CN101348851B - Method for producing common oriented electrical steel by low temperature casting blank heating - Google Patents
Method for producing common oriented electrical steel by low temperature casting blank heating Download PDFInfo
- Publication number
- CN101348851B CN101348851B CN2008102220212A CN200810222021A CN101348851B CN 101348851 B CN101348851 B CN 101348851B CN 2008102220212 A CN2008102220212 A CN 2008102220212A CN 200810222021 A CN200810222021 A CN 200810222021A CN 101348851 B CN101348851 B CN 101348851B
- Authority
- CN
- China
- Prior art keywords
- oriented electrical
- electrical steel
- annealing
- temperature
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention relates to a method for producing common oriented electrical steel through low-temperature slab heating, belonging to the oriented electrical steel technical field. The method comprises the following steps: firstly, a slab is placed into a heating furnace between 1,200 and 1,300 DEG C for heat preservation for 2 to 6 hours and then hot rolled; secondly, a hot rolled plate undergoes acid cleaning and then cold rolling for two times; thirdly, a cold-rolled plate undergoes recovery annealing instead of primary recrystallization annealing; and fourthly, finished products of secondary recrystallization textures are obtained after final coating and high-temperature annealing. A CuS+Mo inhibitor is formed by addition of Cu, S and Mo in the oriented electrical steel. The method has the advantage of capability of reducing the slab heating temperature.
Description
Technical field
The present invention relates to oriented electric hilllock technical field, a kind of method of producing common oriented electrical steel by low temperature casting blank heating particularly is provided, realized the low cost production oriented electrical steel.
Background technology
Oriented electrical steel contains 3%Si and has (110)＜001〉crystallographic texture, can make oriented electrical steel be used as the core material of transformer, generator and other electronics along the excellent magnetic of rolling direction.
The secondary cold-rolling method that it is inhibitor that the industrial production oriented electrical steel has three kinds of representative technology: MnS; AlN+MnS is the once cold rolling method of inhibitor; The secondary cold-rolling method of MnSe+Sb.With AlN or MnS is that the oriented electrical steel production method of main inhibitor needs strand to exist〉heat in 1300 ℃ of process furnace, so that the product magnetic stability.Because the Heating temperature height, the strand scaling loss is serious, the energy consumption height, and lumber recovery is low.Main electrical steel manufacturer all produces the oriented electrical steel technology in the exploitation low-temperature heat both at home and abroad in recent years, and some has been used for industrial production.
It is inhibitor that Nippon Steel produces high magentic induction oriented electrical steel employing AlN, adopts 1150-1250 ℃ of strand heating, is containing NH after the decarburizing annealing
3H
2+ N
2In carry out nitriding and handle.
Nippon Steel adopts induction heater to reduce the holding temperature of slab common heating furnace greatly in addition.
It is main inhibitor that Korea S Pohang Iron and Steel Corporation proposes with AlN, Cu
2S and MnS are auxiliary inhibitor, and strand adopts twice cold-rolling practice of band process annealing at 1250-1320 ℃ of scope internal heating, produces common orientated and high magentic induction oriented electrical steel.
Summary of the invention
The object of the present invention is to provide a kind of method of producing common oriented electrical steel by low temperature casting blank heating.Realized production oriented steel low-cost, strong operability.
Strand of the present invention hot rolling behind 1200-1300 ℃ of temperature range internal heating; Hot-rolled sheet after pickling, carry out twice cold rolling; Cold-rolled steel sheet is carried out recovery annealing, replace primary recrystallization annealing; Final coating and high temperature annealing obtain the finished product of secondary recrystallization tissue.
The present invention adds Cu, S in described oriented electrical steel, Mo forms the CuS+Mo inhibitor and improves the inhibition ability.The add-on of described Cu, S, Mo is: Cu:0.01-1.1wt%, 0.001＜S≤0.03wt%, 0.002＜Mo≤0.1wt%.
Hot rolling slab heating temperature is incubated 2-6h in 1200-1300 ℃ of temperature heating oven after, if Heating temperature is too high, scaling loss is serious, the cost height; If Heating temperature is low excessively, be difficult to form suitable inhibitor distribution.
