〜５ｇ／ｎ−Ｆであ
る上記（１）の打抜加工性のすぐれたフェライト系ステ
ンレス薄板の製造方法である。[Means for Solving the Problems] The present invention provides (1) a ferrite with excellent punching workability, which is characterized by forming a coating film of an organic substance or a mixture of an organic substance and an inorganic substance on the surface of an annealed ferritic stainless thin plate; It is a method for manufacturing a stainless steel thin plate based on (2) and (1) above.
Annealing is performed at a dew point of -30 to 0℃, H21 to 80%, and the remainder N2.
(3) In addition, the annealing in (1) above is annealed at a temperature range of 800 to 1000°C in an atmosphere consisting of
This is a method for producing a ferritic stainless steel thin plate with excellent punching workability by annealing in an atmosphere of less than 30°C, H2 of over 80%, and N2 remaining. A method for manufacturing a thin ferritic stainless steel plate with excellent punching workability as described in (2) above, and (5) also as described in (1) above, wherein the amount of coating film is 0.05 to 5 g/n-F. This is a method for manufacturing a ferritic stainless steel thin plate with excellent punchability.
［作用コ
普通鋼薄板の連続焼鈍は、通常露点は一３０℃〜−１０
℃、Ｈ２１〜２％残りＮ２からなる雰囲気で行われてお
り、このような雰囲気の場合も、普通ＩＩｉ薄板の場合
は表面に酸化物が出来ないが、フェライト系ステンレス
薄板の場合は、約５００人〜５０００人の酸化層が形成
され表面がきつね色から灰色まで酸化層の厚みによって
変化する。この鋼板をスチールダイで打抜加工を行う場
合、表面酸化層の厚みが１００人前後と少ないいわゆる
ＢＡ表面仕上げのフェライト系ステンレス薄板と比較し
て著しく打抜加工性が劣化するという欠点がある。ここ
でいう打抜加工性の劣化というのは、工具磨耗が大きい
ということで、少ない打抜加工回数で工具を再研磨する
必要が生じるので、工具のの命及び生産性の低下のいず
れの面でも好ましいものではない。このような材料の打
抜加工性向上のため、打抜条件（打抜油、ポンチとダイ
のクリアランス、工具の材質）について種々検討を行っ
たが、タングステンカーバイド（ＷＣ）を主体とした超
硬ダイを使用すれば、打抜性はＢＡ表面仕上材と遜色が
なく著しく良好なことが判ったが、スチールダイの場合
は、打抜油やポンチとダイのクリアランスの調整のごと
き打抜条件の変更のみでは、改善代は僅かであった。そ
こでこのような鋼板表面に有機質又は有機質と無機質と
の混合物からなる被膜をコーティングした後打抜加工を
行ったところ、打抜性が飛躍的に向上することを見い出
し本発明を完成させたものである。[Operation: Continuous annealing of ordinary steel thin plates usually has a dew point of -30°C to -10°C.
The process is carried out in an atmosphere consisting of H21~2% and N2 remaining.Even in such an atmosphere, oxides are not formed on the surface of IIi thin plates, but in the case of ferritic stainless steel thin plates, about 500 An oxidized layer of ~5,000 people is formed, and the surface changes from golden brown to gray depending on the thickness of the oxidized layer. When punching this steel plate with a steel die, there is a drawback that the punching workability is significantly deteriorated compared to a ferritic stainless thin plate with a so-called BA surface finish, which has a small surface oxidation layer of about 100 mm. Deterioration of punching workability here means that tool wear is large, and it becomes necessary to re-sharpen the tool after a small number of punching operations, resulting in a decrease in tool life and productivity. But it's not a good thing. In order to improve the punching workability of such materials, various studies were conducted regarding punching conditions (punching oil, clearance between the punch and die, and tool material), but a carbide die mainly made of tungsten carbide (WC) was used. It was found that when using a steel die, the punching performance was comparable to that of a BA surface finish material and was significantly better. However, in the case of a steel die, only changes in punching conditions such as adjusting the punch oil and the clearance between the punch and the die were required. So, the cost of improvement was small. Therefore, when punching was performed after coating the surface of such a steel plate with a film made of an organic substance or a mixture of organic and inorganic substances, it was discovered that the punching property was dramatically improved, and the present invention was completed. be.
本発明は表面酸化層が１００人前後の従来の方法で製造
されたステンレス薄板に適用しても、打抜性が著しく向
上するのはいうまでもない。有機質又は有機質と無機質
との混合物からなる被膜を塗布することにより打抜性が
著しく向上するのは、次の理由に基づく。（１）表面層
に形成された（Ｃｒ、Ｆｅ）ｚｏ、系の酸化物は著しく
硬く、打抜に際してポンチ、ダイを摩耗させる働きをす
るが、この上に有機質等の被膜を塗布することで、これ
ら酸化物が直接工具と接触して工具を摩耗させるのを防
止する。It goes without saying that even when the present invention is applied to a thin stainless steel plate manufactured by a conventional method with a surface oxidation layer of about 100, the punchability is significantly improved. The punchability is significantly improved by applying a film made of an organic material or a mixture of an organic material and an inorganic material for the following reason. (1) The (Cr, Fe) oxides formed on the surface layer are extremely hard and work to wear out the punch and die during punching, but by applying an organic coating on top of this, , these oxides are prevented from coming into direct contact with the tool and causing tool wear.
（２）ポンチやダイの側面とフェライト系ステンレスの
剪断面が直接接触することによりポンチやダイの側面が
焼き付いたり摩耗したりするのをこの表面に形成した塗
膜が防止する。(2) The coating film formed on the surface of the punch or die prevents the side surface of the punch or die from seizing or abrasion due to direct contact between the side surface of the ferritic stainless steel and the sheared surface of the ferritic stainless steel.
本発明の目的としてステンレス鋼板の表面に塗布すべき
有機質又は有機質と無機質との混合物からなる物質とは
、具体的には、ポリビニールアルコール（ＰＶＡ）やア
クリルエマルジョン、又このアクリルエマルジョンにＣ
ｒｙ、やＨ，ＢＯ，等を添加したもの、水溶性メラミン
アルキド樹脂等いずれでも良いが、塗布作業の安全性及
び容易性から水溶性の有機質が好ましいのは云うまでも
ない。Specifically, the substance consisting of an organic substance or a mixture of an organic substance and an inorganic substance to be coated on the surface of a stainless steel plate for the purpose of the present invention is polyvinyl alcohol (PVA), an acrylic emulsion, or a carbon dioxide in this acrylic emulsion.
ry, H, BO, etc., water-soluble melamine alkyd resin, etc., but it goes without saying that water-soluble organic materials are preferable from the viewpoint of safety and ease of application.
次に本発明の限定理由について説明する。本発明に供す
るフェライト系ステンレス薄板の焼鈍雰囲気を限定した
のは生成する酸化層の厚みをコントロールすることが目
的であり、露点が０℃以上で、Ｎ２が１％以下では、生
成される酸化層の厚みが厚くなり、ステンレス鋼板の美
感が損われて好ましくないばかりでなく、本発明の方法
により表面に有機質被膜を塗布しても被膜の厚みを５
ｇ ／ ｍ超と厚くしないと良好な打抜加工性を示さな
いためである。従来方法すなわち光輝焼鈍（露点−３０
℃以下、Ｎ２８０％以上）したり、露点−３゜℃以上、
Ｎ２８０％以下の雰囲気または大気中で焼鈍後酸洗して
表面スケールを除去してステンレス薄板を製造する場合
にも、本願発明のごとき表面に被膜を形成することによ
り従来のステンレス薄板と比べて打抜性が飛躍的に向上
する。本発明におけるステンレス薄板の焼鈍温度を８０
０℃以上としたのは、これ以下の低い温度では本願発明
の雰囲気でも表面層の酸化物の形成量が少なく打抜性の
劣化を生じないためであり１０００℃以下と限定したの
は、これ以上の高温では、酸化層の厚みが厚くなり、本
発明の方法で打抜性を改善するためには、塗布すべき有
機質の量が多くなり、経済的でないので、加熱温度の上
限を１０００℃としたものである。塗布すべき塗膜の量
を０．０５ ｇ ／ ｒｄ以上としたのは、これ以下の
塗膜量では、打抜性の向上化が少ないので０ 、０５
ｇ ／ ｍ以上としたものであり、５ ｇ ／ ｍ以下
としたのは、これ以上塗膜量を増すほど打抜性向上効果
は増加するが、塗膜を形成するためのコストが高くなり
、経済的でないので、上限を５ ｇ ／ ｒｄとしたも
のである。又このような有機質被膜の厚みが厚くなるに
従って溶接性が劣化する傾向がみられるので、塗膜厚み
は、この点を考慮して決定する必要がある。Next, the reasons for the limitations of the present invention will be explained. The purpose of limiting the annealing atmosphere for the ferritic stainless steel sheet used in the present invention is to control the thickness of the oxidized layer that is formed. Not only does this increase the thickness of the stainless steel sheet, which is undesirable as it impairs the aesthetic appearance of the stainless steel sheet, but even if the organic coating is applied to the surface using the method of the present invention, the thickness of the coating will not be increased by 50%.
