Titanium sheet and method for producing the same
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.
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%.