CN107900345A - A kind of Powder hot isostatic pressure manufacture method of high silicon steel thin belt material - Google Patents
A kind of Powder hot isostatic pressure manufacture method of high silicon steel thin belt material Download PDFInfo
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- CN107900345A CN107900345A CN201711367261.7A CN201711367261A CN107900345A CN 107900345 A CN107900345 A CN 107900345A CN 201711367261 A CN201711367261 A CN 201711367261A CN 107900345 A CN107900345 A CN 107900345A
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- 238000000034 method Methods 0.000 title claims abstract description 37
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- 239000000463 material Substances 0.000 title claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 64
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- 238000005275 alloying Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 10
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- 229910017082 Fe-Si Inorganic materials 0.000 claims description 8
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
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- 238000000280 densification Methods 0.000 claims description 4
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- 229910000676 Si alloy Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
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- 239000010431 corundum Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
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- 238000004321 preservation Methods 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
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- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910005331 FeSi2 Inorganic materials 0.000 description 2
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- 229910006585 β-FeSi Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
A kind of method that Powder hot isostatic pressure prepares single-phase Fe 6.5%Si silicon steel, for the present invention using reduction Fe powder, Si contents are 70~80% high purity ferrosilicon powder raw material, form Fe Si mixed powders.Add bonding agent and dispersant is uniform, then soft iron jacket is used, in 1070~1170 DEG C of temperature ranges, under the high temperature insostatic pressing (HIP) effect of 100~200MPa, obtain the pressed compact of even compact, by the high Si phase compositions of the α Fe crystal grain and brittleness of poor Si, there is plastic deformation ability, green density reaches 6.75~7.07g/cm3.Sintered by multiple cold rolling, low temperature diffusion, density rise, thickness are reduced；Finally sintered in 1270~1340 DEG C of temperature ranges, the homogeneous alloy of high silicon steel is realized with the help of thermal diffusion, obtain 0.1~0.5mm thickness containing 4.5~6.7%Si, density >=7.25g/cm3High silicon steel band.
Description
Technical field
Preparation and manufacture field the invention belongs to metal material, and in particular to the Powder hot isostatic pressure of high silicon steel thin belt material
With the method for rolling deformation.
Technical background
Remanent magnetism and coercive force all very littles of soft magnetic material, i.e. hysteresis curve is very narrow, it and fundamental magnetization curve are almost
Overlap, be mainly used for the iron core of inductance coil, transformer, relay and motor.Fe-Si alloys maximum permeability is sent out with Si contents
Changing, respectively Si mass percent it is (the same below) for 2% and 6.5% nearby there is the peak of two maximum permeabilities
Value, respectively reaches 10000 and 25000.The maximum permeability of Fe-Si alloys does not have absolute predominance, such as slope in soft magnetic materials
The maximum permeability of alloy can not reach 200000.But the Fe-Si lattens of Si ＜ 4.5% manufacture cost is low, therefore
Silicon steel sheet is also known as electrical sheet or silicon steel thin slice, is a kind of very important magnetic material.
And Si>When 4.5%, below 540 DEG C of temperature B can occur for Fe-Si alloys2The eutectoid decomposition reaction of ordered phase, it is raw
Into the unordered phases of α-Fe and DO3Ordered phase so that alloy becomes fragile and is difficult to deform.
For iron Si system alloy of the Si contents between 4.5~6.7%, commonly referred to as high silicon steel, wherein silicone content 6.5%
High silicon steel it is mostly important.Its reason is Fe-Si alloy grains edge<100>The magnetostriction coefficient in direction is with the increase of Si contents
And reduce, disappear substantially at about 6.3%, and<111>The magnetostriction coefficient in direction increases and increases with Si contents, about
When 6.1% with<100>The magnetostriction coefficient in direction is equal so that high silicon steel shows excellent low in higher frequency operation
Iron loss characteristic.
