JP6629016B2 - Aluminum alloy conductive wire, electric wire, wire harness using the same, and method of manufacturing aluminum alloy conductive wire - Google Patents
Aluminum alloy conductive wire, electric wire, wire harness using the same, and method of manufacturing aluminum alloy conductive wire Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims description 68
- 238000004519 manufacturing process Methods 0.000 title description 9
- 238000010438 heat treatment Methods 0.000 claims description 76
- 238000005491 wire drawing Methods 0.000 claims description 33
- 238000012545 processing Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000010949 copper Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 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
- 230000035939 shock Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Conductive Materials (AREA)
- Non-Insulated Conductors (AREA)
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Description
本発明は、アルミニウム合金導電線、これを用いた電線、ワイヤハーネス及びアルミニウム合金導電線の製造方法に関する。 The present invention relates to an aluminum alloy conductive wire, an electric wire, a wire harness using the same, and a method for manufacturing an aluminum alloy conductive wire.
近年、自動車のドアのように開閉を行う部分や自動車のエンジン回りなどで用いられるワイヤハーネスの電線には、軽量化の観点から、導電線として銅線の代わりにアルミニウム合金導電線が用いられるようになってきている。 In recent years, for the wires of wire harnesses used for parts that open and close like automobile doors and around automobile engines, aluminum alloy conductive wires are used instead of copper wires as conductive wires from the viewpoint of weight reduction. It is becoming.
例えば下記特許文献１には、Ｓｉ：０．２〜０．８質量％、Ｆｅ：０．３６〜１．５質量％、Ｍｇ：０．４５〜０．９質量％、Ｔｉ：０．００５〜０．０３質量％を含み、残部がＡｌ及び不可避的不純物からなるＡｌ合金で形成されたアルミニウム合金導電線が開示されている。 For example, in Patent Document 1 below, Si: 0.2 to 0.8% by mass, Fe: 0.36 to 1.5% by mass, Mg: 0.45 to 0.9% by mass, Ti: 0.005 to There is disclosed an aluminum alloy conductive wire containing 0.03% by mass and the balance being made of an Al alloy composed of Al and unavoidable impurities.
しかし、上記特許文献１に記載されているアルミニウム合金導電線は、耐衝撃性には優れるものの、耐久性の点では未だ改善の余地を有していた。すなわち、上記特許文献１に記載されているアルミニウム合金導電線は、優れた耐衝撃性及び耐久性を両立させる点では未だ改善の余地を有していた。 However, although the aluminum alloy conductive wire described in Patent Document 1 has excellent impact resistance, there is still room for improvement in durability. That is, the aluminum alloy conductive wire described in Patent Document 1 has room for improvement in terms of achieving both excellent impact resistance and durability.
本発明は上記事情に鑑みてなされたものであり、優れた耐衝撃性及び耐久性を両立させることができるアルミニウム合金導電線、これを用いた電線、ワイヤハーネス及びアルミニウム合金導電線の製造方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an aluminum alloy conductive wire capable of achieving both excellent impact resistance and durability, an electric wire, a wire harness, and a method for manufacturing an aluminum alloy conductive wire using the same. The purpose is to provide.
本発明者は、上記課題を解決するため鋭意検討を行った。その結果、本発明者は、以下の発明により上記課題を解決し得ることを見出した。 The present inventor has conducted intensive studies in order to solve the above problems. As a result, the present inventor has found that the above problem can be solved by the following invention.
すなわち、本発明は、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０．３質量％以上０．５５質量％以下、Ｔｉを０質量％より多く、Ｖを０質量％より多く含有し、残部がアルミニウム及び不可避的不純物からなるアルミニウム合金導電線であって、Ｔｉ及びＶを合計で０．０１５質量％以下含有し、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線である。 That is, in the present invention, Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, and Cu is 0.05% by mass or more and 0.15% by mass or less. An aluminum alloy conductive wire containing 0.3% by mass or more and 0.55% by mass or less of Mg, more than 0% by mass of Ti, and more than 0% by mass of V, with the balance being aluminum and unavoidable impurities. , Ti and V are aluminum alloy conductive wires containing 0.015% by mass or less in total and having a tensile strength of 220 MPa or more and an elongation of 2% or more.
本発明のアルミニウム合金導電線によれば、優れた耐衝撃性及び耐久性を両立させることができる。 According to the aluminum alloy conductive wire of the present invention, both excellent impact resistance and durability can be achieved.
また本発明は、上述したアルミニウム合金導電線と、前記アルミニウム合金導電線を被覆する被覆層とを備える電線である。 The present invention is also an electric wire including the above-described aluminum alloy conductive wire and a coating layer that covers the aluminum alloy conductive wire.
