JP4314949B2 - Trolley wire - Google Patents
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- JP4314949B2 JP4314949B2 JP2003334988A JP2003334988A JP4314949B2 JP 4314949 B2 JP4314949 B2 JP 4314949B2 JP 2003334988 A JP2003334988 A JP 2003334988A JP 2003334988 A JP2003334988 A JP 2003334988A JP 4314949 B2 JP4314949 B2 JP 4314949B2
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- 229910000881 Cu alloy Inorganic materials 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910000765 intermetallic Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000010006 flight Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Description
この発明は、電気鉄道における電車線のトロリ線に関するものである。 The present invention relates to a trolley line of a train line in an electric railway.
電気鉄道における電車線のトロリ線は、通常、Ｓｎを含有する銅合金からなるトロリ線が使用されており、例えば、質量％で（以下、％は質量％を示す）、Ｓｎ：０．０１〜０．３５％を含有し、残りがＣｕおよび不可避不純物からなる成分組成のＳｎ含有銅合金からなるトロリ線、またはこれにさらにＦｅ０．００１〜０．３％を添加して耐集電摩耗性、耐熱性および強度を改善したＳｎ含有銅合金からなるトロリ線などが知られている（特許文献１参照）。
近年、電気車の走行スピードが向上するとともに都市部においては便数が増加し、それに伴ってトロリ線が激しく消耗するため、トロリ線を短期間で張り替えなければならず、これら頻繁な保守のための経費が年々増加している。そのため、強度、導電率、耐熱性などを維持または向上させつつ、耐集電摩耗性を改良したトロリ線を開発し、トロリ線摩耗量を抑え、保守回数を減らすことが求められている。 In recent years, the driving speed of electric cars has improved and the number of flights has increased in urban areas. As a result, the trolley lines are consumed violently, so the trolley lines have to be replaced in a short period of time. Expenses are increasing year by year. Therefore, it has been demanded to develop a trolley wire with improved current-collecting wear resistance while maintaining or improving strength, electrical conductivity, heat resistance, etc., to suppress the amount of trolley wire wear and to reduce the number of maintenance.
そこで、本発明者等は、強度、耐熱性、耐集電摩耗性および導電性などが一層優れたトロリ線を開発すべく研究を行った結果、
従来のＳｎ：０．１〜０．５％含有するＳｎ含有銅合金に、Ｆｅ：０．０６〜０．３％およびＰ：０．００１〜０．１％を共に含有させたＳｎ含有銅合金は、素地中に高硬度のＦｅとＰの金属間化合物（例えば、Ｆｅ３Ｐ、Ｆｅ２Ｐなど）が析出し分散した組織を有し、かかるＳｎ含有銅合金からなるトロリ線は、従来のＳｎ含有銅合金からなるトロリ線に比べて耐集電摩耗性、引張強度、耐熱性および導電率が一層向上する、という研究結果が得られたのである。
Therefore, the present inventors have conducted research to develop a trolley wire that is further superior in strength, heat resistance, current collection wear resistance, and conductivity.
Conventional Sn: in 0.1 to 0.5% Sn-containing copper alloy containing, Fe: 0.06 ~0.3% and P: 0.001 to 0.1% of Sn-containing copper alloy in which both are contained Has a structure in which an intermetallic compound of high hardness Fe and P (for example, Fe 3 P, Fe 2 P, etc.) is precipitated and dispersed in the substrate, and a trolley wire made of such a Sn-containing copper alloy has a conventional structure. The research result that current collection wear resistance, tensile strength, heat resistance, and electrical conductivity were further improved as compared with a trolley wire made of an Sn-containing copper alloy was obtained.
この発明は、かかる研究結果に基づいてなされたものであって、
質量％で、Ｓｎ：０．１〜０．５％、Ｆｅ：０．０６〜０．３％、Ｐ：０．００１〜０．１％を含有し、残りがＣｕおよび不可避不純物からなる組成のＳｎ含有銅合金からなるトロリ線、に特徴を有するものである。
The present invention has been made based on the results of such research,
The composition of Sn: 0.1 to 0.5%, Fe: 0.06 to 0.3%, P: 0.001 to 0.1%, with the remainder consisting of Cu and inevitable impurities. It is characterized by a trolley wire made of Sn-containing copper alloy.
この発明のトロリ線は強度、耐集電摩耗性、耐熱性および導電性が一段と優れているために、トロリ線の交換など保守の回数を少なくすることができる。 Since the trolley wire of the present invention is further superior in strength, current collecting wear resistance, heat resistance and conductivity, the number of maintenance such as replacement of the trolley wire can be reduced.
この発明のトロリ線を構成する銅合金の成分組成を上記の如く限定した理由は下記の通りである。
Ｓｎ：
ＳｎはＣｕに固溶して耐集電摩耗性を向上せしめる成分であるが、Ｓｎが０．１％未満含有しても所望の効果が得られず、一方、Ｓｎが０．５％を越えて含有すると導電率が下がるので好ましくない。したがって、Ｓｎ：０．１〜０．５％の範囲となるように定めた。
The reason why the component composition of the copper alloy constituting the trolley wire of the present invention is limited as described above is as follows.
Sn:
Sn is a component that improves the current-collecting wear resistance by dissolving in Cu, but the desired effect cannot be obtained even if Sn is contained in an amount of less than 0.1%, while Sn exceeds 0.5%. If contained, the electrical conductivity is lowered, which is not preferable. Therefore, it was determined to be in the range of Sn: 0.1 to 0.5%.
Ｆｅ：
Ｆｅは素地に固溶して強度、耐熱性を向上させ、さらにＰと共に金属間化合物を析出させ素地中に均一分散することによりトロリ線の耐集電摩耗性を大幅に向上させる作用を有するが、その含有量が０．０６％未満では所望の効果が得られず、一方、０．３％を越えて含有するとトロリ線の導電率が低下するので好ましくない。したがって、Ｆｅ含有量を０．０６〜０．３％に定めた。
Fe:
Fe dissolves in the base material to improve strength and heat resistance, and further has the effect of greatly improving the current-collecting wear resistance of the trolley wire by precipitating intermetallic compounds with P and uniformly dispersing in the base material. If the content is less than 0.06 %, the desired effect cannot be obtained. On the other hand, if the content exceeds 0.3%, the conductivity of the trolley wire decreases, which is not preferable. Therefore, the Fe content is set to 0.06 to 0.3%.
Ｐ：
ＰはＦｅと共存させることにより金属間化合物を形成して素地中に析出し、それによって耐集電摩耗性を向上させる効果を有するが、Ｐが０．００１％未満含まれていても耐集電摩耗性に有効な量の金属間化合物を析出させることができず、一方、Ｐが０．１％を越えて含有するとトロリ線の導電率が急激に低下するので好ましくない。したがって、Ｐ：０．００１〜０．１％に以下に定めた。
P:
P coexists with Fe to form an intermetallic compound and precipitates in the substrate, thereby improving the current collecting wear resistance. However, even if P is contained in less than 0.001%, An amount of an intermetallic compound effective for electroabrasion cannot be deposited. On the other hand, if the P content exceeds 0.1%, the conductivity of the trolley wire is abruptly lowered, which is not preferable. Therefore, P is set to 0.001 to 0.1% as follows.
原料として通常の電気銅を用意し、この電気銅を黒煙るつぼに充填し、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ガスを黒煙ノズルを通して吹込み、１０分間続けて吹込んで溶銅を作製し、この溶銅中にＡｒガスを吹込みながら溶銅を撹拌しつつＦｅを添加し、次いでＰおよびＳｎを添加し、得られた銅合金溶湯を金型に鋳込んで直径：１５０mm、長さ：２５０mmの寸法を有する円柱状Ｓｎ含有銅合金鋳塊を得た。 Ordinary electrolytic copper is prepared as a raw material, this electrolytic copper is filled in a black smoke crucible, dissolved in an Ar gas atmosphere, and when the molten copper temperature reaches 1200 ° C., CO gas at a flow rate of about 10 L / min. Was blown through a black smoke nozzle for 10 minutes to produce molten copper, Fe was added while stirring the molten copper while blowing Ar gas into the molten copper, and then P and Sn were added. The obtained molten copper alloy was cast into a mold to obtain a cylindrical Sn-containing copper alloy ingot having a diameter of 150 mm and a length of 250 mm.
この円柱状Ｓｎ含有銅合金鋳塊をＣＯガス雰囲気中、温度：９００℃、１時間保持の条件で加熱したのち、直径：２０mmを有する粗圧延線を製造し、この粗圧延線の表面の酸化物を除去し、冷間引抜き加工を繰り返して最終的に直径：１２ｍｍの線材を作製した。このようにして得られたＳｎ含有銅合金線材を、さらに光輝焼鈍炉に装入し、ＣＯガス雰囲気中、温度：４５０℃に９０分間保持の時効処理を施すことにより表１に示される成分組成の本発明トロリ線１〜８、比較トロリ線１〜４および従来トロリ線１〜２を作製した。これらトロリ線についてＪＩＳ Ｅ ２１０１に示される方法で引張り強さを測定し、その結果を表１に示した。さらにＪＩＳ Ｃ ３００１に準拠した四端子法により１ｍで導電率を測定し、その結果を表１に示した。さらに半軟化温度を測定し、その結果を表１に示すことにより耐熱性を評価した。 After heating this cylindrical Sn-containing copper alloy ingot in a CO gas atmosphere at a temperature of 900 ° C. for 1 hour, a rough rolled wire having a diameter of 20 mm is produced, and the surface of the rough rolled wire is oxidized. The product was removed, and cold drawing was repeated to finally produce a wire with a diameter of 12 mm. The Sn-containing copper alloy wire thus obtained is further charged into a bright annealing furnace, and subjected to an aging treatment in a CO gas atmosphere at a temperature of 450 ° C. for 90 minutes, and the component composition shown in Table 1 Inventive trolley wires 1 to 8, comparative trolley wires 1 to 4 and conventional trolley wires 1 to 2 were prepared. The tensile strength of these trolley wires was measured by the method shown in JIS E 2101. The results are shown in Table 1. Furthermore, the electrical conductivity was measured at 1 m by a four-terminal method based on JIS C 3001, and the results are shown in Table 1. Further, the semi-softening temperature was measured, and the results are shown in Table 1 to evaluate the heat resistance.
