JP2005120443A - Steel sheet and iron core having excellent bending workability in sheet face and magnetic property - Google Patents
Steel sheet and iron core having excellent bending workability in sheet face and magnetic property Download PDFInfo
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Description
本発明は、モ−タやトランスの鉄芯と鉄芯用の鋼板に関するものである。 The present invention relates to an iron core of a motor or a transformer and a steel sheet for the iron core.
近年、省エネルギーの観点から各種電気機器の効率向上が求められている。電機機器の効率は各種要因に影響されるが、モーターやトランスの鉄芯で発生する損失である鉄損は比較的大きな比重を占めており、従って、最近では、より鉄損の少ない電磁鋼板が使用される場合が増加している。 In recent years, there has been a demand for improved efficiency of various electric devices from the viewpoint of energy saving. Although the efficiency of electrical equipment is affected by various factors, iron loss, which is a loss generated in the iron core of motors and transformers, occupies a relatively large specific gravity. Therefore, recently, electrical steel sheets with less iron loss have been used. The use is increasing.
このような電磁鋼板を用いて、モ−タやトランス等の積層鉄芯を製造する方法としては、鋼板を打抜き、所定枚数を単位鉄芯として積層し、ボルト締め、カシメ、溶接を用いて固着するのが一般的である。このように固着された積層鉄芯は、巻線コイルの組立て工程を経て、最終的にモ−タやトランスの一部品として組込まれる。 As a method of manufacturing a laminated iron core such as a motor or a transformer using such an electromagnetic steel sheet, the steel sheet is punched out, a predetermined number of sheets are laminated as a unit iron core, and fixed by bolting, caulking, or welding. It is common to do. The laminated iron core thus fixed is finally assembled as a part of a motor or a transformer through an assembly process of a winding coil.
ところで、最近、鉄損を低減する方法として、高合金化による高硬質化、板厚の薄手化が著しく進みつつあり、そのための打抜き工程、積層工程の加工性、生産性低下が問題になってきている。 By the way, recently, as a method of reducing iron loss, high hardness due to high alloying and thinning of the plate thickness are remarkably progressing, and the punching process, laminating process workability, and productivity reduction have become problems. ing.
また、一体打抜きの場合、鋼板全体の特性が反映されるため、ある特定の方向の特性が優れていても、その良さが鉄芯全体の性能として現れないという問題がある。 Moreover, in the case of integral punching, since the characteristics of the entire steel sheet are reflected, there is a problem that even if the characteristics in a specific direction are excellent, the goodness does not appear as the performance of the entire iron core.
これらの課題については、これまでも様々述べられている（特許文献１〜９、参照）。
Various issues have been described so far (see
特許文献１には、Ｐ０．０３％未満、Ｂ０．０００５〜０．０１％、平均結晶粒径３０μｍ以下の加工性と磁気特性の優れた高張力無方向性電磁鋼板が開示されている。特許文献２には、Ｃ０．００５％以下、Ａｌ０．１５〜０．５０％、降伏点２３０Ｎ／ｍｍ2以下、降伏伸び１％以下の曲げ加工に優れた無方向性電磁鋼板が開示されている。
特許文献３には、Ｃｒ１．５〜２０％、Ｓｉ２．５〜１０％、（Ｃ＋Ｎ）１００ｐｐｍ以下、比抵抗６０μΩｃｍ以上、降伏伸び１０％以上の加工性と高周波鉄損特性の優れるＦｅ−Ｓｉ−Ｃｒ系合金が開示されている。 Patent Document 3 discloses Fe-Si- having excellent workability and high-frequency iron loss characteristics such as Cr 1.5 to 20%, Si 2.5 to 10%, (C + N) 100 ppm or less, specific resistance 60 μΩcm or more, yield elongation 10% or more. Cr-based alloys are disclosed.
特許文献４には、Ｃｒ１．５〜２０％、Ｓｉ２．５〜１０％、（Ｃ＋Ｎ）０．０１％以下で、さらに（Ｐ＋Ｓ）量をＳｉ及びＣｒ量との関係で規定して、比抵抗６０μΩｃｍ以上、平均結晶粒径５〜１００μｍの加工性と高周波磁気特性の優れる無方向性電磁鋼板が開示されている。 In Patent Document 4, Cr is 1.5 to 20%, Si is 2.5 to 10%, (C + N) is 0.01% or less, and the (P + S) amount is further defined in relation to the Si and Cr amounts, and the specific resistance. Non-oriented electrical steel sheets excellent in workability and high-frequency magnetic properties of 60 μΩcm or more and an average crystal grain size of 5 to 100 μm are disclosed.
特許文献５には、Ｃｒ１．５〜２０％、Ｓｉ２．５〜１０％、Ｃｕ０．０２％以下、（Ｃ＋Ｎ）０．０１％以下、比抵抗６０μΩｃｍ以上の打抜き加工性と高周波磁気特性の優れる無方向性電磁鋼板が開示されている。 In Patent Document 5, Cr 1.5-20%, Si 2.5-10%, Cu 0.02% or less, (C + N) 0.01% or less, punching workability with a specific resistance of 60 μΩcm or more, and excellent high frequency magnetic characteristics A grain-oriented electrical steel sheet is disclosed.
特許文献６には、Ｃｒ０．０１〜２０％、Ｓｉ２．５〜１０％、Ｃｕ０．０２％以下、（Ｃ＋Ｎ）０．０１％以下、平均結晶粒径３００μｍ以下、及び、変形双晶発生率８０％以下の加工変形性に優れるシリコンクロム鋼板が開示されている。 In Patent Document 6, Cr 0.01 to 20%, Si 2.5 to 10%, Cu 0.02% or less, (C + N) 0.01% or less, average crystal grain size 300 μm or less, and deformation twin generation rate 80 A silicon chrome steel sheet having excellent work deformability of not more than% is disclosed.
特許文献７には、Ｃｒ１．５〜２０％、Ｓｉ２．５〜１０％、Ｃｕ０．０２％以下、（Ｔｉ＋Ｎｂ＋Ｖ＋Ｚｒ）１００ｐｐｍ以下、（Ｃ＋Ｎ）５０ｐｐｍ以下、比抵抗６０μΩｃｍ以上の高周波磁気特性と打抜き加工性の優れる無方向性電磁鋼板が開示されている。 Patent Document 7 discloses high frequency magnetic characteristics and punching workability of Cr 1.5 to 20%, Si 2.5 to 10%, Cu 0.02% or less, (Ti + Nb + V + Zr) 100 ppm or less, (C + N) 50 ppm or less, specific resistance 60 μΩcm or more. An excellent non-oriented electrical steel sheet is disclosed.
特許文献８には、長手方向のｒ値が４以上である金属板を円弧状、円状、螺旋状、S字状に板面内曲げ加工する製造方法が開示されている。また、特許文献９には、鋼板表面の主要な結晶方位を規定することによる螺旋加工鋼板の積層部品が開示されている。 Patent Document 8 discloses a manufacturing method in which a metal plate having an r value in the longitudinal direction of 4 or more is bent in the plate surface into an arc shape, a circle shape, a spiral shape, or an S shape. Patent Document 9 discloses a laminated part of a spirally processed steel plate by defining the main crystal orientation on the surface of the steel plate.
しかし、これら開示の技術は、高合金化による高硬質化に対する金型磨耗を軽減する技術であり、抜本的に、生産性を大幅に向上することは望めない。 However, these disclosed techniques are techniques for reducing mold wear due to high hardness due to high alloying, and it is not possible to drastically improve productivity drastically.
