JPH02138479A - Production of grain oriented electrical steel sheet having extremely good blanking property - Google Patents
Production of grain oriented electrical steel sheet having extremely good blanking propertyInfo
- Publication number
- JPH02138479A JPH02138479A JP20008788A JP20008788A JPH02138479A JP H02138479 A JPH02138479 A JP H02138479A JP 20008788 A JP20008788 A JP 20008788A JP 20008788 A JP20008788 A JP 20008788A JP H02138479 A JPH02138479 A JP H02138479A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- coating
- electrical steel
- annealing
- oriented electrical
- 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
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000000576 coating method Methods 0.000 claims abstract description 43
- 238000000137 annealing Methods 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000002932 luster Substances 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 8
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 7
- 238000005261 decarburization Methods 0.000 abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005097 cold rolling Methods 0.000 abstract description 4
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 abstract description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 229920002554 vinyl polymer Polymers 0.000 abstract description 2
- 238000004080 punching Methods 0.000 description 16
- 239000011521 glass Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000011162 core material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 3
- 239000004137 magnesium phosphate Substances 0.000 description 3
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 3
- 229960002261 magnesium phosphate Drugs 0.000 description 3
- 235000010994 magnesium phosphates Nutrition 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- BCFSVSISUGYRMF-UHFFFAOYSA-N calcium;dioxido(dioxo)chromium;dihydrate Chemical compound O.O.[Ca+2].[O-][Cr]([O-])(=O)=O BCFSVSISUGYRMF-UHFFFAOYSA-N 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- NINOVVRCHXVOKB-UHFFFAOYSA-N dialuminum;dioxido(dioxo)chromium Chemical compound [Al+3].[Al+3].[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O NINOVVRCHXVOKB-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 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 1
- 238000010438 heat treatment Methods 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- CRGGPIWCSGOBDN-UHFFFAOYSA-N magnesium;dioxido(dioxo)chromium Chemical compound [Mg+2].[O-][Cr]([O-])(=O)=O CRGGPIWCSGOBDN-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- 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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- 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
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、打抜き性が極めてすぐれた方向性電磁鋼板の
製造法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing grain-oriented electrical steel sheets with extremely excellent punchability.
（従来の技術）
方向性電磁鋼板は一般に次のようにして製造される。即
ちＳｉを４．０％以下含有する珪素鋼スラブを熱間圧延
し、焼鈍しであるいは焼鈍せずに１回または中間焼鈍を
挟んで２回以上の冷間圧延を施して最終板厚とし、脱炭
焼鈍を行って鋼板表面にＳｉｎ□を含む酸化膜を生成さ
せ、次いでＭｇＯを主な成分とする焼鈍分離剤を塗布し
て乾燥してコイルに巻き取り、その後、高温の仕上焼鈍
を行ないゴス方位の２次再結晶粒を発達させるとともに
、グラス被膜を形成させ、次いで必要に応じて絶縁コー
テイング液を塗布し焼付熱処理を行って絶縁コーティン
グ被膜を形成させる。(Prior Art) Grain-oriented electrical steel sheets are generally manufactured as follows. That is, a silicon steel slab containing 4.0% or less of Si is hot-rolled and cold-rolled once with or without annealing or twice or more with intermediate annealing in between to obtain the final plate thickness, Decarburization annealing is performed to generate an oxide film containing Sin□ on the surface of the steel sheet, then an annealing separator containing MgO as the main component is applied, dried and wound into a coil, followed by high-temperature finish annealing. While developing secondary recrystallized grains in the Goss orientation, a glass film is formed, and then, if necessary, an insulating coating liquid is applied and a baking heat treatment is performed to form an insulating coating film.
方向性電磁鋼板は発電機、変圧器などの電気機器の鉄心
材料として用いられるが、鉄心は通常金型で打抜かれ、
あるいは剪断により、所定形状とされた鉄心単板を多数
枚積層して製作される。例えばタービン発電機の鉄心を
製作するにはその容量にもよるが鉄心単板を１０〜２０
万枚程度も要する。これら鉄心単板は打抜き返りが小さ
いこと、例えば３０ｆ１１以下であることが、当該鉄心
単板を積層した場合、鉄心の端面短絡による鉄損の異常
増加防止に対して重要である。また鉄心製作加工を容易
とするためにも打抜き返りが小さいことが望まれる。Grain-oriented electrical steel sheets are used as core materials for electrical equipment such as generators and transformers, but the core is usually punched with a die.
Alternatively, it is manufactured by laminating a large number of single iron core plates that have been shaped into a predetermined shape by shearing. For example, to manufacture the iron core of a turbine generator, 10 to 20 iron core veneers are required, depending on its capacity.
It takes about 10,000 pieces. It is important that these core veneers have a small punching return, for example, 30 f11 or less, in order to prevent an abnormal increase in iron loss due to short circuits on the end faces of the core when the core veneers are laminated. In addition, it is desired that the punching return be small in order to facilitate the manufacturing process of the core.
方向性電磁鋼板にはグラス被膜あるいは該被膜と絶縁コ
ーティング被膜の２重の絶縁被膜が形成されている。グ
ラス被膜は鋼板に張力を与えて鉄損を低下させる作用が
あるが、反面、硬質であるために打抜きを行なう際、金
型を摩耗せしめる。A grain-oriented electrical steel sheet is provided with a glass coating or a double insulating coating consisting of the glass coating and an insulating coating. The glass coating has the effect of applying tension to the steel plate and reducing iron loss, but on the other hand, since it is hard, it wears out the die during punching.
このため例えば数１ｏｏｏ回打抜くと、打抜き返りが所
定値以上発生し、金型の再研磨あるいは新品との取替え
を行わなければならない。これは作業性を著しく低下さ
せ、またコスト上昇などを招くことになる。For this reason, if the die is punched several times, for example, the punching back will occur to a predetermined value or more, and the die must be re-polished or replaced with a new one. This significantly reduces workability and increases costs.
打抜き性を高めるために、グラス被膜の生成を抑制した
方向性電磁鋼板の製造方法が提案されている。例えば特
開昭５３−２２１１３号公報記載の方法は脱炭焼鈍で形
成する電磁鋼板表面の酸化膜厚みを３μｍ以下とし、焼
鈍分離剤として、含水珪酸塩鉱物粉末を配合した微粒子
のアルミナを用いて鋼板に塗布し仕上焼鈍している。か
くして酸化膜の薄目付きと含水珪酸塩鉱物粉末の配合に
よって剥離しやすいグラス被膜を鋼板表面に形成して、
打抜き性の向上を図っている。また特開昭５９−９６２
７８号公報記載の方法では焼鈍分離剤として、粒度の大
きさが１０μｍ以下の微粒子アルミナと１３００°Ｃ以
上の高温で焼成した不活性ＭｇＯを用いることにより、
鋼板表面の酸化膜との反応を抑制して、グラス被膜の形
成を防ぐことが提案されている。アルミナは酸化膜中の
ＳｔＯ□との反応性が弱いので、打抜き性向上にそれな
りの効果が奏される。In order to improve punchability, a method for producing grain-oriented electrical steel sheets that suppresses the formation of glass coatings has been proposed. For example, the method described in JP-A No. 53-22113 uses a method in which the thickness of the oxide film on the surface of the electrical steel sheet formed by decarburization annealing is 3 μm or less, and fine-particle alumina mixed with hydrated silicate mineral powder is used as the annealing separator. It is applied to steel plates and finish annealed. In this way, a glass film that is easy to peel off is formed on the surface of the steel plate by the thin oxide film and the combination of hydrated silicate mineral powder.
Efforts are being made to improve punching performance. Also, JP-A-59-962
In the method described in Publication No. 78, fine particle alumina with a particle size of 10 μm or less and inert MgO calcined at a high temperature of 1300°C or higher are used as annealing separators.
It has been proposed to prevent the formation of a glass film by suppressing the reaction with the oxide film on the surface of the steel sheet. Since alumina has weak reactivity with StO□ in the oxide film, it has a certain effect on improving punching performance.
