# US 10,480,050 B2 · Titanium sheet and method for producing the same

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- Number: US 10,480,050 B2
- Document ID: US10480050B2
- Status: Granted
- Kind: B2
- Application number: 15/553,635
- Filed: 2016-03-01
- Published: 2018-08-30
- Granted: 2019-11-19
- Earliest claimed: 2015-03-02
- Assignees: Nippon Steel Corporation
- Applicants: Nippon Steel & Sumitomo Metal Corporation
- Inventors: Hidenori Takebe; Yoshihisa Shirai
- Web page: https://patentgrep.com/patent/US10480050B2

## CPC

- C22C 14/00: Alloys based on titanium
- B21B 3/00: 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)
- C22F 1/18: High-melting or refractory metals or alloys based thereon
- C22F 1/183: {of titanium or alloys based thereon}
- C22F 1/00: 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)
- F28F 21/086: {from titanium or titanium alloys}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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),

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 2)

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