Patent ID: 6865807
Filing Date: 2005-03-15
Classification: B22D,Y10T

Abstract:
1. A cylinder block production method for producing a cylinder block in which a cast iron-made cylinder liner is enclosed within a cylinder block body by casting, comprising: a cast-enclosing step of enclosing the cylinder liner within the cylinder block body by casting, the cylinder block body comprising one of the group consisting of aluminum and an aluminum alloy, and the cylinder liner comprising flake graphite cast-iron; and washing an outer peripheral wall surface of the cylinder liner and eroding a portion of a base structure of the cast iron forming the outer peripheral wall surface of the cylinder liner so as to form many small protrusions on the outer peripheral wall surface, including a key-shaped small protrusion, by fan-jetting a high-pressure fluid onto the outer peripheral wall surface of the cylinder liner, prior to the cast-enclosing step in order to improve strength of adhesion between the cylinder liner and the cylinder block body; wherein a flow rate of the high pressure fluid is 2.67 to 10 L/min, and wherein a pressure of the high pressure fluid is 276 to 414 MPa.