Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A method of manufacturing a rolled titanium alloy sheet which comprises breaking down an α or α+β titanium alloy ingot into a slab, working the slab in sequential stages of (A) cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.2 and a cross rolling ratio of 0.6 to 1.4, (B) annealing the slab for recrystallization at a temperature 20° to 100° C. below the β-transus of the alloy, and (C) further cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.6 and a cross rolling ratio of 0.6 to 1.4.
Claim 2
Independent Claim
109 words
A method of manufacturing a rolled titanium alloy sheet which comprises breaking down an α or α+β titanium alloy ingot into a slab, working the slab in sequential stages of (A) cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.2 and a cross rolling ratio of 0.6 to 1.4, (B) annealing the slab for recrystallization at a temperature 20° to 100° C. below the β-transus of the alloy, and (C) further cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.6 and a cross rolling ratio of 0.6 to 1.4.
Claim 3
Dependent Claim
17 words
A method according to claim 1 further comprising repeating stages (B) and (C) at least one each.
Claim 4
Independent Claim
130 words
A method of manufacturing a rolled titanium alloy sheet which comprises breaking down an α or α+β titanium alloy ingot by forging or rolling at a temperature of the two-phase α+β region under a total draft of at least 30% to form a slab, working the slab in sequential stages of (A) cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.2 and a cross rolling ratio of 0.6 to 1.4, (B) annealing the slab for recrystallization at a temperature 20° to 100° C. below the β-transus of the alloy, and (C) further cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.6 and a cross rolling ratio of 0.6 to 1.4.
Claim 5
Independent Claim
130 words
A method of manufacturing a rolled titanium alloy sheet which comprises breaking down an α or α+β titanium alloy ingot by forging or rolling at a temperature of the two-phase α+β region under a total draft of at least 30% to form a slab, working the slab in sequential stages of (A) cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.2 and a cross rolling ratio of 0.6 to 1.4, (B) annealing the slab for recrystallization at a temperature 20° to 100° C. below the β-transus of the alloy, and (C) further cross rolling the slab in the α+β region under a condition of a reduction ratio of at least 1.6 and a cross rolling ratio of 0.6 to 1.4.
Claim 6
Dependent Claim
17 words
A method according to claim 3 further comprising repeating stages (B) and (C) at least once each.
Claim 7
Independent Claim
38 words
A method according to any of claims 1, 2, 3 or 4 wherein the recrystallization annealing in stage (B) that follows stage (A) is performed at a temperature 20° to 70° C. below the β-transus of the alloy.
Claim 8
Independent Claim
43 words
A method according to any of claims 1, 2, 3, or 4 wherein the slab is heated to a temperature of the α+β region, prior to stage (A), in an atmosphere where the partial pressure of oxygen is no greater than 0.02 atm.
Claim 9
Dependent Claim
37 words
A method according to claim 5 wherein the slab is heated to a temperature of the α+β region, prior to stage (A), in an atmosphere where the partial pressure of oxygen is no greater than 0.02 atm.
Claim 10
Dependent Claim
18 words
A method according to claim 1 or 3 wherein the rolled slab is heat treated after stage (C).
Claim 11
Dependent Claim
18 words
A method according to claim 2 or 4 wherein the rolled slab is heat treated after stage (D).