The transformer of normal operation can occur continuous uniform " drone " sound, this is because alternating current by transformer around
Group when, in the core between generate periodically variable alternating flux, cause iron core magnetostriction and shake the sound sent.Greatly
The sound that amount or large-scale iron core are sent in vibrations not only causes the loss of energy, also creates noise pollution.Especially
It is to play particularly important role in the military aviation such as spacecraft, submarine and guided missile field, Fe-Si systems alloy.20th century 60
Age Mo, the alloy of Si contents 6.5% are appeared on No. 11 airships of Apollo as transformer material, are completed the mankind and are landed on the moon first
Heroic undertaking.As it can be seen that high silicon steel is the environment-friendly type soft magnetic materials of a kind of consumption reduction of function admirable, noise reduction.
Compared to other alloys, the research and development process of high silicon steel is relatively very long.Late 1920s
A.Schulze studies discovery first, and the iron Si system alloy of silicone content 6.5% has the almost nil characteristic of magnetostriction coefficient.
In the 1980s, professor K.I.Arail etc. has found the high silicon steel alloy low compared to traditional Si content in exchange dynamic magnetic field
In there is the magnetic conductivity of lower iron loss and higher.Hereafter between many decades, in order to overcome the brittleness of high silicon steel, in technology of preparing side
There are many trials in face.As the special rolled method of jacket or temperature control, rapid solidification method, chemical vapour deposition technique (CVD method),
Plasma chemical vapor deposition (PCVD methods), hot dipping ooze a diffusion annealing method, powder metallurgic method, microalloying and are modified
Etc. various methods.
Wherein CVD is the successful example of comparison.NKK companies of Japan in 1988 have produced thickness for the first time using CVD technology
It is the No yield point 6.5%Si steel discs of 400mm to spend for 0.1~0.5mm, width.Phase early 1990s, global first commercialization
Can realize that the CVD production lines of continuous siliconising are developed, the product size of production can reach 0.1~0.3mm ×
600mm。
The principle of CVD is：Under specific temperature conditions, silicon-containing gas (SiCl4) can react generation Fe- with silicon strip
Si compounds, and alloy is reached required content to alloy diffusion inside by elevated furnace temperature.Although oneself uses this
Technology realizes small-scale industrialized production, but its scale and yield all can not much meet the need in international soft magnetic materials market
Ask, and this preparation method technical process is sufficiently complex, energy consumption and of high cost, operating environment and its severe, it is impossible to meet ring
Guaranteed request.
High silicon steel is " the steel art work ", its technology of preparing is all always and everywhere state-of-the-art steel and iron manufacturing technology, and
It is the hot spot of development and exploitation.For 6.5%Si high silicon steel, its excellent magnetic performance and wide application prospect are even more to inhale
Draw scientific worker and carry out substantial amounts of research-and-development activity.The development of preparation process and ripe and can be cost-effectively
Production, is that 6.5%Si high silicon steel move towards to be commercialized widely applied key, also the always emphasis of research work.Once grope
Go out simple, economic, effective, ripe preparation process, will just produce huge economic benefit and social benefit.
The content of the invention
The object of the present invention is to provide a kind of Powder hot isostatic pressure manufacture method of high silicon steel thin belt material, for Fe-4.5~
6.7%Si alloy thin band materials be difficult to shaping the problem of, using reduce Fe powder with it is equal as 70~80% HIGH-PURITY SILICON iron powder with Si contents
Even mixing, using high temperature insostatic pressing (HIP) hot mastication effect and pressure it is uniform the characteristics of, prepare highdensity uniformity slab, and
Partially-alloyed, the α-Fe crystal grain and the high Si phases of brittleness of poor Si of the formation with plastic deformation ability are realized under thermal diffusion effect
Heterogeneous structure.Subsequently further it is thinned after multi-pass cold rolling-sintering, is finally sintered using High temperature diffusion and obtain homogeneous list
Mutually high silicon steel band.
