EP0248338A1
Expired / Lapsed
EP
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Highly pure titanium and process for producing the same
Assignee: Toshiba Corp
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Filing: 1987-05-26
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Granted: —
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Expires: 2007-05-26
Abstract
Abstract Disclosed is a highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium. Disclosed is also a process for preparing the above highly pure titanium which comprises melting a crude titanium obtained by molten salt electrolysis, in a high vacuum of 5 x 10⁻⁵ mbar or less.
Inventors
- 👤 Kazumi Shimotori
- 👤 Yoshiharu Ochi
- 👤 Hideo Ishihara
- 👤 Takenori Umeki
- 👤 Takashi Ishigami
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/129; C22B34/1295; C22B9/00; C22B9/16; C22B9/22; C22B9/228; C22C14/00; H; H10; H10W; H10W20/00; H10W20/01; H10W20/031; H10W20/032; H10W20/40; H10W20/41; H10W20/44; H10W20/4403; H10W20/4437; H10W20/4441
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium.
Claim 2
Dependent Claim
42 words
A highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium.
Claim 3
Dependent Claim
24 words
The highly pure titanium according to Claim 1, wherein said highly pure titanium contains not more than 0.001 ppm each of uranium and thorium.
Claim 4
Dependent Claim
22 words
The highly pure titanium according to Claim 1, wherein said highly pure titanium has residual resistance ratio RRR₂₇₃ of 45 or more.
Claim 5
Dependent Claim
66 words
A process for producing a highly pure titanium containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium, which comprises melting a crude titanium obtained by molten salt electrolysis, in a high vacuum of 5 x 10⁻⁵ mbar or less.
Claim 6
Dependent Claim
66 words
A process for producing a highly pure titanium containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium, which comprises melting a crude titanium obtained by molten salt electrolysis, in a high vacuum of 5 x 10⁻⁵ mbar or less.
Claim 7
Dependent Claim
23 words
The process for producing a highly pure titanium according to Claim 4, wherein the melting is carried out according to electron beam melting.
Claim 8
Dependent Claim
34 words
The process for producing a highly pure titanium according to Claim 4, wherein, before melting, the starting titanium is subjected to degassing in a vacuum of 1.3 x 10⁻⁴ mbar at 1000°C or more.
Claim 9
Dependent Claim
20 words
The process for producing a highly pure titanium according to Claim 4, wherein said crude titanium is an acicular titanium.
Claim 10
Dependent Claim
35 words
The process for producing a highly pure titanium according to Claim 5, wherein an acicular titanium is obtained by molten salt electrolysis, and said acicular titanium is subjected to electron beam melting as it is.
References Cited (Backward Citations)
US2878008A
Cited
US3406056A
Cited
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