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-(Cr) alloy having a low coefft. of thermal expansion is manufactured. CONSTITUTION:An...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	TSUJI MASAHIRO, TOE TAMIO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
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-(Cr) alloy having a low coefft. of thermal expansion is manufactured. CONSTITUTION:An iron alloy consisting of 30-55wt% Ni and the balance Fe or further contg. 3-8wt% Cr, 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 high temp. as >=600 deg.C in a nonoxidizing atmosphere. The dew point of the atmospheric gas has been regulated to -20--50 deg.C. By the heat treatment, a thin surface oxide film having satisfactory solderability is formed and an iron alloy showing resistance to stress corrosion cracking is obtd.