また、一体打抜きした鋼板を用いた鉄芯においては、ある特定の方向における優れた特性が鉄芯全体の性能として現れないという問題がある。さらに、抜本的な生産性向上を狙いとした鋼板表面の主要な結晶方位を規定することによる螺旋加工鋼板の積層部品においては、その結晶方位が磁気容易軸ではないため、鉄芯性能に期待が持てないという問題がある。 Moreover, in the iron core using the integrally punched steel sheet, there is a problem that excellent characteristics in a specific direction do not appear as the performance of the entire iron core. Furthermore, in the laminated parts of spirally processed steel sheets by defining the main crystal orientation on the steel sheet surface with the aim of drastically improving productivity, the crystal orientation is not the magnetic easy axis, so iron core performance is expected. There is a problem of not having it.
これに対して、本発明は、鋼板のr値、又は、主要な結晶方位に関係なく、円弧状、円状、螺旋状、S字状に板面内曲げ加工できる鋼板及び鉄芯であり、かつ、鉄芯性能が優れていることが最大の特徴である。 On the other hand, the present invention is a steel plate and an iron core that can be bent in a plate plane into an arc shape, a circular shape, a spiral shape, an S shape, regardless of the r value of the steel plate, or the main crystal orientation, And it is the biggest feature that iron core performance is excellent.
これまで述べてきたように、高合金化による高硬質化の鋼板を用いた鉄芯や、板厚の薄い鋼板を用いた鉄芯は、積層工程における加工性ないし生産性の低下が問題になってきた。 As described above, iron cores using steel plates with high hardness due to high alloying and iron cores using thin steel plates are problematic in terms of workability or productivity reduction in the lamination process. I came.
また、一体打抜きした鋼板を用いた鉄芯においては、ある特定の方向における優れた特性が鉄芯全体の性能として現れないという問題がある。 Moreover, in the iron core using the integrally punched steel sheet, there is a problem that excellent characteristics in a specific direction do not appear as the performance of the entire iron core.
さらに、抜本的な生産性向上を狙いとした鋼板表面の主要な結晶方位を規定することによる螺旋加工鋼板の積層部品においては、その結晶方位が磁気容易軸ではないため、鉄芯性能に期待が持てないという問題がある。 Furthermore, in the laminated parts of spirally processed steel sheets by defining the main crystal orientation on the steel sheet surface with the aim of drastically improving productivity, the crystal orientation is not the magnetic easy axis, so iron core performance is expected. There is a problem of not having it.
本発明は、かかる問題を回避した板面内曲げ加工と磁気特性の優れた鋼板及び鉄芯を提供するものである。 This invention provides the steel plate and iron core which were excellent in the in-plane bending process and the magnetic characteristic which avoided this problem.
本発明の要旨とするところは、以下のとおりである。 The gist of the present invention is as follows.
（１） 磁気特性に優れている鋼板において、ｒ値が０より大きく４より小さく、円弧状、円状、螺旋状、又は、Ｓ字状に板面内曲げ加工できることを特徴とする板面内曲げ加工性と磁気特性の優れた鋼板。 (1) In a plate surface characterized in that, in a steel plate having excellent magnetic properties, the r value is larger than 0 and smaller than 4, and can be bent in a plate shape into an arc shape, a circular shape, a spiral shape, or an S shape. Steel plate with excellent bending workability and magnetic properties.
（２） 前記鋼板が表面処理を施した鋼板であることを特徴とする前記（１）に記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (2) The steel plate excellent in in-plane bending workability and magnetic properties according to (1), wherein the steel plate is a steel plate subjected to surface treatment.
（３） 前記鋼板が、質量％で、Ｓｉ：０．５〜３．５％、Ａｌ：０．００１〜３．５％、Ｃｒ：０．００１〜２．５％を含有し、残部鉄及び不可避的不純物からなることを特徴とする前記（１）又は（２）に記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (3) The steel sheet contains, by mass%, Si: 0.5 to 3.5%, Al: 0.001 to 3.5%, Cr: 0.001 to 2.5%, and the remaining iron and The steel plate excellent in in-plane bending workability and magnetic properties according to the above (1) or (2), characterized by comprising inevitable impurities.
（４） 前記鋼板が、さらに、質量％で、Ｓｎ、Ｃｕの１種又は２種以上を０．００１〜０．２５％含有することを特徴とする前記（３）に記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (4) The in-plane bending according to (3), wherein the steel sheet further contains 0.001 to 0.25% of one or more of Sn and Cu in mass%. Steel sheet with excellent workability and magnetic properties.
（５） 前記鋼板が、さらに、質量％で、Ｔｉ、Ｎｂ、Ｖ、Ｚｒの１種又は２種以上を０．０００５〜０．０１％含有することを特徴とする前記（３）又は（４）に記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (5) The above steel sheet (3) or (4), wherein the steel sheet further contains 0.0005 to 0.01% of one or more of Ti, Nb, V, and Zr by mass%. The steel plate having excellent in-plane bending workability and magnetic properties as described in 1).
（６） 前記磁気特性の鉄損Ｗ10/400が２０．０Ｗ／ｋｇ以下であることを特徴とする前記（１）〜（５）のいずれかに記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (6) The iron loss W10 / 400 of the magnetic properties is 20.0 W / kg or less, and the in-plane bending workability and magnetic properties according to any one of (1) to (5), Excellent steel plate.
（７） 前記鋼板の板厚が０．１〜０．８ｍｍであることを特徴とする前記（１）〜（６）のいずれかに記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (7) The steel plate having excellent in-plane bending workability and magnetic properties according to any one of (1) to (6), wherein the steel plate has a thickness of 0.1 to 0.8 mm. .
（８） 前記板面内加工が、鋼板の有する抗張力の１／３以上１以下で張力を与えながら、かつ、与える張力の１／３以上１以下の面圧を与えながら行う板面内曲げ加工であることを特徴とする前記（１）〜（７）のいずれかに記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (8) In-plane bending process in which the in-plane processing is performed while applying a tension at 1/3 to 1 of the tensile strength of the steel sheet and applying a surface pressure of 1/3 to 1 of the applied tension. The steel sheet excellent in in-plane bending workability and magnetic properties according to any one of the above (1) to (7).
（９） 前記鋼板が、板面内曲げ加工後、歪取焼鈍を施した鋼板であることを特徴とする前記（１）〜（８）のいずれかに記載の板面内曲げ加工性と磁気特性の優れた鋼板。 (9) In-plane bending workability and magnetism according to any one of (1) to (8), wherein the steel plate is a steel plate that has been subjected to strain relief annealing after in-plane bending. Steel sheet with excellent characteristics.
（１０） 前記（１）〜（９）のいずれかに記載の板面内曲げ加工性と磁気特性に優れた鋼板からなることを特徴とする板面内曲げ加工性と磁気特性の優れた鉄芯。 (10) Iron having excellent in-plane bending workability and magnetic properties, comprising a steel plate excellent in in-plane bending workability and magnetic properties according to any one of (1) to (9). core.
本発明によれば、板面内加工性と鉄損特性の優れた鋼板及び鉄芯を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the steel plate and iron core which were excellent in the plate surface workability and the iron loss characteristic can be provided.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明者は、鋼板を用いて鉄芯にする加工方法について、種々の研究を鋭意重ねた結果、板面内曲げ加工性の優れた鋼板及び鉄芯を製造することに成功した。さらに、その鋼板で製造した鉄芯を用い、磁気特性も優れた製品を製造することに成功した。 The present inventor has succeeded in producing a steel plate and an iron core excellent in in-plane bending workability as a result of earnestly conducting various studies on a processing method for making an iron core using a steel plate. Furthermore, we succeeded in producing a product with excellent magnetic properties using an iron core made of the steel plate.
本発明者は、板面内曲げ加工に関して、鋼板のｒ値に着眼した。ｒ値については、これまで、特許文献８に開示されているように、ｒ値が４以上あれば、板面内曲げ加工が可能である。 The inventor has focused on the r value of the steel sheet with respect to the in-plane bending. Regarding the r value, as disclosed in Patent Document 8, if the r value is 4 or more, in-plane bending can be performed.