（発明が解決しようとする課題）
これらの提案により、方向性電磁鋼板の表面のグラス被
膜の生成が防止され、金属光沢を有する方向性電磁鋼板
が得られ、斯くして打抜き性の改善が図られている。し
かし実操業ラインでは例えば脱炭焼鈍では雰囲気ガスの
露点、組成が変化することがあり、あるいは温度偏差等
により鋼板表面に形成される酸化膜は部分的に厚み差が
生じる。(Problems to be Solved by the Invention) Through these proposals, it is possible to prevent the formation of a glass film on the surface of a grain-oriented electrical steel sheet, obtain a grain-oriented electrical steel sheet with metallic luster, and thus improve punchability. It is being However, in an actual production line, for example, during decarburization annealing, the dew point and composition of the atmospheric gas may change, or the oxide film formed on the surface of the steel sheet may have local thickness differences due to temperature deviations.
これがグラス被膜の剥離性や、被膜形成抑制状態に影響
を及ぼし、打抜き性は十分に満足し得るまでに良好であ
るとは言い難い。This affects the releasability of the glass coating and the suppression of coating formation, and it is difficult to say that the punching properties are sufficiently good.
本発明は打抜き性が著しく優れており、２かつ極めて多
数回の打抜きに際しても金型に摩耗を生ぜしめることの
ない方向性電磁鋼板の製造方法を提供することを目的と
する。An object of the present invention is to provide a method for manufacturing a grain-oriented electrical steel sheet which has extremely excellent punching properties and which does not cause wear on the mold even when punching is performed twice or an extremely large number of times.
（課題を解決するための手段）
本発明の要旨とするところは、金属光沢面を有する方向
性電磁鋼板を平坦化焼鈍する前に、鋼板表面に無機系コ
ーティングを施し、平坦化焼鈍し、その後有機系コーテ
ィングまたは有機系と無機系を混じえたコーティングを
施すことを特徴とする打抜き性が極めてすぐれた方向性
電磁綱板の製造法にある。(Means for Solving the Problems) The gist of the present invention is that before flattening and annealing a grain-oriented electrical steel sheet having a metallic luster surface, an inorganic coating is applied to the surface of the steel sheet, the flattening annealing is carried out, and then The present invention provides a method for producing a oriented electromagnetic steel sheet with extremely excellent punching properties, characterized by applying an organic coating or a mixed organic and inorganic coating.
以下に本発明について詳細に説明する。The present invention will be explained in detail below.
本発明者達は方向性電磁鋼板の打抜き性を向上させるた
めに実験し、検討した。そして先に特願昭６２−２１．
５２２４号にて仕上焼鈍の焼鈍分離剤にアルカリ金属ま
たはアルカリ土類金属の塩化物の１種又は２種以上を２
〜４０重量％配合したものを用いて、鋼表面のグラス被
膜生成を防止し、金属光沢を有する方向性電磁鋼板の製
造法を提案した。The present inventors conducted experiments and studies to improve the punchability of grain-oriented electrical steel sheets. And first, the patent application 1986-21.
No. 5224 uses one or more chlorides of alkali metals or alkaline earth metals as an annealing separator for finish annealing.
We proposed a method for producing grain-oriented electrical steel sheets that prevent the formation of a glass film on the steel surface and have metallic luster by using a blend of ~40% by weight.
さらに検討したところ、方向性電磁鋼板は仕上焼鈍後に
板形状矯正のために平坦化焼鈍が行なわれるが、この際
金属光沢面は雰囲気を極力ドライに保っても鋼板表面に
酸化層を形成し、この酸化層が打ち抜き性及び磁気特性
の劣化をもたらすことが確かめられた。Further investigation revealed that grain-oriented electrical steel sheets are subjected to flattening annealing to correct the sheet shape after finish annealing, but at this time, even if the atmosphere is kept as dry as possible, the shiny metallic surface forms an oxide layer on the surface of the steel sheet. It has been confirmed that this oxide layer causes deterioration of punchability and magnetic properties.
