High conductivity high strength electric vehicle overhead line and its producing method
A technology of high conductivity and manufacturing method, applied in the manufacture of high conductivity and high strength trolley overhead wire, in the field of high conductivity and high strength trolley overhead wire, to achieve high strength, high strength and heat resistance, and high conductivity.
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Embodiment 1
[0031] Samples of sample numbers 1 to 9 were produced by the continuous casting hot rolling method, and samples of sample numbers 10 to 14 were produced by a conventional method. They all take the process of melting→manufacturing→hot rolling→wire drawing→product as the basic manufacturing process of trolley wire.
[0032] First, molten copper alloys having chemical compositions shown in sample numbers 1 to 9 in Table 1 were continuously cast. Next, at the temperature and hot working rate shown in Table 1, it was hot-rolled to the diameter shown in Table 1 to obtain a wire rod. Next, the obtained wire rod was wire-drawn at the cold working temperature and cold working rate shown in Table 1 to the size described in the column of cross-sectional area. In addition, the processing rate of the above-mentioned hot rolling and cold working is expressed by [(cross-sectional area before processing-cross-sectional area after processing) / cross-sectional area before processing].
[0033]...
Embodiment 2
[0042] Using the trolley wire produced in Example 1, a loss test was performed in a state closer to actual use conditions, and the lifetime as a trolley wire was calculated. Among the trolley wires described above, the Vickers hardness, wear amount, and theoretical life were determined for samples with sample numbers 3, 11, 13, and 14. Among them, the size of sample numbers 3 and 11 is 110mm 2 , the remaining sample size is 170mm 2 .
[0043] The evaluation of the amount of loss was performed as follows. First, the trolley wire and the copper-based sintered slide plate slide at a speed of 50km / h, and the contact load with the slide plate is 7kgf (68.6N), and the trolley overhead line and the slide plate are slid under the state of applying a 200V DC voltage and a 200A current. 10 4 Second-rate. Then, the loss cross-sectional area of the trolley wire was obtained, the loss cross-sectional area was divided by the number of slides of the pantograph (slider), and the loss c...
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Abstract
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