しかし、本発明者は、ｒ値が４より小さくても０より大きければ、板面内曲げ加工できることを明らかにした。また、本発明者は、板面内曲げ加工性をより改善する成分組成を見いだした。 However, the inventor has clarified that in-plane bending can be performed if the r value is smaller than 4 and larger than 0. The present inventor has also found a component composition that further improves the in-plane bending workability.
まず、鋼板の成分組成を規定する理由について説明する。なお、％は質量％を意味する。 First, the reason for prescribing the component composition of the steel sheet will be described. In addition,% means the mass%.
Ｓｉは、鋼板の固有抵抗を高めて渦電流の発生を抑制して鉄損を低減するが、一方、機械強度を高める元素である。本発明鋼板においては、板面内曲げ加工性を確保するために、上限を３．５％とする。また、鉄損低減のため下限を０．５％とする。 Si is an element that increases the specific resistance of the steel sheet and suppresses the generation of eddy currents to reduce iron loss, while increasing the mechanical strength. In the steel plate of the present invention, the upper limit is set to 3.5% in order to ensure in-plane bending workability. Also, the lower limit is set to 0.5% to reduce iron loss.
Ａｌは、Ｓｉと同様の効果を有する元素である。本発明鋼板においては、板面内曲げ加工性を確保するために、上限を３．５％とする。また、鉄損低減のため下限を０．００１％とする。 Al is an element having the same effect as Si. In the steel plate of the present invention, the upper limit is set to 3.5% in order to ensure in-plane bending workability. In addition, the lower limit is made 0.001% to reduce iron loss.
Ｃｒも、Ｓｉ、Ａｌと同様の効果を有する元素である。本発明鋼板においては、板面内曲げ加工性を確保するために、上限を２．５％とする。また、鉄損低減のため下限を０．００１％とする。 Cr is an element having the same effect as Si and Al. In the steel sheet of the present invention, the upper limit is set to 2.5% in order to ensure in-plane bending workability. In addition, the lower limit is made 0.001% to reduce iron loss.
Ｓｎ、Ｃｕは、ある含有量範囲で板面内曲げ加工性をより改善する効果を有する元素である。０．００１％未満ではその効果が得られず、０．２５％超では偏析影響で板面内曲げ加工性が悪化するので、１種又は２種以上で、０．００１〜０．２５％とする。 Sn and Cu are elements having an effect of further improving the in-plane bending workability within a certain content range. If it is less than 0.001%, the effect cannot be obtained, and if it exceeds 0.25%, the in-plane bending workability deteriorates due to segregation, so one or two or more, 0.001 to 0.25% To do.
Ｔｉ、Ｎｂ、Ｖ、Ｚｒは、板面内曲げ加工性をより改善する効果を有する元素である。この効果の発現を確保するため、下限を１種又は２種以上で０．０００５％とする。一方、過剰の添加は、鉄損特性を劣化させるので、上限を０．０１％以上とする。 Ti, Nb, V, and Zr are elements having an effect of further improving the in-plane bending workability. In order to ensure the expression of this effect, the lower limit is set to 0.0005% for one or more types. On the other hand, excessive addition degrades the iron loss characteristics, so the upper limit is made 0.01% or more.
次に、鋼板の板面内曲げ加工の態様を規定する理由について説明する。 Next, the reason for prescribing the mode of in-plane bending of the steel plate will be described.
