MELTED-SOLIDIFIED MATTER, COPPER ALLOY MATERIAL FOR MELTING-SOLIDIFICATION, AND PROCESS FOR PRODUCING THE SAME

摘要

A melted-solidified matter having a melted-solidified portion formed by welding, deposit welding, thermal spray or fusion. The melted-solidified portion has an alloy composition comprising 0.0005 to 0.05 mass% Zr, 0.01 to 0.35 mass% P and the balance of Cu wherein the content of P [P] and the content of Zr [Zr] satisfy the relationship: [P]/[Zr]=0.3 to 200, and has an average crystal grain diameter of ≤ 300 μm in the macrostructure after melting-solidification. In the event where Fe and/or Ni is contained as unavoidable impurities in the melted-solidified portion, when either thereof is contained, the content of Fe or Ni is restricted to ≤ 0.3 mass%. When Fe and Ni are contained, the total content thereof is restricted to ≤ 0.4 mass%.