さらに、図１に示される装置を用いて集電摩耗特性を評価した。図１は、集電摩耗特性を測定する為の装置の概略立面図であり、図１において、１は回転体、２はトロリ線、３はすり板、４は離線率計である。本発明トロリ線１〜８、比較トロリ線１〜６および従来トロリ線１〜２を図１に示されるように回転体１に巻き付け、一方、パンタグラフ用鉄系すり板（品名 ＴＦ−５Ａ）からなる集電板３を上記トロリ線に押付け力：２０Ｎで押付け、集電板３に２０Ａ、１００Ｖの直流電流を流しながら、上記回転体１を周速度：２０ｋｍ／ｈで６０分間回転し、集電摩耗量を求め、表１に示した。試験前後のトロリ線の重量を測定し、その重量減を集電摩耗量とした。集電摩耗量が少ない方が耐集電摩耗性に優れたトロリ線である。 Furthermore, the current collection wear characteristics were evaluated using the apparatus shown in FIG. FIG. 1 is a schematic elevational view of an apparatus for measuring current collecting wear characteristics. In FIG. 1, 1 is a rotating body, 2 is a trolley wire, 3 is a sliding plate, and 4 is a wire separation rate meter. The trolley wires 1 to 8, the comparative trolley wires 1 to 6 and the conventional trolley wires 1 to 2 of the present invention are wound around the rotating body 1 as shown in FIG. 1, while the pantograph iron-based sliding plate (product name: TF-5A). The current collector plate 3 is pressed against the trolley wire with a pressing force of 20 N, and the rotating body 1 is rotated at a peripheral speed of 20 km / h for 60 minutes while a 20 A, 100 V DC current is passed through the current collector plate 3 to collect current. The amount of electric wear was determined and shown in Table 1. The weight of the trolley wire before and after the test was measured, and the weight loss was defined as the current collection wear amount. A trolley wire with better current collection wear resistance has a smaller amount of current collection wear.
表１に示される結果から、本発明トロリ線１〜８は従来トロリ線１〜２に比べて引張り強さ、導電率および半軟化温度が著しく上昇し、さらに集電摩耗量が少ないところから本発明トロリ線１〜８は従来トロリ線１〜２よりも耐集電摩耗性に優れていることがわかる。しかし、この発明の条件から外れた成分組成を有する比較トロリ線１〜６は引張強さ、導電率、半軟化温度の少なくとも一つの特性が劣り、集電摩耗量が多くなり、耐集電摩耗性が劣ることがわかる。
したがって、この発明の成分組成を有するＳｎ含有銅合金で作製したトロリ線は頻繁に走行する電気鉄道における電車線のトロリ線として使用した場合、寿命が従来のＳｎ含有銅合金で作製したトロリ線よりも大幅に向上し、保守の回数を大幅に減らすことができ、それによってコスト削減に大いに貢献できるものである。
From the results shown in Table 1, the trolley wires 1 to 8 of the present invention have significantly increased tensile strength, electrical conductivity, and semi-softening temperature compared to the conventional trolley wires 1 and 2, and the amount of collected current is small. It turns out that invention trolley wires 1-8 are superior in current collection wear resistance than conventional trolley wires 1-2. However, the comparative trolley wires 1 to 6 having a component composition that deviates from the conditions of the present invention are inferior in at least one characteristic of tensile strength, electrical conductivity, and semi-softening temperature, increase in the amount of current collection wear, and current collection wear resistance. It turns out that the nature is inferior.
Therefore, when the trolley wire made of the Sn-containing copper alloy having the component composition of the present invention is used as a trolley wire of a train line in a frequently running electric railway, the life is longer than the trolley wire made of the conventional Sn-containing copper alloy. As a result, the number of maintenance operations can be greatly reduced, thereby greatly contributing to cost reduction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003334988A JP4314949B2 (en) | 2003-09-26 | 2003-09-26 | Trolley wire |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003334988A JP4314949B2 (en) | 2003-09-26 | 2003-09-26 | Trolley wire |
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| Publication Number | Publication Date |
|---|---|
| JP2005096679A JP2005096679A (en) | 2005-04-14 |
| JP4314949B2 true JP4314949B2 (en) | 2009-08-19 |
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