Austenitic alloy for heat strength with improved pouring and...

Details Austenitic alloy for heat strength with improved pouring and... Austenitic alloy for heat strength with improved pouring and...

2005-05-24

2005-05-24

Yee, Deborah (Department: 1711)

Metal treatment

Stock

Ferrous

C148S541000, C148S542000, C148S547000, C148S653000, C148S598000, C148S609000, C148S597000, C420S047000, C420S048000

Reexamination Certificate

active

06896747

ABSTRACT:
Austenitic alloy for high-temperature strength with improved pourability and manufacturing, of which the composition comprises, in weight-%:0.010%<carbon<0.04%0%<nitrogen<0.01%silicon<2%16%<nickel<19.9%manganese<8%18.1%<chromium<21%1.8%<titanium<3%molybdenum<3%copper<3%aluminum<1.5%boron<0.01%vanadium<2%sulfur<0.2%phosphorous<0.04%and possibly up to 0.5% of at least one element chosen from among yttrium, cerium, lanthanum and other rare earths, the remainder being iron and impurities resulting from manufacturing or deoxidizing, the said composition also satisfying the two following relationships:in relationship to the solidification mode:in-line-formulae description="In-line Formulae" end="lead"?remaindera=eq. Nia−0.5×eq. Cra<3.60 where eq. Cra=Cr+0.7×Si+0.2×Mn+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Nia=Ni+22×C+0.5×Cu,in-line-formulae description="In-line Formulae" end="tail"?in relationship to the rate of residual ferrite:in-line-formulae description="In-line Formulae" end="lead"?remainderb=eq. Nib−2×eq. Crb>−41 where eq. Crb=Cr+0.7×Si+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Nib=Ni+22×C+0.5×Cu+0.5×Mn.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 3065067 (1962-11-01), George
patent: 3065068 (1962-11-01), Reynolds et al.
patent: 3169858 (1965-02-01), Raymond
patent: 3201233 (1965-08-01), Hull
patent: 3795552 (1974-03-01), Barbis et al.
patent: 5945067 (1999-08-01), Hibner et al.
patent: 0 669 405 (1995-08-01), None
patent: 2727982 (1996-06-01), None
Patent Abstracts of Japan, vol. 013, No. 208, May 16, 1989.
Patent Abstracts of Japan, vol. 009, No. 153, Jun. 27, 1985.

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