WO2015064357A1 - 銅合金線、銅合金撚線、被覆電線、ワイヤーハーネス及び銅合金線の製造方法 - Google Patents
銅合金線、銅合金撚線、被覆電線、ワイヤーハーネス及び銅合金線の製造方法 Download PDFInfo
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- WO2015064357A1 WO2015064357A1 PCT/JP2014/077380 JP2014077380W WO2015064357A1 WO 2015064357 A1 WO2015064357 A1 WO 2015064357A1 JP 2014077380 W JP2014077380 W JP 2014077380W WO 2015064357 A1 WO2015064357 A1 WO 2015064357A1
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- 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
- H01B7/0009—Details relating to the conductive cores
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
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- 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
- B22D21/002—Castings of light metals
- B22D21/005—Castings of light metals with high melting point, e.g. Be 1280 degrees C, Ti 1725 degrees C
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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
- C22C9/01—Alloys based on copper with aluminium as the next major constituent
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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
- C22C9/02—Alloys based on copper with tin as the next major constituent
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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
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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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
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- 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
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- 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
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- 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
- H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
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- 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
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- 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
- H01B7/0045—Cable-harnesses
Definitions
- the present invention relates to a copper alloy wire, a copper alloy twisted wire, a covered electric wire, and a method for producing a copper alloy wire, and particularly relates to a method suitably used for an automobile electric wire.
- the weight reduction of the electric wire for automobiles can be performed by reducing the diameter of the conductor.
- the diameter of the conductor is simply reduced, there may be cases where requirements such as strength characteristics cannot be satisfied.
- Patent Document 1 proposes a measure for improving the peel force in a conductor in which a plurality of metal strands are twisted together. Specifically, by setting the number of twisted wires to three, the strand diameter of one metal strand is made larger than when using more metal strands, and the strength per strand is increased. It has been proposed to improve ultrasonic weldability by regulating the thickness of the surface oxide film of each metal strand.
- Patent Document 1 is considered to have a certain effect in improving the peel force, there is no disclosure about the response to the impact resistance required for the electric wire for automobiles. Further, Patent Document 1 limits the number of twisted metal strands to three, and there remains a problem that it cannot be applied to a general seven-stranded wire.
- the present invention provides a copper alloy stranded wire, a coated electric wire, a wire harness, and these having high strength and high elongation, high peel strength, and excellent impact resistance even for an electric wire having a relatively small conductor cross-sectional area.
- An object of the present invention is to provide a copper alloy wire and a method for producing the same.
- a first aspect is a copper alloy wire used for a conductor of an automobile electric wire, Fe: 0.4 mass% or more and 2.5 mass% or less, Ti: 0.01% by mass or more and 1.0% by mass or less, 1 type or 2 or more types selected from Mg, Sn, Ag, Ni, In, Zn, Cr, Al, and P: total 0.01% by mass or more and 2.0% by mass or less,
- the balance is a copper alloy wire characterized by being made of Cu and inevitable impurities.
- Another aspect is a copper alloy stranded wire formed by twisting seven of the above copper alloy wires.
- Still another aspect is a copper alloy stranded wire obtained by combining a plurality of the above copper alloy wires, or a conductor wire made of a compression wire formed by compression molding the copper alloy stranded wire, and an insulation coating covering the outer periphery of the conductor wire A coated electric wire characterized by having a layer.
- Still another aspect is a wire harness having the above-described covered electric wire and a terminal portion attached to an end of the covered electric wire.
- Yet another aspect is a method for producing a copper alloy wire used for a conductor of an automobile electric wire, Fe: 0.4 mass% to 2.5 mass%, Ti: 0.01 mass% to 1.0 mass%, selected from Mg, Sn, Ag, Ni, In, Zn, Cr, Al, P 1 type or 2 types or more: a step of forming a cast material containing a total of 0.01% by mass or more and 2.0% by mass or less, with the balance being Cu and inevitable impurities; Forming a wrought material by subjecting the cast material to plastic working; Forming the wire drawing material by subjecting the drawn material to wire drawing; And a step of subjecting the wire drawing material to a heat treatment so that the tensile strength of the wire drawing material is 450 MPa or more and the elongation is 5% or more.
- the chemical composition of the copper alloy wire is positively limited to the specific range. Thereby, it is possible to improve strength, toughness, and impact resistance while suppressing a decrease in wire drawing workability and conductivity.
- the conventional copper alloys aimed at improving the strength are mostly those in which any of the wire drawing workability, conductivity, toughness, and impact resistance is greatly reduced while the strength is improved. Those that satisfy all the characteristics have not been developed.
- the copper alloy wire has an appropriate amount of Fe and Ti, and an appropriate amount of one or more elements selected from Mg, Sn, Ag, Ni, In, Zn, Cr, Al, and P.
- FIG. Explanatory drawing which shows the structure of the covered electric wire in Example 2.
- FIG. Explanatory drawing which shows the other example of a structure of the covered electric wire in Example 2.
- FIG. Explanatory drawing which shows the state which joined the terminal part to the end of the covered electric wire in Example 2.
- FIG. Explanatory drawing which shows the crimp height (C / H) of the adhering part in Example 2.
- FIG. Explanatory drawing which shows the peeling force measuring method in Example 2.
- FIG. Explanatory drawing which shows the measuring method of impact resistance in Example 2.
- Fe 0.4 mass% or more and 2.5 mass% or less
- Fe (iron) is an element effective for improving the strength of the copper material, and in order to obtain the effect, it is necessary to add 0.4% by mass or more, preferably 0.5% by mass or more. Good.
- the Fe content needs to be limited to 2.5% or less, and preferably 1.5% by mass or less. .
- Ti 0.01% by mass or more and 1.0% by mass or less
- Ti titanium
- Ti (titanium) is an element effective for improving the strength of the copper material, like Fe, and it is necessary to add 0.01% by mass or more, preferably 0.1% by mass in order to obtain the effect. It is good to be the above.
- Ti is added too much, wire drawing workability and conductivity are lowered, so the Ti content must be limited to 1.0% or less, and preferably 0.5% by mass or less. .
- Mg manganesium
- Sn titanium
- Sn titanium
- Ni nickel
- In indium
- Zn zinc
- Cr chromium
- Al aluminum
- P phosphorus
- Mg, Sn, Ni, In, Cr, Al, and P have a high strength improvement effect, but excessive addition may cause a decrease in conductivity.
- Ag and Zn have little decrease in electrical conductivity and can be expected to improve the strength. However, excessive addition may cause defects such as scratches during casting.
- the amount added alone is preferably 0.01% by mass or more and 0.5% or less, and more preferably 0.01% by mass or more and 0.2% or less.
- the addition amount by itself is preferably 0.01% by mass or more and 0.7% or less, more preferably 0.01% by mass or more and 0.3% or less. Thereby, the strength improvement effect by Sn addition can be expressed, and the decrease in conductivity due to excessive addition can be prevented.
- the addition amount by itself is preferably 0.01% by mass or more and 1% or less, more preferably 0.01% by mass or more and 0.2% or less.
- the total content is preferably 0.01% by mass to 0.3% by mass, more preferably 0.01% by mass to 0.00%. 2 mass% or less is good. Thereby, the strength improvement effect by addition of these elements can be expressed, and the decrease in electrical conductivity and toughness and the wire drawing workability due to excessive addition can be prevented.
- content of O is 20 ppm or less in said chemical component.
- O content is more preferably 10 ppm or less.
- the copper alloy wire can easily have the following characteristics by adopting the chemical components and the production method described later. That is, the copper alloy can have a tensile strength of 450 MPa or more. Thereby, even if the conductor cross-sectional area of the electric wire comprised from the said copper alloy wire is made small and reduced in weight, the intensity
- the copper alloy wire can have a strand elongation of 5% or more. Therefore, even if the conductor cross-sectional area of the electric wire comprised from the said copper alloy wire is made small and reduced in weight, the impact-resistant energy of the whole electric wire can be maintained in the range sufficient for applying for motor vehicles.
- the copper alloy wire can have a conductivity of 62% IACS or higher. Thereby, even if the conductor cross-sectional area of the electric wire comprised from the said copper alloy wire is made small and reduced in weight, the electroconductivity of the whole electric wire can be maintained in the range sufficient to apply for motor vehicles.
- the copper alloy wire can have a wire diameter of 0.3 mm or less, further 0.25 mm or less, and further 0.20 mm or less. Thereby, the conductor cross-sectional area of the electric wire which consists of a twisted wire using this copper alloy wire can be reduced easily.
- the conductor cross-sectional area can be 0.22 mm 2 or less. This can be realized when the wire diameter of the copper alloy wire is 0.3 mm or less.
- the copper alloy stranded wire can be made to have a total elongation of 10% or more, a peel force of 13 N or more by using the copper alloy wire as a strand, and further, impact energy. Can be set to 5 J / m or more.
- the copper alloy wire includes a copper alloy twisted wire obtained by twisting a plurality of wires, or a conductor wire made of a compression wire formed by compression molding the copper alloy twisted wire, and an insulating coating layer covering the outer periphery of the conductor wire. It can be used in the form of a covered electric wire.
- various known resin materials can be used as the insulating coating layer.
- PVC polyvinyl chloride
- the thickness of the insulating coating layer can be 0.1 mm or more and 0.4 mm or less.
- the above-mentioned covered electric wire can manufacture a wire harness by crimping and fixing a terminal portion to the end portion thereof.
- Various terminal fittings can be used as the terminal portion.
- the said wire harness it is possible to make the terminal adhering force with respect to the said covered electric wire of the said terminal part 50 N or more by providing the high intensity
- a process of forming a cast material of the chemical component is performed.
- electrolytic copper and a mother alloy composed of copper and an additive element are melted, and a reducing agent such as reducing gas or wood is introduced to prepare an oxygen-free copper melt aimed at the above chemical components. After that, this molten metal is cast.
- any casting method such as continuous casting using a movable mold or a frame-shaped fixed mold, or mold casting using a box-shaped fixed mold can be used.
- the molten metal can be rapidly solidified and the additive elements can be dissolved, so that it is not necessary to perform a solution treatment thereafter.
- the obtained cast material is subjected to plastic working to make a wrought material.
- plastic working for example, hot or cold rolling or extrusion can be adopted.
- solution treatment when a cast material is manufactured by methods other than continuous casting, it is preferable to perform solution treatment before, after or before and after the plastic working.
- the obtained wrought material is drawn to obtain a wire drawing material.
- the degree of wire drawing can be appropriately selected according to a desired wire diameter.
- the obtained wire drawing material can be twisted together to make a stranded wire.
- a stranded wire can be compression-molded to obtain a compressed wire.
- the subsequent heat treatment is performed so that the tensile strength of the wire drawing material (element wire) is 450 MPa or more and the elongation is 5% or more.
- This heat treatment can be performed on the wire drawing material, the stranded wire or the compression wire. You may perform at the timing of both after a wire drawing and after twisting.
- This heat treatment is a process of softening to the extent that the strength of the wire, which has been increased by refining the crystal structure and work hardening, is not significantly reduced, and increasing the toughness.
- the total elongation is preferably 10% or more in the state of a stranded wire or a compressed wire.
- the specific conditions for the heat treatment vary depending on the chemical components.
- the heat treatment can be performed at a temperature of 400 ° C. to 500 ° C. for 4 hours to 16 hours.
- the treatment temperature is less than 400 ° C. or when the treatment time is less than 4 hours, the above effect cannot be obtained sufficiently, and it becomes difficult to obtain a desired elongation.
- the treatment temperature exceeds 500 ° C., the precipitates become coarse and the strength may be insufficient. If the processing time exceeds 16 hours, the processing time may become long and the cost may increase.
- Example 1 About the Example which concerns on the said copper alloy wire and its manufacturing method, it demonstrates with a comparative example.
- copper alloy wires having the chemical composition shown in Table 1 were prepared and evaluated.
- Samples 1-1 to 1-17 are Fe: 0.4 mass% to 2.5 mass%, Ti: 0.01 mass% to 1.0 mass%, Mg, Sn, Ag, Ni, In, 1 type or 2 types or more selected from Zn, Cr, Al, and P: total 0.01 mass% or more and 2.0 mass% or less, and the remainder has a chemical component which consists of Cu and an unavoidable impurity. is there.
- sample C101 as a comparative example is a copper alloy in which only Fe and a small amount of Ti are added as alloy elements
- sample C102 is a copper alloy in which only Mg is added as alloy elements.
- electrolytic copper having a purity of 99.99% or more and a mother alloy containing each additive element are put into a high-purity carbon crucible and vacuum-dissolved in a continuous casting apparatus, as shown in Table 1.
- a molten mixture having a composition was prepared.
- the resulting molten mixture was continuously cast using a high purity carbon mold to produce a cast material having a circular cross section with a wire diameter of 16 mm.
