CN102534363B - A kind of common orientation silicon steel manufacture method of energy-saving high efficiency - Google Patents

A kind of common orientation silicon steel manufacture method of energy-saving high efficiency Download PDF

Info

Publication number
CN102534363B
CN102534363B CN201010597075.4A CN201010597075A CN102534363B CN 102534363 B CN102534363 B CN 102534363B CN 201010597075 A CN201010597075 A CN 201010597075A CN 102534363 B CN102534363 B CN 102534363B
Authority
CN
China
Prior art keywords
annealing
rolling
silicon steel
temperature
high temperature
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
Application number
CN201010597075.4A
Other languages
Chinese (zh)
Other versions
CN102534363A (en
Inventor
蒋奇武
金文旭
付勇军
游清雷
张静
张海利
庞树芳
王晓达
苏皓璐
贾志伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201010597075.4A priority Critical patent/CN102534363B/en
Publication of CN102534363A publication Critical patent/CN102534363A/en
Application granted granted Critical
Publication of CN102534363B publication Critical patent/CN102534363B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The present invention discloses a kind of common orientation silicon steel manufacture method of energy-saving high efficiency, and operational path is: smelt and continuous casting → hot rolling → normalizing pickling → once cold rolling → decarburizing annealing → secondary cold-rolling → secondary recrystallization annealing → MgO coating → high temperature purification annealing → smooth annealing and coating coating insulating film.The present invention is premised on the low-temperature heat of oriented silicon steel strand, decarburizing annealing is carried out between cold rolling at twice, save process annealing operation, oriented silicon steel high temperature annealing be divided into secondary recrystallization annealing and high temperature purification annealing and implement respectively, reaching energy-saving and cost-reducing, raising rhythm of production and the object of production efficiency.

