US2008121320A1PendingUtilityA1
Copper alloy and producing method therefor
Est. expiryNov 29, 2022(expired)· nominal 20-yr term from priority
C22C 9/00C22F 1/08
60
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Claims
Abstract
Superior bendability in a copper alloy and further strength improvement ensures characteristics which are sufficiently superior in view of essential qualities of strength of titanium-copper. 2.0 to 4.0 mass % of Ti, 0.01 to 0.50 mass % of one or more than one kind of element from among Fe, Co, Ni, Cr, V, Zr, B, and P as the third element group are contained, and not less than 50% of the total content of these elements is made to exist as second-phase particles.
Claims
exact text as granted — not AI-modified1 . A copper alloy comprising:
2.0 to 4.0 mass % of Ti; and 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P as an additional element; and second-phase particles represented by Cu-Ti-X system particles, wherein X is selected from the group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P; wherein not less than 50% of the total content of the additional element exists as the second-phase particle.
2 . A copper alloy comprising:
2.0 to 4.0 mass % of Ti; 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P as an additional element; and second-phase particles represented by Cu-Ti-X system particles, wherein X is selected from the group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P; wherein the second-phase particles have not less than 0.01 μm 2 area observed by a cross section speculum, and the rate of the number of second-phase particles in which the content of the additional element within the second-phase particles is not less than 10 times the content of the additional element within the alloy is not less than 70% of the total number of the second-phase particles.
3 . A copper alloy comprising:
2.0 to 4.0 mass % of Ti; 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P as an additional element; and a second-phase particle represented by Cu-Ti-X system particles, wherein X is selected from the group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P; wherein the second-phase particle has not less than 0.01 μm 2 area observed by a cross section speculum, and the second-phase particle has an area percentage Af of not more than 1.0%.
4 . A copper alloy comprising:
2.0 to 4.0 mass % of Ti; 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P as an additional element; second-phase particles represented by Cu-Ti-X system particles, wherein X is selected from the group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P, and wherein the second-phase particles have not less than 0.01 μm 2 area observed by a cross section speculum; and an equable dispersion degree E defined by the following equation
E
=
1
n
∑
i
n
(
d
i
-
A
0
/
N
A
)
2
A
0
N
A
wherein d i is the distance from an i-th second-phase particle to a nearest second-phase particle, A 0 is the measured visual field area, and N A is the number of the second-phase particles confirmed within the measured visual field area, wherein the equable dispersion degree E is not more than 0.8.
5 . A copper alloy comprising:
2.0 to 4.0 mass % of Ti; 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P as an additional element; an area percentage Af of second-phase particles represented by Cu-Ti-X system particles, wherein X is selected from the group consisting of Fe, Co, Ni, Cr, V, Zr, B, and P, and wherein the second-phase particles have not less than 0.01 μm 2 area observed by a cross section speculum, and the area percentage Af is not more than 1.0%; the second-phase particles with not less than 0.01μm 2 area observed by the cross section speculum; and an equable dispersion degree E defined by the following equation
E
=
1
n
∑
i
n
(
d
i
-
A
0
/
N
A
)
2
A
0
N
A
wherein d i is the distance from an i-th second-phase particle to a nearest second-phase particle, A 0 is the measured visual field area, and N A is the number of the second-phase particles confirmed within the measured visual field area, wherein the equable dispersion degree E is not more than 0.8.
6 . The copper alloy according to claim 1 , wherein the content of the Ti is 2.5 to 3.5 mass %.
7 . A producing method for the copper alloy of claim 1 comprising the steps of:
producing an ingot in which 0.01 to 0.50 mass % of at least one element selected from Fe, Co, Ni, Cr, V, Zr, B, and P is added to Cu, and 2.0 to 4.0 mass % of Ti is added; solution treating for heating the ingot up to ultimate temperature T° C., the ingot heated to temperature exceeding 600° C. at a heating rate of not less than 20° C./sec, and the ingot is then held for not less than 10 sec within a temperature range of T−100° C. to T° C., resulting in a supersaturated solid solution; cold rolling by applying cold rolling with 5 to 50% of degree of processing from conditions of the supersaturated solid solution; and aging treating for applying a thermal treatment to the rolled material at 350 to 450° C.Join the waitlist — get patent alerts
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