The present invention is achieved by the following technical solutions：Using the reduction Fe powder of irregular pattern, fine Si contents
It is raw material for 70~80% HIGH-PURITY SILICON iron powder, forms Fe-4.5~6.7%Si mixed powders.Add a small amount of bonding agent, disperse
It is uniformly mixed after agent, then using soft iron jacket, in 1070~1170 DEG C of temperature ranges, the high temperature insostatic pressing (HIP) of 100~200MPa
Under effect, pressed compact uniformly, fine and close is obtained.Green density reaches 6.75~7.07g/cm3.Heat effect and pressure in high temperature insostatic pressing (HIP)
Under power effect, Fe powder particles obtain metallurgical binding, and Si elements are there occurs incomplete diffusion, formed densification, have
The heterogeneous structure of the high Si phases of α-Fe crystal grain and brittleness of the poor Si of plastic deformation ability.Burnt subsequently through multiple cold rolling, low temperature diffusion
Knot, the density rise of slab, plate thickness are reduced, and the alloying level of Si is also continuously improved.Finally in 1270~1340 DEG C of temperature
In the range of vacuum or protection of reducing atmosphere sintering, the homogeneous alloy of high silicon steel is realized with the help of thermal diffusion, obtains and contains 4.5
0.1~0.5mm of~6.7%Si is thick, density >=7.25g/cm3High silicon steel band.
The method of the present invention specifically comprises the following steps：
(1) raw material powder prepares
Using -100 mesh reduced iron powders, Fe >=98.5% in reduced iron powder, remaining is Si, Mn, P, S and other are inevitable
Impurity, use the Si contents of refining for 70~80% HIGH-PURITY SILICON iron powder, with the ferrosilicon powder of particle diameter≤10 μm, this ferrosilicon powder
In addition to containing 70~80%Si, major impurity is~0.25%Al ,~0.08%Ca and~0.02%C, remaining is Fe.
Reduced iron powder is a kind of widely used Industrial iron powder, has irregular porous pattern, micro- beneficial to storing, adhering to
Fine silica powder, and during follow-up Powder hot isostatic pressure also being mutually twisted for powder easy to implement and improve the intensity of pressed compact.
Fe-70~80%Si high purity ferrosilicons are in process of setting in addition to primary silicon crystal grain, and at 1207 DEG C, there are eutectic
Reaction, forms the β-FeSi with tP3 structures2It is very crisp with Si phase eutectic structures, this tissue, it is easy to pass through Mechanical Crushing
Technique refines.Fe-70~80%Si high purity ferrosilicons are crushed to≤10 μm of ferrosilicon powder, the Si phases in its actual tissue, FeSi2
It is mutually more tiny, be conducive to the thermal diffusion homogenization of Si elements during subsequent high temperature sintering, it is single-phase to form homogeneous Fe-4.5~6.7%Si
Alloy.Meanwhile 20~30%Fe present in powder can effectively reduce the degree of oxidation of Si, be conducive to improve the production of high silicon steel
Quality.
By Fe-70~80%Si high purity ferrosilicons Mechanical Crushing to particle diameter≤10 μm, be conducive to it and be adhered to reduction Fe powder
Surface is filled in the hole of reduction Fe powder, tiny Si, FeSi2The mutually Dispersed precipitate in blank, plays structure refinement
Strengthening and Toughening acts on, and is conducive to improve follow-up blank toughness, cracking is not easily caused in densification process is rolled.But Fe-70~
More Si phases are still suffered from 80%Si high purity ferrosilicons, Si is easily absorbing oxygen, and SiO is formed in exposed Si phase surfaces2Film,
Therefore in the preparation, storage and transfer process of Fe-70~80%Si HIGH-PURITY SILICON iron powders, and follow-up batch mixing, high temperature insostatic pressing (HIP), roll
Inert gas shielding should be used during system, used instrument must also take dehydration, drying process in advance.
On the premise of oxygen content is controlled, influence of the impurity such as other Al, Ca, Mn to alloy magnetic property is little, during
The possibility for introducing other alloying elements is also little.
(2) powder mixes
According to the ratio of Fe-4.5~6.7%Si, reduction Fe powder and Fe-70~80%Si HIGH-PURITY SILICON iron powders are weighed, lazy
Property protective atmosphere under be sufficiently mixed uniformly.
