JPH0238582A - Electrical steel sheet with formed insulating coating film - Google Patents
Electrical steel sheet with formed insulating coating filmInfo
- Publication number
- JPH0238582A JPH0238582A JP18894888A JP18894888A JPH0238582A JP H0238582 A JPH0238582 A JP H0238582A JP 18894888 A JP18894888 A JP 18894888A JP 18894888 A JP18894888 A JP 18894888A JP H0238582 A JPH0238582 A JP H0238582A
- Authority
- JP
- Japan
- Prior art keywords
- film
- steel sheet
- electrical steel
- coating film
- silicate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 title abstract description 11
- 239000011248 coating agent Substances 0.000 title abstract description 10
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 14
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract description 8
- 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 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 14
- 238000004080 punching Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000002131 composite material Substances 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000011162 core material Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- 229910020091 MgCa Inorganic materials 0.000 description 1
- 101100003996 Mus musculus Atrn gene Proteins 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- PZJJKWKADRNWSW-UHFFFAOYSA-N trimethoxysilicon Chemical compound CO[Si](OC)OC PZJJKWKADRNWSW-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、モーターやトランス等のコア材として使用さ
れる絶縁皮膜の施された電磁鋼板に関し、より詳細には
、絶縁性、耐熱性、溶接性等が良好であるばかりでなく
、スリット加工や打抜き加工等に耐え得る優れた密着性
を示す絶縁皮膜の形成された電磁鋼板に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrical steel sheet coated with an insulating film and used as a core material for motors, transformers, etc. The present invention relates to an electrical steel sheet formed with an insulating film that not only has good weldability but also has excellent adhesion that can withstand slitting, punching, etc.
[従来の技術]
モーターやトランス等におけるコア第2として使用され
る電磁鋼板には、渦電流損失を低減するための絶縁皮膜
か施される。この皮膜は電気絶縁性だけてなく、耐食性
、打抜き性、溶接性、耐熱性等においても優れたもので
あることが要求される。[Prior Art] Electrical steel sheets used as second cores in motors, transformers, etc. are coated with an insulating coating to reduce eddy current loss. This film is required to have excellent not only electrical insulation properties but also corrosion resistance, punchability, weldability, heat resistance, etc.
方、電磁鋼板に対し絶縁皮膜を形成する方法として従来
から行なわれているのは、
(1)有機樹脂を塗布し乾燥後焼付けする方法、(2)
クロム酸塩を主成分とする無機物を塗布し乾燥後焼付け
する方法、
(3)珪酸リチウム等の無機珪酸塩を塗布し乾燥後焼付
けする方法、
(4)クロム酸塩を主成分とする無機物と有機樹脂との
混合物を塗布し乾燥後焼付けする方法、
等である。しかしながら上記(1)の方法により得られ
る皮膜は耐熱性と溶接性が不十分であり、また上記(2
)及び(3)の方法により得られる皮膜は打抜き性が悪
い。また上記(4)の方法により得られる皮膜は、上記
(1)の欠点とされる耐熱性や溶接性は良好であるもの
の、歪取り焼鈍による絶縁性の低下が著しい。On the other hand, the conventional methods of forming an insulating film on electrical steel sheets are: (1) applying organic resin and baking after drying; (2)
(3) A method of applying an inorganic silicate such as lithium silicate and baking after drying; (4) A method of applying an inorganic material mainly composed of chromate and baking after drying; (4) A method of applying an inorganic material mainly composed of chromate and baking after drying; This method involves applying a mixture with an organic resin, drying it, and then baking it. However, the film obtained by the method (1) above has insufficient heat resistance and weldability, and the film obtained by the method (2) above has insufficient heat resistance and weldability.
The films obtained by methods () and (3) have poor punchability. Further, although the film obtained by the method (4) above has good heat resistance and weldability, which are the drawbacks of the above (1), the insulation properties are significantly lowered by strain relief annealing.
本発明者らはこうした絶縁皮膜に指摘される欠点を解消
し、電気絶縁性、耐食性、打抜き性、溶接性、耐熱性等
の要求特性をすべて満たす様な皮膜の開発を期して色々
研究を行なった結果、電磁鋼板の表面に珪酸塩皮膜を形
成し、その上にクロム酸、燐酸塩またはそれらの塩の1
種以上を含む上層皮膜を形成した複合皮膜、及びこれら
の皮膜中に適量の有機樹脂を含有させた複合皮膜を開発
した(特開昭63−57781号公報)。The inventors of the present invention have conducted various studies in hopes of eliminating the drawbacks of these insulating films and developing a film that satisfies all required properties such as electrical insulation, corrosion resistance, punchability, weldability, and heat resistance. As a result, a silicate film was formed on the surface of the electrical steel sheet, and one of chromic acid, phosphate, or their salts was applied on top of the silicate film.
We have developed a composite film in which an upper layer film containing at least one type of organic resin is formed, and a composite film in which an appropriate amount of organic resin is contained in these films (Japanese Unexamined Patent Publication No. 57781/1981).
[発明が解決しようとする課題]
上記公開公報に開示した複合皮膜は、珪酸塩皮膜とクロ
ム酸塩及び/又は燐酸塩皮膜の複合効果によって優れた
絶縁性、打抜き性、耐熱性、溶接性等を有するものとな
り、従来の絶縁皮膜に比べると非常に優秀なものとなっ
た。ところがこの複合皮膜は、スリット加工や打抜き加
工時に皮膜の部が剥離するという難点があり、その点で
改善の余地を残していることが明らかになった。即ち電
磁鋼板を最終のコア材に加工する場合には、広幅コイル
を所定の幅にスリットした後所定の形状に打抜き加工さ
れるが、このとき電磁鋼板の表面には、剪断時鋼板を押
えておくためのスタビライザー(押え板)、あるいは巻
取りコイルに張力を与えておくための押え板(フェルト
やコルク等)等による強い押し付は力と摩擦が作用し、
密着性の悪い絶縁皮膜は摩擦等によって簡単に剥離され
、コア材としての性能が低下する。また剥離した皮膜く
ずがスタビライザーやフェルト等に付着堆積し、更には
打抜き工具にも付着することがあるため、清掃作業が面
倒になるといった様々の問題が生じてくる。[Problems to be Solved by the Invention] The composite film disclosed in the above publication has excellent insulation properties, punchability, heat resistance, weldability, etc. due to the combined effect of the silicate film and the chromate and/or phosphate film. This makes it extremely superior compared to conventional insulating films. However, this composite film has the drawback that parts of the film peel off during slitting or punching, and it has become clear that there is still room for improvement in this respect. That is, when processing an electromagnetic steel sheet into the final core material, a wide coil is slit to a predetermined width and then punched into a predetermined shape. Strong pressure using a stabilizer (pressing plate) to keep the winding coil in place, or a holding plate (felt, cork, etc.) to apply tension to the winding coil causes force and friction to act on it.
An insulating film with poor adhesion is easily peeled off due to friction, etc., and its performance as a core material deteriorates. In addition, peeled film debris may adhere and accumulate on stabilizers, felts, etc., and may even adhere to punching tools, causing various problems such as making cleaning work troublesome.
本発明はこの様な問題点に着目してなされたものであっ
て、その課題は、絶縁性、溶接性、耐熱性、打抜き性等
の要求性能をすべて満足し得るばかりでなく、密着性が
良好でスリット加工や打抜き加工等を行なったときでも
剥離しない様な絶縁皮膜の形成された電磁鋼板を提供し
ようとするものである。The present invention has been made with attention to such problems, and the object is to not only satisfy all required performances such as insulation, weldability, heat resistance, and punchability, but also to meet the requirements for adhesion. The object of the present invention is to provide an electromagnetic steel sheet on which an insulating film is formed that is good and does not peel off even when subjected to slitting, punching, etc.
[課題を解決するための手段]
上記課題を解決することのできた本発明の電磁鋼板は、
その表面に、珪酸塩皮膜を介してクロム酸、燐酸または
それらの塩の1種以上を含む上層皮膜よりなる絶縁皮膜
が形成されるか、あるいは上記両度膜の少なくとも一方
に有機樹脂を配合してなる電T111鋼板において、・
上記両度膜の一方若しくは双方にシランカップリング剤
を含有させ、皮膜自体の物性、特に耐摩耗性を高めると
共に密着性を改善したところに要旨を有するものであ[
イ乍用〕
本発明において電磁鋼板の表面に形成される珪酸塩皮膜
は、絶縁皮膜の下地層として密着性を高めるほか鋼板に
対して防錆機能を果たすものてあり、好ましいのは、5
in2に対してLi2O。[Means for solving the problems] The electrical steel sheet of the present invention that can solve the above problems has the following features:
An insulating film consisting of an upper film containing one or more of chromic acid, phosphoric acid, or their salts is formed on the surface via a silicate film, or an organic resin is blended into at least one of the above-mentioned films. In the electric T111 steel plate,
The gist is that one or both of the above films contain a silane coupling agent to enhance the physical properties of the film itself, particularly the abrasion resistance, and to improve the adhesion.
In the present invention, the silicate film formed on the surface of the electrical steel sheet not only serves as a base layer for the insulating film to improve adhesion but also has a rust-preventing function for the steel sheet.
Li2O for in2.
Na2 o、に20の1種または2 flu以上がモ、
llz比[5i02/(Li20”Na2O+に20)
] で271〜2o/1の範囲に複合されたものである
。その理由は、上記モル比が271を下回る場合は、珪
酸塩皮膜が吸湿し易くなって鋼板が変色したり発錆し易
くなる傾向があり、一方、20/1を超える場合は、後
述するシランカップリング剤の効果にもかかわらず電磁
鋼板に対する密着性が低下傾向を示す様になるからであ
る。Na2O, one of 20 types or 2 flu or more is mo,
llz ratio [5i02/(20 to Li20”Na2O+)
] It is a composite in the range of 271 to 2o/1. The reason for this is that if the molar ratio is less than 271, the silicate film tends to absorb moisture and the steel plate tends to discolor or rust. This is because, despite the effectiveness of the coupling agent, the adhesion to the electrical steel sheet tends to decrease.
上記珪酸塩皮膜の上に形成される上層皮膜の構成素材と
しては、クロム酸またはそのMgCa、Zn、Na、に
等の塩類、及び燐酸またはモのAl、Ca、Mg、Na
、に等の塩類が好ましいものとして例示される。The constituent materials of the upper layer film formed on the silicate film include chromic acid or its salts such as MgCa, Zn, Na, etc., and phosphoric acid or its salts such as Al, Ca, Mg, Na, etc.
Preferred examples include salts such as , and the like.
また上記珪酸塩皮膜及び/又は上層皮膜中に配合される
ことのある有機樹脂は、主として皮膜の打抜き加工性を
高める作用を有しており、具体的なものとしては水溶性
タイプあるいはエマルジョンタイプのアクリル系樹脂、
酢酸ビニル樹脂、ポリウレタン樹脂、エポキシ樹脂、フ
ェノール樹脂等が挙げられる。これらは単独で使用し得
るほか、必要により2種以上を組合せて使用することも
てきる。尚これらの有i樹脂による打抜き性改善効果は
、該樹脂を前記珪酸塩皮膜あるいは絶縁皮膜の一方のみ
に含有させるたけても有効に発揮されるか、両皮膜に適
量ずつ含有させれば打抜き性は一段と優れたものとなる
。有機樹脂の配合量は特に制限されないか、各皮膜中の
固形分換算景て5〜50重量%の範囲か好ましい。In addition, the organic resin that may be blended into the silicate film and/or the upper layer film mainly has the effect of improving the punching processability of the film, and specifically, water-soluble type or emulsion type organic resins are used. acrylic resin,
Examples include vinyl acetate resin, polyurethane resin, epoxy resin, and phenol resin. These can be used alone or in combination of two or more types if necessary. Note that the effect of improving punching property by these resins can be effectively exhibited even if the resin is contained in only one of the silicate film or the insulating film, or if the resin is contained in an appropriate amount in both films, the punching property can be improved. becomes even better. The blending amount of the organic resin is not particularly limited, and is preferably in the range of 5 to 50% by weight based on the solid content in each film.