鋼板の有する抗張力の１／３以上１以下で張力を与えながら、かつ、与える張力の１／３以上１以下の面圧を与えることにより、板面内曲げ加工がより容易になる。この条件を外れる条件で板面内曲げ加工を行うと、鋼板の内外周に板厚偏差が生じたり、内側に挫屈や皺が生じる可能性がある。本発明者は、この事実を実験的に見いだした。 In-plane bending becomes easier by applying a surface pressure of 1/3 or more and 1 or less of the applied tension while applying tension at 1/3 or more and 1 or less of the tensile strength of the steel sheet. If the in-plane bending process is performed under a condition that does not satisfy this condition, there may be a deviation in thickness on the inner and outer peripheries of the steel sheet, or buckling or wrinkling on the inner side. The present inventor has found this fact experimentally.
次に、本発明鋼板及び該鋼板からなる鉄芯について説明する。 Next, the steel plate of the present invention and the iron core made of the steel plate will be described.
なお、本発明鋼板として用い得る鋼板は、一般の薄板、表面処理鋼板、無方向性電磁鋼板、方向性電磁鋼板のいずれでも構わない。 In addition, any of a general thin plate, a surface-treated steel plate, a non-oriented electrical steel plate, and a directional electrical steel plate may be sufficient as the steel plate which can be used as this invention steel plate.
上記鋼板を、所定の形状に調整後、板面内で円弧状、円状、螺旋状、又は、Ｓ字状に板面内曲げ加工する。図１に、円弧状、円状、螺旋状、及び、Ｓ字状に板面内曲げ加工した実例の一部を示す。 After the steel plate is adjusted to a predetermined shape, the plate surface is bent into an arc shape, a circular shape, a spiral shape, or an S shape within the plate surface. FIG. 1 shows a part of an example in which a plate surface is bent into an arc shape, a circle shape, a spiral shape, and an S shape.
本発明において、板面内曲げ加工された単位鉄芯としては、曲げ加工後に皺の発生がないものであれば構わない。鋼板の板厚変化で言えば４％以下、急峻度で言えば１％以下が望ましい。 In the present invention, any unit iron core that has been subjected to in-plane bending may be any one that does not generate wrinkles after bending. 4% or less is desirable in terms of changes in the thickness of the steel sheet, and 1% or less is desirable in terms of steepness.
また、板面内曲げ加工の後は、必要に応じて、歪取焼鈍を行なう。 Further, after in-plane bending, strain relief annealing is performed as necessary.
以下に、本発明の実施例について説明するが、実施例の条件は、本発明の実施可能性及び効果を確認するために採用した一条件例であり、本発明は、この一条件例に限定されるものではない。本発明は、本発明の要旨を逸脱せず、本発明の目的を達成する限りにおいて、種々の条件及びその組合せを採用し得るものである。 Examples of the present invention will be described below, but the conditions of the examples are one example of conditions adopted for confirming the feasibility and effects of the present invention, and the present invention is limited to these one example of conditions. It is not done. The present invention can employ various conditions and combinations thereof as long as the object of the present invention is achieved without departing from the gist of the present invention.
（実施例１）
０．３５ｍｍ厚、フ−プ幅１０ｍｍで、ｒ値が様々な鋼板を、外径１２０ｍｍφ、内径１００ｍｍφ（外内径比１．２）となるように、各鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら、積層厚７ｍｍに達するまで、螺旋状に加工した。結果を表１に示す。
Example 1
A steel plate having a thickness of 0.35 mm, a width of 10 mm, and various r-values has an outer diameter of 120 mmφ and an inner diameter of 100 mmφ (outer inner diameter ratio of 1.2) at a tension half the tensile strength of each steel plate. Then, while applying a surface pressure of 1/2 of the tension, it was processed into a spiral shape until the thickness reached 7 mm. The results are shown in Table 1.
また、表１には、鋼板の抗張力の１／２の張力にて螺旋状に加工した例を比較例として示す。表１より、ｒ値が４より小さくても０より大きければ、皺発生がなく板面内加工できることがわかる。 Table 1 shows a comparative example in which the steel sheet is processed into a spiral shape with a tension half that of the steel sheet. From Table 1, it can be seen that if the r value is smaller than 4 and larger than 0, there is no generation of wrinkles and the in-plane processing can be performed.
