JPH06316735A - Hanging overhead wire - Google Patents
Hanging overhead wireInfo
- Publication number
- JPH06316735A JPH06316735A JP12547193A JP12547193A JPH06316735A JP H06316735 A JPH06316735 A JP H06316735A JP 12547193 A JP12547193 A JP 12547193A JP 12547193 A JP12547193 A JP 12547193A JP H06316735 A JPH06316735 A JP H06316735A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- copper alloy
- overhead wire
- obtd
- 10ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Conductive Materials (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、高温クリープ特性に
優れた電気鉄道の吊架線に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension line for an electric railway having excellent high temperature creep characteristics.
【0002】[0002]
【従来の技術】電気鉄道における架線は、電気鉄道車に
電力を供給するトロリ線、供給電力の不足を補給しかつ
トロリ線を空中で支えるための吊架線およびき電線で構
成されている。2. Description of the Related Art An overhead line in an electric railway is composed of a trolley wire for supplying electric power to an electric railway vehicle, a suspension overhead wire and a feeder wire for replenishing the shortage of supplied power and supporting the trolley wire in the air.
【0003】吊架線は上述のようにトロリ線を空中で支
えかつトロリ線に不足電力を補供する必要から、高導電
性(75%IACS以上)および高強度(60kgf/mm2
以上)の特性が要求されている。従来の吊架線には硬銅
線の撚線が用いられていたが、近年、Cr:0.3〜
1.5%、Zr:0.1〜0.5%を含有し、残りが実
質的にCuからなる組成の銅合金線を撚った吊架線も提
案されている(特公昭63−3936号公報参照)。As described above, the suspended overhead wire is required to support the trolley wire in the air and to supplement the trolley wire with insufficient power, so that it has high conductivity (75% IACS or more) and high strength (60 kgf / mm 2).
The above characteristics are required. Conventionally, a stranded wire of a hard copper wire was used for a suspended overhead wire, but in recent years, Cr: 0.3-
A suspension wire formed by twisting a copper alloy wire having a composition of 1.5% and Zr: 0.1 to 0.5% and the rest substantially consisting of Cu has also been proposed (Japanese Patent Publication No. 63-3936). See the bulletin).
【0004】[0004]
【発明が解決しようとする課題】しかしながら、従来銅
トロリ線と硬銅線撚線の吊架線で構成されていた架線系
のうち、近年同じ断面積の鋼芯銅トロリ線が使用され、
トロリ線自体の電力供給能力が減少し、その不足分の電
力供給量を従来以上に(約60%増し)吊架線に負担さ
せる処置がとられるようになった。また近年電気鉄道車
の一列車当りの電力使用量が増大し、それら列車本数も
増加した。一方、電気鉄道車はますます高速化している
関係で、波動伝播速度の関係から、電気鉄道車が安定的
にトロリ線から集電出来るようにするため、架線径全体
の軽量化が要求されており、吊架線も例えば、直径4.
3mmの細線7本から直径3.7mmの細線7本といった細
径化されるようになった。従って吊架線には今まで以上
に電流が流れるため、その発熱量はますます増大した。
そこで吊架線材料には、この対策として引張り強さに優
れ、しかも200℃あるいは300℃までの耐熱クリー
ブ特性に優れた特性が要求された。吊架線は、端末を約
1000kgの重りを、垂直に懸垂し、その張力で張って
いるが、電気鉄道車が通過した場合など、この端末部に
繰り返し曲げ応力がかかり、これが何万回繰り返された
場合、この部分で破断するといったようなことが発生す
る。この部分に対して吊架線には90°繰り返し曲げ特
性に優れるといった特性も要求されている。However, in the overhead wire system which has conventionally been composed of a suspension wire made of a copper trolley wire and a hard copper wire stranded wire, a steel core copper trolley wire having the same cross-sectional area has recently been used.
The power supply capacity of the trolley wire itself has decreased, and measures have been taken to make the suspended power supply more deficient in power supply (up by about 60%) than before. In recent years, the electric power consumption per train of electric railway cars has increased, and the number of such trains has also increased. On the other hand, electric railway cars are becoming faster and faster, and due to the wave propagation speed, it is required to reduce the overall diameter of the overhead wire in order to enable the electric railway cars to stably collect current from the trolley wire. And the suspension overhead wire also has a diameter of, for example, 4.
The diameter has been reduced from 7 thin wires of 3 mm to 7 thin wires of 3.7 mm in diameter. As a result, more current flows through the suspended overhead wire, and the amount of heat generated by it increases.
