EP0023362B2 - Verfahren zur Herstellung einer elektrisch leitfähigen Kupferlegierung - Google Patents

Verfahren zur Herstellung einer elektrisch leitfähigen Kupferlegierung Download PDF

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Publication number
EP0023362B2
EP0023362B2 EP19800104479 EP80104479A EP0023362B2 EP 0023362 B2 EP0023362 B2 EP 0023362B2 EP 19800104479 EP19800104479 EP 19800104479 EP 80104479 A EP80104479 A EP 80104479A EP 0023362 B2 EP0023362 B2 EP 0023362B2
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EP
European Patent Office
Prior art keywords
copper
alloy
copper alloy
zirconium
chrome
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.)
Expired - Lifetime
Application number
EP19800104479
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English (en)
French (fr)
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EP0023362A1 (de
EP0023362B1 (de
Inventor
Seika Matidori
Masato Sakai
Teshima Koichi
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.)
Toshiba Corp
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Toshiba Corp
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Priority claimed from JP9606779A external-priority patent/JPS5620136A/ja
Priority claimed from JP9988479A external-priority patent/JPS5625940A/ja
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0023362A1 publication Critical patent/EP0023362A1/de
Publication of EP0023362B1 publication Critical patent/EP0023362B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026—Alloys based on copper
    • 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