本発明の電線によれば、上記アルミニウム合金導電線が優れた耐衝撃性及び耐久性を両立させることができるため、本発明の電線も、優れた耐衝撃性及び耐久性を両立させることができる。 According to the electric wire of the present invention, since the aluminum alloy conductive wire can achieve both excellent impact resistance and durability, the electric wire of the present invention can also achieve excellent impact resistance and durability. .
更に本発明は、上記電線を複数備えるワイヤハーネスである。 Further, the present invention is a wire harness including a plurality of the electric wires.
本発明のワイヤハーネスによれば、上記電線が優れた耐衝撃性及び耐久性を両立させることができるため、本発明のワイヤハーネスも、優れた耐衝撃性及び耐久性を両立させることができる。 According to the wire harness of the present invention, since the electric wire can achieve both excellent impact resistance and durability, the wire harness of the present invention can also achieve excellent impact resistance and durability.
また本発明は、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０．３質量％以上０．５５質量％以下、Ｔｉを０質量％より多く、Ｖを０質量％より多く含有し、残部がアルミニウム及び不可避的不純物からなり、Ｔｉ及びＶを合計で０．０１５質量％以下含有するアルミニウム合金で構成される荒引線を形成する荒引線形成ステップと、前記荒引線に対し、下記処理工程Ａを行うことにより、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線を得る処理ステップとを含む、アルミニウム合金導電線の製造方法である。
（処理工程Ａ）伸線工程及び熱処理工程を含み、前記熱処理工程のうち、いずれかの前記伸線工程の直前に行う熱処理工程において溶体化処理を行う処理工程であって、前記熱処理工程のうち、前記処理工程の最後に行われる前記熱処理工程を、１２０℃以上２００℃以下の熱処理温度で且つ３時間以上１８時間以下の熱処理時間で行う処理工程
In the present invention, the content of Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, Cu is 0.05% by mass or more and 0.15% by mass or less, It contains 0.3% by mass or more and 0.55% by mass or less of Mg, more than 0% by mass of Ti, and more than 0% by mass of V, and the balance consists of aluminum and unavoidable impurities. A rough drawing line forming step of forming a rough drawing line composed of an aluminum alloy containing not more than .015 mass%, and a treatment step A described below for the rough drawing line, thereby obtaining a tensile strength of 220 MPa or more and an elongation of 2% or more. And a processing step of obtaining an aluminum alloy conductive wire having the following.
(Processing step A) A processing step including a wire drawing step and a heat treatment step, in which a solution treatment is performed in a heat treatment step performed immediately before any of the wire drawing steps in the heat treatment step. A heat treatment step performed at the end of the treatment step at a heat treatment temperature of 120 ° C. or more and 200 ° C. or less and a heat treatment time of 3 hours or more and 18 hours or less.
この製造方法によれば、優れた耐衝撃性及び耐久性を両立させることができるアルミニウム合金導電線を製造することが可能となる。 According to this manufacturing method, it is possible to manufacture an aluminum alloy conductive wire that can achieve both excellent impact resistance and durability.
本発明によれば、優れた耐衝撃性及び耐久性を両立させることができるアルミニウム合金導電線、これを用いた電線、ワイヤハーネス及びアルミニウム合金導電線の製造方法が提供される。 ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the aluminum alloy conductive wire which can make it compatible with excellent impact resistance and durability, the electric wire using the same, a wire harness, and an aluminum alloy conductive wire is provided.
以下、本発明の実施形態について説明する。 Hereinafter, embodiments of the present invention will be described.
＜アルミニウム合金導電線＞
本発明のアルミニウム合金導電線は、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０．３質量％以上０．５５質量％以下、Ｔｉを０質量％より多く、Ｖを０質量％より多く含有し、残部がアルミニウム及び不可避的不純物からなる。さらに本発明のアルミニウム合金導電線は、Ｔｉ及びＶを合計で０．０１５質量％以下含有し、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有する。ここで、Ｓｉ、Ｆｅ、Ｃｕ、Ｍｇ、Ｔｉ、Ｖの含有率は、アルミニウム合金の重量を基準（１００質量％）としたものである。
<Aluminum alloy conductive wire>
In the aluminum alloy conductive wire of the present invention, Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, and Cu is 0.05% by mass or more and 0.15% by mass. It contains 0.3% by mass or less, 0.5% by mass or less of Mg, 0.5% by mass or less of Ti, more than 0% by mass of Ti, and more than 0% by mass of V, and the balance consists of aluminum and inevitable impurities. Furthermore, the aluminum alloy conductive wire of the present invention contains Ti and V in a total amount of 0.015% by mass or less, and has a tensile strength of 220 MPa or more and an elongation of 2% or more. Here, the contents of Si, Fe, Cu, Mg, Ti, and V are based on the weight of the aluminum alloy (100% by mass).