Description

A kind of common orientation silicon steel manufacture method of energy-saving high efficiency
Technical field
The present invention relates to a kind of production method of common orientation silicon steel, especially a kind of common orientation silicon steel manufacture method of energy-saving high efficiency.
Background technology
Oriented silicon steel is narrow and complicated process of preparation with its process window, is described as " artwork " in steel products, is be applied in non-retentive alloy important in electric power, electronic industry.
The production process route of common orientation silicon steel is: smelt and continuous casting → heat and hot rolling → once cold rolling → process annealing → secondary cold-rolling → decarburizing annealing → MgO coating → high temperature annealing → smooth annealing and coating coating insulating film.
Along with the requirement of the growing tension of power supply and environmental protection, low-carbon economy development, the shortcoming of strand heat reveals more and more highlightedly, strand low-temperature heat technology has become the Main Trends of The Development that oriented silicon steel is produced, cause the common concern of Ge great oriented silicon steel factory of the world, and disclosed some low-temperature heat technology, as cupric common orientation silicon steel low-temperature heat method, containing crystal boundary enriched element Sb or Sn common orientation silicon steel low-temperature heat method, reduce Mn, S, C content common orientation silicon steel low-temperature heat method etc.
Common orientation silicon steel need of production carries out process annealing and decarburizing annealing, and twice annealing can make C content in steel be reduced to below 30ppm.But twice annealing can make, and production cost increases, production efficiency reduces.
The high-temperature annealing process of oriented silicon steel should realize the secondary recrystallization of coil of strip, carries out steel purification process again.High temperature annealing all adopts bell furnace or ring furnace, and oriented silicon steel twists in more than 600 DEG C and carried out secondary recrystallization by slowly heat up with stove (heat-up rate is generally 15 ~ 25 DEG C/h), and the heating-up time is 30 ~ 40h; And in order to purify steel (i.e. steel desulfurization), then need in high temperature section (1180 ~ 1210 DEG C) insulation for a long time (soaking time is 10 ~ 40h), therefore, high temperature annealing total production cycle is very long, becomes the bottleneck that oriented silicon steel is produced.
Summary of the invention
The object of the present invention is to provide a kind of common orientation silicon steel manufacture method of energy-saving high efficiency, premised on the low-temperature heat of oriented silicon steel strand, decarburizing annealing is carried out between cold rolling at twice, save process annealing operation, oriented silicon steel high temperature annealing be divided into secondary recrystallization annealing and high temperature purification annealing and implement respectively, reaching energy-saving and cost-reducing, raising rhythm of production and the object of production efficiency.
1 operational path
Smelt and continuous casting → hot rolling → normalizing pickling → once cold rolling → decarburizing annealing → secondary cold-rolling → secondary recrystallization annealing → MgO coating → high temperature purification annealing → smooth annealing and coating coating insulating film.
2 processing parameters
2.1 smelt and continuous casting
Composition of the present invention is different from conventional oriented silicon steel, C and Mn content of the present invention is respectively 0.01% ~ 0.03% and 0.10% ~ 0.15%; C content minimizing is conducive to the abundant decarburization of decarburizing annealing, is conducive to saving process annealing operation.And the increase of Mn content can ensure hot rolling and normalizing heating time there is a certain amount of austenite, be convenient to formed small and dispersed distribution second phase particles, be conducive to final secondary recrystallization and magnetic property.Smelt the oriented silicon steel composition of acquisition in table 1.Slab thickness is 200 ~ 250mm.
Table 1 composition (wt%)
C Si Mn P S Als N
0.01～0.03 3.0～3.6 0.10～0.15 0.01～0.03 0.02～0.03 0.01～0.02 0.007～0.010
2.2 hot rolling technology
Hot rolling adopts low-temperature heat technology, is conducive to save energy.Strand is heated to 1200 ~ 1280 DEG C in process furnace, and insulation 120 ~ 180min, obtains the hot-rolled steel sheet of 2.0 ~ 2.5mm thickness through hot rolling after heat treated.
2.3 normalizing process
In the present invention, the inhibitor quantity of hot rolled strip is few; restraint is weak; the AlN second phase particles quantity of small and dispersed distribution is increased by suitable normalizing process; strengthen inhibitor ability; be the guarantee realizing the low-temperature heat of oriented silicon steel strand, be related to the finished product and can obtain excellent tissue and magnetic property.
Steel plate, at 1100 ~ 1200 DEG C of heating 2 ~ 3min, at 900 ~ 950 DEG C of insulation 30 ~ 40s, by heat water-spraying's steel plate upper and lower surface of 40 ~ 60 DEG C, makes steel billet temperature reduce rapidly, utilizes air cooling method that steel billet temperature is reduced to less than 100 DEG C, then pickling, washing.
2.4 once cold rolling techniques
After once cold rolling of the present invention, steel plate thickness is 0.5 ~ 0.6mm, and it is 75% ~ 80% that once cold rolling total reduction controls.
2.5 decarburizing annealing techniques
Protective atmosphere is wet 20%H 2+ 80%N 2, it is 40 ~ 60 DEG C that humidification temperature controls, and at 840 ~ 880 DEG C of insulation 6 ~ 8min after 950 ~ 1050 DEG C of heating 30 ~ 40s, guarantees that C content is reduced to below 30ppm.
2.6 secondary cold-rolling techniques
It is 40% ~ 60% that secondary cold-rolling total reduction controls, and rolling rear steel plate thickness is 0.23 ~ 0.30mm.
2.7 secondary recrystallization annealing processs
Control for Kiln Temperature is at 950 ~ 1050 DEG C, and soaking time>=30min, protection gas is dry N 2+ H 2, H 2content is 75% ~ 100%.At N after secondary recrystallization annealing 2room temperature is as cold as soon in protective atmosphere.
Furnace temperature too low (< 950 DEG C), there is not secondary recrystallization in steel plate, furnace temperature too high (> 1050 DEG C), and the secondary recrystallization crystal grain position of formation is to inaccurate, and the finished product magnetic property is poor.