Therefore, as a countermeasure against this, suspended wire materials are required to have excellent tensile strength and excellent heat-resistant cleave characteristics up to 200 ° C or 300 ° C. The suspended overhead wire has a terminal weight of about 1000 kg suspended vertically and is stretched by the tension. However, when an electric railway car passes, the terminal part is repeatedly subjected to bending stress, which is repeated tens of thousands of times. In this case, a breakage may occur at this portion. For this portion, the suspension overhead wire is also required to have a property of being excellent in 90 ° cyclic bending property.
【0005】[0005]
【課題を解決するための手段】そこで、本発明者等は、
かかる要求をみたすことのできる銅合金製吊架線を開発
すべく研究を行っていたところ、従来のCrおよびZr
を含有する銅合金に含まれる酸素を10ppm 以下にした
銅合金からなる吊架線は高温環境下において張られてい
ても破断することがなく、導電性にも優れているという
研究結果を得られたのである。Therefore, the present inventors have
While conducting research to develop a suspension wire made of copper alloy that can meet such requirements, conventional Cr and Zr
It has been obtained that the suspended wire made of a copper alloy in which oxygen contained in the copper alloy containing 10 ppm or less does not break even when stretched in a high temperature environment and has excellent conductivity. Of.
【0006】この発明は、かかる研究結果にもとづいて
なされたものであって、重量%で(以下、%は重量%を
示す)、Cr:0.15〜1%、Zr:0.01〜0.
3%、酸素:10ppm 以下を含有し、残りがCuおよび
不可避不純物からなる組成の銅合金線からなる吊架線に
特徴を有するものである。The present invention has been made on the basis of the results of such research, and in% by weight (hereinafter,% means% by weight), Cr: 0.15 to 1%, Zr: 0.01 to 0. .
3%, oxygen: 10 ppm or less is contained, and the remainder is characterized by a suspension wire made of a copper alloy wire having a composition of Cu and inevitable impurities.
【0007】この発明の吊架線を構成する銅合金線の成
分組成を上記の如く限定した理由は、Crが1%を越え
て含有されてもまたZrが0.3%を越えて含有されて
も熱間加工性が低下して線材に加工することが難しくな
り、一方、Crが0.15%未満であってもまたZrが
0.01%未満であっても所望の引張り強さが得られな
い。The reason why the composition of the copper alloy wire constituting the suspension wire of the present invention is limited as described above is that even if Cr is contained in excess of 1% and Zr is contained in excess of 0.3%. However, the hot workability is deteriorated, and it becomes difficult to process it into a wire. On the other hand, even if Cr is less than 0.15% or Zr is less than 0.01%, desired tensile strength can be obtained. I can't.
【0008】また、酸素は10ppm を越えて含有すると
200℃以上の高温クリープ強度が得られないところか
ら酸素含有量は10ppm 以下に定めた。If oxygen is contained in excess of 10 ppm, high temperature creep strength of 200 ° C. or higher cannot be obtained. Therefore, the oxygen content is set to 10 ppm or less.
【0009】[0009]
【実施例】原料として酸素含有量:20ppm の電気銅を
用意し、この電気銅を黒鉛るつぼに装入し、Arガス雰
囲気中にて溶解し、溶銅温度が1200℃になった時点
で約10l/分の流量のCOガスを黒鉛ノズルを通して
吹込み、10分間続けて吹込んだのち、上記黒鉛ノズル
を通してCu2 O粉末を1000g瞬間的に吹込み、さ
らに上記COガスを10分間続けて吹込むことによりO
2 :10ppm 以下の極低酸素銅溶湯を作製し、この溶湯
中にCrを添加し、さらにZrを添加攪拌し、ついで得
られた銅合金溶湯を金型に鋳込んで直径:250mm、長
さ:3mの寸法を有し、表1に示される成分組成の円柱
状銅合金鋳塊を得た。[Example] As a raw material, prepared was electrolytic copper having an oxygen content of 20 ppm. The electrolytic copper was charged into a graphite crucible and melted in an Ar gas atmosphere. After blowing CO gas at a flow rate of 10 l / min through the graphite nozzle for 10 minutes continuously, 1000 g of Cu 2 O powder was instantaneously blown through the graphite nozzle, and further the CO gas was continuously blown for 10 minutes. O by inserting
2 : An extremely low oxygen copper melt of 10 ppm or less was prepared, Cr was added to this melt, Zr was further added and stirred, and then the obtained copper alloy melt was cast into a mold to have a diameter of 250 mm and a length of 250 mm. A cylindrical copper alloy ingot having a component composition shown in Table 1 having a size of 3 m was obtained.
