Method of producing a copper alloy wire rod and copper alloy wire rod

A method of producing a copper alloy wire rod, the method comprising a continuous casting and rolling step, in which a casting step for obtaining an ingot by pouring molten copper of a precipitation strengthening copper alloy into a belt-&-wheel or twin-belt movable mold, and a rolling step for rolling the ingot obtained by the casting step, are continuously performed,

• wherein an intermediate material of the copper alloy wire rod in the mid course of the rolling step or immediately after the rolling step is quenched at a temperature of 600° C. or higher;
• wherein the casting is conducted with controlling a ratio R represented by the following formula (1) to be 0.34 to 0.51, and optionally conducting a heating when R is greater than 0.51;
• R=(ΔT×V+A)÷{W×(H+T+C)} (1)
• wherein, ΔT is the cooling water temperature difference, V is a cooling water flow rate (m3/hr), W is a casting rate (kg/hr), H is a latent heat (kcal/kg), T is a casting temperature (° C.), C is a specific heat (kcal/kg·° C.), and A is an amount of evaporation heat (kcal/hr);
• and
• wherein the casting step and the rolling step are completed within 300 seconds after pouring the molten copper of the copper alloy into the movable mold.