| 摘要 |
Nickel-iron alloys comprise: .49.0%.Ni .0.1%.C .balance.Fe or .42.5%.Ni .5.7%.Cr .0.1%.C .balance.Fe A gold/silver alloy comprises: .gold.10-75% .silver.balance .e.g. Au.58.3% .Ag.41.7%ALSO:A metal tape of a nickel alloy consisting of 49.0% Ni, 0.1% C, balance Fe, or 42.5% Ni, 5.7% Cr, 0.1% C, balance Fe, or the alloys known as "Niron," "Invar" and "Kovar" (Trade Marks) is clad with a gold-silver alloy, the latter containing 10-75% gold and preferably 58.3% gold and 41.7% silver. The tape is embedded at one end into a glass powder composition and heated in air to 1200 DEG F. or 1300 DEG F. for various cycle periods up to 30 minutes. It is intended for use as a lead in electrical apparatus in which the lead is sealed to glass. |
