Grain oriented electrical steel sheet and method for manufacturing the same
US-9514868-B2 · Dec 6, 2016 · US
Grain oriented electrical steel sheet and method for manufacturing the same
US2016276081A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016276081-A1 |
| Application number | US-201615168660-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 31, 2016 |
| Priority date | Jun 29, 2010 |
| Publication date | Sep 22, 2016 |
| Grant date | — |
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Abstract
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A method of manufacturing a grain oriented electrical steel sheet includes a rolling a slab for a grain oriented electrical steel sheet to obtain a steel sheet having final sheet thickness; subjecting the steel sheet to decarburizing annealing; coating a surface of the steel sheet with annealing separator mainly composed of MgO; subjecting the steel sheet thus coated to final annealing; providing a tension coating to the steel sheet; and subjecting the steel sheet to magnetic domain refinement by laser irradiation after either the final annealing or provision of the tension coating, wherein (1) the coating weight of the anneal separator is at least 10.0 g/m 2 ; (2) coiling tension at which the steel sheet is coiled after being coated with the annealing separator is 30 N/mm 2 to 150 N/mm 2 ; and (3) the average cooling rate in cooling process of the final annealing down to 700° C. is 50° C./hour or less.
First claim
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1 . A method of manufacturing a grain oriented electrical steel sheet comprising: rolling a slab for a grain oriented electrical steel sheet to obtain a steel sheet having final sheet thickness; subjecting the steel sheet to decarburizing annealing; coating a surface of the steel sheet with annealing separator mainly composed of MgO; subjecting the steel sheet thus coated to final annealing; providing a tension coating to the steel sheet; and subjecting the steel sheet to magnetic domain refinement by laser irradiation after either the final annealing or provision of the tension coating, wherein (1) the coating weight of the anneal separator is at least 10.0 g/m 2 ; (2) coiling tension at which the steel sheet is coiled after being coated with the annealing separator is 30 N/mm 2 to 150 N/mm 2 ; and (3) the average cooling rate in cooling process of the final annealing down to 700° C. is 50° C./hour or less. 2 . The method of claim 1 , further comprising subjecting the slab to the hot rolling, optionally, hot-band annealing, and either one cold rolling operation or at least two cold rolling operations with intermediate annealing therebetween to obtain a steel sheet having the final sheet thickness. 3 . A method of manufacturing a grain oriented electrical steel sheet comprising: rolling a slab for a grain oriented electrical steel sheet to obtain a steel sheet having final sheet thickness; subjecting the steel sheet to decarburizing annealing; coating a surface of the steel sheet with annealing separator mainly composed of MgO; subjecting the steel sheet thus coated to final annealing; providing a tension coating to the steel sheet; and subjecting the steel sheet to magnetic domain refinement by electron beam irradiation after either the final annealing or provision of the tension coating, wherein (1) the coating weight of the anneal separator is at least 10.0 g/m 2 ; (2) coiling tension at which the steel sheet is coiled after being coated with the annealing separator is 30 N/mm 2 to 150 N/mm 2 ; and (3) the average cooling rate in cooling process of the final annealing down to 700° C. is 50° C./hour or less. 4 . The method of claim 3 , further comprising subjecting the slab to the hot rolling, optionally, hot-band annealing, and either one cold rolling operation or at least two cold rolling operations with intermediate annealing therebetween to obtain a steel sheet having the final sheet thickness.
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Classifications
containing nickel {(C22C38/105 takes precedence)} · CPC title
Decarburising · CPC title
Grain orientation · CPC title
with diffusion of elements, e.g. decarburising, nitriding · CPC title
containing N · CPC title
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- What does patent US2016276081A1 cover?
- A method of manufacturing a grain oriented electrical steel sheet includes a rolling a slab for a grain oriented electrical steel sheet to obtain a steel sheet having final sheet thickness; subjecting the steel sheet to decarburizing annealing; coating a surface of the steel sheet with annealing separator mainly composed of MgO; subjecting the steel sheet thus coated to final annealing; providi…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/01. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).