CN109161673A - The method that thin strap continuous casting preparation is orientated high silicon steel - Google Patents

The method that thin strap continuous casting preparation is orientated high silicon steel Download PDF

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CN109161673A
CN109161673A CN201811257957.9A CN201811257957A CN109161673A CN 109161673 A CN109161673 A CN 109161673A CN 201811257957 A CN201811257957 A CN 201811257957A CN 109161673 A CN109161673 A CN 109161673A
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temperature
continuous casting
high silicon
silicon steel
thin strap
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张凤泉
吴章汉
黄景文
曾春
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1227—Warm rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283—Application of a separating or insulating coating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

The invention discloses the methods that a kind of preparation of thin strap continuous casting is orientated high silicon steel, including smelting, thin strap continuous casting, multi-pass warm-rolling, water quenching quick cooling, pickling, cold rolling, apply separation layer, annealing process step, in the water quenching quick cooling step, water quenching quick cooling is carried out to 300 DEG C hereinafter, cooling velocity >=20 DEG C/s to band；The painting separation layer step applies one layer of SiO in strip surface2And Al2O3Mixed solution, and dried at a temperature of 300~450 DEG C；In the annealing process step, the band after coated and dried is rapidly heated to 900 DEG C or more, 5~10 DEG C/s of heating rate, heat preservation 30~60 minutes, then temperature is increased to 1150 DEG C~1200 DEG C, keep the temperature 8~52 hours, it is slowly cooled to room temperature, cooling velocity≤5 DEG C/s.This method is with short production cycle, lumber recovery is high, and the high silicon-steel magnetic of orientation obtained can be splendid.

Description

The method that thin strap continuous casting preparation is orientated high silicon steel
Technical field
The present invention relates to metallurgical technology, the method for being orientated high silicon steel in particular to a kind of preparation of thin strap continuous casting.
Background technique
It is well known that for Fe-Si alloy, with the increase of Si content, especially when Si content be more than after 5% it is (i.e. high Silicon steel), alloy becomes not only hard but also crisp, deteriorates processing performance sharply.But the excellent magnetic performance of high silicon steel material and extensively Application prospect, and attract people and carry out a large amount of research-and-development activity.
(1) traditional rolling mill practice
The 6.5%Si silicon of 0.3mm thickness is prepared using hot rolling-cold-rolling practice within 1966 for the first time since T.Ishizaka is equal to Since steel strip, people have been working hard exploration, and the technique for making to prepare high silicon plate is simple as far as possible, economy, strong operability, and Achieve some achievements.For Super Sendust alloy, by the thin plate of the available 0.05~0.30mm of hot rolling.Russia sieve This has developed one kind three and rolls method technique, it may be assumed that hot rolling, warm-rolling and cold rolling, temperature of the technique in fierce adjustment atomic ordered arrangement Section can destroy ordered arrangement and improvement plasticity to be greater than the intermediate warm-rolling of total amount of rolling 75%, to obtain 0.20mm thickness Thin plate；But obtaining the additional treatments that 6.5%Si high silicon steel is implemented in this way keeps technical process considerably complicated.1988, Japan Pipe Company (NKK) successfully utilizes rolling technique+CVD chemical vapour deposition technique, to 6.5% Si No yield point high silicon sheet iron Carry out commercial scale.These coiled thickness of strip are 0.1~0.5mm, and width is up to 400mm.Its resistivity ratio 3% Si silicon steel is 1 times high, and magnetostriction coefficient is approximately zero, and magnetocrystalline anisotropy constant reduces about 40%, and it is high to be widely used as high speed Frequency motor, low noise audio and high frequency transformer and converter etc..But these rolling mill practices there is no play-by-play.
(2) fast solidification technology
Fast solidification technology obtains the development advanced by leaps and bounds in metal material processing preparation in recent years.Using quick Solidifying process has achieved some achievements to the preparation of high silicon steel thin belt, and shows hope place.
1) chilling system band method
1978, N.Tsuya and K.T.Arai produced the 6.5%Si high silicon steel of 0.03~0.1mm using emergency cooling process Strip, the high ultrafine grain structure of silicon steel thin belt arouse great concern.Late comer comes to the technique 6.5%Si high silicon steel, Sendust alloy and the Fe of preparation3The various Fe such as Si3Si based alloy has carried out a large amount of research.
Certain domestic R&D institution successfully develops magnetostriction using quick setting method and is up to 82 μ close to zero and resistivity The 6.5%Si-Fe as cast condition strip in razor-thin (40~60 μm thick, wide 10~25mm) of Ω cm.But these researchs are only limited to using base Plinth research, will carry out that large-scale production is also highly difficult, reason is exactly the strip produced with this technique, thickness and width It is limited, and shape is also not fully up to expectations.
2) spray-up method
Spray deposition processing is to be related to powder metallurgy, liquid metal atomization, be quickly cooled down and nonequilibrium freezing etc. is multi-field New material technology of preparing.Its main feature is that the liquid metal molten drop through gas atomization to be deposited to the receiver of certain shapes On, it is directly prepared into the product of certain shapes.It is thick since the technology is that have the flexible manufacturing system of versatility and product diversity Spend unrestricted, shape of product is also easy to control, so it is feasible for preparing 6.5%Si high silicon steel with the method, and very It is promising.Regrettably, the report of current few this respects.
(3) CVD technique
CVD technique is the high-temperature chemical reaction between surface and silicide using traditional orientation and non-oriented silicon steel sheet It is enriched in Si on silicon steel sheet, this is to prepare Fe so far3Si based alloy protrusion and successful technique the most.This method As adverse current casting, can produce high silicon steel also can produce " gradient " steel, and can obtain what grain size can control Anisotropy and isotropic material.1988 Japan Pipe Company (NKK) successfully develop and utilize the technique, produce thickness The high silicon sheet iron of No yield point containing 6.5%Si of 0.1~0.5mm, width 400mm.By constantly practicing and studying, in July, 1993 Formally build up the continuous siliconizing producing line of CVD of 100 tons of monthly output.Produce the 6.5%Si high silicon steel of 0.1~0.3mm thickness, 600mm wide Piece.Due to the rapid development of semiconductor, electrical equipment is pushed to work at higher frequencies, and require lower iron loss, is This, NKK is in the nineteen ninety-five development and production product of 0.05mm × 600mm again.Production is significantly improved by optimizing working condition The processing performance of product, this high silicon steel plate for being named as Super E Core are mainly used for electric machinery and magnetic device aspect. Although CVD technique has been succeeded, there are the following problems: 1) depositing temperature is high, and energy consumption is high, equipment seriously corroded, the service life Shorten；2) that CVD technique is leaned on is SiCl4Fe is formed by corrosion iron surface3Si and deposit, thus can surface generate etch pit It is hollow and uneven, need warm-rolling smooth, this makes troubles to production；3) what CVD technique was leaned on is internally to soak silicon from the surface of strip, The result is that gradually decreasing from surface to central part silicone content, often surface 6.5%Si, is only 3.5%Si to central part, It is exactly gradient silicon, the product of magnetic property and full 6.5%Si differs greatly.4) FeC1 is generated by CVD technique2, exhaust gas was both serious Environment is polluted, and causes the loss of iron.
(4) related patents technology
1) Chinese patent application CN201010588874.5 discloses a kind of preparation method of oriented high-silicon-steel thin plates, work Skill includes the following steps: that the column crystal that direction growth is obtained using directional solidification mode, solidification rate are controlled in 0.6~15mm/ Min, temperature gradient control is in 60~400K/cm；Hot rolling, heating of plate blank, heating temperature are 800~1300 DEG C, then hot rolling arrives The sheet metal of 1.0~4.0mm；Hot rolled plate passes through annealing heat-treatment and pickling, and warm-rolling obtains the plate of 0.8~0.4mm；Warm-rolling Plate heat treatment, then carries out multi-pass cold rolling, then carries out secondary recrystallization annealing and the high silicon steel of orientation is made.The advantages of invention It is, is orientated using directional freeze method from material preparation source control tissue and crystal grain, and the conjunction is prepared by cold rolling process Gold orientation plate, can greatly improve the soft magnet performance of high silicon steel.The prepared thin strip cold come out has good template.
