TW555863B - Nonoriented electromagnetic steel sheet and method for producing the same - Google Patents

Abstract

A nonoriented electromagnetic steel sheet for the use as iron core of electrical machines is provided, in which it has the following chemical composition, in mass %: C: 0 to 0.010%, Si and/or Al: 0.03 to 0.5 or more than 0.5% and not more than 2.5%, Mn: 0.5% or less, P: 0.10% to 0.26%, S: 0.015% or less, N: 0.010% or less and balance: Fe and inevitable impurities, and its average crystallite is larger than 30 mum and smaller than 80 mum. The nonoriented electromagnetic steel sheet exhibits excellent dimensional precision in blanking, and further, exhibits excellent magnetic balance of high magnetic flux density-low iron loss in a low Si steel, and excellent high magnetic flux density-high strength balance in a middle to high Si steel.

Description

555863 Α7 Β7 V. Description of the Invention (j) [Technical Field] (Please read the precautions on the back before filling out this page) The present invention relates to non-oriented electromagnetic steel sheets used as core materials for electrical equipment. Among them, the non-directionality of the iron core material of the DC brushless motor, which is embedded in a magnet-type DC motor, which is required to have high-level punching dimensional accuracy and local lift, is required. Electromagnetic steel plate and manufacturing method thereof. (Background Art) A non-oriented electromagnetic steel sheet is a soft magnetic material mainly used as a core material for electric machines such as motors and transformers. In order to improve efficiency or miniaturization of these electronic machines, the electromagnetic steel is required to have low iron loss and high magnetic flux density. In the field of electric motors, the magnetic characteristics of the electromagnetic steel sheet of the core material are also being improved. In other words, the requirements and improvements of low iron loss and high magnetic flux density are being improved. In addition, the motor itself has been rapidly out of sync with the past. Type AC induction motor is replaced with a more efficient synchronous motor, or with high characteristics. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, the synchronous motors are usually classified into: surface-magnet type (S PM) and embedded magnet-type (IP Μ) brushless PC motors; Reactance motor with reactance torsion generated by polarity. The reactance motor is based on the shape of the rotor and stator, the gap between the rotor and stator, and the magnetic flux density of the material (green material). Therefore, when used as a core material for a reactance motor, it is required to have a higher magnetic flux density when compared with other motors, and the paper size when punching (blanking) applies the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) -4- 555863 A7 B7 V. Description of the invention (2) High-precision dimensional accuracy is an important matter. (Please read the precautions on the back before filling in this page.) Furthermore, with the development of inverters, in order to improve the efficiency and torque of motors, the number of poles tends to increase at the same time as high-speed rotation. These are the factors that must increase the operating frequency. Therefore, the non-directional electromagnetic steel sheet for motor materials is not only required to improve the magnetic characteristics at the commercial frequency (50 ~ 6 0 Η z) required in the past. It is also necessary to improve the magnetic characteristics in the high frequency range above 40,000. Various efforts have been made so far to improve the magnetic flux density and iron loss of the aforementioned non-oriented electromagnetic steel sheet. In order to reduce the iron loss of non-oriented electrical steel sheets, a method of increasing the S i content is generally adopted. For example, the highest-grade non-oriented electromagnetic steel sheet is sometimes added with Si of about 3.5 m a s s%. However, as the Si content increases, although the iron loss will decrease, the magnetic flux density will decrease at the same time. On the other hand, when a non-oriented electrical steel sheet of a low grade is used, since the S i content is suppressed, a relatively high magnetic flux density can be obtained, but there is a problem of high iron loss. The consumption cooperation of employees of the Intellectual Property Bureau of the Ministry of Economic Affairs as a method to improve the iron loss of such low S i steel is disclosed in Japanese Patent Gazette No. 6 2-2 6 7 4 2 1, which is to make the amount of S i In non-oriented electrical steel sheets with an A1 content of 0.15 to 0. 60 mass%, the amount of impurities (impurities) such as c, S, N, and 〇 is limited so as to be an obstacle. The reason for the growth of crystal grains is the reduction of the intervening substances and the harmlessness, and the technology to promote the growth of grains and achieve low iron loss. However, the particle growth of this low Si steel will be accompanied by strong growth. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -5- 555863 A7 B7 5. The description of the invention (3) is reduced, so The problem is that the punching surface is uneven or the springback becomes large during punching processing, and there is a problem that the punching property is significantly reduced. (Please read the precautions on the back before filling in this page.) Regarding the method of adjusting the hardness of low Si steel to improve the punchability, there are: 〇 · 〇8 ～ 0 _ 1 mass% of p technology, such as In this patent publication, Japanese Patent Application Laid-Open No. 5 6-13 0 4 2 5 discloses a technique for adding P less than 0.2 mass% in order to improve the punchability. It also refers to the active addition of low Si steel. The technology of P is disclosed in the Japanese Patent Gazette. The amount of S i is suppressed to 0.1 mass:% or less, and A 1 is added to the steel containing A 1 in a range of 0.1 to 1 · Oma ss%, and 0 is added. · 1 ~ 0 · 25mass% of P, a method to improve the magnetic properties by the combined effect of A1 and P. However, in these technologies, the improvement of the punching property by adding P is only focused on the hardness For the purpose of adjusting and suppressing the irregularity of the steel plate, there is no consideration for the dimensional accuracy after punching. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. , And the view of miniaturization is required for its cutting precision and high magnetic flux density In addition, in order to withstand the high-speed rotation of the motor or prevent the embedded magnet from detaching, it is necessary to maintain the strength of the electromagnetic steel plate at a high level. As mentioned above, from the viewpoint of strength, high-grade Si steel is advantageous. However, from the viewpoint of magnetic flux density, it is ideal to have a low Si, and it has been difficult to achieve a balance between strength and magnetic flux density in the past. (Disclosure of the invention) This paper size applies the Chinese National Standard (CNS) A4 specification (210X297) (%) -6- 555863 A7 ____ B7 V. Description of the invention (4) (Questions to be solved by the present invention) (Please read the precautions on the back before filling this page) As mentioned above, it is the height of non-oriented electromagnetic steel plate The magnetic flux density and low iron loss characteristics are common characteristics required for all uses of non-directional electromagnetic steel plates for various motors, transformers, etc., but among them are non-directional electromagnetic steel plate materials for reactive motors. The particularly high magnetic flux density and high dimensional accuracy are even more important in terms of its operation principle. However, it has not been found so far. It has excellent magnetic characteristics with high magnetic flux density and low iron loss. It also has excellent die-cutting properties, especially non-directional electromagnetic steel sheets with excellent dimensional accuracy at the time of die-cutting. In addition, these characteristics are even better than required strengths such as embedded DC brushless motors. The non-oriented electromagnetic steel sheet that can meet the above requirements has not yet been found. Furthermore, in addition to the above-mentioned magnetic characteristics and punching properties, consideration is given to both high-speed rotation and multi-polarization of motors in recent years. The high frequency of non-directional electromagnetic steel sheet is still in the pursuit. The Ministry of Economic Affairs, Intellectual Property Bureau, (printed by the Industrial and Consumer Cooperatives) The present invention was developed in view of the above situation, and proposes an iron for motors or transformers. The core material, especially as an iron core material that is required to have a particularly high magnetic flux density and high dimensional accuracy, such as a reactance motor, is the most suitable magnetic balance with unprecedented high magnetic flux density and low iron loss. And non-oriented electromagnetic steel sheet with excellent punching dimensional accuracy, and high precision magnetic flux density and high rotor The high-strength electromagnetic steel sheet, which is important from the viewpoints of fast rotation and prevention of scattering of the embedded magnet, and the remaining manufacturing method are aimed at. Furthermore, for the sake of convenience, hereafter, the sum of Si and A 1 is used as the paper standard to apply the Chinese National Standard (CNS) A4 specification (210X297 mm) 555863 Α7 B7 5. Description of the invention (5) 〇 · 〇 3ma ss% or more, 0.5ma ss% or less is referred to as low Si steel; the sum of Si and A1 exceeds 0.5inass% or more is referred to as medium to high Si steel. (Means to Solve the Problem) Therefore, the inventors have deliberately researched in order to achieve the above purpose, and found that the amount of S i or A 1 is reduced to a low S i steel level, and the steel is essentially a steel with a high saturation magnetic flux density. , And adjust the average crystal grain size to a specified range, while adding a proper amount of P, not only can obtain high magnetic flux density, and excellent magnetic characteristics of low iron loss, and punching dimensional accuracy can be significant Improved knowledge and insights. At the same time, it was obtained that S i and A 1 were controlled to a total of 0.05 mass% to about 2.5 mass%, and an appropriate amount of P was added to the process to achieve the effect of improving the dimensional accuracy of punching. In addition, under the condition of maintaining the magnetic flux density, the strength can be greatly increased, and the knowledge and insights of the magnetic-intensity balance that have never been achieved before can be achieved. The gist of the present invention is described in detail as follows: Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1. A non-directional electromagnetic steel sheet with excellent magnetic properties and punching accuracy, characterized by: In this case, C: 〇 ~ 〇_ 0 1 ％; At least one of Si and A 1 (si and / or A 1) in total is 0.03% or more, 0.5% or less; M η: 〇 Less than 5%; This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297mm) -8-555863 A7 _ B7 V. Description of the invention (6) P: 0.10% or more, 0.26% or less; S: 0. 0 15% or less; (Please read the precautions on the back before filling in this page) N: 0 _ 〇1 〇% or less; the rest is composed of Fe and unavoidable impurities (impurities) And the average crystal grain size is 30 μm or more and 80 μm or less. 2 · The non-oriented electrical steel sheet according to the above item 1, wherein the steel sheet further contains at least one of Sb and Sn (Sb and / or Sn). When the content is converted by mass percentage, the total is 0.4% or less . 3. The non-oriented electromagnetic steel sheet having excellent magnetic characteristics and punching accuracy as described in 1 or 2 above, wherein the steel sheet further contains: Ni, and its content is 2.3% or less when converted by mass percentage. 4. The non-oriented electromagnetic steel sheet having excellent magnetic characteristics and punching accuracy as described in the above 1, 2, or 3, wherein the thickness of the steel sheet is 0.35 mm or less as its characteristic. 5 · —A non-directional electromagnetic steel sheet with excellent magnetic properties and punching accuracy, characterized by: Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs: When converted by mass percentage, it includes: c: 0 ~ 0.010%;

At least one of Si and A1 (Si and / or A1), a total of 0.5% or more and 2.5% or less; M η: 0.5% or less; P: 0.1% or more and 0.26% or less; S : 〇15% or less; and this paper size applies Chinese National Standard (CNS) A4 specification (210X297mm) -9-555863 Α7 Β7 5. Description of the invention (7) N: 0 · 0 1 0% or less; and Contains Ni as required: 2.3% or less; the rest are composed of Fe and unavoidable impurities, and at least meet them; $? 4 and 1 ^ $ 〇.2 6 is one of the relations, and

Pa = -0.2 Si + 〇. 12Mn-〇. 32A1 + 〇.〇5Ni2 + 〇.10Ni + 〇.36 "· (1)

