TECHNICAL FIELD

The present disclosure relates to a covered electrical wire, a terminal-equipped electrical wire, a copper alloy wire, and a copper alloy stranded wire.

The present application claims priority based on Japanese patent application No. 2018-154530 dated Aug. 21, 2018, and incorporates all the contents described in the above Japanese application.

BACKGROUND ART

Conventionally, a wire harness composed of a plurality of terminal-equipped electrical wires bundled together is used for a wiring structure of an automobile, an industrial robot or the like. A terminal-equipped electrical wire is an electrical wire having a terminal such as a crimp terminal attached to a conductor exposed at an end of the electrical wire through an insulating cover layer. Typically, each terminal is inserted into one of terminal holes provided in a connector housing, and is mechanically connected to the connector housing. The electrical wire is connected to the body of a device via the connector housing. Such connector housings may be connected together to thus connect electrical wires together. Copper or a similar, copper-based material is mainly used as a constituent material of the conductor (for example, see PTLs 1 and 2).

CITATION LIST

Patent Literature

PTL 1: Japanese Patent Laying-Open No. 2014-156617

PTL 2: Japanese Patent Laying-Open No. 2018-77941

SUMMARY OF INVENTION

According to the present disclosure, a covered electrical wire is

a covered electrical wire comprising a conductor and an insulating covering layer provided outside the conductor,

the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and having a wire diameter of 0.5 mm or less,

the copper alloy containing

Ni, or Ni and Fe in an amount of 0.1% by mass or more and 1.6% by mass or less in total, and

P in an amount of 0.05% by mass or more and 0.7% by mass or less,

with a balance being Cu and impurities,

in the copper alloy, a ratio of precipitation of P to solid solution of P being 1.1 or more.

According to the present disclosure, a terminal-equipped electrical wire comprises: the presently disclosed covered electrical wire; and a terminal attached to an end of the covered electrical wire.

According to the present disclosure, a copper alloy wire is composed of a copper alloy that contains

Ni, or Ni and Fe in an amount of 0.1% by mass or more and 1.6% by mass or less in total, and

P in an amount of 0.05% by mass or more and 0.7% by mass or less,

with a balance being Cu and impurities,

in the copper alloy, a ratio of precipitation of P to solid solution of P being 1.1 or more, and has

a wire diameter of 0.5 mm or less.

According to the present disclosure, a copper alloy stranded wire is formed of a plurality of copper alloy wires, each as presently disclosed, twisted together.

