CN107999761A - A kind of powder hotforging manufacture method of high silicon steel thin belt material - Google Patents
A kind of powder hotforging manufacture method of high silicon steel thin belt material Download PDFInfo
- Publication number
- CN107999761A CN107999761A CN201711367255.1A CN201711367255A CN107999761A CN 107999761 A CN107999761 A CN 107999761A CN 201711367255 A CN201711367255 A CN 201711367255A CN 107999761 A CN107999761 A CN 107999761A
- Authority
- CN
- China
- Prior art keywords
- powder
- sintering
- silicon steel
- hotforging
- manufacture method
- 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.)
- Withdrawn
Links
- 239000000843 powder Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000005245 sintering Methods 0.000 claims abstract description 47
- 238000005242 forging Methods 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 30
- 230000009467 reduction Effects 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011812 mixed powder Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000005275 alloying Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 10
- 238000000280 densification Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 229910017082 Fe-Si Inorganic materials 0.000 claims description 8
- 229910017133 Fe—Si Inorganic materials 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000013001 point bending Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- 239000012188 paraffin wax Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 238000000713 high-energy ball milling Methods 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 238000002161 passivation Methods 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 18
- 229910045601 alloy Inorganic materials 0.000 abstract description 17
- 238000005097 cold rolling Methods 0.000 abstract description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007767 bonding agent Substances 0.000 abstract description 2
- 238000011049 filling Methods 0.000 abstract description 2
- 238000009766 low-temperature sintering Methods 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 16
- 239000013078 crystal Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000010721 machine oil Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910005331 FeSi2 Inorganic materials 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000027455 binding Effects 0.000 description 2
- 238000009739 binding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910005347 FeSi Inorganic materials 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- -1 using Si contents Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- 229910006585 β-FeSi Inorganic materials 0.000 description 1
Classifications
-
- 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
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- 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
-
- 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
- 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
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
- B22F2003/175—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging by hot forging, below sintering temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of powder hotforging manufacture method of high silicon steel thin belt material, for the present invention using reduction Fe powder, the HIGH-PURITY SILICON iron powder that Si contents are 70~80% is raw material, forms Fe Si mixed powders.HIGH-PURITY SILICON iron powder is adhered in the hole of reduced iron powder surface or filling ferrous powder by bonding agent and dispersant; it is molded squarely base; it is heated to 1010~1080 DEG C and realizes Fe phase austenitizings; final forging temperature is 910~980 DEG C after multiple hot forging; powder hotforging base is carried out to vacuum or protection of reducing atmosphere sintering at 1060~1160 DEG C; subsequently through multiple cold rolling, low-temperature sintering; finally sintered in 1250~1320 DEG C of High temperature diffusions; realize homogeneous alloy; it is thick to obtain 0.1~0.5mm containing 4.5~6.7%Si, density >=7.35g/cm3High silicon steel band.
Description
Technical field
Preparation and manufacture field the invention belongs to metal material, and in particular to the powder hotforging of high silicon steel thin belt material and roll
The method for making 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 hotforging 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, hot forging green compact are molded into after adding binder, then prepare certain thickness slab using powder hotforging method, are utilized
The large deformation of powder hotforging act on so that green density improve, structure refinement, and realize under thermal diffusion effect it is partially-alloyed,
Form the α-Fe crystal grain of poor Si and the heterogeneous structure of the high Si phases of brittleness with plastic deformation ability.It is subsequently cold by multi-pass
Thin plate is obtained after rolling-sintering, is finally sintered using High temperature diffusion and obtains the high silicon steel band of homogeneous single phase.