次に上記珪酸塩皮膜あるいは上層皮膜の一方もしくは双
方に配合されるシランカップリング剤は、各皮膜自身の
物性を高めると共に皮膜同士及び電磁鋼板との密着性を
高め、スリット加工や打抜き加工時における皮膜の剥離
を防止するうえで欠くことのできない成分である。とこ
ろでシランカップリング剤の本来の機能から考えると、
シランカップリング剤は珪酸塩と有機樹脂の混合皮膜に
配合したときに限ってその特徴を有効に発揮するものと
考えられる。ところが後記実施例でも明らかにする如く
、シランカップリング剤の効果は上記の様な混合皮膜に
限って有効に発揮される訳ではなく、珪酸塩のみからな
る皮膜、あるいはクロム酸系及び/又は燐酸系のみから
なる上層皮膜に配合した場合でもその作用か有効に発揮
され、皮膜の耐剥離性を著しく改善し得ることが確認さ
れた。但しシランカップリング剤の添加効果が最も有効
に発揮されるのは、珪酸塩等の無機質と有機樹脂からな
る複合皮膜に配合したときであり、殊に下地層となる珪
酸塩皮膜と上層皮膜の両方にシランカップリング剤を配
合することによって最良の密着性を得ることができる。Next, the silane coupling agent that is blended into one or both of the silicate film and the upper layer film improves the physical properties of each film itself and the adhesion between the films and the electrical steel sheet, making it easier to use during slitting and punching. It is an indispensable ingredient in preventing peeling of the film. By the way, considering the original function of the silane coupling agent,
It is thought that the silane coupling agent effectively exhibits its characteristics only when it is blended into a mixed film of silicate and organic resin. However, as will be made clear in the examples below, the effect of the silane coupling agent is not limited to the above-mentioned mixed coating, and is not limited to coatings consisting only of silicate, or chromic acid and/or phosphoric acid. It was confirmed that even when added to the upper layer film consisting only of the system, its effect was effectively exhibited and the peeling resistance of the film could be significantly improved. However, the effect of adding a silane coupling agent is most effectively exhibited when it is blended into a composite film consisting of an inorganic substance such as a silicate and an organic resin, and especially when it is added to a composite film consisting of an inorganic substance such as a silicate and an organic resin. The best adhesion can be obtained by adding a silane coupling agent to both.
尚シランカップリング剤の配合量は、密着性改善効果と
塗装性の兼ね合いを考慮しつつ適当に決めればよいが、
最も一般的なのは固形分換算にして3〜25重量%の範
囲てあり、シランカップリング剤の含有率が3重量%未
満では密着性を十分に高めることができず、一方25重
量%を超える場合は塗料溶液が増結乃至ゲル化し易くな
って塗装作業性が悪化する。The amount of the silane coupling agent to be added may be determined appropriately while taking into consideration the balance between the adhesion improvement effect and the paintability.
The most common range is 3 to 25% by weight in terms of solid content, and if the content of the silane coupling agent is less than 3% by weight, the adhesion cannot be sufficiently improved, while if it exceeds 25% by weight. In this case, the paint solution tends to increase or gel, resulting in poor painting workability.
この様な作用を発揮するシランカップリング剤としては
、従来シランカップリング剤として使用されていたもの
を全て自由に適用することができるので、本発明におい
ては特に制限されないが、もっとも代表的なものとして
は下記一般式(式中、Xはアミン基、ビニル基、エポキ
シ基、メルカプト基、ハロゲン等を、またR1゜R2,
R3は同一または異なったメトキシ基やエトキシ基の様
な加水分解可能な基を表わす)
て表わされる化合物を例示することができ、要は珪酸塩
系溶液やクロム酸及び/又は燐酸系溶液あるいはこれら
と有機樹脂の混合溶液と均一に混合或は分散し得るもの
は特に好適である。As the silane coupling agent that exhibits such an effect, all conventionally used silane coupling agents can be freely applied, so the present invention is not particularly limited, but the most typical ones are used. is the following general formula (wherein, X is an amine group, a vinyl group, an epoxy group, a mercapto group, a halogen, etc., and
(R3 represents the same or different hydrolyzable groups such as methoxy or ethoxy groups) Examples include compounds represented by silicate solutions, chromic acid and/or phosphoric acid solutions, or Particularly preferred are those that can be uniformly mixed or dispersed with a mixed solution of organic resin and organic resin.
