WO2014007258A1 - 銅合金線材及びその製造方法 - Google Patents

銅合金線材及びその製造方法 Download PDF

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Publication number
WO2014007258A1
WO2014007258A1 PCT/JP2013/068159 JP2013068159W WO2014007258A1 WO 2014007258 A1 WO2014007258 A1 WO 2014007258A1 JP 2013068159 W JP2013068159 W JP 2013068159W WO 2014007258 A1 WO2014007258 A1 WO 2014007258A1
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Prior art keywords
wire
heat treatment
mass
copper alloy
alloy wire
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PCT/JP2013/068159
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English (en)
French (fr)
Japanese (ja)
Inventor
司 ▲高▼澤
聡 勅使河原
俊郎 阿部
修司 富松
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古河電気工業株式会社
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Priority to JP2013554697A priority Critical patent/JP5840234B2/ja
Priority to CN201380015359.XA priority patent/CN104169448B/zh
Priority to KR1020147026033A priority patent/KR101719888B1/ko
Priority to EP13812970.5A priority patent/EP2868757B1/en
Publication of WO2014007258A1 publication Critical patent/WO2014007258A1/ja

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • 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
    • 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 a copper alloy wire and a method for manufacturing the same, and more particularly to an ultrafine copper alloy wire for a magnet wire and a method for manufacturing the same.
  • a coil for a microspeaker used in a mobile phone, a smartphone, or the like is manufactured by winding an extra fine wire (magnet wire) having a wire diameter of 0.1 mm or less into a coil shape.
  • This winding processing requires toughness (elongation) as the workability that allows the formation of turns, and conventionally pure copper having excellent toughness has been used.
  • pure copper is excellent in electrical conductivity, it has a low strength, so there is a problem that fatigue resistance accompanying coil vibration is low.
  • Patent Document 1 a technique using a high concentration Cu—Ag alloy containing 2 to 15 mass% of Ag that can increase the tensile strength without decreasing the conductivity is proposed.
  • a processed metal or alloy has an increased tensile strength and a reduced elongation.
  • a heat treatment at a certain temperature or higher is applied thereto, the elongation is restored and the strength is decreased.
  • Patent Document 2 a technique has been proposed in which the strength and elongation are compatible even with a low-concentration alloy by performing the heat treatment temperature below the softening temperature.
  • this method is difficult to control the heat treatment temperature and time.
  • Patent Document 3 A technique for performing a softening process has been proposed (Patent Document 3).
  • JP 2009-280860 A Japanese Patent No. 3944304 Japanese Examined Patent Publication No. 4-77060
  • the method of semi-softening by adding a small amount of Zr to a low concentration Cu—Ag alloy can easily achieve both elongation and strength, but is insufficient in terms of increasing the strength.
  • the shape of the magnet wire is not limited to a round wire, and the use of a square wire or a flat wire is also being studied. Also in the case of these square wires and flat wires, it is required that the wire be thin enough to correspond to the diameter of the round wire.
  • the present invention has been made in view of the problems in the prior art, and an object thereof is to provide a copper alloy wire excellent in strength, elongation, and conductivity, for example, suitable for a magnet wire, at low cost. .
  • the present inventors diligently studied various copper alloys and heat treatment conditions in order to develop copper alloy wires suitably used for magnet wires and the like that are superior in strength, elongation, and conductivity compared to conventional alloy wires. .
  • a Cu—Ag—Mg alloy wire is subjected to a semi-softening treatment, the elongation and strength are excellent, and the characteristics can be easily realized by heat treatment.
  • the present inventors have thus obtained a copper alloy wire that is excellent in strength, conductivity, and elongation, for example, suitable for use as a magnet wire, by adding Ag and Mg to Cu in a predetermined composition and semi-softening treatment. I found out that The present invention has been completed based on this finding.
  • the copper alloy wire according to (1) which has a wire diameter of 0.1 mm or less (in the case of a round wire) or a wire thickness (in the case of a square wire or a flat wire).
  • the copper alloy wire according to Item The copper alloy wire according to Item.
  • the semi-softened state means a state in which the elongation of the copper alloy wire satisfies 7% to 30%.
  • Semi-softening treatment refers to heat treatment that gives the semi-softening state.
  • the semi-softening temperature range refers to a heat treatment temperature in a range that gives a state where the copper alloy wire after the heat treatment satisfies elongation of 7% to 30%.
