Metal composite wire

Abstract

The present invention discloses a metal composite wire capable of increasing a tightness degree of copper-aluminum bonding. The metal composite wire includes a metal core rod. Continuous spiral grooves are formed in a surface of the core rod. The core rod is cladded with a metal cladding layer with higher electrical conductivity than the core rod. An average depth of the continuous spiral grooves ≤1/10 of a thickness of the metal cladding layer. By setting the thickness of the metal cladding layer as t1, a specific gravity of the metal cladding layer as ρ1, a diameter of the core rod as R, the average depth of the continuous spiral grooves as h, and a specific gravity of the core rod as ρ2, t 1 = ( R - h ) 2 × ρ 1 + k × ( R - h ) 2 × ρ 2 - k × ( R - h ) 2 × ρ 1 ( 1 - k ) × ρ 1 + h - R , and 0.2 ≤ k ≤ 0.7 . The metal composite wire of the present invention can be widely applied to cable conductors and cable shielding braiding layers.

Dependencies are inferred from the claim text.