Copper alloy mold for casting aluminum or aluminum alloy

摘要

A mold for casting aluminum or aluminum alloy made of a copper alloy having a thermal conductivity of not less than 0.20 cal/s.cm DEG C. The mold cavity surface is locally or entirely formed with a coated layer. The coated layer may be either (i) a cermet layer including of at least one element selected from the group consisting of Co, Cu, Cr and Ni, or (ii) a Co-, Ni-, Cr -or Mo-based hard alloy layer. The copper alloy mold exhibits distinguished thermal conductivity and resistance to melt damages.