  • the softening temperature refers to a heat treatment temperature that gives a state in which the tensile strength does not decrease any more in the copper alloy wire after the heat treatment. Referring to FIG. 3, the heat treatment temperature at which the slope becomes 0 (zero) in the tensile strength reduction curve is the softening temperature.
  • the heat treatment temperature range refers to a temperature range in which a desired strength is maintained after the heat treatment in the semi-softening temperature range. However, when subjected to heat treatment at a high temperature exceeding this softening temperature (a temperature on the right side of the softening temperature in FIG. 3), the tensile strength is further reduced due to overheating.
  • the softened state means a state in which the elongation of the copper alloy wire has been recovered by exceeding 30%.
  • the softening treatment refers to a heat treatment at a high temperature that gives the softened state.
  • the wire means a square wire or a flat wire in addition to the round wire.
  • the wire of the present invention refers to a round wire, a square wire, and a flat wire unless otherwise specified.
  • the size of the wire is a round wire (the cross section in the width direction (TD) is circular), the wire diameter ⁇ (the diameter of the circle in the cross section) of the round wire, and a square (the cross section in the width direction is a square).
  • the thickness t and width w of the square wire (both are the same as the length of one side of the square of the cross section), and if it is a flat wire (the cross section in the width direction is rectangular), the thickness of the flat wire It refers to the length t (the length of the short side of the rectangle of the cross section) and the width w (the length of the long side of the rectangle of the cross section).
  • the Cu—Ag—Mg alloy wire of the present invention is suitable as, for example, a copper alloy wire for a magnet wire because it is excellent in tensile strength, elongation, and conductivity.
  • the performance can be exhibited with a small amount of Ag compared to a conventional Cu-Ag alloy wire with a large amount of Ag, it can be manufactured at a lower cost.
  • the method for producing a Cu—Ag—Mg alloy wire of the present invention since the temperature range for performing the semi-softening heat treatment is wide, a stable Cu—Ag—Mg alloy having excellent performance and less variation in performance. A wire can be manufactured.
  • FIG. 5 is a graph showing a comparison between the content of Ag and the tensile strength at the time of semi-softening for a comparative Cu—Ag alloy wire containing no Mg and a Cu—Ag—Mg alloy wire of the present invention containing Mg. is there.
  • Cu-1% Ag-0.1% Mg with a wire diameter of 0.1 mm (where% means mass%, the same applies hereinafter) Changes in strength and elongation when a round wire is heat-treated at various temperatures
  • FIG. 5 is a graph showing a comparison between the content of Ag and the tensile strength at the time of semi-softening for a comparative Cu—Ag alloy wire containing no Mg and a Cu—Ag—Mg alloy wire of the present invention containing Mg. is there.
  • Cu-1% Ag-0.1% Mg with a wire diameter of 0.1 mm (where% means mass%, the same applies hereinafter) Changes in strength and elongation when a round wire is heat-
  • Ag is 0.5% by mass or more (preferably 0.5 to 4.0% by mass), and Mg is 0.05% by mass or more (preferably 0.05 to 0.5% by mass). And the remainder consists of Cu and inevitable impurities.
  • the Ag content is 0.5% by mass or more, preferably 0.5 to 4.0% by mass, and more preferably 0.5 to 2.0% by mass. When Ag is too small, sufficient strength cannot be obtained. Moreover, when there is too much Ag content, while electroconductivity will fall, cost will become high too much.
  • the heat treatment temperature becomes too high, and the heat treatment becomes difficult.
  • Mg the tensile strength at the time of semi-softening is improved, and an ultrafine magnet wire excellent in strength can be obtained.
  • the semi-softening temperature range is expanded, and the heat treatment temperature range for obtaining the characteristics required for the ultrafine magnet wire (tensile strength of 350 MPa or more and elongation of 7% or more) is widened, and stable production becomes possible.
  • the Mg content is 0.05% by mass or more, preferably 0.05 to 0.5% by mass, and more preferably 0.05 to 0.3% by mass. When the Mg content is too small, the effect of increasing the strength during semi-softening and expanding the semi-softening temperature range is insufficient. Moreover, when there is too much Mg content, electroconductivity will fall remarkably.
  • Ag is 0.5% by mass or more (preferably 0.5 to 4.0% by mass), and Mg is 0.05% by mass or more (preferably 0.05 to 0.5%).
  • Mass%), Sn, Zn, In, Ni, Co, Zr and Cr at least one selected from the group consisting of 0.05 to 0.3 mass%, with the balance being Cu and inevitable impurities
  • An alloy composition consisting of
  • At least one element selected from the group consisting of Sn, Zn, In, Ni, Co, Zr, and Cr is an optional additive element in the copper alloy according to the present invention.