上記構成からなる皮膜の形成方法は格別限定されるもの
ではなく、常法に従って、たとえば下地層構成用皮膜形
成材料を含む単独溶液又は混合溶液(通常は水溶液もし
くはエマルジョン)を電磁鋼板上に塗布した後150〜
400℃程度で乾燥・焼付けし、次いで上層皮膜構成材
料を含む単独溶液又は混合溶液(通常は水溶液もしくは
エマルジョン)を塗布して上記と同程度の温度で乾燥・
焼付けを行なう。The method for forming the film having the above structure is not particularly limited, and for example, a single solution or a mixed solution (usually an aqueous solution or emulsion) containing the film-forming material for forming the base layer is applied onto the electrical steel sheet. After 150~
Dry and bake at about 400°C, then apply a single solution or mixed solution (usually an aqueous solution or emulsion) containing the upper layer film constituent materials, dry and bake at about the same temperature as above.
Perform baking.
[実施例]
厚さ0.5mm 、幅914mmの電磁鋼板(1%Si
)の表面に、第1表に示す皮膜形成剤をロールコータ−
で塗布した後焼付けした。但し珪酸塩を含む下地層形成
時の焼付は条件は270℃×60秒とし、上層皮膜を構
成する絶縁皮膜形成時の焼付は条件は330℃×90秒
に設定した。結果を第2表に示す。[Example] Electromagnetic steel plate (1% Si
) using a roll coater to apply the film forming agent shown in Table 1 on the surface of the
It was painted and then baked. However, the baking conditions for forming the base layer containing silicate were set at 270° C. for 60 seconds, and the baking conditions for forming the insulating film constituting the upper layer film were set at 330° C. for 90 seconds. The results are shown in Table 2.
但し第1表に示した各記号の意味は下記の通りである。However, the meaning of each symbol shown in Table 1 is as follows.
「にBM403J 信越化学社製のシランカップリン
グ剤[γ−グリシFキシブワビルトリ
メトキシシラン]
rsII603(J : l−−レシリコン社製のシ
ランカップリング剤[γ−メタクリロキシプロ
ピルトリメトキシシラン」
rLS412GI J :ヘキスト合成社製の有機樹脂
[スチレン・アクリル酸エステル共重合
体エマルジョン」
[モビニルDM7B5 J :ヘキスト合成社製の有
機樹脂しスチレン・ナクリル酸エステル
共重合体エマルジョン]
rへM750 J 帝国化学産業社製の水溶性アクリ
ル樹脂
また第2表に示した皮膜性能試験の方法及び評価法は下
記の通りである。BM403J Silane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd. [γ-GlycyF xibwavir trimethoxysilane] rsII603 (J: Silane coupling agent manufactured by l--Resilicon Co., Ltd. [γ-methacryloxypropyltrimethoxysilane] rLS412GI J: Organic resin [styrene/acrylic acid ester copolymer emulsion] manufactured by Hoechst Synthesis Co., Ltd. [Movinyl DM7B5 J: Organic resin [styrene/acrylic acid ester copolymer emulsion] manufactured by Hoechst Synthesis Co., Ltd.] r to M750 J Teikoku Kagaku Sangyo The water-soluble acrylic resin manufactured by Co., Ltd. and the film performance test and evaluation methods shown in Table 2 are as follows.
「絶縁性J : J I 5−C−2550に準拠し
て測定した層間抵抗(Ω・cm2/枚)によって評価。“Insulation J: Evaluated by interlayer resistance (Ω·cm2/sheet) measured in accordance with JI 5-C-2550.
「密着性J 皮膜の形成された各電1ifl鋼板をスリ
ットラインに通してスリットを行
ない、押え板(スタビライザー)及
び押え布(フェルト)に付着する皮
膜くずの状態を観察する。``Adhesion J'' Each electric steel plate with a film formed thereon is slit through a slit line, and the state of film debris adhering to the holding plate (stabilizer) and holding cloth (felt) is observed.
(判定)
◎;
○
△・
× ・
「打抜き性j
付着せず
付着量ごく少量
少量付着
多量付着
型材質・・・(SKDII) 、型形状・・・(10m
m角)、クリアランス・・・(10%)、打抜き油・・
・[エッソ7G3
(エッソ社製潤滑油)]、打抜き速
度・・・(300枚/分)の条件を設定して連続打抜き
テストを行ない、
かえり高さが50μmに達するまて
の打抜き枚数によって評価。(Judgment) ◎;○ △・×
m square), clearance...(10%), punching oil...