Pf = — 〇 · 34Si + 0.20Mπ ~ .54A1 + 〇.24Ni2 + 〇.28Ni + 〇.76 "(2) Here, the unit of the content of each element is mass percentage. 6. It is excellent in the above 5 The non-oriented electromagnetic steel sheet with high strength, magnetic characteristics, and punching accuracy, wherein the steel sheet further contains: at least one of S b and S η. When the content is converted by mass percentage, the total is 0.4% or less. In addition, the above-mentioned steel types are contained as secondary elements and at least one of the following elements. When the element is converted by mass percentage, it is C a: 〇 · 〇 1% or less; Β: 0 · 005% or less; C r: 0.1% or less; Cu: 〇 · 1% or less; Μ 〇: 〇 · 1% or less; 7.. Non-directionality with excellent magnetic characteristics and punching accuracy The manufacturing method of electromagnetic steel plate is characterized by: This paper size is applicable to Chinese National Standard (CNS) Α4 specification (210 × 297 mm) Material I ------------ (Please read the precautions on the back before (Fill in this page), 11 Printed by the 8th Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -10- 555863 A7 _ _______B7 V. Description of the invention (8) Regarding the steel sheet (steel flat block) for thin plates with the composition described in any one of 1 to 3 above, (please read the precautions on the back before filling this page). It is heating The temperature fii is in the single-phase area of Vosstian Iron, and the coiling temperature of the steel strip coil is lower than 6 50. (: The hot rolling treatment is performed under the following conditions, and then the descaling treatment is performed continuously.丨 or two or more cold-rolling treatments including intermediate annealing treatments, and then perform final refining annealing treatment in a single-phase area of ferrous iron with more than 7000t or more. A method for manufacturing a non-oriented electromagnetic steel sheet with magnetic characteristics and punching accuracy, which is characterized in that the steel sheet (steel flat block) for a thin plate having a composition as described in any one of the above 1 to 4 is heated The temperature is within the single-phase area of Vosstian Iron and the coiling temperature of the steel strip coil is below 6 50 ° C. After hot rolling treatment, if Ni is not added or the Ni content is lower than 1.0 Intellectual Property Bureau of the Ministry of Quality and Economics In the case of the percentage printed by the company, the hot-rolled steel sheet is annealed in the single-phase area of ferrous iron above 900 t, or in the single-phase area of Vostian Iron above A c 3; In the case where the content of Ni is more than 1.0% by mass and less than 2.3% by mass, the hot-rolled steel sheet is annealed in the single-phase area of Vostian Iron, which is above A c 3; After descaling, cold rolling is performed once or twice or more, including intermediate annealing, and then the final refined annealing is performed in a single-phase region of ferrous iron having a temperature of more than 700 ° C. The size of this paper is applicable. China National Standard (CNS) A4 specification (210X297 mm) -11-555863 A7 ___ B7 V. Description of invention (9) Disposal. (Please read the precautions on the back before filling out this page) 9. A method for manufacturing non-oriented electromagnetic steel sheet with excellent strength, magnetic properties and punching accuracy, characterized by: 5 ~ 6 as above The steel sheet for steel sheet (steel shoulder block) according to any one of the above-mentioned components has a heating temperature of 100 to 120 ° C, and a coiling temperature of the steel strip coil is lower than 6 50 ° C. After the hot rolling treatment is performed under the following conditions, the hot-rolled steel sheet is annealed if necessary. Next, after the descaling treatment is performed, the cold rolling treatment is performed once or twice or more, including the intermediate annealing treatment. For the final refining annealing. Furthermore, in the method for manufacturing an electromagnetic steel sheet according to the above 9, the annealing process may be applied to the hot-rolled sheet after hot rolling. Furthermore, in the method for manufacturing an electromagnetic steel sheet according to any one of 7, 8, or 9, the treatment for imparting an insulating film after the final refining annealing treatment may be performed. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (the best form of implementing the invention) The experimental results leading to the present invention will be described below. In addition, the% expressions of the component compositions shown below are all ^ ma s s% "(converted by mass percentage). [Experiment 1] This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -12- 555863 A7 _B7 V. Description of the invention (10) First, to understand the steel composition and punching size of non-oriented electromagnetic steel plate The relationship between accuracy is melted in the laboratory .: C: 〇. 〇〇1 6 ～ (Please read the notes on the back before filling in this page) 0.0028%, Μη: 0 · 20 ~ 0.22%, Α1: 0 0007 to 0. 0014%, Ν: 〇〇〇〇〇12 ～ 0.0022% and Sb: 0.03% are basically constant components as the basic composition, and the amount of P is a certain amount of 0.02%, S i amount It is a steel with a range of 0. 03 to 1. 49%. And the amount of S i is constant at 0 .. 1 0 to 0. 11%, and the content of P is changed within a range of 0. 0 2 to 0. 29%. Ministry of Economic Affairs, Intellectual Property Office M Industrial and consumer cooperation Du printing Next, after heating these steels at 1 100 ° C for 60 mi η, hot rolling to a sheet thickness of 2 mm, at 600 ° C, the steel strip equivalent to 2 hj: The coil is taken out and kept cool after being kept hot. Then, the hot-rolled sheet is annealed at 90 ° C and 60 S, then pickled and cold-rolled to a plate thickness of 0.5 mm, and finally refined and annealed at various temperatures of 700 to 900 ° C. The particle size of the crystal grains changes in various ways. Then, for this final refined annealed plate, the average film thickness is sprayed: a semi-organic insulating coating of 0.6 μm, and a baking-coated sample is prepared for a punching test. The average crystal grain size was determined by observing a cross-section in the thickness direction parallel to the rolling direction, and using a circle-equivalent diameter obtained by the Jeffries method. The punching test is performed using a round die with a diameter of 21 mm 0. The gap is set to 8% of the thickness of the plate, and the angle formed with the rolling direction is 0. , 45. The diameter of the circle (inner diameter) of the four directions of 90 °, 135 ° is punched out to find the average diameter of the 4 points. At the same time, the Chinese paper size of the 4 points is applicable to the Chinese National Standard (CNS) A4 specification (210x297). 1 mm " -13- 555863 A7 B7 V. The difference between the maximum diameter and the minimum diameter of the description of the invention (Ή) is used as an indicator of the anisotropy of punching. (Please read the precautions on the back before filling this page) The results obtained by sorting the relationship between the drop strength (降 Ρ) obtained from the tensile test piece (JI s 5) cut out in the rolling direction are shown in Fig. 1 and Fig. 2. From Fig. 1, It can be seen from the figure that for the whole, the soft material with a low ρ is for the punching die diameter, and the difference between the punching diameter is large. As the hp increases, the punching diameter is closer to the punching die diameter, and the dimensional accuracy is The improvement trend is because, as is well known in the past, the increase in strength has the effect of suppressing the deformation of the irregular shape at the time of punching. However, one point that must be paid attention to in this experiment is that the sample is added for the strength adjustment. It is the same as the previous type that changes the intensity with the change in the amount of S i When comparing electromagnetic steel plates, excellent dimensional accuracy appears in the same level of strength, and the low YP domain can suppress the difference from the size of the stamping die (Figure 1). Bureau of Intellectual Property, Ministry of Economic Affairs Furthermore, printed by the employee consumer cooperative, the steel with changed S i amount is close to the size of the punching die as the strength increases. However, as shown in Figure 2, the difference between the maximum diameter and the minimum The directional anisotropy represented by the difference is still very large, and the relative directional anisotropy of the punched shape is also improved in the steel whose relative strength is increased by the increase in the amount of P. The relationship between these and the use of the final refined annealed sheet The relationship between the average crystal grain size is shown in Figures 3 and 4. From Figures 3 and 4, it can be seen that the steel that changes the amount of Si will die when the particle size becomes larger. The dimensional accuracy and anisotropy of die cutting are also degraded, and the relative increase in P 0 · 13% or more is the large size of the crystal grain size. The paper size applies the Chinese National Standard (CNS) A4 (210X297 mm) '- 14-555863 A7 B7 __ V. Description of the invention (1 2) Also, the cutting accuracy and the anisotropy of the cutting direction are excellent. (Please read the precautions on the back before filling out this page.) About making P contain a certain amount, you can make the cutting size accuracy or the cutting The reason for the effective improvement of the directional anisotropy, although the detailed reason still needs to be explored, but it may be caused by: (1) the strength is increased by the addition of P, which can alleviate the effect of deforming the deformed shape at the time of punching. (2) ) By adding an appropriate amount, it is considered to be a brittle element of P for steel, so that the effect of breaking the boundary when punching (punching) early, and (3) final refinement with the addition of P The orientation of {1 00 丨 < uvw > in the concentrated structure of the annealed sheet tends to increase, and this is the result of the compound effect of alleviating the anisotropy of various directions. Next, the results reviewed from the aspect of magnetic characteristics will be described. The inventors have strongly limited the content of Si or A 1 that will reduce the saturation magnetic flux density, although it will improve the iron loss. The capital material is steel that has increased magnetic flux density as the base material. The relationship between manufacturing conditions and magnetic characteristics was reviewed in detail. Printed in Figure 5 by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, regarding the thickness of each steel plate: 0.5mm, a test piece was investigated about the crystal grain size of the final refined annealed plate and the iron loss in the commercial frequency domain (W15 / 5 0: The result of the relationship between the frequency of 50 Hz and the maximum magnetic flux density of 1.5 d. As can be seen from the same figure, lowering S i will reduce the resistance, which is not conducive to iron loss. However, the iron loss is greatly changed by the crystal grain size, so the particle size is set to about 30 μ m. From the above, it can be seen that it is a stable low iron loss. In addition, when the resistance was reduced by lowering A 1, it was found that the Chinese national standard (CNS) M specification (21〇 > < 297 mm) was applied to the same particle size as the paper size. 15- 555863 A7 B7 5 Explanation of the invention (13) 3 μm or more is effective for reducing iron loss. (Please read the notes on the back before filling this page.) However, before applying for a patent in this case, when the low S i and A 1 of the present invention is a low-grade non-oriented electromagnetic steel sheet, the average final refined annealed sheet The crystal grain size is limited to about 15 to 2 5 μm as a general rule. The reason is as shown in Fig. 3 and Fig. 4 of 0.1% S i ~ 0.7% P steel (marked in the figure). As shown in the example, when the particle size is increased, the punchability is significantly deteriorated due to the decrease in strength. In contrast, when steel with an increased amount of P is added, even if the average crystal grain diameter is increased to about 30 μm or more, a good punching size accuracy can be maintained. Next, the relationship between the average crystal grain size and the magnetic flux density of each steel type is shown in Fig. 6, and the results of the relationship between the iron loss and the magnetic flux density are shown in Fig. 7. According to B50, the magnetic flux density lies in a magnetizing force of 5 0 0 A / m. Although the sample added S i will improve the iron loss, the magnetic flux density will be greatly reduced. The sample added P is because the crystal grains grow and the iron loss is improved, and the high magnetic flux density can still be maintained. . Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs as a brittle element, as in the present invention, when P is added in a large amount, earing cracks or layered turtles sometimes occur during the cold rolling process. Cracking phenomenon. The present invention is a review and investigation in consideration of this phenomenon, and the results are clear. When it is the heating of the steel slabs during hot rolling, the temperature becomes the area of the coexistence of ferrous iron / vostian iron. The distribution of P between Sitian iron grains is due to the significant segregation of P in the fat iron grains. From this paper scale, the Chinese National Standard (CNS) A4 specification (210X297 mm) is applied. -16- 555863 A7 __ B7 _ _ V. Description of the invention (14) The fact that steel promotes brittleness. (Please read the precautions on the back before filling this page) In order to prevent such embrittlement, it is necessary to set the heating temperature of the steel slab for hot rolling to Vostian when manufacturing the steel plate of the present invention The iron single-phase domain (or, if possible, the fat single-phase iron single phase) is an important condition. Also, 'P is a ferrite-forming element, so it has the effect of reducing the single-phase domain of Vostian iron near the heating temperature of the steel flat block. Although it is in the composition range of low si steel, the steel flat block (steel sheet for thin plates) ) When the heating temperature is between 1 0 0 ~ 1 2 0 ° C, it can be made a Vostian iron single phase. As described above, it has been found that it is very effective to add about 0.1% or more of P to a low Si steel. Therefore, for steel plates containing more than 0.5% of Si, the positive addition of P was also reviewed. [Experiment 2] The Intellectual Property Bureau of the Ministry of Economic Affairs, such as fused C: 〇〇〇〇13 ～ 0.0026, Μη: 〇18 ~ 0.23%, A1: 0.0001 ~ 0.0011%, N: 〇〇〇〇〇〇〇〇0.0029% Printed by the employee consumer cooperatives with roughly constant composition, the amount of si is between 0.60 ~ 2.42, and the amount of steel between 0.04 ~ 0 · 29%, which is heated at 1 1 0 0 t 6 After 0 minutes, it was hot-rolled to a plate thickness of 2 mm and cold-rolled to a plate thickness of 0.5 mm after pickling. As a result, the steel composition differed, and in some cases, layered cracks occurred parallel to the surface of the steel sheet after rolling. The results are shown in Fig. 8. The paper size of the layered crack occurrence image analysis with ΕΡ Μ A applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -17- 555863 A7 _B7___ V. Description of the invention (15 > (Please First read the notes on the back and then fill out this page.) As a result, it was observed that the segregation or thickening of p was found in the crack occurrence part, so the segregation conditions of this p were discussed in detail, and it was found that it was the hot-rolled steel flat block. During heating, the condition P, which is formed in two areas of the ferrous iron phase and the iron field iron phase, is soaked and maintained, and the fact that it is distributed in the ferrous iron phase leads to the enrichment. In other words, it was found to be in the middle ~ In the field of high si steel plate, since the amount of si, which is an element forming iron of fertile grains, is large, the single-phase domain of Vosstian iron is further reduced. The result is that it is easy to become ferrous iron / voss at conventional heating temperatures The problem of Tian iron two-phase domain. Also, when P exceeds 0.26%, lamellar cracking occurs under any composition condition. Therefore, the steel with various Si, Mn, A1, and P contents was produced by researching equipment. Investigated lies in about 1 Ο Ο 0 ~ 1 2 The temperature range of 0 ° C can suppress the segregation of P to the extent that no rolling defects occur. Furthermore, the aforementioned heating temperature of the steel slab is the precipitation of carbides, nitrides, and sulfides present in the steel. The stability of the viewpoint is appropriate. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, first of all, the temperature of the steel flat block heating temperature can become a single phase domain of Vostian iron or single phase domain of ferrous iron, because Segregation due to phase distribution does not occur, so as long as the prescribed amount of P added is small, lamellar cracking can be avoided. From the above experiments, it is known that the added amount of P is necessary to be about 0.26% or less. First of all, investigate the conditions under which high Si steel becomes a single phase of Vosstian iron. The result confirms that Si + A 1 contains more than 0.5% of this paper standard is applicable. National National Standard (CNS) A4 specifications (210X297 mm) -18- 555863 A7 B7 V. Description of the invention (16) Steel is added with P as P $ PA ', but PA, = — 0.2Si + 0.12Mn- (Please read the back Please fill in this page for attention) 0.32A1 + 0.36 (" '(Si, Μη , A1, P are expressed in mass%). The range is in the single-phase domain of Vosstian Iron. Therefore, when the above conditions are met and limited to P $ about 0.26%, it can be suppressed by P Then investigate the conditions under which medium to high Si steel becomes a single phase of ferrous iron, and the amount of P added is also P 2 PF ', but PF5 = -0.34Si + 〇.20Mn- 0.54A1 + 0.76-(2) 5 The range printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (each of the contents of Si, Mn, A1, and P is expressed as mass%) was found to be in the single-phase domain of ferrous iron, so this condition is satisfied When the limit of PS is about 0.26%, the embrittlement caused by P can also be suppressed. Now we will investigate the steel flat block (steel sheet for thin plate) in the single phase domain of ferrous iron or single phase domain of ferrous iron. Conditions for inhibiting the segregation of P when heating is difficult. When the concentration of P occurs in the two phases of ferrous iron / Wotian iron, the concentration of P in the ferrous iron phase also becomes the above-mentioned p F ', but The paper size of the survey is applicable. National National Standard (CNS) A4 specification (210X297 mm) -19- 555863 A7 ___B7_ V. Description of the invention (17 ) As a result, it was found that when P F ′ is reduced to about 0.26 or less, embrittlement caused by P can be avoided. (Please read the precautions on the back before filling this page) When finishing the embrittlement avoidance conditions of the above two-phase domain and the embrittlement avoidance conditions of the single phase domain of ferrous iron, it can be summarized as: PS about 0.2 6% aPF '$ is about 0.26%. Summarizing the above relationships, the conditions to avoid embrittlement caused by P are: P $ is about 0.26%, and PSPA 'or PF, the convention is 0.26%. From the above results, it is found that the amount of P added is within about 0.26%, and when hot rolling is heated, under conditions of single-phase heating of single-phase or ferrous iron by Vostian iron, it is necessary to avoid the occurrence of cold. It can be produced with the problem of lamellar cracks after rolling. In addition, under the condition that the ferrous iron / Wastian iron is heated in a two-phase condition, it is still possible to use a relatively high amount of A 1 for a component system in which the P distribution amount of the ferrous iron phase is reduced, and S i Manufacturing facts. Furthermore, when P is added by about 0.1% or more, the temperature range of the steel slab during hot rolling (approximately 1 0 0 0 t to 1 2 0 0 ° C) becomes a Vosstian iron or fertilizer. The various steel compositions of single-phase grain iron are reviewed. The results were printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. It was found that the result of the addition of Ni, which is an element suitable for improving magnetic properties and ensuring strength, and the expansion of P-added steel lies in Vostian near the hot rolling temperature. The fact that the purpose of the iron field is also very effective. 〔Experiment 3〕 C: 0. 013 ~ 0. 026%, Mη ·· 0 · 18 ~ 0.28%, A1: 0.0007 ~ 0.0013% 'This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm1) " '" -20- 555863 A7 B7_ V. Description of the invention (18) N: 0.0 014 ~ 0.0025% and P: 0 · 16 ~ (Please read the precautions on the back before filling this page) 〇 · 1 8% The substantially constant composition of the ground is the basic composition. Samples whose S i content is 0.95 to 2.44% and Ni content is 0 to 2.20% were respectively rolled in Experiment 2 to 0.50 nm. ， Investigation of the occurrence of layered cracks in the cold-rolled steel body obtained. The results are shown in Figure 9. The cracked 1.1% ~ 1.5% Si steel is the case without Ni. It is possible to roll when Ni is added without cracking. On the other hand, 1.95% Si steel or 2. 4% Si steel without Ni addition or rolled out has the effect of increasing Ni. There are also cracks from time to time, which shows that the effect of Ni is the fact that the correct field exists. It was also found that when the effect of Ni was added, and the above formula was expanded, it was S i + A 1 Contains less than 0.5% In the above steel, the amount of P added is about 0.26% or less, and PSPA, but printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. PA = — 〇 2Si + 0 · 12Μη — 0 · 32A1 + 〇.〇5Ni2 + For the range of 〇.10Ni + 〇.36-(1), the heating temperature of steel slabs at 1000 ° C ~ 12 0 ° C lies in the single-phase domain of Vosstian iron, and the PFS is about 0. 2 6 But this paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 21-555863 A7 ΒΊ ___ 5. Description of the invention ((Please read the precautions on the back before filling this page) PF = -〇. 34Si + 0.20Mn-〇.54Al + 〇.24Ni2 + + 〇28Ni + 〇.76 ^ P… (2), that is, the degree of concentration of P can be concentrated under the two-phase domain or single phase domain of ferrous iron Less, and any one can avoid the embrittlement caused by P. Also in the above two formulas, the respective contents of Si, Mn, Al'P'Ni are expressed as ma ss%. Also, the technical of PF and PA The meaning is the same as the above-mentioned PF 'and PA'. [Experiment 4] Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs for rolling to 0.5 mm in Experiment 2 and Experiment 3. After the steel sheet to final finish annealing average film thickness of the coating 0. 6 μπι semi-organic insulating coating of, embodiments of the baking finish. The test pieces were subjected to a punching test according to the method described in Experiment 1. The diameter and anisotropy of these samples were investigated. The results are shown in Figs. 10 and 11. From these figures, it can be seen that the steel with Si + Α 1 containing 5% or more and the steel containing 卩 ^ 0 · 10% can significantly improve the punching dimensional accuracy. Therefore, in the Ni-added steel, the amount of addition was changed between 0.38 and 2.20%. Figure 12 shows the relationship between the magnetic flux density b5Q and the tensile strength T S of these samples. In this example, T S is obtained by the same tensile test as Experiment 1, and the magnetic flux density is also measured by Experiment 1. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -22- 555863 A7 B7 V. Description of the invention (20) The steel containing P above 0.1% is higher than before. Please read the notes on the back before filling in this page) The comparison of electromagnetic steel plates with si composition (ie, Si + A 1 > 0.5%) shows excellent B 5 〇-TS balance. In particular, as the amount of P added increases, T S increases but no decrease in magnetic flux density is seen, but it tends to increase. This is a feature compared to the fact that conventional steel sheets are strengthened by adding alloying elements other than ferrites such as S i and A 1 when the steel sheet is strengthened with a decrease in magnetic flux density. Sex. These characteristics are very suitable for the rotor base material of various rotating machines (motors, generators) such as DC brushless motors and reactors that require high torque, miniaturization, and high-speed rotation of motors. From the above knowledge (knowledge and insights), as the conditions for the excellent magnetic flux density and punching accuracy of the two, the amount of Si, A1, P, Ni in the steel is specified. Furthermore, in the case of a low S i steel, the average crystal grain size of the final refined and annealed sheet is defined in the following range. For low Si steels, the total of one or two of Si and A 1 is about 0. 0 3 to 0.5%. The Intellectual Property Bureau of the Ministry of Economic Affairs (Si and A 1 printed by the Industrial and Consumer Cooperatives have a deoxidizing effect when added to steel. Therefore, they are used alone or as a deoxidizer for deoxidizing. Separately or the total of the two is required to be about 0.30% or more, and Si and A1 can improve the iron loss of the specific resistance, but on the other hand, it can also cause the saturation magnetic flux density to decrease, so The upper limit is 0.5%. For medium to high Si steels, the total of one or two of Si and A1 is 5% or more to approximately 2.5%. This paper size applies to Chinese national standards ( CNS) A4 specification (210X297 mm) -23- 555863 A7 B7 V. Description of the invention (21) If the mechanical strength or low iron loss is valued at the same time as excellent dimensional accuracy, the total amount of si + A 1 may contain 0. 5% or more (Please read the precautions on the back before filling out this page) As mentioned above, in the case of medium to high Si steel, the effect of adding P can still be obtained from the low P medium to high Si steel. By comparison, materials with high punching accuracy and strength-magnetic flux density balance. However, S When the total amount of i + A 1 exceeds 2.5% or more, the method according to the present invention still makes ordinary cold rolling difficult, so the range is specified to be 0.5% to 2.5%. P: Above about 0.10% and below about 0.26%, P is a particularly important element in the present invention, and P is a function of adjusting the hardness of the material by its high solid solution strengthening energy, as is well known in the past, especially Low S i and low A 1 steel sheets are relatively soft in nature. In the present invention, in order to reduce iron loss, the average crystal grain size must be set to about 30 μm or more. Therefore, the steel sheet may be softened. P is an element necessary for improving the punchability of the steel sheet of the present invention, in other words, to suppress the irregularity or increase in rebound of the punched shape due to insufficient strength of the steel sheet. Consumption of the Industrial Property, Intellectual Property Bureau, Ministry of Economic Affairs Cooperative printed on the increase in strength of this material, plus the effect of suppressing the total deformation during punching by breaking the boundary early, and increasing the {1 0 0丨 < u vw > Orientation to improve directional anisotropy The combined effect of the effects can improve the dimensional accuracy of punching. Furthermore, it has the characteristic that the magnetic flux density does not decrease even though the strength of the steel plate is increased, and this effect is still in the medium to high Si steel. The paper size will be issued in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm) -24- 555863 A7 B7 V. Description of the invention (22). In order to exert this effect, P needs to contain about 0.10% The above (please read the precautions on the back before filling in this page). On the other hand, P is originally an embrittlement element for steel. If the excess is added, it may cause ear cracks or layer cracks, which will reduce the manufacturability. In this regard, it is because the manufacturing method is improved, or by adding Ni, it is possible to make high-P added steel, which has been difficult to manufacture in the past. However, when the content exceeds 0.26%, it is still difficult to manufacture the P-added steel when the manufacturing method of the present invention is used. Therefore, the amount of P is limited to a range of about 0.10% to about 0.6%. Ni: about 2.3% or less (can be added optionally) Ni not only has the effect of improving the aggregate structure of steel and the magnetic flux density, but also has the effect of increasing the resistance of steel and reducing the iron loss , And the effect of strengthening the solid solution to increase the strength of the steel to suppress the shape irregularity during punching, so it must be actively added. Furthermore, Ni is a forming element of Vostian iron, so it has a heating temperature of 1 0 Ot, which is suitable for expanding the flat steel block (steel sheet for thin plates) ~ Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 2 0 0 The effect of Vostian iron domain (circle r in the state diagram) near ° C. In particular, steels with a composition of Si + A 1 in an amount of more than 0.5% are effective in increasing operational stability. When this effect is applied, the rolling instability when P, which is an embrittlement element, is actively added as in the present invention can be greatly improved. In other words, the main point of the stable manufacturing of high-P steel is to suppress the excess P during hot rolling, and as a powerful method, it is to try to avoid the addition of steel flat blocks (steel sheets for thin sheets). The paper size applies Chinese national standards ( CNS) A4 specification (210X297 mm) -25- 555863 A7 B7 V. Description of the invention (23 ^ (Please read the precautions on the back before filling this page) The thermal temperature becomes the ferritic iron / vostian iron two-phase domain When the total content of Si content and A1 content exceeds 0.5%, it is due to the hot temperature of the steel slab and it is easy to separate into two phases. However, due to the expansion effect of the 9 " domain of Ni, and Under such a S i 'A 1 composition, it is also possible to make it a single phase of Vosstian iron when the steel flat block is heated. However, when Ni content is about 2.3% or more, the ferrous iron ( r)-> The reduction of the temperature of the Vostian iron (r) at the beginning of metamorphosis is due to the fact that the Vostian iron is deformed during the final refining annealing, which may cause a decrease in the magnetic flux density. It is also a low temperature below the metamorphic temperature. At the final refining annealing temperature, it is difficult to ensure a flatness above about 3 μm in low Si steel. The particle size and iron loss also deteriorate. So Ni is set to contain about 2.3% or less. In addition, when Ni is added, it is appropriate to add about 0.50% or more. In low Si steel, The average crystal grain size of the final refined and annealed plate: above about 30 μm, below about 80 μm. The Bureau of Intellectual Property, Ministry of Economic Affairs, B (printed by the Industrial and Consumer Cooperatives in the present invention has low S i and low A 1 has no directivity In order to obtain good iron loss characteristics in the electromagnetic steel sheet, as shown in FIG. 5, the average crystal grain size of the final refined and annealed sheet must be about 30 μ m or more. However, it should be more than about 80 μm. When the particle size is smaller, the effect of improving iron loss cannot be obtained. In addition, the steels belonging to the present invention are all metamorphic steels, and the single-phase domain of ferrous iron suitable for recrystallization annealing is about 7 0 t ~ The range of 9 0 0 t is low temperature when compared with the ferrite single-phase steel with a high Si composition. Therefore, the temperature of the grain growth is disadvantageous because of the productivity of the continuous short-time annealing equipment. The upper limit is limited to about 80 μm. In addition, in medium to high Si steel, it is because The resistance of the paper is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -26- 555863 A7 ___B7 V. Description of the invention (24) (Please read the precautions on the back before filling this page) It is easy to obtain a relatively low iron loss due to the improvement effect, etc. Therefore, the particle size is not particularly limited, and a normal range is sufficient. Generally, it is about 20 to 200 μm. Then, the inventors and others followed In recent years, due to the high-speed rotation of the motor and the increase in the number of poles, it has been gradually valued. However, in order to review the methods to improve the magnetic characteristics in the high-frequency region, the results show that reducing the thickness of the board is effective, especially in low S. The effect is remarkable in i steel, and the experiments leading to the results are shown below. [Experiment 5] The survey shown in Fig. 13 shows 0.1% Si—0.01% P steel, 0—95% Si—0.02% steel, and 2.0% Si—0.5% A1 steel. The result lies in the thickness dependence of the iron loss at 400 Hz. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs as shown in the figure, any sample also reduces the eddy current loss by reducing the thickness of the plate. Therefore, the local frequency iron loss has a tendency to be improved, and it is also known that the high thickness caused by reducing the thickness of the plate The improvement effect of frequency iron loss is the case where the low Si steel is larger. However, up to now, the thickness of non-oriented electromagnetic steel sheets has mainly been 0.5 mm, and the reduction of the thickness above is only applicable to high-quality products with higher content than Si and A 1 of the resistance element. Part of it is that there are no examples of applicable products on non-oriented electrical steel sheets with small contents of Si or A1. In addition, Figure 14 shows that the paper size of these blanks for surveying the magnetic flux density is subject to the Chinese National Standard (CNS) A4 specification (210X297 mm) -27- 555863 A7 B7 V. Description of the invention (25) Thick dependence Sexual results. (Please read the precautions on the back before filling this page) As shown in the figure, when reducing the thickness of the board, there is a tendency to decrease the magnetic flux density slightly. However, it should be reduced slightly, and it is also low in any of the board thicknesses. Si steels have significantly higher magnetic flux densities. In particular, high-speed rotary reactance motors have been reviewed for the use of electric motors (EVs) or hybrid electric vehicles (HEVs) as driving motors. In this application, high magnetic flux density and low frequencies at high frequencies will be valued. Iron loss property, but for this problem, as shown in the present invention, low S i, low A 1 and essentially high steel flux density steel sheet can be reduced by thinning. As shown in FIG. 13, the effect of reducing the thickness of the plate is significant when it is 0.35 m or less, and it is more significant when it is 0.30 m or less. In addition, the thinner the plate, the more effective it is in reducing eddy current losses. Therefore, no lower limit is specifically set, but on the other hand, the number of laminations of the iron core is increased to increase the cost, and the lamination of the laminated iron core is also performed. The disadvantages are difficult, so for general production, the lower limit is about 0.10 mm is appropriate. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs The reasons for limiting the components other than Si, A1, P, and Ni in the steel of the present invention will be described below. C: 〇 ～ 〜〇. 〇1 〇% C is caused by the aging effect. After the steel plate is manufactured, the element that degrades the magnetic characteristics (iron loss) with the passage of time. The degree is more than the content of C. At about 0.10%, it will be significant, so the content of c is limited to less than 0 · 0 1 0%. Regarding the deterioration characteristics of ageing, that is, the amount of c is greater, the Chinese standard (CNS) A4 specification (210 Father 297 public envy 1 -28- 555863 A7 B7 V. Description of the invention (26 ^ less healing is appropriate, so in the present invention, for the amount of C, it also includes the case of substantially zero (under the analysis limit). (Please Read the precautions on the back before filling in this page) Μ η: About 0.5% or less Mn is used to fix S in the form of Mn S, which has the effect of suppressing embrittlement during hot rolling caused by Fes. The increase in the Mn content will increase the specific resistance and improve iron loss, but the increase in the Mn content in the other side will lead to a decrease in the magnetic flux density. Therefore, the upper limit of the Mn content is limited to about 0.5 · 5% 0 S : About 0.05% or less S is an inevitable impurity (impurity), and F e is as described above. In the case of s-situ precipitation, it is not only the cause of hot rolling brittleness. If it is finely precipitated, the grain growth is deteriorated. Therefore, it is advantageous to reduce it as much as possible from the viewpoint of reducing iron loss. In addition, the amount of S exceeds approximately 〇 · 〇 At 15%, the deterioration of iron loss becomes significantly larger, so the upper limit is limited to about 0.015%. However, on the other hand, S also has the effect of improving the shape of the shear when it is punched. Therefore, the degree of reduction depends on the use. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs N: about 〇. 〇 1 〇% NR is unavoidably mixed with impurities (impurities). If it becomes A 1 When Ν is finely precipitated, it will hinder the growth of grains and degrade the iron loss, so it is limited to about 0. 10% or less. The above has explained the essential components and inhibitory components, but the present invention has other magnetic properties. It can improve the composition and may contain the following elements as appropriate. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -29- 555863 A7 B7_ V. Description of the invention (27)