  • the content of these elements is 0.05 to 0.3%, preferably 0.05 to 0.2% as each content. When this content is too small as each content, the effect of the strength increase by addition of these elements is hardly expected. Further, if the content is too large, the decrease in conductivity is too large, so that it is not suitable as a copper alloy wire such as a magnet wire.
  • These elements are solid solution strengthening type or precipitation strengthening type elements, respectively, and by adding these elements to Cu, the strength can be increased without significantly reducing the conductivity. This addition increases the strength of the copper alloy wire itself and improves the bending fatigue resistance.
  • the reason why the tensile strength of the copper alloy wire of the present invention is set to 350 MPa or more is that when it is less than 350 MPa, the strength when the diameter is reduced by wire drawing is insufficient, and the bending fatigue resistance is inferior. Further, the reason why the elongation of the copper alloy wire of the present invention is set to 7% or more is that if it is less than 7%, the workability is inferior and problems such as breakage occur when the coil is formed.
  • the manufacturing method of the copper alloy wire of the present invention will be described.
  • the shape of the copper alloy wire of the present invention is not limited to a round wire, and may be a square wire or a flat wire, which will be described below.
  • the method for producing a copper alloy round wire according to the present invention includes, for example, casting, cold working (cold drawing), intermediate heat treatment (intermediate annealing), and final heat treatment (final annealing) in this order.
  • intermediate annealing may be omitted.
  • the first and second cold working Intermediate annealing may be performed during this period.
  • the heat treatment method for performing the intermediate annealing is roughly classified into a batch type and a continuous type. Batch-type heat treatment is inferior in productivity because it takes processing time and cost, but it is easy to control characteristics because temperature and holding time are easy to control.
  • continuous heat treatment is excellent in productivity because it can be performed continuously with the wire drawing process, but since heat treatment needs to be performed in an extremely short time, the heat treatment temperature and time are accurately controlled to stabilize the characteristics. It needs to be realized.
  • a heat treatment method suitable for the purpose may be selected.
  • the heat treatment it is preferable to perform the heat treatment at 300 to 600 ° C. for 30 minutes to 2 hours in a heat treatment furnace in an inert atmosphere such as nitrogen or argon.
  • the continuous heat treatment include an electric heating method and an in-atmosphere heat treatment method.
  • the electric heating method is a method in which an electrode ring is provided in the middle of the wire drawing process, a current is passed through the copper alloy wire passing between the electrode wheels, and heat treatment is performed by Joule heat generated in the copper alloy wire itself.
  • a heating container is provided in the middle of wire drawing, and the copper alloy wire is passed through the heating container atmosphere heated to a predetermined temperature (for example, 300 to 600 ° C.) to perform heat treatment.
  • the heat treatment is preferably performed in an inert gas atmosphere in order to prevent oxidation of the copper alloy wire.
  • the heat treatment time since the heat treatment time is short, it is preferable to perform the heat treatment at 300 to 700 ° C. for 0.1 to 5 seconds.
  • the heating temperature and heating holding time in the finish annealing are appropriately adjusted so that the elongation of the copper alloy wire obtained by the final heat treatment is 7 to 30%, preferably 10 to 20%.
  • the final heat treatment is performed at a higher temperature when the heat treatment time is short, and at a lower temperature when the heat treatment time is long.
  • the heat treatment time since the heat treatment time is short, it is preferable to perform the heat treatment at 300 to 700 ° C. for 0.1 to 5 seconds.
  • the heat treatment time can be long, and it is preferable to perform the heat treatment at 300 to 600 ° C. for 30 to 120 minutes.
  • the manufacturing method of the copper alloy rectangular wire of the present invention is the same as the manufacturing method of the round wire, except that it has a rectangular wire processing step.
  • the method for producing a flat wire according to the present invention includes, for example, casting, cold working (cold drawing), flat wire working, and final heat treatment (final annealing) in this order. If necessary, intermediate annealing (intermediate heat treatment) may be inserted between the cold working and the rectangular wire working, as in the method for producing the round wire.
  • the conditions of processing and heat treatment in each step of casting, cold working, intermediate annealing, and final annealing, and preferred conditions thereof are the same as in the method of manufacturing the round wire.
  • the rolling reduction and the total rolling reduction in each pass during rolling or the like are not particularly limited, and may be set as appropriate so that a desired rectangular wire size can be obtained.