この阻害要因をなくすべく、実験した結果、本発明が構
成されたものである。すなわち、金属光沢面を有する方
向性電磁ｍ仮を平坦化焼鈍する前に、鋼板表面に無機系
コーティングを施し、平坦化焼鈍を行ない、しかる後、
有機系コーティングまたは有機系と無機系を混じえたコ
ーティングを施すことにより、打ち抜き性が著しく向上
する他、良好な磁気特性が得られる。The present invention was constructed as a result of experiments to eliminate this inhibiting factor. That is, before flattening and annealing the directional electromagnetic material having a metallic luster surface, an inorganic coating is applied to the surface of the steel plate, flattening is performed, and then,
By applying an organic coating or a mixed organic and inorganic coating, punching properties are significantly improved and good magnetic properties can be obtained.
本発明が適用される方向性電磁鋼板の成分組成および仕
上焼鈍終了までのプロセスについては特定する必要はな
い。There is no need to specify the chemical composition and the process up to the end of final annealing of the grain-oriented electrical steel sheet to which the present invention is applied.
即ち、Ｓｉを４．０％以下含有しインヒビター形成元素
あるいは粒界に偏析し２次再結晶を発現せしめる成分を
含んだ電磁鋼スラブを、熱間圧延し、焼鈍し、あるいは
焼鈍せずに１回または中間焼鈍をはさんで２回以上の冷
間圧延にて最終板厚とし、脱炭焼鈍する。次いで焼鈍分
離剤を塗布して仕上焼鈍するが、焼鈍分離剤は綱板表面
のＳｉｎ、を含む酸化膜と反応せずにグラス被膜を形成
しないもの、例えばＭｇ０１００重量部に対してアルカ
リ金属またはアルカリ土類金属の塩化物を２〜４０重量
部配合したものが用いられる。剥離しやすいグラス被膜
を形成せしめる微粒子アルミナを用いてもよい。That is, an electrical steel slab containing 4.0% or less of Si and containing an inhibitor-forming element or a component that segregates at grain boundaries and causes secondary recrystallization is hot-rolled, annealed, or unannealed. The final plate thickness is obtained by cold rolling two or more times with two or more intermediate annealing steps in between, and decarburization annealing is performed. Next, an annealing separator is applied and finish annealing is performed. A mixture containing 2 to 40 parts by weight of an earth metal chloride is used. Particulate alumina, which forms a glass coating that is easy to peel off, may also be used.
要するに焼鈍分離剤はグラス被膜の形成抑制あるいは剥
離性を良くするものであれば、いずれでもよい。In short, any annealing separator may be used as long as it suppresses the formation of the glass film or improves its peelability.
仕上焼鈍後、グラス被膜が残存していれば、酸洗などに
よって除去しても構わない。If the glass coating remains after final annealing, it may be removed by pickling or the like.
次いで、金属光沢面を有する方向性電磁鋼板は平坦化焼
鈍される。この焼鈍において、本発明では鋼板に酸化膜
が生じるのを防止し、打抜き性を一段と高めるように、
平坦化焼鈍前に金属光沢鋼板表面に無機系コーティング
剤を塗布する。例えば、リン酸、リン酸アルミニウム、
リン酸マグネシウム、リン酸カルシウム、リン酸亜鉛、
リン酸マンガン等のリン酸塩、クロム酸、クロム酸マグ
ネシウム、クロム酸アルミニウム、クロム酸カルシウム
、クロム酸亜鉛等のクロム酸塩２重クロム酸塩、コロイ
ダルシリカの１種または２種以上を塗布する。その塗布
量は０．５〜２．５ｇ／ｒ＋（とすることが好ましい。Next, the grain-oriented electrical steel sheet having a metallic luster surface is flattened and annealed. In this annealing, the present invention prevents the formation of an oxide film on the steel sheet and further improves punchability.
An inorganic coating agent is applied to the surface of the metallic gloss steel sheet before flattening annealing. For example, phosphoric acid, aluminum phosphate,
Magnesium phosphate, calcium phosphate, zinc phosphate,
Apply one or more of phosphates such as manganese phosphate, chromic acid, magnesium chromate, aluminum chromate, calcium chromate, chromate dichromates such as zinc chromate, and colloidal silica. . The coating amount is preferably 0.5 to 2.5 g/r+.
また無機系コーティングにはホウ酸、ホウ酸塩、ケイ酸
塩が添加されていてもよい。Further, boric acid, borates, and silicates may be added to the inorganic coating.
無機系コーティングを塗布した後、平坦化焼鈍を８００
〜８７０°Ｃで行なう。この温度は鋼板の形状を矯正す
るために決められるものである。本発明では前記コーテ
ィングが鋼板に付着しているので、雰囲気ガスによって
全く酸化されず、打抜き性が高められるとともに磁気特
性も良好となる。After applying the inorganic coating, flattening annealing is performed at 800°C.
Perform at ~870°C. This temperature is determined to correct the shape of the steel plate. In the present invention, since the coating is adhered to the steel plate, it is not oxidized by atmospheric gas at all, and the punching properties are improved and the magnetic properties are also improved.
次いで、有機系絶縁コーティングまたは有機系と無機系
を混じえた絶縁コーティングが塗布され、例えば２５０
〜３５０°Ｃにて焼付けられ、絶縁被膜が形成される。Next, an organic insulating coating or a mixed organic and inorganic insulating coating is applied, e.g.
Baking is performed at ~350°C to form an insulating film.
有機系コーティングとしては例えばアクリル系、スチレ
ン、ポリビニール、メラミン、フェノール、シリコン、
酢酸ビニール。Examples of organic coatings include acrylic, styrene, polyvinyl, melamine, phenol, silicone,
vinyl acetate.
エポキシ系等が用いられる。之等の有機系コーティング
のみによっても方向性電磁鋼板の打抜き性は良好となる
が、本発明に従いに、無機系コーティングにより酸化膜
の発生を防止したうえに、有機系コーティングまたは有
機系コーティングに前記無機系コーティング剤を混じえ
たコーティングを塗布し焼付けた方向性電磁鋼板は打抜
き性が飛躍的に向上する。Epoxy type etc. are used. Although the punching properties of grain-oriented electrical steel sheets can be improved only by organic coatings such as these, in accordance with the present invention, in addition to preventing the formation of oxide films by using inorganic coatings, the organic coatings or the above-mentioned organic coatings are The punchability of grain-oriented electrical steel sheets coated with a coating containing an inorganic coating agent and baked is dramatically improved.
次に実施例について述べる。Next, an example will be described.
実施例
重量％でＣ：０．０４％、Ｓｉ：３．１％、Ｍｎ；０．
０６％。Example weight percentage: C: 0.04%, Si: 3.1%, Mn: 0.
06%.
Ｓ ： ０．０２％、 Ａｌ ： ０．００１％、 Ｎ
： ０．００５％残部が鉄および不可避的不純物から
なるスラブを１４００″Ｃで加熱し、２．１ ｍｍＯ熱
延コイルに仕上げた後、酸洗を行ない、０．７５＋ｎｍ
迄−次冷延を行い、９５０°Ｃ×６０秒の中間焼鈍を行
い、０．３５ｍｍまで最終冷延を行う。次いで８４０°
Ｃで脱炭焼鈍を行い、１０％（重量％）のＣａＣ１ｚを
含んだｈｇｏを塗布し、仕上焼鈍を実施した。S: 0.02%, Al: 0.001%, N
: A slab consisting of 0.005% balance iron and unavoidable impurities is heated at 1400''C and finished into a 2.1 mmO hot-rolled coil, then pickled to a thickness of 0.75+nm.
Next cold rolling is carried out, intermediate annealing is carried out at 950°C for 60 seconds, and final cold rolling is carried out to 0.35 mm. then 840°
Decarburization annealing was performed with C, hgo containing 10% (wt%) CaClz was applied, and finish annealing was performed.