Sb and / or Sn: about 40% or less in total (please read the precautions on the back before filling in this page) S b 'S η is mainly at the grain boundary, which is derived from the grain boundary by suppressing the recrystallization of steel 〇1 ％ 的 The recrystallization nucleus of the {1 1 1 丨 orientation is generated to improve the effect of magnetic flux density and iron loss. In order to obtain this effect, it is contained in a total of 0.01% or more in either case alone or in combination. Better. Although it contains such an excessive amount, its effect is saturated, but when the content exceeds 0 · 40%, it becomes brittle and cracks occur during cold rolling. Therefore, whether it is used alone or tincture, the total content is included. Below about 0.4% is suitable. Next, other secondary contained elements will be described. In the present invention, S which exists as a deoxidizing agent or as an impurity is an element that is effective in capturing with M η and may contain Ca in a range of about 0. 0.001% or less. In addition, it is possible to add B: oxidizing and nitriding during annealing to relieve strain; about 0: 0.5% or less, and Cr: about 0.1% or less. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Other elements that do not impair the magnetic characteristics and add conventional elements such as Cu and M0 will not impair the effect of the present invention. In terms of cost, the content of each element is preferably 0.1% or less. Regarding other components, ie, carbonitride-forming elements such as T i, N b, V, etc., a small amount is allowed, but it is more suitable to maintain iron loss when it is as small as possible. Furthermore, when it comes to medium and high Si steel, as mentioned above, the paper size of the steel flat block is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -30- 555863 A7 B7___ V. Description of the invention (28) ( Please read the precautions on the back before filling this page.) The heating temperature may be based on the single phase design of one of the Wastfield iron phase or the ferrite phase, or the In the two-phase state, the component concentration design of P that can easily reduce the concentration of P, which is easy to be enriched, and the iron phase, can be used to implement the local segregation that suppresses the excess of P, so that a stable high P addition can be produced. and also. Specifically, in order to suppress the precipitation and stability of carbides, nitrides, sulfides, and the like present in the steel, the heating temperature (approximately 1 0 0 0 t ~ 1 2 0 0 ° C) of the steel block is suitable. For excessive local segregation, let the index PA expressed by the following formula: PA = -0.2.2Si + 0.12Mn-0. 32A1 + 0.05Ni2 + 0.10Ni + 0.36. (1) The relationship between P content is satisfied PSPA or the index PF expressed by the following formula: Intellectual Property Bureau of the Ministry of Economic Affairs g (printed by the Industrial and Consumer Cooperatives =-〇_ 34Si + 〇. 20Mn-〇. 54A1 + 〇.24Ni2 + 〇.28Ni + 〇.76… (2) With PFS about 0.26 (S i, M η, A 1,

