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Title:
METHOD FOR PURIFYING TITANIUM MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/088007
Kind Code:
A1
Abstract:
This method for purifying a titanium material is a deoxidization method for removing oxygen contained in a titanium material from the titanium material that is formed from pure titanium, a titanium alloy or an intermetallic compound that contains titanium as one of the main components. This method for purifying a titanium material comprises: a first melting step wherein hydrogen is introduced into the titanium material in a molten state by melting the titanium material in a rare gas atmosphere containing 5-70% by volume of hydrogen; and a second melting step wherein oxygen contained in the titanium material is removed together with hydrogen from the titanium material in a molten state by melting the titanium material, into which hydrogen has been introduced during the first melting step, in a rare gas atmosphere. The first melting step and the second melting step are carried out one or more times, respectively.

Inventors:
MATSUWAKA Daisuke
NARUSHIMA Takayuki
UEDA Kyosuke
Application Number:
JP2018/040049
Publication Date:
May 09, 2019
Filing Date:
October 29, 2018
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) (2-4 Wakinohama-Kaigandori 2-chome, Chuo-ku Kobe-sh, Hyogo 85, 〒6518585, JP)
International Classes:
C22B34/12; C22B7/00; C22B9/04; C22B9/05
Foreign References:
KR101435481B12014-08-28
CN102517464A2012-06-27
US20160177418A12016-06-23
KR20130010742A2013-01-29
US20090107290A12009-04-30
Other References:
SU , YANQING ET AL.: "Deoxidation of Titanium alloy using hydrogen", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol. 34, no. 21, November 2009 (2009-11-01), pages 8958 - 8963, XP026698214, ISSN: 0360-3199
OH, JUNG-MIN ET AL.: "Brief review of removal effect of hydrogen-plasma arc melting on refining of pure titanium and titanium alloys", INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol. 41, no. 48, 28 December 2016 (2016-12-28), pages 23033 - 23041, XP029844337, ISSN: 0360-3199
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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