CN103276175B - A kind of hot-rolling method for improving silicon steel electromagnetic performance - Google Patents
A kind of hot-rolling method for improving silicon steel electromagnetic performance Download PDFInfo
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- CN103276175B CN103276175B CN201310227040.5A CN201310227040A CN103276175B CN 103276175 B CN103276175 B CN 103276175B CN 201310227040 A CN201310227040 A CN 201310227040A CN 103276175 B CN103276175 B CN 103276175B
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Abstract
The present invention relates to a kind of hot-rolling method for improving silicon steel electromagnetic performance, silicon iron hot rolling process mainly includes smelting, hot rolling, cold rolling, annealing, coating, rewinding, packaging, sets coiling machine in finish rolling outlet, is directly batched after rolling, coiler plate temperature is improved, hot rolled plate is recrystallized.It is an advantage of the invention that：Directly batched using after rolling, volume normalizing treatment is reheated instead of being cooled to after hot rolling after room temperature.Hot rolling waste heat is efficiently utilized, the energy is saved, production cost is reduced.
Description
Technical field
The present invention relates to non-oriented electrical steel production technical field, more particularly to a kind of hot rolling for improving silicon steel electromagnetic performance
Method.
Background technology
Electrical sheet is rolled using hot tandem, and rolling uses section cooling.In order to reduce cold-rolled process reduction ratio, improve
Finished product crystallite dimension, reduces hot rolling plate thickness, and raising finishing temperature as far as possible.In addition, in order to avoid heating of plate blank process
Precipitate solid solution, is heated using low temperature.Because hot rolled plate is relatively thin, course of hot rolling temperature loss is more.Using higher rolling
Speed, closes interstand cooling water, can be by finishing temperature control more than 860 DEG C.
By improving hot rolled plate recrystallization rate, electromagnetic performance can be significantly improved.Existing frequently-used method is to hot rolled plate
Normalizing treatment is carried out, Deformation structure is recrystallized by reheating, cost magnetic induction and reduction iron loss is improved, produces efficient electric
Work product made from steel.Hot Rolled Plate Normalizing processing can significantly improve finished product electromagnetic performance, when electrical sheet silicone content is less than 1.7% 800
DEG C insulation can just complete within 30 seconds or so recrystallization.Traditional hot rolling highest finish to gauge can be controlled more than 850 DEG C, but due to hot rolling
Plate thickness is relatively thin, and milling train is typically provided cooling roller bed away from coiling machine.Roll rear steel plate to cool down rapidly, just drop within a short period of time
700 DEG C or so, it is impossible to Deformation structure is fully recrystallized.It is closer to the distance between each frame of other Continuous mill train, between rolling pass
The Static Recrystallization time is shorter, can not fully recrystallize.
The content of the invention
To overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of hot rolling side for improving silicon steel electromagnetic performance
Method, improves hot rolled plate recrystallization rate.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of hot-rolling method for improving silicon steel electromagnetic performance, sets coiling machine in finish rolling outlet, is directly batched after rolling, improved
Coiler plate temperature, recrystallizes hot rolled plate, specifically includes following steps：
1）Slab silicone content is less than 1.7%, and slab thickness is met：200mm ＜ steel billet thickness ＜ 300mm, slab is in temperature
950 ~ 1150 DEG C of heating, hot rolling after heating, 900 ~ 1050 DEG C of roughing finishing temperature, 30 ~ 45mm of workpiece thickness；
2）Enter finish rolling after roughing, finish rolling is rolled using Continuous mill train, finishing temperature control is at 810 ~ 900 DEG C, to improve
Finishing temperature, closes each interstand cooling water, increases by a coiling machine after non-frame, insulation is directly batched after rolling, it is to avoid after rolling
In the cooling of laminar flow section.
Compared with prior art, the beneficial effects of the invention are as follows：
Directly batched using after rolling, volume normalizing treatment is reheated instead of being cooled to after hot rolling after room temperature.Efficiently utilize
Hot rolling waste heat, saves the energy, reduces production cost.
Embodiment
The present invention is described in detail below, it should be noted that the implementation of the present invention is not limited to following embodiment party
Formula.
It is a kind of improve silicon steel electromagnetic performance hot-rolling method, silicon iron hot rolling process mainly include smelting, hot rolling, it is cold rolling, move back
Fire, coating, rewinding, packaging, set coiling machine in finish rolling outlet, are directly batched after rolling, improve coiler plate temperature, make hot rolled plate
Recrystallize, specifically include following steps：
1）Slab silicone content is less than 1.7%, and slab thickness is met：200mm ＜ steel billet thickness ＜ 300mm, slab is in temperature
950 ~ 1150 DEG C of heating, hot rolling after heating, 900 ~ 1050 DEG C of roughing finishing temperature, 30 ~ 45mm of workpiece thickness；
2）Enter finish rolling after roughing, finish rolling is rolled using Continuous mill train, finishing temperature control is at 810 ~ 900 DEG C, to improve
Finishing temperature, closes each interstand cooling water, increases by a coiling machine after non-frame, insulation is directly batched after rolling, it is to avoid after rolling
In the cooling of laminar flow section.
