CN114512289A - Amorphous nanocrystalline alloy strip with high lamination coefficient, manufacturing method and application - Google Patents

Amorphous nanocrystalline alloy strip with high lamination coefficient, manufacturing method and application Download PDF

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Publication number
CN114512289A
CN114512289A CN202011288516.2A CN202011288516A CN114512289A CN 114512289 A CN114512289 A CN 114512289A CN 202011288516 A CN202011288516 A CN 202011288516A CN 114512289 A CN114512289 A CN 114512289A
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strip
thickness
ribbon
nozzle
amorphous nanocrystalline
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陈文智
刘国栋
李百松
史杨
李志刚
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Antai Amorphous Technology Co ltd
Advanced Technology and Materials Co Ltd
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Antai Amorphous Technology Co ltd
Advanced Technology and Materials Co Ltd
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Priority to CN202011288516.2A priority Critical patent/CN114512289A/en
Priority to PCT/CN2021/080904 priority patent/WO2022105079A1/en
Publication of CN114512289A publication Critical patent/CN114512289A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/008—Amorphous alloys with Fe, Co or Ni as the major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/02—Amorphous alloys with iron as the major constituent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15341—Preparation processes therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets

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Abstract

The invention relates to an amorphous nanocrystalline alloy strip with a high lamination coefficient, a manufacturing method and application thereof0Greater than the thickness H of the two side edges of the stripLAnd HRAnd the difference is not more than 2.5 microns. The invention realizes the amorphous nanocrystalline of the invention by improving the plate shape of the amorphous nanocrystalline alloy strip, controlling the thickness of the middle part and the thickness of the two side edges of the strip, and simultaneously improving the roughness of the roller-attaching surface and the free surface of the stripThe lamination factor of the alloy strip exceeds 90%.

Description

Amorphous nanocrystalline alloy strip with high lamination coefficient, manufacturing method and application
Technical Field
The invention belongs to the field of strips, and particularly relates to an amorphous nanocrystalline alloy strip with a high lamination coefficient, a manufacturing method and application.
Background
The amorphous nanocrystalline alloy is a soft magnetic material which is rapidly developed in recent years, has higher magnetic conductivity and lower alternating current loss compared with the traditional soft magnetic materials such as electrical steel, ferrite and the like, and is widely applied to iron cores of magnetic components such as transformers, inductors, mutual inductors, motor stators and the like. When used in transformers, inductors, transformers, motor stators, etc., amorphous nanocrystalline alloy ribbon having a thickness of only about 0.025 mm is typically wound or stacked into an iron core.
In order to reduce the volume of the iron core and the components, the amorphous nanocrystalline alloy strip is always desirable to have the lamination coefficient as high as possible. The lamination factor (also referred to as stacking factor, fill factor, etc.) of an amorphous nanocrystalline alloy ribbon is defined as the ratio of the actual cross-sectional area occupied by amorphous nanocrystalline material over the cross-sectional area of a stack of amorphous nanocrystalline alloy ribbons to the outer cross-sectional area of the stack. The lamination factor of the amorphous nanocrystalline alloy ribbon may be measured using the method of International electrotechnical Commission Standard IEC 60404-8-11. At present, the lamination coefficient of a mainstream amorphous nanocrystalline alloy strip product is generally between 78% and 88%.
Chinese patent CN1175436C discloses a high stacking factor amorphous alloy ribbon which achieves a stacking factor higher than 86% by controlling the surface smoothness of the ribbon and making the thickness extremely uniform.
Chinese patent CN101384745A discloses an amorphous alloy thin strip with excellent space factor, which improves the surface smoothness of the amorphous strip by controlling the roughness of a cooling roll and other measures, and finally leads the lamination factor of the amorphous strip to reach more than 80 percent.
With the continuous improvement of the process technology, the lamination coefficient of the amorphous nanocrystalline alloy strip which can be stably provided at home and abroad at present reaches 88%, and the market provides clear requirements for the amorphous nanocrystalline alloy strip with the lamination coefficient higher than 90%. However, the prior art can not ensure that the lamination coefficient of the amorphous nanocrystalline alloy strip stably reaches more than 90%.
Disclosure of Invention
The invention provides an amorphous nanocrystalline alloy strip with high lamination coefficient, a manufacturing method and application for solving the problems.
An amorphous nanocrystalline alloy strip with a high lamination coefficient,
a thickness H in the middle of the strip material in the width direction of the strip material0Greater than the thickness H of the two side edges of the stripLAnd HRAnd the difference is not greater than 2.5 microns:
H0-HLless than or equal to 2.5 microns, and H0-HRLess than or equal to 2.5 microns.
Further, the thickness H of the middle part of the strip0The thickness H of the two side edges of the stripLAnd HRThe thickness difference is 0.1-2.5 microns:
0.1≤H0-HLless than or equal to 2.5 microns and less than or equal to 0.1H0-HRLess than or equal to 2.5 microns.
Further, the thickness H of the middle part of the strip0The thickness H of the two side edges of the stripLAnd HRThe thickness difference is 0.5-1.5 microns:
0.5≤H0-HLless than or equal to 1.5 microns and less than or equal to 0.5H0-HRLess than or equal to 1.5 microns.
Further, in the width direction of the strip, the absolute value of the difference between the value of the thickness of the edge at one side and the value of the thickness of the edge at the other side of the strip is not more than 2.0 μm, namely:
|HL-HRless than or equal to 2.0 microns.
Further, in the width direction of the strip, the absolute value of the difference between the value of the thickness of the edge at one side and the value of the thickness of the edge at the other side of the strip is not more than 1.0 μm:
|HL-HRless than or equal to 1.0 micron.
Further, in the width direction of the strip, in addition to the middle portion and the two edges, the thickness values of the other respective measurement points lie between the middle thickness value and the respective edge thickness values:
HL≤Hi≤H0and H isR≤Hj≤H0，
Wherein i is 1, 2.. multidot.m; j is 1, 2.
Further, the absolute value of the thickness difference between any two adjacent thickness measurement points in the width direction of the strip is not greater than 1.5 microns.
Further, the ten-point average value R of the roughness of the roll surface of the strip materialaLess than or equal to 0.50 micron; ten point average R of the roughness of the free surface of the stripaLess than or equal to 0.40 micron.
Further, the lamination factor of the strip is greater than 90%.
Further, the lamination factor of the strip is greater than 92%.
Further, the main component of the strip has the following general expression:
XaYbZc
wherein X is at least one of ferromagnetic metal elements Fe, Co and Ni, and the total content a is 65-85 at%;
y is at least one of transition metal elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Cu, Ag, Au, Zn and Al and Sn, and the total content b is between 0 and 10at percent;
z is at least one of amorphous elements Si, B, P and C, and the total content C is 15-30 at%.
Further, the main component alloy of the strip contains impurity elements in a total amount of not more than 0.5 at%.
A core comprising a strip material as claimed in any one of the preceding claims.
A magnetic component, said magnetic component comprising an iron core of said strip, said magnetic component comprising: transformer, inductor, mutual-inductor and motor stator.
A method of making an amorphous nanocrystalline alloy ribbon with a high lamination factor, comprising:
melting the raw materials into alloy liquid;
pouring alloy liquid into a nozzle ladle with a nozzle at the bottom;
the alloy liquid flows out from the nozzle, and the outer circumferential surface of a cooling roller which is spread below the nozzle and rotates at high speed is cooled to form an amorphous nanocrystalline alloy strip;
in the process that the alloy liquid flows out of the nozzle, the alloy liquid flow in the areas on the two sides of the nozzle is smaller than the alloy liquid flow in the middle of the nozzle, and a strip with the thickness of the middle part larger than that of the areas on the two sides is obtained;
the static pressure of the alloy liquid at the nozzle is 20-60 kPa.
The method is further characterized in that the temperature of the alloy liquid in the nozzle pack is 1250-1450 ℃.
Further, the nozzle slit of the nozzle has a maximum middle width, and the width of the nozzle slit continuously decreases from the maximum middle width to both side edges.
