Preparation and Properties of Copper Alloy for Overhead Contact System of High Speed Railway

Xiao Jin; Zhang Wanying; Zhang Xinyun

doi:10.15980/j.tzzz.2020.07.026

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Preparation and Properties of Copper Alloy for Overhead Contact System of High Speed Railway
Vol. 40, Issue 7, Pages: 808-812(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.07.026

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[1]肖矜,张万营,张新云.高速铁路接触网用铜合金的制备与性能[J].特种铸造及有色合金,2020,40(07):808-812.

Xiao Jin, Zhang Wanying, Zhang Xinyun. Preparation and Properties of Copper Alloy for Overhead Contact System of High Speed Railway. [J]. Special Casting & Nonferrous Alloys 40(7):808-812(2020)
[1]肖矜,张万营,张新云.高速铁路接触网用铜合金的制备与性能[J].特种铸造及有色合金,2020,40(07):808-812. DOI： 10.15980/j.tzzz.2020.07.026.

Xiao Jin, Zhang Wanying, Zhang Xinyun. Preparation and Properties of Copper Alloy for Overhead Contact System of High Speed Railway. [J]. Special Casting & Nonferrous Alloys 40(7):808-812(2020) DOI： 10.15980/j.tzzz.2020.07.026.

摘要

研究了室温冷轧、低温轧制、低温轧制+中间时效3种不同冷轧方式对时效态Cu-1Cr-0.15Zr合金显微组织和力学性能的影响。结果表明

低温轧制有助于时效态改善Cu-1Cr-0.15Zr合金的硬度

且经过中间时效处理后

时效态Cu-1Cr-0.15Zr合金的硬度和电导率会进一步提高;无论是冷轧态还是时效态

低温轧制+中间时效试样的抗拉强度都高于室温轧制和低温轧制试样

且峰时效态低温轧制+中间时效试样的电导率最高。室温轧制、低温轧制和低温轧制+中间时效试样的磨损体积分别为0.682、0.191和0.054mm

时效处理后的低温轧制+中间时效试样的耐磨性最好;其抗拉强度和耐磨性都高于室温轧制和低温轧制试样

这主要与合金中孪晶/基体片层间距较小以及弥散析出的细小壳状富Cr相有关。

Abstract

The effects of three different cold rolling methods on the microstructure and mechanical properties of aged Cu-1Cr-0.15Zr alloy were investigated.The results show that low temperature rolling can improve the hardness of the aged Cu-1Cr-0.15Zr alloy

and the hardness and electric conductivity of the aged Cu-1Cr-0.15Zr alloy will be further improved after the intermediate aging treatment.The tensile strength of the low temperature rolled and intermediate aged samples is higher than that of the ambient rolled and low temperature rolled samples

and the electric conductivity of the peak aged with low temperature and intermediate aged samples has the highest value.The wear volume of the samples of room temperature rolling

low temperature rolling and low temperature+intermediate aging is 0.682

0.191 and 0.054 mm

respectively.The wear resistance of the samples of low temperature+intermediate aging after aging present desirable.The tensile strength and wear resistance of the samples of low temperature+intermediate aging after aging are higher than those of the samples at room temperature rolling and low temperature rolling

which is mainly attributed to the small distance between twin/matrix layers in the alloy and more fine core-shell like Cr rich phases with dispersion strengthening effect.