(3) Powder hot isostatic pressure
Using soft iron jacket, in 1070~1170 DEG C of temperature ranges, under the high temperature insostatic pressing (HIP) effect of 100~200MPa, protect
The pressure time is 0.5~2h, obtains pressed compact uniformly, fine and close, and green density reaches 6.75~7.07g/cm3。
(4) cold rolling-sintering
By above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering, progressively it is thinned, single pass rolling reduction≤8%, through multi- pass rolling to always
After reduction ratio reaches 30~50%, then in 1070~1170 DEG C of 0.5~2h of heat preservation sintering, multiple cold rolling-sintering in sintering furnace
Afterwards, the thickness of plate reaches 0.1~0.5mm, and after the completion of Si alloys, strip density brings up to 7.29~7.42g/cm3。
There are a large amount of deformable Fe phases in blank, slab can bear cold-rolling deformation.But there is also more in slab
High Si phases, its performance is more crisp, therefore amount cannot be too high under every time rolling, and accumulation total reduction reaches 30~50%, takes around 8
~25 passages.
Since existing hard crisp phase, cold deformation process can form some micro-cracks.In order to realize the closing of pores and crackle
Repair, and the homogenization diffusion of a degree of Si elements.Cold rolling reduction accumulation needs to sinter 1 again to a certain extent afterwards
It is secondary, 0.1~0.5mm is rolled down to from 36~54mm high temperature insostatic pressing (HIP) plates, takes around and sinters 12~20 times again.
Sintering temperature is too low, is unfavorable for metallurgical binding and the Si element thermal diffusions of Fe powder particles；And sintering temperature is excessive then
Si elements can be caused quickly to spread, cause crystal grain excessive high hardness, embrittlement, follow-up rolling deformation is difficult to realize.
Take reproducibility, inert gas shielding or vacuum-sintering.W, Mo, heat resisting steel etc. can be used during sintering as support
Plate (or burning boat), can also use the ceramic wafers such as corundum, zirconium oxide, but metallic plate thermal conductivity is good, and be beneficial to Even Sintering.
The texture of coarse crystal containing the second phase is formed after sintering.X-ray diffraction Discriminating materials are heterogeneous Fe (Si)
Phase, body-centred cubic several characteristic peaks have obvious separating phenomenon, illustrate there are 2 kinds of different Fe phases of Si solid solubility, wherein must
There are the Si contents in a kind of Fe phases low, there is plastic deformation ability.
(5) full alloying high temperature sintering
Vacuum or restitutive protection 1~4h of atmosphere sintering in 1270~1340 DEG C of temperature ranges, in the effect of thermal diffusion
Under, to realize the full alloyings of Si, form single-phase alloy, obtain the high silicon steel of homogeneous, the thickness of plate is almost unchanged after densification sintering,
For 0.1~0.5mm, density brings up to 7.31~7.43g/cm3。
The HIGH-PURITY SILICON iron powder of particle diameter≤10 μm described in step (1) is by high-energy ball milling or rushes the acquisition of rotation method.
The low energy mixer is conical mixer, V-arrangement batch mixer or drum mixer.
100~300mm of length and width is processed into step (3) and by blank, thickness is 36~54mm squares；High temperature insostatic pressing (HIP) base
The three point bending test of material shows plasticity, and bending strength reaches 357~456MPa.
Add cellulose, paraffin micro mist or zinc stearate water-insoluble binder during mixing, the additive amount total amount of binder is not
More than the 0.3% of mixed-powder gross mass, while add grease and absolute ethyl alcohol does passivator, play passivation Si powder, bonding Fe-Si
The effect of powder, enhancing powder flowbility and compact strength, the additive amount total amount of passivator are no more than mixed-powder gross mass
2%.
Support plate described in step (4) uses molybdenum plate, W plates, heat resisting steel, corundum or zirconia ceramics plate.
