US4116727A
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Magnetical soft alloys with good mechanical properties
Assignee: TELCON Ltd
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Filing: 1977-05-03
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Granted: 1978-09-26
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Expires: 1997-05-03
Abstract
Abstract Soft magnetic alloys with good mechanical properties that are relatively insensitive to variations in processing conditions have the composition 2-8% nickel, 0.5-3% vanadium, 33-55% cobalt, balance (apart from conventional alloying ingredients and impurities) iron. Optional alloying ingredients are chromium (0-1%), manganese (0-1%), carbon (0-0.1%), silicon (0-1/2%), niobium (0-1/2%) and zirconium (0-0.3%).
Inventors
- 👤 Rodney Victor Major
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:58
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/02; C; C22; C22C; C22C19/00; C22C19/07; C22C38/00; C22C38/10; C22C38/105; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14708
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
78 words
A soft magnetic alloy which after heat-treatment at a temperature in the range of 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure having ductility and strength characteristics that are relatively insensitive to the heat-treatment temperature within said range, the alloy consisting essentially of 2-8% nickel, 0.5-3% vanadium, 33-35% cobalt, 0-1% chromium, 0-1% manganese, 0-0.1% carbon, 0-0.5% silicon, 0-0.5% niobium, 0-0.3% zirconium and the balance iron apart from alloying ingredients and incidental impurities.
Claim 2
Dependent Claim
78 words
A soft magnetic alloy which after heat-treatment at a temperature in the range of 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure having ductility and strength characteristics that are relatively insensitive to the heat-treatment temperature within said range, the alloy consisting essentially of 2-8% nickel, 0.5-3% vanadium, 33-35% cobalt, 0-1% chromium, 0-1% manganese, 0-0.1% carbon, 0-0.5% silicon, 0-0.5% niobium, 0-0.3% zirconium and the balance iron apart from alloying ingredients and incidental impurities.
Claim 3
Dependent Claim
18 words
An alloy in accordance with claim 1 comprising at least 0.02% niobium and also at least 0.07% zirconium.
Claim 4
Dependent Claim
74 words
A soft magnetic alloy which after heat-treatment at a temperature in the range of 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure having ductility and strength characteristics that are relatively insensitive to the heat-treatment temperature within said range, the alloy consisting essentially of 3-5% nickel, 0.5-2.2% vanadium, 47-50% cobalt, 0-0.7% chromium, 0-0.2% manganese, 0-0.02% carbon, 0-0.2% silicon, 0-0.2% niobium, 0-0.2% zirconium and the balance iron apart from impurities.
Claim 5
Dependent Claim
74 words
A soft magnetic alloy which after heat-treatment at a temperature in the range of 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure having ductility and strength characteristics that are relatively insensitive to the heat-treatment temperature within said range, the alloy consisting essentially of 3-5% nickel, 0.5-2.2% vanadium, 47-50% cobalt, 0-0.7% chromium, 0-0.2% manganese, 0-0.02% carbon, 0-0.2% silicon, 0-0.2% niobium, 0-0.2% zirconium and the balance iron apart from impurities.
Claim 6
Dependent Claim
98 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure exhibiting a gamma phase, an elongation in the range from about 20 to about 22%, an ultimate tensile strength in the range from about 1300 to about 1400 MN/m 2 and a yield strength in the range from about 675 to about 785 MN/m 2 , the alloy consisting essentially of substantially 4.5% nickel, 48% cobalt, 1.5% vanadium, and 46% iron and impurities.
Claim 7
Dependent Claim
98 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-750° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure exhibiting a gamma phase, an elongation in the range from about 20 to about 22%, an ultimate tensile strength in the range from about 1300 to about 1400 MN/m 2 and a yield strength in the range from about 675 to about 785 MN/m 2 , the alloy consisting essentially of substantially 4.5% nickel, 48% cobalt, 1.5% vanadium, and 46% iron and impurities.
Claim 8
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 12 to about 18%, an ultimate tensile strength in the range from about 1100 to about 1200 MN/m 2 and a yield strength in the range from about 615 to about 725 MN/m 2 , the alloy consisting essentially of substantially 2.6% nickel, 45% cobalt, 1.6% vanadium, and 50.8% iron and impurities.