- the obtained cast material was swaged to ⁇ 12 mm, and then subjected to a solution treatment for holding at a temperature of 950 ° C. for 1 hour. Then, after drawing to ⁇ 0.215 mm or ⁇ 0.16 mm, a copper alloy wire was obtained by performing heat treatment under the conditions shown in Table 1.
- Samples 1-1 to 1-17 showed excellent characteristics in both tensile strength and elongation, and sufficiently high conductivity.
- sample C101 has very high elongation, it can be seen that the tensile strength is low and it is unsuitable as a wire material for reducing weight by increasing strength.
- Sample C102 has a very high tensile strength, but has a low elongation, and there is a concern about a decrease in impact resistance.
- Example 2 In this example, after preparing a copper alloy wire having the chemical composition shown in Table 2, seven wires were twisted together to produce a stranded wire and evaluated.
- Samples 2-1 to 2-15 are Fe: 0.4 mass% to 2.5 mass%, Ti: 0.01 mass% to 1.0 mass%, Mg, Sn, Ag, Ni, In, 1 type or 2 types or more selected from Zn, Cr, Al, and P: total 0.01 mass% or more and 2.0 mass% or less, and the remainder has a chemical component which consists of Cu and an unavoidable impurity. is there.
- sample C201 as a comparative example is a copper alloy in which only Fe and a small amount of Ti are added as alloy elements
- sample C202 is a copper alloy in which only Mg is added as alloy elements.
- electrolytic copper having a purity of 99.99% or more and a mother alloy containing each additive element are put into a high-purity carbon crucible and melted in a vacuum in a continuous casting apparatus.
- a molten mixture having a composition was prepared.
- the obtained molten mixture was continuously cast using a high-purity carbon mold to produce a cast material having a circular cross section with a wire diameter of 12.5 mm.
- the obtained cast material was subjected to extrusion (or rolling) up to ⁇ 8 mm. Thereafter, it was drawn to ⁇ 0.16 mm or ⁇ 0.215 mm to obtain a copper alloy wire.
- Seven copper alloy wires were twisted together at a twist pitch of 16 mm to form a twisted wire, compression molded, and then heat-treated under the conditions shown in Table 2 to obtain a copper alloy twisted wire.
- the obtained covered electric wire 5 has a cross-sectional shape in which a copper alloy stranded wire 2 formed by twisting seven copper alloy wires 1 and then circularly compressing the same is covered with an insulating coating layer 3. Is.
- a compression process is abbreviate
- the terminal portion 6 was connected to one end of the covered electric wire 5 to produce a wire harness.
- the terminal portion 6 includes an insulation barrel 61 for fixing the insulating coating layer 3 of the coated electric wire 5 and a wire barrel 62 for fixing the conductor wire (copper alloy stranded wire 2) exposed by peeling off the insulating coating layer 3.
- the covered electric wires 5 are fixed by the barrels 61 and 62 by plastically deforming the barrels 61 and 62 using a mold having a predetermined shape (not shown).
- the terminal portion 6 was fixed to the covered electric wire 5 with the setting that the crimp height (C / H) was 0.76, and the wire harness 7 was obtained.
- Impact resistance is carried out by a test method as shown in FIG. A weight w is attached to the tip of the sample S (inter-score distance L: 1 m) (FIG. 6 (a)), and after lifting the weight w upward by 1m (FIG. 6 (b)), it is dropped freely (FIG. 6 ( c)). Then, the weight (kg) of the maximum weight w at which the sample S does not break is measured, and the product value obtained by multiplying the weight by the gravitational acceleration (9.8 m / s 2 )) and the drop distance 1 m is divided by the drop distance. The impact energy was measured and evaluated according to the procedure of evaluating the value as impact resistance (J / m or (N ⁇ m) / m). The obtained results are shown in Table 2.
- the peel force is prepared by preparing three covered electric wires 5 cut to a length of 150 mm, and stripping off the insulating coating layer 3 at one end of each covered electric wire 5 from the end portion by 15 mm. (Copper alloy stranded wire 2) is exposed, and after welding these three conductor wires ultrasonically to form a welded portion 25, as shown in FIG. Tests were performed and measured. Ultrasonic welding was performed under the conditions of pressure 1.2 bar, energy 100 Ws, 65% using [Mini IV] manufactured by Schunk. Further, as shown in FIG.