2) Chinese patent application CN201010588872.6 is disclosed a kind of prepared using directional solidification and bar plate and is orientated high silicon The method of steel flat cold-rolled sheet, this method comprises the following steps: vacuum metling mother ingot casting first, control silicone content be 4.5~ 10.0%, boron content is 50~2000ppm, remaining is iron；Then by female ingot casting refuse and directional solidification, it is raw to form direction Long columanar structure, slab thickness are 2~16mm；Zerolling, rolling temperature control are carried out directed along directional solidification direction System is between 200~950 DEG C, and plate outgoing gauge is 1.0~3.0mm, and deflection is 50~90%；Warm-rolling plate is direct through pickling Cold rolling is carried out, through multi-pass cold rolling, final plate thickness is 0.5~0.1mm.The advantage is that rolling be below recrystallization temperature into The characteristics of going, remaining original oriented freezing organization obtains orientation tissue, while process flow conducive to secondary recrystallization after cold rolling It greatly simplifies, has a extensive future.
3) Chinese patent application CN200710099130.5 discloses a kind of cold rolling preparation method of high silicon plate, thin plate Middle Fe content is that 85~96%, Si content is 4~15%, is weight ratio；Preparation method are as follows: raw material preparation, silicone content Range is 4~15%, and the content of boron is 100~5000ppm, remaining is iron；It smelts, casting；It is forged into 10~20mm's of thickness Slab；Hot rolling is to 1~2mm；Hot rolled plate heat treatment；Warm-rolling obtains the plate of 0.2~0.3mm；The heat treatment of warm-rolling plate；Cold rolling obtains With a thickness of the high silicon steel plate of 0.03~0.05mm.The advantage is that the alloy is prepared using cold rolling process, and due to the room of the material Warm brittleness, the conventional method are being considered that high silicon steel can not be prepared before.The prepared thin strip cold come out has good Plate shape, surface have metallic luster.The production technology has general applicability, at low cost；Due to the soft magnetism that high silicon steel is excellent Performance has a vast market application prospect.
4) Chinese patent application CN201010524356.7 discloses a kind of preparation method of high silicon plate, specific steps It is as follows: A, using the hot rolled silicon steel plates of any surface finish as substrate；B, the circumferential speed ratio for adjusting the upper and lower working roll of asynchronous rolling machine exists Between 1: 1.05~1: 1.35, multi- pass rolling then is carried out to the hot rolled silicon steel plates in " A " step；C, temperature be 400~ The siliconising for carrying out 0.5~15h to the thin plate of " B " step under conditions of 800 DEG C is handled；The invention has the advantages that easy to operate, energy It consumes small, at low cost；It is fine and close using the high silicon plate clean surface of invention preparation, infiltration layer.
5) Chinese patent application CN200410004404.4, which discloses a kind of gradually plasticization process and prepares iron silicon systems base, orderly closes The technology of golden thin plate, the invention provides a kind of gradually plasticization process to prepare Fe14Si2It is the technology of base ordered alloy thin plate, it is special Sign is process flow are as follows: then progress plastic metal design first is smelted, ingot casting is annealed and forged after smelting, rolls after forging System and gradually plasticization process technology, are eventually fabricated the Fe of 0.1~0.3mm14Si2It is based alloy thin plate.Specific process parameter are as follows: set The range of the silicone content of meter be 11~14% (atomic ratios), it is other plasticising alloy element total content be 0.01~2% (weight Than)；With vacuum melting furnace, it is initially charged with pure iron and silicon, trace alloying element is reloaded into before casting after fusing；950 DEG C~1200 The annealing of DEG C ingot casting and 1050 DEG C~700 DEG C are forged into slab；The gradually plasticization process technology that rolling and extraordinary heat treatment combine. The advantages of invention, is: successfully dropping low-alloyed brittle-ductile transition temperature using by gradually plasticization process, improves latten Stretching plastic.
