| 摘要 |
PURPOSE:To obtain a Cu alloy having superior mechanical properties, drawability and solderability without remarkably reducing the electric conductivity by cold working a Cu-Fe alloy contg. a specified amount of Fe after hot working and by carrying out precipitation treatment. CONSTITUTION:A Cu-Fe alloy contg. 5-15% Fe is subjected to precipitation treatment at 500 deg.C for 100min, and it is cold worked at 50% working rate to obtain an electrically conductive Cu alloy having >=55% electric conductivity in IACS unit, >=60kg/mm.<2> tensile strength, and >=80% expansion rate on the basis of JIS with respect to solderability. When a Cu-Fe alloy contg. 6-12% Fe, 0.02-0.1% misch metal and 0.3-0.6% Mg2Si is used in place of said Cu-Fe alloy, an electrically conductive Cu-Fe alloy having further improved castability, cold workability and >=62kg/mm.<2> tensile strength is obtd.
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