During high temperature sintering described in step (6), overlapping places sintering plate, and interlayer is laid with MgO powder, and plate tiling is placed,
Tablet weight is placed on plate, prevents from deforming in sintering process.
In addition to Si contents, content of element such as grain size, crystal grain orientation, C etc. also has the magnetic behavior of high silicon steel
Large effect, can subsequently be annealed, the technological means such as normalizing treatment is controlled by by wet hydrogen.
Essence of the invention is by with the addition of certain volume in the reduction Fe powder of the big volumetric portion with good plasticity
Fine Fe-70~80%Si HIGH-PURITY SILICONs iron powder of ratio, forms Fe-4.5~6.7%Si mixed powders.Obtained by high temperature insostatic pressing (HIP)
Obtain high density, height uniformly.Occur incomplete alloying under the heat effect of high temperature insostatic pressing (HIP), obtain it is a kind of by plasticity Fe crystal grain and
The composite material of the high Si phase compositions of brittleness.Subsequently through multi-pass cold rolling and sintering, structural homogenity and compactness are improved, then lead to
High temperature diffusion-sintering is crossed, realizes the homogenization of Si, so as to obtain the single-phase high silicon steel band of high quality.This method by technique and
Equipment Design, realizes Technics Process Automation, continuous production, and can be mass-produced 0.1~0.5mm thickness, density >=7.25g/
cm3High silicon steel band.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention 1 Powder hot isostatic pressure after blank three-point bending curve map；
Fig. 2 is metallographic structure figure after Powder hot isostatic pressure-cold rolling-sintering of the embodiment of the present invention 2；
Fig. 3 is XRD diffraction curve figures after Powder hot isostatic pressure-cold rolling-sintering of the embodiment of the present invention 2；
Fig. 4 is XRD diffraction curve figures after Powder hot isostatic pressure-cold rolling-high temperature sintering of the embodiment of the present invention 4.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Embodiment 1
By the reduction Fe powder of -100 mesh and the Fe-80%Si high-purity powders of granularity≤10 μm according to 91.625:8.375 ratio
Example mixing, forms the mixed-powder of Fe-6.7%Si.The paraffin micro mist of raw material total amount 0.2%, 0.1% machine are added during mixing
Oil.Absolute ethyl alcohol is added according to 200ml/ tons of amount.
After above-mentioned powder is sufficiently mixed, using soft iron jacket, in 1070 DEG C of temperature ranges, the high temperature insostatic pressing (HIP) of 200MPa
Under effect, dwell time 2h, obtains pressed compact uniformly, fine and close.Jacket is removed with machine-tooled method, and blank is processed into 36
The square of × 100 × 100mm.Green density reaches 6.73g/cm3.Three point bending test test bending strength reaches 357MPa,
See Fig. 1, and show plasticity.
By above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering, progressively it is thinned.Specifically pressure-annealing schedule is：36mm→24mm→
17mm→12mm→9.5mm→7.2mm→5mm→3.5mm→2.4mm→1.6mm→1.02mm→1.02mm→0.71mm→
0.49mm, i.e., sinter through 13 cold rollings and 12 times.
Multi-pass cold rolling is thick in 1070 DEG C of heat preservation sintering 2h, plate to after 30~50%, then in vacuum sintering furnace
Degree is thinned to 0.49mm, and density reaches 7.34g/cm3。
4h is sintered in 1270 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.5mm, density reaches
7.36g/cm3, Si contents are 6.7%.
Embodiment 2
By the reduction Fe powder of -100 mesh and the Fe-70%Si high-purity powders of granularity≤10 μm according to 93.57:6.42 ratio
Mixing, forms the mixed-powder of Fe-4.5%Si.The zinc stearate of raw material total amount 0.2%, 0.01% machine oil are added during mixing.
Absolute ethyl alcohol is added according to 400ml/ tons of amount.
