WO2017221819A1 - アルミニウム合金導電線、これを用いた電線及びワイヤハーネス - Google Patents
アルミニウム合金導電線、これを用いた電線及びワイヤハーネス Download PDFInfo
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- WO2017221819A1 WO2017221819A1 PCT/JP2017/022259 JP2017022259W WO2017221819A1 WO 2017221819 A1 WO2017221819 A1 WO 2017221819A1 JP 2017022259 W JP2017022259 W JP 2017022259W WO 2017221819 A1 WO2017221819 A1 WO 2017221819A1
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- mass
- aluminum alloy
- wire
- alloy conductive
- conductive wire
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 109
- 239000004020 conductor Substances 0.000 title claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 20
- 229910052796 boron Inorganic materials 0.000 claims abstract description 18
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 description 50
- 238000010438 heat treatment Methods 0.000 description 38
- 238000005491 wire drawing Methods 0.000 description 29
- 239000011777 magnesium Substances 0.000 description 28
- 239000010936 titanium Substances 0.000 description 20
- 239000010949 copper Substances 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium 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
- H01B1/023—Alloys based on aluminium
-
- 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
-
- 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
-
- 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
Definitions
- the present invention relates to an aluminum alloy conductive wire, an electric wire and a wire harness using the same.
- Patent Document 1 As such an aluminum alloy conductive wire, for example, one disclosed in Patent Document 1 below is known.
- Patent Document 1 below includes a total of at least one element selected from 0.03 to 1.5% by mass of Mg, 0.02 to 2.0% by mass of Si, Cu, Fe, Cr, Mn, and Zr. 0.1 to 1.0% by mass, electrical conductivity is 40% IACS or more, tensile strength is 150 MPa or more, elongation is 5% or more, wire diameter is 0.5 mm or less, and maximum crystal grain size is 50 ⁇ m or less.
- An aluminum alloy conductive wire is disclosed.
- Patent Document 1 the aluminum alloy conductive wire described in Patent Document 1 showed a decrease in strength after the heat resistance test, and had room for improvement in terms of heat resistance.
- the present invention has been made in view of the above circumstances, and an object thereof is to provide an aluminum alloy conductive wire having excellent heat resistance, an electric wire and a wire harness using the same.
- the present inventor has intensively studied with a particular focus on the Mg content in the aluminum alloy conductive wire.
- the inventors set the content ratios of Si, Fe, Cu and Mg to a specific range, the total content ratio of Ti, V and B to a specific value or less, and the tensile strength. It has been found that the above problem can be solved when a specific relationship is established with respect to the formula using the Mg content and the conductivity is a specific relationship with respect to the equation using the Mg content.
- Si is 0.15 to 0.25% by mass
- Fe is 0.6 to 0.9% by mass
- Cu is 0.05 to 0.15% by mass.
- T 1 59.5 ln (x) +231
- C 1.26x 2 -11.6x + 63.4 (2)
- the decrease in strength is sufficiently suppressed even after the heat resistance test, and it becomes possible to have excellent heat resistance.
- the aluminum alloy conductive wire is disconnected when the aluminum alloy conductive wire is used in a portion susceptible to vibration in the automobile, routed, or stored in a bent state. Can be suppressed.
- the Mg content x in the aluminum alloy conductive wire is 1.45% by mass or less, and the Si content in the aluminum alloy conductive wire is 0.17% by mass or more and 0.0. It is 25 mass% or less, and it is preferable that only Ti among Ti, V, and B is contained in the aluminum alloy conductive wire.
- the heat resistance of the aluminum alloy conductive wire can be further improved.
- the present invention is an electric wire having the above aluminum alloy conductive wire.
- the aluminum alloy conductive wire can have excellent heat resistance, it is possible to have excellent heat resistance.
- this invention is a wire harness provided with two or more said electric wires.
- tensile strength refers to the tensile strength measured by a tensile test performed in accordance with JIS C3002.
- conductivity refers to conductivity obtained from electric resistance and mass measured according to JIS C3002.