・Continuous punching test was conducted by setting the conditions of [Esso 7G3 (lubricating oil manufactured by Esso)] and punching speed (300 sheets/min), and the evaluation was based on the number of sheets punched until the burr height reached 50 μm. .
第
表
得る様になった。その結果電磁鋼板を用いたコア24等
の製品欠陥(絶縁皮膜の局部♀]」離)が解消されるほ
か、スタビライザーや打抜き工具の清浄または交換回数
を少なくすることかてき、作業性や生産性を高めること
かできる。Now I can get the table. As a result, product defects such as the core 24 made of electrical steel sheets (local separation of the insulation film) can be eliminated, and the number of cleaning or replacement of stabilizers and punching tools can be reduced, improving workability and productivity. It is possible to increase
第1,2表からも明らかである様に、下層(珪酸塩皮膜
)と上層(絶縁皮膜)の一方あるいは双方にシランカッ
プリング剤を配合した実施例1〜7の皮膜は、いずれも
安定した絶縁性を有しているはかりてなく高レベルの密
着性を有しており、連続打抜きテストでは90万枚ある
いは100万枚の打抜きを支障なく行なうことかできる
。As is clear from Tables 1 and 2, the films of Examples 1 to 7 in which a silane coupling agent was added to one or both of the lower layer (silicate film) and the upper layer (insulating film) were stable. It has insulating properties and an extremely high level of adhesion, and in continuous punching tests, it was possible to punch out 900,000 or 1 million sheets without any problem.
これに対し下層及び上層のいずれにもシランカップリン
グ剤が配合されていない比較例の皮膜は密着性か非常に
悪く、有機樹脂を含有させなかった場合(比較例1)は
もとより、相当量の有機樹脂を含有させた場合(比較例
2,3)でも、皮膜の密着性を満足のいく程度まで改善
することはできない。On the other hand, the film of the comparative example in which the silane coupling agent was not blended in either the lower layer or the upper layer had very poor adhesion. Even when an organic resin is contained (Comparative Examples 2 and 3), the adhesion of the film cannot be improved to a satisfactory extent.
[発明の効果][Effect of the invention]
Claims (2)
、燐酸またはそれらの塩の1種以上を含む上層皮膜より
なる絶縁皮膜が形成されてなる電磁鋼板において、 上記珪酸塩皮膜あるいは上層皮膜の少なくとも一方にシ
ランカップリング剤を含有させたものであることを特徴
とする、密着性の優れた絶縁皮膜の形成された電磁鋼板
。(1) An electrical steel sheet in which an insulating film consisting of an upper layer film containing one or more of chromic acid, phosphoric acid, or their salts is formed on the surface of the electrical steel sheet through a silicate film, the silicate film or the upper layer An electrical steel sheet on which an insulating film with excellent adhesion is formed, characterized in that at least one of the films contains a silane coupling agent.
、燐酸またはそれらの塩の1種以上を含む上層皮膜より
なる絶縁皮膜が形成され、且つ上記両皮膜の少なくとも
一方には有機樹脂を配合してなる電磁鋼板において、 上記両皮膜の少なくとも一方にシランカップリング剤を
含有させたものであることを特徴とする密着性の優れた
絶縁皮膜の形成された電磁鋼板。(2) An insulating film consisting of an upper layer film containing one or more of chromic acid, phosphoric acid, or their salts is formed on the surface of the electrical steel sheet via a silicate film, and at least one of the above films contains an organic resin. An electrical steel sheet formed with an insulating film with excellent adhesion, characterized in that at least one of the above-mentioned films contains a silane coupling agent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18894888A JPH0238582A (en) | 1988-07-28 | 1988-07-28 | Electrical steel sheet with formed insulating coating film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18894888A JPH0238582A (en) | 1988-07-28 | 1988-07-28 | Electrical steel sheet with formed insulating coating film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0238582A true JPH0238582A (en) | 1990-02-07 |
Family
ID=16232718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18894888A Pending JPH0238582A (en) | 1988-07-28 | 1988-07-28 | Electrical steel sheet with formed insulating coating film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0238582A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03243780A (en) * | 1990-02-20 | 1991-10-30 | Kobe Steel Ltd | Production of electrical steel sheet with insulating film ensuring superior adhesion and suitability to blanking |