After above-mentioned powder is sufficiently mixed, using soft iron jacket, in 1170 DEG C of temperature ranges, the high temperature insostatic pressing (HIP) of 100MPa
Under effect, the dwell time 0.5, obtains pressed compact uniformly, fine and close.Jacket is removed with machine-tooled method, and blank is processed into
The square of 54 × 300 × 300mm.Green density reaches 7.05g/cm3.Three point bending test test bending strength reaches
456MPa。
By above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering, progressively it is thinned.Specifically pressure-annealing schedule is：54mm→36mm→
36mm→24mm→17mm→12mm→9.5mm→7.2mm→5mm→3.5mm→2.4mm→1.6mm→1.02mm→
1.02mm → 0.71mm → 0.49mm → 0.39mm → 0.25mm → 0.17mm → 0.13mm → 0.10mm, i.e., through 20 cold rollings and
19 sintering.
Multi-pass cold rolling is to after 30~50% total reductions, then is burnt in hydrogen shield sintering furnace in 1170 DEG C of insulations
0.5h is tied, sheet metal thickness is thinned to 0.10mm, and density reaches 7.47g/cm3。
The texture of coarse crystal containing the second phase is formed after sintering, sees Fig. 2.X-ray diffraction Discriminating materials are heterogeneous Fe
(Si) phase, as seen in Figure 3, body-centred cubic several characteristic peaks have obvious separating phenomenon, illustrate there are Si solid solubility it is different 2
Kind Fe phases, wherein must have the Si contents in a kind of Fe phases low, have plastic deformation ability.
1h is sintered in 1340 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.1mm, density reaches
7.48g/cm3, Si contents are 4.5%.
Embodiment 3
By the reduction Fe powder of -100 mesh and the Fe-76%Si high-purity powders of granularity≤10 μm according to 91.45:8.55 ratio
Mixing, forms the mixed-powder of Fe-6.5%Si.The methylcellulose of raw material total amount 0.2%, 0.1% machine are added during mixing
Oil.Absolute ethyl alcohol is added according to 400ml/ tons of amount.
After above-mentioned powder is sufficiently mixed, using soft iron jacket, in 1150 DEG C of temperature ranges, the high temperature insostatic pressing (HIP) of 120MPa
Under effect, dwell time 1.5h, obtains pressed compact uniformly, fine and close.Jacket is removed with machine-tooled method, and blank is processed into
The square of 46 × 180 × 180mm.Green density reaches 6.88g/cm3.Three point bending test test bending strength reaches
380MPa。
By above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering, progressively it is thinned.Specifically pressure-annealing schedule is：46mm→36mm→
24mm→17mm→12mm→9.5mm→7.2mm→5mm→3.5mm→2.4mm→1.6mm→1.02mm→1.02mm→
0.71mm → 0.49mm → 0.39mm → 0.27mm, i.e., sinter through 16 cold rollings and 15 times.
Multi-pass cold rolling is to after 30~50% total deformations, then is burnt in nitrogen protective sintering stove in 1120 DEG C of insulations
1h is tied, sheet metal thickness is thinned to 0.27mm, and density reaches 7.36g/cm3。
2h is sintered in 1320 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.27mm, density reaches
To 7.38g/cm3, Si contents are 6.5%,
Embodiment 4
By the reduction Fe powder of -100 mesh and the Fe-72%Si high-purity powders of granularity≤10 μm according to 91.05:8.95 ratio
Mixing, forms the mixed-powder of Fe-5.8%Si.The machine oil of raw material total amount 0.2% is added during mixing.Absolute ethyl alcohol according to
400ml/ tons of amount addition.
After above-mentioned powder is sufficiently mixed, using soft iron jacket, in 1120 DEG C of temperature ranges, the high temperature insostatic pressing (HIP) of 160MPa
Under effect, dwell time 1.2h, obtains pressed compact uniformly, fine and close.Jacket is removed with machine-tooled method, and blank is processed into
The square of 50 × 200 × 200mm.Green density reaches 6.89g/cm3.Three point bending test test bending strength reaches
396MPa。
By above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering, progressively it is thinned.Specifically pressure-annealing schedule is：52mm→39mm→
26mm→18mm→13mm→10.5mm→8.2mm→5mm→3.2mm→2.4mm→2.0mm→1.3mm→0.90mm→
0.63→0.43mm→0.32mm→0.21mm.Sintered through 17 cold rollings and 16 times.
Multi-pass cold rolling is to after 30~50% total deformations, then is burnt in hydrogen shield sintering furnace in 1150 DEG C of insulations
1h is tied, sheet metal thickness is thinned to 0.21mm, and density reaches 7.40g/cm3。
2h is sintered in 1300 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.21mm, density reaches
To 7.41g/cm3, Si contents are 5.8%, and the XRD analysis figure of its final plate is shown in Fig. 4, is the high silicon steel of single-phase homogeneous.
Claims (7)
1. a kind of Powder hot isostatic pressure manufacture method of high silicon steel thin belt material, it is characterised in that comprise the following steps：
(1) raw material powder prepares
Using -100 mesh reduced iron powders, Fe >=98.5% in reduced iron powder, remaining is Si, Mn, P, S and other are inevitably miscellaneous
Matter, use the Si contents of refining for 70~80% HIGH-PURITY SILICON iron powder, with the ferrosilicon powder of particle diameter≤10 μm, major impurity for~
0.25%Al ,~0.08%Ca and~0.02%C, remaining is Fe；
(2) powder mixes
According to the ratio of Fe-4.5~6.7%Si, reduction Fe powder and Fe-70~80%Si HIGH-PURITY SILICON iron powders are weighed, is protected in inertia
It is sufficiently mixed uniformly under shield atmosphere；
(3) Powder hot isostatic pressure
Using soft iron jacket, in 1070~1170 DEG C of temperature ranges, under the high temperature insostatic pressing (HIP) effect of 100~200MPa, during pressurize
Between be 0.5~2h, obtain pressed compact uniformly, fine and close, green density reaches 6.75~7.07g/cm3；
(4) cold rolling-sintering
Progressively it is thinned, single pass rolling reduction≤8%, above-mentioned high temperature insostatic pressing (HIP) plate cold rolling-sintering through under multi- pass rolling to stagnation pressure
After rate reaches 30~50%, then in sintering furnace after 1070~1170 DEG C of 0.5~2h of heat preservation sintering, multiple cold rolling-sintering, plate
The thickness of material reaches 0.1~0.5mm, and after the completion of Si alloys, strip density brings up to 7.29~7.42g/cm3；
(5) full alloying high temperature sintering
Vacuum or restitutive protection 1~4h of atmosphere sintering in 1270~1340 DEG C of temperature ranges, it is real under the action of thermal diffusion
The existing full alloyings of Si, form single-phase alloy, obtain the high silicon steel of homogeneous, and the thickness of plate is 0.1~0.5mm after densification sintering,
Density brings up to 7.31~7.43g/cm3。
2. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as is described in the claims, it is characterised in that：Step (1)
The HIGH-PURITY SILICON iron powder of particle diameter≤10 μm is by high-energy ball milling or rushes the acquisition of rotation method.
3. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as is described in the claims, it is characterised in that：Described
Low energy mixer is conical mixer, V-arrangement batch mixer or drum mixer.
4. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as is described in the claims, it is characterised in that：Step (3)
In and blank is processed into 100~300mm of length and width, thickness is 36~54mm squares；The three point bending test of high temperature insostatic pressing (HIP) blank
Plasticity is shown, bending strength is 106~196MPa.
5. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Add during mixing
Cellulose, paraffin micro mist or the water-insoluble binder of zinc stearate, the additive amount total amount of binder are no more than the total matter of mixed-powder
The 0.3% of amount, while add grease and absolute ethyl alcohol does passivator, play passivation Si powder, bonding Fe-Si powder, enhancing flow of powder
Property and compact strength effect, the additive amount total amount of passivator is no more than the 2% of mixed-powder gross mass.
6. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Step (4)
The support plate uses molybdenum plate, W plates, heat resisting steel, corundum or zirconia ceramics plate.