本発明のアルミニウム合金導電線によれば、優れた耐衝撃性及び耐久性を両立させることができる。 According to the aluminum alloy conductive wire of the present invention, both excellent impact resistance and durability can be achieved.
以下、本発明のアルミニウム合金導電線についてより詳細に説明する。 Hereinafter, the aluminum alloy conductive wire of the present invention will be described in more detail.
本発明のアルミニウム合金導電線において、Ｓｉの含有率を０．１５質量％以上０．２５質量％以下とするのは、Ｓｉの含有率が０．１５質量％未満である場合、優れた耐衝撃性及び耐久性を両立させることができず、Ｓｉの含有率が０．２５質量％より多いと、導電率が低下するからである。Ｓｉの含有率は好ましくは０．１８質量％以上０．２２質量％以下である。 In the aluminum alloy conductive wire of the present invention, the content of Si is set to 0.15% by mass or more and 0.25% by mass or less when the content of Si is less than 0.15% by mass. This is because it is not possible to achieve both compatibility and durability, and if the Si content is more than 0.25% by mass, the electrical conductivity is reduced. The Si content is preferably 0.18% by mass or more and 0.22% by mass or less.
本発明のアルミニウム合金導電線において、Ｆｅの含有率を０．６質量％以上０．９質量％以下とするのは、Ｆｅの含有率が０．６質量％未満である場合、優れた耐衝撃性及び耐久性を両立させることができず、Ｆｅの含有率が０．９質量％より多いと、導電率が低下するからである。Ｆｅの含有率は好ましくは０．７質量％以上０．８質量％以下である。 In the aluminum alloy conductive wire of the present invention, the content of Fe is set to 0.6% by mass or more and 0.9% by mass or less when the content of Fe is less than 0.6% by mass. This is because it is not possible to achieve both compatibility and durability, and if the Fe content is more than 0.9% by mass, the electrical conductivity is reduced. The Fe content is preferably 0.7% by mass or more and 0.8% by mass or less.
本発明のアルミニウム合金導電線において、Ｃｕの含有率を０．０５質量％以上０．１５質量％以下とするのは、Ｃｕの含有率が０．０５質量％未満である場合、優れた耐衝撃性及び耐久性を両立させることができず、Ｃｕの含有率が０．１５質量％より多いと、導電率が低下するからである。Ｃｕの含有率は好ましくは０．０６質量％以上０．１２質量％以下である。 In the aluminum alloy conductive wire of the present invention, the Cu content is set to be 0.05% by mass or more and 0.15% by mass or less when the Cu content is less than 0.05% by mass. This is because the properties and durability cannot be compatible, and if the content of Cu is more than 0.15% by mass, the electrical conductivity decreases. The Cu content is preferably 0.06% by mass or more and 0.12% by mass or less.
本発明のアルミニウム合金導電線において、Ｍｇの含有率を０．３質量％以上０．５５質量％以下とするのは、Ｍｇの含有率が０．３質量％未満である場合、優れた耐衝撃性及び耐久性を両立させることができず、Ｍｇの含有率が０．５５質量％より多いと、導電率が低下するからである。Ｍｇの含有率は好ましくは０．４質量％以上０．５質量％以下である。 In the aluminum alloy conductive wire of the present invention, the content of Mg is set to 0.3% by mass or more and 0.55% by mass or less when the Mg content is less than 0.3% by mass. This is because it is not possible to achieve both compatibility and durability, and if the content of Mg is more than 0.55% by mass, the electrical conductivity decreases. The Mg content is preferably 0.4% by mass or more and 0.5% by mass or less.
本発明のアルミニウム合金導電線がＴｉを０質量％より多く含有するのは、Ｔｉの含有率が０質量％である場合、優れた耐衝撃性及び耐久性を両立させることができないからである。 The reason why the aluminum alloy conductive wire of the present invention contains more than 0% by mass of Ti is that when the content of Ti is 0% by mass, it is not possible to achieve both excellent impact resistance and durability.
本発明のアルミニウム合金導電線がＶを０質量％より多く含有するのは、Ｖの含有率が０質量％である場合、優れた耐衝撃性及び耐久性を両立させることができないからである。 The reason that the aluminum alloy conductive wire of the present invention contains V in an amount of more than 0% by mass is that when the V content is 0% by mass, both excellent impact resistance and durability cannot be achieved.