This is because good punching workability is not exhibited unless the thickness exceeds g/m. Conventional method: bright annealing (dew point -30
℃ or less, N280% or more), dew point -3゜℃ or more,
Even when manufacturing thin stainless steel sheets by annealing in an atmosphere containing 80% N2 or less or in the air to remove surface scale by pickling to remove surface scale, forming a coating on the surface as in the present invention makes it easier to hammer than conventional stainless steel sheets. Erasability is dramatically improved. The annealing temperature of the stainless steel thin plate in the present invention is 80
The reason for setting the temperature to be 0°C or higher is that at lower temperatures, even in the atmosphere of the present invention, the amount of oxide formed on the surface layer is small and no deterioration of punching properties occurs. At higher temperatures, the thickness of the oxide layer becomes thicker, and in order to improve punchability using the method of the present invention, the amount of organic material that must be applied increases, which is not economical. Therefore, the upper limit of the heating temperature is set at 1000°C. That is. The reason why the amount of the coating film to be applied is set to 0.05 g/rd or more is because if the coating amount is less than this, there will be little improvement in punching property.
g/m or more, and 5 g/m or less because as the amount of coating increases further, the effect of improving punching performance increases, but the cost for forming the coating increases, Since it is not economical, the upper limit is set at 5 g/rd. Furthermore, as the thickness of such an organic coating increases, weldability tends to deteriorate, so the coating thickness must be determined with this point in mind.
本発明に供されるフェライト系ステンレス薄板の表面酸
化層の厚みを３００Å以上としたのは、これ以下の厚み
の酸化層では、従来の方法で製造したステンレス薄板と
比較して打抜性は遜色がないからであり、５０００Å以
下としたものは、これ以上の厚みの酸化層は剥離しやす
く、外観が好ましくないことと、打抜性を向上させるた
めに必要な塗膜量が多くなり好ましくないので、上限を
５００ｏ人と限定したものである。The reason why the thickness of the surface oxidized layer of the ferritic stainless steel sheet used in the present invention is set to 300 Å or more is because an oxide layer with a thickness less than this has inferior punchability compared to a stainless steel sheet manufactured by a conventional method. If the thickness is less than 5000 Å, an oxide layer with a thickness greater than this is likely to peel off, resulting in an unfavorable appearance, and the amount of coating required to improve punchability is undesirable. Therefore, the upper limit is limited to 500 people.
本発明を達成するための塗膜の塗布方法は、公知のどの
ような方法でもよいが、最も経済的な方法としては、焼
鈍後の材料の顕熱を利用して塗布径外部から特別の熱を
与えることなく乾燥することである。このためには速乾
性の有機コーテングを選択しなければならないのはいう
までもない。Any known method may be used to apply the coating film to achieve the present invention, but the most economical method is to use the sensible heat of the material after annealing to apply special heat from outside the coating diameter. drying without giving any moisture. Needless to say, for this purpose, a quick-drying organic coating must be selected.
［実施例］
以下本発明を実施例に従って具体的に説明する１、０．
０５％Ｃ，０，１５％Ａｌ、１６．５％Ｃｒを主成分と
するフェライト系ステンレス薄板を公知の方法で冷延し
て製品厚みとした後、露点−２０℃、Ｎ２１．５％残り
Ｎ２からなる雰囲気の連続焼鈍炉で８７５Ｘ１０秒の加
熱を行った後、第１表に示したごとくポリビニールアル
コール単体又はそれらに無機質を混入したものを塗布し
、炉温５００’Ｃの乾燥炉で３０秒間焼付は乾燥させた
。[Examples] The present invention will be specifically described below according to Examples 1, 0.
A thin ferritic stainless steel sheet containing 0.5% C, 0.15% Al, and 16.5% Cr as main components was cold-rolled using a known method to obtain a product thickness, and the dew point was -20°C, N2 was 1.5%, and the remaining N2 was After heating for 875 x 10 seconds in a continuous annealing furnace with an atmosphere of Second bake dry.
