| 摘要 |
A terminal in which a decrease in a strength and a decrease in a thickness of the weld portion are suppressed and cracking during the crimping process is suppressed. A terminal of the present disclosure includes a connector portion, a tubular crimp portion that crimps and joins with an electric wire, and a transition portion that joins the connector portion and the tubular crimp portion, the tubular crimp portion being composed of a metal member including a base material, an under layer formed thereon, and a coating layer formed on the base material and/or the under layer, the base material being composed of copper or a copper alloy and having a thickness of 0.20-1.40 mm, the under layer being composed of nickel, a nickel alloy, cobalt or a cobalt alloy and having a thickness of 0.0-0.8 µm, the coating layer being composed of tin, a tin alloy, nickel, a nickel alloy, silver or a silver alloy and having a thickness of 0.2-3.0 µm, the tubular crimp portion having a weld portion formed by butt welding the metal member, the weld portion having, in a cross section of the weld portion perpendicular to a longitudinal direction of the terminal, a phase existing therein of tin, a tin alloy, nickel, a nickel alloy, silver or a silver alloy that is greater than 0.01 µm 2 , the tubular crimp portion being formed into a closed tubular body in which one end opposite to an electric wire insertion opening is closed. |