本発明のアルミニウム合金導電線がＴｉ及びＶを合計で０．０１５質量％以下含有するのは、Ｔｉ及びＶを合計で０．０１５質量％より多く含有すると、導電率が低下するである。Ｔｉお及びＶの合計含有率は好ましくは０．００３質量％以上０．０１２質量％以下である。 The reason that the aluminum alloy conductive wire of the present invention contains Ti and V in a total amount of 0.015% by mass or less is that when the total content of Ti and V is more than 0.015% by mass, the electrical conductivity is reduced. The total content of Ti and V is preferably 0.003% by mass or more and 0.012% by mass or less.
本発明のアルミニウム合金導電線が、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するのは、引張強度が２２０ＭＰａ未満であるか、伸びが２％未満であると、優れた耐衝撃性及び耐久性を両立させることができなくなるからである。 The aluminum alloy conductive wire of the present invention has a tensile strength of 220 MPa or more and an elongation of 2% or more, because the tensile strength is less than 220 MPa or when the elongation is less than 2%, excellent impact resistance and durability. This is because it is not possible to balance the properties.
引張強度は２２０ＭＰａ以上であることが好ましく、２４０ＭＰａ以上であることがより好ましい。但し、アルミニウム合金導電線の柔軟性を確保するという理由から、引張強度は３２０ＭＰａ以下であることが好ましい。 The tensile strength is preferably at least 220 MPa, more preferably at least 240 MPa. However, from the viewpoint of securing the flexibility of the aluminum alloy conductive wire, the tensile strength is preferably 320 MPa or less.
伸びは２％以上であることが好ましく、２．４％以上であることがより好ましい。但し、伸びは３０％以下であることが好ましい。 The elongation is preferably at least 2%, more preferably at least 2.4%. However, the elongation is preferably 30% or less.
次に、本発明のアルミニウム合金導電線の製造方法について説明する。 Next, a method for manufacturing the aluminum alloy conductive wire of the present invention will be described.
本発明のアルミニウム合金導電線の製造方法は、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０．３質量％以上０．５５質量％以下、Ｔｉを０質量％より多く、Ｖを０質量％より多く含有し、残部がアルミニウム及び不可避的不純物からなり、Ｔｉ及びＶを合計で０．０１５質量％以下含有するアルミニウム合金で構成される荒引線を形成する荒引線形成ステップと、この荒引線に対して、下記処理工程Ａを行うことにより、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線を得る処理ステップとを含む。
（処理工程Ａ）伸線工程及び熱処理工程を含み、熱処理工程のうち、いずれかの伸線工程の直前に行う熱処理工程において溶体化処理を行う処理工程
In the method for producing an aluminum alloy conductive wire according to the present invention, the content of Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, and Cu is 0.05% by mass or more. 0.15% by mass or less, Mg of 0.3% by mass or more and 0.55% by mass or less, containing more than 0% by mass of Ti and more than 0% by mass of V, and the balance consists of aluminum and inevitable impurities, A rough drawing line forming step of forming a rough drawing line composed of an aluminum alloy containing a total of 0.015% by mass or less of Ti and V, and a processing step A described below are performed on the rough drawing line to obtain 220 MPa or more. Obtaining an aluminum alloy conductive wire having a tensile strength and an elongation of 2% or more.
(Processing step A) A processing step including a wire drawing step and a heat treatment step, wherein a solution treatment is performed in a heat treatment step performed immediately before any of the wire drawing steps in the heat treatment step.
次に、上述した荒引線形成ステップ及び処理ステップについて詳細に説明する。 Next, the above-described rough drawing line forming step and processing step will be described in detail.
＜荒引線形成ステップ＞
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。
<Rough wire drawing step>
The rough wire forming step is a process of forming a rough wire made of the above-described aluminum alloy.
上記荒引線は、例えば上述したアルミニウム合金からなる溶湯に対し、連続鋳造圧延やビレット鋳造後の熱間押出し等を行うことにより得ることができる。 The rough drawn wire can be obtained, for example, by performing continuous casting rolling, hot extrusion after billet casting, or the like on a molten metal made of the above-described aluminum alloy.
＜処理ステップ＞
処理ステップは、荒引線に対し、上記処理工程Ａを行うことにより、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線を得るステップである。
<Processing step>
The processing step is a step of obtaining an aluminum alloy conductive wire having a tensile strength of 220 MPa or more and an elongation of 2% or more by performing the above-described processing step A on the rough drawn wire.
（処理工程Ａ）
上記処理工程Ａは、伸線工程及び熱処理工程を含み、熱処理工程のうち、いずれかの伸線工程の直前に行う熱処理工程において溶体化処理を行う工程である。
(Processing step A)
The processing step A includes a wire drawing step and a heat treatment step, and is a step of performing a solution treatment in a heat treatment step performed immediately before any of the wire drawing steps.
