Patent ID: 8122941

Claim:
A method of manufacturing a cylinder liner for a vehicle, comprising: adding 50˜500 ppm of phosphorus (P) to a molten aluminum alloy, wherein aluminum is a basic component in the molten aluminum alloy, stabilizing the molten aluminum alloy including the phosphorus (P), and then continuous-casting the reformed molten aluminum alloy to form a round bar by transferring the molten aluminum alloy from a holding furnace to a mold connected to dies, wherein oxygen and nitrogen gases are supplied to an inner wall of the die at a pressure of 7˜15 kg f /cm 2 and a lubricant is supplied thereto at a flow rate of 5˜10 cc/min such that the molten aluminum alloy is solidified while not becoming adhered to the inner wall of the die, and wherein a cooling zone having a coolant rate of 30˜60 liter/min is formed in the die to control a molding speed of the molten aluminum alloy to 80˜120 mm/min; hot-forging the round bar to forming a cylindrical liner; and machining an internal surface of the cylindrical liner.