The strand hot rolling behind the 2-3mm pickling and cold-rolling to 0.23-0.30mm.Carry out recovery annealing after cold rolling, the recovery annealing temperature is at 500-800 ℃, and atmosphere is 20%-45% nitrogen hydrogen mixeding gas for hydrogen per-cent.Be coated with MgO behind the recovery annealing, high temperature annealing.
Strand composition of the present invention is: C 〉=0.005wt%, Si:2.5-6.5wt%, 0.05＜Mn≤0.5wt%, 0.01＜Als≤0.2wt%, N:0.005-0.02wt%, Cu:0.01-1.1wt%, 0.001＜S≤0.03wt%, 0.002＜Mo≤0.1wt%, surplus is iron and unavoidable impurities.
Si is at 2.5-6.5% in the steel.If Si content is less than 2.5%, magnetization is difficult, the magnetic hysteresis loss height, and the resistivity of steel is low, the eddy-current loss height; If Si content is greater than 6.5%, hot-rolled sheet tissue odds evenness increases, the secondary recrystallization difficulty.
C in the steel〉0.005%.If C content is low excessively, then there is not phase transformation in the 3%Si steel, grain coarsening during the strand heat, secondary recrystallization is incomplete behind the high temperature annealing.
0.05＜Mn in the steel≤0.5%.If Mn〉0.5%, then main the and Mn of the S in the steel is in conjunction with the thick MnS of generation, MnS solid solution difficulty in the strand; Mn crosses low then easily hot-short.
0.01＜Als in the steel≤0.2%.If Al is too high, thick AlN inclusion then appears in the strand, and unfavorable to magnetic; Al is low excessively, the restraint deficiency.
0.01%＜Cu in the steel＜1.1%.If be higher than 1.1%, the limit is split seriously during hot rolling; If be lower than 0.01%, CuxS precipitate quantity is few, suppresses scarce capacity.
0.005%＜N in the steel＜0.02%.If be higher than 0.02%, peeling and foaming defective appear in the easy surge of casting, product; If be lower than 0.005%, smelt difficulty.
0.001＜S in the steel≤0.03%.If too high, easily form thick sulfide in the strand, improve slab heating temperature, desulfurization difficulty during high temperature annealing.If low excessively, secondary recrystallization is incomplete.
0.002＜Mo in the steel≤0.1%.If too high, then suppress hyperenergia, the secondary recrystallization imperfection worsens magnetic; Cross the low inhibition effect that then do not have.
Of the present inventionly be a little,, can reduce slab heating temperature.
Embodiment
Embodiment 1
The chemical ingredients (wt%) of steel A continuously cast bloom is as table 1.
The chemical ingredients (wt%) of table 1 steel A continuously cast bloom
C Si Als Mn Cu S P N Mo
0.05 3.14 0.007 0.08 0.69 0.018 0.003 0.0070 0.006
The alloying constituent such as the table 1 of strand, all the other are iron and unavoidable impurities.Strand is incubated hot rolling behind the 2.5h in 1230 ℃ of process furnace.Hot-rolled steel sheet thickness is at 2.4mm.Cold rolling after the hot-rolled sheet pickling with twice of process annealing.Cold rolling strap is at 30vol%H
2+ 70vol%N
2500-800 ℃ of recovery annealing under the atmosphere.Be coated with MgO and high temperature annealing at last.Detect magnetic with the monolithic metering facility.Magnetic the results are shown in Table 2.
Table 2 low-temperature heating oriented electrical steel finished product magnetic property
| Test piece number (Test pc No.) | Slab heating temperature (℃) | The recovery annealing temperature (℃) | Finished product thickness (mm) | P 17 (W/Kg) | B 800(T)? |
| 1 | 1230 | 580 | 0.30 | 1.206 | 1.916 |
| 2 | 1230 | 630 | 0.30 | 1.220 | 1.901 |
| 3 | 1230 | 680 | 0.30 | 1.215 | 1.912 |
Embodiment 2
The chemical ingredients (wt%) of steel B continuously cast bloom is as table 3.
The chemical ingredients (wt%) of table 3 steel B continuously cast bloom
C Si Als Mn Cu S P N
0.05 3.10 0.008 0.08 0.68 0.020 0.003 0.007
Alloying constituent such as the table 3 of strand B, all the other are iron and unavoidable impurities.A compares with strand, and strand B does not contain Mo.Strand is incubated hot rolling behind the 2.5h in 1230 ℃ of process furnace.Hot-rolled steel sheet thickness is at 2.0-3.0mm.Cold rolling after the hot-rolled sheet pickling with twice of process annealing.Cold rolling strap is at 30vol%H
2+ 70vol%N
2500-800 ℃ of recovery annealing under the atmosphere.Be coated with MgO and high temperature annealing at last.Detect magnetic with the monolithic metering facility.Magnetic the results are shown in Table 4.