H in protective atmosphere 2it is 75% ~ 100% that content controls, and object promotes Goss abnormal grain growth by hydrogen, forms position to Goss texture accurately.
The secondary recrystallization time too short (< 30min), then steel plate secondary recrystallization is incomplete, and product magnetic property is poor.
2.8MgO coating process
On steel plate, be formed with in order to final the glassy membrane bottom being beneficial to magnetic property, secondary recrystallization annealed sheet steel need apply MgO, and coating process is: it is 15% ~ 25%, TiO that MgO concentration controls 2/ MgO=5% ~ 7%; Sintering temperature is 200 ~ 600 DEG C, and sintering time is 1 ~ 5min.
2.9 high temperature purification annealing processs
Steel plate completes secondary recrystallization in secondary recrystallization annealing process, defines position to Goss texture accurately, and therefore, the Main Function of high temperature purification annealing is purification steel (de-S).Due to secondary recrystallization problem need not be considered in temperature-rise period, therefore can be rapidly heated more than 1200 DEG C and directly carry out desulfurization process.
Use N 2purge furnace air, in 3 ~ 4h, be rapidly heated 1200 ~ 1210 DEG C.< 600 DEG C adopts pure N 2protection,>=600 DEG C change pure H into 2protective atmosphere; At 1200 ~ 1210 DEG C of high temperature section insulation 10 ~ 40h, carry out desulphurization reaction: S+H 2=H 2s, H 2s gas is discharged by pipeline, plays the effect of purification steel; Controlled cooling model is come out of the stove to less than 300 DEG C.
By Mg (OH) in temperature-rise period 2the H decomposed 2o will react with steel plate at relatively high temperatures, and form compact oxidation layer, zone of oxidation main ingredient is SiO 2and FeO; Steel plate is warmed up to 1000 ~ 1210 DEG C, and SiO occurs for surface oxide layer and MgO 2+ MgO=Mg 2siO 4reaction, generates glassy membrane bottom.
2.10 smooth annealing and coating coating insulating films
Identical with common process.
The present invention is premised on the low-temperature heat of oriented silicon steel strand, decarburizing annealing is carried out between cold rolling at twice, save process annealing operation, oriented silicon steel high temperature annealing be divided into secondary recrystallization annealing and high temperature purification annealing and implement respectively, reaching energy-saving and cost-reducing, raising rhythm of production and the object of production efficiency.Having has advantage below:
1) low-temperature heating method is utilized to realize the energy-saving and cost-reducing of oriented silicon steel production;
2) carry out decarburizing annealing between cold rolling at twice, save process annealing operation, make production compacter;
3) oriented silicon steel high temperature annealing is divided into secondary recrystallization annealing and high temperature purification anneal and implement respectively, significantly improve oriented silicon steel production efficiency.
Accompanying drawing explanation
Fig. 1 is that secondary recrystallization annealing process is to magnetic property iron loss P 1.7impact;
Fig. 2 is that secondary recrystallization annealing process is to magnetic property iron loss magnetic strength B 800impact.
Embodiment
1 operational path
Smelt and continuous casting → hot rolling → normalizing pickling → once cold rolling → decarburizing annealing → secondary cold-rolling → secondary recrystallization annealing → MgO coating → high temperature purification annealing → smooth annealing and coating coating insulating film;
2 processing parameters
2.1 smelt and continuous casting
Smelt the oriented silicon steel composition of acquisition in table 2, slab thickness is 230mm.
Table 2 composition (wt%)
C Si Mn P S Als N
0.025 3.3 0.14 0.015 0.025 0.018 0.008
2.2 hot rolling technology
Strand is heated to 1280 DEG C in process furnace, and insulation 150min, obtains the hot-rolled steel sheet of 2.3mm thickness through hot rolling after heat treated.
2.3 normalizing process
Steel plate is at 1150 DEG C of heating 2.5min, and air cooling, to 900 DEG C of insulation 40s, by heat water-spraying's steel plate upper and lower surface of 50 DEG C, utilizes air cooling method that steel billet temperature is reduced to less than 100 DEG C, then pickling, washing.
2.4 once cold rolling techniques
It is 76% that once cold rolling total reduction controls.Rolling rear steel plate thickness is 0.55mm.
2.5 decarburizing annealing techniques
Protective atmosphere is wet 20%H 2+ 80%N 2, it is 45 DEG C that humidification temperature controls, at 870 DEG C of insulation 7min after 1000 DEG C of heating 35s.
2.6 secondary cold-rolling techniques
Secondary cold-rolling total reduction is 45.5%, and rolling rear steel plate thickness is 0.30mm.
2.7 secondary recrystallization annealing processs
Be respectively 900,950,1000,1050,1100 DEG C in furnace temperature, protective atmosphere is respectively dry 75%H 2+ 25%N 2, 100%H 2shi Jinhang secondary recrystallization is annealed, and soaking time is respectively 20min, 30min, 40min; At N after secondary recrystallization annealing 2room temperature is as cold as fast in protection gas.
2.8MgO coating process
Steel plate after secondary recrystallization annealing applies MgO, and MgO concentration is 20%, TiO 2/ MgO=5%.In 300 DEG C of insulation 3min in drying oven.
2.9 high temperature purification annealing processs
Steel plate high temperature purification annealing process is: use N 2purge furnace air, in 4h, be rapidly heated 1200 DEG C.< 600 DEG C adopts pure N 2protective atmosphere,>=600 DEG C change pure H into 2protective atmosphere; At 1200 DEG C of high temperature section insulation 20h; 20h is cooled to 700 DEG C to change pure N into 2protective atmosphere, 10h is cooled to less than 300 DEG C to come out of the stove.
2.10 smooth annealing and coating coating insulating films
Identical with common process.
Fig. 1,2 is the impact of secondary recrystallization annealing process on final magnetic property, can find out, furnace temperature is at 950 ~ 1050 DEG C, and soaking time sample magnetic property when more than 30min reaches Standard, comparatively speaking, and 75%H 2+ 25%N 2protective atmosphere magnetic sample performance is better.
Table 1 is embodiment and conventional oriented silicon steel annealing time.Can find out from table 1 contrast, the total annealing time of the present invention 1640 ~ 1650min fewer than conventional oriented silicon steel, annealing production efficiency improves about 33.5%.
Table 1 embodiment and conventional oriented silicon steel annealing time (min)