塗膜の付着量は０．０５ｇ〜１ｇ／ｒｒｒまで変化させ
た。このように作った薄板をスチールダイにより打抜を
行い、打抜性の判定を行ったが、比較のためにこのよう
な塗布をしなかったステンレス薄板の場合は打抜回数の
増加とともにかえり高さが増加し、３０００回打抜いた
時点のかえり高さが５０μｍと高くなったが、本発明の
方法で表面に塗膜を作ったものは１０万回打抜いてもま
だかえり高さは４０μｍと低く、打抜性が著しく向上す
ることがわかった。又耐銹幌も比較材と比べて向上した
。The amount of coating film adhered was varied from 0.05 g to 1 g/rrr. The thin sheets made in this way were punched out using a steel die and the punchability was evaluated.For comparison, in the case of stainless steel sheets that were not coated in this way, the burr height increased as the number of punches increased. The burr height increased to 50 μm after 3,000 punches, but the burr height was still 40 μm even after 100,000 punches with the coating film formed on the surface using the method of the present invention. It was found that the punching performance was significantly improved. The rust resistance was also improved compared to comparative materials.
第 １ 表 コーテング組成
２．０．０５％Ｇ、０．１２％Ａｌ、１６．７％Ｃｒを
主成分としたフェライト系ステンレス薄板を公知の方法
で冷延して製品厚みとした後露点−１０℃、Ｈ２２％、
残りＮ２からなる雰囲気の連続焼鈍炉で９００℃×５秒
の加熱を行った後、第２表に示したごとくメラミンアル
キド樹脂を塗布し、３００℃の温度で焼付けた。付着量
は０．１ｇ／ｒｒ？であった。こうして作った材料の打
抜試験を行ったところ、塗布なしの場合約３０００回打
抜いてかえりの高さが５０μｍとなり、工具摩耗が著し
く工具再研磨の必要が生じたが、本発明の方法で表面に
塗膜を作ったものは１０万回打抜いても、まだかえり高
さは３５μｍと低く、打抜性が著しく向上し、耐誘性も
著しく向上した。Table 1 Coating composition: 2. After cold rolling a ferritic stainless steel sheet containing 0.05% G, 0.12% Al, and 16.7% Cr as main components to a product thickness of -10 dew point °C, H22%,
After heating at 900°C for 5 seconds in a continuous annealing furnace in an atmosphere consisting of residual N2, a melamine alkyd resin was applied as shown in Table 2 and baked at a temperature of 300°C. The amount of adhesion is 0.1g/rr? Met. When we conducted a punching test on the material made in this way, the height of the burr was 50 μm after about 3000 punches without coating, and the tool wear was significant and the tool needed to be re-sharpened, but with the method of the present invention, Even after being punched 100,000 times with a coating film formed on the surface, the burr height was still as low as 35 μm, and the punching performance and resistance to induction were significantly improved.
第 ２ 表
３、酸化層の厚みが約３０００人あるフェライト系ステ
ンレス薄板の表面にアクリルエマルジョンを塗布し、５
００℃の炉温で２０秒間焼付けた。Table 2 3. Acrylic emulsion was applied to the surface of a thin ferritic stainless steel plate with an oxidation layer thickness of approximately 3000 mm.
Baking was performed for 20 seconds at an oven temperature of 00°C.
塗料の付着量は０．３ｇ／ｍであった。更にアクリルエ
マルジョンにＨ，ＰＯ，及びＡｌ（Ｈ□ＰＯ４）１゜ｃ
ｒＯ３，Ｈ３ＢＯ，を混合したものについても塗布焼付
けを行った。これらの材料を打抜試験したところ５０万
回打抜いてもかえり高さは３５μｍと著しく低く良好で
あったが、表面にコーテングを施さなかったものは５０
００回打抜いてかえり高さが５０μｍ以上となり、打抜
性は著しく悪かった。The amount of paint applied was 0.3 g/m. Furthermore, H, PO, and Al (H□PO4) 1°c were added to the acrylic emulsion.
A mixture of rO3 and H3BO was also coated and baked. A punching test of these materials showed that even after 500,000 punches, the burr height was extremely low at 35 μm, which was good, but the material without coating on the surface had a good
After 00 punches, the burr height was 50 μm or more, and the punching performance was extremely poor.