It is to use roll, anneal, rolling in addition to CVD method in the existing technique for preparing high silicon steel described above The repetitious techniques such as system, annealing, cause the process-cycle long, and lumber recovery is low, and energy consumption is high, and optimum range is not achieved in magnetic property. There are also researchers to add the microelements such as Cu, Cr, P, B into the molten steel of Fe-6.5% (quality) Si, although can be improved Plasticity and machinability, but final finished magnetism is poor.
Summary of the invention
Present invention aim to provide a kind of method that thin strap continuous casting preparation is orientated high silicon steel, this method production cycle It is short, lumber recovery is high, the high silicon-steel magnetic of orientation obtained can be splendid.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of preparation of thin strap continuous casting is orientated the side of high silicon steel Method, including smelting, thin strap continuous casting, multi-pass warm-rolling, water quenching quick cooling, pickling, cold rolling, painting separation layer, annealing process step, it is described In water quenching quick cooling step, water quenching quick cooling is carried out to 300 DEG C hereinafter, cooling velocity >=20 DEG C/s to band；The painting separation layer step Suddenly, one layer of SiO is applied in strip surface2And Al2O3Mixed solution, and dried at a temperature of 300~450 DEG C；The annealing In step, the band after coated and dried is rapidly heated to 900 DEG C or more, 5~10 DEG C/s of heating rate, keeps the temperature 30~60 points Clock, then temperature is increased to 1150 DEG C~1200 DEG C, 8~52 hours are kept the temperature, is slowly cooled to room temperature, cooling velocity≤5 DEG C/ s。
Further, in the multi-pass warm rolling step, coagulation band enters temperature >=900 DEG C of milling train, rolls reduction ratio It is 15~95%.
Further, in the thin strap continuous casting step, pouring molten steel temperature >=1530 DEG C, inert gas shielding；Coagulation band Temperature is 1200~1350 DEG C, and coagulation band is with a thickness of 0.50~3.0mm.
Further, in the smelting step, object Ingredients Weight content is smelted are as follows: Fe content is 93~95%, Si content It is 5~7%, C content≤50PPm, other impurity content≤20PPm.
Further, in the smelting step, fusion temperature is 1530~1590 DEG C, tapping temperature >=1530 DEG C.
Further, in the cold rolling step, small reduction ratio, multi-pass cold rolling are taken, per pass reduction ratio≤25%.
Further, in the multi-pass warm rolling step, the first passage inlet temperature is 950~1100 DEG C, outlet temperature ≥900℃。
Further, in the water quenching quick cooling step, water quenching quick cooling is carried out to 35~100 DEG C to band, cooling velocity is 20~25 DEG C/s.
Further, in the annealing process step, the band after coated and dried is rapidly heated to 950~1200 DEG C, heating rate is 8~10 DEG C/s, keeps the temperature 50~60 minutes, then temperature is increased to 1180 DEG C~1200 DEG C, heat preservation 48~52 Hour, it is slowly cooled to room temperature, cooling velocity is 2~5 DEG C/s.
