CN104741391A - Non-oriented electrical steel rolling technology of medium-low marks - Google Patents
Non-oriented electrical steel rolling technology of medium-low marks Download PDFInfo
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- CN104741391A CN104741391A CN201310725032.3A CN201310725032A CN104741391A CN 104741391 A CN104741391 A CN 104741391A CN 201310725032 A CN201310725032 A CN 201310725032A CN 104741391 A CN104741391 A CN 104741391A
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- rolling
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- temperature
- oriented electrical
- electrical steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The invention discloses a non-oriented electrical steel rolling technology of medium-low marks; a hot rolling technology greatly influences on the product performance and the rolling stability; and for non-oriented electrical steel of medium-low marks, when the rolling is performed in a two-phase region, the hot rolling plasticity is obviously reduced, the plate shape changes bad, and such conditions as edge crack are liable to be generated. With 50 W 1000 as an example, the deformation resistance is researched to obtain a conclusion of controlling the two-phase region between F4 and F5 as an optimal rolling technology. On the basis, one set of more reasonable hot rolling technology system is set. After the novel rolling technology is adopted, the stability of 50 W 1000 finish hot rolling is obviously improved, and the pass percent of hot rolled products is improved from initial 40% to above 95%.
Description
Technical field
The invention belongs to casting technology field, be specifically related to low code non-oriented electrical steel rolling mill practice in one.
Background technology
For in the non-oriented electrical steel of the low trade mark, in order to improve electromagnetic performance, require that hot rolling must at ferrite region rolling, generally adopt in austenitic area open rolling, ferrite area finish to gauge, finishing temperature is at Ar
3below transformation temperature.But when when two-phase section rolling, because austenite is different with Ferrite Deformation drag, its operation of rolling is unstable; Meanwhile, cause distortion uneven because resistance of deformation is different, hot rolling plasticity obviously reduces, and plate deformation is bad, easily occurs that limit is split, and it is useless that severe patient even occurs that batch rolls.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, provide low code non-oriented electrical steel rolling mill practice in one, directly can cast out flange bolt hole, the precision of bolt hole, processing technology thereof is simple.
Low code non-oriented electrical steel rolling mill practice in provided by the invention, comprises the following steps:
(1) heat: in 50W1000 electrical sheet, the mass fraction of silicon is 0.30% ~ 0.50%, when silicon mass fraction higher than 0.2% steel heat time, produce Fe at iron scale and base metal interface
2siO
4.Its setting temperature is 1170 DEG C, the Fe after fusing
2siO
4be combined closely with base steel at interface, make steel slab surface form red scale and not easily remove, so require that bringing-up section temperature can not more than 1170 DEG C;
(2) rolling: finish rolling will ensure F5, F6 ferrite region rolling, two-phase section is controlled between frame simultaneously, entry temperature at finishing is 950 DEG C ~ 1030 DEG C, F4 frame strip temperature control is 900 DEG C ~ 930 DEG C, the empty mistake of F4 frame, and after F4 frame, cooling water is opened simultaneously, in order that make austenite change ferrite into rapidly in the operation of rolling, make two-phase section be between frame, improve rolling stability, can ensure that last 2 frames are at ferrite region rolling simultaneously;
3) batch: coiling temperature is 600 DEG C ~ 650 DEG C, improve coiling temperature and can improve magnetic.
Low code non-oriented electrical steel rolling mill practice in provided by the invention, its beneficial effect is, overcome distortion uneven, hot rolling plasticity obviously reduces, the shortcoming that plate deformation is bad.By control 50W1000 electrical sheet rolling mill practice, effectively avoid two-phase section rolling, while raising product electromagnetic performance, rolling stability is good, and hot rolling accepted product percentage reaches more than 95%.
Detailed description of the invention
Below in conjunction with an embodiment, low code non-oriented electrical steel rolling mill practice in provided by the invention is described in detail.
Embodiment
Low code non-oriented electrical steel rolling mill practice in the present embodiment, comprises the following steps:
(1) heat: in 50W1000 electrical sheet, the mass fraction of silicon is 0.35%, when silicon mass fraction higher than 0.2% steel heat time, produce Fe at iron scale and base metal interface
2siO
4.Its setting temperature is 1170 DEG C, the Fe after fusing
2siO
4be combined closely with base steel at interface, make steel slab surface form red scale and not easily remove, so require that bringing-up section temperature can not more than 1170 DEG C;
(2) rolling: finish rolling will ensure F5, F6 ferrite region rolling, two-phase section is controlled between frame simultaneously, entry temperature at finishing is 1000 DEG C, F4 frame strip temperature control is 920 DEG C, the empty mistake of F4 frame, and after F4 frame, cooling water is opened simultaneously, in order that make austenite change ferrite into rapidly in the operation of rolling, make two-phase section be between frame, improve rolling stability, can ensure that last 2 frames are at ferrite region rolling simultaneously;
(3) batch: coiling temperature is 620 DEG C, improve coiling temperature and can improve magnetic.
Claims (1)
1. a low code non-oriented electrical steel rolling mill practice in, is characterized in that: said method comprising the steps of:
(1) heat: in 50W1000 electrical sheet, the mass fraction of silicon is 0.30% ~ 0.50%, when silicon mass fraction higher than 0.2% steel heat time, produce Fe at iron scale and base metal interface
2siO
4, its setting temperature is 1170 DEG C, the Fe after fusing
2siO
4be combined closely with base steel at interface, make steel slab surface form red scale and not easily remove, so require that bringing-up section temperature can not more than 1170 DEG C;
(2) rolling: finish rolling will ensure F5, F6 ferrite region rolling, two-phase section is controlled between frame simultaneously, entry temperature at finishing is 950 DEG C ~ 1030 DEG C, F4 frame strip temperature control is 900 DEG C ~ 930 DEG C, the empty mistake of F4 frame, and after F4 frame, cooling water is opened simultaneously, in order that make austenite change ferrite into rapidly in the operation of rolling, make two-phase section be between frame, improve rolling stability, can ensure that last 2 frames are at ferrite region rolling simultaneously;
(3) batch: coiling temperature is 600 DEG C ~ 650 DEG C, improve coiling temperature and can improve magnetic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725032.3A CN104741391A (en) | 2013-12-25 | 2013-12-25 | Non-oriented electrical steel rolling technology of medium-low marks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725032.3A CN104741391A (en) | 2013-12-25 | 2013-12-25 | Non-oriented electrical steel rolling technology of medium-low marks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104741391A true CN104741391A (en) | 2015-07-01 |
Family
ID=53581971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310725032.3A Pending CN104741391A (en) | 2013-12-25 | 2013-12-25 | Non-oriented electrical steel rolling technology of medium-low marks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104741391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825067A (en) * | 2017-04-01 | 2017-06-13 | 首钢总公司 | A kind of control method for improving alloy welding wire copper coating aberration |
-
2013
- 2013-12-25 CN CN201310725032.3A patent/CN104741391A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825067A (en) * | 2017-04-01 | 2017-06-13 | 首钢总公司 | A kind of control method for improving alloy welding wire copper coating aberration |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |