Patent US4405386A successfully refreshed from Google Patents.
US4405386A
Expired / Lapsed
US
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Process and apparatus for improving cold rollability and/or strip annealability of metals and metal alloys
Assignee: Olin Corp
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Filing: 1982-04-05
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Granted: 1983-09-20
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Expires: 2002-04-05
Abstract
Abstract Selective heating of edge and near-edge portions of a strip material is used to increase the ductility of the strip material at these portions and to improve the cold rollability and/or strip annealability of the strip material. The selective heating may be performed either by radiant heating or by induction heating.
Inventors
- 👤 Brian Mravic
- 👤 Eugene Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:18
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0294; B; B21; B21B; B21B45/00; B21B45/004; C22; C22F; C22F1/00; C22F1/08; B21B1/00; B21B1/22; B21B1/24; B21B1/28; B21B1/38; B21B2001/383; B21B3/00; B21B2003/005; B21B15/00; B21B2015/0071; B21B2045/006; B21B45/008; B21B45/02; B21B45/0203; B21B45/0209; C21D8/0221; C21D8/0236; C21D8/0247; C21D8/0268; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
121 words
Process for improving the cold rollability of a strip material, said process comprising: providing a metal or metal alloy strip material having an initial thickness; cold working said strip material to obtain a desired reduction in said thickness; selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said strip material to increase the ductility of the material at said portions and the amount of reduction that can be taken before the onset of significant edge cracking; and further cold working said strip material, whereby said increased ductility at said portions and amount of reduction that can be taken permit the total reduction taken in said strip material before full annealing is required to be maximized.
Claim 2
Dependent Claim
121 words
Process for improving the cold rollability of a strip material, said process comprising: providing a metal or metal alloy strip material having an initial thickness; cold working said strip material to obtain a desired reduction in said thickness; selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said strip material to increase the ductility of the material at said portions and the amount of reduction that can be taken before the onset of significant edge cracking; and further cold working said strip material, whereby said increased ductility at said portions and amount of reduction that can be taken permit the total reduction taken in said strip material before full annealing is required to be maximized.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein said selective heating step comprises: providing means for heating by radiation; and heating said edge and near-edge portions with said radiation heating means.
Claim 4
Dependent Claim
22 words
The process of claim 2 further comprising: applying a radiation absorbant coating to said edge and near-edge portions prior to said heating.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein said selective heating step comprises: providing means for heating by induction; and heating said edge and near-edge portions with said induction heating means.
Claim 6
Dependent Claim
31 words
The process of claim 1 further comprising: providing a protective atmosphere about said edge and near-edge portions so that said heating does not cause substantially any oxidation of said strip material.
Claim 7
Dependent Claim
17 words
The process of claim 1 further comprising: fully annealing said strip material after said last working step.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein said heating step comprises: heating areas adjacent two opposed edge portions of said material.
Claim 9
Dependent Claim
120 words
Process for enhancing the strip annealability of a strip material in a cold worked condition, said process comprising: providing a metal or metal alloy strip material having an initial thickness; cold working said material to obtain a desired reduction in said thickness; providing means for strip annealing said material; and passing said material through said strip annealing means, wherein the improvement comprises: selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said strip material prior to said material being passed through said strip annealing means to increase the ductility of said portions and to increase said strip annealability by reducing the possibility of strip fracture as a result of the propagation of edge cracks.
Claim 10
Dependent Claim
120 words
Process for enhancing the strip annealability of a strip material in a cold worked condition, said process comprising: providing a metal or metal alloy strip material having an initial thickness; cold working said material to obtain a desired reduction in said thickness; providing means for strip annealing said material; and passing said material through said strip annealing means, wherein the improvement comprises: selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said strip material prior to said material being passed through said strip annealing means to increase the ductility of said portions and to increase said strip annealability by reducing the possibility of strip fracture as a result of the propagation of edge cracks.
Claim 11
Dependent Claim
29 words
The process of claim 8 wherein said selective heating step comprises: providing means for heating by radiation; and heating said edge and near-edge portions with said radiation heating means.
Claim 12
Dependent Claim
22 words
The process of claim 9 further comprising: applying a radiation absorbant coating to said edge and near-edge portions prior to said heating.
Claim 13
Dependent Claim
29 words
The process of claim 8 wherein said selective heating step comprises: providing means for heating by induction; and heating said edge and near-edge portions with said induction heating means.
Claim 14
Dependent Claim
31 words
The process of claim 8 further comprising: providing a protective atmosphere about said edge and near-edge portions so that said heating does not cause substantially any oxidation of said strip material.