- an aluminum alloy conductive wire having excellent heat resistance, an electric wire and a wire harness using the same are provided.
- FIG. 1 is a cross-sectional view showing an embodiment of the aluminum alloy conductive wire of the present invention.
- the aluminum alloy conductive wire 10 shown in FIG. 1 includes Si (silicon) in a range of 0.15% by mass to 0.25% by mass, Fe (iron) in a range of 0.6% by mass to 0.9% by mass, and Cu (copper).
- the tensile strength is T 1 MPa or less represented by the following formula (1)
- the conductivity is C% IACS or higher represented by the following formula (2).
- the content rate of Si, Fe, Cu, and Mg and the total content rate of Ti, V, and B are based on the mass of the aluminum alloy conductive wire 10 (100 mass%).
- T 1 59.5 ln (x) +231 (1)
- C 1.26x 2 -11.6x + 63.4 (2)
- the aluminum alloy conductive wire 10 contains Si in a range from 0.15% by mass to 0.25% by mass.
- the reason why the Si content is 0.15 mass% or more and 0.25 mass% or less is that the aluminum alloy conductive wire 10 has a higher tensile strength and elongation than when the Si content is less than 0.15 mass%. This is because the aluminum alloy conductive wire 10 is superior in conductivity as compared with the case where the Si content is more than 0.25 mass%.
- the Si content is preferably 0.16% by mass or more and 0.22% by mass or less.
- the aluminum alloy conductive wire 10 contains Fe in an amount of 0.6% by mass to 0.9% by mass.
- the reason why the Fe content is set to 0.6% by mass or more and 0.9% by mass is that the aluminum alloy conductive wire 10 has tensile strength and elongation as compared with the case where the Fe content is less than 0.6% by mass. This is because the aluminum alloy conductive wire 10 is superior in conductivity as compared with the case where the Fe content is more than 0.9 mass%.
- the content of Fe is preferably 0.68% by mass or more and 0.82% by mass or less.
- the aluminum alloy conductive wire 10 contains 0.05 mass% or more and 0.15 mass% or less of Cu.
- the reason why the Cu content is 0.05% by mass or more and 0.15% by mass or less is that the aluminum alloy conductive wire 10 has a higher tensile strength and elongation than the case where the Cu content is less than 0.05% by mass. This is because the aluminum alloy conductive wire 10 is excellent in conductivity as compared with the case where the Cu content is more than 0.15% by mass.
- the Cu content is preferably 0.06% by mass or more and 0.12% by mass or less.
- the aluminum alloy conductive wire 10 contains 0.2 mass% or more and 2.7 mass% or less of Mg.
- the reason why the Mg content is not less than 0.2% by mass and not more than 2.7% by mass is that the aluminum alloy conductive wire 10 has a higher tensile strength and elongation than the case where the Mg content is less than 0.2% by mass. This is because the aluminum alloy conductive wire 10 is more excellent in conductivity than the case where the Mg content is more than 2.7% by mass.
- the Mg content is preferably 0.2% by mass or more and 2.0% by mass or less.
- the total content of Ti, V and B is 0.03% by mass or less.
- the reason why the total content of Ti, V, and B is 0.03% by mass or less is that the aluminum alloy conductive wire 10 is smaller than the case where the total content of Ti, V, and B is greater than 0.03% by mass. It is because it is more excellent in electroconductivity.
- the total content of Ti, V and B is preferably 0.01% by mass or less.
- the total content rate of Ti, V, and B should just be 0.03 mass% or less, and may be 0 mass%. That is, the content of Ti, V, and B may all be 0% by mass.
- only Ti content in Ti, V and B may be 0% by mass, only V content may be 0% by mass, and only B content is 0% by mass. Also good.
- the Mg content x in the aluminum alloy conductive wire 10 is 1.45% by mass or less, and the Si content in the aluminum alloy conductive wire 10 is 0.17% by mass or more. It is 25 mass% or less, and it is preferable that only Ti among Ti, V, and B is contained in the aluminum alloy conductive wire 10.