Compared with prior art, the invention has the following advantages that
First, being orientated high silicon steel (such as: Fe-6.5wt%Si alloy), exist from high temperature to low temperature unordered orderly to B2 by A2 The process of DO3 ordered structure transformation is arrived again, and for temperature at 750 DEG C or less, A2 disorder phase transition is B2 ordered phase, and temperature drops to again At 550 DEG C or less, B2 ordered phase is changed into DO3 ordered structure again.A2 structure is body-centered cubic, under deformation force effect usually It can show good plasticity；The Bai Shi vector ratio A2 structure of B2 structural dislocation doubles, to reduce alloy deformation The plastic deformation ability at initial stage, processing hardening is obvious, and easily leads to alloy fracture, plasticity decline.And the Bai Shi of DO3 structural dislocation Vector ratio B2 structure increases one times again, and dislocation density and the plastic deformation ability at deformation initial stage can be made further to decline, moulded Property further decrease, make deformation it is more difficult.The present inventor is studied for a long period of time discovery: being orientated high silicon steel using fast quickly cooling But method, i.e., when from 900 DEG C or so with the cooling of >=20 DEG C/s speed, the unordered phase of A2 has little time to be changed into B2 ordered phase, and B2 has Sequence mutually also has little time to change to DO3 ordered structure, most for the unordered phase of A2 and a small amount of in band when reaching 300 DEG C or less B2 ordered phase, more disordered structure can keep preferable initial room-temperature plasticity, and the cold rolling for very thin plate provides item Part.Band carries out small pressure, multi-pass cold rolling, percentage pass reduction≤25% is rolled down to finished product thickness, in band after pickling Surface applies one layer of SiO2+Al2O3Mixed solution, and moisture removal is removed in 300~450 DEG C of drying；Finally by the band after coated and dried Material is rapidly heated to 900 DEG C or more, keeps the temperature 30~60 minutes, then temperature is increased to 1150 DEG C~1200 DEG C, keeps the temperature 8~52 Hour, slowly cold fastly to room temperature, cooling velocity≤5 DEG C/s promote secondary recrystallization further perfect, optimize magnetic property.
Second, the present invention selects pure Fe-Si molten steel, other alloying elements are not added, using near-net forming method, directly By on the crystallization roll of pouring molten steel to strip casting machine, by quickly solidifying, thickness≤3.0mm high temperature coagulation band is prepared, Heavy reduction rolling is carried out in 900 DEG C or more strip temperatures, that is, is rolled in A2 phase region, the strip temperature exported such as milling train≤ At 850 DEG C, band need to be heated to 900 DEG C or more in protective gas and rolled again, roll all needs to guarantee finish to gauge per pass Temperature is at 900 DEG C or more；It is to be rolled to required thickness when, carry out fast quenching and be cooled to 300 DEG C hereinafter, i.e. >=20 DEG C/s speed cools down, Through pickling, multi-pass cold rolling, separation layer, the annealing of high temperature secondary recrystallization are applied, the good high silicon steel of orientation of magnetic property is made.
Third, the present invention selects pure Fe-Si to be orientated high silicon steel ingredient, other alloying components are not added, have saved alloy Cost reduces smelting difficulty.
Fourth, the present invention uses thin strap continuous casting, molten steel can directly be prepared to the strip of 0.50~3.0mm, rolled with tradition Technique processed is compared, and production process is reduced, and is reduced costs, and lumber recovery is substantially increased.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below, convenient for more clearly understanding the present invention, But limiting the invention for they.
Embodiment 1
1) smelt: smelt in 50Kg vacuum drying oven, ingredient: Fe content is that 93~94%, Si content is 6~7%, C content ≤ 30PPm, other impurity are containing≤10PPm；Smelting temperature: 1530~1590 DEG C；Tapping temperature is 1560 DEG C；
2) thin strap continuous casting: thin strap continuous casting carries out under protection of argon gas, and the pouring molten steel temperature of strip casting machine is 1550 DEG C； The temperature of coagulation band is 1280~1300 DEG C；Solidify tape thickness × width: 2.0 × 252mm；
3) it rolls, takes out and be sent into mill milling, 950~1100 DEG C of inlet temperature, 2.0 → 1.5mm of thickness, outlet temperature 900 DEG C or more；Next passes, 900 DEG C of inlet temperature (since roll is under cold state, Temperature fall when rolling strip), 850 DEG C of outlet temperature, 1.5 → 1.1mm of thickness；
4) it reheats, with 7)；
5) it rolls again, 1050~1080 DEG C of inlet temperature, 1.1 → 0.8mm of thickness, 890 DEG C of outlet temperature；
6) it reheats, with 7)；
7) it rolls again, 1050~1080 DEG C of inlet temperature, 0.8 → 0.5mm of thickness, 880 DEG C of outlet temperature；
8) fast quenching is cooling, band is put into circulating water chennel water quenching cooling to 35 DEG C, 25 DEG C/s of cooling velocity.
9) pickling；
10) small pressure, multi-pass cold rolling are taken, reduction ratio is not more than 25% per pass, thick until rolling required finished product Degree.Rolling schedule: 0.50 → 0.40 → 0.32 → 0.26 → 0.20 → 0.15；
11) it applies barrier coat: applying one layer of SiO in strip surface2+Al2O3Mixed solution, and dried at 300~450 DEG C Remove moisture removal；
12) band after coated and dried is rapidly heated to 900 DEG C or more, keeps the temperature 30~60 minutes, then temperature is increased To 1150 DEG C~1200 DEG C, 31~42 hours are kept the temperature, slowly cold fastly to room temperature, cooling velocity≤5 DEG C/s, promotion is secondary to tie again It is brilliant further perfect, optimize magnetic property.
Magnetic Measurement result is as follows: magnetic hysteresis coefficient of dilatation λ=0.2 × 106, magnetic induction density B800=1.76T, iron loss P1.0/400=5.25W/kg.
Embodiment 2
1) smelt: smelt in 50Kg vacuum drying oven, ingredient: Fe content is that 93~94%, Si content is 6~7%, C content ≤ 30PPm, other impurity are containing≤50PPm；Smelting temperature: 1530~1590 DEG C；Tapping temperature: 1560 DEG C；
2) thin strap continuous casting: thin strap continuous casting carries out under protection of argon gas, the pouring molten steel temperature of strip casting machine: 1550 DEG C； The temperature of coagulation band is 1280~1300 DEG C；Solidify tape thickness × width: 1.8 × 252mm；
3) it rolls, takes out and be sent into mill milling, 950~1100 DEG C of inlet temperature, 1.8 → 1.3mm of thickness, outlet temperature 900 DEG C or more；Next passes, 900 DEG C of inlet temperature (since roll is under cold state, Temperature fall when rolling strip), 850 DEG C of outlet temperature, 1.3 → 1.0mm of thickness；
4) it reheats, with 7)；
5) it rolls again, 1050~1080 DEG C of inlet temperature, 1.0 → 0.7mm of thickness, 890 DEG C of outlet temperature；
6) it reheats, with 7)；
7) it rolls again, 1050~1080 DEG C of inlet temperature, 0.7 → 0.5mm of thickness, 880 DEG C of outlet temperature；
8) it reheats, with 7)；
9) it rolls again, 1050~1080 DEG C of inlet temperature, 0.5 → 0.3mm of thickness, 880 DEG C of outlet temperature；
10) fast quenching is cooling, band is put into circulating water chennel water quenching cooling to 35 DEG C, 25 DEG C/s of cooling velocity；
11) pickling；
12) small pressure, multi-pass cold rolling are taken, reduction ratio is not more than 25% per pass, thick until rolling required finished product Degree.Rolling schedule: 0.30 → 0.26 → 0.20 → 0.15；
13) it applies barrier coat: applying one layer of SiO in strip surface2+Al2O3Mixed solution, and dried at 300~450 DEG C Remove moisture removal；
14) band after coated and dried is rapidly heated to 900 DEG C or more, keeps the temperature 30~60 minutes, then temperature is increased To 1150 DEG C~1200 DEG C, 34~52 hours are kept the temperature, slowly cold fastly to room temperature, cooling velocity≤5 DEG C/s, promotion is secondary to tie again It is brilliant further perfect, optimize magnetic property.
Magnetic Measurement result is as follows: magnetic hysteresis coefficient of dilatation λ=0.2 × 106, magnetic induction density B800=1.76T, iron loss P1.0/400=5.54W/kg.
