Title:
METHOD FOR PRODUCING NI-BASED SUPERALLOY PREVENTED FROM DETERIORATION OF OXIDATION RESISTANCE DUE TO SB, AND NI-BASED SUPERALLOY MEMBER PREVENTED FROM DETERIORATION OF OXIDATION RESISTANCE DUE TO SB
Document Type and Number:
WIPO Patent Application WO/2024/075560
Kind Code:
A1
Abstract:
The present invention provides a method for producing an Sb-containing Ni-based superalloy that is prevented from deterioration of the oxidation resistance by using an additive element which prevents deterioration of the oxidation resistance of an Ni-based superalloy due to an impurity element Sb. A method for producing an Ni-based superalloy according to the present invention comprises a step in which: a starting material for an Sb-containing Ni-based superalloy having a specific composition is put into a crucible and is high-frequency melted in vacuum by a high-frequency induction melting furnace, while adding Ca into the melt of the starting material for the Ni-based superalloy in such an amount that is necessary for preventing the oxidation resistance inhibitory effect of Sb; the melt is stabilized at 1560°C to 1640°C within the crucible for 10 minutes to 60 minutes in a state where the starting material for the Ni-based superalloy is completely melted; the melt is put into a mold that has been preheated to a predetermined temperature within a unidirectional solidification furnace, and the mold filled with the melt is withdrawn from the high-frequency induction melting furnace at a rate of 50 mm/h to 350 mm/h; and after unidirectionally solidifying the starting material for the Ni-based superalloy and cooling the unidirectionally solidified material to the room temperature, the cast unidirectionally solidified member is take out from the unidirectional solidification furnace.
More Like This:
Inventors:
KAWAGISHI KYOKO (JP)
HARADA HIROSHI (JP)
YOKOKAWA TADAHARU (JP)
TABATA CHIHIRO (JP)
MAEZAWA HIROTOSHI (JP)
UZUHASHI JUN (JP)
OHKUBO TADAKATSU (JP)
TAKATA YUJI (JP)
SUZUKI SHINSUKE (JP)
HARADA HIROSHI (JP)
YOKOKAWA TADAHARU (JP)
TABATA CHIHIRO (JP)
MAEZAWA HIROTOSHI (JP)
UZUHASHI JUN (JP)
OHKUBO TADAKATSU (JP)
TAKATA YUJI (JP)
SUZUKI SHINSUKE (JP)
Application Number:
PCT/JP2023/034641
Publication Date:
April 11, 2024
Filing Date:
September 25, 2023
Export Citation:
Assignee:
NAT INST MATERIALS SCIENCE (JP)
International Classes:
C22C1/02; B22D21/00; B22D27/04; C22C19/05; C22F1/00; C22F1/10
Attorney, Agent or Firm:
TSUZUKI Noriaki (JP)
Download PDF: