WEAR-RESISTANT COPPER ALLOY FOR OVERLAYING AND VALVE SHEET

摘要

A wear-resistant copper alloy for overlaying and a valve sheet, characterized in that it has a chemical composition, in wt %, that nickel: 5.0 to 24.5 %, iron: 3.0 to 20.0 %, silicon: 0.5 to 5.0 %, boron: 0.05 to 0.5 %, chromium: 0.3 to 5.0 %, one or more of molybdenum, tungsten and vanadium: 3.0 to 20.0 %, and the balance: Cu and inevitable impurities. The above wear-resistant copper alloy for overlaying and valve sheet exhibit excellent wear resistance, while securing good overlaying characteristics and good resistance to cracking.