Definitions

  • the present invention relates to a method for manufacturing high electrically conductive, precipitation hardenable copper alloy wire material having both high electrical conductivity and mechanical strength.
  • GB-A-1 030 427 describes a copper alloy material comprising 0,01-0,15% Zr, the balance being high purity copper and having high electrical conductivity and mechanical strength at elevated temperatures as well as high thermal conductivity of 91.1 IACS or better, fine recrystallized grain size of less than 0,020 millimeters average diameter, and hardness after cold working of 95,6 Rockwell F or better.
  • This copper alloy material is manufactured by solution annealing at about 805°C followed by quenching. This method permits producing an alloy material of the above small grain size.
  • Copper alloy compositions comprising chrome and/or zirconium are known from GB-A-1 353 430, GB-A-921 795, JP-A-52 3523, JP-A-52 3524 and US-A-3392 016.
  • the methods disclosed in JP-A-52 3523 and JP-A-52 3524 don't mention the grain size but don't employ a solid solution treatment, whereas the methods known from GB-A-1353430, GB-A-921 795 and US-A-3392 016 do not teach a grain size control and the non-use of a solution treatment.
  • GB-A-1 194 888 discloses a high conductivity copper base alloy consisting of 0.1 to 2.5% chromium, 0.01 to 0.5% phosphorus, 0.001 to 0.25% boron, and the balance copper, apart from conventional impurities.
  • This alloy is subjected to a treatment which involves heating for at least 30 minutes at 700 to 975°C, rolling in the aforesaid temperature range, cooling to below 300°C at a rate greater than 550°C per hour, and heating at a temperature of 350 to 550°C for at least one hour. It is to be observed that this document discloses all three of the usual process steps involved in precipitation hardening, i.e. holding for a prolonged period at elevated temperature so as to bring the alloying elements into solid solution, rapid cooling to retain them in solid solution, and finally holding for a significant period at a lower elevated temperature to effect precipitation hardening.
  • an electrically conductive precipitation hardenable copper alloy wire material consisting of at least one alloying metal selected from chrome and zirconium, the balance copper, and optionally minor amounts of silicon, germanium, boron and magnesium which comprises the steps of making an ingot, hot-working so as to form the material into a suitable shape, and thereafter repeatedly cold-working and annealing, wherein the steps are performed without subjecting the material to solution treatment so as to obtain said copper alloy material having a grain size number of not less than 7 as defined by JISG 0551, a minimum electrical conductivity of about 88 (IACS %), and a minimum offset yield stress (0.2%) of about 22 kg/mm 2 .
  • the most important point of the present invention is the manufacturing of a precipitation hardenable copper alloy material having high electrical conducitivity and mechanical strength by obtaining a grain size number of not less than 7, preferably 8-9 as defined by JIS G 0551 by repeatedly annealing and cold-working the copper alloy material without the solution treatment which has heretofore required a precipitation hardening treatment,
  • the suitability for mass production obtained by eliminating the step of the solution treatment is also industrially advantageous.
  • the crystal grain size as defined by JIS G 0551 is calculated as follows.
  • Making an ingot can be performed by general vacuum melting or atmospheric melting using a carbon melting pot.
  • the base metal material preferably comprises a material containing little oxygen, such as a return material or oxygen free copper.
  • Quenching in this case means fast cooling from a temperature of 1,200-1,250°C at which the additives are added to a casting temperature of 1,100-1,150°C within a period of only 1-2 minutes.
  • This method which adopts a carbon melting pot, is especially advantageous for a chrome-copper alloy, a zirconium-copper alloy, a chrome-zirconium-copper alloy and so on.
  • Chrome is preferably added in the form of a base alloy of chrome-copper alloy. This is because the addition of metallic chrome tends to cause segregation due to a difference in melting points and small solid solubility.
  • Zirconium may be added only for deoxidation or for inclusion in the alloy.
  • Zirconium to be included in the alloy is added separately from zirconium for deoxidation. That is, after sufficiently deoxidizing with zirconium, more zirconium to be included in the alloy may be added.
  • the addition of Zr is in general preferably performed at a temperature higher than the melting point of the copper alloy.
  • zirconium is added for deoxidation and more zirconium to be included in the alloy is added. This is because Zr is easily oxidized, and the addition of Zr is thus difficult before sufficiently deoxidizing the electrolytic copper.
  • Special components such as silicon, germanium, magnesium, boron are added after the deoxidation by zirconium as needed. This is because addition of these elements after sufficient deoxidation results in a better yield. Boron is added simultaneously with chrome as a base metal.
  • the ingot making method of the Cr-Zr-Cu alloy may be summarized as follows:
  • the features of the copper alloy melted by this method are found to be the same as those of a copper alloy obtained by a conventional vacuum melting method, and have the following advantages.
  • the atmospheric melting method which uses a carbon melting pot is advantageous in that it does not require special equipment as in the vacuum melting method and the manufacturing cost may be made less.
  • This atmospheric melting method may be advantageously applicable particularly to alloys such as 0.05-1.5% Cr-Cu, preferably 0.3-1.5% Cr-Cu, more preferably 0.3-0.9% Cr-Cu; 0.05-0.5% Zr-Cu, preferably 0.1-0.5% Zr-Cu, more preferably 0.1-0.4% Zr-Cu; 0.3-1 % Cr, 0.1-0.5% Zr, and the balance of Cu; and Cu alloys containing further 0.005-0.1%, preferably 0.01-0.03% (all by weight) of silicon, germanium, boron or magnesium in addition to above ranges of Cr and Zr.
  • alloys such as 0.05-1.5% Cr-Cu, preferably 0.3-1.5% Cr-Cu, more preferably 0.3-0.9% Cr-Cu; 0.05-0.5% Zr-Cu, preferably 0.1-0.5% Zr-Cu, more preferably 0.1-0.4% Zr-Cu; 0.3-1 % Cr, 0.1-0.5% Zr, and the balance of Cu; and Cu alloys containing further 0.005-0.1%, preferably 0.01
  • the copper alloy material is repeatedly annealed and cold-worked after hot-working in order to obtain optimum results.
  • the alloy of the above composition was hot-worked at a temperature of 700-850°C by the atmospheric melting method using a carbon melting pot so as to obtain a wire of 7-10 mm in diameter. Then thus obtained wire was cold-worked after acid cleaning into a wire of 2 mm in diameter. After annealing it at a temperature of 500-650°C, it was further cold-worked into a wire of 0.26 mm in diameter.
  • Table II The characteristics of a copper alloy of cold working finish, a copper alloy of annealing finish at a temperature of 550°C, a copper alloy obtained by a conventional precipitation hardening treatment and pure copper are shown in Table II.
  • the evaluation method was as follows:
  • the specific resistance was measured at room temperature and was converted, taking 0.7241 (International Standard copper specific resistance) as 100.
  • a tensile force required to break (kg/mm 2 ).
  • Presence or absence of flexibility when twisted in wire form Presence or absence of flexibility when twisted in wire form.
  • the grain forms are, in an alloy of rolling finish, relatively elongated and, in an alloy of annealing finish, relatively circular.
  • alloys with a grain size number of not less than 7 manufactured by repeated anneal- ings and cold workings without requiring the solution treatment in accordance with the method of the present invention are shown in Table III. These alloys are an alloy (A) of 1% by weight of chrome and copper; an alloy (B) of 0.15% by weight of zirconium and copper an alloy (C) of 0.7% by weight of chrome, 0.3% by weight of zirconium and copper; an alloy (D) of 1 % by weight of chrome, 0.03% by weight of silicon and copper; an alloy (E) of 0.15% by weight of zirconium, 0.03% by weight of silicon and copper; and an alloy (F) of 0.7% by weight of chrome, 0.15% by weight of zirconium, 0.03% by weight of silicon and copper.
  • Silicon, germanium, boron, magnesium and so on are effective for improving the mechanical strength and for suppressing the generation of coarse grains.
  • the electrically conductive copper alloy manufactured by the method of the present invention may be applied in wide range including cables forwelders, elevator cables, jumpers for vehicles, crane cables, trolly hard copper twisted wires of cable rack wires for power stations and substations. lead wires and so on.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)

Claims (1)

1. Verfahren zur Herstellung eines elektrisch leitfähigen, aushärtbaren Kupferlegierungs-Drahtmaterials, bestehend aus mindestens einem Legierungs- bzw. Zusatzmetall aus der Gruppe Chrom und Zirkon, Rest Kupfer, und ggf. untergeordneten Mengen an Silizium, Germanium, Bor und Magnesium, umfassend die Schritte der Herstellung eines (Roh-)Blocks, einer Warmformgebung, um das Material in eine geeignete Form zu bringen, und des anschließenden wiederholten Warmformgebens und Anlassens oder Glühens, wobei diese Schritte durchgeführt werden, ohne das Material einer Lösungsbehandlung zu unterwerfen, und damit das Kupferlegierungsmaterial mit einer Korngrößenzahl von nicht weniger als 7, definiert nach JISG 0551, einer elektrischen Mindest-Leitfähigkeit von etwa 88 (IACS %) und einer Mindest-Versatzstreckspannung (0,2 %) von etwa 22 kg/mm2 bereitzustellen.
EP19800104479 1979-07-30 1980-07-29 Verfahren zur Herstellung einer elektrisch leitfähigen Kupferlegierung Expired - Lifetime EP0023362B2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP96067/79 1979-07-30
JP9606779A JPS5620136A (en) 1979-07-30 1979-07-30 Copper alloy member
JP99884/79 1979-08-07
JP9988479A JPS5625940A (en) 1979-08-07 1979-08-07 Refinig method of copper alloy

Publications (3)

Publication Number Publication Date
EP0023362A1 EP0023362A1 (de) 1981-02-04
EP0023362B1 EP0023362B1 (de) 1985-06-19
EP0023362B2 true EP0023362B2 (de) 1993-04-28

Family

ID=26437313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800104479 Expired - Lifetime EP0023362B2 (de) 1979-07-30 1980-07-29 Verfahren zur Herstellung einer elektrisch leitfähigen Kupferlegierung

Country Status (2)

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EP (1) EP0023362B2 (de)
DE (1) DE3070776D1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352134A (en) * 1979-11-19 1982-09-28 International Business Machines Corporation Magnetic head assembly with corrosion resistant conductive wire
JPS59117144A (ja) * 1982-12-23 1984-07-06 Toshiba Corp リ−ドフレ−ムおよびその製造方法
US4749548A (en) * 1985-09-13 1988-06-07 Mitsubishi Kinzoku Kabushiki Kaisha Copper alloy lead material for use in semiconductor device
DE3854682T2 (de) * 1987-05-26 1996-04-25 Nippon Steel Corp Eisen-Kupfer-Chrom-Legierung für einen hochfesten Leiterrahmen oder ein Steckstiftgitter und Verfahren zu ihrer Herstellung.
EP0569036B1 (de) * 1992-05-08 1998-03-11 Mitsubishi Materials Corporation Draht für elektrische Bahnstrecke und Verfahren zur Herstellung desselben
US5705125A (en) * 1992-05-08 1998-01-06 Mitsubishi Materials Corporation Wire for electric railways
US5370840A (en) * 1992-11-04 1994-12-06 Olin Corporation Copper alloy having high strength and high electrical conductivity
US5486244A (en) * 1992-11-04 1996-01-23 Olin Corporation Process for improving the bend formability of copper alloys
US5306465A (en) * 1992-11-04 1994-04-26 Olin Corporation Copper alloy having high strength and high electrical conductivity
DE19530673A1 (de) * 1994-09-15 1996-03-21 Siemens Ag Oberleitungsdraht einer elektrischen Hochgeschwindigkeitsbahnstrecke und Verfahren zu dessen Herstellung
CN109717992B (zh) * 2014-11-28 2021-07-16 元心科技(深圳)有限公司 管腔支架预制件及由管腔支架预制件制备的管腔支架
CN111621666B (zh) * 2020-06-22 2021-05-07 陕西斯瑞新材料股份有限公司 一种Cu-Cr系列合金板带的轧制方法
CN112301251A (zh) * 2020-09-25 2021-02-02 中铜华中铜业有限公司 一种时效强化型Cu-Cr-Zr合金板/带材及其制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB508330A (en) * 1937-04-02 1939-06-29 Philips Nv Improvements in or relating to wire-shaped bodies of high tensile strength and smallspecific resistance
GB921795A (en) * 1961-01-27 1963-03-27 Mallory Metallurg Prod Ltd Improvements in and relating to copper-base alloys
NL295109A (de) * 1962-12-26
GB1094579A (en) * 1965-10-15 1967-12-13 American Metal Climax Inc Copper-zirconium-magnesium alloy
SU515818A1 (ru) * 1971-07-20 1976-05-30 Государственный Научно-Исследовательский И Проектный Институт Сплавов И Обработки Цветных Металлов Сплав на основе меди

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EP0023362A1 (de) 1981-02-04
EP0023362B1 (de) 1985-06-19
DE3070776D1 (en) 1985-07-25

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