Claims (1)

1. a common orientation silicon steel manufacture method for energy-saving high efficiency, is characterized in that operational path is: smelt and continuous casting → hot rolling → normalizing pickling → once cold rolling → decarburizing annealing → secondary cold-rolling → secondary recrystallization annealing → MgO coating → high temperature purification annealing → smooth annealing and coating coating insulating film;
Smelt and continuous casting: smelting chemical composition by weight percent is C0.01% ~ 0.03%, Si3.0% ~ 3.6%, Mn0.10% ~ 0.15%, P0.01% ~ 0.03%, S0.02% ~ 0.03%, Als0.01% ~ 0.02%, N0.007% ~ 0.010%, and surplus is Fe and inevitable impurity; Slab thickness is 200 ~ 250mm;
Hot rolling technology: strand is heated to 1200 ~ 1280 DEG C in process furnace, insulation 120 ~ 180min, obtains the hot-rolled steel sheet of 2.0 ~ 2.5mm thickness through hot rolling;
Normalizing process: steel plate is at 1100 ~ 1200 DEG C of heating 2 ~ 3min, at 900 ~ 950 DEG C of insulation 30 ~ 40s, by heat water-spraying's steel plate upper and lower surface of 40 ~ 60 DEG C, steel billet temperature is reduced rapidly, utilize air cooling method that steel billet temperature is reduced to less than 100 DEG C, then pickling, washing;
Once cold rolling technique: it is 75% ~ 80% that total reduction controls, and rolling rear steel plate thickness is 0.5 ~ 0.6mm;
Decarburizing annealing technique: protective atmosphere is wet 20%H 2+ 80%N 2, it is 40 ~ 60 DEG C that humidification temperature controls, at 840 ~ 880 DEG C of insulation 6 ~ 8min after 950 ~ 1050 DEG C of heating 30 ~ 40s;
Secondary cold-rolling technique: it is 40% ~ 60% that total reduction controls, and outgoing gauge is 0.23 ~ 0.30mm;
Secondary recrystallization annealing process: Control for Kiln Temperature is 950 ~ 1050 DEG C, soaking time>=30min; Protection gas is dry N 2+ H 2, H 2content is 75% ~ 100%; At N after secondary recrystallization annealing 2room temperature is as cold as soon in protective atmosphere;
MgO coating process: it is 15% ~ 25%, TiO that MgO concentration controls 2/ MgO=5% ~ 7%; Sintering temperature is 200 ~ 600 DEG C, and sintering time is 1 ~ 5min;
High temperature purification annealing process: use N 2purge furnace air, in 3 ~ 4h, be rapidly heated 1200 ~ 1210 DEG C; < 600 DEG C adopts pure N 2protection,>=600 DEG C change pure H into 2protective atmosphere; At 1200 ~ 1210 DEG C of high temperature section insulation 10 ~ 40h, carry out desulphurization reaction, controlled cooling model is come out of the stove to less than 300 DEG C.
CN201010597075.4A 2010-12-17 2010-12-17 A kind of common orientation silicon steel manufacture method of energy-saving high efficiency Active CN102534363B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010597075.4A CN102534363B (en) 2010-12-17 2010-12-17 A kind of common orientation silicon steel manufacture method of energy-saving high efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010597075.4A CN102534363B (en) 2010-12-17 2010-12-17 A kind of common orientation silicon steel manufacture method of energy-saving high efficiency

Publications (2)

Publication Number Publication Date
CN102534363A CN102534363A (en) 2012-07-04
CN102534363B true CN102534363B (en) 2015-10-07