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.By suitable bonding agent, divide
Powder adheres to fine HIGH-PURITY SILICON iron powder in the hole of reduced iron powder surface or filling ferrous powder in mixed process.Due to also
Former Fe powder is the big particle with high-compressibility, occupies larger volume ratio in mixed powder, is added not notable after ferrosilicon powder
Its plastic deformation ability is reduced, can be by being molded squarely base.It is heated to 1010~1080 DEG C and realizes Fe phase austenitizings,
Then closed mould hot forging is placed into, repeatedly final forging temperature is 910~980 DEG C after forging so that pressed compact is close complete fine and close, about
6.79~7.11g/cm3.Then powder hotforging base is subjected to vacuum or protection of reducing atmosphere in 1060~1160 DEG C of temperature ranges
Sintering, makes Fe powder particles metallurgical bindings, and ferrosilicon powder particles realized with Fe it is partially-alloyed, formed densification, there is plasticity change
The high silicon steel blank of heterogeneous structure of the high Si phases of α-Fe crystal grain and brittleness of the poor Si of shape ability.Expand subsequently through multiple cold rolling, low temperature
Sintering is dissipated, the density rise of slab, plate thickness are reduced, and the alloying level of Si is also continuously improved.Finally at 1250~1320 DEG C
Vacuum or protection of reducing atmosphere sintering, the homogeneous alloy of high silicon steel is realized with the help of thermal diffusion, is obtained in temperature range
0.1~0.5mm containing 4.5~6.7%Si is thick, density >=7.35g/cm3High silicon steel band.
The method 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, using Si contents, particle diameter≤10 μm, this ferrosilicon powder is except containing 70~80% for 70~80% HIGH-PURITY SILICON iron powder
Beyond 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 hotforging 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, hot forging, rolled
Cheng Zhongying uses inert gas shielding, and 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 using low energy mixer mix, mixing velocity and time regarding mixing uniformity depending on, should try one's best mitigation Fe
Processing hardening occurs in mixed process for powder.
(3) powder hotforging
Square pressed compact is prepared using compression-moulding methods, the green density of acquisition is 6.45~6.62g/cm3；Before hot forging
Molding square billet is heated to 1010~1080 DEG C under nitrogen protective effect, keeps the temperature 2~4h, hot forging is fine and close in square dies
Change, repeatedly final forging temperature is 910~980 DEG C after forging, and pressed compact is close complete fine and close, and density reaches 6.79~7.11g/cm3。
Under impact force action, hot forging pressed compact is close complete fine and close.Make the plasticity of plate after hot forging in order to avoid alloying
Decline, relatively low heating-up temperature is have selected before hot forging.Fe phase and complexity FeSi phase composition of the alloy structure for high-ductility after hot forging
Complex tissue, which possesses the high-ductility characteristic of simple substance Fe.
(4) cold rolling-sintering
By above-mentioned hot forged plate cold rolling-sintering, progressively it is thinned.
Single pass rolling reduction≤8%, after multi- pass rolling reaches 30~50% to total reduction, then in sintering furnace in
1060~1160 DEG C of 0.5~2h of heat preservation sintering, after multiple cold rolling-sintering, the thickness of plate reaches 0.1~0.5mm, with Si's
Alloying is gradually completing, and strip density improves, and reaches 7.34~7.48g/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 hot forging 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 1250~1320 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 reaches 7.35~7.49g/cm3。
The HIGH-PURITY SILICON iron powder of particle diameter≤10 μm 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.
The square pressed compact prepared in step (3), length and width are respectively 100~300mm, are highly 40~60mm, using table
The pressure that surface pressure is 400~600MPa is suppressed.The thickness of blank is 36~54mm after hot forging, and three point bending test shows to mould
Property, bending strength reaches 123~180MPa.
Step (2) adds cellulose, paraffin micro mist when mixing or zinc stearate is water-insoluble adds as binder, binder
Dosage total amount is no more than the 0.8% of mixed-powder gross mass, while adds grease and absolute ethyl alcohol does passivator, plays passivation Si
Powder, bonding Fe-Si powder, the effect for strengthening powder flowbility and compact strength, the additive amount total amount of passivator are no more than mixed powder
The 2% of last gross mass.
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 alloys basis powder.Using powder heat
Slab is swaged into, obtains high green density.Since hot forging is organized as incomplete alloying tissue, except small part richness Si in tissue
Outside phase, main constituent is yielding Fe phases, therefore subsequently can improve structural homogenity by multi-pass cold rolling and sintering
And compactness, then high-temperature diffusion process, the homogenization of Si is realized, so as to obtain the single-phase high silicon steel band of high quality.This method
By technique and equipment Design, Technics Process Automation, continuous production are realized, can be mass-produced 0.1~0.5mm thickness, close
Degree >=7.35g/cm3High silicon steel band.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention 1 powder hotforging after blank three-point bending curve map.
Fig. 2 is metallographic structure figure after powder hotforging-cold rolling-sintering of the embodiment of the present invention 2；
Fig. 3 is XRD diffraction curve figures after powder hotforging-cold rolling-sintering of the embodiment of the present invention 2；
Fig. 4 is XRD diffraction curve figures after powder hotforging-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 0.6%, 0.1% machine are added during mixing
Oil.Absolute ethyl alcohol is added according to 200ml/ tons of amount.Using V-arrangement batch mixer by above-mentioned powder mixing 4h.
Square pressed compact is prepared using compression-moulding methods, and pressed compact size is 100 × 100 × 40mm, surface pressing
600MPa, green density 6.45g/cm3。
Molding square billet is heated to 1010 DEG C under nitrogen protective effect, keeps the temperature 4h.Using power forging machine, in square dies
Middle hot forging densification, repeatedly final forging temperature is 910 DEG C after forging, and the thickness of blank is about 36mm, and density reaches 6.79g/cm3。
Three point bending test shows plasticity, sees Fig. 1, and bending strength reaches 123MPa.
By above-mentioned hot forged 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,
Sintered through 13 cold rollings and 12 times.
Multi-pass cold rolling is thick in 1060 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。
1h is sintered in 1320 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.5mm, density reaches
7.35g/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 0.7%, 0.1% machine oil are added during mixing.
Absolute ethyl alcohol is added according to 400ml/ tons of amount.Using drum mixer by above-mentioned powder mixing 6h.
Square pressed compact is prepared using compression-moulding methods, and pressed compact size is 300 × 300 × 60mm, surface pressing
600MPa, green density 6.62g/cm3。
Molding square billet is heated to 1080 DEG C under nitrogen protective effect, keeps the temperature 2h.Using power forging machine, in square dies
Middle hot forging densification, repeatedly final forging temperature is 980 DEG C after forging, and the thickness of blank is about 54mm, and density reaches 7.11g/cm3。
Three point bending test shows plasticity, and bending strength reaches 180MPa.
By above-mentioned hot forged 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., burn through 20 cold rollings and 19 times
Knot.
Multi-pass cold rolling is to after 30~50% total reductions, then is burnt in hydrogen shield sintering furnace in 1160 DEG C of insulations
0.5h is tied, sheet metal thickness is thinned to 0.10mm, and density reaches 7.48g/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.
4h is sintered in 1250 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.1mm, density reaches
7.49g/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 paraffin micro mist of raw material total amount 0.4% is added during mixing, 0.2% methyl is fine
Dimension element, 0.1% machine oil.Absolute ethyl alcohol is added according to 400ml/ tons of amount.Above-mentioned powder is mixed using drum mixer
6h。
Square pressed compact is prepared using compression-moulding methods, and pressed compact size is 200 × 200 × 50mm, surface pressing
500MPa, green density 6.44g/cm3。
Molding square billet is heated to 1020 DEG C under nitrogen protective effect, keeps the temperature 2h.Using power forging machine, in square dies
Middle hot forging densification, repeatedly final forging temperature is 920 DEG C after forging, and the thickness of blank is about 46mm, and density reaches 6.81g/cm3。
Three point bending test shows plasticity, and bending strength reaches 156MPa.
By above-mentioned hot forged 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 7.35g/cm3。
2h is sintered in 1300 DEG C of Temperature Vacuums, realizes the full alloyings of Si, forms single-phase alloy, thickness 0.27mm, density reaches
To 7.36g/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 paraffin micro mist of raw material total amount 0.6%, 0.2% machine oil are added during mixing.
Absolute ethyl alcohol is added according to 400ml/ tons of amount.Using drum mixer by above-mentioned powder mixing 3h.