Claim 15
Dependent Claim
56 words
The process of claim 8 wherein: said strip annealing means has looper rolls about which said strip material passes and means for applying a forward tensile force to said strip material; and said heating step reducing the stresses in said material caused by passing said strip about said looper rolls and by said forward tensile force.
Claim 16
Dependent Claim
20 words
The process of claim 8 wherein said heating step comprises: heating areas adjacent two opposed edge portions of said material.
Claim 17
Independent Claim
130 words
An apparatus for improving cold rollability of a metal or metal alloy strip material having an initial thickness, said apparatus comprising: first means for cold working said strip material to obtain a desired reduction in said thickness; second means for further cold working said strip material; and means for maximizing the total reduction that can be taken in said strip material before full annealing is required, said maximizing means comprising means for selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said material prior to said material being passed to said second cold working means, said selective heating means increasing the ductility of the material at said portions and the amount of reduction that can be taken before the onset of significant edge cracking.
Claim 18
Independent Claim
130 words
An apparatus for improving cold rollability of a metal or metal alloy strip material having an initial thickness, said apparatus comprising: first means for cold working said strip material to obtain a desired reduction in said thickness; second means for further cold working said strip material; and means for maximizing the total reduction that can be taken in said strip material before full annealing is required, said maximizing means comprising means for selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said material prior to said material being passed to said second cold working means, said selective heating means increasing the ductility of the material at said portions and the amount of reduction that can be taken before the onset of significant edge cracking.
Claim 19
Dependent Claim
21 words
The apparatus of claim 15 wherein said selective heating means comprises: means for heating said edge and near-edge portions by radiation.
Claim 20
Dependent Claim
23 words
The apparatus of claim 16 further comprising: means for applying a radiation absorbant coating to said edge and near-edge portions prior to heating.
Claim 21
Dependent Claim
20 words
The apparatus of claim 15 wherein said selective heating means comprises: means for inductively heating said edge and near-edge portions.
Claim 22
Dependent Claim
33 words
The apparatus of claim 15 further comprising: means for providing a protective atmosphere about said edge and near-edge portions so that said heating does not cause substantially any oxidation of said strip material.
Claim 23
Dependent Claim
14 words
The apparatus of claim 15 further comprising: means for fully annealing said strip material.
Claim 24
Independent Claim
105 words
An apparatus for enhancing strip annealability of a metal or metal alloy strip material having an initial thickness in a cold worked condition, said apparatus comprising: means for cold working said material to obtain a desired reduction in said thickness; means for strip annealing said material; and means for selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said material prior to said material passing into said strip annealing means to increase the ductility of said portions and to increase said strip annealability by reducing the possibility of strip fracture as a result of the propagation of edge cracks.
Claim 25
Independent Claim
105 words
An apparatus for enhancing strip annealability of a metal or metal alloy strip material having an initial thickness in a cold worked condition, said apparatus comprising: means for cold working said material to obtain a desired reduction in said thickness; means for strip annealing said material; and means for selectively heating edge and near-edge portions of said material without significantly annealing the bulk of said material prior to said material passing into said strip annealing means to increase the ductility of said portions and to increase said strip annealability by reducing the possibility of strip fracture as a result of the propagation of edge cracks.
Claim 26
Dependent Claim
21 words
The apparatus of claim 21 wherein said selective heatiing means comprises: means for heating said edge and near-edge portions by radiation.
Claim 27
Dependent Claim
24 words
The apparatus of claim 22 further comprising: means for applying a radiation absorbant coating to said edge and near-edge portions prior to said heating.
Claim 28
Dependent Claim
20 words
The apparatus of claim 21 wherein said selective heating means comprises: means for inductively heating said edge and near-edge portions.
Claim 29
Dependent Claim
33 words
The apparatus of claim 21 further comprising: means for providing a protective atmosphere about said edge and near-edge portions so that said heating does not cause substantially any oxidation of said strip material.
Claim 30
Dependent Claim
72 words
The apparatus of claim 21 wherein: said strip annealing means comprises looper rolls about which said strip material passes and means for applying a forward tensile force to said strip material to pull said strip material through said strip annealing means, whereby said selective heating of said edge and near-edge portions reduces the stresses in said material caused by passing said strip about said looper rolls and by said forward tensile force.
References Cited (Backward Citations)
US1870577A
Cited
US2256947A
Cited
US3264143A
Cited
US3267252A
Cited
US3480486A
Cited
US3536540A
Cited
US3522116A
Cited
US3613425A
Cited
US3836743A
Cited
US3848104A
Cited
US3877867A
Cited
US4151014A
Cited
GB1597066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |