Abstract
The most widely used material for aluminum cylinder heads is 356 alloy, because of the excellent elongation. However, in line with the higher performance required in the diesel engine, which has the surface of combustion chamber on the cylinder head, estimated to be up to 573k in maximum ascent temperature, heat cracks have often occurred in the weakened matrix of the casting.
This paper is aimed at improving the mechanical properties of aluminum cylinder head castings, by local reinforcement using laser re-melting and cladding.