US2010230017A1PendingUtilityA1

Ultra-High Strength, Corrosion Resistant Wire, a Method of Making Same, and a Method of Using Same

Individually held — no corporate assignee on recordPriority: Mar 12, 2009Filed: Mar 11, 2010Published: Sep 16, 2010

Est. expiryMar 12, 2029(~2.6 yrs left)· nominal 20-yr term from priority

Inventors:Richard B. Frank Lyndon W. Burleson

C22C 19/055C22C 19/07H05K 9/0098C22F 1/10C22C 19/056Y10T428/2925B32B 15/02C22C 30/00

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References

Claims

Abstract

A method of making steel wire is described that includes the step of forming a length of wire from a high strength, corrosion resistant alloy. The alloy preferably has the following composition in weight percent. Carbon 0.03 max. Manganese 0.15 max. Silicon 0.15 max. Phosphorus 0.015 max. Sulfur 0.010 max. Chromium 19.00-21.00 Nickel 33.00-37.00 Molybdenum 9.00-10.50 Titanium 1.00 max. Boron 0.010 max. Iron 1.00 max. The balance of the alloy is cobalt and usual impurities. The wire is annealed at a combination of temperature and time effective to provide a grain size of about ASTM 6 or finer. The annealed wire is then drawn such that the cross-sectional area of the wire is reduced by about 50 to 80%. The as-drawn wire is then heat treated at a second combination of temperature and time effective to provide the wire with high strength and sufficient ductility that when the wire is wrapped to provide a coil having an inside diameter substantially commensurate with the diameter of the wire and then unwrapped it does not crack or break.

Claims

exact text as granted — not AI-modified

1 . A method of making wire comprising the steps of:
forming a length of wire from an alloy comprising, in weight percent, about

Carbon
0.03
max.

Manganese
0.15
max.

Silicon
0.15
max.

Phosphorus
0.015
max.

Sulfur
0.010
max.

Chromium
19.00-21.00

Nickel
33.00-37.00

Molybdenum
9.00-10.50

Titanium
1.00
max.

Boron
0.010
max.

Iron
1.00
max.

the balance being cobalt and the usual impurities;
annealing said wire at a combination of temperature and time effective to provide a grain size of about ASTM 6 or finer;
drawing the annealed wire such that the cross-sectional area of the wire is reduced by about 50 to 80%; and then
hardening said alloy by heating the wire at a second combination of temperature and time effective to provide said alloy with a room temperature tensile strength of at least 300 ksi and sufficient ductility that when said wire is wrapped to provide a coil having an inside diameter substantially equal to the diameter of said wire and then unwrapped, said wire does not crack or break.

2 . The method as claimed in claim 1 wherein the annealing step comprises the step of heating said wire at a temperature of about 1750 to 1850° F. for about 0.5 to 2 hours.

3 . The method as claimed in claim 1 wherein the hardening step comprises heating the wire at a temperature of about 1250° F. to about 1325° F. for up to about 4 hours.

4 . The method as claimed in claim 1 wherein the step of drawing the wire is performed such that the cross-sectional area of the wire is reduced by at least about 64%.

5 . The method as claimed in claim 4 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more than about 78%.

6 . The method as claimed in claim 5 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more than about 73%.

7 . The method as claimed in claim 1 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by at least about 67%.

8 . The method as claimed in claim 1 wherein the hardening step comprises heating the wire at not more than about 1300° F.

9 . The method as claimed in claim 1 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 64 to 78%; and the hardening step comprises heating the drawn wire at a temperature of about 1250-1300° F.

10 . The method as claimed in claim 9 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by at least about 67%.

11 . The method as claimed in claim 1 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 64 to 73%; and the hardening step comprises heating the drawn wire at a temperature of about 1250-1325° F.

12 . The method as claimed in claim 11 wherein the hardening step comprises heating the wire at a temperature not greater than about 1300° F.

13 . The method as claimed in claim 12 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more then about 68%.

14 . The method as claimed in claim 1 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67 to 78%; and the hardening step comprises heating the drawn wire at a temperature of about 1275-1300° F.

15 . The method as claimed in claim 14 wherein the hardening step comprises heating the drawn wire at a temperature of about 1300° F.

16 . The method as claimed in claim 1 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67 to 68%; and the hardening step comprises heating the drawn wire at a temperature of about 1275° F.

17 . The method as claimed in claim 1 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67%; and the hardening step comprises heating the drawn wire at a temperature of about 1250° F.

18 . A method of making flexible armored cable comprising the steps of:
forming a length of wire from an alloy comprising, in weight percent, about

Carbon
0.03
max.

Manganese
0.15
max.

Silicon
0.15
max.

Phosphorus
0.015
max.

Sulfur
0.010
max.

Chromium
19.00-21.00

Nickel
33.00-37.00

Molybdenum
9.00-10.50

Titanium
1.00
max.

Boron
0.010
max.

Iron
1.00
max.

19 . The method as claimed in claim 18 wherein the annealing step comprises the step of heating said wire at a temperature of about 1750 to 1850° F. for about 0.5 to 2 hours.

20 . The method as claimed in claim 18 wherein the hardening step comprises heating the wire at a temperature of about 1250° F. to about 1325° F. for up to about 4 hours.

21 . The method as claimed in claim 18 wherein the step of drawing the wire is performed such that the cross-sectional area of the wire is reduced by at least about 64%.

22 . The method as claimed in claim 21 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more than about 78%.

23 . The method as claimed in claim 22 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more than about 73%.

24 . The method as claimed in claim 18 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by at least about 67%.

25 . The method as claimed in claim 18 wherein the hardening step comprises heating the wire at not more than about 1300° F.

26 . The method as claimed in claim 18 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 64 to 78%; and the hardening step comprises heating the drawn wire at a temperature of about 1250-1300° F.

27 . The method as claimed in claim 26 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by at least about 67%.

28 . The method as claimed in claim 18 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 64 to 73%; and the hardening step comprises heating the drawn wire at a temperature of about 1250-1325° F.

29 . The method as claimed in claim 28 wherein the hardening step comprises heating the wire at a temperature not greater than about 1300° F.

30 . The method as claimed in claim 29 wherein the drawing step is performed such that the cross-sectional area of the wire is reduced by not more then about 68%.

31 . The method as claimed in claim 18 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67 to 78%; and the hardening step comprises heating the drawn wire at a temperature of about 1275-1300° F.

32 . The method as claimed in claim 31 wherein the hardening step comprises heating the drawn wire at a temperature of about 1300° F.

33 . The method as claimed in claim 18 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67 to 68%; and the hardening step comprises heating the drawn wire at a temperature of about 1275° F.

34 . The method as claimed in claim 18 wherein:
the drawing step is performed such that the cross-sectional area of the wire is reduced by about 67%; and the hardening step comprises heating the drawn wire at a temperature of about 1250° F.

35 . A wire article comprising wire formed from a high strength, corrosion resistant alloy having the following composition in weight percent, about

Carbon
0.03
max.

Manganese
0.15
max.

Silicon
0.15
max.

Phosphorus
0.015
max.

Sulfur
0.010
max.

Chromium
19.00-21.00

Nickel
33.00-37.00

Molybdenum
9.00-10.50

Titanium
1.00
max.

Boron
0.010
max.

Iron
1.00
max.

Wherein the balance of the alloy is cobalt and the usual impurities and the wire is characterized by a tensile strength in excess of 300 ksi and sufficient ductility that when the wire is wrapped to provide a coil having an inside diameter substantially equal to the diameter of the wire and then unwrapped, the wire does not crack or break.

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