Amorphous alloy thin strip

Abstract

To provide an amorphous alloy strip that can reduce core loss when used as the core of a saturable reactor. [Solution] The composition of the amorphous alloy thin strip is represented by the following formula (1). X, represented by the following formula (2), is 40 or less. Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f (In equation (1) above, the units of a, b, c, d, e, and f are atomic percent. The values ​​of a, b, c, d, e, and f are as follows: 0.0 ≤ a ≤ 5.0, 0.0 ≤ b ≤ 4.5, 2.6 ≤ c ≤ 4.4, 13.0 ≤ d ≤ 15.5, 8.0 ≤ e ≤ 15.0, 0.0 ≤ f ≤ 5.0). Equation (2) X = {(100 - abc) * 1.715 + b * 2.219 + f * 0.604 + a * 1.2} / c.

Description

Technical Field

[0001] The present disclosure relates to an amorphous alloy ribbon.

Background Art

[0002] Devices such as pulse power supplies are provided with magnetic switches. Saturable reactors are used as the magnetic switches. A saturable reactor includes a core and a conductive wire wound around the core. An amorphous alloy ribbon is used as the core of the saturable reactor. Such an amorphous alloy ribbon is disclosed in Patent Document 1.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of Invention

Problem to be Solved by the Invention

[0004] The core of a saturable reactor is required to have low core loss. In one aspect of the present disclosure, it is preferable to provide an amorphous alloy ribbon that can reduce core loss when formed into a core of a saturable reactor.

Means for Solving the Problem

[0005] One aspect of the present disclosure is an amorphous alloy ribbon whose composition is represented by the following formula (1), and X represented by the following formula (2) is 40 or less. Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f (In the above formula (1), the units of a, b, c, d, e, and f are atomic%. The values of a, b, c, d, e, and f are as follows: 0.0≦a≦5.0, 0.0≦b≦4.5, 2.6≦c≦4.4, 13.0≦d≦15.5, 8.0≦e≦15.0, 0.0≦f≦5.0) Formula (2) X={(100-a-b-c)*1.715+b*2.219+f*0.604+a*1.2} / c The amorphous alloy ribbon, which is one aspect of the present disclosure, can reduce core loss when used as the core of a saturable reactor. [Mode for Carrying Out the Invention]

[0006] Exemplary embodiments of the present disclosure will be described. 1. Configuration of Amorphous Alloy Ribbon The composition of the amorphous alloy ribbon is represented by the following formula (1). Formula (1) Co 100-a-b-c-d-e-f Mn a Fe b Mo c Si d B e Ni f

[0007] In formula (1), the units of a, b, c, d, e, and f are atomic%. In formula (1), the values of a, b, c, d, d, e, and f are respectively as follows.

[0008] 0.0≦a≦5.0 0.0≦b≦4.5 2.6≦c≦4.4 13.0≦d≦15.5 8.0≦e≦15.0 0.0≦f≦5.0

[0009] The value of a is, for example, 4 or less, and for example, 3.7 or less. The value of b is, for example, 4 or less, and for example, 3.6 or less. The value of b is, for example, 1 or more, and for example, 1.2 or more. The value of c is, for example, 4 or less, and for example, 3.7 or less. The value of d is, for example, 13.5 or more. The value of e is, for example, 14.5 or less, and for example, 14 or less. The value of f is, for example, 3 or less, and for example, 1.5 or less.

[0010] In amorphous alloy thin strips, the magnetostriction can be adjusted by controlling the amount of Mn. In amorphous alloy thin strips, the Curie temperature T can be controlled by suppressing the amount of Mn. c The Curie temperature can be increased. c When the value is high, the following effects are produced.

[0011] Let's consider the case where an amorphous alloy strip is used to manufacture the core of a saturable reactor. The Curie temperature T of the amorphous alloy strip. c If the saturable reactor is high, it will function as a magnetic switch even at high temperatures.

[0012] In the composition of amorphous alloy thin strips, by suppressing the amount of Fe, the saturation magnetic flux density B s This can be suppressed. In the composition of amorphous alloy thin strips, increasing the amount of Mo can suppress the saturation magnetic flux density B s This can suppress [the following]. Furthermore, by suppressing the amount of Mo in the composition of the amorphous alloy strip, the aspect ratio can be increased. A aspect ratio of 0.6 or higher is preferable. A high aspect ratio provides the following effects.

[0013] Let's consider the case where a core for a saturable reactor is manufactured using an amorphous alloy strip. A higher square-to-square ratio improves the responsiveness of a magnetic switch made of a saturable reactor to changes in magnetic flux.

[0014] Furthermore, by suppressing the amount of Mo in the composition of amorphous alloy strips, the Curie temperature T cThis can increase the casting efficiency. Furthermore, by suppressing the amount of Mo, the difficulty of casting amorphous alloy strips can be reduced. Note that high casting difficulty refers to the fact that when the alloy is melted and placed on the cooling roll, the alloy oxidizes easily and burns easily, or it is difficult to form a ribbon shape.

[0015] In amorphous alloy strips, soft magnetism can be adjusted by controlling the amount of Si. Soft magnetism refers to coercivity and loss. By suppressing the amount of Si, the Curie temperature T can be controlled. c This allows us to increase the aspect ratio.

[0016] In the composition of amorphous alloy strips, increasing the amount of B increases the amorphous formation ability. Increased amorphous formation ability makes it more difficult for crystals to precipitate in the amorphous alloy strips. Magnetostriction can be adjusted by controlling the amount of Ni in the composition of amorphous alloy strips. By reducing the amount of Ni, the manufacturing cost of amorphous alloy strips can be reduced.

[0017] The composition of the amorphous alloy strip may be obtained by substituting Mo with element E1 in formula (1). E1 is Nb, W, or Ta. The composition of the amorphous alloy strip may be obtained by substituting Mn with element E2 in formula (1). E2 is V or Cr. The composition of the amorphous alloy strip may be obtained by substituting Mo with element E1 and Mn with element E2 in formula (1).

[0018] In an amorphous alloy thin strip, X, represented by the following formula (2), is 40 or less. Formula (2)X={(100-abc)*1.715+b*2.219+f*0.60 4 + a * 1.2 / c In equation (2), "*" is the multiplication operator. When the value of c is 0, the value of X is assumed to be greater than 40. Factors that affect the value of X include the amount of Co, Fe, Ni, Mn, and Mo added. The less Co, Fe, Ni, and Mn added, the smaller X becomes. The more Mo added, the smaller X becomes. When the value of X is 40 or less, core loss can be reduced when a core of a saturable reactor is manufactured using the amorphous alloy strip of this disclosure.

[0019] In equation (2), 1.715 is the magnetic moment of Co. In equation (2), 2.219 is the magnetic moment of Fe. In equation (2), 0.604 is the magnetic moment of Ni. In equation (2), 1.2 is the magnetic moment of Mn. The reason why core loss can be reduced when X is 40 or less is presumed to be as follows: By reducing the magnetic moment, energy consumption in the magnetization and demagnetization processes is suppressed, and hysteresis loss is reduced. The induction of eddy currents is suppressed, and eddy current loss is also reduced. As a result, core loss can be reduced.

[0020] The magnetic flux density of an amorphous alloy thin strip when magnetized with a magnetic field of 80 A / m is given by B. 80 Let's assume that. B 80 This corresponds to the saturation magnetic flux density. 80 It is preferable that it is 0.6T or less. 80 When the thickness is 0.6T or less, core loss can be reduced when using an amorphous alloy core. 80 It is preferable that it is 0.3T or higher. 80 If the thickness is 0.3T or greater, the amorphous alloy core can be miniaturized. 80 Factors that influence this include the amount of Co, Fe, Ni, Mn, and Mo added. The less Co, Fe, Ni, and Mn added, the lower B 80 It becomes smaller. The more Mo is added, the smaller B becomes. 80 It becomes smaller.

[0021] Curie temperature T of amorphous alloy thin strip cIt is preferable that the Curie temperature is 145°C or higher. In the composition of the amorphous alloy thin strip, by suppressing the amount of one or more of Mn, Mo, and Si, the Curie temperature T c It can be increased.

[0022] The thickness of the amorphous alloy strip is preferably 18 μm or less. When the thickness of the amorphous alloy strip is 18 μm or less, the core loss (eddy current loss) when used as an amorphous alloy core can be reduced.

[0023] The angularity ratio of amorphous alloy strips is preferably 0.6 or higher. Factors that affect the angularity ratio include the amount of Mo and Si added, and magnetostriction. The less Mo and Si added, the higher the angularity ratio. The less magnetostriction, the higher the angularity ratio.

[0024] 2. Method for manufacturing amorphous alloy strips Amorphous alloy strips can be manufactured, for example, by the following method: A molten alloy whose composition is represented by formula (1) is rapidly cooled by a single-roll method. In the single-roll method, the molten alloy is sprayed onto the surface of a rotating cooling roll. The molten metal is rapidly cooled on the surface of the cooling roll, forming a long amorphous alloy strip. An example of the single-roll method is the method disclosed in Japanese Patent Publication No. 6160784.

[0025] 3. Method for manufacturing amorphous alloy cores Amorphous alloy cores are formed by laminating amorphous alloy strips. Amorphous alloy cores can be manufactured using amorphous alloy strips. One method for manufacturing amorphous alloy cores is to wind a long amorphous alloy strip. In this case, the inner diameter of the amorphous alloy core is, for example, between 2 mm and 100 mm. The outer diameter of the amorphous alloy core is, for example, between 5 mm and 300 mm.

[0026] The manufactured amorphous alloy core has the same magnetic properties as the amorphous alloy strip used in its manufacture. The core loss of the amorphous alloy core is 5000 kW / m 3The following is preferable. Factors that affect core loss include the amount of Co, Fe, Ni, Mn, and Mo added, and the thickness of the amorphous alloy strip. The less Co, Fe, Ni, and Mn added, the smaller the core loss (hysteresis loss and eddy current loss). The more Mo added, the smaller the core loss (hysteresis loss and eddy current loss). Also, the smaller the thickness of the amorphous alloy strip, the smaller the core loss (eddy current loss).

[0027] Amorphous alloy core B 80 It is preferable that the Curie temperature of the amorphous alloy core is 0.6T or less. c The temperature is preferably 145°C or higher. The angularity ratio of the amorphous alloy core is preferably 0.6 or higher.

[0028] For example, the manufactured amorphous alloy core can be used as the core of a saturable reactor. The saturable reactor can be used, for example, as a magnetic switch. A magnetic switch is a component of a device such as a pulse power supply.

[0029] 4. Effects of amorphous alloy strips (1A) When the core of a saturable reactor is manufactured using the amorphous alloy strip of this disclosure, core loss can be reduced. (1B) In the amorphous alloy strip of the present disclosure, B 80 It is within a suitable range. A suitable range is, for example, a range of 0.6T or less. (1C) In the amorphous alloy strip of this disclosure, the Curie temperature T c It's expensive.

[0030] 5. Examples (1) Manufacturing of amorphous alloy strips Amorphous alloy strips S1 to S10 were produced by rapidly cooling molten alloys having the compositions listed in the "Composition" column of Table 1 using the single-roll method. Table 1 shows the values ​​of X for S1 to S10.

[0031] [Table 1]

[0032] The amorphous alloy strips S1-S10 were ribbon-shaped. The width and thickness of the ribbon-shaped strips are shown in Table 1. For S6 and S8-S10, strips with a thickness of 18 μm and strips with a thickness of 14 μm were manufactured, respectively.

[0033] (2) Manufacturing of amorphous alloy cores Amorphous alloy cores were manufactured for each of the amorphous alloy strips S1 to S10. The method for manufacturing the amorphous alloy cores was to wind a long amorphous alloy strip. The inner diameter of the amorphous alloy core was 10 mm. The outer diameter of the amorphous alloy core was 13 mm. The amorphous alloy core was made up of laminated amorphous alloy strips.

[0034] The manufactured amorphous alloy cores were subjected to heat treatment. The heat treatment conditions are as shown in Table 2. During the heat treatment, the magnetic field described in the "Applied Magnetic Field" column of Table 2 was applied. During the heat treatment, the highest temperature in the temperature profile was the temperature described in the "Heat Treatment Temperature" column of Table 2.

[0035] (3) Evaluation of amorphous alloy cores After heat treatment, for each amorphous alloy core, B 80 , residual magnetization B r Curie temperature T c The aspect ratio and core loss were measured. 80 , and remanent magnetization B r The measurement was performed by wrapping a wire around an amorphous alloy core and passing a direct current through the wire.

[0036] Curie temperature T c The measurement was performed as follows: The amorphous alloy core was placed in an oven. The temperature inside the oven was set to a predetermined value, and the B of the amorphous alloy core was measured. 80 Measure the temperature. Repeat this process while gradually increasing the temperature inside the oven. B80 The temperature inside the oven when the temperature becomes 0T is called the Curie temperature T. c Let's assume that.

[0037] An ACBH device (Iwasaki Communication Equipment Co., Ltd. BH analyzer SY-8218) was used to measure core loss. The frequency used for core loss measurement was 100 kHz, and the applied magnetic field strength was 200 A / m. The evaluation results are shown in Table 2.

[0038] [Table 2]

[0039] Core loss was low in S6, S9, and S10. Also, in S6, S9, and S10, B 80 The value was 0.6T or less. Also, in S6, S9, and S10, the Curie temperature T c The ratio was high. Also, the aspect ratio was large in S6 and S10.

[0040] In S1, core loss was large. This is because the amount of Mo contained in the amorphous alloy thin strip S1 was insufficient, and the value of X was excessive.

[0041] In S2, B 80 The value exceeded 0.6T, indicating significant core loss. This is because the amount of Fe contained in the amorphous alloy thin strip S2 is excessive, resulting in an excessively large value of X.

[0042] Core loss was large in S3-S4. This is because the value of X in amorphous alloy thin strips S3-S4 is excessive. In S5, B 80 The coefficient of variation (X) was large, resulting in significant core loss. This is because the amount of Mo contained in the amorphous alloy thin strip S5 was insufficient, while the value of X was excessive.

[0043] In S7, the Curie temperature T cThe X value was low, and the squareness ratio was small. This is because the amount of Mo contained in the amorphous alloy thin strip S7 was excessive. In S8, the core loss was large. This is because the amount of Mo contained in the amorphous alloy thin strip S8 was insufficient, and the X value was excessive.

[0044] 6. Other Embodiments Although embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments described above and can be implemented in various modified forms.

[0045] (1) Amorphous alloy strips may be used for purposes other than the core of a saturable reactor. For example, amorphous alloy strips can be used as part of the circuitry of a device. Examples of such devices include switching power supplies and laser power supplies. Amorphous alloy strips can also be used in noise absorbers, common mode chokes for switching power supplies, magnetic heads, magnetic sensors, etc.

[0046] (2) The function of one component in each of the above embodiments may be divided among multiple components, or the function of multiple components may be performed by one component. Also, some of the configurations of each of the above embodiments may be omitted. Also, at least some of the configurations of each of the above embodiments may be added to, replaced with, etc., the configurations of other embodiments.

[0047] (3) In addition to the amorphous alloy strip described above, this disclosure can also be realized in various forms, such as a system using the amorphous alloy strip as a component, an amorphous alloy core, a pulse power supply, a method for manufacturing the amorphous alloy strip, a method for manufacturing the amorphous alloy core, etc.

[0048] [Technical Concept Disclosed in This Specified Specification] [Item 1] The composition is represented by the following formula (1), X, expressed by the following formula (2), is 40 or less. Amorphous alloy thin strip. Formula (1) Co 100-a-b-c-d-e-f Mna Fe b Mo c Si d B e Ni f (In equation (1) above, the units of a, b, c, d, e, and f are atomic percent. The values ​​of a, b, c, d, e, and f are as follows: 0.0 ≤ a ≤ 5.0, 0.0 ≤ b ≤ 4.5, 2.6 ≤ c ≤ 4.4, 13.0 ≤ d ≤ 15.5, 8.0 ≤ e ≤ 15.0, 0.0 ≤ f ≤ 5.) 0) Formula (2)X={(100-abc)*1.715+b*2.219+f*0.604+a*1.2} / c [Item 2] Amorphous alloy strip as described in item 1, Magnetic flux density B when magnetized by a magnetic field of 80 A / m 80 is 0.6T or less. Amorphous alloy thin strip. [Item 3] Amorphous alloy strip as described in item 1 or 2, The Curie temperature is 145°C or higher. Amorphous alloy thin strip. [Item 4] An amorphous alloy strip described in any one of items 1 to 3, The plate thickness is 18 μm or less. Amorphous alloy thin strip.

Claims

1. The composition is represented by the following formula (1), X, expressed by the following formula (2), is 40 or less. Amorphous alloy thin strip. Formula (1) Co １００－ａ－ｂ－ｃ－ｄ－ｅ－ｆ Mn ａ Fe ｂ Mo ｃ Si ｄ B ｅ Ni ｆ (In equation (1) above, the units of a, b, c, d, e, and f are atomic percent. The values ​​of a, b, c, d, e, and f are as follows: 0.0 ≤ a ≤ 5.0, 0.0 ≤ b ≤ 4.5, 2.6 ≤ c ≤ 4.4, 13.0 ≤ d ≤ 15.5, 8.0 ≤ e ≤ 15.0, 0.0 ≤ f ≤ 5.0) Formula (2) X={(100-a-b-c)*1.715+b*2.219+f*0.604+a*1.2} / c

2. An amorphous alloy strip according to claim 1, Magnetic flux density B when magnetized with a magnetic field of 80 A / m ８０ is 0.6T or less. Amorphous alloy thin strip.

3. An amorphous alloy strip according to claim 1, The Curie temperature is 145°C or higher. Amorphous alloy thin strip.

4. An amorphous alloy strip according to claim 1, The plate thickness is 18 μm or less. Amorphous alloy thin strip.

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