４、公知の方法で冷延した。、０４％Ｃ２０，１２％Ａ
ｌ、１６．７％Ｃｒを主成分としたフェライト系ステン
レス薄板をＨ２１％露点−１０℃残りＮ２の雰囲気で９
００℃の温度で加熱焼鈍後、表面に防錆剤として使用さ
れている水溶性アクリル樹脂を塗布し乾燥させた。付着
量は０．１ｇ／ｒｒｒであった。ついで打抜性の評価を
行ったが、防錆剤を塗布しなかったものは、１万回打抜
いてかえり高さが５０μｍに達したのに対し、本発明の
方法で塗布したものは１０万回打抜いた時点でもかえり
高さは３５μｍと良好であり、且つ耐誘性もすぐれてい
た。4. Cold rolled by a known method. , 04%C20, 12%A
l, 16.7% Cr-based ferritic stainless thin plate was heated at H21% dew point -10°C in an atmosphere of remaining N2.
After heating and annealing at a temperature of 00°C, a water-soluble acrylic resin used as a rust preventive agent was applied to the surface and dried. The amount of adhesion was 0.1 g/rrr. Next, the punching performance was evaluated, and it was found that the burr height reached 50 μm after 10,000 punchings for the specimens to which no rust preventive was applied, while the burr height reached 50 μm for the specimens coated with the method of the present invention. Even after 10,000 punches, the burr height remained at a good 35 μm, and the resistance to induction was also excellent.
５、表面が鏡のようになったいわゆるＢＡ裏表面有した
ステンレス薄板と、焼鈍機酸洗により表面酸化物を除去
したいわゆる２Ｂ表面を有したステンレス薄板の表面に
０．２ｇ／ｒｒｒの透明のアクリルエマルジョンを塗布
焼付けたものを打抜いたところ、５０万回打抜いた時点
でもかえり高さは４０μｍと工具摩耗が少なく、再研磨
の必要がなかったが、比較のためこのような塗膜を塗布
しなかったものは５万回打抜いてかえり高さが５０μ璽
と高くなり、工具の再研磨が必要となった。即ち本発明
の方法で、鋼板表面にうすい有機質塗膜を形成したもの
は、公知の方法で製造したステンレス薄板の打抜性を著
しく向上させた。更にこのような塗膜があるものは、塗
膜のないものと比べて著しく対銹性が向上した。5. A thin stainless steel plate with a so-called BA back surface, which has a mirror-like surface, and a thin stainless steel plate with a so-called 2B surface, in which surface oxides have been removed by annealing and pickling. When we punched a piece coated with acrylic emulsion and baked, the burr height was 40 μm even after 500,000 punches, showing little tool wear and no need for re-polishing. The one that was not coated had a burr height of 50 μm after being punched 50,000 times, and the tool had to be re-sharpened. That is, when a thin organic coating film was formed on the surface of a steel plate using the method of the present invention, the punchability of stainless steel sheets produced using a known method was significantly improved. Furthermore, those with such a coating film had significantly improved rust resistance compared to those without a coating film.
［効果］
以上緩々説明したごとく、テンパーカラーのついたフェ
ライト系ステンレス薄板の表面にきわめて僅かの盆の有
機質被膜を塗布することにより打抜性が著しく向上する
ので、生産性向上及び、金型の寿命延長の観点から極め
て経済的効果のある技術であり、更にこのような塗膜を
形成させることにより、耐誘性も向上する等、その経済
効果は著しいものがある。[Effects] As explained above, by applying a very small amount of organic coating to the surface of a thin ferritic stainless steel sheet with a temper color, punching performance is significantly improved, which improves productivity and improves mold quality. This is a very economically effective technique from the viewpoint of extending the service life, and furthermore, by forming such a coating film, the resistance to induction is improved, and the economic effects are significant.
Claims (5)
質又は有機質と無機質の混合した塗膜を形成することを
特徴とした打抜加工性のすぐれたフェライト系ステンレ
ス薄板の製造方法(1) A method for manufacturing a ferritic stainless steel thin plate with excellent punching workability, characterized by forming a coating film of an organic substance or a mixture of organic and inorganic substances on the surface of an annealed ferritic stainless steel thin plate.
りＮ＿２からなる雰囲気で８００〜１０００℃の温度域
の焼鈍である特許請求の範囲第１項記載の打抜加工性の
すぐれたフェライト系ステンレス薄板の製造方法。(2) Excellent punching workability according to claim 1, wherein the annealing is performed in a temperature range of 800 to 1000°C in an atmosphere consisting of a dew point of -30 to 0°C, H_21 to 80%, and the balance N_2. A method for manufacturing ferritic stainless steel thin plates.