Further, the distance between the middle part of the nozzle and the surface of the cooling roller is larger than or equal to the distance between the two side areas of the nozzle and the surface of the cooling roller.
Further characterized in that the chill roll surface roughness RaNot greater than 0.40 microns.
Further, the alloy used for the raw material is characterized by having the following general expression:
XaYbZc
wherein X is at least one of ferromagnetic metal elements Fe, Co and Ni, and the total content a is 65-85 at%;
y is at least one of transition metal elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Cu, Ag, Au, Zn and Al and Sn, and the total content b is between 0 and 10at percent;
z is at least one of amorphous elements Si, B, P and C, and the total content C is 15-30 at%.
Further, the alloy used for the raw material also contains impurity elements in a total amount of not more than 0.5 at%.
The invention has the beneficial effects that:
the invention provides an amorphous nanocrystalline alloy strip with high lamination coefficient and a manufacturing method thereof, and the lamination coefficient of the amorphous nanocrystalline alloy strip is over 90 percent by improving the plate shape of the amorphous nanocrystalline alloy strip, controlling the thickness of the middle part and the thickness of the edges at two sides of the strip and simultaneously improving the roughness of the roller attaching surface and the free surface of the strip. The strip manufacturing method provided by the invention has the advantages that the steps are simple, the control is convenient, the amorphous nanocrystalline alloy strip with the lamination coefficient exceeding 90% can be prepared by controlling the alloy liquid pressure, the alloy flow and the distance between the nozzle and the cooling roller, and the volume of a magnetic component is further reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a cross-section and thickness measurement points of an amorphous nanocrystalline ribbon;
FIG. 2 is a graph of strip profile versus lamination factor;
FIG. 3 is a graph of strip surface roughness versus lamination factor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Amorphous nanocrystalline alloys used as soft magnetic materials are currently formed into cores of various shapes by winding or laminating strips produced by the planar flow technique. Since the strip cannot have a perfectly flat surface, there must be some gaps between the sheets when winding or laminating. Thus, the actual cross-sectional area of the material in the wound or laminated core is less than its profile cross-sectional area, i.e., the lamination factor is less than 100%.
The thickness distribution of a thin sheet or strip of material across the width is often referred to as a profile. It is believed that sheet-like materials will have the highest lamination factor when they have the desired plate shape (i.e., flat surface, or have a uniform thickness). However, the inventors have found that this rule is not true for amorphous nanocrystalline alloy ribbons produced by planar flow techniques, where the highest lamination factor is obtained when the thickness of the amorphous nanocrystalline alloy ribbon is slightly convex in the center, i.e., the thickness in the middle of the ribbon width is greater than the thickness of the two edges within a certain range.
The inventor researches the lamination coefficient variation law of 482 batches of amorphous strips with approximate free surface roughness (Ra being 0.38-0.42 microns) but different plate types. The thickness distribution of the strip in the width direction was measured by the method of International electrotechnical Commission Standard IEC 60404-8-11. The specific method comprises the following steps: the thickness of the strip was measured sequentially point by point from the middle of the strip width to both sides of the strip width at intervals of 10mm, respectively, until both side edges of the strip were reached. The thickness value of the middle part of the strip is marked as H0(ii) a The thickness value at the left edge of the strip is marked HL(ii) a The thickness value at the right edge of the strip is marked HR(ii) a The thickness values of the other positions on the left side of the strip are marked as HiWherein i represents a position in the middle H0The ith measurement point on the right, i ═ 1, 2.., m; other on the right side of the stripThe thickness value of a location is marked HjWherein j represents a position in the middle H0The j-th measurement point on the right, j 1, 2. The value of m is related to the width of the strip. The cross section and thickness measurement of the strip is shown in figure 1.
After the above studies, the inventors obtained a strip profile versus lamination factor curve as shown in fig. 2. It can be seen that even if the profile of the strip is perfectly flat (i.e. the thickness of the middle portion of the strip is equal to the thickness of the edges), the lamination factor is not the highest, but rather when the thickness of the middle portion of the strip is slightly greater than the thickness of the edges of the strip (i.e. H)0>HLAnd H is0>HR) I.e. the strip has a slightly convex central profile, a higher lamination factor. But when the thickness of the middle part is more than 2.5 microns larger than the thickness of the two side edges, the lamination coefficient is gradually reduced. Therefore, only when the strip plate is slightly convex in the center, that is, the thickness of the middle part is larger than the thickness of the two side edges by 2.5 micrometers (that is, 0)<H0-HLLess than or equal to 2.5 microns and 0<H0-HR2.5 microns) with the highest lamination factor range.
In order to provide the highest lamination factor for the strip, the thickness of the strip must be controlled within a certain range in other regions of the strip, in addition to the thickness of the strip in the middle region being greater than the thickness of the edges within a certain range. Specifically, the thickness of the strip at locations other than the center and edges must be controlled between the center and edge thicknesses (i.e., H)L≤Hi≤H0And H isR≤Hj≤H0. Wherein i is 1, 2.. multidot.m; j ═ 1, 2.., m).
In addition, in order to obtain the highest lamination factor of the strip, the thicknesses of the two edges of the strip must not differ too much, the absolute value of the difference between the two thicknesses being controlled within 2.0 μm, namely: | HL-HRLess than or equal to 2.0 microns. In addition, the absolute value of the difference between the thickness values of any two adjacent measurement points in the width direction of the strip should be no greater than 1.5 microns.
The research of the inventor also discovers that the surface of the strip is roughThe degree has a relatively obvious influence on the lamination coefficient, and the reduction of the surface roughness can improve the lamination coefficient of the strip. After studying the law of variation of lamination coefficients of 309 batches of amorphous strips with similar plate types but different surface roughness, we obtained a curve of the relationship between the surface roughness of the strip and the lamination coefficient as shown in fig. 3. It can be seen that the lamination factor as a whole has a monotonically increasing trend as the roughness of the strip surface decreases. Therefore, improving the surface roughness of the strip is advantageous for increasing the lamination factor, namely: ten-point average value R of roughness of roll surface of strip materialaLess than or equal to 0.50 microns, and a ten-point average R of the roughness of the free surface of the stripaLess than or equal to 0.40 micron.
After the relationship between the surface state of the amorphous nanocrystalline alloy strip and the lamination coefficient is deeply researched and the influence rule of the strip plate type and the surface roughness on the lamination coefficient is obtained, the amorphous nanocrystalline alloy strip with the expected central slightly convex plate type and good surface quality can be obtained by reasonably optimizing the manufacturing process, so that the lamination coefficient of the strip is improved.
The invention relates to an amorphous nanocrystalline alloy strip with a high lamination coefficient, in the width direction of the strip, the thickness of the middle part of the strip is larger than the thickness of the two side edges of the strip, and the difference between the thickness of the middle part of the strip and the thickness of the two side edges of the strip is not more than 2.5 microns;
specifically, the thickness value of the strip at the measuring point of the middle part of the strip in the width direction of the strip is H0The strip thickness value corresponding to the measurement point of the left edge of the strip is HLThe strip thickness value at the right edge measurement point is HR，H0And HL、HRThe relationship of (1) is:
H0-HLless than or equal to 2.5 microns, and H0-HRLess than or equal to 2.5 microns;
furthermore, the absolute value of the thickness difference between the thickness of the middle part of the strip and the thickness of the edges of the two sides of the strip is 0.1-2.5 micrometers. Namely: the thickness value of the strip material at the measuring point of the middle part of the strip material in the width direction of the strip material is H0Corresponding bands at the left edge measuring point of the stripThe thickness value of the material is HLThe strip thickness at the right edge measurement point corresponds to a value HR，H0And HL、HRThe relationship of (1) is:
0.1≤H0-HLless than or equal to 2.5 microns and less than or equal to 0.1H0-HRLess than or equal to 2.5 microns.
Furthermore, the thickness difference between the thickness of the middle part of the strip and the thickness of the two side edges of the strip is 0.5-1.5 microns, namely: h is more than or equal to 0.50-HLLess than or equal to 1.5 microns and less than or equal to 0.5H0-HRLess than or equal to 1.5 microns.
