Heat resistant alloy adapted to precipitate fine Ti-Nb-Cr...

Details Heat resistant alloy adapted to precipitate fine Ti-Nb-Cr... Heat resistant alloy adapted to precipitate fine Ti-Nb-Cr...

2011-06-14

2011-06-14

Yee, Deborah (Department: 1733)

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

C420S047000, C420S048000, C420S051000, C420S053000, C420S055000, C420S584100, C420S586100, C420S451000, C420S452000, C420S453000

Reexamination Certificate

active

07959854

ABSTRACT:
A heat resistant alloy comprising, in % by weight, over 0.6% to not more than 0.9% of C, up to 2.5% of Si, up to 3.0% of Mn, 20 to 28% of Cr, 8 to 55% of Ni, 0.01 to 0.8% of Ti and 0.05 to 1.5% of Nb, the balance being Fe and inevitable impurities, the value of (Ti+Nb)/C being 0.12 to 0.29 in atomic % ratio. When the alloy further contains up to 0.5% of Zr, the value of (Ti+Nb+Zr)/C is 0.12 to 0.29 in atomic % ratio. When the alloy is heated at a temperature of at least about 800 degrees C., a fine Ti—Nb—Cr carbide or Ti—Nb—Zr—Cr carbide precipitates within grains to thereby retard creep deformation and give an improved creep rupture strength. The alloy is therefore suitable as a material for hydrogen production reforming tubes.

REFERENCES:
patent: 4077801 (1978-03-01), Heyer et al.
patent: 5019331 (1991-05-01), Yoshimoto et al.
patent: 5077006 (1991-12-01), Culling
patent: 5194221 (1993-03-01), Culling
patent: 2003/0188808 (2003-10-01), Ueta et al.
patent: 1095425 (1994-11-01), None
patent: 391381 (1990-10-01), None
patent: 1352983 (2003-10-01), None
patent: 1544614 (1979-04-01), None
patent: 52017311 (1977-02-01), None
patent: 56-169755 (1981-12-01), None
patent: 56169755 (1981-12-01), None
patent: 5-230601 (1993-09-01), None
patent: 05-239599 (1993-09-01), None
patent: 5-239599 (1993-09-01), None
patent: 06254666 (1994-09-01), None
patent: 07-233446 (1995-09-01), None
patent: 7-233446 (1995-09-01), None
patent: 9-53154 (1997-02-01), None
patent: 2001-247940 (2001-09-01), None
patent: 2125110 (1999-01-01), None
patent: 91/16467 (1991-10-01), None
International Preliminary Report on Patentability mailed May 6, 2008, issued in corresponding International Patent Application No. PCT/JP2006-322064 with Forms PCT/IB/338, PCT/IB/373, and PCT/ISA/237.
International Search Report of PCT/JP2006/322064, date of mailing Jan. 30, 2007.
European Search Report dated Nov. 30, 2009, issued in corresponding European Patent Application No. 06832421.9.

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