Mould made of a precipitation hardenable copper alloy

摘要

An age-hardening copper alloy comprises (wt.%) cobalt (0.4-2) which maybe partially substituted by nickel; beryllium (0.1-0.5); and copper (being balance). Independent claims are also included for: (a) a casting mold having maximum average grain size of 1.5 mm as ASTM E 112, a hardness of ≥ 170 HBW, and an electrical conductivity of ≥ 26 Sm/mm<2> produced from the copper alloy by hot working solution treatment at 850-980 degrees C, cold working up to 30% and age-hardening at 400-550 degrees C for 2-32 hours; and (b) a sleeve of a continuous casting roll of a two-roll casting installation that is submitted to a changing temperature stress under high roll pressures during close to final dimension casting of strips made of non-ferrous metals made of the copper alloy.