US4052234A
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Method for continuously quenching electrolytic tin-plated steel strip
Assignee: JFE Engineering Corp
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Filing: 1975-10-07
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Granted: 1977-10-04
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Expires: 1995-10-07
Abstract
Abstract In order to brighten the surface of a tin-plated layer of steel strip tin-plated on a commonly known continuous electrolytic tin-plating line, said strip is heated in a traditional continuous heating furnace for rapid fusion of its tin-plated layer, and then promptly quenched for solidification. In doing so, said quenching is carried out in two stages aiming at obtaining an excellent corrosion resistance as well as preventing the occurrence of quench stains. In other words, a relatively low-rate quenching in the initial stage is carried out by spraying a quenching liquid mist or a stream of high-pressure quenching liquid onto both sides of said strip across the entire width, uniformly on the same horizontal level, in the air above the surface of quenching liquid in a quenching tank immediately following said heating furnace, before said strip comes into the quencing liquid in said quenching tank. Then, a relatively high-rate quenching in the second stage is carried out for said strip having come into the quenching liquid in said quenching tank by spraying quenching liquid of a high-pressure and in a large quantity onto both sides of said strip across the entire width, uniformly on the same horizontal level, beneath the surface of quenching liquid in said quenching tank.
Inventors
- 👤 Hidehisa Yamagishi
- 👤 Mizuo Tanaka
- 👤 Riichi Shiono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:33
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573; C25; C25D; C25D5/00; C25D5/48; C25D5/50; C25D5/505
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising 1. maintaining a relatively low quenching rate of from 500° to 900° C. per second by spraying a quenching liquid mist onto a continuously moving tin-plated steel strip with its tin-plated layer fused thereto with heat, in the air above the surface of a quenching liquid maintained in a quenching tank, with a quantity of said quenching liquid of from 0.002 to 0.08 liter per square meter per minute, followed by 2.
Claim 2
Independent Claim
85 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising 1. maintaining a relatively low quenching rate of from 500° to 900° C. per second by spraying a quenching liquid mist onto a continuously moving tin-plated steel strip with its tin-plated layer fused thereto with heat, in the air above the surface of a quenching liquid maintained in a quenching tank, with a quantity of said quenching liquid of from 0.002 to 0.08 liter per square meter per minute, followed by 2.
Claim 3
Dependent Claim
48 words
passing said strip into said quenching tank containing said quenching liquid, and 3. maintaining a relatively higher quenching rate of from 1,100° to 1,300° C. per second by spraying a larger quantity of quenching liquid of at least 1.2 liters per square meter per minute under a high
Claim 4
Dependent Claim
48 words
passing said strip into said quenching tank containing said quenching liquid, and 3. maintaining a relatively higher quenching rate of from 1,100° to 1,300° C. per second by spraying a larger quantity of quenching liquid of at least 1.2 liters per square meter per minute under a high
Claim 5
Dependent Claim
162 words
pressure onto said strip beneath said surface in said quenching tank. 2. A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising 1. maintaining a relatively low quenching rate of from 500° to 900° C. per second by spraying a quenching liquid at high pressure along a guide plate onto a continuously moving tin-plated steel strip with its tin-plated layer fused thereto with heat, in the air above the surface of a quenching liquid maintained in a quenching tank, with a quantity of said quenching liquid of from 0.2 to 0.8 liter per square meter per minute, followed by 2. passing said strip into said quenching tank containing said quenching liquid, and 3. maintaining a relatively higher quenching rate of from 1,100° to 1,300° C. per second by spraying a larger quantity of quenching liquid of at least 1.2 liters per square meter per minute under a high pressure onto said strip beneath said surface in said quenching tank.
Claim 6
Dependent Claim
162 words
pressure onto said strip beneath said surface in said quenching tank. 2. A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising 1. maintaining a relatively low quenching rate of from 500° to 900° C. per second by spraying a quenching liquid at high pressure along a guide plate onto a continuously moving tin-plated steel strip with its tin-plated layer fused thereto with heat, in the air above the surface of a quenching liquid maintained in a quenching tank, with a quantity of said quenching liquid of from 0.2 to 0.8 liter per square meter per minute, followed by 2. passing said strip into said quenching tank containing said quenching liquid, and 3. maintaining a relatively higher quenching rate of from 1,100° to 1,300° C. per second by spraying a larger quantity of quenching liquid of at least 1.2 liters per square meter per minute under a high pressure onto said strip beneath said surface in said quenching tank.
Claim 7
Dependent Claim
47 words
The method of claim 1, wherein said mist is so sprayed in (1) onto both sides of said strip from a plurality of spray nozzles positioned on both sides of said strip across the entire width thereof and substantially on the same horizontal level with each other.
Claim 8
Dependent Claim
47 words
The method of claim 1, wherein said liquid is so sprayed in (3) onto both sides of said strip from a plurality of spray nozzles positioned on both sides of said strip across the entire width thereof and substantially on the same horizontal level with each other.
Claim 9
Dependent Claim
47 words
The method of claim 2, wherein said liquid is so sprayed in (1) onto both sides of said strip from a plurality of spray nozzles positioned on both sides of said strip across the entire width thereof and substantially on the same horizontal level with each other.
Claim 10
Dependent Claim
47 words
The method of claim 2, wherein said liquid is so sprayed in (3) onto both sides of said strip from a plurality of spray nozzles positioned on both sides of said strip across the entire width thereof and substantially on the same horizontal level with each other.
Claim 11
Dependent Claim
25 words
The method of claim 1, wherein the quenching liquid sprayed in (3) is at a pressure between 4 kg/cm 2 and 10 kg/cm 2 .
Claim 12
Dependent Claim
38 words
The method of claim 2, wherein the quenching liquid sprayed in (1) is at a pressure between 2 kg/cm 2 and 20 kg/cm 2 , and in (3) is between 4 kg/cm 2 and 10 kg/cm 2 .
Claim 13
Independent Claim
180 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising: moving said strip in a substantially vertical direction through the atmosphere; spraying a first quantity of a quenching liquid mist towards said strip from both sides thereof and at substantially the same horizontal level, said spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip; thereafter passing said strip in a substantially vertical direction into a quenching tank containing a quenching liquid; and then spraying a second quantity of a quenching liquid at high pressure toward said strip from both sides thereof below the surface of the quenching liquid in said quenching tank and at substantially the same horizontal level below the surface of the quenching liquid in said quenching tank, said high-pressure spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip, said second quantity of quenching liquid being greater than said first quantity.
Claim 14
Independent Claim
180 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising: moving said strip in a substantially vertical direction through the atmosphere; spraying a first quantity of a quenching liquid mist towards said strip from both sides thereof and at substantially the same horizontal level, said spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip; thereafter passing said strip in a substantially vertical direction into a quenching tank containing a quenching liquid; and then spraying a second quantity of a quenching liquid at high pressure toward said strip from both sides thereof below the surface of the quenching liquid in said quenching tank and at substantially the same horizontal level below the surface of the quenching liquid in said quenching tank, said high-pressure spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip, said second quantity of quenching liquid being greater than said first quantity.
Claim 15
Independent Claim
242 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising: moving said strip in a substantially vertical direction through said atmosphere between at least a pair of guide plates; spraying a first quantity of high-pressure quenching liquid toward said strip from both sides thereof and at substantially the same horizontal level, said spraying being directed at an angle within the range between an upwardly directed parallel direction and 45° in an upward direction relative to said substantially vertically moving strip, at least a portion of said high-pressure quenching liquid spray being directed toward said guide plates; deflecting with said guide plates said portion of said high-pressure quenching liquid spray directed thereon toward said strip, the uppermost part of said guide plates being curved toward said strip, the curved uppermost parts ending substantially at the same horizontal level; thereafter passing said strip in a substantially vertical direction into a quenching tank containing a quenching liquid; and then spraying a second quantity of a high-pressure quenching liquid toward said strip from both sides thereof below the surface of the quenching liquid in said quenching tank and at substantially the same horizontal level below the surface of the quenching liquid in said quenching tank, said high-pressure spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip, and said second quantity being greater than said first quantity.
Claim 16
Independent Claim
242 words
A method of continuously quenching a continuously moving electrolytic tin-plated steel strip, comprising: moving said strip in a substantially vertical direction through said atmosphere between at least a pair of guide plates; spraying a first quantity of high-pressure quenching liquid toward said strip from both sides thereof and at substantially the same horizontal level, said spraying being directed at an angle within the range between an upwardly directed parallel direction and 45° in an upward direction relative to said substantially vertically moving strip, at least a portion of said high-pressure quenching liquid spray being directed toward said guide plates; deflecting with said guide plates said portion of said high-pressure quenching liquid spray directed thereon toward said strip, the uppermost part of said guide plates being curved toward said strip, the curved uppermost parts ending substantially at the same horizontal level; thereafter passing said strip in a substantially vertical direction into a quenching tank containing a quenching liquid; and then spraying a second quantity of a high-pressure quenching liquid toward said strip from both sides thereof below the surface of the quenching liquid in said quenching tank and at substantially the same horizontal level below the surface of the quenching liquid in said quenching tank, said high-pressure spraying being directed at an angle within the range between a right angle and 45° in an upward direction relative to said substantially vertically moving strip, and said second quantity being greater than said first quantity.
References Cited (Backward Citations)
US3410734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |