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WO2020209026A1 - Fil d'alliage cu-(ni,co)-si, fil isolé, procédé de production de fil d'alliage cu-(ni,co)-si, et procédé de production de fil isolé - Google Patents

Fil d'alliage cu-(ni,co)-si, fil isolé, procédé de production de fil d'alliage cu-(ni,co)-si, et procédé de production de fil isolé Download PDF

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Publication number
WO2020209026A1
WO2020209026A1 PCT/JP2020/012115 JP2020012115W WO2020209026A1 WO 2020209026 A1 WO2020209026 A1 WO 2020209026A1 JP 2020012115 W JP2020012115 W JP 2020012115W WO 2020209026 A1 WO2020209026 A1 WO 2020209026A1
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WO
WIPO (PCT)
Prior art keywords
wire
atomic
alloy wire
amount
alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/012115
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English (en)
Japanese (ja)
Inventor
隆介 広長
康雄 引地
亨 矢沢
一恵 若松
龍一 新井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWCC Corp
Original Assignee
SWCC Showa Cable Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SWCC Showa Cable Systems Co Ltd filed Critical SWCC Showa Cable Systems Co Ltd
Priority to JP2021513542A priority Critical patent/JPWO2020209026A1/ja
Publication of WO2020209026A1 publication Critical patent/WO2020209026A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/02—Single bars, rods, wires, or strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working

