Method of manufacturing aluminum conductor wires

• US 3,952,571 A
• Filed: 01/30/1975
• Issued: 04/27/1976
• Est. Priority Date: 02/12/1974
• Status: Expired due to Term

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Yokota, Minoru, Sato, Ken-Ichi, Higashimoto, Takenobu
• Primary Examiner(s): Mehr, Milton S.
• Application Number:
  US05/545,693
• Time in Patent Office: 453 Days
• Field of Search: 72/274, 72/278, 72/286, 29/DIG. 2, 29/DIG. 11, 148/11.5 R
• US Class Current: 72/286
• CPC Class Codes: B21C 37/04 of bars or wire wire-like electrical connectors in or for semiconductor devices H01L24/42
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon

Abstract

The present invention relates to a method of manufacturing aluminum wires for communication cables, insulated electric wires, etc., from aluminum for electrical purposes or as an aluminum alloy for electric conductors containing various additive elements, which is characterized in that cold working of 80% or more is given to the product after hot working, then low temperature intermediate annealing is carried out at a temperature of 100° - 280°C, then cold drawing of 50% or more is given and a continuous annealing is carried out. A manufacturing method is thus provided for aluminum wires for communication cables, insulated electric wires, etc., having excellent overall properties of strength, electrical conductivity, ductility, etc., which is suitable for the modernized high-speed manufacturing line and which is superior with respect to productivity and workability.

Claims

1. A method of manufacturing aluminum wires for communication cables, insulated electric wires and the like from an initial work material of aluminum for electrical purposes or an aluminum alloy for electrical conductors containing various additive elements, comprising the steps of hot working the initial work material, then cold working the material 80% or more, then applying a low temperature intermediate annealing treatment to the material at 100°

C to 280°

C, then further cold drawing the material 50% or more, and then continuously annealing the worked material.

2. The method of manufacturing aluminum wires for electrical conductors as claimed in claim 1, which is characterized by the step of cold drawing the material 10 to 30% after the step of continuous annealing is carried out.