MANUFACTURE OF IRON ALLOY HAVING SATISFACTORY RESISTANCE TO STRESS CORROSION CRACKING

PURPOSE:To obtain the titled iron alloy capable of satisfying requirements for the improvement of reliability and having satisfactory solderability by specifying conditions during final heat treatment when an Fe-Ni-Co alloy having a low coefft. of thermal expansion is manufactured. CONSTITUTION:An i...

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Bibliographische Detailangaben
Hauptverfasser: TSUJI MASAHIRO, TOE TAMIO
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE:To obtain the titled iron alloy capable of satisfying requirements for the improvement of reliability and having satisfactory solderability by specifying conditions during final heat treatment when an Fe-Ni-Co alloy having a low coefft. of thermal expansion is manufactured. CONSTITUTION:An iron alloy consisting of 25-34wt% Ni, 14-20wt% Co and the balance Fe, having a low coefft. of thermal expansion and useful as a lead material for a semiconductor device or a material for sealing glass is manufactured. At this time, the iron alloy is finally heat treated at such a low temp. as