Copper-based alloy casting process

摘要

A cost-effective process for providing a copper-based alloy casting, which has superior wear characteristics, to a cylinder block is described. The process includes providing a negative pressure around the cylinder block and a copper-based alloy. The process further includes heating the copper-based alloy to a submolten state for immersing the cylinder block within such, while promoting the entrained gas within the copper-based alloy to migrate in a given direction and terminate in a specified portion of the copper-based alloy to effectively control porosity. The process further includes cooling the immersed cylinder block in the given direction to effectively reduce microshrinkage of the copper-based alloy.