Trolley wire for electrical high speed railway

摘要

The trolley wire for an electrical high speed railway consists of at least a 3-component age-hardenable CuaCrbXc alloy and has a tensile strength (Rm) of at least 500 MPa and an electrical conductivity (k) of at least 60% w.r.t. annealed pure Cu (International Annealed Copper Standard). X = Al, Ni, Zn, In or Sn, and when X = Al, Ni, Zn or In, b = 0.2-0.8, or when X = Sn, b = 0.2-0.8; c = 0.01-0.4; a+b+c /= 100 with the inclusion of unavoidable impurity elements. Also claimed is a process for producing the above trolley wire comprising: (a) firstly producing an initial trolley wire by melting the Cu alloy and then slowly cooling; (b) turning the initial trolley wire by at least one cold forming process into an intermediary trolley wire; (c) pptn. hardening; and (d) opt. repeating steps (b) and (c). The final shape of the trolley wire is produced in the last cold forming process.