Family

ID=46342377

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201010597075.4A Active CN102534363B (en) 2010-12-17 2010-12-17 A kind of common orientation silicon steel manufacture method of energy-saving high efficiency

Country Status (1)

Country Link
CN (1) CN102534363B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104726669B (en) * 2013-12-23 2017-04-26 鞍钢股份有限公司 Preparation method of low-iron-loss medium-frequency oriented silicon steel ultrathin belt
CN104018068B (en) * 2014-06-12 2017-01-11 国家电网公司 Method for preparing high-magnetic-induction oriented silicon steel with thickness of 0.18mm
CN104313469B (en) * 2014-09-28 2017-03-15 东北大学 A kind of Ultra-low carbon directional silicon steel and its manufacture method
CN106566982A (en) * 2016-10-26 2017-04-19 刘海华 Preparing method for air cooling steel throat pipe liner plate
CN110369500A (en) * 2019-07-09 2019-10-25 鞍钢股份有限公司 A kind of disconnected band control method of oriented silicon steel cold-rolled
CN110343830B (en) * 2019-07-09 2021-05-28 鞍钢股份有限公司 Steel strip preheating device and method for reducing strip breakage rate of oriented silicon steel strip
CN112593053A (en) * 2020-12-14 2021-04-02 海安华诚新材料有限公司 Oriented silicon steel high-temperature annealing process with low gas consumption optimization cost

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957546A (en) * 1974-09-16 1976-05-18 General Electric Company Method of producing oriented silicon-iron sheet material with boron and nitrogen additions
CN1786248A (en) * 2005-12-13 2006-06-14 武汉钢铁(集团)公司 Production method for improving electromagnetic performance and bottom layer quality of copper containing orientation silicium steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957546A (en) * 1974-09-16 1976-05-18 General Electric Company Method of producing oriented silicon-iron sheet material with boron and nitrogen additions
CN1786248A (en) * 2005-12-13 2006-06-14 武汉钢铁(集团)公司 Production method for improving electromagnetic performance and bottom layer quality of copper containing orientation silicium steel

Also Published As

Publication number Publication date
CN102534363A (en) 2012-07-04

Similar Documents

Publication Publication Date Title
CN102534363B (en) A kind of common orientation silicon steel manufacture method of energy-saving high efficiency
CN102758127B (en) Method for producing high magnetic induction orientation silicon steel with excellent magnetic performance and good bottom layer
CN101768697B (en) Method for manufacturing oriented silicon steel with one-step cold rolling method
CN100478458C (en) Production of non-directional cold-rolling silicon steel disc
CN102041440B (en) Method for producing high magnetic induction grain-oriented silicon steel
CN103255274B (en) Production method of general oriented silicon steel with twice cold rolling changed into one time cold rolling
CN100381598C (en) Orientating silicon steel, manufacturing process and equipment
CN104018068B (en) Method for preparing high-magnetic-induction oriented silicon steel with thickness of 0.18mm
CN102952931B (en) Glass-film-free oriented silicon steel manufacture method and annealing isolation agent
CN100455702C (en) Method for producing oriented silicon steel with good bottom by low-temperature heating
WO2015096430A1 (en) Method for preparing oriented high silicon electrical steel
CN102560048B (en) Preparation process of ordinary oriented silicon steel
WO2010015156A1 (en) A method of manufacturing oriented si steel containing cu
CN103882289A (en) Production method for manufacturing cold-rolled oriented silicon steel with high magnetic strength by using generally oriented steel raw material
CN103572157A (en) Production method for improving insulating property by adding trace elements in oriented silicon steel barrier-coat
CN104726667B (en) Production method of medium thin slab continuous casting and continuous rolling low-temperature oriented silicon steel
CN101845582A (en) Production method of high magnetic induction oriented silicon steel
CN103667874A (en) Production method for shortening furnace time of oriented silicon steel during high-temperature annealing period
CN106399819A (en) Oriented silicon steel and preparing method thereof
CN103882299B (en) A kind of thin specification electrical sheet of high alumina and production method thereof
CN109112395B (en) Non-bottom-layer oriented ultrathin strip base material and preparation method thereof
CN101275201B (en) Oriented electric steel plate and manufacturing method thereof
CN103031420B (en) Production method of oriented silicon steel with excellent magnetic performance
CN110218853A (en) Prepare the process of low temperature high magnetic induction grain-oriented silicon steel
CN109554525A (en) A kind of manufacturing method of mirror surface-oriented silicon steel

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