The unit of Ni ′ P is ma s s%). This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -31-555863 A7 B7 V. Description of the invention (29) In this example, PA is in the composition of various si, M η, A 1, N i Based on the guest test, the temperature range of about 1 〇 〇 0 ° C ~ 1 2 〇 〇t (please read the precautions on the back before filling in this page). PF is also the P content which becomes the lower limit of the iron content of the fat obtained from the lean test. The manufacturing conditions of the present invention will be described below. After melting and adjusting the Kariya steel with the above-mentioned suitable composition by the converter refining method or the electric furnace melting method, it is made into a steel flat block (steel sheet for thin plates) by continuous casting method or a block_rolling method. ). Next, this steel slab is heated and provided for hot rolling. In this case, in order to stabilize the precipitation of carbides, nitrides, sulfides, and the like existing in the steel, the heating temperature of the steel slab is preferably about 100 ° C to 120 ° C. As mentioned before, the phase state of the steel slab during heating is very important to suppress the local segregation of excess p. Due to the P-type fertilizer grain iron forming element, it has the effect of reducing the single-phase domain of Vosstian iron near the heating degree of the steel slab. However, in the case of low S i steel, in the composition range of the present invention, only the steel slab heating temperature is required. When it is about 1000 ° c ~ 12 0 ° C, it can become a single phase of Vosstian iron. When the medium-high Si steel is printed by the Intellectual Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, as long as it can meet the composition system of the above-mentioned pspa, it means that the heating temperature of the steel flat block is about 1000-1200. In the range of C, it can be made into a single phase of Vosstian iron. In addition, when medium to high Si steels can satisfy the composition system of PFS of about 0.26, although it is under the coexisting domain of ferrous iron / Vostian iron, the segregation of P in the ferrous iron phase The degree can be maintained at a level that avoids embrittlement. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -32- 555863 A7 B7 V. Description of the invention (30) It is also in the ferrous iron. When the single-phase domain is heated, as long as the P content is about Within 0.26%, it can be manufactured without causing layered cracks. (Please read the notes on the back before filling this page.) The coiling temperature of the hot rolled steel strip coil (C0i 1) is very important in the present invention to ensure the manufacturability of high-P steel. In detail, when the coiling temperature of the steel strip coil is high, iron phosphide (F e 3 P) is generated during the cooling of the steel strip coil, and the bendability or rollability of the hot-rolled sheet is reduced. The temperature is preferably about 6 5 0 ° C or less, preferably about 6 0 0 ° C or less, and more preferably about 5 5 0 t or less as low temperature as possible. It is also effective to speed up the coiling by immersing in a water tank, or to accelerate the cooling of the coils by discharging water or the like. Next, the hot-rolled steel strip coil is subjected to descaling treatment by means of pickling or the like, and then subjected to cold-rolling treatment, but hot-rolled sheet annealing may be performed in order to further improve magnetic characteristics. For low Si steels with a total Si content and A 1 content of 0.5% or less printed by the 8th Industrial Cooperative Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the annealing temperature of the hot-rolled sheet is to avoid the coexistence of ferrous iron and Vostian iron Domain (two-phase domain) is preferred. This is because when annealing is performed in the two-phase domain, crystal grain growth is difficult to progress, and it is difficult to expect improvement in magnetic characteristics such as magnetic flux density. In the following, the appropriate hot-rolled sheet annealing temperature for low Si steels will be described in terms of the amount of Ni. When no Ni steel is added, or when the Ni content is relatively small, such as Ni content less than 1.0%, hot-rolled sheet annealing is usually performed on non-oriented electrical steel sheets. Generally, it is about 90 ° C or more. The iron single-phase domain may be annealed. Or, the annealing temperature is slightly higher, and the standard of Chinese paper (CNS) A4 (210X297 mm) is applicable to the standard of Vostian iron single paper at A c 3 -33- 555863 A7 B7 V. Description of the invention (31) ( Please read the notes on the back before filling in this page) Phase domain (most suitable is about 1050 ~ 110 ° C). In short, it is important to avoid annealing in the two-phase domain (especially around 9501) in the middle of the two. On the other hand, when the Ni content is more than 1.0 to 2.3%, the production temperature of Vosted iron during annealing will decrease, so the annealing temperature at about 900 ° C will also become a two-phase field, resulting in The magnetic flux density decreases. Even so, the annealing of the ferrous grain iron single-phase domain below 900 ° C is not able to obtain sufficient magnetic flux density due to insufficient grain growth, so the hot-rolled sheet annealing conditions in this composition are limited to, A c Vostian iron single-phase domain above 3 o'clock (preferably in the range of 105 ° C to 110 ° C). In addition, for medium to high Si steels, low iron loss is also easily obtained in the state of fine grains as described above. Therefore, the grain growth during annealing is not as important as that of low si steels, so the annealing temperature of hot-rolled steel is not It is specifically limited, but it is usually suitable to be in the range of 700 1 to 1100 ° C. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Then, the obtained steel strip coil is subjected to descaling and then subjected to cold rolling or warm rolling, or secondary cold rolling (or warm rolling) with intermediate annealing in between. , Processed into products of the specified thickness. Thereafter, final refining annealing is performed. In the case of low S i steel, this final refining annealing is performed in a single phase domain of ferrous iron above 700 ° C. The reason is that if the final refining annealing temperature is less than 700 ° C, it is difficult to stably increase the average crystal grain size to 30 µm or more. On the other hand, when growing Vostian iron grains beyond the single phase domain of ferrous grain iron, the deterioration of the aggregate structure leads to deterioration of magnetic flux density and iron loss. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) '' -34- 555863 A7 _B7_ V. Description of the invention (32) (Please read the precautions on the back before filling this page) The grain growth of Si steel is not as important as that of low Si steel during annealing, so the temperature for the most refined annealing is not specifically limited, but it is usually 7 0 0 ° C ~ 1 1 The range of 0 0 ° C is suitable ° Single-phase temperature of ferrous grain iron or hot-steel single-phase domain of hot-rolled and cold-rolled steel is observed by optical microscope, etc. The domain can be determined by applying heat to the water-cooled tissue. The other method is to estimate it in advance using a calculation state diagram obtained by thermodynamic calculation software such as Thermo-CaUTM. After the final refining and annealing, the insulating film can be applied in the same way as a general non-oriented electrical steel sheet. The method of applying the insulating film is not particularly limited. The method of baking coating after the application of the treatment liquid is very suitable. The resulting steel strip coil is cut and processed to the necessary width and size, and then it is punched (punched) into the shape of the motor stator and rotor by the manufacturer, and the product is laminated. Sometimes it is punched. After applying strain relief annealing (usually 7 5 ° CX 1 ~ 2 h), the product is also manufactured. Bureau of Intellectual Property, Ministry of Economic Affairs (printed by the Industrial and Consumer Cooperatives (Example) [Example 1] Melt steel composed of the ingredients shown in Table 1 by laboratory melting, after casting, and hot rolling into plates Thickness: 30 mm steel sheet. After heating at 600 ° C at 110 ° C, it is hot rolled to a sheet thickness of 2 mm. After being uniformly heated at 600 ° C for 2 h, it is equivalent to a steel strip coil. After cooling, the hot-rolled sheet was annealed at 9 5 ° C for 60 S and was 'picked' to implement this paper. The Chinese standard (CNS) A4 specification (210 > < 297 mm) was applied -35- 555863 A7 B7 V. Description of the invention (33) Cold rolled to 0 · 50 mm thickness (1 cold rolling). At 7 〇 °° C ~ (Please read the precautions on the back before filling this page) 9 0 〇 ° The temperature of various kinds of C is subjected to the final refining annealing, and the recrystallized grain size is changed into various kinds. Also, in cold rolling, the steel J whose P content exceeds the range of the present invention is that most of the cold rolling occurs parallel to the plate surface. The layered cracks, therefore, will not be judged after stopping the post. Also 'No _ 56 ~ 59 is after hot rolling without hot rolled sheet annealing, but in The cold rolling is completed by a secondary cold rolling method with intermediate annealing at 800 ° C. Then, the obtained final refined annealed plate is coated with a semi-organic insulating coating with an average film thickness of 0.6 μm to make Samples for various tests. Punching test: Use a round punching die with a diameter of 21 mm 0, the gap is set to 8% of the thickness of the plate, and the angles formed with the rolling direction are 0 ° and 45 °, respectively. The diameter (inner diameter) of the punched circle in four directions of 90 ° and 135 °. To find the average diameter of the four points, the difference between the largest and smallest diameters of the four points is taken as the anisotropy of the punching in all directions. The magnetic characteristics printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs are printed at an angle of 0 ° with the rolling method, and are trimmed to a fineness of 180 mm X 30 mm at 90 °. The strip-shaped test piece was measured by the Epstein Process. The yield stress (YP) is a JIS No. 5 test piece cut out parallel to the rolling method, and the resistance is implemented at a speed of 10 mm / mi η. Zhang test, using the advantages of up and down. The results obtained are not shown in Table 2, and Table 3. The paper ruler Applicable to China National Standards (CNS) 8-4 specifications (210X297 mm) -36- 555863 A7 i. Description of invention (34) Table 1 Composition of steel symbols (mass%) C Si A1 Mn SPN Sb Sn A 0.0027 0.03 0.0008 0.21 0.0040 0.02 0.0015 0.030 < 0.001 B 0.0026 0.10 0.0008 0.22 0.0035 0.02 0.0020 0.032 < 0.001 C 0.0019 0.53 0.0012 0.22 0.0023 0.02 0.0018 0.030 < 0.001 D 0.0019 0.95 0.0007 0.20 0.0033 0.02 0.0012 0.030 < 0.001 E 0.0022 1.48 0.0014 0.21 0.0041 0.02 0.0022 0.033 < 0.001 F 0.0016 0.11 0.0015 0.20 0.0074 0.07 0.0019 0.030 < 0.001 G 0.0017 0.11 0.0008 0.21 0.0036 0.13 0.0022 0.031 < 0.001 Η 0.0023 0.11 0.0011 0.22 0.0022 0.18 0.0014 0.030 < 0.001 I 0.0028 0.11 0.0006 0.22 0.0075 0.25 0.0018 0.031 < 0.001 J 0.0016 0.11 0.0014 0.21 0.0060 0.29 0.0016 0.032 < 0.001 ---------- ^ clothing-(Please read the precautions on the back before filling this page)

， 1T Printed by the Intellectual Property Bureau of the Ministry of Economy ’s Consumer Cooperatives. This paper is printed according to the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -37- 555863 A7 B7 Printed by the Employee ’s Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 35) Table 2

No. Steel mark particle size (μιη) Β50 (Τ) Wl5 / 50 (W / kg) YP (MPa) Punching diameter (mm) Punching diameter Max-min (μιη) Remarks 1 A 11.3 1.818 9.79 311 20.979 17 Compare Example 2 // 20.5 1.811 6.85 243 20.963 21 // 3 // 28.2 1.807 5.90 214 20.959 28 // 4 // 31.9 1.804 5.45 204 20.957 29 // 5 // 42.8 1.797 5.09 182 20.952 25 // 6 // 61.3 1.785 4.62 160 20.950 34 // 7 B 10.8 1.808 10.23 322 20.981 16 Comparative Example 8 // 20.3 1.806 6.85 249 20.968 14 // 9 // 26.8 1.801 5.99 223 20.961 18 // 10 // 31.5 1.796 5.52 210 20.959 19 // 11 // 46.2 1.786 4.94 183 20.954 23 // 12 // 78.2 1.775 4.50 152 20.945 26 // 13 C 9.3 1.786 10.95 375 20.985 9 Comparative Example 14 // 16.0 1.782 7.57 305 20.980 14 // 15 // 33.6 1.771 5.22 236 20.970 13 11 16 // 59.4 1.764 4.43 198 20.964 17 // 17 // 78.9 1.757 4.25 183 20.957 31 // 18 D 12.2 1.772 8.57 368 20.990 15 Comparative example 19 // 23.5 1.767 5.88 297 20.977 12 // 20 // 27.2 1.764 5.54 284 20.976 14 // 21 // 42.8 1.758 4.56 249 20.968 12 // 22 // 55.5 1.754 4.25 233 20.9 64 15 // 23 // 64.9 1.746 4.20 224 20.962 16 11 24 E 18.2 1.755 6.48 361 20.990 16 Comparative example 25 // 26.8 1.752 5.20 324 20.986 15 // 26 // 31.7 1.749 4.68 310 20.983 13 // 27 // 45.6 1.741 4.18 284 20.980 14 // 28 // 66.8 1.726 3.90 261 20.976 17 // (Please read the notes on the back before filling out this page) This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -38 -555863 A7

7 B V. Description of Invention (36) Table 3 Printed by the Consumer Cooperative of the Intellectual Property Office of the Ministry of Economic Affairs