【0010】この円柱状銅合金鋳塊を熱間圧延すること
により直径:18mmの線材を製造し、コイル状に巻き取
ったのち950℃、30分間加熱し、これを水冷するこ
とにより溶体化処理を施し、冷間引抜きして直径:13
mmの線材とし、これをコイル状に巻き取った。This cylindrical copper alloy ingot is hot-rolled to produce a wire having a diameter of 18 mm, which is wound into a coil, heated at 950 ° C. for 30 minutes, and then water-cooled for solution treatment. And cold drawing, diameter: 13
mm wire rod, which was wound into a coil.
【0011】このコイル状に巻き取った線材を還元雰囲
気中、470℃、2時間保持の条件で析出時効処理を施
したのち、直径:4.3mmの線材になるように冷間引抜
き加工し、これをコイル状に巻き取ったのち、還元雰囲
気中、温度:460℃、2時間保持の条件で再び析出時
効処理し、上記直径:4.3mmの線材を7本をピッチ1
50mm、導体外径:12.95mmで撚線し、本発明吊架
線1〜5を製造した。一方、表1に示される成分組成の
従来吊架線も用意した。本発明吊架線1〜5および従来
吊架線について、常温での引張り強さ、0.2%耐力、
伸びおよび導電率を測定し、さらに、N2 ガス雰囲気
中、温度:200℃および300℃において、表2に示
される時間保持の条件で高温クリープラプチャー試験を
行ない、破断に至るまでの時間を測定し、その結果を表
2に示した。さらに、本発明吊架線1〜5および従来吊
架線について、繰り返し曲げ試験を行ない、破断するま
での曲げ回数を測定し、その結果も表2に示した。な
お、上記繰り返し曲げ試験は、曲げの内側半径を線径の
2.5倍とし、曲げ方向は垂直の位置から90°曲げた
のち元の位置にもどし、これを1回とし、つぎに反対方
向へ90°曲げたのち、元の位置にもどし、これを2回
とし、これを繰り返すことにより行った。This coiled wire rod was subjected to precipitation aging treatment in a reducing atmosphere at 470 ° C. for 2 hours, and then cold drawn into a wire rod having a diameter of 4.3 mm. After winding it into a coil, it was again subjected to precipitation aging treatment in a reducing atmosphere at a temperature of 460 ° C. for 2 hours, and the above wire rod having a diameter of 4.3 mm was pitched with 7 wires.
Stranded wires having a diameter of 50 mm and a conductor outer diameter of 12.95 mm were used to produce suspension wires 1 to 5 of the present invention. On the other hand, a conventional suspension overhead wire having the component composition shown in Table 1 was also prepared. For the suspension wires 1 to 5 of the present invention and the conventional suspension wire, tensile strength at room temperature, 0.2% proof stress,
Elongation and conductivity were measured, and further, a high temperature creep rupture test was performed under the conditions of the time retention shown in Table 2 at a temperature of 200 ° C. and 300 ° C. in a N 2 gas atmosphere, and the time until fracture was measured. The results are shown in Table 2. Further, the suspension wires 1 to 5 of the present invention and the conventional suspension wire were repeatedly subjected to a bending test, and the number of times of bending until breakage was measured. The results are also shown in Table 2. In the repeated bending test, the inner radius of bending is 2.5 times the wire diameter, and the bending direction is 90 ° from the vertical position, then returned to the original position, once, and then in the opposite direction. After bending to 90 °, it was returned to the original position, this was repeated twice, and this was repeated.
【0012】[0012]
【表1】 [Table 1]
【0013】[0013]
【表2】 [Table 2]
【0014】[0014]
【発明の効果】表1および表2に示される結果から、酸
素含有量:20ppm 以上の従来吊架線に比べて酸素含有
量:10ppm 以下の本発明吊架線1〜5はいずれも高温
クリープ強度に優れていることがわかる。したがって、
この発明の吊架線は現在および将来にわたって予測され
る苛酷な環境下にあっても安心して使用することがで
き、さらに、この発明の吊架線はき電線としても使用す
ることができるものである。From the results shown in Tables 1 and 2, the suspension lines 1 to 5 of the present invention having an oxygen content of 10 ppm or less have higher high temperature creep strength than the conventional suspension line having an oxygen content of 20 ppm or more. It turns out to be excellent. Therefore,
The suspension overhead wire of the present invention can be safely used even under the severe environment predicted now and in the future, and can also be used as the suspension overhead wire of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 前 義治 埼玉県大宮市北袋町一丁目297番地 三菱 マテリアル株式会社中央研究所内 (72)発明者 古柴 豊 東京都千代田区丸の内一丁目5番1号 三 菱マテリアル株式会社内 (72)発明者 矢島 健児 埼玉県大宮市北袋町一丁目297番地 三菱 マテリアル株式会社中央研究所内 (72)発明者 石橋 俊司 東京都千代田区丸の内一丁目5番1号 三 菱マテリアル株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiharu Mae, 1-297 Kitabukuro-cho, Omiya-shi, Saitama, Central Research Laboratory, Mitsubishi Materials Corporation (72) Yutaka Furushiba 1-5-1-3, Marunouchi, Chiyoda-ku, Tokyo Ryo Materials Co., Ltd. (72) Inventor Kenji Yajima 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Materials Corporation Central Research Laboratory (72) Inventor Shunji Ishibashi 1-5-1, Marunouchi, Chiyoda-ku, Tokyo Sanritsu Materials Within the corporation
Claims (1)
r:0.01〜0.3%、酸素:10ppm 以下を含有
し、残りがCuおよび不可避不純物からなる組成の銅合
金線からなることを特徴とする吊架線。1. Cr: 0.15 to 1% by weight, Z
A suspended overhead wire comprising a copper alloy wire containing r: 0.01 to 0.3%, oxygen: 10 ppm or less, and the balance of Cu and inevitable impurities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12547193A JP3351023B2 (en) | 1993-04-28 | 1993-04-28 | Suspension line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12547193A JP3351023B2 (en) | 1993-04-28 | 1993-04-28 | Suspension line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06316735A true JPH06316735A (en) | 1994-11-15 |
JP3351023B2 JP3351023B2 (en) | 2002-11-25 |
Family
ID=14910913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12547193A Expired - Lifetime JP3351023B2 (en) | 1993-04-28 | 1993-04-28 | Suspension line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3351023B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010084989A1 (en) * | 2009-01-26 | 2010-07-29 | 古河電気工業株式会社 | Electrical wire conductor for wiring, method for producing electrical wire conductor for wiring, electrical wire for wiring, and copper alloy wire |
US20140120743A1 (en) * | 2011-06-15 | 2014-05-01 | Heraeus Materials Technology Gmbh & Co. Kg | Wire for sliding contacts, and sliding contacts |
CN105838915A (en) * | 2015-02-04 | 2016-08-10 | Jx金属株式会社 | Copper alloy strip, large current electronic element comprising same, and heat dissipating electronic element comprising same |
-
1993
- 1993-04-28 JP JP12547193A patent/JP3351023B2/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010084989A1 (en) * | 2009-01-26 | 2010-07-29 | 古河電気工業株式会社 | Electrical wire conductor for wiring, method for producing electrical wire conductor for wiring, electrical wire for wiring, and copper alloy wire |
JP2011210730A (en) * | 2009-01-26 | 2011-10-20 | Furukawa Electric Co Ltd:The | Wire conductor for wiring, method for manufacturing the same, electric wire for wiring, and copper alloy element wire |
EP2385530A1 (en) * | 2009-01-26 | 2011-11-09 | Furukawa Electric Co., Ltd. | Electrical wire conductor for wiring, method for producing electrical wire conductor for wiring, electrical wire for wiring, and copper alloy wire |
US8624119B2 (en) | 2009-01-26 | 2014-01-07 | Furukawa Electric Co., Ltd. | Conductor of an electrical wire for wiring, method of producing a conductor of an electrical wire for wiring, electrical wire for wiring, and copper alloy solid wire |
EP2385530A4 (en) * | 2009-01-26 | 2014-08-06 | Furukawa Electric Co Ltd | Electrical wire conductor for wiring, method for producing electrical wire conductor for wiring, electrical wire for wiring, and copper alloy wire |
KR101521408B1 (en) * | 2009-01-26 | 2015-05-18 | 후루카와 덴키 고교 가부시키가이샤 | Electrical wire conductor for wiring, method for producing electrical wire conductor for wiring, electrical wire for wiring, and copper alloy wire |
US20140120743A1 (en) * | 2011-06-15 | 2014-05-01 | Heraeus Materials Technology Gmbh & Co. Kg | Wire for sliding contacts, and sliding contacts |
CN105838915A (en) * | 2015-02-04 | 2016-08-10 | Jx金属株式会社 | Copper alloy strip, large current electronic element comprising same, and heat dissipating electronic element comprising same |
Also Published As
Publication number | Publication date |
---|---|
JP3351023B2 (en) | 2002-11-25 |
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