（実施例２）
被膜を有する０．２３ｍｍ厚、フ−プ幅１０ｍｍの方向性電磁鋼板を、外径１２０ｍｍφ、内径１００ｍｍφ（外内径比１．２）となるように、各鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら、積層厚４．６ｍｍに達するまで、螺旋状に加工した。
(Example 2)
A 0.23 mm thick directional electrical steel sheet with a coating width of 10 mm is coated with a tension half that of each steel sheet so that the outer diameter is 120 mmφ and the inner diameter is 100 mmφ (outer inner diameter ratio is 1.2). Then, while applying a surface pressure of 1/2 of the tension, it was processed into a spiral shape until the laminated thickness reached 4.6 mm.
歪取焼鈍後、一次巻線と二次巻線を施して磁気測定に供した。なお、螺旋加工前のＷ17/50は０．８２Ｗ／ｋｇであった。結果を表２に示す。 After the strain relief annealing, the primary winding and the secondary winding were applied for magnetic measurement. In addition, W17 / 50 before the spiral processing was 0.82 W / kg. The results are shown in Table 2.
表２より、被膜を有する方向性電磁鋼板の長手（圧延）方向を板面内加工することができ、かつ、磁気特性も優れていることがわかる。 From Table 2, it can be seen that the longitudinal (rolling) direction of the grain-oriented electrical steel sheet having the coating can be processed in the plate surface, and the magnetic properties are also excellent.
（実施例３）
質量％で、Ｓｉ、Ａｌ、Ｃｒを種々含有し、残部Ｆｅ及び不可避的不純物からなり、フ−プ幅が２０ｍｍの電磁鋼板を、外径１２０ｍｍφ、内径８０ｍｍφになるように、鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら円状に加工し、その後、歪取焼鈍を施した。そして、一次巻線と二次巻線を施して磁気測定に供した。結果を表３に示す。表３より、板面内曲げ加工で、Ｗ10/400が２０．０Ｗ／ｋｇ以下の優れた磁気特性を示す鉄芯が得られていることがわかる。
(Example 3)
A magnetic steel sheet containing various amounts of Si, Al, and Cr, the balance being Fe and unavoidable impurities, and having a hoop width of 20 mm, has an outer diameter of 120 mmφ and an inner diameter of 80 mmφ. The film was processed into a circular shape while applying a surface pressure of 1/2 of the tension at a tension of / 2, and then subjected to strain relief annealing. Then, the primary winding and the secondary winding were provided for magnetic measurement. The results are shown in Table 3. From Table 3, it can be seen that an iron core showing excellent magnetic properties with W10 / 400 of 20.0 W / kg or less is obtained by in-plane bending.
（実施例４）
質量％で、Ｓｉ２．８％、Ａｌ０．５％、Ｃｒ０．０５％を含有し、残部Ｆｅ及び不可避的不純物からなり、フ−プ幅が３０ｍｍの０．３５ｍｍ厚無方向性電磁鋼板を、外径２５０ｍｍφ、内径２２０ｍｍφ、コアバック幅１５ｍｍ、ティ−ス長さ７．５ｍｍ、スロット数２４のモ−タコア形状になるように、鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら円状に加工し、積層して鉄芯とした。
Example 4
A 0.35 mm thick non-oriented electrical steel sheet containing, in mass%, Si 2.8%, Al 0.5%, Cr 0.05%, the balance Fe and unavoidable impurities, and a loop width of 30 mm, A tension of 1/2 of the tensile strength of the steel sheet so that it has a motor core shape with a diameter of 250 mmφ, an inner diameter of 220 mmφ, a core back width of 15 mm, a tooth length of 7.5 mm, and 24 slots. Were processed into a circular shape while applying a surface pressure of, and laminated to form an iron core.