Table 4 low-temperature heating oriented electrical steel finished product magnetic property
| Test piece number (Test pc No.) | Slab heating temperature (℃) | The recovery annealing temperature (℃) | Finished product thickness (mm) | P 17 (W/Kg) | B 800(T)? |
| 4 | 1230 | 580 | 0.30 | 1.313 | 1.823 |
| 5 | 1230 | 630 | 0.30 | 1.362 | 1.818 |
| 6 | 1230 | 680 | 0.30 | 1.399 | 1.808 |
Embodiment 3
The chemical ingredients (wt%) of steel C continuously cast bloom is as table 5.
The chemical ingredients (wt%) of table 5 steel C continuously cast bloom
C Si Als Mn Cu S P N Mo
0.044 3.02 0.007 0.07 0.67 0.020 0.006 0.006 30.07
Alloying constituent such as the table 5 of strand C, all the other are iron and unavoidable impurities.With strand A ratio, it is high that strand C contains the Mo amount.Strand is incubated hot rolling behind the 2.5h in 1230 ℃ of process furnace.Hot-rolled steel sheet thickness is at 2.4mm.Cold rolling after the hot-rolled sheet pickling with twice of process annealing.Cold rolling strap is at 30vol%H
2+ 70vol%N
2500-800 ℃ of recovery annealing under the atmosphere.Be coated with MgO and high temperature annealing at last.Detect magnetic with the monolithic metering facility.Magnetic the results are shown in Table 6.
Table 6 low-temperature heating oriented electrical steel finished product magnetic property
| Test piece number (Test pc No.) | Slab heating temperature (℃) | The recovery annealing temperature (℃) | Finished product thickness (mm) | P 17 (W/Kg) | B 800(T)? |
| 7 | 1230 | 580 | 0.30 | 1.502 | 1.790 |
| 8 | 1230 | 630 | 0.30 | 1.531 | 1.782 |
| 9 | 1230 | 680 | 0.30 | 1.400 | 1.801 |
Claims (1)
1. the method for a producing common oriented electrical steel by low temperature casting blank heating is characterized in that, strand is incubated hot rolling behind the 2-6h in 1200-1300 ℃ of temperature heating oven; Hot-rolled sheet after pickling, carry out twice cold rolling; Cold-rolled steel sheet is carried out recovery annealing replace primary recrystallization annealing; Final coating and high temperature annealing obtain the finished product of secondary recrystallization tissue; In described oriented electrical steel, add Cu, S, Mo formation CuS+Mo inhibitor;
Described strand composition is: C 〉=0.005wt%, Si:2.5-6.5wt%, 0.05＜Mn≤0.5wt%, 0.01＜Als≤0.2wt%, N:0.005-0.02wt%, Cu:0.01-1.1wt%, 0.001＜S≤0.03wt%, 0.002＜Mo≤0.1wt%, surplus is iron and unavoidable impurities;
The temperature of described recovery annealing is at 500-800 ℃, and atmosphere is that hydrogen volume per-cent is the nitrogen hydrogen mixeding gas of 20%-45%;
The add-on of described Cu, S, Mo is: Cu:0.01-1.1wt%, 0.001＜S≤0.03wt%, 0.002＜Mo≤0.1wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102220212A CN101348851B (en) | 2008-09-05 | 2008-09-05 | Method for producing common oriented electrical steel by low temperature casting blank heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102220212A CN101348851B (en) | 2008-09-05 | 2008-09-05 | Method for producing common oriented electrical steel by low temperature casting blank heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101348851A CN101348851A (en) | 2009-01-21 |
| CN101348851B true CN101348851B (en) | 2010-12-01 |
Family
ID=40267825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102220212A Active CN101348851B (en) | 2008-09-05 | 2008-09-05 | Method for producing common oriented electrical steel by low temperature casting blank heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101348851B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741031B (en) * | 2013-12-27 | 2016-01-20 | 钢铁研究总院 | CSP is containing vanadium common orientation silicon steel and manufacture method thereof |
| CN105274427A (en) * | 2015-11-24 | 2016-01-27 | 武汉钢铁(集团)公司 | High-magnetic-induction oriented silicon steel and production method |
| CN106048389A (en) * | 2016-07-18 | 2016-10-26 | 华南理工大学 | Production method of non-oriented electrical steel 50W800 by traditional hot continuous rolling process |
| CN106048390B (en) * | 2016-07-18 | 2018-12-21 | 华南理工大学 | A kind of production method of thin slab continuous casting and rolling production non-oriented electrical steel 50W800 |
