| 摘要 |
PURPOSE:To improve tensile strength, elongation and solderability by using a copper alloy, in which Sn, Mg, P are made to be contained in Cu and an unavoidable impurity, as a lead material. CONSTITUTION:A copper-alloy molten metal in which 0.05-0.5% Sn, 0.02-0.1% P and 0.02-0.15% Mg are made to be contained in Cu and an unavoidable impurity is prepared. The copper-alloy molten metal is changed into an ingot through a semi-continuous casting method, turned into a hot stretching plate through hot rolling, and cooled by water, and the upper and lower surfaces of the hot stretching plate are faced. Cold rolling and age treatment are repeated alternately and executed, and finally a stripe material in 0.25mm thickness is manufactured, and subjected to stress-relief annealing. |