- the aluminum alloy conductive wire 10 has the same composition, that is, when the content of Si, Fe, Cu, Mg and Ti in the aluminum alloy conductive wire 10 is the same, the heat resistance of the aluminum alloy conductive wire 10 is increased.
- the sex can be further improved.
- the Mg content in the aluminum alloy conductive wire 10 is preferably 0.3% by mass or more.
- the heat resistance can be further improved as compared with the case where the Mg content in the aluminum alloy conductive wire 10 is less than 0.3% by mass.
- the Si content in the aluminum alloy conductive wire 10 is preferably 0.23% by mass or less. In this case, the heat resistance can be further improved as compared with the case where the Si content in the aluminum alloy conductive wire 10 exceeds 0.23 mass%.
- the tensile strength in the aluminum alloy conductive wire 10 when the Mg content in the aluminum alloy conductive wire 10 is x mass%, the tensile strength is T 1 MPa or less represented by the above formula (1). . In this case, more excellent heat resistance can be obtained as compared with the case where the tensile strength of the aluminum alloy conductive wire 10 exceeds T 1 MPa represented by the above formula (1).
- the tensile strength may be T 2 MPa or more represented by the following formula (3).
- the aluminum alloy conductive wire 10 is more susceptible to vibration in the automobile than in the case where the tensile strength is less than T 2 MPa represented by the following formula (3).
- T 2 60.5 ln (x) +176 (3)
- the conductivity is C% IACS or more represented by the above formula (2).
- the conductivity of the aluminum alloy conductive wire 10 is preferably 65% IACS or less.
- the aluminum alloy conductive wire 10 has a Si content of 0.15 to 0.25 mass%, an Fe content of 0.6 to 0.9 mass%, and a Cu content of 0.05 to 0.15 mass%.
- the rough drawn wire can be obtained by a manufacturing method including a processing step of obtaining an aluminum alloy conductive wire 10 by performing processing steps including a heat treatment step and a wire drawing step.
- the rough drawn line forming step is a process of forming a rough drawn line composed of the above-described aluminum alloy.
- the rough drawing wire can be obtained, for example, by performing continuous casting and rolling, hot extrusion after billet casting, or the like on the molten metal made of the above-described aluminum alloy.
- a processing step is a step which obtains the aluminum alloy conductive wire 10 by performing the said process process with respect to a rough drawing wire.
- the treatment process is a process including a wire drawing process and a heat treatment process.
- the treatment process may include a wire drawing process and a heat treatment process.
- a wire drawing process As a concrete aspect of the procedure of a process process, the following aspects are mentioned, for example.
- the procedure of the processing step is not limited to the above embodiment.
- the wire drawing step may be further performed. In this case, it is necessary to perform a heat treatment step after the wire drawing step.
- the wire drawing process is a rough drawing wire, a wire drawing material obtained by drawing a rough drawing wire, or a wire drawing material obtained by further drawing a wire drawing material (hereinafter referred to as “rough drawing wire”, “drawing a rough drawing wire”).
- the diameter of the “drawn wire” and the “drawn wire obtained by further drawing the drawn wire” are called “wire”).
- the drawing process may be hot drawing or cold drawing, but is usually cold drawing.
- the diameter of the wire used as the object of a wire drawing process is large (for example, when it is 3 mm or more), in order to remove the distortion which generate
- the heat treatment step is a step of heat treating the wire.
- the heat treatment step performed after the wire drawing step is performed in order to remove strain generated in the wire in the wire drawing step.
- the tensile strength is T 1 MPa or less represented by the above formula (1)
- the conductivity is C% IACS or more represented by the above formula (2).
- the heat treatment temperature in the heat treatment step is usually 200 to 400 ° C.
- the heat treatment time in the heat treatment step is usually 1 to 24 hours.
- the wire is preferably heat treated at 350 ° C. or lower.
- the conductivity of the aluminum alloy conductive wire 10 can be increased.
- the heat treatment temperature of the wire in the final heat treatment step is preferably 200 ° C. or higher because the strength is sufficiently reduced.
