Heat treatment method for reducing polythionic acid stress corrosion cracking

Heat treatment method for reducing polythionic acid stress corrosion cracking

A heat treatment of alloy 617 generally including 732 DEG C-927 DEG C (1350 DEG F-1700 DEG F) for about one hour. The resultant discontinuous carbide network in the grain boundaries inhibits stress corrosion crack growth in polythionic acid environments. Alloy 617 generally comprises 20-24% Cr, 9.5-...

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Bibliographische Detailangaben
Hauptverfasser: GANESAN, PASUPATHY, CRUM, JAMES R, LIPSCOMB, WILLIAM G
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:A heat treatment of alloy 617 generally including 732 DEG C-927 DEG C (1350 DEG F-1700 DEG F) for about one hour. The resultant discontinuous carbide network in the grain boundaries inhibits stress corrosion crack growth in polythionic acid environments. Alloy 617 generally comprises 20-24% Cr, 9.5-20% Co, 7-12% Mo, 0.8-1.5 Al, and less than 0.15% carbon, the balance being iron.