処理工程Ａの具体的な態様としては、例えば以下のものが挙げられる。
（１）熱処理工程（溶体化処理工程）→伸線工程→熱処理工程
（２）熱処理工程→伸線工程→熱処理工程（溶体化処理工程）→伸線工程→熱処理工程
（３）熱処理工程（溶体化処理工程）→伸線工程→熱処理工程→伸線工程→熱処理工程
（４）熱処理工程→伸線工程→熱処理工程→伸線工程→熱処理工程（溶体化処理工程）→伸線工程→熱処理工程
（５）熱処理工程→伸線工程→熱処理工程（溶体化処理工程）→伸線工程→熱処理工程→伸線工程→熱処理工程
（６）熱処理工程（溶体化処理工程）→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
Specific examples of the processing step A include, for example, the following.
(1) heat treatment step (solution treatment step) → wire drawing step → heat treatment step (2) heat treatment step → wire drawing step → heat treatment step (solution treatment step) → wire drawing step → heat treatment step (3) heat treatment step (solution Solution treatment step) → wire drawing step → heat treatment step → wire drawing step → heat treatment step (4) heat treatment step → wire drawing step → heat treatment step → wire drawing step → heat treatment step (solution treatment step) → wire drawing step → heat treatment step (5) Heat treatment step → wire drawing step → heat treatment step (solution treatment step) → wire drawing step → heat treatment step → wire drawing step → heat treatment step (6) heat treatment step (solution treatment step) → wire drawing step → heat treatment step → Wire drawing process → Heat treatment process → Wire drawing process → Heat treatment process
但し、処理工程Ａの手順は上記の態様に限定されるものではない。例えば上記の具体的な態様では伸線工程が１〜３回行われているが、伸線工程は４回以上行われてもよい。この場合、各伸線工程の後に熱処理を行うことが必要である。 However, the procedure of the processing step A is not limited to the above embodiment. For example, in the above specific embodiment, the drawing step is performed 1 to 3 times, but the drawing step may be performed 4 times or more. In this case, it is necessary to perform heat treatment after each drawing step.
伸線工程は、荒引線、荒引線を伸線して得られる伸線材、又は伸線材をさらに伸線して得られる伸線材など（以下、「線材」と呼ぶ）の径を低減させる工程である。伸線工程は、熱間伸線であっても冷間伸線であってもよいが、通常は冷間伸線である。 The wire drawing step is a step of reducing the diameter of a rough drawn wire, a drawn wire obtained by drawing a rough drawn wire, or a drawn wire obtained by further drawing a drawn wire (hereinafter, referred to as a “wire”). is there. The drawing step may be hot drawing or cold drawing, but is usually cold drawing.
溶体化処理は、線材を構成するアルミニウム合金中に溶け込んでいないＳｉ、Ｆｅ、Ｃｕ、Ｍｇ、Ｔｉ又はＶなどの添加元素をアルミニウム合金に溶け込ませ均質化させる熱処理を行った後、線材を液体に入れて急冷する処理である。線材を急冷するのは、自然冷却する場合と比べて、溶け込んだ添加元素が冷却中に析出することを抑制するためである。 The solution treatment is performed by dissolving an additive element such as Si, Fe, Cu, Mg, Ti or V which is not dissolved in the aluminum alloy constituting the wire into the aluminum alloy and performing a heat treatment for homogenization, and then converting the wire into a liquid. It is a process of putting and quenching. The reason for quenching the wire is to suppress the dissolved added element from being precipitated during cooling, as compared with the case of natural cooling.
溶体化処理における熱処理温度は、アルミニウム合金中に溶け込んでいない添加元素をアルミニウム合金中に溶け込ませることができる温度であれば特に制限されるものではないが、４５０℃以上であることが好ましい。この場合、熱処理温度が４５０℃未満である場合と比べて、添加元素がより十分に均質化する。但し、熱処理温度は５５０℃以下であることが好ましい。この場合、熱処理温度が５５０℃より高い場合と比べて、線材が部分的に溶解することをより十分に抑制できる。 The heat treatment temperature in the solution treatment is not particularly limited as long as the additional element not dissolved in the aluminum alloy can be dissolved in the aluminum alloy, but is preferably 450 ° C. or higher. In this case, the added element is more fully homogenized than when the heat treatment temperature is lower than 450 ° C. However, the heat treatment temperature is preferably 550 ° C. or lower. In this case, the partial dissolution of the wire can be more sufficiently suppressed as compared with the case where the heat treatment temperature is higher than 550 ° C.
