Title:
Ni-Co-Cr HIGH TEMPERATURE STRENGTH AND CORROSION RESISTANT ALLOY
Document Type and Number:
WIPO Patent Application WO2001053548
Kind Code:
A3
Abstract:
A high strength, sulfidation resistant Cr-Co-Ni base alloy for long-life service at 538 DEG C to 816 DEG C containing in % by weight about 23.5-25.5 % Cr, 15.0-22 % Co, 0.2-2.0 % Al, 0.5-2.5 % Ti, 0.5-2.5 % Nb, up to 2.0 % Mo, up to 1.0 % Mn, 0.3-1.0 % Si, up to 3.0 % Fe, up to 0.3 % Ta, up to 0.3 % W, 0.005-0.08 % C, 0.01-0.3 % Zr, 0.001-0.01 % B, up to 0.05 % rare earth as misch metal, 0.005-0.025 % Mg plus optional Ca, balance Ni including trace additions and impurities. The alloy provides a combination of strength, ductility, stability, toughness and oxidation/sulfidation resistance so as to render the alloy range uniquely suitable for engineering applications where sulfur-containing atmospheres are life limiting, in applications such as exhaust valves for diesel engines and in tubes for coal-fired steam boilers.
Inventors:
SMITH GAYLORD D (US)
BAKER BRIAN A (US)
BAKER BRIAN A (US)
Application Number:
PCT/US2001/002247
Publication Date:
August 05, 2004
Filing Date:
January 24, 2001
Export Citation:
Assignee:
INCO ALLOYS INT (US)
SMITH GAYLORD D (US)
BAKER BRIAN A (US)
SMITH GAYLORD D (US)
BAKER BRIAN A (US)
International Classes:
C22C19/05; (IPC1-7): C22C19/05
Foreign References:
| US4110110A | 1978-08-29 | |||
| US4631169A | 1986-12-23 | |||
| US4844864A | 1989-07-04 | |||
| US4871512A | 1989-10-03 | |||
| US5017249A | 1991-05-21 | |||
| JPS6070155A | 1985-04-20 |
Other References:
See also references of EP 1466027A4
Download PDF: