Patent ID: 8409375

Claim:
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 =(Δ T×V+A )÷{ W ×( H+T+C )} (1) wherein, ΔT is the cooling water temperature difference, V is a cooling water flow rate (m 3 /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.