| 摘要 |
PURPOSE:To provide remarkable machinability to 'Kovar(R)' by adding a specified amount of Pb to the alloy. CONSTITUTION:Remarkable machinability is provided to 'Kovar(R)' which is an Fe-Ni-Co alloy contg. 0.02-0.03wt% S by adding 0.05-0.5wt% Pb to the alloy or further adding a rare earth element by (3-5)XS%. Zr and/or B may be further added by 0.0005-0.01wt%.
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