Definitions

  • the present invention relates to a method for manufacturing a Cu- (Ni, Co) -Si alloy wire, an insulated wire, a Cu- (Ni, Co) -Si alloy wire, and a method for manufacturing an insulated wire.
  • next-generation vehicles such as quick charging of mobile devices and plug-in hybrid vehicles and electric vehicles
  • high-voltage and large-current circuits are required, and a large current tends to flow through the connector. Therefore, the connector material is required to have "high conductivity" in order to suppress energy loss when energized with a large current and deterioration of connection reliability due to stress relaxation progress due to heat generation.
  • connectors for electronic devices and automobile parts are becoming smaller, lighter, and more precise, and Cu alloys, which are materials for connectors, are required to have "high strength" and "excellent elongation".
  • Cu- (Ni, Co) -Si based alloys have been attracting attention as Cu alloys satisfying these required characteristics.
  • Patent Document 1 discloses a Cu—Co—Si based alloy and a method for producing the same. According to the technique of Patent Document 1, fine second-phase particles having a particle size of 50 nm or less are divided into second-phase particles having a particle size of 5-10 nm and second-phase particles having a particle size of 10-50 nm. The number density and ratio of these particles are controlled to improve the settling resistance while maintaining high conductivity and strength.
  • Patent Document 2 discloses a technique in which a Cu- (Ni, Co) -Si alloy is applied to a conductor wire rod for an electronic device. According to the technique of Patent Document 2, the addition amount ratio of (Ni, Co) and Si is controlled, and the cold working ratio before and after the aging heat treatment is adjusted to improve the conductivity and strength.
  • the conductivity is 40% IACS or more
  • the tensile strength is 400 MPa or more
  • the elongation is 5% or more
  • Patent Documents 1 and 2 can be applied to wiring applications such as electronic parts, automobiles, and robots by using Cu- (Ni, Co) -Si alloy as a wire rod. It is not mentioned whether or not the connector terminals can be attached with a certain degree of flexibility when they are actually crimped, and it is unclear whether or not they are truly suitable for the wiring application. That is, when the connector terminals are crimped, the metal structure of the Cu- (Ni, Co) -Si alloy wire is partially stretched (strained) and the strength is increased, but the elongation is considered to decrease accordingly.
  • a main object of the present invention is Cu- having the same conductivity, strength and elongation as the techniques of Patent Documents 1 and 2 and flexibility (Vickers hardness of 150 HV or more and 200 HV or less) suitable for crimping of connector terminals.
  • the purpose of the present invention is to provide (Ni, Co) -Si alloy wire rods.
  • Si-based alloy wire Provided is a Cu- (Ni, Co) -Si based alloy wire rod characterized in that the crystal grain size (average value) of Cu matrix particles is 0.8 to 2.6 ⁇ m.
  • a Cu- (Ni, Co) -Si alloy wire having flexibility (Vickers hardness of 150 HV or more and 200 HV or less) suitable for crimping of a connector terminal in addition to conductivity, strength and elongation. (See Examples 1 and 2 below).
  • a Cu- (Ni, Co) -Si alloy wire rod and an insulated wire containing the Cu- (Ni, Co) -Si alloy wire according to a preferred embodiment of the present invention will be described, and then a method for manufacturing the insulated wire (Cu- (Ni, Co) -Si.
  • a method for manufacturing a system alloy wire rod is included.
  • the lower limit value and the upper limit value are included in the numerical range with respect to the description of “ ⁇ ” indicating the numerical range.
  • Cu- (Ni, Co) -Si-based alloy wire is an alloy wire having Cu as a matrix, and at least one of Ni or Co is 1.6. It contains ⁇ 2.1 atomic% (preferably 1.7-2.0 atomic%) and contains 0.8-1.0 atomic% of Si, and has a composition in which the balance is Cu and unavoidable impurities. There is. "At least one of Ni or Co” means either one of Ni or Co, or both Ni and Co.
  • a fine second metal mainly composed of (Ni, Co) and Si intermetallic compounds is subjected to appropriate heat treatment (including aging annealing).
  • Phase particles are precipitated, and the second phase particles are present as precipitates.
  • Phase 2 particles mainly means (Ni, Co) 2 Si, which are the crystallization generated in the solidification process of the melting and casting process described later, the precipitates generated in the subsequent cooling process, and the aging annealing process. It refers to a precipitate generated in the process, and the second phase particles also include second phase particles containing unavoidable impurities.
  • the crystal grain size (mean value) of the Cu matrix particles is 0.8 to 2.6 ⁇ m, preferably 1.5 to 1.9 ⁇ m.
  • the "crystal particle size” is a value based on JIS-H0501 (copper product crystal particle size test method).
  • the method for displaying the crystal grain size and the method for cutting are as follows. How to display the crystal grain size; The crystal grain size is indicated in mm. For example, it is expressed as 0.025 mm. The following method is used to round the calculated or observed crystal grain size. In the case of 0.010 mm or less, the value closest to an integral multiple of 0.001 mm is adopted. If it exceeds 0.010 mm and is 0.060 mm or less, the value closest to an integral multiple of 0.005 mm is adopted. If it exceeds 0.060 mm, the value closest to an integral multiple of 0.010 mm is adopted.
  • the crystal grain size is indicated by counting the number of crystal grains that are completely cut by a line segment of a known length on a microscope image or a photograph, and displaying the average value (mm) of the cutting length. If necessary, measure along three axes parallel and perpendicular to the machining direction. The value measured by the cutting method may be smaller than the value measured by the quadrature method.
  • the above Cu- (Ni, Co) -Si alloy wire has flexibility with a Vickers hardness of 150 HV or more and 200 HV or less in accordance with JIS C 2244, and wiring for automobiles (wire harnesses for automobiles) and robots. Suitable for applications.
  • the applications of Cu- (Ni, Co) -Si alloy wire rods are not limited to these applications, but can also be applied to wiring applications for electronic components, and can be applied to all applications including electrical connection.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of an insulated wire.
  • the insulated wire 1 has a conductor portion 10 and a covering portion 20.
  • the conductor portion 10 is formed by twisting a plurality of wire rods 12.
  • the conductor portion 10 may be composed of one wire rod 12 (single wire).
  • the wire rod 12 is composed of the above Cu— (Ni, Co) —Si alloy wire rod.
  • the coating portion 20 is a so-called sheath (coating) that insulates and coats the conductor portion 10, and is configured by extruding and coating a polyvinyl chloride resin (PVC: Poly Vinyl Chloride).
  • the covering portion 20 is not limited to PVC and may be made of a known insulator such as cross-linked polyethylene.
  • FIG. 2 is a flowchart showing a manufacturing method of the insulated wire over time.
  • each of the melting / casting process S1, the wire drawing process S2, the aging annealing process S3, the stranded wire processing process S4, and the insulation coating process S5 is performed in this order. Is done.
  • the raw material is melted at 1100-1300 ° C., containing at least one of Ni or Co in an amount of 1.6 to 2.1 atomic% and Si in an amount of 0.8 to 1.0 atomic%.
  • a composition (molten metal) in which the balance is composed of Cu and unavoidable impurities is prepared.
  • the "raw material” contains at least one of Ni or Co in an amount of 1.6 to 2.1 atomic% (preferably 1.7 to 2.0 atomic%) and Si in an amount of 0.8 to 1.
  • the composition may contain 0 atomic% and the balance may be composed of Cu and unavoidable impurities, and may be a simple substance in which (Ni, Co), Si and Cu are separately present at the stage before dissolution.
  • the melt (raw material after melting, molten metal) is poured into a mold and cooled to room temperature within 5 minutes to 1 hour, preferably within 5 to 30 minutes, and a bar having a constant diameter is cast.
  • the bar is drawn at a constant surface reduction rate to produce a wire having a constant diameter.
  • the wire rod is heated at 300 to 600 ° C. for 0.5 to 4 hours for aging annealing.
  • fine second-phase particles mainly composed of (Ni, Co) and Si intermetallic compounds are precipitated, and the distortion of the metal structure generated in the wire drawing step S2 is removed.
  • a Cu- (Ni, Co) -Si alloy wire can be produced by the processes from the melting / casting step S1 to the aging annealing step S3.
  • a plurality of wire rods after aging annealing are twisted and compressed to manufacture a stranded wire conductor.
  • the process of the stranded wire processing step S4 may be performed after the wire drawing process step S2 and before the aging annealing step S3 (between the wire drawing process S2 and the aging annealing step S3).
  • the insulation coating step S5 PVC is extruded and coated on the stranded conductor, and the stranded conductor is insulated and coated with PVC.
  • An insulated wire can be manufactured by the processes from the melting / casting step S1 to the insulating coating step S5.
  • the crystal grain size of the Cu matrix particles is remarkably larger than that of the sample 4-6, and the second phase particles are largely distributed in the crystal grains.
  • the correlation between the composition ratio of Cu, Co, and Si, the metallographic state, and the Vickers hardness is whether the composition ratio of Co and Si is within an appropriate range, or the second phase particles are the crystal grains of the Cu parent phase. It is considered that this is due to whether it is distributed abundantly in the boundary or in the crystal grains, and contains 1.6 to 2.1 atomic% of Co, 0.8 to 1.0 atomic% of Si, and Cu. It was found that the crystal grain size (average value) of the matrix phase of 0.8 to 2.6 ⁇ m is useful for flexibility.
  • a stranded conductor was produced from Samples 1-8 and 20 of Example 1 and its conductivity, tensile strength and elongation were measured.
  • the present invention relates to Cu- (Ni, Co) -Si alloy wire rods, and is suitably used for wiring applications such as automobiles (wire harnesses for automobiles) and robots.
  • Insulation coating process 1 Insulated wire 10 Conductor part 12 Wire rod 20 Coating part S1 Melting / casting process S2 Wire drawing process S3 Aging annealing process S4 Twisted wire processing process S5 Insulation coating process

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Conductive Materials (AREA)

Abstract

L'invention concerne un fil d'alliage Cu-(Ni,Co)-Si qui a une flexibilité (dureté Vickers de 150-200 HV) appropriée pour sertir des bornes de connecteurs, en plus de la conductivité électrique, de la résistance et de l'allongement. Ledit fil d'alliage Cu-(Ni,Co)-Si contient 1,6-2,1 % atomique de Ni et/ou de Co ; et 0,8-1,0 % atomique de Si, le reste étant constitué de Cu et d'impuretés inévitables, la taille des grains cristallins (valeur moyenne) des particules de matrice de Cu étant de 0,8-2,6 µm.
PCT/JP2020/012115 2019-04-10 2020-03-18 Fil d'alliage cu-(ni,co)-si, fil isolé, procédé de production de fil d'alliage cu-(ni,co)-si, et procédé de production de fil isolé Ceased WO2020209026A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021513542A JPWO2020209026A1 (fr) 2019-04-10 2020-03-18

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-074924 2019-04-10
JP2019074924 2019-04-10

Publications (1)

Publication Number Publication Date
WO2020209026A1 true WO2020209026A1 (fr) 2020-10-15

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PCT/JP2020/012115 Ceased WO2020209026A1 (fr) 2019-04-10 2020-03-18 Fil d'alliage cu-(ni,co)-si, fil isolé, procédé de production de fil d'alliage cu-(ni,co)-si, et procédé de production de fil isolé

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JP (1) JPWO2020209026A1 (fr)
WO (1) WO2020209026A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006225753A (ja) * 2005-01-18 2006-08-31 Kiyomine Kinzoku Kogyo Kk 電機、電子機器部品用コルソン合金細線の製造方法
JP2007305566A (ja) * 2005-12-07 2007-11-22 Furukawa Electric Co Ltd:The 配線用電線導体、配線用電線、及びそれらの製造方法
WO2009057697A1 (fr) * 2007-11-01 2009-05-07 The Furukawa Electric Co., Ltd. Matière conductrice pour dispositif électronique et fil électrique de câblage utilisant celle-ci
JP2011208232A (ja) * 2010-03-30 2011-10-20 Jx Nippon Mining & Metals Corp Ｃｕ−Ｃｏ−Ｓｉ合金材

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006225753A (ja) * 2005-01-18 2006-08-31 Kiyomine Kinzoku Kogyo Kk 電機、電子機器部品用コルソン合金細線の製造方法
JP2007305566A (ja) * 2005-12-07 2007-11-22 Furukawa Electric Co Ltd:The 配線用電線導体、配線用電線、及びそれらの製造方法
WO2009057697A1 (fr) * 2007-11-01 2009-05-07 The Furukawa Electric Co., Ltd. Matière conductrice pour dispositif électronique et fil électrique de câblage utilisant celle-ci
JP2011208232A (ja) * 2010-03-30 2011-10-20 Jx Nippon Mining & Metals Corp Ｃｕ−Ｃｏ−Ｓｉ合金材

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