- the tensile test is performed by pulling two of the three covered electric wires 5 and setting one to a free state at a pulling speed of 10 mm / min until the weld 25 is broken.
- the maximum load was defined as the peel force.
- the measurement was performed 10 times and the average value was used as the peel force for evaluation. The obtained results are shown in Table 2.
- the maximum load at which the terminal portion 6 cannot be pulled out when the covered wire 5 is pulled at a pulling speed of 100 mm / min with the terminal portion 6 fixed is measured. It was the power.
- the contact resistance between the conductor and the terminal was also measured. This was measured by passing a low voltage constant current of 20 mV and 10 mA through the fixed part. The obtained results are shown in Table 3.
- Samples 2-1 to 2-15 are excellent in both tensile strength and total elongation, and exhibit excellent properties in all of conductivity, peel force, and impact resistance. It was. On the other hand, although the sample C201 had a very high total elongation, the tensile strength was low and the peel strength and impact resistance were also inferior. Sample C202 had a very high tensile strength but a low total elongation and a very low impact resistance.
- Samples 2-1 to 2-15 had very good results in terms of both terminal strength and contact resistance.
- Sample C202 was also good in both the terminal portion fixing force and contact resistance.
- Sample C201 had a very low adhesion force.
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Abstract
Description
Fe:0.4質量%以上2.5質量%以下、
Ti:0.01質量%以上1.0質量%以下、
Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、
残部がCu及び不可避不純物からなることを特徴とする銅合金線にある。
Fe:0.4質量%以上2.5質量%以下、Ti:0.01質量%以上1.0質量%以下、Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、残部がCu及び不可避不純物からなる鋳造材を形成する工程と、
上記鋳造材に塑性加工を施して展伸材を形成する工程と、
上記展伸材に伸線加工を施して伸線材を形成する工程と、
上記伸線材の引張強さが450MPa以上、かつ、伸びが5%以上となるように上記伸線材に熱処理を施す工程とを有することを特徴とする銅合金線の製造方法にある。
Fe(鉄)は、銅材料の強度向上に有効な元素であり、その効果を得るために0.4質量%以上添加することが必要であり、好ましくは0.5質量%以上とするのがよい。一方、Feを添加しすぎると、伸線加工性や導電性の低下を招くため、Fe含有量は2.5%以下に制限することが必要であり、好ましくは1.5質量%以下がよい。
Ti(チタン)は、Feと同様に、銅材料の強度向上に有効な元素であり、その効果を得るために0.01質量%以上添加することが必要であり、好ましくは0.1質量%以上とするのがよい。一方、Tiを添加しすぎると、伸線加工性や導電性の低下を招くため、Ti含有量は1.0%以下に制限することが必要であり、好ましくは0.5質量%以下がよい。
Mg(マグネシウム)、Sn(スズ)、Ag(銀)、Ni(ニッケル)、In(インジウム)、Zn(亜鉛)、Cr(クロム)、Al(アルミニウム)、P(リン)は、いずれも、銅材料の強度、靱性、耐衝撃性の向上に有効な元素であり、1種又は2種以上を合計0.01質量%以上添加する。一方、これら各元素を添加しすぎると、他の特性を低下させるおそれがあるため、合計含有量は2.0質量%以下に制限する。Mg、Sn、Ni、In、Cr、Al、Pは、強度向上効果が高い一方、過剰な添加が導電率の低下を招くおそれがある。Ag、Znは、導電率の低下が少なく、強度向上効果が見込めるが、過剰添加は鋳造時のキズ等の欠陥を招くおそれがある。
