Title:
METHOD FOR CASTING NI-AL ALLOY
Document Type and Number:
Japanese Patent JP2784303
Kind Code:
B2
Abstract:
PURPOSE: To manufacture a structural material of super heat resistant alloy by gradually adding Al after introducing Ar gas into melted Ni in a vacuum and lowering the temp. after heating.
CONSTITUTION: A cast material of Ni Al alloy is manufactured. Then the nickel is charged into an ingot case for high temp. After melting the nickel by heating at a fixed temp. raising speed in the vacuum, this molten nickel is held at a fixed temp. for a fixed time. After introducing the argon gas, the aluminum is gradually added into the molten nickel. After melting the aluminum by heating at a fixed temp. raising speed, this alloy is held at fixed temp. for a fixed time. Then this alloy temp. is lowered to the room temp. at a fixed speed. As the ingot case, alumina or calcia crucible is used. By this method, isothermal heat resistant and corrosion resistant structural material can be manufactured.
Inventors:
ISHAMA SHINTARO
Application Number:
JP30241292A
Publication Date:
August 06, 1998
Filing Date:
November 12, 1992
Export Citation:
Assignee:
NIPPON GENSHIRYOKU KENKYUSHO
International Classes:
B22D7/00; B22D7/06; B22D21/00; B22D23/06; B22D27/04; (IPC1-7): B22D21/00; B22D7/00; B22D7/06; B22D23/06; B22D27/04
Domestic Patent References:
| JP5247560A | ||||
| JP4280938A |
Attorney, Agent or Firm:
Kazuo Shamoto (4 outside)