Embodiment 3
1) smelt: smelt in 50Kg vacuum drying oven, ingredient: Fe content is that 93~94%, Si content is 6~7%, C content ≤ 30PPm, other impurity are containing≤100PPm；Smelting temperature: 1530~1590 DEG C；Tapping temperature: 1560 DEG C；
2) thin strap continuous casting: thin strap continuous casting carries out under protection of argon gas, the pouring molten steel temperature of strip casting machine: 1550 DEG C； The temperature of coagulation band is 1280~1300 DEG C；Solidify tape thickness × width: 2.1 × 252mm；
3) it rolls, takes out and be sent into mill milling, 950~1100 DEG C of inlet temperature, 2.1 → 1.5mm of thickness, outlet temperature 900 DEG C or more；Next passes, 900 DEG C of inlet temperature (since roll is under cold state, Temperature fall when rolling strip), 850 DEG C of outlet temperature, 1.5 → 1.1mm of thickness；
4) it reheats, with 7)；
5) it rolls again, 1050~1080 DEG C of inlet temperature, 1.1 → 0.8mm of thickness, 890 DEG C of outlet temperature；
6) it reheats, with 7)；
7) it rolls again, 1050~1080 DEG C of inlet temperature, 0.8 → 0.5mm of thickness, 880 DEG C of outlet temperature；
8) fast quenching is cooling, band is put into circulating water chennel water quenching cooling to 35 DEG C, 25 DEG C/s of cooling velocity；
9) pickling；
10) small pressure, multi-pass cold rolling are taken, reduction ratio is not more than 25% per pass, thick until rolling required finished product Degree.Rolling schedule: 0.50 → 0.40 → 0.32 → 0.26 → 0.20 → 0.15；
11) it applies barrier coat: applying one layer of SiO in strip surface2+Al2O3Mixed solution, and dried at 300~450 DEG C Remove moisture removal；
12) band after coated and dried is rapidly heated to 900 DEG C or more, keeps the temperature 30~60 minutes, then temperature is increased To 1150 DEG C~1200 DEG C, 48~52 hours are kept the temperature, slowly cold fastly to room temperature, cooling velocity≤5 DEG C/s, promotion is secondary to tie again It is brilliant further perfect, optimize magnetic property；
Magnetic Measurement result is as follows: magnetic hysteresis coefficient of dilatation λ=0.2 × 106, magnetic induction density B800=1.75T, iron loss P1.0/400=5.66W/kg.
Embodiment 4
1) smelt: smelt in 50Kg vacuum drying oven, ingredient: Fe content is that 93~94%, Si content is 6~7%, C content ≤ 30PPm, other impurity are containing≤50PPm；Smelting temperature: 1530~1590 DEG C；Tapping temperature: 1560 DEG C；
2) thin strap continuous casting: thin strap continuous casting carries out under protection of argon gas, the pouring molten steel temperature of strip casting machine: 1550 DEG C； The temperature of coagulation band is 1280~1300 DEG C；Solidify tape thickness × width: 1.8 × 252mm；
3) it rolls, takes out and be sent into mill milling, 950~1100 DEG C of inlet temperature, 1.8 → 1.3mm of thickness, outlet temperature 900 DEG C or more；Next passes, 900 DEG C of inlet temperature (since roll is under cold state, Temperature fall when rolling strip), 850 DEG C of outlet temperature, 1.3 → 1.0mm of thickness；
4) it reheats, with 7)；
5) it rolls again, 1050~1080 DEG C of inlet temperature, 1.0 → 0.7mm of thickness, 890 DEG C of outlet temperature；
6) it reheats, with 7)；
7) it rolls again, 1050~1080 DEG C of inlet temperature, 0.7 → 0.5mm of thickness, 880 DEG C of outlet temperature；
8) it reheats, with 7)；
9) it rolls again, 1050~1080 DEG C of inlet temperature, 0.5 → 0.3mm of thickness, 880 DEG C of outlet temperature；
10) fast quenching is cooling, band is put into circulating water chennel water quenching cooling to 35 DEG C, 25 DEG C/s of cooling velocity；
11) pickling；
12) small pressure, multi-pass cold rolling are taken, reduction ratio is not more than 25% per pass, thick until rolling required finished product Degree.Rolling schedule: 0.30 → 0.26 → 0.20 → 0.15；
13) it applies barrier coat: applying one layer of SiO in strip surface2+Al2O3Mixed solution, and dried at 300~450 DEG C Remove moisture removal；
14) band after coated and dried is rapidly heated to 900 DEG C or more, keeps the temperature 50~60 minutes, then temperature is increased To 1150 DEG C~1200 DEG C, 48~52 hours are kept the temperature, are slowly cooled to room temperature, cooling velocity≤5 DEG C/s, promotion is secondary to tie again It is brilliant further perfect, optimize magnetic property.
