| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cu-Cr-Zr alloy having excellent high temperature strength, thermal conductivity and fatigue resistance, to provide its production method and to provide a cooling roll for continuous casting excellent in a service life and used for continuous casting of a twin roll system or the like in which a local heat cycle load for a short time compared with a conventional system is applied. SOLUTION: This Cu-Cr-Zr alloy excellent in fatigue characteristics has a composition containing, by mass, 0.3 to 0.8% Cr, 0.10 to 0.15% Zr, <=0.04% Fe and <=0.02% Ti, and the balance Cu with inevitable impurities, and in which the maximum diameter of clusters composed of single Zr-based inclusions or plural Zr-based inclusions is <=15μm.
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