  • the rolling reduction is the rate of change in the thickness in the rolling direction when flattening is performed, and the rolling reduction when the thickness before rolling is t 1 and the thickness of the line after rolling is t 2. (%) Is represented by ⁇ 1- (t 2 / t 1 ) ⁇ ⁇ 100.
  • the total rolling reduction can be 10 to 90%, and the rolling reduction in each pass can be 10 to 50%.
  • the cross-sectional shape of the rectangular wire is not particularly limited, but the aspect ratio is usually 1 to 50, preferably 1 to 20, and more preferably 2 to 10.
  • the aspect ratio (expressed as w / t below) is the ratio of the short side to the long side of the rectangle forming the cross-section (TD) cross section of the flat wire.
  • the thickness t of the flat wire is equal to the short side of the rectangle forming the width direction (TD) cross section
  • the width w of the flat wire is the length of the rectangle forming the cross section of the width direction (TD). Equal to edge.
  • the thickness of the flat wire is usually 0.1 mm or less, preferably 0.07 mm or less, more preferably 0.05 mm or less.
  • the width of the flat wire is usually 1 mm or less, preferably 0.7 mm or less, more preferably 0.5 mm or less.
  • winding a flat wire in the thickness direction means winding the flat wire in a coil shape with the width w of the flat wire being the width of the coil.
  • Each of the processing rates in the first and second cold wire drawing processes varies depending on the target wire diameter or wire thickness and copper alloy composition, as well as two heat treatment conditions of intermediate annealing and finish annealing.
  • the processing rate in the first cold working (drawing) is normally set to 70.0 to 99.9%
  • the processing rate in the second cold working (drawing) Is 70.0 to 99.9%.
  • a plate material or strip material having a predetermined alloy composition can be manufactured, and these plates or strips can be slit to obtain a rectangular wire material or a rectangular wire material having a desired line width.
  • this manufacturing process for example, there is a method comprising casting, hot rolling, cold rolling, finish annealing, and slit processing. If necessary, intermediate annealing may be performed during the cold rolling. In some cases, the slit processing may be performed before the finish annealing.
  • FIG. 3 shows changes in strength (tensile strength) and elongation when a Cu-1% Ag-0.1% Mg round wire having a diameter of 0.1 mm is heat-treated at various temperatures. If the heat treatment is performed at a temperature lower than the heat treatment possible temperature range, the strength is high, but the elongation does not sufficiently occur, so that a problem occurs when the coil is formed. In addition, when the heat treatment is performed at a temperature higher than the heat treatment possible temperature range, the elongation is increased, but the strength is greatly reduced, so that a problem occurs at the time of forming the coil, or the fatigue resistance is lowered and the life of the coil is reduced. .
  • wire diameter or wire thickness is 0.1 mm or less, More preferably, it is 0.07 mm or less, More preferably, it is 0.05 mm or less.
  • the lower limit of the wire diameter or the wire thickness is not particularly limited, but is usually 0.01 mm or more in the current technology.
  • the use of the copper alloy wire of the present invention is not particularly limited, and examples thereof include a magnet wire that is an extra fine wire used for a speaker coil used in a mobile phone, a smartphone, and the like.
  • the cast material contains 0.5 to 4.0% by mass of Ag, 0.05 to 0.5% by mass of Mg, and the balance of the example of the present invention having the alloy composition shown in Table 1 consisting of Cu and inevitable impurities.
  • a Cu—Ag—Mg alloy and a copper alloy of a comparative example having the alloy composition shown in Table 1 were each cast into a rough drawn wire having a diameter of 10 mm by a horizontal continuous casting method. This rough drawn wire is subjected to cold working (drawing) (total working rate of the following first and second cold workings: 99.984%), intermediate annealing and finish annealing, and a round wire sample having a diameter of 40 ⁇ m is obtained. Produced.
  • the heat treatment of intermediate annealing and finish annealing was performed in any of three patterns selected from batch annealing, current annealing, and running annealing, and each was performed in a nitrogen atmosphere.
  • the intermediate annealing was performed only once between the first cold working (drawing) and the second cold working (drawing).
  • Table 1 there are some that have been subjected to intermediate annealing and those that have not.
  • the balance between elongation and strength varies greatly depending on the heat treatment conditions. Therefore, the heat treatment conditions were adjusted so that the elongation was relatively close to 13 to 18%.
  • Examples of other round wires include at least one selected from the group consisting of optional additive elements Sn, Zn, In, Ni, Co, Zr and Cr in addition to Ag and Mg, with the balance being Cu and inevitable impurities
  • a Cu—Ag—Mg— (Sn, Zn, In, Ni, Co, Zr or Cr) alloy of the present invention having the alloy composition shown in Table 2 and a comparative example having the alloy composition shown in Table 2 Were produced in the same manner as described above.
  • Examples of rectangular wires, comparative examples In the same manner as the round wire, except that after roughing the wire (drawing), or after intermediate annealing, if it is performed, after performing rectangular wire processing, finish annealing, A flat wire sample was prepared. As shown in Table 3, there are those that have been subjected to intermediate annealing and those that have not. Moreover, even in the appropriate heat treatment temperature range defined in the present invention, the balance between elongation and strength varies greatly depending on the heat treatment conditions. Therefore, the heat treatment conditions were adjusted so that the elongation was relatively close to 13 to 18%. As shown in Table 3, the flat wire processing is performed by cold rolling the wire diameter ⁇ (mm) of the round wire before the processing into a flat wire having a size of width w (mm) ⁇ thickness t (mm). processed.
  • CP ⁇ 20 (Tensile strength of copper alloy wire-350) (MPa) / Ag content (mass%)
  • CP ⁇ 20 is “ ⁇ (excellent)”
  • 10 ⁇ CP ⁇ 20 is “ ⁇ (good)”
  • 0 ⁇ CP ⁇ 10 is “ ⁇ (slightly inferior)”
  • CP ⁇ 0 is “ ⁇ (inferior)”. ) ”.
  • the coil life was evaluated by measuring the number of bending fatigue fractures using the test method shown in FIG.
  • a copper alloy wire sample having a wire diameter ⁇ or a wire thickness t of 0.04 mm (40 ⁇ m) is sandwiched between dies as a sample, and a 20 g weight (W )) And applied a load.
  • W 20 g weight
  • the sample was set so as to be sandwiched between dies in the wire thickness direction (ND).
  • the upper end of the sample was fixed with a connector. In this state, the sample was bent 90 degrees to the left and right, repeatedly bent at a rate of 100 times per minute, and the number of bending until breaking was measured for each sample.
  • the number of bendings was counted as one round trip of 1 ⁇ 2 ⁇ 3 in the figure, and the interval between the two dies was set to 1 mm so as not to press the copper alloy wire sample during the test.
  • the determination of breakage was made when the weight suspended at the lower end of the sample dropped.
  • the bending radius (R) was set to 1 mm, 4 mm, or 6 mm depending on the curvature of the die. “ ⁇ (excellent)” if the number of breaks is 201 times or more, “ ⁇ (good)” if it is 151 to 200 times, “ ⁇ (somewhat inferior)” if it is 101 to 150 times, and less than 100 times Was evaluated as “ ⁇ (poor)”.
  • those having a tensile strength of less than 350 MPa or an elongation of less than 7% are “x (poor)”
  • those having a tensile strength of 350 MPa to less than 370 MPa and an elongation of 7% or more are “ ⁇ (good)”
  • tensile strength of 370 MPa or more and elongation are “ ⁇ (excellent)”.
  • Those having a conductivity of 7% or more and a conductivity of 75% IACS or more were evaluated as “ ⁇ (excellent) ”.
  • Comprehensive evaluation is based on the above cost performance, coil life and coil performance, and it is " ⁇ (excellent)", then " ⁇ (good)”, “ ⁇ ” (Slightly inferior) ”and“ ⁇ (poor) ”.
  • the copper alloy wires of the present invention containing Mg have higher strength than the copper alloy wires of the comparative examples not containing Mg. .
  • the copper alloy wire of the present invention is superior in balance between conductivity and strength to the conventional Cu—Ag alloy wire. From these, it can be seen that the copper alloy wire of the present invention can exhibit the same performance as the high concentration Cu—Ag alloy wire of the comparative example with a smaller Ag content, that is, at a lower cost. Focusing on the heat treatment temperature, the Cu—Ag—Mg alloy wire manufactured according to the manufacturing method of the present invention is approximately 50 ° C.
  • Comparative Examples 1 to 5 those in which at least one of the Ag content and the Mg content is insufficient as in Comparative Examples 1 to 5 cannot obtain sufficient strength even by semi-softening heat treatment, and are used as ultrafine magnet wires. Can not do it. Further, as can be seen from Comparative Examples 6 to 15, when the Mg content is less than 0.05% by mass, the effect of improving the semi-softening property by adding Mg can hardly be obtained.