Magnetic Measurement result is as follows: magnetic hysteresis coefficient of dilatation λ=0.2 × 106, magnetic induction density B800=1.77T, iron loss P1.0/400=5.43W/kg, best performance.

Claims (9)

1. a kind of method that thin strap continuous casting preparation is orientated high silicon steel, it is characterised in that: including smelting, thin strap continuous casting, multi-pass temperature It rolls, water quenching quick cooling, pickling, cold rolling, painting separation layer, annealing process step, in the water quenching quick cooling step, water quenching is carried out to band It is cooled to 300 DEG C fastly hereinafter, cooling velocity >=20 DEG C/s；The painting separation layer step applies one layer of SiO in strip surface2With Al2O3Mixed solution, and dried at a temperature of 300~450 DEG C；It is in the annealing process step, the band after coated and dried is fast Speed is warming up to 900 DEG C or more, and heating rate is 5~10 DEG C/s, keeps the temperature 30~60 minutes, then by temperature be increased to 1150 DEG C~ 1200 DEG C, 8~52 hours are kept the temperature, is slowly cooled to room temperature, cooling velocity≤5 DEG C/s.
2. the method that thin strap continuous casting preparation is orientated high silicon steel according to claim 1, it is characterised in that: the multi-pass warm-rolling In step, coagulation band enters temperature >=900 DEG C of milling train, and rolling reduction ratio is 15~95%.
3. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the strip connects It casts in step, pouring molten steel temperature >=1530 DEG C, inert gas shielding；Coagulation band temperature is 1200~1350 DEG C, and coagulation band is thick Degree is 0.50~3.0mm.
4. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the smelting step In rapid, object Ingredients Weight content is smelted are as follows: Fe content is that 93~95%, Si content is 5~7%, and C content≤50PPm is other miscellaneous Matter content≤20PPm.
5. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the smelting step In rapid, fusion temperature is 1530~1590 DEG C, tapping temperature >=1530 DEG C.
6. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the cold rolling step In rapid, small reduction ratio, multi-pass cold rolling are taken, per pass reduction ratio≤25%.
7. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the multi-pass In warm rolling step, the first passage inlet temperature is 950~1100 DEG C, outlet temperature >=900 DEG C.
8. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: the water quenching is fast In cold step, water quenching quick cooling is carried out to 35~100 DEG C to band, cooling velocity is 20~25 DEG C/s.
9. the method that thin strap continuous casting preparation according to claim 1 or claim 2 is orientated high silicon steel, it is characterised in that: at the annealing It manages in step, the band after coated and dried is rapidly heated to 950~1200 DEG C, heating rate is 8~10 DEG C/s, heat preservation 50~ 60 minutes, then temperature is increased to 1180 DEG C~1200 DEG C, 48~52 hours are kept the temperature, is slowly cooled to room temperature, cooling velocity 2 ~5 DEG C/s.
CN201811257957.9A 2018-10-26 2018-10-26 The method that thin strap continuous casting preparation is orientated high silicon steel Pending CN109161673A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120233A (en) * 2014-07-02 2014-10-29 东北大学 Method of rolling to prepare oriented high-silicon steel plate
CN104831036A (en) * 2015-04-17 2015-08-12 武汉钢铁(集团)公司 Preparation method of Fe-6.5%Si through thin-strip casting, high-temperature rolling and quick quenching process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104120233A (en) * 2014-07-02 2014-10-29 东北大学 Method of rolling to prepare oriented high-silicon steel plate
CN104831036A (en) * 2015-04-17 2015-08-12 武汉钢铁(集团)公司 Preparation method of Fe-6.5%Si through thin-strip casting, high-temperature rolling and quick quenching process

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