No. Steel particle size (μιη) Β50 (Τ) Wl5 / 50 (W / kg) YP (MPa) Punching diameter (mm) Punching diameter Max-min (μιη) Remarks 29 F 8.6 1.813 11.80 377 20.989 7 Compare Example 30 11 26.5 1.811 5.99 246 20.975 11 // 31 // 33.4 1.809 5.45 227 20.973 10 // 32 // 52.0 1.802 4.77 196 20.966 14 // 33 // 59.7 1.797 4.75 188 20.960 16 // 34 G 11.3 1.817 9.69 363 20.995 6 Comparative Example 35 // 16.2 1.815 7.70 320 20.993 5 // 36 // 26.5 1.814 5.95 271 20.989 6 // 37 // 33.6 1.812 5.40 252 20.988 4 Invention Example 38 // 43.8 1.808 4.95 233 20.986 5 // 39 / / 75.2 1.804 4.45 201 20.984 7 // 40 Η 11.3 1.822 9.66 384 20.995 3 Comparative Example 41 // 14.8 1.819 8.10 351 20.996 4 11 42 // 23.0 1.819 6.34 305 20.995 5 // 43 11 25.6 1.819 6.02 295 20.994 6 // 44 11 35.6 1.816 5.26 269 20.993 4 Invention Example 45 11 40.2 1.814 5.05 260 20.933 4 11 46 // 56.8 1.813 4.62 237 20.992 3 // 47 // 77.6 1.811 4.41 220 20.991 6 // 48 I 10.8 1.826 9.93 420 20.994 3 Compare Example 49 // 13.5 1.824 8.55 391 20.995 4 // 50 // 26.8 1.821 5.77 321 20.996 5 II 51 // 32.5 1.820 5.15 305 20.9994 4 Invention Example 52 // 40.8 1.818 4.94 288 20.993 5 // 53 // 56.4 1.817 4.59 267 20.994 4 // 54 11 60.5 1.816 4.53 263 20.992 4 55 J Cracked without evaluation Comparative Example 56 Β 19.8 1.784 7.98 260 20.965 16 Comparative Example 57 // 39.4 1.761 5.22 199 20.953 21 // 58 Η 18.2 1.795 7.81 335 20.993 6 Comparative Example 59 // 35.6 1.861 5.26 269 20.993 4 Invention Example This paper size applies to China National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling out this page) -39- 555863 A7 B7 V. Description of the invention (37) (Please read the precautions on the back first Please fill in this page again) The steels A ~ F (N 〇. 1 ~ 33, 56, 57) which are within the appropriate range of the present invention for P content, or whose strength changes due to changes in the amount of si and the grain size With the increase of γρ, the punching diameter tends to be closer to the punching die diameter. However, the directional anisotropy of the punched size displayed by the difference between the maximum diameter and the minimum diameter is relatively large at about 10 to 20 μm. Furthermore, as the amount of Si increases, there is a problem that the magnetic flux density decreases. In contrast, according to the present invention, when the composition of S i and A 1 is low and P contains more than 0.1% of steel G ~ ΗNa, YP is lower than 350MPa, which is a relatively low die, it also shows a good punching. Diameter, and the dimensional anisotropy of the punching size is also small. From the aspect of magnetic properties, although the average crystal grain size of these steels is controlled to be more than 30 μm, but (Νο · 37,38,39,44 , 45, 46, 47, 51, 52, 53, 54, 59) all show stable low iron loss and obtain high magnetic flux density. [Example 2] Printed by the laboratory of the Ministry of Economic Affairs and the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives, the molten steel composed of the components shown in Table 4 was melted in the same manner as in Example 1, and a hot-rolled sheet having a thickness of 2 mm was produced. 'After annealing at 1 1 0 0 ° C 3 0 S hot-rolled sheet, pickling is applied' Cold rolling to a thickness of 0.50 mm, followed by more than 7 0 t, and in the single phase domain of ferrous iron The final refining annealing applied at various temperatures will change the recrystallized grain size to various sizes. Next, the same semi-organic insulating film as in Example 1 was applied to produce test pieces for various tests. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 Gongchu: Ί -40-555863 A7 B7 V. Description of the invention (38) The test results are shown in Table 5. In this example, steel K ~ M is a reduction of S i, the deoxidizer who lends A 1 and the steel N. ◦ group and the steel Q. R group are those who can be melted under the influence of adding Ni. The steel composition of the present invention is satisfied, and Suitable steels with an average crystal grain size of 30 μm or more have excellent punching dimensional accuracy, and not only have small anisotropy in punching, but also have excellent magnetic properties, especially compared with steel N. With steel ◦ and steel Q and steel R, the addition of Ni 〇 and steel R shows a significant increase in magnetic flux density. Table 4 (Please read the precautions on the back before filling this page) Ministry of Economy Composition of the printed steel mark composition (mass%) of the Intellectual Property Bureau employee consumer cooperative C Si A1 Μη S Ni PN Sb Sn K 0.0011 0.01 0.32 0.25 0.0032-0.05 0.0020 < 0.001 0.044 L 0.0009 0.01 0.33 0.24 0.0039 0.16 0.0021 < 0.001 0.046 Μ 0.0019 0.02 0.31 0.22 0.0018-0.24 0.0024 < 0.001 & l t; 0.001 Ν 0.0033 0.21 0.23 0.15 0.0028 0.16 0.0012 0.060 < 0.001 〇0.0024 0.21 0.24 0.18 0.0016 1.23 0.16 0.0018 0.055 < 0.001 P 0.0088 0.35 0.0011 0.35 0.0046 0.05 0.0031 < 0.001 < 0.001 Q 0.0082 0.34 0.0007 0.33 0.0040 -0.19 0.0019 < 0.001 < 0.001 R 0.0080 0.35 0.0011 0.33 0.0051 0.95 0.19 0.0018 < 0.001 < 0.001 This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -41-555863 A7 B7 V. Description of the invention ( 39) Table 5 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

No. Steel particle size (μιη) B50 (T) Wl5 / 50 (W / kg) YP (MPa) Punching diameter (mm) Punching diameter Max-min (μιη) Remarks 1 K 36.1 1.777 4.95 211 20.959 18 Compare Example 2 // 61.3 1.769 4.27 177 20.950 26 Comparative Example 3 L 26.5 1.789 5.57 283 20.982 8 Comparative Example 4 // 34.2 1.785 4.98 262 20.985 7 Invention Example 5 // 47.0 1.785 4.47 240 20.982 9 Invention Example 6 Μ 12.5 1.777 8.63 396 20.995 6 Comparative Example 7 // 35.2 1.774 4.88 294 20.991 8 Invention Example 8 11 70.2 1.768 4.06 250 20.992 9 Invention Example 9 Ν 28.7 1.786 5.38 289 20.990 8 Comparative Example 10 // 36.2 1.785 4.89 270 20.989 9 Invention Example 11 η 58.1 1.779 4.26 239 20.989 9 Invention Example 12 06.8 1.807 12.96 484 20.995 2 Comparative Example 13 // 22.7 1.803 5.28 329 20.992 2 Comparative Example 14 // 32.1 1.803 4.37 299 20.992 3 Invention Example 15 // 48.2 1.797 3.70 270 20.995 7 Invention Example 16 P 43.0 1.768 4.88 218 20.966 16 Comparative Example 17 // 60.4 1.766 4.50 197 20.959 18 Comparative Example 18 // 72.0 1.769 4.38 187 20.961 21 Comparative Example 19 Q 18.4 1.766 6.99 348 20.987 7 Comparative Example 20 // 44.8 1.766 4.7 6 273 20.977 8 Invention Example 21 // 75.1 1.775 4.29 243 20.984 8 Invention Example 22 R 22.6 1.778 5.07 359 20.990 4 Comparative Example 23 // 39.7 1.784 3.75 313 20.992 5 Invention Example 24 // 56.8 1.781 3.30 290 20.991 5 Invention Example This Paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling out this page) -42- 555863 A7 B7_ V. Description of Invention (40) [Example 3] The molten steel consisting of the steel F in Table 1, steel N in Table 4 and steel 0 was melted, and the plate thickness was made in the same manner as in Example 1. After the hot-rolled plate was 2 mm, the thickness was 1 1 0 0 °. After hot-rolled sheet of C 3 0 S is annealed, it is subjected to pickling and cold-rolled to a thickness of 0.50 to 0.20 mm. Then, the final refining annealing is performed at a temperature of more than 700 ° C and various temperatures in the single phase domain of the ferrous iron, and the recrystallization particle size is controlled to be between 3 5 and 4 5 μm. Next, a test piece coated with a semi-organic insulating film similar to that of Example 1 was prepared. For various tests. In these test strips, high-frequency iron loss at 400 Η z was also investigated. The results obtained are also recorded in Table 6 Table 6 (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

No. Steel Mark Plate Thickness (μιη) Particle Size (μιη) Β50 (Τ) Wl5 / 50 (W / kg) Wl 5/400 (W / kg) YP (MPa) Punching Diameter (mm) Punching Diameter Max- min (μιη) Remarks 1 F 0.50 38.2 1.807 4.84 171 217 20.968 14 Comparative Example 2 // 0.35 37.1 1.804 3.78 98 219 20.983 12 // 3 // 0.20 42.8 1.803 3.41 58 209 20.989 11 // 4 N 0.50 42.0 1.785 4.84 141 259 20.988 8 Invention Example 5 // 0.35 37.9 1.783 3.39 71 267 20.993 7 // 6 // 0.20 41.3 1.783 3.08 42 261 20.995 5 // 7 〇0.50 37.4 1.802 3.86 89 288 20.992 4 Invention Example 8 // 0.35 43.5 1.797 3.05 48 277 20.995 3 // 9 // 0.20 35.2 1.798 2.78 29 292 20.995 4 // This paper size applies to China National Standard (CNS) A4 specification (210 × 297 mm) -43- 555863 A7 B7 V. Description of the invention (41) ( (Please read the notes on the back before filling in this page.) As the thickness of the plate becomes thicker, especially the improvement of iron loss at high frequencies is significant. In addition, the die cutting dimensional accuracy also tends to improve as the thickness of the plate decreases. However, the steel N, which can satisfy the composition range of the present invention, is superior to the comparative steel F, and also lies in the steel of the present invention. Any thickness of the plate exhibits anisotropy of excellent punching dimensions. [Example 4] After melting in a laboratory, a molten steel having the composition shown in Table 7 was cast into a steel block, and then soaked at 1 150 ° CX for 1 hour, and then hot-rolled to a plate thickness. Flat piece of 30 mm. The obtained slab pieces were heated to the temperature (S R T) shown in Table 8 for 1 hour, then hot-rolled to 2.0 mm, and subjected to a treatment equivalent to a steel strip coil of 5 8 Otx for 1 hour, and allowed to cool. Then, except for a part of the steel, the hot-rolled sheet was annealed under the conditions shown in Table 8, and then cold-rolled to 0.50 mm after pickling. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs During cold rolling, the processability during cold rolling is evaluated by examining the condition of the plate during cold rolling and observing the cross-section structure after cold rolling. Steel (W, Z, a, c, d, K, and I) that has a high P (SO · 10%) and can not satisfy the composition range of the present invention, and the composition range can satisfy the composition range of the present invention, but the steel is flat When the heating temperature (SRT) or hot-rolling coiling temperature (CT) of the block (iron sheet for thin plate) leaves the scope of the present invention (No. 25, 26), the layered cracks parallel to the plate surface are observed. A part of the test piece (No. 5, 19, 25) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 乂 297 public ^ 1 1 ~ -44- 555863 Μ B7 V. Description of the invention (42) And it is separated into layers during rolling, and difficulties occur in the subsequent rolling. Under these conditions, industrially stable manufacturing is difficult. For these test pieces, subsequent processing and evaluation are not performed. The cold-rolled sheet is subjected to final refining annealing at a temperature of more than 700 ° C, and a coating film of a semi-organic insulating film similar to that in Example 1 is applied for various tests. Here, the film is loaded in parallel with the rolling direction. JIS No. 5 test piece was pulled out and pulled at a pulling speed of 10 mm / s to obtain the obtained tensile strength (T S) to evaluate the intensity, and write down the results obtained in Table 8 (please read the precautions on the back before filling out this page) Bureau of Intellectual Property, Ministry of Economic Affairs Standard (CNS) A4 specification (210X297 mm) -45- 555863 A7 B7