  • Comparative Example 7 Comparative Examples 9 to 12, and Comparative Examples 14 to 15 are comparative examples of alloy compositions that imitate Patent Document 1, respectively.
  • Comparative Example 16 is a comparative example of the alloy composition imitating Patent Document 3 and Comparative Example 17 is that of Patent Document 2.
  • Comparative Example 18 was a comparative example in which neither the intermediate annealing nor the finish annealing was performed, but the elongation was insufficient and the result was that it could not be used as an ultrafine magnet wire.
  • an alloy of Cu—Ag—Mg is obtained by adding at least one element selected from the group consisting of Sn, Zn, In, Ni, Co, Zr and Cr to the optional additive element Sn to Cu—Ag—Mg alloy. It can be seen that when the corresponding compositions are compared (for example, Example 101 for Example 2, Example 102 for Example 3, etc.), the tensile strength is improved. Although not shown in the table, when the content of Sn among the optional additive elements is too large, the conductivity is inferior.
  • Table 4 shows magnet wire formability when the wire diameters of the present invention and the comparative Cu-Ag-Mg alloy wire (round wire) and the comparative Cu-Ag alloy wire (round wire) are variously changed.
  • the results of the impact on “ ⁇ (excellent)” indicates that no defects such as disconnection occurred when the copper alloy wire of each test material was formed into a coil, “ ⁇ (good)” indicates that disconnection occurred very rarely, and often The case where the disconnection occurred was evaluated as “ ⁇ (slightly inferior)”, and the case where the coil could not be formed was evaluated as “ ⁇ (inferior)”.
  • the Cu—Ag—Mg alloy wire according to the present invention has a wire diameter larger than that of the Cu—Ag alloy wire of the comparative example. It can be seen that even if it is smaller, the coil can be formed without disconnection. In the case of a rectangular wire, the same result as in the case of the round wire can be obtained.
  • Table 5 shows a Cu-Ag-Mg alloy wire according to the present invention and, as a comparison, a Cu-Ag alloy wire and a Cu-Ag-Mg alloy wire (both with insufficient Mg content) at various temperatures by a batch method.
  • the result of having measured the heat treatment temperature range in which the heat treatment was performed for 30 minutes and the tensile strength of 350 MPa or more and the elongation of 7% or more could be achieved at the same time is shown. It can be seen that the Cu—Ag—Mg alloy wire according to the present invention has a heat treatment temperature range equal to or wider than that of the conventional high concentration Cu—Ag alloy wire for comparison, although the Ag concentration is low.
  • the obtained Cu—Ag—Mg alloy wire can be easily subjected to a semi-softening treatment that can achieve both desired elongation and strength under a wider heat treatment temperature range. It can be seen that a stable product can be manufactured.

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PCT/JP2013/068159 2012-07-02 2013-07-02 銅合金線材及びその製造方法 WO2014007258A1 (ja)

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Application Number Priority Date Filing Date Title
JP2013554697A JP5840234B2 (ja) 2012-07-02 2013-07-02 銅合金線材及びその製造方法
CN201380015359.XA CN104169448B (zh) 2012-07-02 2013-07-02 铜合金线材及其制造方法
KR1020147026033A KR101719888B1 (ko) 2012-07-02 2013-07-02 구리합금 선재 및 그 제조방법
EP13812970.5A EP2868757B1 (en) 2012-07-02 2013-07-02 Copper-alloy wire rod and manufacturing method therefor

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JP2012-148919 2012-07-02

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Cited By (5)

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CN104046842A (zh) * 2014-06-05 2014-09-17 锐展(铜陵)科技有限公司 一种汽车电子仪表用高镍铜合金线的制备方法
WO2015152166A1 (ja) * 2014-03-31 2015-10-08 古河電気工業株式会社 銅合金線材及びその製造方法
CN106029930A (zh) * 2014-02-28 2016-10-12 株式会社自动网络技术研究所 铜合金绞线及其制造方法、汽车用电线
WO2017199906A1 (ja) * 2016-05-16 2017-11-23 古河電気工業株式会社 銅系合金線材
CN114369735A (zh) * 2021-12-16 2022-04-19 虹华科技股份有限公司 一种电子芯片用高纯铜铜丝的加工工艺

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JP6284691B1 (ja) * 2016-05-16 2018-02-28 古河電気工業株式会社 銅系合金線材
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CN114369735A (zh) * 2021-12-16 2022-04-19 虹华科技股份有限公司 一种电子芯片用高纯铜铜丝的加工工艺

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KR20150030188A (ko) 2015-03-19
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