| 摘要 |
PURPOSE:To provide a lead-based alloy with sufficient mechanical strength suitable for a maintenance-free battery by molding the lead-based alloy taking, as a chief ingredient, Pb added with a little of at least Ca and Sn into a desired shape at temperature higher than a specified one, and thereafter subjecting it to an age hardening treatment. CONSTITUTION:A lead-based alloy having Pb, as a main component, added with a little quantity of at least Ca and Sn is formed into a desired form at temperature over 50 deg.C, and thereafter subjected to an age hardening treatment. For a composition of respective components of said lead-based alloy, for example, Ca is made to range 0.02-0.15%, Sn 0.2-4.0%, and Pb the remaining fraction. Or, 0.03-1.5% Ag, 0.03-1.5% Cu, and 0.005-1.0% Al are preferably added singly or as a mixture of two kinds thereof or more. In addition, said age hardening treatment is preferably effected at temperature ranging about 50-170 deg.C. |
