# US 10,119,179 B2 · Titanium plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,179 B2 - Document ID: US10119179B2 - Status: Granted - Kind: B2 - Application number: 14/916,501 - Filed: 2014-09-19 - Published: 2016-07-21 - Granted: 2018-11-06 - Earliest claimed: 2013-09-24 - Assignees: Kobe Steel, Ltd. - Applicants: Kobe Steel, Ltd. - Inventors: Katsushi Matsumoto; Yoshinori Ito - Web page: https://patentgrep.com/patent/US10119179B2 ## CPC - C22C 14/00: Alloys based on titanium - C22F 1/183: {of titanium or alloys based thereon} - C22C: ALLOYS (treatment of alloys C21D, C22F) - 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) ## Abstract A titanium plate according to the present invention contains a predetermined amount of Fe and O with the remainder consisting of titanium and inevitable impurities, and has a grain microstructure of the α-phase having a HCP structure. In the titanium plate, the total area in which α-phase grains specified by a first angle (θ) are included is a predetermined value of a ratio (P) or (R) and the total area in which α-phase grains specified by a second angle (φ) are included is a predetermined value of an area ratio (Q) or (S) in a (0001) pole figure of α-phase grains, and the average value and the maximum value of an equivalent circle diameter in the α-phase grains are respectively predetermined values. ## Claims ### Claim 1 A titanium plate, comprising: Fe: from 0.020 to 1.000 mass %; O: from 0.020 to 0.400 mass %; titanium; and inevitable impurities, and including a grain microstructure of α phase that has a HCP structure, wherein: a total area of α phase grains included in a first angle range (X1) where a first angle (θ) between a no al direction of the (0001) plane and a ND direction that is a normal direction of a rolling plane in an (0001) pole figure of an α phase grain is from 0° to 50° is 0.40 or more in terms of a ratio (P) relative to the total area of entire α phase grains; an area ratio (Q) expressed by (A)/(B) is from 0.20 to 5.00 with (A) being a total area of α phase grains included in a range where a second angle (φ) between a plane including the normal direction and the ND direction and a plane including the ND direction and a RD direction that is the rolling direction is from 0° to 45° in the first angle range (X1) and with (B) being a total area of α phase grains included in a range where the second angle (φ) is over 45° and 90° or less; the total area of α phase grains included in a second angle range (X2) where the first angle (θ) is from 80° to 90° is 0.15 or more in terms of a ratio (R) relative to the total area of entire α phase grains; an area ratio (S) expressed by (C)/(D) is from 0.20 to 5.00 with (C) being a total area of α phase grains included in a range where the second angle (φ) is from 0° to 45° in the second angle range (X2) and with (D) being a total area of α phase grains included in a range where the second angle (φ) is over 45° and 90° or less; and an average value of an equivalent circle diameter in the α phase grains is from 5 to 100 μm, and a maximum value of the equivalent circle diameter is 200 μm or less. ### Claim 2 (depends on 1) The titanium plate according to claim 1, further comprising: N: 0.050 mass % or less; C: 0.100 mass % or less; and Al: 000 mass % or less. ### Claim 3 (depends on 1) The titanium plate according to claim 1 consisting of said Fe, O, titanium, and inevitable impurities. ### Claim 4 (depends on 1) The titanium plate according to claim 1, consisting of said Fe, O, N, C, Al, titanium, and inevitable impurities. ### Claim 5 (depends on 1) The titanium plate according to claim 1, wherein: the total area of α phase grains included in the first angle range (X1) is 0.80 or less in terms of the ratio (P) relative to the total area of entire α phase grains; and the total area of α phase grains included in the second angle range (X2) where the first angle (θ) is from 80° to 90° is 0.50 or less in terms of the ratio (R) relative to the total area of entire α phase grains. ### Claim 6 (depends on 1) The titanium plate according to claim 1, wherein: the total area of α phase grains included in the first angle range (X1) is 0.50-0.75 in terms of the ratio (P) relative to the total area of entire α phase grains; and the total area of α phase grains included in the second angle range (X2) where the first angle (θ) is from 80° to 90° is 0.45 or less in terms of the ratio (R) relative to the total area of entire α phase grains. ### Claim 7 (depends on 2) The titanium plate according to claim 2, wherein: the total area of α phase grains included in the first angle range (X1) is 0.80 or less in terms of the ratio (P) relative to the total area of entire α phase grains; and the total area of α phase grains included in the second angle range (X2) where the first angle (θ) is from 80° to 90° is 0.50 or less in terms of the ratio (R) relative to the total area of entire α phase grains. ### Claim 8 (depends on 2) The titanium plate according to claim 2, wherein: the total area of α phase grains included in the first angle range (X1) is 0.50-0.75 in terms of the ratio (P) relative to the total area of entire α phase grains; and the total area of α phase grains included in the second angle range (X2) where the first angle (θ) is from 80° to 90° is 0.45 or less in terms of the ratio (R) relative to the total area of entire α phase grains. ### Claim 9 (depends on 1) The titanium plate according to claim 1, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 200μm or less. ### Claim 10 (depends on 1) The titanium plate according to claim 1, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 150 μm or less. ### Claim 11 (depends on 2) The titanium plate according to claim 2, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 200 μm or less. ### Claim 12 (depends on 2) The titanium plate according to claim 2, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 150 μm or less. ### Claim 13 (depends on 5) The titanium plate according to claim 5, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 200 μm or less. ### Claim 14 (depends on 5) The titanium plate according to claim 5, wherein the average value of the equivalent circle diameter in the α phase grains is from 5 to 80 μm, and the maximum value of the equivalent circle diameter is 150 μm or less. ### Claim 15 (depends on 5) The titanium plate according to claim 5, comprising: Fe: from 0.025 to 0.250 mass %; and O: from 0.025 to 0.150 mass %. ### Claim 16 (depends on 15) The titanium plate according to claim 15, wherein the titanium plate further comprises: N: 0.014 mass % or less; C: 0.050 mass % or less; and Al: 0.400 mass % or less.