その後、ティ−スに巻線を施して、コアバック部も含めて磁気測定に供した。結果を表４に示す。表４より、質量％でＳｎ、Ｃｕの１種又は２種以上を０．００１〜０．０１％含有する範囲で、鉄損特性が優れていることがわかる。 Thereafter, the teeth were wound and subjected to magnetic measurement including the core back portion. The results are shown in Table 4. From Table 4, it turns out that the iron loss characteristic is excellent in the range which contains 0.001-0.01% of 1 type, or 2 or more types of Sn and Cu by the mass%.
（実施例５）
質量％で、Ｓｉ２．９％、Ａｌ０．４％、Ｃｒ０．０６％を含有し、残部Ｆｅ及び不可避的不純物からなり、フ−プ幅が３０ｍｍの０．１５ｍｍ厚無方向性電磁鋼板を、外径２５０ｍｍφ、内径２２０ｍｍφ、コアバック幅１５ｍｍ、ティ−ス長さ７．５ｍｍ、スロット数２４のモ−タコア形状になるように、鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら円状に加工し、積層して鉄芯とした。
(Example 5)
A 0.15 mm thick non-oriented electrical steel sheet containing, in mass%, Si 2.9%, Al 0.4%, Cr 0.06%, the balance Fe and unavoidable impurities, and a loop width of 30 mm A tension of 1/2 of the tensile strength of the steel sheet so that it has a motor core shape with a diameter of 250 mmφ, an inner diameter of 220 mmφ, a core back width of 15 mm, a tooth length of 7.5 mm, and 24 slots. Were processed into a circular shape while applying a surface pressure of, and laminated to form an iron core.
その後、ティ−スに巻線を施して、コアバック部も含めて磁気測定に供した。結果を表５に示す。表５より、質量％で、Ｔｉ、Ｎｂ、Ｖ、Ｚｒの１種又は２種以上を０．０００５〜０．０１％含有する範囲で、鉄損特性が優れていることがわかる。 Thereafter, the teeth were wound and subjected to magnetic measurement including the core back portion. The results are shown in Table 5. From Table 5, it can be seen that the iron loss characteristics are excellent in the range containing 0.0005 to 0.01% of one or more of Ti, Nb, V, and Zr by mass%.
（実施例６）
質量％で、Ｓｉ２．０％、Ａｌ２．０％、Ｃｒ２．５％を含有し、残部Ｆｅ及び不可避的不純物からなり、フ−プ幅が３０ｍｍの無方向性電磁鋼板を、外径２５０ｍｍφ、内径２２０ｍｍφ、コアバック幅１５ｍｍ、ティ−ス長さ７．５ｍｍ、スロット数２４のモ−タコア形状になるように、鋼板の抗張力の１／２の張力で、その張力の１／２の面圧を付与しながら円状に加工し、積層して鉄芯とした。
(Example 6)
A non-oriented electrical steel sheet containing 2.0% Si, 2.0% Al, 2.5% Cr, the balance Fe and unavoidable impurities, and having a loop width of 30 mm. The surface pressure is ½ of the tensile strength of the steel plate so that it has a motor core shape of 220 mmφ, core back width 15 mm, tooth length 7.5 mm, and 24 slots. While being applied, it was processed into a circular shape and laminated to form an iron core.
その後、ティ−スに巻線を施して、コアバック部も含めて磁気測定に供した。結果を表６に示す。表６より、板厚０．１０〜０．８０ｍｍの範囲で、鉄損特性が優れていることがわかる。 Thereafter, the teeth were wound and subjected to magnetic measurement including the core back portion. The results are shown in Table 6. From Table 6, it can be seen that the iron loss characteristics are excellent in the thickness range of 0.10 to 0.80 mm.
本発明は、前述したように、板面内加工性と鉄損特性の優れた鋼板及び鉄芯を提供するものであから、省エネルギー技術の開発を促進するうえで、工業的効果は甚大である。 As described above, the present invention provides a steel plate and an iron core having excellent in-plane workability and iron loss characteristics, and therefore, the industrial effect is enormous in promoting the development of energy saving technology. .
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