Square pressed compact is prepared using compression-moulding methods, and pressed compact size is 220 × 220 × 55mm, surface pressing
450MPa, green density 6.48g/cm3。
Molding square billet is heated to 1060 DEG C under nitrogen protective effect, keeps the temperature 2h.Using power forging machine, in square dies
Middle hot forging densification, repeatedly final forging temperature is 960 DEG C after forging, and the thickness of blank is about 52mm, and density reaches 6.86g/cm3。
Three point bending test shows plasticity, and bending strength reaches 160MPa.
By above-mentioned hot forged 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 1120 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 hotforging 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, uses Si contents as 70~80% HIGH-PURITY SILICON iron powder, particle diameter≤10 μm, major impurity is~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；Protected in inertia
Protect under atmosphere and mixed using low energy mixer；
(3) powder hotforging
Square pressed compact is prepared using compression-moulding methods, green density is 6.45~6.62g/cm3；Square billet will be molded before hot forging
1010~1080 DEG C are heated under nitrogen protective effect, keeps the temperature 2~4h, repeatedly final forging temperature is 910~980 DEG C after forging,
Pressed compact reaches 6.79~7.11g/cm close to full densification, density3；
(4) cold rolling-sintering
By above-mentioned hot forged plate cold rolling-sintering, progressively it is thinned, single pass rolling reduction≤8%, is reached through multi- pass rolling to total reduction
To after 30~50%, then in sintering furnace after 1060~1160 DEG C of 0.5~2h of heat preservation sintering, multiple cold rolling-sintering, plate
Thickness reaches 0.1~0.5mm, and after the completion of the alloying of Si, strip density brings up to 7.34~7.48g/cm3；
(5) full alloying high temperature sintering
Vacuum or restitutive protection 1~4h of atmosphere sintering in 1250~1320 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 reaches 7.35~7.49g/cm3。
2. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Particle diameter≤10 μm
HIGH-PURITY SILICON iron powder is by high-energy ball milling or rushes the acquisition of rotation method.
3. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that the low energy
Mixer is conical mixer, V-arrangement batch mixer or drum mixer.
4. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：System in step (3)
For the square pressed compact gone out, length and width is respectively 100~300mm, is highly 40~60mm, uses surface pressing as 400~600MPa
Pressure compacting.The thickness of blank is 36~54mm after hot forging, and three point bending test shows plasticity, and bending strength reaches 123
~180MPa.
5. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Step (2) mixes
When add cellulose, paraffin micro mist or the water-insoluble binder of zinc stearate, the additive amount total amount of binder is no more than mixed-powder
The 0.8% of gross mass, while add grease and absolute ethyl alcohol does passivator, play passivation Si powder, bonding Fe-Si powder, enhancing powder
The effect of mobility and compact strength, the additive amount total amount of passivator are no more than the 2% of mixed-powder gross mass.
6. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Step (4) is described
Support plate use molybdenum plate, W plates, heat resisting steel, corundum or zirconia ceramics plate.
