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Title:
PROCESS FOR MANUFACTURING Al ALLOY CONTAINING LITTLE Ca, AND BASE METAL FOR MANUFACTURING Al ALLOY CONTAINING LITTLE Ca
Document Type and Number:
Japanese Patent JP2004307985
Kind Code:
A
Abstract:

To provide a process for manufacturing an Al alloy containing little Ca, which inexpensively and reliably reduces Ca, and to provide an Al alloy base metal applicable to the manufacturing process.

The process manufactures the Al alloy containing as little Ca as 0.002 mass% or less. The process comprises a base-metal-melting step S1 for melting a base metal of an Al alloy which contains 0.003 mass% or more Ca together with 1 mass% or less Mg, a molten-metal-holding step S2 for reducing a Ca content to 0.002 mass% or less by exposing the surface of the molten metal obtained in the base-metal-melting step S1 to atmospheric air for 20 minutes or longer, and a pouring step S3 of pouring the molten metal into a mold having a desired shape. The base metal of the Al alloy to be used preferably contains 0.2 mass% or less Mg. After the molten-metal-holding step S2, a Mg addition step of adding a desired amount of Mg to the molten metal is preferably performed.


Inventors:
IKUNO HAJIME
HOJO HIROSHI
SUGIMOTO YOSHIHIKO
UEDA ISAMU
IWABORI HIROAKI
Application Number:
JP2003106922A
Publication Date:
November 04, 2004
Filing Date:
April 10, 2003
Export Citation:
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Assignee:
TOYOTA CENTRAL RES & DEV
International Classes:
B22D1/00; B22D21/04; C22B9/10; C22B21/06; C22C1/02; C22C21/02; (IPC1-7): C22B21/06; B22D1/00; B22D21/04; C22B9/10; C22C1/02
Attorney, Agent or Firm:
Yoshiyasu Takahashi
Tamiwa Iwakura