Titanium sheet and method for producing the same

Patent metadata

Field	Value
Publication number	US-10480050-B2
Application number	US-201615553635-A
Country	US
Kind code	B2
Filing date	Mar 1, 2016
Priority date	Mar 2, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A titanium sheet has a chemical composition containing, in mass %, Cu: 0.1 to 1.0%, Ni: 0.01 to 0.20%, Fe: 0.01 to 0.10%, O: 0.01 to 0.10%, Cr: 0 to 0.20%, the balance: Ti and unavoidable impurities, and satisfying 0.04≤0.3Cu+Ni≤0.44%. The average grain size of α phase is 15 μm or larger, and an intermetallic compound of Cu and/or Ni, and Ti is at 2.0 volume % or less. This titanium sheet has excellent workability and high strength.

First claim

The invention claimed is:

1. A titanium sheet having a chemical composition containing, in mass %:
Cu: 0.1 to 1.0%;
Ni: 0.10 to 0.20%;
Fe: 0.01 to 0.10%;
0: 0.01 to 0.10%;
Cr: 0 to 0.20%; and
the balance: Ti and unavoidable impurities, and
satisfying 0.04≤0.3Cu+Ni≤0.44%, wherein
an average grain size of a phase is 15 μm or larger, and
an intermetallic compound of Cu and/or Ni, and Ti is at 2.0 volume % or less.

2. The titanium sheet according to claim 1 , wherein an elongation [%] is 42% or higher, and a following formula (1) is satisfied:
(Elongation) [%]≥−0.12×(0.2% yield stress) [MPa]+73  (1),

3. The titanium sheet according to claim 1 , wherein the chemical composition contains, in mass %,
Cr: 0.01 to 0.20%.

4. The titanium sheet according to claim 2 , wherein the chemical composition contains, in mass %,
Cr: 0.01 to 0.20%.

Assignees

• Nippon Steel & Sumitomo Metal Corp
• Nippon Steel Corp

Inventors

• Takebe Hidenori
• Shirai Yoshihisa

Classifications

• C22F1/183

  of titanium or alloys based thereon · CPC title

• C22F1/00

  Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• C22F1/18

  High-melting or refractory metals or alloys based thereon · CPC title

• B21B3/00

  Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences {; Rolling of aluminium, copper, zinc or other non-ferrous metals}(altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C21D, C22F) · CPC title

• C22C14/00 Primary

  Alloys based on titanium · CPC title