JPH07201551A - Laminated electromagnetic steel plate - Google Patents

Abstract

PURPOSE:To obtain a laminated electromagnetic steel plate excellent in punchability by a method wherein the surface of a steel plate is prescribed in average crystal grain diameter. CONSTITUTION:A laminated electromagnetic steel plate 1 is composed of insulating coatings 2, non-oriented electromagnetic steel plate layers 3, and adhesive insulating layers 4. Provided that the average crystal grain diameter and the number of the laminated steel plate layers 3 are represented by dmum and n respectively, d and n are set so as to satisfy a formula, d>=2Xn. The non- oriented electromagnetic steel plate 3 is 0.08mm to 0.25mm in thickness t., and the Si and Al content of the steel plate 3 amounts to 1% or above by weight. The thickness tRmum of the adhesive insulating layer 4 is determined by a formula, 1<=tR<=100Xt0/m (t0: thickness in mm of a laminated electromagnetic steel plate 1, m: number of adhesive insulating layers 4 contained in the steel plate 1), and m is two or more. Moreover, the thickness t0 of the laminated electromagnetic steel plate 1 is set to 0.35mm to 0.65mm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated electromagnetic steel sheet capable of improving magnetic properties without lowering productivity during iron core production.

[0002]

2. Description of the Related Art In recent years, small high-speed rotating motors such as motors for electric vehicles, small high-efficiency transformers such as fluorescent lamp ballasts for intelligent buildings, and robot control motors are rapidly gaining attention. The iron cores used in these electric devices are compact, highly efficient,
Alternatively, from the viewpoint of improving control accuracy, several hundred Hz or several kHz
Since it is used in the high frequency range of z, it is essential to have excellent high frequency characteristics. Specifically, a sharp increase in iron loss with an increase in frequency becomes a problem, and it is important for the iron core material to have excellent iron loss characteristics in a high frequency range.

Against this background, a technique for reducing the eddy current loss by reducing the thickness of the non-oriented electrical steel sheet to provide a material excellent in high frequency iron loss is disclosed in, for example, Japanese Patent Laid-Open No. 3-2.
It is disclosed in Japanese Patent No. 23445. However, in such a thin non-oriented electrical steel sheet, high-frequency iron loss is effectively reduced, but productivity is reduced during iron core production. That is, in the case of manufacturing an iron core having a certain stacking thickness, when the plate thickness of the steel plate used for the iron core becomes thin, the required number of sheets increases in proportion to this, which inevitably results in an increase in the number of punching steps and the number of stacking steps. I will end up.

In order to avoid such a problem, it is effective for a steel plate manufacturer to preliminarily laminate several thin non-oriented electrical steel plates together with an adhesive insulating layer. Techniques applied to steel sheets are disclosed in, for example, JP-A-59-41808 and JP-A-61-73304.

[0005]

However, when a thin non-oriented electrical steel sheet is actually laminated and integrated with an adhesive insulating layer to form a laminated electrical steel sheet, the above-mentioned problem of reduced productivity is avoided, but punching is performed. Since the properties are extremely deteriorated as compared with the normal material, the life of the punching die is remarkably reduced. This is a problem that cannot be overlooked in manufacturing equipment, but a technology for improving the punchability of laminated electromagnetic steel sheets has not been proposed yet, and this cannot be solved because laminated electromagnetic steel sheets are widely used. Will also be important. The present invention has been made in view of the above circumstances, and an object thereof is to provide a laminated electromagnetic steel sheet having good punchability.

[0006]

The inventors of the present invention have made intensive studies to improve the punching properties of laminated electrical steel sheets, and have come to the following conclusions. (1) In the laminated electromagnetic steel sheet, the punching property is deteriorated because the normal material is a single layer and cracks propagate continuously in the sheet thickness direction during punching, whereas in the laminated electromagnetic steel sheet, cracks are generated. This is because the cracks are likely to be discontinuous when propagating from the non-oriented electrical steel sheet layer to the next non-oriented electrical steel sheet layer.

(2) The crack propagation is likely to be discontinuous between the layers of the non-oriented electrical steel sheet because the crystals existing in the non-oriented electrical steel sheet to which the crack propagates when the cracks try to propagate continuously between the layers. This is because the grain boundaries act as a resistance against propagation and cracks prevent continuous propagation between layers.

(3) Therefore, if the crystal grain boundaries of each layer of the non-oriented electrical steel sheet that becomes the propagation resistance of cracks are reduced, the propagation of cracks tends to be continuous between the layers, and the punchability of the laminated electrical steel sheet is improved. . In that case, the problem is the propagation resistance between the layers, so it is sufficient to reduce the crystal grain boundaries of the surface layer portions of each layer that contribute to this. Regarding the crystal grain boundary in the central part of each layer, crack propagation here is no different from that of a normal single layer material, so no special measures are necessary.

(4) In order to reduce the crystal grain boundaries existing in the surface layer portion of each layer of the non-oriented electrical steel sheet, the grain size of the sheet surface of the non-oriented electrical steel sheet (average measured on the sheet surface of the non-oriented electrical steel sheet) The crystal grain size) may be increased. At that time, the degree is increased in proportion to the increase in the number of laminated layers (the number of non-oriented electrical steel sheets included in the laminated electrical steel sheet) and the number of layer boundaries in which continuity of crack propagation becomes a problem. There is a need.

The present invention has been made on the basis of the above findings, and is a laminated type electromagnetic steel sheet in which non-oriented electrical steel sheets are laminated and integrated with an adhesive insulating layer, and the average crystal grain size d of the steel sheet surface. (Μm) is d ≧ 20 × n (n: the number of laminated layers = the number of non-oriented electrical steel sheets included in the laminated electrical steel sheet).

Further, in addition to the laminated type electromagnetic steel sheet,
It has an insulating film on the surface, the thickness t _S of the non-oriented electrical steel sheet is 0.08 mm or more and 0.25 mm or less, and the sum of the amounts of Si and Al in the steel sheet is 1% or more and 4% or less by weight%. And the thickness t _R (μm) of the laminated insulating layer is 1 ≦ t _R ≦ 100.
× t _O / m (t _O : total thickness (mm) of laminated electromagnetic steel sheet, m: number of layers of adhesive insulating layers included in laminated electromagnetic steel sheet), and the number n of laminated layers is 2 or more. The present invention provides a laminated electromagnetic steel sheet characterized by the addition of the above.

Further, in comparison with the above laminated electromagnetic steel sheet, the total thickness t _O of the laminated electromagnetic steel sheet is 0.35 mm or more and 0.65 or more.
It is intended to provide a laminated electromagnetic steel sheet characterized in that the thickness is less than or equal to mm.

Furthermore, in any one of the above-mentioned laminated type electromagnetic steel sheets, the non-oriented electrical steel sheet is C:% by weight.
0.005% or less, Si + Al: 1 to 4%, Mn: 0.
1 to 1.5%, P: 0.15% or less, S: 0.015%
The present invention is to provide a laminated electromagnetic steel sheet characterized by comprising N: 0.005% or less and the balance Fe and unavoidable impurities.

[0014]

Before describing the present invention in detail, the layer structure of the laminated electromagnetic steel sheet according to the present invention will be described. FIG. 1 schematically shows an example in which the number of laminated layers (the number of non-oriented electrical steel sheets included in the laminated electrical steel sheet) is three, where 1 is the entire laminated electrical steel sheet. This is composed of 2 insulating films, 3 non-oriented electrode steel plate layers and 4 adhesive insulating layers. Next, the reasons and effects of the present invention will be described.

In the present invention, in order to improve the punching property, d ≧ 2 when the average plate surface grain diameter d (μm) of the non-oriented electrical steel sheet constituting the laminated electrical steel sheet is the number of layers n.
It should be 0 × n, but this is based on the following examination results. First, with respect to the total thickness, the number of laminated layers and the composition and thickness of the non-oriented electrical steel sheet layer, and the composition and thickness of the adhesive insulating layer, the laminated electromagnetic steel sheet is produced in various combinations, and in each laminated electromagnetic steel sheet, , The grain size of the non-oriented electrical steel sheet layer was widely changed.

Next, as a comparison, an ordinary single-layer material having the same plate thickness, steel composition, and plate surface grain size as those of these laminated electromagnetic steel sheets was prepared, and both were subjected to a continuous punching test to obtain punchability. The effect of grain size of the non-oriented electrical steel sheet layer was investigated.

The composition of the non-oriented electrical steel sheet layer used at that time is shown in Table 1, and the actual construction of the laminated electrical steel sheet and the evaluation results of punchability are shown in FIGS. Here, the punchability was evaluated by the ratio of the die life of the laminated electromagnetic steel sheet to the die life of a normal material having the same plate thickness, steel composition, and plate surface grain size. Specifically, the rotor having an outer diameter of 50 mm and the stator having an outer diameter of 80 mm were continuously punched, and when the burr height exceeded 30 μm, the mold life was determined, and the above ratio was determined.

Both the laminated type electromagnetic steel sheet and the ordinary single layer material are coated with an inorganic-organic insulating film having a thickness of 1 μm and subjected to a punching test. From FIGS. 2 to 5, punching of the laminated electromagnetic steel sheet is performed regardless of the total thickness of the laminated electromagnetic steel sheet, the number of laminated layers, the component and thickness of the non-oriented electrical steel sheet layer, the component of the adhesive insulating layer, the film thickness, and the like. It can be seen that the property (ratio of die life of laminated electromagnetic steel sheet to die life of ordinary material) depends on the grain size of the non-oriented electrical steel sheet layer. And, although the value of punchability itself differs depending on the number of layers,
It can be seen that the punching property is sharply improved when d / n ≧ 20 regardless of the number of stacked layers. That is, as described above, it was confirmed that the punching property, that is, the mold life was remarkably improved by appropriately controlling the plate surface grain diameter in relation to the number of stacked layers. Therefore, in the present invention, based on such experimental results, the plate surface grain size d (μ
m) was defined as d ≧ 20 × n in relation to the number of stacked layers n. Here, the punchability is improved by defining in this way that the surface layer that acts as a resistance against the propagation of cracks between layers when the plate surface grain size is increased according to the number of stacked layers as described above. It is considered that this is because the number of grain boundaries is reduced, which increases the continuity of crack propagation between layers.

It is necessary that the number of laminated layers is 2 or more in order to be a laminated electromagnetic steel sheet. Also,
As shown in FIGS. 2 to 5, the punchability value itself naturally decreases as the number of layers increases, but the punchability sharply improves at d / n ≧ 20 regardless of the number of layers.
It is not necessary to specify the upper limit of the number of stacked layers. However, if the number of layers is up to 5, 70% of the normal material is used when d / n ≧ 20.
A high die life of 100% (that is, punchability) can be obtained.

Further, in the present invention, it is important to secure punching property, and for that purpose, it is preferable to have an insulating film on the surface. In that case, as long as an insulating film is provided on the surface, the punching property is markedly improved as compared with the case where the insulating film is not provided. Therefore, the type and film thickness of the film are not particularly limited. However, from the viewpoint of further improving the punchability, an inorganic-organic type or an organic type is preferable to an inorganic type, while the film thickness of the laminated electromagnetic steel sheet is the iron core. From the viewpoint of ensuring the insulation resistance between the steel plates when assembled, it is preferably 0.3 μm or more.

From the viewpoint of improving the punchability of the laminated electromagnetic steel sheet, it is most important to optimize the grain size of the non-oriented electrical steel sheet layer as described above, and further, an insulating coating is applied to the surface. However, considering other characteristics, it is preferable to further set the following conditions.

First, the thickness of the non-oriented electrical steel sheet layer is preferably 0.08 mm or more and 0.25 mm or less. As will be described later again, as a method of manufacturing a laminated electromagnetic steel sheet, it is general to prepare a non-oriented electrical steel sheet having a predetermined thickness or a thickness close to the predetermined thickness, and laminate and integrate this with an adhesive insulating layer. However, in that case, when the thickness of the non-oriented electrical steel sheet layer is less than 0.08 mm, when the non-oriented electrical steel sheet used as a raw material is manufactured, a significant increase in the mill load in cold rolling and the steel sheet Not suitable as it may cause breakage. On the other hand, when the plate thickness exceeds 0.25 mm, the high frequency iron loss of the non-oriented electrical steel sheet layer sharply increases due to the increase of the eddy current loss, and as a result, the iron loss of the whole laminated electromagnetic steel sheet also sharply increases. This is not desirable.