7. the powder hotforging manufacture method of high silicon steel thin belt material as claimed in claim 1, it is characterised in that：Step (6) is described
High temperature sintering when, overlapping place sintering plate, interlayer be laid with MgO powder, plate tiling place, on plate place tablet weight
Thing, prevents from deforming in sintering process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367255.1A CN107999761A (en) | 2017-12-18 | 2017-12-18 | A kind of powder hotforging manufacture method of high silicon steel thin belt material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367255.1A CN107999761A (en) | 2017-12-18 | 2017-12-18 | A kind of powder hotforging manufacture method of high silicon steel thin belt material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107999761A true CN107999761A (en) | 2018-05-08 |
Family
ID=62059630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711367255.1A Withdrawn CN107999761A (en) | 2017-12-18 | 2017-12-18 | A kind of powder hotforging manufacture method of high silicon steel thin belt material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107999761A (en) |
Citations (4)
| 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 |
| 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 |
| CN104962798A (en) * | 2015-07-24 | 2015-10-07 | 北京科技大学 | Method for preparing high-silicon steel by powder sleeve forming |
| CN107282928A (en) * | 2017-07-17 | 2017-10-24 | 贵州理工学院 | Powder Diffusion prepares the method and device of high-silicon steel thin strip under magnetic field |
-
2017
- 2017-12-18 CN CN201711367255.1A patent/CN107999761A/en not_active Withdrawn
Patent Citations (4)
| 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 |
| 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 |
| CN104962798A (en) * | 2015-07-24 | 2015-10-07 | 北京科技大学 | Method for preparing high-silicon steel by powder sleeve forming |
| CN107282928A (en) * | 2017-07-17 | 2017-10-24 | 贵州理工学院 | Powder Diffusion prepares the method and device of high-silicon steel thin strip under magnetic field |
Non-Patent Citations (4)
| Title |
|---|
| 员文杰，沈强，张联盟: "粉末轧制法制备Fe-6.5%Si硅钢片的研究", 《粉末冶金技术》 * |
| 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》 * |
| 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》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107900345A (en) | A kind of Powder hot isostatic pressure manufacture method of high silicon steel thin belt material | |
| CN107829036A (en) | A kind of powder hot-pressing sintering manufacture method of high silicon steel thin belt material | |
| CN108097961A (en) | A kind of method that High temperature diffusion sintering prepares high silicon steel band with Powder hot isostatic pressure | |
| CN107900347A (en) | A kind of method that powder hotforging prepares high silicon steel band with High temperature diffusion sintering | |
| CN107971494A (en) | A kind of method that powder hot-pressing sintering prepares Fe-6.5%Si soft magnetic materials thin strips | |
| CN107971495A (en) | A kind of method that Powder hot isostatic pressure prepares Fe-6.5%Si soft magnetic materials thin strips | |
| CN107999757A (en) | A kind of method that powder hot-pressing sintering prepares single-phase Fe-6.5%Si silicon steel | |
| CN108103390A (en) | A kind of method that Powder hot isostatic pressure prepares single-phase Fe-6.5%Si silicon steel | |
| CN108097965A (en) | A kind of powder extruding method for making of high silicon steel thin belt material | |
| CN107900349A (en) | A kind of method that powder hotforging prepares Fe 6.5%Si soft magnetic materials thin strips | |
| CN107900348A (en) | A kind of method that powder hotforging prepares single-phase Fe 6.5%Si silicon steel | |
| CN107900346A (en) | A kind of method that Powder hot isostatic pressure prepares high silicon steel thin belt material | |
| CN107855532A (en) | A kind of method that powder hot-pressing sintering prepares high silicon steel thin belt material | |
| CN108044106A (en) | A kind of method that Powder hot isostatic pressure prepares high silicon steel band with High temperature diffusion sintering | |
| CN108044107A (en) | A kind of Powder hot isostatic pressure preparation method of Fe-6.5%Si soft magnetic materials thin strip | |
| CN107999761A (en) | A kind of powder hotforging manufacture method of high silicon steel thin belt material | |
| CN107900354A (en) | A kind of method that powder extruding prepares high silicon steel thin belt material | |
| CN107999763A (en) | A kind of method that powder hotforging prepares Fe-6.5%Si bands with diffusion-sintering | |
| CN108044098A (en) | A kind of method that powder hotforging prepares high silicon steel thin belt material | |
| CN107999760A (en) | A kind of method that diffusion-sintering prepares Fe-6.5%Si bands with powder hotforging | |
| CN108080641A (en) | A kind of powder rolling preparation method of Fe-6.5%Si soft magnetic materials thin strip | |
| CN108044100A (en) | A kind of method that powder rolling prepares Fe-6.5%Si soft magnetic materials thin strips | |
| CN107999762A (en) | A kind of powder hotforging preparation method of Fe-6.5%Si soft magnetic materials thin strip | |
| CN108044099A (en) | A kind of method that High temperature diffusion sintering prepares high silicon steel band with powder hotforging | |
| CN108015287A (en) | A kind of method that hot pressed sintering prepares Fe-6.5%Si bands with High temperature diffusion sintering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180508 |