Embodiment：
The chemical component weight percentage of electrical sheet is：C：0.002%, Si：1.25%, Mn：0.26%, P：0.011%, S：
0.003%, Als：0.27%, remaining is iron and inevitable impurity element.
The operation of rolling of non-orientation silicon steel includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings processing, molten steel composition is controlled by above-mentioned requirements, and is casting continuously to form steel
Base, slab thickness is 230mm；
B) 2.3mm is hot-rolled down to using Continuous mill train.
C) cold rolling finished products：Steel plate through cold continuous rolling into 0.5mm it is thick after using 930 DEG C of continuous annealings.
Wherein in hot-rolled process, by heating steel billet to 1100 DEG C, open rolling of coming out of the stove, 1020 DEG C of roughing temperature, finishing temperature is
870 DEG C, cancel section cooling after rolling, directly batch insulation
Using this kind of method, the iron loss of the non-orientation silicon steel of the present embodiment is 3.51 W/kg, and magnetic strength is 1.739 T.
Comparative example：
In hot-rolled process, by heating steel billet to 1100 DEG C, start rolling temperature is 1050 DEG C, and finishing temperature is 870 DEG C, is batched
Temperature is 720 DEG C, and normalizing temperature is 920 DEG C；
The iron loss of the non-orientation silicon steel of this comparative example is 4.20W/kg, and magnetic strength is 1.712 T.
The present invention reheats volume normalizing treatment using directly being batched after rolling instead of being cooled to after hot rolling after room temperature.Effectively
Hot rolling waste heat is make use of, the energy is saved, production cost is reduced.
Claims (1)
1. a kind of hot-rolling method for improving silicon steel electromagnetic performance, the chemical component weight percentage of electrical sheet is：C：0.002%,
Si：1.25%, Mn：0.26%, P：0.011%, S：0.003%, Als：0.27%, remaining is iron and inevitable impurity member
Element；
The operation of rolling of non-orientation silicon steel includes following process steps：
A) smelt：Using converter smelting, RH vacuum refinings processing, molten steel composition is controlled by above-mentioned requirements, and is casting continuously to form steel billet, plate
Base thickness is 230mm；
B) 2.3mm is hot-rolled down to using Continuous mill train；
C) cold rolling finished products：Steel plate through cold continuous rolling into 0.5mm it is thick after using 930 DEG C of continuous annealings；
Characterized in that, in hot-rolled process, by heating steel billet to 1100 DEG C, open rolling of coming out of the stove, 1020 DEG C of roughing temperature, finishing temperature
For 870 DEG C, cancel section cooling after rolling, directly batch insulation；
Using this kind of method, the iron loss of non-orientation silicon steel is 3.51W/kg, and magnetic strength is 1.739T.
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| CN103276175B true CN103276175B (en) | 2017-09-29 |
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| CN105779728A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Hot rolling method for non-oriented electrical steel thin strip |
| CN109082607B (en) * | 2018-10-09 | 2020-01-07 | 鞍钢股份有限公司 | Non-oriented silicon steel and hot continuous rolling production method thereof |
| CN109365530B (en) * | 2018-10-09 | 2020-09-01 | 鞍钢股份有限公司 | Hot continuous rolling production method of high-grade non-oriented silicon steel |
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| CN1548569A (en) * | 2003-05-12 | 2004-11-24 | 宝山钢铁股份有限公司 | Indirectional electric steel plate without corrugated fault and its making process |
| CN101713047A (en) * | 2009-12-22 | 2010-05-26 | 武汉钢铁(集团)公司 | Cr-contained non-oriented electrical steel and production method thereof |
| CN101876028A (en) * | 2009-12-22 | 2010-11-03 | 武汉钢铁(集团)公司 | Non-oriented electrical steel for variable frequency motor and production method thereof |
| CN102453844A (en) * | 2010-10-25 | 2012-05-16 | 宝山钢铁股份有限公司 | Method for preparing non-oriented silicon steel with excellent magnetic property and high efficiency |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6254023A (en) * | 1985-08-31 | 1987-03-09 | Nippon Steel Corp | Manufacture of high-grade nonoriented electrical steel sheet |
| CN1888112A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | High magnetic induction and high grad non-orientation electrical steel and its making process |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548569A (en) * | 2003-05-12 | 2004-11-24 | 宝山钢铁股份有限公司 | Indirectional electric steel plate without corrugated fault and its making process |
| CN101713047A (en) * | 2009-12-22 | 2010-05-26 | 武汉钢铁(集团)公司 | Cr-contained non-oriented electrical steel and production method thereof |
| CN101876028A (en) * | 2009-12-22 | 2010-11-03 | 武汉钢铁(集团)公司 | Non-oriented electrical steel for variable frequency motor and production method thereof |
| CN102453844A (en) * | 2010-10-25 | 2012-05-16 | 宝山钢铁股份有限公司 | Method for preparing non-oriented silicon steel with excellent magnetic property and high efficiency |
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