For the same reason, the S of the non-oriented electrical steel sheet layer is
It is preferable to optimize the sum of the amounts of i and Al. That is, in the non-oriented electrical steel sheet, the influence of Si and Al is dominant in the deformation resistance and the iron loss, and in addition, the degree of the influence of both is about the same. It is preferable that the sum of both is set to an appropriate value. Specifically, S
If the sum of the amounts of i and Al is less than 1% by weight, the eddy current loss increases due to the decrease in specific resistance, and the high-frequency iron loss of the non-oriented electrical steel sheet layer rapidly increases. On the other hand, when the sum of the amounts of Si and Al exceeds 4%, when the non-oriented electrical steel sheet used as the raw material is cold-rolled, there is a risk of an increase in mill load, a risk of breakage, and the like. Therefore, the amount of Si + Al is preferably 1 to 4% by weight.

From the viewpoint of further improving manufacturing stability and characteristics, it is preferable that the components other than Si and Al are defined as follows. C: 0.0 from the viewpoint of preventing magnetic aging and further reducing iron loss
It is preferably not more than 05% by weight.

Mn: 0.1% by weight from the viewpoint of improving hot ductility
The above additions are required, and the addition of Mn further reduces the iron loss. However, if the addition amount exceeds 1.5% by weight, the effect on hot ductility is saturated and the magnetic flux density decreases. To do. Therefore, 0.1 to 1.5% by weight is preferable.

P: In order to improve the punchability of the non-oriented electrical steel sheet layer itself by increasing the hardness and to further reduce the iron loss, it may be added up to 0.15 wt% if necessary. However, if the addition amount exceeds 0.15% by weight, the effect on the punchability is saturated.

S: MnS and other sulfides are formed to deteriorate the magnetic properties, so the content is preferably 0.015% by weight or less. N: From the viewpoint of further reducing iron loss, it is preferably 0.005% by weight or less.

Next, regarding the adhesive insulating layer, it is sufficient that the adhesive strength is such that peeling does not occur at the time of punching the iron core, and regarding the insulation resistance between layers, it is sufficient to show general insulating properties. Further, since the influence of the adhesive insulating layer on the punching property is small as described above, it is not necessary to specify the component composition and thickness of the adhesive insulating layer. That is, as the adhesive insulating layer, even if it is an organic type composed of epoxy resin, phenol resin, polyamide resin, acrylic resin, etc., an alkali represented by colloidal silica, phosphate, sodium silicate or potassium silicate. It may be an inorganic type such as metal silicate or the like, or an inorganic-organic type in which both are mixed.

The thickness of the adhesive insulating layer is not particularly limited in terms of adhesive strength, insulation resistance, or punchability as described above, but the surface roughness of the non-oriented electrical steel sheet layers above and below is usually Is 0.2 to 0.3 μm or more,
Considering this and the uniformity of thickness and the manufacturing stability, the thickness is practically 1 μm or more. Further, if the thickness is 1 μm or more, it is sufficient in terms of adhesive strength or insulation resistance between layers.

On the other hand, when the thickness of the adhesive insulating layer is increased, the space factor of the laminated electromagnetic steel sheet (the ratio of the total thickness of the non-oriented electrical steel sheet layer to the entire laminated electromagnetic steel sheet) is decreased, and the magnetic characteristics are reduced. Not preferable. 90% or more is desirable as the space factor,
Considering this point, the thickness of the adhesive insulating layer is 100 × t _O
/ M ([mu] m) (provided that, t _O: total thickness of the laminated electromagnetic steel plates (mm), m: number of adherent insulating layer) is preferably set to.

Regarding the total thickness of the laminated electromagnetic steel sheet,
As mentioned above, the punchability (die life) is not affected in terms of the ratio with the ordinary single-layer material, and in addition, since the interlayer insulation is applied between the non-oriented electrical steel sheet layers, the magnetic properties It does not affect the characteristics. Therefore, in the present invention, the plate thickness of the laminated electromagnetic steel plate does not need to be specified particularly, and the present invention can be applied regardless of the plate thickness. However, from the point of reducing the punching man-hours and the stacking assembling man-hours by laminating thin electromagnetic steel plates, the lower limit of the thickness of laminated electromagnetic steel plates is the non-directionality that is generally used. It is suitable to set the lower limit of the thickness of the electromagnetic steel sheet to 0.35 mm. Similarly, when the upper limit of the thickness of the non-oriented electrical steel sheet used for general purpose is more than 0.65 mm, there arises a problem that a new dedicated punching die needs to be produced. 0.65 mm is suitable as the upper limit of the thickness of the electromagnetic steel sheet.

As the non-oriented electrical steel sheet layer constituting the laminated electromagnetic steel sheet, it is usual to use the same components, thicknesses, grain sizes, etc., but these are within the scope of the present invention. As long as the non-oriented electrical steel sheet layers having different components, thicknesses, grain sizes, etc. are combined to form a laminated electrical steel sheet. Similarly, the component composition and thickness of the adhesive insulating layer are usually the same, but it is not excluded that these are changed to form a laminated electromagnetic steel sheet.

Next, a method of manufacturing the laminated electromagnetic steel sheet of the present invention will be described. In the present invention, there is no particular limitation on the manufacturing method as long as the laminated electromagnetic steel sheet as described above is obtained, but considering the manufacturing stability and economy, the method described below is suitable. is there.

(1) Non-oriented electrical steel sheets cold-rolled to near a predetermined thickness and adhesive insulating layers are alternately laminated, and these are rolled and integrated by cold light reduction rolling, followed by finish annealing and insulation coating. Method of coating and baking.

(2) A method in which non-oriented electrical steel sheets cold-rolled to a predetermined thickness and adhesive insulating layers are alternately laminated, and these are integrated by roll forming, followed by finish annealing, insulating film coating and baking.

(3) Non-oriented electrical steel sheets which have been cold-rolled to a predetermined thickness and have undergone finish annealing and adhesive insulating layers are alternately laminated, and these are integrated by roll forming, followed by applying an insulating film and baking. How to do.

(4) In the above method (3), strain relief annealing is performed after roll forming, or after insulating film coating and baking.

[0038]

[Examples] Using the steels A to P described in Tables 1 and 2, a non-oriented electrical steel sheet annealed sheet having a predetermined thickness was prepared,
This and adhesive insulating layers were alternately laminated and integrated by roll forming, followed by applying an insulating film and baking to obtain laminated electromagnetic steel sheets as shown in Tables 3 and 4.

At that time, in the production of the non-oriented electrical steel sheet annealed plate, the grain size of the sheet surface was variously changed by changing the finish annealing temperature. Regarding the insulation film,
An inorganic-organic material was applied so as to have a film thickness of 1 μm. Subsequently, the magnetic properties and punchability of these laminated electromagnetic steel sheets were evaluated.

Regarding the magnetic characteristics, a ring-shaped sample having an inner diameter of 60 mm and an outer diameter of 80 mm was used. Since high frequency characteristics are important, magnetic flux density B ₁₀ and iron loss W at a frequency of 400 Hz were used.
_10/400 was measured. In calculating the iron loss, most of the weight of the laminated electromagnetic steel sheet is derived from the non-oriented electrical steel sheet layer, so the measured loss value is divided by the total weight of the laminated electromagnetic steel sheet. I asked for it. On the other hand, the magnetic flux density was calculated by actually measuring the cross-sectional area of the laminated electromagnetic steel sheet including the adhesive insulating layer and dividing the magnetic flux amount by this from the practical viewpoint.

Regarding the punching property, a normal single-layer non-oriented electrical steel sheet having the same plate thickness, the same steel composition and the same grain size as the laminated type electromagnetic steel sheet was prepared, and an inorganic-organic insulating film was also formed on the surface. Was coated to a film thickness of 1 μm, and this and the laminated electromagnetic steel sheet were punched under the same conditions, and the punching die life ratio at that time was evaluated. That is, for a laminated electromagnetic steel sheet and an ordinary single layer material, a rotor with an outer diameter of 50 mm and an outer diameter of 80 m
Continuously punching out the stator of m, the burr height is 30μ
The mold life was defined as the cumulative number of punches when m was exceeded, and the ratio of the two mold lives was calculated. Tables 3 and 4 show the magnetic properties of the laminated steel sheet thus obtained and the punching die life ratio with respect to the ordinary material.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

