| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat treatment method and a heat treatment apparatus of a conductor for a cable, which enable a running linear speed of the conductor of at least 150 m/min and which do not cause roughness of a tin plating layer without reducing softening and elongation characteristics of the conductor. <P>SOLUTION: The heat treatment of a conductor for a cable is carried out by heating the tin plated copper conductor 1 to a temperature above the melting point of the tin plating by energization between first and second power feeding sheaves 6a and 6b, and then, cooling the conductor by immersing it in cooling water 5 of a cooling device 4. The linear speed of the conductor is made 150 m/min or more, and the second power feeding sheave 6b located at a downstream side is disposed in the cooling water. When the circumference length of a cross section of the conductor 1 is 1.47-1.80 mm, the temperature of the cooling water is 28-30°C; and when the circumference length of a cross section of the conductor is 0.67-0.70 mm, the temperature of the cooling water is 38-40°C. The cooling of the conductor is started before the conductor reaches the second power feeding sheave. <P>COPYRIGHT: (C)2012,JPO&INPIT |
