CN106480283A - A kind of production method of high-silicon high aluminium non-oriented electrical steel strip - Google Patents

Abstract

The present invention provides a kind of production method of high-silicon high aluminium non-oriented electrical steel strip, raw material hot rolled coil sial content is 2.5～4.0%, and penetration enhancer ferrosilicon, two kinds of powder accountings of ferro-aluminum are 80～94wt%, silicon iron powder Si >=15%, ferro-aluminum powders A l >=5%, 60 mesh of penetration enhancer granularity ＞；Filler iron powder 2～10wt% of accounting；Adhesive paraffin wax, sal-ammoniac accounting are 2～10wt%, 50～200 DEG C of drying；Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 2～5mm under pressure；100～250 DEG C of charging temperature of heat treatment, 50～150 DEG C/h of programming rate, supply voltage >=10V, source current >=1A, it is heat-treated holding temperature >=650 DEG C, 2～6h of temperature retention time.The cold rolling lumber recovery of the present invention is high, and simple to operate, low cost, technique are easily controllable, and operating efficiency is high, and alternative hot rolled coil normalizing treatment technique realizes the non-directional high-silicon high aluminium electrical sheet of industrialized production, and processing characteristics is excellent.

Description

A kind of production method of high-silicon high aluminium non-oriented electrical steel strip

Technical field

The invention belongs to steel rolling process technical field, more particularly to a kind of base main body alloying component gradient distribution, containing Si3.3～ 5.5%th, the production method of the high-silicon high aluminium non-oriented electrical steel strip of Al0.5～2.0%.

Background technology

Electrical sheet is important soft magnetism functional material, and with the raising of silicone content, the electromagnetic conversion carrier of manufacture has higher leading Magnetic characteristic and relatively low loss, and magnetostriction coefficient reduction, are conducive to stablizing safe operation.In electrician's steel matrix, silicon contains Amount reaches 6.5% and can obtain optimal combination property, but in industrial production, because of the fragility that silico-aluminum is caused, sial content in theory Reaching 4% or so just cannot carry out cold working, it is impossible to realize industrialized production.For the non-directional high-grade electrician of specific use Steel material often carries out high-aluminium alloy, gas phase siliconising according to demand or carries out small-scale production using technology such as amorphous rapid cooling castings.

Content of the invention

The present invention provides the production method that a kind of pressed powder sial co-permeation method produces high-silicon high aluminium non-oriented electrical steel strip, its Purpose is to be easy to operation, it is easy to control, reduces cost, improves operating efficiency, realizes industrialized production, obtains high property Can high silicon steel soft magnetic materials.

For this purpose, this invention takes following technical solution：

A kind of production method of high-silicon high aluminium non-oriented electrical steel strip, it is characterised in that base main body alloying component gradient is distributed, Production method containing Si3.3～5.5%, the cold rolling high-silicon high aluminium non-oriented electrical steel strip of Al0.5～2.0% is：

Technological process

High grade non-oriented hot rolled strip → uncoiling → powder double-face spray painting → conductive plate synchronization uncoiling covering → smooth pressing → batch → steel band accesses dc source → heat-treatment furnace heating and thermal insulation → come out of the stove → uncoiling by steel band and conductive plate for negative electrode Separation → steel strip surface cleaning → conventional cold rolling and heat treatment → coating → shearing → packaging；

Capital equipment and technological parameter

Raw material：Hot rolled coil sial content is 2.5～4.0%, and surface finishing, cleaning carry out chemical polishing；

Penetration enhancer：Ferrosilicon, two kinds of powder accountings of ferro-aluminum are 80～94wt%, silicon iron powder silicone content >=15%, ferro-aluminum Al powder Content >=5%, 60 mesh of penetration enhancer granularity ＞；

Filler is iron powder, 2～10wt% of accounting；Adhesive adopts paraffin wax, sal-ammoniac, and accounting is 2～10wt%, 50～ 200 DEG C of drying；

Conductive plate：Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 2～5mm under pressure；

Power supply：Tunable voltage dc power supply；

Heat-treatment furnace：100～250 DEG C of charging temperature, 50～150 DEG C/h of programming rate, supply voltage >=10V, power supply electricity Stream >=1A, is heat-treated holding temperature >=650 DEG C, 2～6h of temperature retention time.

