EP 0387976 A3 19901107 - NEW SUPERALLOYS AND THE METHODS FOR IMPROVING THE PROPERTIES OF SUPERALLOYS
Title (en)
NEW SUPERALLOYS AND THE METHODS FOR IMPROVING THE PROPERTIES OF SUPERALLOYS
Publication
Application
Priority
CN 89105034 A 19890315
Abstract (en)
[origin: EP0387976A2] This invention has provided a new technique of improving the properties of superalloys by reducing the segregation of the alloying elements. The characteristic specificity is to reduce the phosphorus content of the alloys to below 0.001 (in wt%) and, in case of Ni-base superalloys, to below 0.0005(wt%). It is needed to eliminate Zr from the superalloys. Meanwhile, it is also needed to control the proper content of B and to reduce the content of Si to below 0.005. The invention has also provided a series of low segregation superalloys.
IPC 1-7
IPC 8 full level
C22C 19/03 (2006.01); C22C 19/05 (2006.01)
CPC (source: EP)
C22C 19/03 (2013.01); C22C 19/055 (2013.01); C22C 19/056 (2013.01); C22C 19/057 (2013.01)
Citation (search report)
- US 3385698 A 19680528 - MACFARLANE RICHARD R, et al
- GB 2106138 A 19830407 - ROLLS ROYCE [GB]
- EP 0045563 A1 19820210 - SECR DEFENCE BRIT [GB]
- EP 0214080 A2 19870311 - UNITED TECHNOLOGIES CORP [US]
- US 3667938 A 19720606 - BOESCH WILLIAM J
- GB 2075057 A 19811111 - ROLLS ROYCE
- EP 0194391 A1 19860917 - GEN ELECTRIC [US]
- EP 0237378 A1 19870916 - SNECMA [FR], et al
- G.W. MEETHAM: "Development of Gas Turbine Materials", 1981, Applied Science Publishers Ltd., London, GB, pages 93, 296-298, page 93, second paragraph; page 297, Alloy C1023.
- Metal Progress, Vol. 129, No. 4, March 1986, pages 39-42, Metals Park, Ohio, US; Y. MINGGAO et al.: "Overview: investment casting alloys for aircraft parts".
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0387976 A2 19900919; EP 0387976 A3 19901107; CN 1045607 A 19900926
DOCDB simple family (application)
EP 90250070 A 19900314; CN 89105034 A 19890315