US2025129454A1PendingUtilityA1
High-strength, high-formability titanium alloy using molybdenum and ferrochrome and method for manufacturing same
Assignee: KOREA INSTITUTE MATERIALS SCIENCEPriority: Dec 29, 2021Filed: Dec 6, 2022Published: Apr 24, 2025
Est. expiryDec 29, 2041(~15.5 yrs left)· nominal 20-yr term from priority
C22F 1/183C22C 14/00C22C 1/02C22F 1/18
57
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
Disclosed are a high-strength, high-formability titanium alloy using molybdenum and ferrochrome and a manufacturing method therefor. In the titanium alloy manufacturing method according to the present invention, a titanium alloy base material is formed by adding ferrochrome including Cr, Fe, Si and C to an alloy or mixture of Ti and Mo, dissolving and cooling same to form a titanium alloy base material, and then hot molding the formed titanium alloy base material. At this time, addition is made of Mo in an amount of 1 to 15 wt % and ferrochrome in an amount of less than 4 wt %.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A titanium alloy comprising:
molybdenum (Mo): 1.0 to 15.0% by weight, chromium (Cr): 0.1 to 1.98% by weight, iron (Fe): 0.1 to 0.93% by weight, silicon (Si): 0.01 to 0.09% by weight, and oxygen (O): equal to or smaller than 0.4% by weight, wherein the content of chromium (Cr) is greater than the content of iron (Fe), wherein the titanium alloy also includes a remainder composed of titanium (Ti) and inevitable impurities, wherein the titanium alloy has a tensile strength in a range of 1109 to 1510 MPa.
2 . The titanium alloy of claim 1 , wherein the content of chromium is 1.7 to 4 times the content of iron.
3 . The titanium alloy of claim 1 , wherein the titanium alloy has a molybdenum equivalent ([Mo]eq.), expressed in Equation 1 below, in a range of 5.5 to 20 and has a beta transformation point in a range of 670 to 815° C.
[
Mo
]
eq
.
=
[
Mo
]
+
0.2
[
T
a
]
+
0
.
2
8
[
N
b
]
+
0
.
4
[
W
]
+
0
.
6
7
[
V
]
+
1
.
2
5
[
C
r
]
+
1
.
2
5
[
N
i
]
+
1.
7
[
M
n
]
+
1
.
7
[
C
o
]
+
2
.
5
[
F
e
]
[
Equation
1
]
4 . The titanium alloy of claim 1 , wherein the titanium alloy has a yield strength in a range of 545 to 1420 MPa and a Young's modulus in a range of 80 to 110 GPa.
5 . A method for preparing a titanium alloy, the method comprising:
(a) adding ferrochrome including chromium (Cr), iron (Fe), silicon (Si), and carbon (C) to an alloy or a mixture of titanium (Ti) and molybdenum; (b) melting a result of the (a) and then cooling the result to form a titanium alloy base material; and (c) hot forming the titanium alloy base material, wherein the ferrochrome includes iron (Fe): 20 to 35% by weight, silicon (Si): 1 to 4% by weight, and carbon (C): equal to or smaller than 0.15% by weight, with a remainder composed of chromium (Cr) and inevitable impurities, wherein molybdenum is added in an amount in a range of 1 to 15% by weight and the ferrochrome is added in an amount smaller than 4% by weight with respect to a total weight of the titanium alloy.
6 . The method of claim 5 , wherein the ferrochrome is added in an amount in a range of 0.5 to 2% by weight with respect to the total weight of the titanium alloy.
7 . The method of claim 5 , wherein the hot forming is performed in a temperature range of 800 to 850° C. with a forming ratio equal to or lower than 90%.
8 . The method of claim 5 , wherein the prepared titanium alloy includes molybdenum (Mo): 1.0 to 15.0% by weight, chromium (Cr): 0.1 to 1.98% by weight, iron (Fe): 0.1 to 0.93% by weight, silicon (Si): 0.01 to 0.09% by weight, and oxygen (O): equal to or smaller than 0.4% by weight, with a remainder composed of titanium (Ti) and inevitable impurities, wherein the titanium alloy has a tensile strength in a range of 1109 to 1510 MPa.Join the waitlist — get patent alerts
Track US2025129454A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.