- the heat treatment time in the final heat treatment step is preferably 1 hour or longer. In this case, a more uniform wire can be obtained over the entire length as compared with the case where the heat treatment is performed for less than 1 hour. However, the heat treatment time is preferably 12 hours or less.
- FIG. 2 is a cross-sectional view showing an embodiment of the electric wire of the present invention.
- the electric wire 20 has the aluminum alloy conductive wire 10 described above.
- the aluminum alloy conductive wire 10 can have excellent heat resistance, it is possible to have excellent heat resistance.
- the electric wire 20 usually further includes a coating layer 11 that covers the aluminum alloy conductive wire 10.
- the coating layer 11 is composed of, for example, a polyvinyl chloride resin or a flame retardant resin composition obtained by adding a flame retardant or the like to a polyolefin resin.
- FIG. 3 is a cross-sectional view showing an embodiment of the wire harness of the present invention.
- the wire harness 30 includes a plurality of the electric wires 20.
- the wire harness 30 can have excellent heat resistance because the electric wire 20 can have excellent heat resistance.
- Examples 1 to 20 and Comparative Examples 1 to 20 Si, Fe, Cu, Mg, Ti, V, and B were dissolved together with aluminum so as to have the contents shown in Tables 1 and 2, and poured into a 25 mm diameter mold to cast an aluminum alloy having a wire diameter of 25 mm.
- the aluminum alloy thus obtained was swaged to a wire diameter of 9.5 mm with a swaging machine (manufactured by Yoshida Memorial Co., Ltd.), and then heat treated at 270 ° C. for 8 hours to obtain a wire diameter of 9.5 mm.
- the rough draw line was obtained.
- the rough drawn wire thus obtained was processed using the following processing method to obtain an aluminum alloy conductive wire.
- Residual rate (%) 100 ⁇ tensile strength after heat test / tensile strength before heat test
- Aluminum alloy conductive wires having a residual rate of 95% or more were accepted as having excellent heat resistance, and indicated as “ ⁇ ”.
- aluminum alloy conductive wires with a residual rate of less than 95% were rejected as being inferior in heat resistance, and were indicated as “x” in Tables 1 and 2.
- the aluminum alloy conductive wire of the present invention has excellent heat resistance.
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Abstract
