High conductivity high strength electric vehicle overhead line and its producing method

Abstract

The invention relates to a trolley wire with high tensile-strength and electricity conductive rate and a manufacture method for the trolley wire which includes the following working procedures: obtaining casting material comprising 0.12to 0.3 weight percent of Ag, 0.01 to 0.05 percent weight of oxygen, copper and unavoidable impurities through continuous castling; carrying out thermal processing on the casting material with the temperature larger or equal to 600 DEG C and the thermal processing rate larger or equal to 80 percent to obtain a wire with the diameter larger or equal to 25mm; carrying out cold processing on the wire with the temperature less than or equal to 150 DEG C and the cold processing rate larger or equal to 70 percent to obtain the following trolley wire (1) or (2). When the nominal cross-sectional area of the trolley wire(1) is 150 to 170mm <2>, the tensile-strength is larger or equal to 400N / mm<2> and the electricity conductive rate is larger or equal to 97 IACS(percent); when the nominal cross-sectional area of the trolley wire(2) is 80 to 120 mm<2>, the tensile-strength is larger or equal to 420N / mm<2> and the electricity conductive rate is larger or equal to 97 IACS(percent).

Description

High-conductivity high-strength trolley overhead wire and manufacturing method thereof technical field The present invention relates to a trolley trolley wire with high electrical conductivity and high strength and a method for manufacturing the same. In particular, it relates to a method for manufacturing a high-conductivity high-strength trolley wire and a high-conductivity high-strength trolley wire that can also reduce manufacturing costs. Background technique As a material for trolley wires, hard copper made of ductile copper was first used in history, and it is still widely used today. Other copper alloys containing silver (Ag) introduced for improving heat resistance and copper alloys containing tin (Sn) for improving wear resistance are also actually used. Tram overhead lines have the problem of softening due to prolonged energization and heating, and softening due to short-term local temperature rise, so high heat resistance is required. In addition, high fricti...

AI Technical Summary

Problems solved by technology

Therefore, at present, only trolley overhead wires can be obtained that give up one of the characteristics of electrical conductivity or tensile strength