EP 0972093 A1 20000119 - APPARATUS FOR PRODUCING CASTINGS WITH DIRECTIONAL AND SINGLE CRYSTAL STRUCTURE
Title (en)
APPARATUS FOR PRODUCING CASTINGS WITH DIRECTIONAL AND SINGLE CRYSTAL STRUCTURE
Title (de)
VORRICHTUNG ZUR HERSTELLUNG VON GUSSSTÜCKEN MIT GERICHTETER EINKRISTALLSTRUKTUR
Title (fr)
APPAREIL PERMETTANT DE PRODUIRE DES MOULAGES PRESENTANT UNE STRUCTURE DIRECTIONNELLE ET MONOCRISTALLINE
Publication
Application
Priority
- RU 97115508 A 19970912
- US 9819020 W 19980914
Abstract (en)
[origin: WO9913137A1] The present invention relates to metal casting and can be used in producing large sized blades with directional and single crystal structure having large horizontal shoulders. The apparatus comprises a vacuum chamber inside which there is positioned a mold preheating furnace (4) with a ceramic mold (1) and a vertical shield (2) disposed therein, and a crystallizer (7). The shield (2) is positioned concentrically to the casting vertical axis and is fixed on the mold upper portion or on a hanger. The shield (2) can be made integral or as a row of members having projecting flanges which telescopically insert into each other. The shield (2) is made of a graphitized foil or a carbon/carbon based composite material. The disclosed apparatus allows to decrease the role of the radial component of the thermal gradient in the process of directional solidification of the blades having large horizontal shoulders, to increase the degree of structural perfection along the complete height of a casting and to avoid porosity in the transition portion between a shroud and an airfoil.
IPC 1-7
IPC 8 full level
B22D 27/04 (2006.01); C30B 11/00 (2006.01)
CPC (source: EP)
C30B 11/003 (2013.01)
Citation (search report)
See references of WO 9913137A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9913137 A1 19990318; EP 0972093 A1 20000119; RU 2116867 C1 19980810
DOCDB simple family (application)
US 9819020 W 19980914; EP 98946046 A 19980914; RU 97115508 A 19970912