| CN106755790A (en) * | 2016-11-15 | 2017-05-31 | 上海大学 | A kind of utilization magnetic field recovery annealing improves the process of silicon steel performance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035853A (en) * | 1988-03-19 | 1989-09-27 | 武汉钢铁公司 | The composition of high magnetic cold-rolled orientation silicon steel and production technique |
| CN1098440A (en) * | 1993-04-05 | 1995-02-08 | 赛森钢股份公司 | Production has the method for the grain-orientated magnetic steel sheet of the heavy magnetizing loss of having improved |
| CN1850431A (en) * | 2006-05-18 | 2006-10-25 | 武汉科技大学 | High magentic induction oriented electrical steel sheet and its manufacturing method |
-
2008
- 2008-09-05 CN CN2008102220212A patent/CN101348851B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035853A (en) * | 1988-03-19 | 1989-09-27 | 武汉钢铁公司 | The composition of high magnetic cold-rolled orientation silicon steel and production technique |
| CN1098440A (en) * | 1993-04-05 | 1995-02-08 | 赛森钢股份公司 | Production has the method for the grain-orientated magnetic steel sheet of the heavy magnetizing loss of having improved |
| CN1850431A (en) * | 2006-05-18 | 2006-10-25 | 武汉科技大学 | High magentic induction oriented electrical steel sheet and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101348851A (en) | 2009-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102041440B (en) | Method for producing high magnetic induction grain-oriented silicon steel | |
| CN100381598C (en) | Orientating silicon steel, manufacturing process and equipment | |
| CN100478458C (en) | Production of non-directional cold-rolling silicon steel disc | |
| CN106702260B (en) | A kind of high-magnetic induction, low-iron loss non-orientation silicon steel and its production method | |
| CN101353760B (en) | High magnetic induction grain-oriented silicon steel and production method thereof | |
| CN101654757B (en) | Coated semi-processed non-oriented electrical steel sheet and manufacturing method thereof | |
| CN103255274B (en) | Production method of general oriented silicon steel with twice cold rolling changed into one time cold rolling | |
| CN101748257B (en) | Production method of oriented silicon steel | |
| CN102127702A (en) | Method for preparing low-S high-grade non-oriented electrical steel | |
| CN102560048B (en) | Preparation process of common oriented silicon steel | |
| CN101768697A (en) | Method for manufacturing oriented silicon steel with one-step cold rolling method | |
| CN101358273B (en) | Method for producing low-temperature oriented electrical steels | |
| CN101358272A (en) | Method for preparing high grade non-oriented electrical steel adding rare earth cerium | |
| CN103882289A (en) | Production method for manufacturing cold-rolled oriented silicon steel with high magnetic strength by using generally oriented steel raw material | |
| CN105274427A (en) | High-magnetic-induction oriented silicon steel and production method | |
| CN103572157A (en) | Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat | |
| CN101348851B (en) | Method for producing common oriented electrical steel by low temperature casting blank heating | |
| CN106399819A (en) | Oriented silicon steel and preparing method thereof | |
| CN102492893A (en) | General oriented silicon steel produced by continuous casting and rolling of sheet billet and its manufacture method | |
| CN102041368A (en) | Method for producing oriented electrical steel with excellent surface quality | |
| CN103667874A (en) | Production method for shortening furnace time of oriented silicon steel during high-temperature annealing period | |
| CN103510005B (en) | The manufacture method of grade cold rolling non-oriented electrical steel in a kind of | |
| CN102127708A (en) | Method for producing oriented electrical steel by heating low-temperature slab | |
| CN103834908B (en) | A kind of production method improving electromagnetic performance of oriented silicon steel | |
| CN101348854B (en) | Method for producing oriented electrical steel by low temperature heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |