Title:
Fe-Ni-BASED SUPERALLOY AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2014224310
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an Fe-Ni-based superalloy having improved creep rupture life and good strength and ductility, and to provide a method for producing the same.SOLUTION: The method for producing the Fe-Ni-based superalloy includes subjecting a raw material for hot forging, which has a composition comprising, by mass, 0.08% or less of C, 0.35% or less of Si, 0.35% or less of Mn, 0.015% or less of P, 0.015% or less of S, 50.0-55.0% of Ni, 17.0-21.0% of Cr, 2.8-3.3% of Mo, 0.30% or less of Cu, 0.20-0.80% of Al, 0.65-1.15% of Ti, 4.75-5.50% of Nb+Ta, 0.006% or less of B, and the balance comprising Fe and inevitable impurities, to hot forging and solid solution heat treatment in a temperature range satisfying the relation of 1960°C≤hot forging temperature + solid solution heat treatment temperature (provided that the solid solution heat treatment temperature is 930-990°C)≤2020°C, then after keeping at 700-750°C for 2-20 h, cooling to 600-650°C, and performing aging treatment for keeping at 600-650°C for 2-20 h.
More Like This:
Inventors:
AOKI CHUYA
Application Number:
JP2014071417A
Publication Date:
December 04, 2014
Filing Date:
March 31, 2014
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
C22F1/10; C22C19/05
Domestic Patent References:
| JP2011255409A | 2011-12-22 | |||
| JP2012517524A | 2012-08-02 | |||
| JPH0364435A | 1991-03-19 | |||
| JPH0261018A | 1990-03-01 | |||
| JP2004091816A | 2004-03-25 |
Foreign References:
| US5087305A | 1992-02-11 |
Previous Patent: REFINING METHOD FOR CONVERTER
Next Patent: HOT-DIP GALVANNEALED STEEL SHEET FOR HOT STAMP
Next Patent: HOT-DIP GALVANNEALED STEEL SHEET FOR HOT STAMP