Title:
PROCESS FOR MANUFACTURING MARAGING STEEL AND METHOD FOR REFINING INCLUSIONS
Document Type and Number:
WIPO Patent Application WO/2014/156942
Kind Code:
A1
Abstract:
Provided are: a process for manufacturing a maraging steel, said process being capable of further refining Ti-based inclusions and minimizing the size difference of Ti-based inclusions among the locations within a steel ingot; and a method for refining inclusions. The present invention pertains to a process for manufacturing a maraging steel by a vacuum arc remelting method using a vacuum arc remelting apparatus. The process includes, as an essential step, a steel ingot production step for melting a consumable electrode consisting of a maraging steel in a mold of the apparatus and thus producing a steel ingot, said steel ingot production step including a cooling step for cooling the steel ingot with a rare gas introduced between the steel ingot and the mold.
Inventors:
HADANO YUUICHI (JP)
KAMIMURA TAKAHIKO (JP)
KAMIMURA TAKAHIKO (JP)
Application Number:
PCT/JP2014/057728
Publication Date:
October 02, 2014
Filing Date:
March 20, 2014
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C22B9/20; B22D27/02; B22D27/04; C21C7/04; C22C38/00; C22C38/14
Foreign References:
| JP2005232551A | 2005-09-02 | |||
| JP2004090022A | 2004-03-25 | |||
| US3353585A | 1967-11-21 | |||
| DE10208903A1 | 2003-09-18 | |||
| JPH0929420A | 1997-02-04 | |||
| JP2004183097A | 2004-07-02 | |||
| JP2001214212A | 2001-08-07 | |||
| JP4692282B2 | 2011-06-01 |
Other References:
See also references of EP 2980233A4
Attorney, Agent or Firm:
OKUYAMA, Shoichi et al. (JP)
Okuyama In addition, it is 1. (JP)
Okuyama In addition, it is 1. (JP)
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