Description
T1=59.5ln(x)+231・・・(1)
C=1.26x2-11.6x+63.4・・・(2)
T2=60.5ln(x)+176・・・(3)
図1に示すアルミニウム合金導電線10は、Si(珪素)を0.15質量%以上0.25質量%以下、Fe(鉄)を0.6質量%以上0.9質量%以下、Cu(銅)を0.05質量%以上0.15質量%以下、Mg(マグネシウム)を0.2質量%以上2.7質量%以下、Ti(チタン)、V(バナジウム)及びB(ホウ素)を合計で0.03質量%以下含有し、アルミニウム合金導電線10中のMgの含有率がx質量%である場合に、引張強さが、下記式(1)で表されるT1MPa以下であり、導電率が、下記式(2)で表されるC%IACS以上である。ここで、Si、Fe、Cu及びMgの含有率、並びにTi、V及びBの合計含有率は、アルミニウム合金導電線10の質量を基準(100質量%)としたものである。
T1=59.5ln(x)+231・・・(1)
C=1.26x2-11.6x+63.4・・・(2)
T2=60.5ln(x)+176・・・(3)
荒引線形成ステップは、上述したアルミニウム合金で構成される荒引線を形成する工程である。
処理ステップは、荒引線に対し、上記処理工程を行うことによりアルミニウム合金導電線10を得るステップである。
処理工程は、伸線工程及び熱処理工程を含む工程である。
・熱処理工程→伸線工程→熱処理工程
・熱処理工程→伸線工程→熱処理工程→伸線工程→熱処理工程
・熱処理工程→伸線工程→熱処理工程→伸線工程→熱処理工程→伸線工程→熱処理工程
伸線工程→熱処理工程
・伸線工程→熱処理工程→伸線工程→熱処理工程
・伸線工程→熱処理工程→伸線工程→熱処理工程→伸線工程→熱処理工程
次に、本発明の電線について図2を参照しながら説明する。図2は、本発明の電線の一実施形態を示す断面図である。
次に、本発明のワイヤハーネスについて図3を参照しながら説明する。図3は、本発明のワイヤハーネスの一実施形態を示す断面図である。
Si、Fe、Cu、Mg、Ti、V及びBを表1及び2に示す含有率となるようにアルミニウムとともに溶解し、直径25mmの鋳型に流し込むことで線径25mmのアルミニウム合金を鋳造した。こうして得られたアルミニウム合金について、スウェージングマシン(吉田記念社製)によって線径9.5mmとなるようにスウェージング加工を行った後、270℃、8時間で熱処理することで線径9.5mmの荒引線を得た。こうして得られた荒引線を、下記の処理方法を用いて処理することによりアルミニウム合金導電線を得た。
(処理方法)
線径3.1mmまで伸線→270℃×8時間の熱処理→線径1.25mmまで伸線→270℃×8時間の熱処理→線径0.33mmまで伸線→表1及び2に示す最終熱処理の温度及び時間で熱処理
T1=59.5ln(x)+231・・・(1)
T2=60.5ln(x)+176・・・(3)
(上記式(1)および式(3)において、xはアルミニウム合金導電線中のMgの含有率(質量%)を表す)
C=1.26x2-11.6x+63.4・・・(2)
(上記式(2)において、xはアルミニウム合金導電線中のMgの含有率(質量%)を表す)
上記のようにして得られた実施例1~20及び比較例1~20のアルミニウム合金導電線について耐熱試験を行った。耐熱試験は、上記アルミニウム合金導電線を150℃で1000時間保持することによって行った。そして、耐熱試験後のアルミニウム合金導電線について、JIS C3002に準拠した引張試験を行い、引張強さを測定した。そして、耐熱試験前後の引張強さ及び、下記式に基づいて、耐熱試験前の引張強さに対する耐熱試験後の引張強さの残率を算出した。結果を表1及び2に示す。
残率(%)=100×耐熱試験後の引張強さ/耐熱試験前の引張強さ
なお、表1及び2において、残率が95%以上であるアルミニウム合金導電線については優れた耐熱性を有するものとして合格とし、「○」と表記した。また残率が95%未満であるアルミニウム合金導電線については耐熱性に劣るとして不合格とし、表1及び2において「×」と表記した。
20…電線
30…ワイヤハーネス
Claims (5)
- Siを0.15質量%以上0.25質量%以下、Feを0.6質量%以上0.9質量%以下、Cuを0.05質量%以上0.15質量%以下、Mgを0.2質量%以上2.7質量%以下、Ti、V及びBを合計で0.03質量%以下含有するアルミニウム合金導電線であって、
前記アルミニウム合金導電線中のMgの含有率がx質量%である場合に、引張強さが、下記式(1)で表されるT1MPa以下であり、導電率が、下記式(2)で表されるC%IACS以上である、アルミニウム合金導電線。
T1=59.5ln(x)+231・・・(1)
C=1.26x2-11.6x+63.4・・・(2) - 前記アルミニウム合金導電線中のMgの含有率がx質量%である場合に、引張強さが、下記式(3)で表されるT2MPa以上である、請求項1に記載のアルミニウム合金導電線。
T2=60.5ln(x)+176・・・(3) - 前記アルミニウム合金導電線中のMgの含有率xが1.45質量%以下であり、
前記アルミニウム合金導電線中のSiの含有率が0.17質量%以上0.25質量%以下であり、
前記アルミニウム合金導電線中にTi、V及びBのうちTiのみが含まれる、請求項1又は2に記載のアルミニウム合金導電線。 - 請求項1~3のいずれか一項に記載のアルミニウム合金導電線を有する電線。
- 請求項4に記載の電線を複数本備えるワイヤハーネス。
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