Metal treatment – Stock – Ferrous
Reexamination Certificate
2011-04-26
2011-04-26
Yee, Deborah (Department: 1733)
Metal treatment
Stock
Ferrous
C148S327000, C148S607000, C148S608000, C148S547000
Reexamination Certificate
active
07931758
ABSTRACT:
A thermal mechanical treatment method includes hot working a precipitation hardening martensitic stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the thermal mechanical treatment does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel. An article includes a precipitation hardening martensitic stainless steel having a process history that includes hot working the stainless steel, quenching the stainless steel, and aging the stainless steel. According to certain embodiments, the process history does not include solution heat treating the stainless steel prior to aging or cryogenically cooling the stainless steel.
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Cao Wei-Di
McDevitt Erin T.
ATI Properties Inc.
Grosselin, III John E.
K & L Gates LLP
Viccaro Patrick J.
Yee Deborah
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