その後、鋼板表面のｈｇｏを水洗した後、以下の４条件
−乙平坦化焼鈍（８５０°Ｃ×９０秒）と絶縁被膜コー
ティング処理（３００°Ｃ×１０秒）を行なった。Thereafter, after washing the hgo on the surface of the steel plate with water, the following four conditions - flattening annealing (850°C x 90 seconds) and insulation film coating treatment (300°C x 10 seconds) were performed.
（条件１）リン酸アルミニウム系の無機コーティングを
”２ ｇ／ｒＴｆの量で塗布し、次いで平坦化焼鈍を
行なった。（０乾燥
後重Ｍ）
（条件２）Ｎ、９８％十Ｈ，２％のドライ雰囲気中で平
坦化焼鈍を行ない、しかる後、
リン酸マグネシウムをベースに有機質
アクリルスチレンを含んだ有機系コー
ティングを２ ｇ／ｒｒｆＯ量で塗布し焼付処理。(Condition 1) An inorganic coating of aluminum phosphate was applied in an amount of 2 g/rTf, and then flattened annealing was performed. (0 weight after drying M) (Condition 2) N, 98% 10H, 2 After that, an organic coating based on magnesium phosphate and containing organic acrylic styrene was applied at an amount of 2 g/rrfO and baked.
（条件３）条件１の後、リン酸マグネシウムをベースに
有機質アクリルスチレンを含ん
だ有機系コーティングを２ ｇ ／ ｎ（の量で塗布し
焼付処理。(Condition 3) After Condition 1, an organic coating containing organic acrylic styrene based on magnesium phosphate was applied in an amount of 2 g/n and baked.
（条件４）条件１の後、有機系のエポキシ樹脂を２ｇ／
ｒｒ′ｒの量で塗布し焼付処理。(Condition 4) After condition 1, add 2g/g of organic epoxy resin.
Apply in the amount of rr'r and bake.
得られた鋼板について打抜き性と磁気特性を試験し、そ
の結果を第１表に示す。The obtained steel plate was tested for punchability and magnetic properties, and the results are shown in Table 1.
（発明の効果）
この結果から明らかなように、本発明によると打抜き返
り高さが所定値になるまでの打抜き回数が７１〜７５万
回と非常に多く、打抜き性が極やですぐれた方向性電磁
鋼板を提供することが出来る。(Effects of the Invention) As is clear from this result, according to the present invention, the number of punching operations until the punching return height reaches a predetermined value is as large as 710,000 to 750,000 times, and the punching performance is extremely high. It is possible to provide a magnetic steel sheet with high properties.
Claims (1)
に、鋼板表面に無機系コーティングを施し、平坦化焼鈍
し、その後有機系コーティングまたは有機系と無機系を
混じえたコーティングを施すことを特徴とする打抜き性
が極めてすぐれた方向性電磁鋼板の製造法。Before flattening and annealing a grain-oriented electrical steel sheet with a metallic luster surface, an inorganic coating is applied to the surface of the steel sheet, flattening annealing is performed, and then an organic coating or a mixed organic and inorganic coating is applied. A method for producing grain-oriented electrical steel sheets with extremely excellent punchability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20008788A JPH0762256B2 (en) | 1988-08-02 | 1988-08-12 | Manufacturing method of grain-oriented electrical steel sheet with excellent punchability |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19329788 | 1988-08-02 | ||
| JP63-193297 | 1988-08-02 | ||
| JP20008788A JPH0762256B2 (en) | 1988-08-02 | 1988-08-12 | Manufacturing method of grain-oriented electrical steel sheet with excellent punchability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02138479A true JPH02138479A (en) | 1990-05-28 |
| JPH0762256B2 JPH0762256B2 (en) | 1995-07-05 |
Family
ID=26507793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20008788A Expired - Fee Related JPH0762256B2 (en) | 1988-08-02 | 1988-08-12 | Manufacturing method of grain-oriented electrical steel sheet with excellent punchability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762256B2 (en) |
-
1988
- 1988-08-12 JP JP20008788A patent/JPH0762256B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0762256B2 (en) | 1995-07-05 |
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