Ｎ＿２からなる雰囲気の焼鈍である特許請求の範囲第１
項記載の打抜加工性のすぐれたフェライト系ステンレス
薄板の製造方法。(3) Claim 1, wherein the annealing is performed in an atmosphere with a dew point of less than -30°C, H_280%, and the remainder N_2.
A method for producing a thin ferritic stainless steel plate with excellent punching workability as described in 2.
特許請求の範囲第２項記載の打抜加工性のすぐれたフェ
ライト系ステンレス薄板の製造方法。(4) The method for producing a thin ferritic stainless steel plate with excellent punching workability according to claim 2, wherein the thickness of the oxide layer on the surface is 300 to 5000 Å.
２である特許請求の範囲第１項記載の打抜加工性のすぐ
れたフェライト系ステンレス薄板の製造方法。(5) The amount of coating film adhered is 0.05g/m^2~5g/m^
2. A method for producing a thin ferritic stainless steel plate with excellent punching workability according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60290881A JPH067951B2 (en) | 1985-12-25 | 1985-12-25 | Method for producing ferritic stainless steel sheet with excellent punching processability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60290881A JPH067951B2 (en) | 1985-12-25 | 1985-12-25 | Method for producing ferritic stainless steel sheet with excellent punching processability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62149385A true JPS62149385A (en) | 1987-07-03 |
| JPH067951B2 JPH067951B2 (en) | 1994-02-02 |
Family
ID=17761715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60290881A Expired - Lifetime JPH067951B2 (en) | 1985-12-25 | 1985-12-25 | Method for producing ferritic stainless steel sheet with excellent punching processability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067951B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225242A2 (en) * | 2001-01-18 | 2002-07-24 | Kawasaki Steel Corporation | Ferritic stainless steel sheet with excellent workability and method for making the same |
| EP1227168A1 (en) * | 2000-12-22 | 2002-07-31 | Kawasaki Steel Corporation | Ferritic stainless steel sheet for fuel tank and fuel pipe and method for making the same |
| EP1452616A1 (en) * | 2001-12-06 | 2004-09-01 | Nippon Steel Corporation | Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof |
| JP2007039759A (en) * | 2005-08-04 | 2007-02-15 | Nippon Steel Corp | Method for producing hot dip plated steel sheet, pretreatment cleaning device, and hot dip plating line equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139871A (en) * | 1979-04-18 | 1980-11-01 | Nisshin Steel Co Ltd | Pretreating method for covering organic material on stainless steel |
-
1985
- 1985-12-25 JP JP60290881A patent/JPH067951B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139871A (en) * | 1979-04-18 | 1980-11-01 | Nisshin Steel Co Ltd | Pretreating method for covering organic material on stainless steel |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1227168A1 (en) * | 2000-12-22 | 2002-07-31 | Kawasaki Steel Corporation | Ferritic stainless steel sheet for fuel tank and fuel pipe and method for making the same |
| EP1225242A2 (en) * | 2001-01-18 | 2002-07-24 | Kawasaki Steel Corporation | Ferritic stainless steel sheet with excellent workability and method for making the same |
| EP1225242A3 (en) * | 2001-01-18 | 2002-07-31 | Kawasaki Steel Corporation | Ferritic stainless steel sheet with excellent workability and method for making the same |
| US6733601B2 (en) | 2001-01-18 | 2004-05-11 | Jfe Steel Corporation | Ferritic stainless steel sheet with excellent workability |
| US7025838B2 (en) | 2001-01-18 | 2006-04-11 | Jfe Steel Corporation | Ferritic stainless steel sheet with excellent workability and method for making the same |
| EP1452616A1 (en) * | 2001-12-06 | 2004-09-01 | Nippon Steel Corporation | Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof |
| EP1452616A4 (en) * | 2001-12-06 | 2006-08-02 | Nippon Steel & Sumikin Sst | Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof |
| US7341637B2 (en) | 2001-12-06 | 2008-03-11 | Nippon Steel & Sumikin Stainless Steel Corporation | Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof |
| JP2007039759A (en) * | 2005-08-04 | 2007-02-15 | Nippon Steel Corp | Method for producing hot dip plated steel sheet, pretreatment cleaning device, and hot dip plating line equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH067951B2 (en) | 1994-02-02 |
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