V. Description of the invention U3) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Industrial and Consumer Cooperatives, printed jishu khan Jianjie fruit μ η η ο Μ η ϋ 7; Μ 〇〇ο 2 ϋ ο ϋ 2 ϋ Μ Ο Ο Ο Ο Μ Ο 〇〇〇 〇〇Μ 〇O f) .26 ί Ο Ο ϋ ϋ 7 丨 ο ϋ ζ ϋ Ο 2 ϋ ϋ ϋ 2 ϋ 2 ο οο ο ο 〇〇〇〇ο ϋ 2 1591] D.593] ο Ό rS CSI Ον 3.585] 0.451 0.461 0.465 10.452 '0.283 0.274 0.300 0.242 0.252 -0.076 -0.092 -0.056 -0.055 -0.059 0.489 0.894 1.296 1.978 Da ^ P jl ο ο 〇 〇 〇 § § § § § gggg § § ggg < p (0.261丨 0.262 丨 0.266 < τ--Η CNJ 0.257 0.178 0.185 0.187, 0.179 1 0.080 0.074 0.090 0.056 0.061 -0.132 -0.142 -0.120 -0.120 -0.122 -0.122 0.146 0.261 0.351 0.525 < 0.001 丨 < 0.001 丨 < 0.001 丨 < 0.001 0.001 1 < 0 · 001 丨 0.023 '0.036 0.025, 0.032 0.002 < 0 · 001 < 0.001! ≪ 0.00! ≪ 0 · 001 0.035 0.036 0.034 0.032 0.032 0.035 0.022 0.021 0.021 0.026 < 0 · 001 < 0.001 < 0.001 _ < 0.001-< 0.001 · < 0.001 丨 < 0.001 < 0.001 < 0.0 01 0.018 0.022 0.023 0.019 0.022 < 0.001 0.002 < 0.001 < 0.001 < 0.001 < 0 001 0.002 < 0.001 < 0.001 2 bearing 0.0022 0.0032 0.0015 _ 0.0018 0.0021 0.0018 0.0020 0.0022 0.0020 0.0019 丨 0.0012 0.0031 0.0026 0.0014 0.0018 0.0022 0.0021 0.0035 0.0028 0.0026 0.0021 0.0019 0.0025 pH ^ 0.05 0.13 0.19 0.26 0.29 0.04 0.15 〇0.25 10.04 0.12 0.17 ΟΝ Ο 0.25 0.03 0.13 ΟΝ Ο 0.24 0.29 0.18 0.16 0.17 0.19 2 ^ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100 0.00 0.00 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 1.09 1.57 2.13 CO ^ 0.0041 CO s ο < ό 0.0028 0.0032 '0.0041 0.0032' 0.0032 0.0032 0.0032 丨 0.0050 1 0.0041 1 0.0028 0.0019 0.0032 0.0008 0.0004 0.0013 0.0017 0.0023 0.0032 0.0015 0.0032 0.0022 fH οο CD ON ο 0.22 οο 〇σ \ 5 as o 0.21 ΟΝ Ξ 0.18 0.20 | 0.19 0.22 0.18 0.18 0.20 0.18 0.18 0.19 0.22 0.20 0.19 0.19 0.21 0.0010 0.0011 0.0006 0.0005 0.0006 0.0006 0.0010 0.00 0.00 \ 0.0011 0.0004 0.0006 0.0009 0.0009 0.004 0.0008 0.0007 0.0006 0.25 0.26 0.25 10.27 0.27 0.0010 0.0005 0.0010 0.0006 0.60 0.60 0.60 0.60 0.63 s τ—H 〇r—H 0.98 ο τ—Η CNl un 11.54 1 1.48 1.63 1.60 οο 2.20 τ—Η csi 2.08 r ..... i csi Η M5j 1.56 rH 10.0018 1 0.0011 0.0014 0.0032 0.0031 1 0.0011 0.0011 0.0011 0.0011 0.0011 0.0019 10.0025 1 0.0016 0.0018 0.0024 0.0008 0.0011 0.0016 0.0017 0.0024 10.0026 1 0.0033 0.0036 oo S oo Steel composition ______1 Comparative steel Micro invention steel Invention steel addiction jj -U Comparative steel m & < Μ Μ Μ : 丨 丨 Comparative steel 1 Xinjiang jj Invented steel ML 镒 AJ J-Λ Invented steel 『Invented steel Xia-LA 镒 AJ Invented steel M! M 镪 翳 £ 00 ㈡ ㈡ > X Ν 〇ο CD λ • fH f—Η S ο Α4 S Ν C / V

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、 1T 555863 A7 B7 V. Description of the invention (# 4) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

00 Pf < 6726 g ϋ ggogigggggggggggggg £ 0.591: 1593] 1600] 1592] 0.585] 0.451: 0.461: 3.465] D.452] 0.283 0.274 0.300 0.242 0.252 -0.076 -0.092 -0.056 -0.055 -0.059 0.489 0.894 1.296 1.978 0.461 1.461 1.461 Pa ^ P ooon 〇ggg 〇 〇 ggggggg § gggg § 3.261 i 3.262 (3.266 (1261 (1257) 0.178 0.185 1187] 1179] 0.080 0.074 10.090 0.056 0.061 -0.132 -0.142 -0.120 -0.120 -0.122 -0.122 0.146 0.261 0.351 0.525 0.185 0.185 0.185 mm π direction. OO 〇〇 幽 〇 〇 〇 _ 〇〇〇〇〇〇〇M «4 < ifiS) 4 < 〇〇〇〇 Lion Wr 4 < total 3¾ _ 3¾ difficult 1¾ 15 _ _ punching diameter max -min: μη〇VO VO ir \ Csl ir ^ ITi rH II inch CO rH »r ^ CO CO 1 1 CO inch 1 1 ε ^ 0.969 \ Z0.988: 20.991 (20.993; 20.9681 20.9921: 20.9741 1 1 120.9931 20.992 120.990 20.995 20.996 20.994 1 1 20.996 20.995 20.996 〇 On On 1-〇〇οα oo CO 410: ON ο cn inch 400: 1 1 1470 1 494 444 as et as 〇CO 1 1 wo inch CO 00 inch l / n 〇 > VD r—H inch 1 1 ΥΡ: MPa) < O 'CN / *-0 o VO / ^ vl VD OO ΚΓ) IT) rsi ON rsi t—t ON csl 1 1 ο cn CO 00 CO 〇〇CO CO C < I 00 CO 0 0 ON ^ ~~ 1 1 1 CO CO OJ CO CO 00 CO cs rH CO 1 1 B50: T) < L.775: L774: 1.776: r- 1.762: 1.764 CO cn 1 1 | 1.735 1.733 1.703 1.708 1.709 1.704 1 1 1.742 L748 r—HI / O 1.75 of 1 1 Hot rolled sheet. Annealing temperature < tiC) ogog 〇o ο 〇§ ο Tsuk 900 900 oo ο ο ο ο 〇2 1100! 11000 11000 11000 11000 1000 11100 1100 1100 1100 壊 550 1700 Also I f ^ \ o CNl DOWN 1-^^ o ο < r ^ O 1 / ^ o un ir ^ un ο ΐΓί 〇1 / Ί m 0 ID ur > 1580 '0 〇〇IT) 〇〇〇IT ·) 〇〇〇00 00 IT) 0 wn τ · > 1 / Ί un ο wo 0 0 rH ISRT i (C. <) __ 〇ID oooo IT) 〇〇o 〇〇yD Ο ο ID 〇wr > 〇ir > 11150 11150 1150 丨 1150 11150 11150 1150 11150 11150 11100 1250 I__ m. aJ r A ^ s plastic m vine m 骊 m (3 mmm > 镒 m 镒 镒 密 备 λλ χ χ 薇 m 镒 J_J ± Λ W AJ ^ 1Λ N u AJ J-Λ MI < i ^ Iron J_J ΑΛ csi J_J JA 匿 JJ ΑΛ Γ) Win λα W : Iron 〇J-Λ Jiang-am (〇 HP HP fnr, mf 1 ^ * = n Μ: imm • i-Η m 覉 s change ms: mcm device m 〇mmimm device U port CA2 L ^ cs CO inch ΙΟ V £ > oo ON ο rH CNl cn inch iD v £) 〇〇〇V CNl r < i CO csi ID CNl VO CO I-(Please read the notes on the back before filling this page) Order 555863 A7 B7____ V. Description of the invention (45) As a component of the scope of the present invention, in particular steel (No. 2 ~ 4, 7, 13, 14, 16 ~ added with P 0.1% or more) (Please read the precautions on the back before filling in this (Pages) 1 8 and 2 1 to 2 4) Both show excellent punching dimensional accuracy. Details ... The punching diameter in steels (No. 1, 6, 10 and 15) where the P addition amount is less than 0.1% has a tendency to improve as the amount of Si + A 1 increases, but Punching diameter is very different in different directions. On the other hand, it is apparent that the steel of the present invention is excellent in the directional anisotropy of the punching diameter and the punching diameter. In addition, these invention steels have high strength and high magnetic flux density even though they have a P content less than 0.1% compared to steel, and they have excellent strength-magnetic flux density balance. [Example 5] The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed a laboratory melting steel of Table M, Steel N and Steel as shown in Table 4, and after casting, it was made by hot rolling. Plate thickness: 30mm flat steel sheet. After heating at the respective temperatures (SRT) shown in Table 9 for 60 minutes, it was hot-rolled to a sheet thickness of 2 mm, and at the temperatures (CT) shown in Table 9, the equivalent of coiling of steel strip was performed. After the heat was maintained for 1 hour, it was allowed to cool. Then, except for a part of the steel, a hot-rolled sheet annealing was performed at a temperature shown in Table 9 for 60 seconds. The obtained hot-rolled steel sheet was subjected to a bending test at room temperature (2 3 ° C). The bending test was performed by taking a test piece of 100 mm x 30 mm from the hot-rolled plate with the rolling direction becoming the long axis direction in accordance with JISC. A repeated bending test with a bending radius of 15 mm was carried out at 2 5 50, and the number of times (bending) that cracks occurred on the surface of the hot-rolled sheet was shown. 1 Paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -48- 555863 A7 B7 V. Description of invention (46) Furthermore, the following method is used to investigate the hot rolled steel sheet annealing during the heating of steel slabs. Organization (phase). Both the steel slab and the hot-rolled sheet are maintained at a predetermined temperature (described in Table 9) for a predetermined time (steel slab heating: 1 hour, annealing: 60 seconds), and then the structure at the time of freezing and heating is given by water quenching Phase alignment was achieved by microscopic observation of the tissue. The results are also recorded in Table 9 ° After the above hot-rolled sheet was pickled, cold rolling was performed to a thickness of 0.50 mm (1 cold rolling), and the presence or absence of cooling caused by embrittlement was evaluated. Poor rolling (layer cracking). For the cold-rolled sheet having no layered cracks, that is, the final refining annealing was performed at various temperatures shown in Table 9, and then a semi-organic insulating film similar to that in Example 1 was applied, and test pieces were prepared for various tests. The results are shown in Table 9. * I ---------- Clothing-(Please read the precautions on the back before filling this page)

、 1T Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives This paper is printed in accordance with the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -49- 555863 A7 B7 Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 1 in 〇〇〇〇〇〇CS1 1 〇〇〇〇OQ CSI 荠 VO CO 〇ON CN1 〇〇C < 1 oo On CNl On OO CvJ 〇 ^ S3 rH CO CO CO VD cn oo CO CO r-HS 〇 rH 1 1 MD PQ C ig CN1 < 〇CN1 s VO CO oo VO VO r- r ^ · t—H CO CO CO CO 1 τ—Η rH 1 Γ-; Η ι < ir ^ rH tr ^ r-H t-H! > t-H 1 CSI match CNl 〇6 cn 1 Η CM U ^) oo cn un r-H cs wo § r-H ^ £ 5 cn UO 〇6 cn 〇q CO oo MD cn final Refining annealing temperature (C.) 1 ο οο ο οο 1 〇〇〇〇oo oo oo o oo o 8 oo 〇〇〇oo oo 〇oo Miscellaneous κπ It i5 〇〇i5 vertical hot rolled plate Turning times οο CN1 ι〇CO CNl CNl CNl CO CO o o CSI nn Blood ^ T- nn nn rm ^-V. ΠΉ 4 ^-^ ^ Μ 酹 gt + 酹 酹 g | + □ m | nttir 1 1 1 1 m m- ^ \ j 蹓 蹓 S 壊 壊 壊ON8 ON 8 as s ON 〇 \ < 〇σ \ 8 Η τ—Η ο ο Η 8 On 〇OO u U l / Ί l〇un 〇 > VsD to 8 to S ο S > y ^ ΠΠΠΠ ΠΉ 4 ^ τ ΠΉ Blood nm ΙΙΠ nzr ΠΕΠ ΠΉ tm 4 ^ r · ΠΉ Position + g | U + 酹 酹 gffif 酹 酹 SBf □ ml 翳 越 继 卜卜 _ U C0 Η τ—Η Ο S y --I σ > τ-Ή rH r—HH rH rH rH Ο τ—Η ν Η Ο ι < V " < 〇r " Ή τ—Η 〇H rH m镒 _ J-Λ Sparkling ± Λ JJ m Sparkling Sparkling JJ ^ LA Hidden ML Hidden Hidden Hidden ML < M Jiang Medun m Slightly sparked Slightly m Sparked Singing 翳 2 SSS 2 2 2 〇〇〇〇〇 CN1 cn inch iD VO 〇〇On 〇1 i rH CN r—H CO \ 4 ------------ (Please Read the notes on the back and then fill out this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) _ f 〇—,-555863 A7 B7 V. Description of the invention (48 ^ (Please read the Note: Please fill in this page again.) In the steel composition (low Si steel) of the present invention, when the manufacturing conditions of the present invention are satisfied, (N 0.2, 3, 6, 8, 10, and 1 1) is A steel plate that is high in P is produced without problems, and its properties are also good. On the other hand, when the steel slab (iron sheet for sheet metal) of the present invention is in the two-phase domain (No. 1 and 4), it is found that cold rolling defects due to embrittlement are liable to occur. This makes it difficult to make products. When the coiling temperature of the steel strip coil is higher than 650 t: (N 0 · 5), the workability of the hot-rolled sheet is reduced and the iron loss of the electromagnetic steel sheet obtained is not good. Also, when the annealing temperature of the hot-rolled sheet becomes a two-phase domain (No. 7 and No. 12), and when the amount of Ni is more than 1.0 mass%, the hot-rolled sheet annealing is performed in the α single-phase domain. (N ο · 1 3) is a decrease in the magnetic flux density of the obtained electromagnetic steel sheet. In addition, the final refining annealing temperature deviates from the manufacturing conditions of the present invention, and the magnetic properties are also deteriorated when the recrystallization particle size is not more than 30 μm (N 0.9). Utilization possibilities in the printing industry for employees ’cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs In short, according to the present invention, excellent magnetic characteristics with high magnetic flux density and low iron loss can be obtained stably, and high punching Non-oriented electromagnetic steel sheet with dimensional accuracy, and non-oriented electromagnetic steel sheet with high strength. In addition, the non-directional electromagnetic steel sheet of the present invention is most suitable for iron core blanks of various motors. Among them, it is most suitable for particularly required to have a high paper size. Applicable to China National Standard (CNS) A4 specification (210X297 mm). ) -51-555863 A7 B7 V. Description of the invention (49) (Please read the precautions on the back before filling this page) Dimensional accuracy and high magnetic flux density of the reactance motor, and the embedded magnet type that requires the strength of the blank material DC brushless motors are the most suitable materials. Brief Description of the Drawings Fig. 1 is a graph showing the effect of the Si content and the P content on the relationship between the drop strength and the punching diameter. Fig. 2 is a graph showing the influence of the si content and the P content on the relationship between the drop strength and the anisotropy of the punching direction. Fig. 3 is a graph showing the effect of the Si content and the P content on the relationship between the average crystal grain size and the punching diameter. Fig. 4 is a graph showing the effect of the Si content and the P content on the relationship between the average crystal grain size and the punching anisotropy. Fig. 5 is a graph showing the effect of the Si content and the P content on the relationship between the average crystal grain size and the iron loss. Fig. 6 is a graph showing the effect of the Si content and the P content on the relationship between the average crystal grain size and the magnetic flux density. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 8 Industrial Consumer Cooperatives. Figure 7 is a graph showing the effect of Si content and P content on the relationship between iron loss and magnetic flux density. Fig. 8 is a graph showing the effect of the Si content and the P content on the occurrence of lamellar cracking. Fig. 9 is a graph showing the effect of the Si content and the Ni content on the occurrence of lamellar cracking. Fig. 10 shows the content of si and the addition of Ni. For the content of P and the size of the paper, the Chinese national standard (CNS) A4 (210X297 mm) is applicable. -52- 555863 A7 B7 5. Description of the invention (50) And the quantity contains P in addition to • 1 N. Add pictures and lines. The line of the imitated curve i, the rhyme S, the display of the shadow, is the one of the first one of the shadow map. Chart 2 ο 1 Figure No. 2 Figure No. 1 Figure No. 2 Figure No. 4 Figure No. 2 Figure No. 2 Figure No. 4 Figure No. 2 Figure No. 4 (Please read the notes on the back and fill in this page) The paper size printed by the Ministry of Economic Affairs, Chi Tzu Choi / $ Bureau Consumer Cooperatives applies the Chinese National Standard (CNS) Α4 specification (210 × 297 mm) -53-

Claims (1)

555863 A8 B8 C8 D8, scope of patent application 1 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1. 丨 ~ ^^ M directional electromagnetic steels have: C converted by mass percentage C: 0 0 • 〇 1 0% S] [ With at least one of A 1 0 • 5% or less f M r 1: 0 • 5% or less JP:: 0 • 10% or more y 0 s:: 0 Hua 0 1 5% or less 9 N:: 0 • 0 Less than 10% y The rest is F e and the unavoidable average crystal grain size is more than 30 μm 2. As mentioned in the first patent claim, this steel sheet is also included; the total percentage of S b and S η is 0 when converted. 4 3. If the patent claims the scope of the patent No. 15 of which the steel plate also contains: Ν i its system 2. [3% or less 0 4 • If the patent scope of the patent No. 1 where the steel plate contains at least the following mass percentage conversion 5 series C 〔0 • 0 1% or less B: 0 • 0 0 5% or less y C] r: 0 • 1% or less 9 C i λ · 0 1% or less 9 This paper uses the Chinese National Standard (CNS) A4 (210X297 mm) board, which is characterized by: When it contains: Species, total 0 · 0 3% or more '• 26% or less; The composition is '80 μm or less. The non-oriented electrical steel sheet according to the item, at least one of which has a content of not more than 0% by mass. Or when the content of the non-oriented electromagnetic steel sheet of 2 items is converted by mass percentage, or one of the elements of the non-oriented electrical steel sheet of 2 items, the element is (Please read the precautions on the back before filling this page) 555863 A8 B8 C8 —______ 6. The scope of patent application is 2 Μ 0: 0.1% or less. (Please read the precautions on the back before filling out this page) 5. If the non-oriented electromagnetic steel sheet of item 1 or 2 of the scope of patent application ’, the thickness of the steel sheet is 0.35 mm or less. 6 · —A non-oriented electromagnetic steel plate, characterized in that: When converted by mass percentage, it includes: c: 0 to 0.010%; at least one of S i and A 1 in total, 0 · 5% or more, 2 5% or less; Mn: 0.5% or less; P: 0.1% or more and 0.26% or less; S: 0.015% or less; NR: 0 _ 01〇% or less; and Ni as required : 2.3% or less; The rest are components composed of Fe and unavoidable impurities, and are less than one of the relational expressions of PSPA and PFS0.2 6, and pA = -0.2 Si + 0.21Mn-〇. 32A1 + Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 〇05Ni2 + 〇.10Ni + 〇.36-(1) =-〇 · 34Si + 〇. 20Mn- 〇. 54A1 + 〇.24Ni2 + 〇.28Ni + 〇.76 -(2) Here, the unit of each element content is mass percentage. 7 · If the non-oriented electrical steel sheet according to item 6 of the patent application scope, wherein the steel sheet also contains at least one of S b and S η, the content of which is equal to or less than 40% when converted by mass percentage. This paper size is applicable to China National Standard (CNS) A4 specification (210 × 297 mm) 555863 A8 B8 C8 _____ D8 VI. Scope of patent application 3 (Please read the notes on the back before filling this page) 8. The non-oriented electrical steel sheet of item 6 or 7, wherein the steel sheet contains at least one of the following elements. When the element is converted by mass percentage, it is C 8 〖: 0 · 0 1% or less B: 0. 0 0 5% The following CI.: 0. 1% or less. 7 C i .. · 0. 1% or less. JM c): 0. 1% or less. 09. A method for manufacturing a non-oriented electrical steel sheet, which is characterized by: The steel sheet for a sheet having the composition described in any one of claims 1 to 4 has a heating temperature in the single-phase field of Vosstian Iron and the coiling temperature of the steel strip coil is lower than 6 Perform hot rolling treatment at a temperature below 50 ° C, and then perform descaling treatment, and then perform cold rolling treatment once or 2 or more times including intermediate annealing treatment. Single-phase domains of ferrous iron above 0 0 ° C , Final finish annealing process. 1 0 · —A method for manufacturing non-oriented electromagnetic steel plate, characterized in that it is printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs for the components described in any one of the scope of patent applications 1 to 4 The steel sheet for sheet metal is hot-rolled under the condition that the heating temperature is within the single-phase area of Vosstian Iron and the coiling temperature of the steel strip is lower than 6 50 ° C. If Ni is not added or The content of Ni is less than 1.0. The quality of this paper is only used in China National Standards (CNS) 8 4 specifications (210X297 mm) "-Price 555863 A8 B8 C8 D8 6. Application for patent scope 4 (please listen first (Please read the notes on the back and fill in this page again.) The percentage is in the single-phase area of ferrous iron above 900 ° C, or in the single-phase area of Vostian Iron above 3 c Annealed the hot-rolled steel sheet; if the content of Ni is more than 1.0% by mass and less than 2.3% by mass, heat is applied in the single-phase area of Vosstian Iron at 3 or above A c Rolled steel sheet annealing treatment; next After descaling, cold rolling is performed once or twice or more, including intermediate annealing, and then the final refined annealing is performed in a single-phase region of ferrous iron having a temperature of more than 700 ° C. deal with. 1 1 · A method for manufacturing a non-oriented electrical steel sheet, characterized in that it is directed to a steel sheet for a sheet having a composition as described in any one of items 6 to 8 of the scope of patent application, and the heating temperature is 1 After 0 0 0 ~ 1 2 0 0 t and the coiling temperature of the steel strip coil is below 6 5 0 t, the hot-rolled steel sheet is annealed according to the needs after the hot-rolling treatment; Printing by Consumer Cooperatives Next, after the descaling treatment is performed, the cold rolling treatment is performed once or twice or more, including the intermediate annealing treatment, and then the final refining annealing treatment is performed. This paper size applies to China National Standard (CNS) A4 (210X297 mm)