The know-why of the present invention is：

1st, it is difficult to for crackle of the high grade cold rolling non-oriented electrical sheet hot rolled coil in cold-rolled process, broken belt etc. cold worked Characteristic, takes the hot rolled coil to relatively low alloying component to carry out silico-aluminum permeation, and steel band section composition assumes gradient distribution, Both bulk alloy content had been improved, had improve cold-forming property again, and lumber recovery index had been improved, and obtains excellent electricity Magnetic property.

2nd, silico-aluminum co-penetration technology replaces the normalizing operation (or preanneal process) of hot rolled strip in conventional production, technique Key control point it is critical only that the grasp of siliconising aluminizing technology and the control of infiltration layer.Mainly take in steel band heat treatment process, Fulfiling the DC electric field that applies certain voltage between the conductive plate of setting, siliceous penetration enhancer containing aluminium powder, hot rolled strip ahead of schedule Afterwards, the activated silica of generation, aluminium atom are electrically charged, and promote, to substrate surface orientation diffusion, to form sial in substrate section Component gradient；Degree simultaneously improves hot rolled plate institutional framework.

3rd, the hot rolled strip through siliconising aluminising completes conventional cold rolling and finished product Technology for Heating Processing, obtains excellent electromagnetic property And excellent processing characteristics.

Beneficial effects of the present invention are：

The present invention can realize the non-directional high-silicon high aluminium electrical steel product of industrialized production (3.3～5.5% silicone contents, 0.5～ 2.0% aluminium content), cold rolling lumber recovery reaches 82.93%, and simple to operate, low cost, technique are easily controllable, and operating efficiency is high, Alternative hot rolled coil normalizing treatment technique, produces non-directional high-grade electrical sheet material, and processing characteristics is excellent, by 100 × 100mm magnetic conductivity is tested, and it is 1.56W/kg that its saturated pole intensity reaches 1.87T, P10/50 for 0.79W/kg, P15/50, Electromagnetic core suitable for various high-efficiency and precision motors and electrical equipment, instrument etc. is manufactured.

Specific embodiment

The technological process of production of the present invention is：High grade non-oriented hot rolled strip → uncoiling → powder double-face spray painting → conductive plate Synchronous uncoiling covering → smooth pressing → batch → steel band accesses dc source → heat-treatment furnace heating and thermal insulation → come out of the stove for negative electrode Steel band is separated → steel strip surface cleaning → conventional cold rolling and heat treatment → coating → shearing → bag by → uncoiling with conductive plate Dress.Chemical composition content involved in the present invention is mass percentage content.

Embodiment 1：

Hot rolled strip chemical composition wt%：C：0.003%, Si：2.15%, Al：0.40%, Mn:0.32%, P：0.012%, S：0.0020%, N：0.0025%, remaining is Fe and inevitable residual elements.

Substrate size：0.35mm×120mm×300mm.

100 mesh of silicon iron powder granularity, silicone content 50%, silicon iron powder account for penetration enhancer ratio 55wt%；80 mesh of ferro-aluminum powder size, Aluminium content 25%, ferro-aluminum powder account for penetration enhancer ratio 25wt%；100 mesh of pure iron Powder Particle Size accounts for 10wt%；Paraffin wax powder 7wt%； Sal-ammoniac 3wt%；80 DEG C of drying are mixed.

Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 3mm under pressure.

120 DEG C of charging temperature, programming rate 90/h, 750 DEG C of holding temperature, 100% dry hydrogen of protective atmosphere, connect during insulation Power supply, voltage control 60V, current control 3A, energising temperature retention time 2.1h.

Cold rolling lumber recovery 83.55%；950 DEG C of finished product continuous annealing soaking temperature, speed of service 75m/min, coating.

Siliconising aluminium metacoxal plate silicone content is 3.4%, and aluminium content is 0.8%, is tested by 100 × 100mm magnetic conductivity：Saturation magnetic Polarization intensity 1.93T, it is 1.65W/kg that P10/50 is 0.94W/kg, P15/50.

Embodiment 2：

Hot rolled strip chemical composition wt%：C：0.002%, Si：3.25%, Al：0.72%, Mn:0.18%, P：0.010%, S：0.0021%, N：0.0023%, remaining is Fe and inevitable residual elements.Thickness of strips is 2.2mm.

