| 摘要 |
An insert casting structure (10) includes a cylinder liner (2) made of cast iron and inserted within aluminum alloy through insert casting and having a plurality of projections (5) on an outer circumferential surface (4) of the cylinder liner (2), wherein when the thickness of a cast iron portion to the base of the projection is set as L1, and the thickness of an integrated piece made up of the cast iron portion and an aluminum alloy portion is set as L2, the thermal conductivity is 35 to 80 W/mK when measured under the condition of L1/L2 = 0.45. |