溶体化処理における熱処理時間は、特に制限されるものではないが、アルミニウム合金中に溶け込んでいない添加元素をアルミニウム合金中に十分に溶け込ませる観点からは、２時間以上であることが好ましい。但し、熱処理時間は、２時間以上処理してもあまり効果が変わらないため、生産効率を向上させるという理由から、４時間以下であることが好ましい。 The heat treatment time in the solution treatment is not particularly limited, but is preferably 2 hours or more from the viewpoint of sufficiently dissolving the added element not dissolved in the aluminum alloy into the aluminum alloy. However, the heat treatment time is preferably not more than 4 hours from the viewpoint of improving the production efficiency since the effect is not so much changed even if the treatment is performed for 2 hours or more.
急冷のために用いる液体としては、水、液体窒素などを用いることができる。 As a liquid used for quenching, water, liquid nitrogen, or the like can be used.
熱処理工程は、線材を熱処理する工程である。特に、伸線工程の後に行われる熱処理工程は、伸線工程で線材中に発生した歪を除去するために行われるものである。 The heat treatment step is a step of heat treating the wire. In particular, the heat treatment step performed after the wire drawing step is performed to remove the strain generated in the wire rod in the wire drawing step.
熱処理工程における熱処理温度は特に制限されるものではないが、通常は１００〜３００℃であり、好ましくは２００〜３００℃である。 The heat treatment temperature in the heat treatment step is not particularly limited, but is usually 100 to 300 ° C, preferably 200 to 300 ° C.
また熱処理工程における熱処理時間は、熱処理温度にも依存するので一概には言えないが、通常は１〜２０時間であり、より好ましくは８〜１５時間である。 The heat treatment time in the heat treatment step cannot be unconditionally determined because it depends on the heat treatment temperature, but is usually 1 to 20 hours, more preferably 8 to 15 hours.
特に熱処理工程のうち最後に行われる熱処理工程（以下、「最終熱処理工程」と呼ぶ）では、線材を２００℃以下で熱処理することが好ましい。この場合、熱処理温度が２００℃を超える場合に比べて、高い引張強度及び伸びが得られる。但し、線材の熱処理温度は、溶体化させた元素を微細な結晶として析出させるという理由から、１２０℃以上であることが好ましい。 In particular, in the last heat treatment step of the heat treatment step (hereinafter, referred to as “final heat treatment step”), it is preferable to heat-treat the wire at 200 ° C. or lower. In this case, higher tensile strength and elongation can be obtained than when the heat treatment temperature exceeds 200 ° C. However, the heat treatment temperature of the wire is preferably 120 ° C. or higher because the solution-solution element is precipitated as fine crystals.
最終熱処理工程における熱処理時間は３時間以上であることが好ましい。この場合、伸線材の熱処理を３時間未満行う場合に比べて、伸び及び導電性がより向上する。但し、熱処理時間は１８時間以下であることが好ましい。 The heat treatment time in the final heat treatment step is preferably 3 hours or more. In this case, the elongation and the conductivity are further improved as compared with the case where the heat treatment of the drawn wire is performed for less than 3 hours. However, the heat treatment time is preferably 18 hours or less.
（電線）
本発明の電線は、上述したアルミニウム合金導電線とアルミ合金導電線を被覆する被覆層を備える。
(Electrical wire)
The electric wire of the present invention includes the above-described aluminum alloy conductive wire and a coating layer that covers the aluminum alloy conductive wire.
この電線によれば、アルミニウム合金導電線が、優れた耐衝撃性及び耐久性を両立させることができるため、優れた耐衝撃性及び耐久性を両立させることができる。 According to this electric wire, since the aluminum alloy conductive wire can achieve both excellent impact resistance and durability, it is possible to achieve both excellent impact resistance and durability.
本発明の電線に含まれる被覆層は、例えばポリ塩化ビニル樹脂や、ポリオレフィン樹脂に難燃剤等を添加してなる難燃性樹脂組成物などで構成される。 The coating layer included in the electric wire of the present invention is made 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.
（ワイヤハーネス）
本発明のワイヤハーネスは、上記電線を複数備えるものである。
(Wire harness)
The wire harness of the present invention includes a plurality of the electric wires.
このワイヤハーネスによれば、電線が優れた耐衝撃性及び耐久性を両立させることができるため、優れた耐衝撃性及び耐久性を両立させることができる。 According to this wire harness, since the electric wire can achieve both excellent impact resistance and durability, it is possible to achieve both excellent impact resistance and durability.
以下、本発明の内容を実施例及び比較例を挙げてより具体的に説明するが、本発明は、以下の実施例に限定されるものではない。 Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.
（実施例１〜８及び比較例１〜１１）
Ｓｉ、Ｆｅ、Ｃｕ、Ｍｇ、Ｔｉ及びＶを表１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、プロペルチ法によって連続鋳造圧延することによって線径９．５ｍｍの荒引線を得た。その後、下記の処理工程Ａ〜Ｃのいずれか一つの処理工程を行うことによりアルミニウム合金導電線を得た。
（処理工程Ａ）２７０℃×８時間で熱処理→線径３．２ｍｍまで伸線→２７０℃×８時間で熱処理→線径１．２５ｍｍまで伸線→熱処理（溶体化処理）→線径０．３３ｍｍまで伸線→表１に示す最終熱処理の温度及び時間で熱処理
（処理工程Ｂ）２７０℃×８時間で熱処理→線径３．２ｍｍまで伸線→２７０℃×８時間で熱処理→線径０．３３ｍｍまで伸線→表１に示す最終熱処理の温度及び時間で熱処理
（処理工程Ｃ）２７０℃×８時間で熱処理→線径３．２ｍｍまで伸線→２７０℃×８時間で熱処理→線径０．３３ｍｍまで伸線→熱処理（溶体化処理）→表１に示す最終熱処理の温度及び時間で熱処理
(Examples 1 to 8 and Comparative Examples 1 to 11)
Si, Fe, Cu, Mg, Ti and V were dissolved together with aluminum so as to have the contents shown in Table 1, and were subjected to continuous casting and rolling by the Properch method to obtain a rough drawn wire having a wire diameter of 9.5 mm. Thereafter, an aluminum alloy conductive wire was obtained by performing any one of the following processing steps A to C.
(Processing step A) Heat treatment at 270 ° C. × 8 hours → wire drawing to 3.2 mm → heat treatment at 270 ° C. × 8 hours → wire drawing to 1.25 mm → heat treatment (solution treatment) → wire diameter 0. Wire drawing up to 33 mm → Heat treatment at the temperature and time of the final heat treatment shown in Table 1 (Processing step B) Heat treatment at 270 ° C. × 8 hours → Wire drawing up to 3.2 mm wire → Heat treatment at 270 ° C. × 8 hours → Wire diameter 0 Wire drawing up to 0.33 mm → Heat treatment at the temperature and time of the final heat treatment shown in Table 1 (Processing step C) Heat treatment at 270 ° C × 8 hours → Wire drawing up to 3.2 mm wire → Heat treatment at 270 ° C × 8 hours → Wire diameter Wire drawing to 0.33mm → heat treatment (solution treatment) → heat treatment at final heat treatment temperature and time shown in Table 1.
なお、処理工程Ａ及び処理工程Ｃにおいて、溶体化処理は、５３０℃×３時間で伸線材の熱処理を行った後、伸線材を水中に浸漬し、伸線材を急冷することによって行った。
上記のようにして得られた実施例１〜８及び比較例１〜１１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による引張強さ及び伸びを測定した。結果を表１に示す。
In the treatment step A and the treatment step C, the solution treatment was performed by performing a heat treatment of the drawn wire at 530 ° C. for 3 hours, then immersing the drawn wire in water, and rapidly cooling the drawn wire.
The tensile strength and elongation of the aluminum alloy conductive wires of Examples 1 to 8 and Comparative Examples 1 to 11 obtained as described above were measured by a tensile test in accordance with JIS C3002. Table 1 shows the results.
［特性評価］
（耐衝撃性）
実施例１〜８及び比較例１〜１１の長さ１ｍのアルミニウム合金導電線に、８０ｇの錘を接続し、錘を５０ｃｍ持ち上げて落下させた際にアルミニウム合金導電線が断線するか否かによって耐衝撃性を評価した。結果を表１に示す。
[Characteristic evaluation]
(Shock resistance)
A weight of 80 g was connected to the aluminum alloy conductive wire having a length of 1 m in Examples 1 to 8 and Comparative Examples 1 to 11, depending on whether or not the aluminum alloy conductive wire was disconnected when the weight was lifted by 50 cm and dropped. The impact resistance was evaluated. Table 1 shows the results.
（耐久性）
実施例１〜８及び比較例１〜１１のアルミニウム合金導電線について、２ｋｇの錘をぶら下げた際に断線するか否かによって耐久性を評価した。結果を表１に示す。
(durability)
The durability of the aluminum alloy conductive wires of Examples 1 to 8 and Comparative Examples 1 to 11 was evaluated depending on whether or not the wire was broken when a 2 kg weight was hung. Table 1 shows the results.
（導電性）
実施例１〜８及び比較例１〜１１のアルミニウム合金導電線について、ＪＩＳ Ｃ３００２に準拠した導電率測定を行った。結果を表１に示す。
Conductivity measurement based on JIS C3002 was performed on the aluminum alloy conductive wires of Examples 1 to 8 and Comparative Examples 1 to 11. Table 1 shows the results.
表１に示す結果より、実施例１〜８のアルミニウム合金導電線は、優れた耐衝撃性及び耐久性を両立させることができるのに対し、比較例１〜１１のアルミニウム合金導電線は、優れた耐衝撃性及び耐久性を両立させることができないことが分かった。 From the results shown in Table 1, while the aluminum alloy conductive wires of Examples 1 to 8 can achieve both excellent impact resistance and durability, the aluminum alloy conductive wires of Comparative Examples 1 to 11 are excellent. It was found that it was impossible to achieve both impact resistance and durability.
以上より、本発明のアルミニウム合金導電線によれば、優れた耐衝撃性及び耐久性を両立させることができることが確認された。 As described above, it was confirmed that the aluminum alloy conductive wire of the present invention can achieve both excellent impact resistance and durability.
Claims (4)
Ｔｉ及びＶを合計で０．０１５質量％以下含有し、
２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線。 Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, Cu is 0.05% by mass or more and 0.15% by mass or less, and Mg is 0.3% by mass or less. An aluminum alloy conductive wire containing at least 0.5% by mass and not more than 0.55% by mass, more than 0% by mass of Ti, and more than 0% by mass of V, and the balance being aluminum and unavoidable impurities,
Containing a total of 0.015% by mass of Ti and V,
An aluminum alloy conductive wire having a tensile strength of 220 MPa or more and an elongation of 2% or more.
前記アルミニウム合金導電線を被覆する被覆層とを備える電線。 An aluminum alloy conductive wire according to claim 1,
And a coating layer for coating the aluminum alloy conductive wire.
前記荒引線に対し、下記処理工程Ａを行うことにより、２２０ＭＰａ以上の引張強度及び２％以上の伸びを有するアルミニウム合金導電線を得る処理ステップとを含む、アルミニウム合金導電線の製造方法。
（処理工程Ａ）伸線工程及び熱処理工程を含み、前記熱処理工程のうち、いずれかの前記伸線工程の直前に行う熱処理工程において溶体化処理を行う処理工程であって、前記熱処理工程のうち、前記処理工程の最後に行われる前記熱処理工程を、１２０℃以上２００℃以下の熱処理温度で且つ３時間以上１８時間以下の熱処理時間で行う処理工程
Si is 0.15% by mass or more and 0.25% by mass or less, Fe is 0.6% by mass or more and 0.9% by mass or less, Cu is 0.05% by mass or more and 0.15% by mass or less, and Mg is 0.3% by mass or less. Not less than 0.5% by mass, not more than 0% by mass, not less than 0% by mass and not more than 0% by mass of V, and the balance consists of aluminum and inevitable impurities, and not more than 0.015% by mass in total of Ti and V A rough wire forming step of forming a rough wire composed of an aluminum alloy containing
Performing a process A described below on the rough wire to obtain an aluminum alloy conductive wire having a tensile strength of 220 MPa or more and an elongation of 2% or more.
(Processing step A) A processing step including a wire drawing step and a heat treatment step, in which a solution treatment is performed in a heat treatment step performed immediately before any of the wire drawing steps in the heat treatment step. A heat treatment step performed at the end of the treatment step at a heat treatment temperature of 120 ° C. or more and 200 ° C. or less and a heat treatment time of 3 hours or more and 18 hours or less.
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| EP2381001B1 (en) * | 2009-01-19 | 2014-06-04 | Furukawa Electric Co., Ltd. | Aluminum alloy wire |
| JP5247584B2 (en) * | 2009-05-14 | 2013-07-24 | 株式会社フジクラ | Al alloy and Al alloy conductive wire |
| JP2010280969A (en) * | 2009-06-05 | 2010-12-16 | Fujikura Ltd | Copper-clad aluminum alloy wire |
| CN103052729B (en) * | 2010-07-20 | 2017-03-08 | 古河电气工业株式会社 | Aluminium alloy conductor and its manufacture method |
| CN104781433B (en) * | 2013-03-29 | 2017-07-07 | 古河电器工业株式会社 | The manufacture method of aluminium alloy conductor, aluminium alloy stranded conductor, coated electric wire, wire harness and aluminium alloy conductor |
| JP6240424B2 (en) * | 2013-07-18 | 2017-11-29 | 株式会社フジクラ | Method for producing Al alloy conductive wire |
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2015
- 2015-09-11 JP JP2015178992A patent/JP6629016B2/en active Active
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