A HIGH STRENGTH CAST ALUMINUM ALLOY WITH ACCELERATED RESPONSE TO HEAT TREATMENT

摘要

The invention relates to an improved cast Al alloy designed to provide an accelerated response to heat treatment; specifically, the alloy's response to thermal growth during aging is accelerated, leading to a dimensionally more stable casting. This improvement is achieved by the addition of trace amounts of Sn, In, Ge or Cd to an Al-Si-Cu cast alloy. The improved alloy has particular application for cast Al engine blocks and cylinder heads.