Specifically, in the width direction of the strip, the absolute value of the thickness difference between the strip thickness value of one side of the strip and the strip thickness value of the other side of the strip is not more than 2.0 microns, namely: | HL-HRLess than or equal to 2.0 microns.
Further, in the width direction of the strip, the absolute value of the thickness difference between the thicknesses of the two edges is not more than 1.0 micron, namely: | HL-HRLess than or equal to 1.0 micron.
Specifically, in the width direction of the strip, except for the middle and two edges, the thickness of each point is between the thickness of the middle part and the thickness of the corresponding edge, namely: hL≤Hi≤H0And H isR≤Hj≤H0. Wherein i is 1, 2.. multidot.m; j is 1, 2.
Specifically, the absolute value of the difference between the thickness values of any two adjacent measurement points in the width direction of the strip should be no greater than 1.5 microns.
In particular, the ten-point average value R of the roughness of the roll surface of the stripaLess than or equal to 0.50 micron;
further, the ten-point average value R of the roughness of the roll surface of the stripaLess than or equal to 0.40 micron;
in particular, the ten-point average R of the roughness of the free surface of the stripaLess than or equal to 0.40 micron;
further, a ten-point average R of the roughness of the free surface of the stripaLess than or equal to 0.30 micron;
specifically, the lamination coefficient of the strip is not lower than 90%;
further, the lamination factor of the strip is not less than 92%.
The invention also provides an iron core, which comprises the strip material.
The invention also provides a magnetic component, which comprises the iron core, and the magnetic component comprises: transformers, inductors, transformers, and other magnetic components such as motor stators.
According to the invention, through the transverse distribution of the thickness of the strip and the control of the roughness of the free surface and the surface of the pasting roller of the strip, the amorphous nano-alloy strip has a lamination coefficient of over 90 percent, and the application of the amorphous nano-alloy strip meeting the conditions in the iron core of a magnetic component is realized.
The invention also provides a manufacturing method for manufacturing the amorphous nanocrystalline alloy strip with the high lamination coefficient, and the amorphous nanocrystalline alloy strip is manufactured by adopting a planar flow process.
The manufacturing method of the present invention includes:
the method comprises the following steps: melting raw materials in a certain ratio into alloy liquid by using a smelting furnace;
step two: the temperature of the smelted alloy liquid is adjusted and the production rhythm is buffered;
step three: pouring alloy liquid into a nozzle ladle with a slit nozzle at the bottom;
step four: the alloy liquid flows out from the nozzle, and the outer circumferential surface of a cooling roller which is spread below the nozzle and rotates at high speed is cooled to form the amorphous nanocrystalline alloy strip.
The temperature regulation of the alloy liquid and the buffering of the production rhythm are usually carried out in a tundish, and the tundish can be omitted when the strip is prepared on a small scale or in a laboratory.
And in the process of flowing the alloy liquid out of the nozzle, controlling the alloy liquid flow of the edges of two sides of the nozzle (corresponding to the edges of the strip) to be smaller than the alloy liquid flow of the middle part of the nozzle (corresponding to the middle part of the strip), and realizing that the thickness of the middle part of the prepared strip is larger than that of the areas of the two sides.
The temperature of the alloy liquid in the nozzle pack is 1250-1450 ℃;
furthermore, the temperature of the alloy liquid in the nozzle pack is 1300-1420 ℃.
The static pressure of the alloy liquid at the nozzle is 20-60 kPa;
further, the static pressure of the alloy liquid at the nozzle is 30-50 kPa.
In the manufacturing method of the invention, in order to further ensure that the strip with the slightly convex center plate type can be prepared, the width of the nozzle slot is continuously reduced from the middle to two edges, and the width difference between the middle part and the edge part of the nozzle slot is 0-0.1 mm.
The shape of the bottom surface of the nozzle can be set, the distance between the nozzle and the surface of the cooling roller (referred to as the roller nozzle distance for short) can be adjusted, the roller nozzle distance in the middle of the nozzle (corresponding to the middle of the width of the strip) is ensured to be larger than or equal to the roller nozzle distance at the edge of the nozzle (corresponding to two transverse edges of the strip), and the difference between the two is 0-0.1 mm.
In order to ensure that the surface of the produced amorphous nano-alloy strip has low roughness, the roughness of the surface of the cooling roller is controlled, in particular, the roughness R of the surface of the cooling roller is controlledaNot greater than 0.40 microns.
The surface of the cooling roller is processed in advance, and the surface of the cooling roller is continuously polished by a sand paper (cloth) wheel, a metal brush wheel or a resin brush wheel containing abrasive particles in the process of producing the belt, so that the surface state of the cooling roller is ensured.
The main components of the amorphous nanocrystalline alloy strip have the following general expression:
XaYbZc
wherein X is at least one of ferromagnetic metal elements Fe, Co and Ni, and the total content a is 65-85 at%; y is at least one of transition metal elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Cu, Ag, Au, Zn and Al and Sn, and the total content b is between 0 and 10at percent; z is at least one of amorphous elements Si, B, P, C, etc., and the total content C is 15 to 30 at%. In addition, the alloy can also contain impurity elements with the total amount not exceeding 0.5at percent, wherein the at percent is the atomic number percentage.
To better illustrate the preparation method and parameter control of the present invention, the following examples are provided:
the method is characterized in that mother alloy liquid with different components is smelted by industrial pure raw materials, iron-based, cobalt-based and iron-nickel-based amorphous alloys or nanocrystalline alloy strips with different widths and thicknesses are manufactured according to the manufacturing method, and parameters such as the temperature of alloy liquid in a nozzle bag, the width of a nozzle gap, the distance between roller nozzles, the pressure of the alloy liquid at the nozzle, the surface linear velocity of a cooling roller, the surface roughness of the roller surface and the like are set in the manufacturing process. Process parameters outside the scope of the invention were also set as comparative examples.
TABLE 1
Figure BDA0002783141910000091
Figure BDA0002783141910000101
Figure BDA0002783141910000111
The thickness distribution and lamination factor of the strip in the width direction in the above examples and comparative examples were measured by the method of International electrotechnical Commission Standard IEC 60404-8-11, and the surface roughness Ra of the strip face and free face was measured by the method of Chinese national Standard GB/T3505-2009(ISO 4287: 1997). Table 2 shows the corresponding measurement results.
TABLE 2
Figure BDA0002783141910000112
Figure BDA0002783141910000121
From table 2, it can be seen that both the profile and the lamination factor of the strip achieve the object of the invention when the solution defined by the invention is used.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (21)

1. An amorphous nanocrystalline alloy strip with high lamination coefficient is characterized in that,
a thickness H in the middle of the strip material in the width direction of the strip material0Greater than the thickness H of the two side edges of the stripLAnd HRAnd the difference is not greater than 2.5 microns:
H0-HLless than or equal to 2.5 microns, and H0-HRLess than or equal to 2.5 microns.
2. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein the ribbon middle portion thickness H0The thickness H of the two side edges of the stripLAnd HRThe thickness difference is 0.1-2.5 microns:
0.1≤H0-HLless than or equal to 2.5 microns and less than or equal to 0.1H0-HRLess than or equal to 2.5 microns.
3. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein the ribbon middle portion thickness H0The thickness H of the two side edges of the stripLAnd HRThe thickness difference is 0.5-1.5 microns:
0.5≤H0-HLless than or equal to 1.5 microns and less than or equal to 0.5H0-HRLess than or equal to 1.5 microns.
4. The amorphous nanocrystalline alloy ribbon with a high stacking factor as claimed in claim 1, wherein an absolute value of a difference between a value of a thickness of one side edge and a value of a thickness of the other side edge of the ribbon in a width direction of the ribbon is not more than 2.0 μm, namely:
|HL-HRless than or equal to 2.0 microns.
5. The amorphous nanocrystalline alloy ribbon with a high stacking factor as claimed in claim 1, wherein an absolute value of a difference between a value of thickness of one side edge and a value of thickness of the other side edge of the ribbon in a width direction of the ribbon is not more than 1.0 μm:
|HL-HRless than or equal to 1.0 micron.
6. The amorphous nanocrystalline alloy strip with a high stacking factor according to claim 1, wherein the thickness values of the other respective measurement points, except for the middle portion and the two edges, in the width direction of the strip are between the middle thickness value and the corresponding edge thickness value:
HL≤Hi≤H0and H isR≤Hj≤H0，
Wherein i is 1, 2.. multidot.m; j is 1, 2.
7. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein an absolute value of a thickness difference between any two adjacent thickness measurement points in a width direction of the ribbon is not greater than 1.5 μm.
8. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein the ribbon has a ten-point average R of the roll-to-roll roughnessaLess than or equal to 0.50 micron; ten point average R of the roughness of the free surface of the stripaLess than or equal to 0.40 micron.
9. The amorphous nanocrystalline alloy ribbon with a high lamination factor according to claim 1, wherein the ribbon has a lamination factor greater than 90%.
10. The amorphous nanocrystalline alloy ribbon with a high lamination factor according to claim 1, wherein the ribbon has a lamination factor greater than 92%.
11. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein a main component of the ribbon has a general expression as follows:
XaYbZc
wherein X is at least one of ferromagnetic metal elements Fe, Co and Ni, and the total content a is 65-85 at%;
y is at least one of transition metal elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Cu, Ag, Au, Zn and Al and Sn, and the total content b is between 0 and 10at percent;
z is at least one of amorphous elements Si, B, P and C, and the total content C is 15-30 at%.
12. The amorphous nanocrystalline alloy ribbon with a high lamination coefficient according to claim 1, wherein the main component alloy of the ribbon further contains impurity elements in a total amount of not more than 0.5 at%.
13. A core, characterized in that it comprises a strip according to any one of the preceding claims 1-12.
14. A magnetic component, characterized in that the magnetic component comprises the iron core of claim 12, the magnetic component comprising: transformer, inductor, mutual-inductor and motor stator.
15. A method for manufacturing an amorphous nanocrystalline alloy ribbon with a high lamination factor, comprising:
melting the raw materials into alloy liquid;
pouring alloy liquid into a nozzle ladle with a nozzle at the bottom;
the alloy liquid flows out from the nozzle, and the outer circumferential surface of a cooling roller which is spread below the nozzle and rotates at high speed is cooled to form an amorphous nanocrystalline alloy strip;
in the process that the alloy liquid flows out of the nozzle, the alloy liquid flow in the areas on the two sides of the nozzle is smaller than the alloy liquid flow in the middle of the nozzle, and a strip with the thickness of the middle part larger than that of the areas on the two sides is obtained;
the static pressure of the alloy liquid at the nozzle is 20-60 kPa.
16. The method for manufacturing the amorphous nanocrystalline alloy ribbon with the high lamination coefficient according to claim 15, wherein the temperature of the alloy liquid in the nozzle pack is 1250-1450 ℃.
17. The method of claim 15, wherein the nozzle slit of the nozzle has a maximum width in the middle of the nozzle slit, and the width of the nozzle slit continuously decreases from the maximum width in the middle to the two side edges.
18. The method of claim 15, wherein the distance between the middle of the nozzle and the surface of the cooling roller is greater than or equal to the distance between the two side areas of the nozzle and the surface of the cooling roller.
19. The method of claim 15, wherein the cooling roll surface roughness R is a surface roughness of the amorphous nanocrystalline alloy ribbon with a high lamination factoraNot greater than 0.40 microns.
20. The method of claim 15, wherein the alloy used as the starting material has the general expression:
XaYbZc
wherein X is at least one of ferromagnetic metal elements Fe, Co and Ni, and the total content a is 65-85 at%;
y is at least one of transition metal elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Cu, Ag, Au, Zn and Al and Sn, and the total content b is between 0 and 10at percent;
z is at least one of amorphous elements Si, B, P and C, and the total content C is 15-30 at%.
21. The method of claim 20, wherein the alloy used as the starting material further contains impurity elements in a total amount of no more than 0.5 at%.
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