7. the Powder hot isostatic pressure manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Step (6)
During described high temperature sintering, overlapping places sintering plate, and interlayer is laid with MgO powder, and plate tiling is placed, and tablet is placed on plate
Weight, prevents from deforming in sintering process.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842194A (en) * | 2019-11-15 | 2020-02-28 | 北京科技大学 | Method for preparing high-silicon steel sheet through powder pressing and firing |
| CN111170764A (en) * | 2019-12-31 | 2020-05-19 | 娄底市安地亚斯电子陶瓷有限公司 | Wet hydrogen system and working method thereof |
| CN114686745A (en) * | 2022-01-05 | 2022-07-01 | 中南大学 | Powder metallurgy modified low-alloy ultrahigh-strength steel and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000192186A (en) * | 1998-12-25 | 2000-07-11 | Daido Steel Co Ltd | Manufacture of soft magnetic alloy sheet, and magnetic core member using this sheet |
| CN1273611A (en) * | 1998-05-29 | 2000-11-15 | 住友特殊金属株式会社 | Method for producing high silicon steel and silicon steel |
| CN1528921A (en) * | 2003-09-25 | 2004-09-15 | 武汉理工大学 | High-silica silicon-steel sheet heat treatment and multiple cold-rolling method |
| CN102658367A (en) * | 2012-05-16 | 2012-09-12 | 上海大学 | Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method |
| CN106808159A (en) * | 2015-11-27 | 2017-06-09 | 安徽中龙节能科技有限公司 | A kind of preparation method of high-silicon silicon steel sheet |
-
2017
- 2017-12-18 CN CN201711367261.7A patent/CN107900345A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273611A (en) * | 1998-05-29 | 2000-11-15 | 住友特殊金属株式会社 | Method for producing high silicon steel and silicon steel |
| JP2000192186A (en) * | 1998-12-25 | 2000-07-11 | Daido Steel Co Ltd | Manufacture of soft magnetic alloy sheet, and magnetic core member using this sheet |
| CN1528921A (en) * | 2003-09-25 | 2004-09-15 | 武汉理工大学 | High-silica silicon-steel sheet heat treatment and multiple cold-rolling method |
| CN102658367A (en) * | 2012-05-16 | 2012-09-12 | 上海大学 | Method and device for preparing high-silicon silicon steel sheet in static magnetic field with powder sintering method |
| CN106808159A (en) * | 2015-11-27 | 2017-06-09 | 安徽中龙节能科技有限公司 | A kind of preparation method of high-silicon silicon steel sheet |
Non-Patent Citations (7)
| Title |
|---|
| 傅祖铸: "《有色金属板带材生产》", 1 April 2009, 中南大学出版社 * |
| 员文杰: "粉末轧制法制备高硅硅钢片的工艺及过程原理的研究", 《中国博士学位论文全文数据库工程科技Ⅰ辑》 * |
| 员文杰等: "粉末轧制法制备Fe-6.5%Si硅钢片的研究", 《粉末冶金技术》 * |
| 周勇: "铁、硅复合粉末的轧制成型与后续热处理", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅰ辑》 * |
| 张翔: "粉末冶金法制备高硅硅钢片的轧制和热处理工艺研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 李然: "粉末压延技术制备高硅铁硅合金", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅰ辑》 * |
| 莱内尔: "《粉末冶金原理和应用》", 30 November 1989, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110842194A (en) * | 2019-11-15 | 2020-02-28 | 北京科技大学 | Method for preparing high-silicon steel sheet through powder pressing and firing |
| CN111170764A (en) * | 2019-12-31 | 2020-05-19 | 娄底市安地亚斯电子陶瓷有限公司 | Wet hydrogen system and working method thereof |
| CN114686745A (en) * | 2022-01-05 | 2022-07-01 | 中南大学 | Powder metallurgy modified low-alloy ultrahigh-strength steel and preparation method thereof |
| CN114686745B (en) * | 2022-01-05 | 2022-11-01 | 中南大学 | Powder metallurgy modified low-alloy ultrahigh-strength steel and preparation method thereof |
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