EP0384862B1 - Alliages CuSn désoxydés partiellement au Mg - ou au Ca - destinés aux conducteurs électriques et/ou thermiques - Google Patents

Alliages CuSn désoxydés partiellement au Mg - ou au Ca - destinés aux conducteurs électriques et/ou thermiques Download PDF

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Publication number
EP0384862B1
EP0384862B1 EP19900420088 EP90420088A EP0384862B1 EP 0384862 B1 EP0384862 B1 EP 0384862B1 EP 19900420088 EP19900420088 EP 19900420088 EP 90420088 A EP90420088 A EP 90420088A EP 0384862 B1 EP0384862 B1 EP 0384862B1
Authority
EP
European Patent Office
Prior art keywords
ppm
bath
content
process according
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.)
Expired - Lifetime
Application number
EP19900420088
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0384862A1 (fr
Inventor
Abbas Borhan Tavakoli
Jean-Marie Welter
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.)
Trefimetaux SAS
Original Assignee
Trefimetaux SAS
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 Trefimetaux SAS filed Critical Trefimetaux SAS
Publication of EP0384862A1 publication Critical patent/EP0384862A1/fr
Application granted granted Critical
Publication of EP0384862B1 publication Critical patent/EP0384862B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
    • 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
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • 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

Definitions

  • the present invention relates to the field of CuSn alloys intended for the manufacture of electrical and / or thermal conductors.
  • These electrical and / or thermal conductors are used either as flat bars with sharp or rounded angles, for electrical panels and conduits, or as electrical conductors in rotating machines (collectors or winding), or as thermal conductors in heat exchangers.
  • alloy compositions are in percentage by weight.
  • CuETP (C11000) has low mechanical resistance and therefore requires to harden it, one or more drawing or rolling passes (operations which are expensive and slow) with, sometimes intermediate annealing because of its limited capacity. of work hardening. On the other hand, its semi-softening temperature (in relation to the heat resistance) is low.
  • the CuAg alloys (0.035 to 0.08% Ag), they have an average ductility, are relatively expensive and have an average heat resistance.
  • the object of the invention is therefore to provide a copper alloy which meets the requirements listed above, as well as its manufacturing process.
  • the abovementioned objective is achieved by a CuSn alloy obtained by partial and controlled deoxidation of copper with magnesium or calcium.
  • the inventor has found that the CuSn alloys according to the invention had, compared to the alloys of the prior art used for the same applications, an electrical conductivity close to very slightly lower, improved mechanical properties for a comparable ductility, a resistance significantly higher corrosion corrosion, higher heat resistance.
  • the shaping of the metal comprises a step of hot spinning, a step of drawing, possibly followed by a step of drawing, to the final dimensions.
  • the metal can also be shaped by hot rolling followed by cold rolling to the final thickness.
  • the process according to the invention is entirely under control thanks to suitable chemical analysis techniques: the additions of Mg or Ca are made according to the information provided by these analyzes, so that it is possible to carry out a partial deoxidation and controlled from the Cu bath to the desired level which may correspond to a free oxygen content of less than 10 ppm.
  • the process therefore makes it possible to obtain reliable and reproducible CuSn alloys that are efficient, even starting from Cu waste which may contain varying levels of impurities.
  • the process according to the invention is particularly economical, on the one hand because of the low content of alloying elements (Sn) and because of small amounts of Mg or Ca consumed by the process according to the invention, but of on the other hand, above all because of the mechanical properties of the alloy according to the invention, which make it possible to reduce the number of drawing, drawing, and rolling passes without costly intermediate anneals which are detrimental to productivity.
  • This alloy was produced in the following way:
  • CO reducing atmosphere
  • This alloy was produced according to the same process (as in Example I). Partial deoxidation was carried out with 30 ppm Mg.
  • Example which highlights the effects of a strong deoxidation by Mg of the CuSn 600ppm alloy on the thermomechanical characteristics in particular on the electrical conductivity, which drops considerably.
  • This alloy was produced according to the same process as in application example I.
  • the deoxidation was carried out with 110 ppm of Mg.
  • Alloy A represents an example according to the invention.
  • Cu ETP and Cu Ag 0.08% represent examples according to the prior art.
  • Alloy B represents an example according to the invention while the other alloys are examples of the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Conductive Materials (AREA)
EP19900420088 1989-02-22 1990-02-20 Alliages CuSn désoxydés partiellement au Mg - ou au Ca - destinés aux conducteurs électriques et/ou thermiques Expired - Lifetime EP0384862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8902850A FR2643388B1 (fr) 1989-02-22 1989-02-22 Alliages cusn desoxydes partiellement au mg- ou au ca- destines aux conducteurs electriques et/ou thermiques
FR8902850 1989-02-22

Publications (2)

Publication Number Publication Date
EP0384862A1 EP0384862A1 (fr) 1990-08-29
EP0384862B1 true EP0384862B1 (fr) 1993-07-28

Family

ID=9379367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900420088 Expired - Lifetime EP0384862B1 (fr) 1989-02-22 1990-02-20 Alliages CuSn désoxydés partiellement au Mg - ou au Ca - destinés aux conducteurs électriques et/ou thermiques

Country Status (5)

Country Link
EP (1) EP0384862B1 (fi)
DE (1) DE69002346T2 (fi)
ES (1) ES2043329T3 (fi)
FI (1) FI900880A0 (fi)
FR (1) FR2643388B1 (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2937460A1 (fr) * 2008-10-16 2010-04-23 Nexans Toron a effet ressort limite.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE698236C (de) * 1938-07-10 1940-11-05 Ver Deutsche Metallwerke Ag Verfahren zur Herstellung eines sauerstofffreien Kupfers hoher Leitfaehigkeit
US4233067A (en) * 1978-01-19 1980-11-11 Sumitomo Electric Industries, Ltd. Soft copper alloy conductors
US4650650A (en) * 1983-10-20 1987-03-17 American Brass Company, L.P. Copper-based alloy with improved conductivity and softening properties

Also Published As

Publication number Publication date
EP0384862A1 (fr) 1990-08-29
FR2643388B1 (fr) 1991-05-03
FR2643388A1 (fr) 1990-08-24
DE69002346D1 (de) 1993-09-02
DE69002346T2 (de) 1993-12-09
ES2043329T3 (es) 1993-12-16
FI900880A0 (fi) 1990-02-21

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