Substrate size：0.35mm×120mm×300mm；

100 mesh of silicon iron powder granularity, silicone content 75%, silicon iron powder account for penetration enhancer ratio 60wt%；100 mesh of ferro-aluminum powder size, Aluminium content 25%, ferro-aluminum powder account for penetration enhancer ratio 30wt%；100 mesh of pure iron Powder Particle Size accounts for 5wt%；Paraffin wax powder 3wt%；Chlorination Ammonia 2wt%；110 DEG C of drying are mixed.

Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 4mm under pressure.

150 DEG C of charging temperature, 100 DEG C/h of programming rate, 900 DEG C of holding temperature, 100% dry hydrogen of protective atmosphere, during insulation Switch on power, voltage controls 50V, current control 5A, insulation and conduction time 5h.

Cold rolling lumber recovery 82.31%；950 DEG C of finished product continuous annealing soaking temperature, speed of service 75m/min, coating.

Siliconising aluminium metacoxal plate silicone content is 3.8%, and aluminium content is 1.1%, is tested by 100 × 100mm magnetic conductivity：Saturation magnetic Polarization intensity 1.91T, it is 1.59W/kg that P10/50 is 0.83W/kg, P15/50.

Embodiment 3：

Hot-rolled substrate steel band chemical composition wt%：C：0.0025%, Si：4.0%, Al：0.90%, Mn:0.33%, P：0.015%, S：0.0030%, N：0.0019%, remaining is Fe and inevitable residual elements.

Substrate size：0.35mm×120mm×300mm；

160 mesh of silicon iron powder granularity, silicone content 60%, silicon iron powder account for penetration enhancer ratio 65wt%；150 mesh of ferro-aluminum powder size, Aluminium content 25%, ferro-aluminum powder account for penetration enhancer ratio 24wt%；100 mesh of pure iron Powder Particle Size accounts for 6wt%；Paraffin wax powder 3wt%；Sal-ammoniac 2wt%；190 DEG C of drying are mixed.

Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 5mm under pressure.

210 DEG C of charging temperature, programming rate 130/h, 680 DEG C of holding temperature, 100% dry hydrogen of protective atmosphere, connect during insulation Energising source, voltage control 45V, current control 2A, energising temperature retention time 3.5h.

Siliconising aluminium metacoxal plate silicone content is 4.8%, and aluminium content is 1.3%, is tested by 100 × 100mm magnetic conductivity：Saturation magnetic Polarization intensity 1.78T, it is 1.45W/kg that P10/50 is 0.60W/kg, P15/50.

Claims (1)

1. a kind of production method of high-silicon high aluminium non-oriented electrical steel strip, it is characterised in that base main body is closed Golden component gradient is distributed, contains Si 3.3～5.5%, the cold rolling high-silicon high aluminium No yield point electrician of Al 0.5～2.0% The production method of steel band is：

Technological process

High grade non-oriented hot rolled strip → uncoiling → powder double-face spray painting → conductive plate synchronization uncoiling is covered → smooth pressing → batch → steel band for negative electrode access dc source → heat-treatment furnace heating and thermal insulation → come out of the stove → Steel band separated by uncoiling with conductive plate → and steel strip surface cleaning → conventional cold rolling and heat treatment → coating → cut Cut → pack；

Capital equipment and technological parameter

Raw material：Hot rolled coil sial content is 2.5～4.0%, and surface finishing, cleaning carry out chemical polishing；

Penetration enhancer：Ferrosilicon, two kinds of powder accountings of ferro-aluminum are 80～94wt%, silicon iron powder silicone content >=15%, Ferro-aluminum powder aluminium content >=5%, 60 mesh of penetration enhancer granularity ＞；

Filler is iron powder, 2～10wt% of accounting；Adhesive adopts paraffin wax, sal-ammoniac, and accounting is 2～ 10wt%, 50～200 DEG C of drying；

Conductive plate：Conductive plate is heat-resisting alloy strip, and coating thickness is in 2N/mm²It is 2～5mm under pressure；

Power supply：Tunable voltage dc power supply；

Heat-treatment furnace：100～250 DEG C of charging temperature, 50～150 DEG C/h of programming rate, supply voltage >= 10V, source current >=1A, it is heat-treated holding temperature >=650 DEG C, 2～6h of temperature retention time.