上記銅合金線及びその製造方法に係る実施例につき、比較例と共に説明する。本例では、表1に示す化学成分組成を有する銅合金線を作製して評価した。試料1-1~1-17は、Fe:0.4質量%以上2.5質量%以下、Ti:0.01質量%以上1.0質量%以下、Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、残部がCu及び不可避不純物からなる化学成分を有するものである。一方、比較例としての試料C101は、Fe及び少量のTiのみを合金元素として加えた銅合金であり、試料C102は、Mgのみを合金元素として加えた銅合金である。
本例では、表2に示す化学成分組成を有する銅合金線を作製した後、7本撚り合わせて撚り線を作製して評価した。試料2-1~2-15は、Fe:0.4質量%以上2.5質量%以下、Ti:0.01質量%以上1.0質量%以下、Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、残部がCu及び不可避不純物からなる化学成分を有するものである。一方、比較例としての試料C201は、Fe及び少量のTiのみを合金元素として加えた銅合金であり、試料C202は、Mgのみを合金元素として加えた銅合金である。
Claims (16)
- 自動車用電線の導体に用いられる銅合金線であって、
Fe:0.4質量%以上2.5質量%以下、
Ti:0.01質量%以上1.0質量%以下、
Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、
残部がCu及び不可避不純物からなることを特徴とする銅合金線。 - Oの含有量が20ppm以下であることを特徴とする請求項1に記載の銅合金線。
- 引張強さが450MPa以上であることを特徴とする請求項1又は2に記載の銅合金線。
- 素線伸びが5%以上であることを特徴とする請求項1~3のいずれか1項に記載の銅合金線。
- 導電率が62%IACS以上であることを特徴とする請求項1~4のいずれか1項に記載の銅合金線。
- 線径が0.3mm以下であることを特徴とする請求項1~5のいずれか1項に記載の銅合金線。
- 請求項1~6のいずれか1項に記載の銅合金線を7本撚り合わせてなることを特徴とする銅合金撚線。
- 導体断面積が0.22mm2以下であることを特徴とする請求項7に記載の銅合金撚線。
- 全伸びが10%以上であることを特徴とする請求項7又は8に記載の銅合金撚線。
- ピール力が13N以上であることを特徴とする請求項7~9のいずれか1項に記載の銅合金撚線。
- 耐衝撃エネルギーが5J/m以上であることを特徴とする請求項7~10のいずれか1項に記載の銅合金撚線。
- 請求項1~6のいずれか1項に記載の銅合金線を複数本撚り合わせた銅合金撚線、又は該銅合金撚線を圧縮成形してなる圧縮線材よりなる導体線と、
該導体線の外周を覆う絶縁被覆層と、を有することを特徴とする被覆電線。 - 請求項12に記載の被覆電線と、
該被覆電線の端部に装着された端子部と、を有することを特徴とするワイヤーハーネス。 - 上記端子部の上記被覆電線に対する端子固着力が50N以上であることを特徴とするワイヤーハーネス。
- 自動車用電線の導体に用いられる銅合金線の製造方法であって、
Fe:0.4質量%以上2.5質量%以下、Ti:0.01質量%以上1.0質量%以下、Mg、Sn、Ag、Ni、In、Zn、Cr、Al、Pから選択される1種又は2種以上:合計0.01質量%以上2.0質量%以下、を含有し、残部がCu及び不可避不純物からなる鋳造材を形成する工程と、
上記鋳造材に塑性加工を施して展伸材を形成する工程と、
上記展伸材に伸線加工を施して伸線材を形成する工程と、
上記伸線材の引張強さが450MPa以上、かつ、伸びが5%以上となるように上記伸線材に熱処理を施す工程とを有することを特徴とする銅合金線の製造方法。 - 上記鋳造材は、Oの含有量が20ppm以下であることを特徴とする請求項16に記載の銅合金線の製造方法。
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CN201480059682.1A CN105705665B (zh) | 2013-11-01 | 2014-10-15 | 铜合金线、铜合金绞合线、包覆电线、线束以及铜合金线的制造方法 |
EP14858528.4A EP3064604A4 (en) | 2013-11-01 | 2014-10-15 | Copper alloy wire, copper alloy stranded wire, coated electric wire, wire harness and manufacturing method of copper alloy wire |
KR1020167011497A KR20160070089A (ko) | 2013-11-01 | 2014-10-15 | 구리 합금선, 구리 합금 연선, 피복 전선, 와이어 하니스 및 구리 합금선의 제조 방법 |
US15/033,472 US20160254074A1 (en) | 2013-11-01 | 2014-10-15 | Copper alloy wire, copper alloy stranded wire, coated electric wire, wire harness, and method for producing copper alloy wire |
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EP3064604A1 (en) | 2016-09-07 |
JP2015086452A (ja) | 2015-05-07 |
US20160254074A1 (en) | 2016-09-01 |
CN105705665A (zh) | 2016-06-22 |
EP3064604A4 (en) | 2017-02-22 |
CN105705665B (zh) | 2018-06-19 |
KR20160070089A (ko) | 2016-06-17 |
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