[Table 3]

[0045]

[Table 4]

As is clear from the table, the value of d / n is 2
If 0 or more, that is, d ≧ 20 × n, the die life ratio (that is, punching property) is remarkably excellent as compared with the case where the value of d / n is less than 20, that is, d <20 × n. It was confirmed that Furthermore, the plate thickness t _S of the non-oriented electrical steel sheet is 0.08 mm or more and 0.25 mm or less, and the sum of the amounts of Si and Al in the steel sheet is 1% or more and 4% or less in terms of weight%. Has a thickness t _R (μm) of 1 ≦ t _R ≦ 1
It was confirmed that if it is 00 × t _O / m, excellent magnetic flux density and iron loss can be obtained in addition to punchability. Further, it was confirmed that if the number of stacked layers n is 5 or less, the punching die life of 70% or more of the normal material is secured.

On the other hand, those which do not satisfy the above conditions have a punching die life of 60% or less and an iron loss of 2%.
It was confirmed that the magnetic flux density was 1 w / kg or more, which was excessive, or the magnetic flux density and iron loss were poor, and the balance between the two was poor.

[0048]

As described above, according to the present invention,
It is possible to obtain a laminated electromagnetic steel sheet excellent in punching property without causing a decrease in productivity such as an increase in the number of punching steps and the number of stacking and assembling steps when manufacturing an iron core, and its industrial value is extremely high.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a layer structure of a laminated electromagnetic steel sheet according to the present invention.

FIG. 2 is a diagram showing the relationship between the punching die life of a laminated electromagnetic steel sheet and the plate surface grain size of a non-oriented electrical steel sheet layer when the number of laminated sheets is two.

FIG. 3 is a diagram showing the relationship between the punching die life of a laminated electromagnetic steel sheet and the plate surface grain size of a non-oriented electrical steel sheet layer when the number of laminated sheets is three.

FIG. 4 is a diagram showing a relationship between a punching die life of a laminated electromagnetic steel sheet and a sheet surface grain size of a non-oriented electrical steel sheet layer when the number of laminated sheets is five.

FIG. 5 is a diagram showing a relationship between a punching die life of a laminated electromagnetic steel sheet and a plate surface grain size of a non-oriented electrical steel sheet layer when the number of laminated sheets is six.

[Explanation of symbols]

1 ... Laminated electromagnetic steel sheet, 2 ... Insulating film, 3 ... Non-oriented electrical steel sheet layer, 4 ... Adhesive insulating layer.

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[Procedure amendment]

[Submission date] March 29, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction content]

[0044]

[Table 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (4)

[Claims] 1. A laminated electromagnetic steel sheet in which non-oriented electrical steel sheets are laminated and integrated with an adhesive insulating layer, and the average crystal grain diameter d (μm) of the steel sheet surface is d ≧ 20 × n (n: The number of laminated layers = the number of non-oriented electrical steel sheets included in the laminated electrical steel sheets). 2. A non-oriented electrical steel sheet having an insulating coating on its surface, a thickness t _S of 0.08 mm or more and 0.25 mm or less, and a sum of Si and Al in the steel sheet is 1% by weight. % Or more and 4% or less, and the thickness t _R (μm) of the laminated insulating layer is 1 ≦.
t _R ≦ 100 × t _O / m (t _O : total thickness (mm) of laminated electromagnetic steel sheet, m: number of layers of adhesive insulating layer included in laminated electromagnetic steel sheet), and the number of laminated layers n is 2 The laminated electromagnetic steel sheet according to claim 1, wherein the laminated electromagnetic steel sheet is one or more sheets. 3. The total thickness t _O of the laminated type electromagnetic steel sheet is 0.3.
It is 5 mm or more and 0.65 mm or less, The laminated electromagnetic steel sheet according to claim 2. 4. The non-oriented electrical steel sheet, in% by weight,
C: 0.005% or less, Si + Al: 1-4%, Mn:
0.1 to 1.5%, P: 0.15% or less, S: 0.01
5% or less, N: 0.005% or less, and the balance consists essentially of Fe and unavoidable impurities, The laminated type electromagnetic steel sheet of any one of Claim 2 or 3 characterized by the above-mentioned.