EP0492306A2 (en) * | 1990-12-24 | 1992-07-01 | ARMCO Inc. | Steel sheet with enhanced corrosion resistance having a silane treated silicate coating |
WO1995024517A1 (en) * | 1994-03-07 | 1995-09-14 | University Of Cincinnati | Metal pretreated with an aqueous solution containing a dissolved inorganic silicate or aluminate, an organofunctional silane and a non-functional silane for enhanced corrosion resistance |
FR2731442A1 (en) * | 1995-03-09 | 1996-09-13 | Ugine Sa | METHOD FOR REALIZING A COATING ON AN ELECTRIC STEEL SHEET AND OBTAINED |
JP2001279460A (en) * | 2000-03-30 | 2001-10-10 | Kawasaki Steel Corp | Manufacturing method for grain oriented silicon steel sheet extremely low in core loss |
JP2004068031A (en) * | 2002-08-01 | 2004-03-04 | Jfe Steel Kk | Electromagnetic steel sheet with insulation coating |
JP2004068032A (en) * | 2002-08-01 | 2004-03-04 | Jfe Steel Kk | Electromagnetic steel sheet with insulation coating |
WO2009072648A1 (en) | 2007-12-07 | 2009-06-11 | Dipsol Chemicals Co., Ltd. | Surface-treating aqueous solution and treatment methods for forming corrosion-resistant coating film over zinc or zinc alloy deposit |
WO2013031200A1 (en) | 2011-08-31 | 2013-03-07 | Jfeスチール株式会社 | Electromagnetic steel sheet having insulating coating |
CN111318434A (en) * | 2018-12-13 | 2020-06-23 | 宝山钢铁股份有限公司 | Treatment method of non-oriented electrical steel material |
-
1988
- 1988-07-28 JP JP18894888A patent/JPH0238582A/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03243780A (en) * | 1990-02-20 | 1991-10-30 | Kobe Steel Ltd | Production of electrical steel sheet with insulating film ensuring superior adhesion and suitability to blanking |
EP0492306A3 (en) * | 1990-12-24 | 1995-10-11 | Armco Steel Co Lp | Steel sheet with enhanced corrosion resistance having a silane treated silicate coating |
EP0492306A2 (en) * | 1990-12-24 | 1992-07-01 | ARMCO Inc. | Steel sheet with enhanced corrosion resistance having a silane treated silicate coating |
AU677121B2 (en) * | 1994-03-07 | 1997-04-10 | University Of Cincinnati, The | Metal pretreated with an aqueous solution containing a dissolved inorganic silicate or aluminate, an organofunctional silane and a non-functional silane for enhanced corrosion resistance |
WO1995024517A1 (en) * | 1994-03-07 | 1995-09-14 | University Of Cincinnati | Metal pretreated with an aqueous solution containing a dissolved inorganic silicate or aluminate, an organofunctional silane and a non-functional silane for enhanced corrosion resistance |
FR2731442A1 (en) * | 1995-03-09 | 1996-09-13 | Ugine Sa | METHOD FOR REALIZING A COATING ON AN ELECTRIC STEEL SHEET AND OBTAINED |
EP0735117A1 (en) * | 1995-03-09 | 1996-10-02 | USINOR SACILOR Société Anonyme | Process for coating an electrical steel sheet and electrical sheet made by this method |
JP2001279460A (en) * | 2000-03-30 | 2001-10-10 | Kawasaki Steel Corp | Manufacturing method for grain oriented silicon steel sheet extremely low in core loss |
JP2004068031A (en) * | 2002-08-01 | 2004-03-04 | Jfe Steel Kk | Electromagnetic steel sheet with insulation coating |
JP2004068032A (en) * | 2002-08-01 | 2004-03-04 | Jfe Steel Kk | Electromagnetic steel sheet with insulation coating |
WO2009072648A1 (en) | 2007-12-07 | 2009-06-11 | Dipsol Chemicals Co., Ltd. | Surface-treating aqueous solution and treatment methods for forming corrosion-resistant coating film over zinc or zinc alloy deposit |
WO2013031200A1 (en) | 2011-08-31 | 2013-03-07 | Jfeスチール株式会社 | Electromagnetic steel sheet having insulating coating |
CN111318434A (en) * | 2018-12-13 | 2020-06-23 | 宝山钢铁股份有限公司 | Treatment method of non-oriented electrical steel material |
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