Claim 9
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 12 to about 18%, an ultimate tensile strength in the range from about 1100 to about 1200 MN/m 2 and a yield strength in the range from about 615 to about 725 MN/m 2 , the alloy consisting essentially of substantially 2.6% nickel, 45% cobalt, 1.6% vanadium, and 50.8% iron and impurities.
Claim 10
Dependent Claim
81 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 1170 to about 1280 MN/m 2 and a yield strength in the range from about 800 to about 850 MN/m 2 , the alloy consisting essentially of substantially 3.5% nickel, 47% cobalt, 1.5% vanadium, and 48% iron and impurities.
Claim 11
Dependent Claim
81 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 1170 to about 1280 MN/m 2 and a yield strength in the range from about 800 to about 850 MN/m 2 , the alloy consisting essentially of substantially 3.5% nickel, 47% cobalt, 1.5% vanadium, and 48% iron and impurities.
Claim 12
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 17 to about 18%, an ultimate tensile strength in the range from about 1220 to about 1280 MN/m 2 and a yield strength in the range from about 690 to about 800 MN/m 2 , the alloy consisting essentially of substantially 5.3% nickel, 45% cobalt, 1.5% vanadium, and 47.8% iron and impurities.
Claim 13
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 17 to about 18%, an ultimate tensile strength in the range from about 1220 to about 1280 MN/m 2 and a yield strength in the range from about 690 to about 800 MN/m 2 , the alloy consisting essentially of substantially 5.3% nickel, 45% cobalt, 1.5% vanadium, and 47.8% iron and impurities.
Claim 14
Dependent Claim
96 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 21 to about 23%, an ultimate tensile strength in the range from about 1400 to about 1500 MN/m 2 and a yield strength in the range from about 800 to about 990 MN/m 2 , the alloy consisting essentially of substantially 5% nickel, 47% cobalt, 1.4% vanadium, 0.07% niobium and 46.5% iron and impurities.
Claim 15
Dependent Claim
96 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 21 to about 23%, an ultimate tensile strength in the range from about 1400 to about 1500 MN/m 2 and a yield strength in the range from about 800 to about 990 MN/m 2 , the alloy consisting essentially of substantially 5% nickel, 47% cobalt, 1.4% vanadium, 0.07% niobium and 46.5% iron and impurities.
Claim 16
Dependent Claim
96 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 20 to about 23%, an ultimate tensile strength in the range from about 1430 to about 1540 MN/m 2 and a yield strength in the range from about 810 to about 1030 MN/m 2 , the alloy consisting essentially of substantially 5% nickel, 47% cobalt, 1.5% vanadium, 0.017% niobium and 46.5% iron and impurities.
Claim 17
Dependent Claim
96 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 20 to about 23%, an ultimate tensile strength in the range from about 1430 to about 1540 MN/m 2 and a yield strength in the range from about 810 to about 1030 MN/m 2 , the alloy consisting essentially of substantially 5% nickel, 47% cobalt, 1.5% vanadium, 0.017% niobium and 46.5% iron and impurities.
Claim 18
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 20 to about 21%, an ultimate tensile strength in the range from about 1200 to about 1240 MN/m 2 and a yield strength in the range from about 680 to about 800 MN/m 2 , the alloy consisting essentially of substantially 7.4% nickel, 47% cobalt, 0.66% vanadium, and 45% iron and impurities.
Claim 19
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 20 to about 21%, an ultimate tensile strength in the range from about 1200 to about 1240 MN/m 2 and a yield strength in the range from about 680 to about 800 MN/m 2 , the alloy consisting essentially of substantially 7.4% nickel, 47% cobalt, 0.66% vanadium, and 45% iron and impurities.
Claim 20
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 6 to about 9%, an ultimate tensile strength in the range from about 800 to about 940 MN/m 2 and a yield strength in the range from about 590 to about 630 MN/m 2 , the alloy consisting essentially of substantially 4.2% nickel, 35% cobalt, 1.6% vanadium, and 59% iron and impurities.
Claim 21
Dependent Claim
94 words
A soft magnetic alloy which after fabrication into strip by cold rolling followed by heat-treatment at any temperature in the range 680°-740° C. has a coercive force not greater than 1.5 kA/m, a fine microstructure, an elongation in the range from about 6 to about 9%, an ultimate tensile strength in the range from about 800 to about 940 MN/m 2 and a yield strength in the range from about 590 to about 630 MN/m 2 , the alloy consisting essentially of substantially 4.2% nickel, 35% cobalt, 1.6% vanadium, and 59% iron and impurities.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |