CN104302801B - The iron loss characteristic that punch press process causes deteriorates less non-oriented electromagnetic steel sheet having - Google Patents
The iron loss characteristic that punch press process causes deteriorates less non-oriented electromagnetic steel sheet having Download PDFInfo
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- CN104302801B CN104302801B CN201380025093.7A CN201380025093A CN104302801B CN 104302801 B CN104302801 B CN 104302801B CN 201380025093 A CN201380025093 A CN 201380025093A CN 104302801 B CN104302801 B CN 104302801B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title abstract description 40
- 239000000470 constituent Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000004080 punching Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- -1 50Hz Substances 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 15
- 229910052785 arsenic Inorganic materials 0.000 description 10
- 238000007792 addition Methods 0.000 description 9
- 238000005097 cold rolling Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 6
- 230000005712 crystallization Effects 0.000 description 6
- 238000005098 hot rolling Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 229910052787 antimony Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 239000011162 core material Substances 0.000 description 2
- 238000009114 investigational therapy Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003313 weakening Effects 0.000 description 2
- 230000037250 Clearance Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000002542 deteriorative Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
Abstract
The present invention punch press process is provided before the less non-oriented electromagnetic steel sheet having of the iron loss characteristic that iron loss characteristic is outstanding and punch press process causes deterioration, it has following constituent: containing the C below 0.005 mass %, the Si of 2～7 mass %, the Mn of 0.03～3 mass %, Al below 3 mass %, P below 0.2 mass %, S below 0.005 mass %, N below 0.005 mass %, the Se and 0.0005～the As of 0.005 mass % of 0.0001～0.0005 mass %, remainder is made up of Fe and inevitable impurity, 50Hz, iron loss W during 1.5T excitation15/50For below 3.5W/kg, and the ratio (x/t) of the amount of subsiding x during steelplate punching and thickness of slab t is less than 0.15, and wherein, the unit of x, t is mm.
Description
Technical field
The present invention relates to the iron loss characteristic deterioration that the iron loss characteristic before a kind of not only punch press process is outstanding, punch press process causes
The least non-oriented electromagnetic steel sheet having.
Background technology
In recent years, in the world trends of energy-saving, even if in electric equipment, the most strongly pursue high efficiency.Phase therewith
Companion, at the core material as electric equipment in widely used non-oriented electromagnetic steel sheet having, in order to realize electric equipment
High efficiency, and reduce the problem that iron loss becomes big.In order to meet above-mentioned requirements, in non-oriented electromagnetic steel sheet having, led in the past
Low iron loss is realized by adding element raising intrinsic impedance, the minimizing thicknesss of slab such as Si, Al.
It is well known, however, that there is following situation: use the feelings of non-oriented electromagnetic steel sheet having at the core material as motor etc.
Under condition, characteristic variation compared with the characteristic of blank steel plate of this motor etc..Consider that reason one of among these is, to non-directional
For the characteristic of electromagnetic steel plate, generally, it is evaluated with respect to the Epstein test using test piece wide for 30mm
Situation, the situation of the narrower width of the facewidth of the motor of prototype, yoke a width of 5～10mm is more, because of introduce when punch press process
Deform and cause iron loss characteristic to deteriorate.The magnetic characteristic caused as such punch press process deteriorates less material, such as, patent
A kind of disclosed in document 1 reduce shearing resistance thus Reducing distortion amount directionless by adding the S of 0.015～0.035wt%
Property electromagnetic steel plate.
Patent documentation 1: No. 2970436 publications of Japanese Patent No.
But, the steel plate disclosed in patent documentation 1 compared with existing non-oriented electromagnetic steel sheet having containing substantial amounts of S, institute
Magnetic characteristic with the blank steel plate before punch press process itself is poor, thus cannot fully meet strictly wanting iron loss characteristic now
Ask.Therefore, the strong iron loss characteristic wished before developing a kind of not only punch press process is outstanding, and the iron loss characteristic after punch press process is also
The non-oriented electromagnetic steel sheet having that the outstanding i.e. iron loss characteristic deterioration that punch press process causes is less.
Summary of the invention
The present invention is the problems referred to above existed in view of prior art and completes, and its object is to provide a kind of punch press process
Before the less non-oriented electromagnetic steel sheet having of the iron loss characteristic that iron loss characteristic is outstanding and punch press process causes deterioration.
People are in order to solve above-mentioned problem in invention, are conceived to constituent and the steel produced by punch press process of steel plate
The size (after, also referred to as " amount of subsiding (sag) ") subsided of plate repeats further investigation to the impact of iron loss characteristic.Its
Result is, finds following situation, the size subsided of steel plate produced by i.e. in punch press process and the deterioration rate of iron loss characteristic
There is close association, and the iron loss not making blank steel plate by adding appropriate Se and As can reduce this size subsided
Deterioration in characteristics, and then the iron loss characteristic deterioration that punch press process causes can be suppressed, thus develop the present invention.
The present invention based on above-mentioned cognition relates to a kind of non-oriented electromagnetic steel sheet having, it is characterised in that have following composition
Composition: containing the Al below the C below 0.005 mass %, 2～7 Si, 0.03～3 Mn of mass % of mass %, 3 mass %,
N below P below 0.2 mass %, the S below 0.005 mass %, 0.005 mass %, 0.0001～0.0005 mass %
Se and the 0.0005～As of 0.005 mass %, remainder is made up of Fe and inevitable impurity, and 50Hz, 1.5T encourage
Iron loss W during magnetic15/50For below 3.5W/kg, and the ratio (x/t) of the amount of subsiding x during steelplate punching and thickness of slab t be 0.15 with
Under, wherein, the unit of x, t is mm.
The non-oriented electromagnetic steel sheet having of the present invention is characterised by, average crystallite particle diameter is 30～150 μm.
It addition, the non-oriented electromagnetic steel sheet having of the present invention is characterised by, in addition to described constituent, possibly together with
In the Sn and 0.003 of 0.003～0.5 mass %～the Sb of 0.5 mass % wantonly a kind or 2 kinds.
In accordance with the invention it is possible to stably provide the iron loss characteristic before a kind of not only punch press process outstanding and after punch press process
The less non-oriented electromagnetic steel sheet having of the iron loss characteristic deterioration that causes of the most outstanding i.e. punch press process of iron loss characteristic, so helping greatly
In the high efficiency using the electric equipments such as the motor of iron core that manufactured by punch press process.
Accompanying drawing explanation
Fig. 1 is the figure defining the amount of subsiding that punch press process causes.
Fig. 2 is that the method to the iron loss utilizing Epstein test to measure the test piece of wide 30mm and the test piece of wide 10mm is carried out
The figure illustrated.
Fig. 3 is the ratio (x/t) representing the amount of subsiding x and the thickness of slab t chart on the impact of iron loss deterioration rate.
Fig. 4 is to represent that Se content is to the ratio (x/t) of the amount of subsiding x and thickness of slab t and iron loss W15/50The chart of impact.
Fig. 5 is to represent that As content is to the ratio (x/t) of the amount of subsiding x and thickness of slab t and iron loss W15/50The chart of impact.
Fig. 6 is to represent that average crystallite particle diameter is to the ratio (x/t) of the amount of subsiding x and thickness of slab t and iron loss W15/50The figure of impact
Table.
Detailed description of the invention
Experiment to the opportunity as the exploitation present invention illustrates.
<experiment 1>
First, for the impact on iron loss characteristic of the size (amount of subsiding) subsided produced by investigating in punch press process,
To the C containing 0.0025 mass %, the Si of 3.0 mass %, the Al of 0.5 mass %, the Mn of 0.5 mass %, 0.01 mass %
The steel billet of the As of P, the N of 0.0018 mass %, the S of 0.0019 mass %, the Se of 0.0001 mass % and 0.0010 mass %
Heat 30 points with 1100 DEG C, afterwards, carry out hot rolling and form the hot rolled plate of thickness of slab 2.0mm, in the hot rolling implementing 30 seconds with 980 DEG C
After plate annealing, cold rolling and formed and there is the cold-reduced sheet of various thickness of slab 0.20～0.50mm, then, with 950 DEG C of enforcements by 1 time
The final annealing of 10 seconds, forms insulating coating, thus becomes non-oriented electromagnetic steel sheet having (sheet).Additionally, utilize segment method
Try to achieve the average crystallite particle diameter of rolling direction (L direction) section of said products plate, about 80 μm.
It follows that by spacing (clearance) being set as the punch press process of 5% comes from the L direction of said products plate
And C direction chooses the test piece of long 180mm × wide 30mm and long 180mm × wide 10mm.Here, above-mentioned spacing refer to upper mold with
The gap of lower mold is divided by the value (%) of the thickness of slab gained of work piece.It addition, stamping-out to be processed as the end face of the test piece of wide 10mm
The size (amount of subsiding) subsided measure.Here, the above-mentioned amount of subsiding is defined as shown in Figure 1.
It addition, utilize Epstein test to measure iron loss W of above-mentioned test piece15/50.Now, as shown in Figure 2 with along wide
3 test pieces of arrangement of degree direction and be formed as the mode of wide 30mm and the test piece of wide 10mm measured.So measuring iron loss
In the case of, contain cut-off parts at two among the test piece of wide 30mm, it is possible to evaluate the punch press process impact on iron loss characteristic.
Additionally, punch press process on the impact of iron loss as defined in following formula, by iron loss W of the test piece of wide 10mm15/50Relatively
Iron loss W in the test piece of wide 30mm15/50Deterioration rate (iron loss deterioration rate) be evaluated.
Note
Iron loss deterioration rate (%)={ (W15/50(10mm width))-(W15/50(30mm width)) }/(W15/50(30mm width)) × 100
For above-mentioned measurement result, the amount of subsiding x when showing punch press process in Fig. 3 and the ratio (x/t) of thickness of slab t and iron loss
Relation between deterioration rate.It is recognised that be less than 0.15 can by the ratio (x/t) making the amount of subsiding x and thickness of slab t from this figure
Iron loss is deteriorated rate and is reduced to less than 20%.This is considered because, if the amount of subsiding is relatively big, then by rushing with the ratio (x/t) of thickness of slab
Cut out and near the end face that processing produces, remain compression stress, thus magnetic characteristic deterioration.From this result, in the present invention,
The ratio (x/t) making the amount of subsiding x and thickness of slab t is less than 0.15.
<experiment 2>
It follows that as the countermeasure of the amount of subsiding reducing the end face produced by above-mentioned punch press process, invention people are conceived to
As Se and As of element of the weakening grain-boundary strength of cyrystal boundary segregation type, carry out following experiment.
To the C containing 0.0030 mass %, the Si of 2.5 mass %, the Al of 1 mass %, the Mn of 0.5 mass %, 0.01 matter
Amount the P of %, the N of 0.0020 mass %, the S of 0.0022 mass %, and containing 0.0001～0.002 mass % scope Se and
The steel billet of the As of 0.0001～0.010 mass % scope heats 30 points with 1100 DEG C, afterwards, carries out hot rolling and forms thickness of slab
The hot rolled plate of 2.0mm, after the hot rolled plate annealing implementing 30 seconds with 980 DEG C, cold rolling and form thickness of slab 0.50mm's by 1 time
Cold-reduced sheet, then, with 970 DEG C of enforcement final annealing of 10 seconds, forms insulating coating, thus becomes non-oriented electromagnetic steel sheet having
(sheet).
By spacing being set as the punch press process of 5% is chosen from the L direction of the sheet so obtained and C direction
The test piece of long 180mm × wide 10mm, measures the amount of subsiding of stamping-out end face in the way of identical with above-mentioned<experiment 1>, and utilizes love
Sprinkle stein test and measure iron loss W15/50.Additionally, by arrange 3 test pieces in the width direction and to above-mentioned in the way of being formed as wide 30mm
The iron loss of the test piece of wide 10mm measures.
Fig. 4 is to represent that Se content is to the ratio (x/t) of the amount of subsiding x and thickness of slab t and iron loss W15/50The figure of impact, it addition,
Fig. 5 is to represent that As content is to the ratio (x/t) of the amount of subsiding x and thickness of slab t and iron loss W15/50The figure of impact.From above-mentioned figure permissible
Know, by enabling Se >=0.0001 mass %, As >=0.0005 mass % to reduce the size subsided.This is considered because,
Se and As is cyrystal boundary segregation type element, has the effect weakening grain-boundary strength, so shearing resistance during punch press process diminishes,
And reduction of subsiding.On the other hand, it is also possible to know, if Se ＞ 0.0005 mass %, As ＞ 0.005 mass %, then iron loss characteristic
Significantly deteriorate.This is considered because, if containing a large amount of Se, As, then form a large amount of precipitate, thus magnetic hystersis loss increases.
From above result, in the present invention, add the Se of 0.0001～0.0005 mass % scope, 0.0005～
The As of 0.005 mass % scope.
<experiment 3>
It follows that invention people have carried out the investigation crystallization particle diameter experiment on the impact of the amount of subsiding.
To the C containing 0.0020 mass %, the Si of 2.5 mass %, the Al of 0.001 mass %, the Mn of 0.5 mass %,
The P of 0.01 mass %, the N of 0.0019 mass %, the S of 0.0024 mass %, the Se of 0.0001 mass % and 0.0008 matter
The steel billet of the As of amount % heats 30 points with 1100 DEG C, afterwards, carries out hot rolling and forms the hot rolled plate of thickness of slab 2.0mm, with 1000
DEG C implement the hot rolled plate annealing of 30 seconds, and by 1 time cold rolling and after forming the cold-reduced sheet of thickness of slab 0.35mm, be implemented in 750～
Keep the final annealing of 10 seconds at the various temperature of the scope of 1100 DEG C, thus form the non-oriented magnetic that crystallization particle diameter is different
Steel plate (sheet).
By spacing being set as the punch press process of 5% is chosen from the L direction of the sheet so obtained and C direction
The test piece of long 180mm × wide 30mm and long 180mm × wide 10mm, measures stamping-out end in the way of identical with above-mentioned<experiment 1>
The amount of subsiding in face, and utilize Epstein test to measure iron loss W15/50, and utilize segment method to try to achieve the rolling direction (L of sheet
Direction) the average crystallite particle diameter of section.Additionally, by arrange 3 test pieces in the width direction and to upper in the way of being formed as wide 30mm
The iron loss of the test piece stating wide 10mm measures.
Fig. 6 (a) is to represent the crystallization particle diameter figure on the impact of the ratio (x/t) of the amount of subsiding x and thickness of slab t.From this figure permissible
Know, by make average crystallite particle diameter be below 150 μm can reduce punch press process time the amount of subsiding.This is considered because, if
Crystallization particle diameter diminishes, then the existence frequency of crystal boundary uprises, thus shearing resistance during punch press process diminishes.It addition, Fig. 6 (b) is
Represent that crystallization particle diameter is to iron loss W15/50The figure of impact.If it is recognised that average crystallite particle diameter is below 30 μm, then from this figure
Iron loss W15/50Deterioration.This is considered because, if crystallization particle diameter diminishes, then magnetic hystersis loss becomes big.
From above content it is recognised that the average crystallite particle diameter of the preferred non-oriented electromagnetic steel sheet having of the present invention be 30～
The scope of 150 μm.
It follows that the constituent to the non-oriented electromagnetic steel sheet having (sheet) of the present invention illustrates.
Below C:0.005 mass %
If containing the C having more than 0.005 mass %, then can cause magnetic aging, thus there is the worry of iron loss deterioration.Therefore, C
It it is below 0.005 mass %.
Si:2～7 mass %
Si is to the intrinsic impedance improving steel, reduces the effective element of iron loss, but the effect above is when Si is less than 2 mass %
More weak.On the other hand, if Si is more than 7 mass %, then steel hardening, it is difficult to carry out rolling and manufacture.Therefore, Si is 2～7 mass %
Scope.
Mn:0.03～3 mass %
Mn is for improving the element required for hot-workability, but the effect above is insufficient when Mn is less than 0.03 mass %,
On the other hand, interpolation can cause cost of material to rise more than 3 mass %.Therefore, Mn is the scope of 0.03～3 mass %.
Below Al:3 mass %
Al with Si is identical, is to the intrinsic impedance improving steel, reduces the effective element of iron loss.But, add more than 3 matter
Amount % can cause steel hardening, thus be difficult to rolling and manufacture.Therefore, Al is below 3 mass %.
Below P:0.2 mass %
P is to improve the intrinsic impedance of steel, reducing iron loss and add in the present invention, if but adding more than 0.2 matter
Amount %, then the brittle of steel becomes notable, can cause fracture time cold rolling.Therefore, P is limited to below 0.2 mass %.
Below S:0.005 mass %, below N:0.005 mass %
S and N is all inevitable impurity element, if containing having more than 0.005 mass %, then magnetic characteristic can be made to deteriorate.
Therefore, S and N is limited to below 0.005 mass % respectively.
Se:0.0001～0.0005 mass %, As:0.0005～0.005 mass %
As it has been described above, Se and As is cyrystal boundary segregation type element, weaken grain-boundary strength, when thus there is suppression punch press process
Produce the effect subsided.It is obtained in that above-mentioned by adding the As of more than the Se of more than 0.0001 mass %, 0.0005 mass %
Effect.On the other hand, add the Se more than 0.0005 mass % and the As more than 0.005 mass % and can form a large amount of precipitation
Thing, thus magnetic hystersis loss increases, so iron loss characteristic deterioration.Therefore, Se and As is following scope, Se:0.0001～
0.0005 mass %, As:0.0005～0.005 mass %.
For the non-oriented electromagnetic steel sheet having of the present invention, the remainder in addition to above-mentioned essential component is Fe and not
Evitable impurity.But, for the purpose of improving iron loss characteristic, the Sn and 0.003 of 0.003～0.5 mass % can be added
～0.5 mass % Sb in wantonly a kind or 2 kinds.
Sn and Sb is the suppression oxidation on steel plate top layer, nitridation and the generation with this top layer molecule accompanied, tool
There is the element of the action effect preventing magnetic characteristic from deteriorating.In order to present this effect, contain the most respectively 0.003 mass % with
On.On the other hand, if more than 0.5 mass %, then the growth of crystal grain can be hindered, there is the worry causing magnetic characteristic to deteriorate.Cause
This, preferably Sn and Sb adds the scope of 0.003～0.5 mass % respectively.
It follows that in the present invention the manufacture method of non-oriented electromagnetic steel sheet having is illustrated.
Preferably, the manufacture method of the non-oriented electromagnetic steel sheet having of the present invention is made up of a series of operation, i.e. according to making
Enter with the steel of the constituent to having the above-mentioned present invention of being suitable to such as the conventional refinery operation of converter, electric furnace, vacuum degasser etc.
Row melting, and utilize continuous casting process or agglomeration-piecemeal rolling to form steel billet, afterwards, carries out hot rolling to this steel billet, and according to
Need to carry out hot rolled plate annealing, cold rolling, final annealing, form insulating coating.
In above-mentioned manufacture method, the manufacturing condition before hot rolled plate annealing is not particularly limited, can be according to generally
Known condition manufactures.
It addition, to above-mentioned cold rolling for, can carry out 1 time cold rolling, it is also possible to more than 2 times that carry out clipping intermediate annealing are cold
Roll.It addition, its reduction ratio can also be identical with the manufacturing condition of common non-oriented electromagnetic steel sheet having.
It addition, above-mentioned final annealing is except annealing conditions being set as, average crystallite particle diameter is the preferred scope (30 of the present invention
～150 μm) beyond, it is not particularly limited, as long as implementing on the basis of the annealing conditions of common non-oriented electromagnetic steel sheet having
?.Additionally, for crystallizing size controlling within the above range, annealing temperature is preferably the scope of 770～1050 DEG C, more preferably
It it is the scope of 800～1020 DEG C.
Embodiment
With 1100 DEG C to have the various constituents shown in table 1 steel billets reheat 30/after, carry out hot rolling
And form the hot rolled plate of thickness of slab 2.0mm, after the hot rolled plate annealing implementing 30 seconds with 1000 DEG C, by 1 cold rolling formation table 2
Shown in the cold-reduced sheet of various thicknesss of slab, then, be all implemented at the various temperature shown in table 2 keeping 10 seconds finally move back
Fire, thus form non-oriented electromagnetic steel sheet having (sheet).
[table 1]
[table 2]
By spacing being set as the punch press process of 5% chooses length from the L direction of the sheet so obtained and C direction
The sample of 180mm × wide 30mm and long 180mm × wide 10mm, and utilize Epstein test to measure iron loss W15/50, try to achieve ferrum
Damage deterioration rate.Additionally, for the sample of long 180mm × wide 10mm, the test piece of 3 wide 10mm is arranged as shown in Figure 2 and makees
For the test piece of wide 30mm for measurement.It addition, for said products plate, the amount of subsiding of the end face after punch press process is surveyed
Amount, and utilize segment method to try to achieve the average crystallite particle diameter of rolling direction (L direction) section.
Above-mentioned measurement result is charged in table 2 in the lump.It is recognised that meet the directionless of the condition of the present invention from table 2
Iron loss characteristic before property electromagnetic steel plate not only punch press process is outstanding, and the iron loss characteristic after punch press process is the most outstanding such that it is able to press down
The iron loss characteristic deterioration that punch press process processed causes.
Claims (2)
1. a non-oriented electromagnetic steel sheet having, it is characterised in that
There is following constituent: containing the C below 0.005 mass %, 2～7 mass % Si, 0.03～3 mass % Mn,
S below Al below 3 mass %, the P below 0.2 mass %, 0.005 mass %, the N below 0.005 mass %, 0.0001
～0.0005 Se and 0.0005～the As of 0.005 mass % of mass %, remainder is by Fe and inevitable impurity
Constitute, iron loss W during 50Hz, 1.5T excitation15/50For below 3.5W/kg, and the amount of subsiding x during steelplate punching and thickness of slab t
Being less than 0.15 than (x/t), wherein, the unit of x, t is mm,
Average crystallite particle diameter is 30～150 μm.
Non-oriented electromagnetic steel sheet having the most according to claim 1, it is characterised in that
In addition to described constituent, possibly together with in the Sn and 0.003 of 0.003～0.5 mass %～the Sb of 0.5 mass %
Wantonly a kind or 2 kinds.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012182322A JP5533958B2 (en) | 2012-08-21 | 2012-08-21 | Non-oriented electrical steel sheet with low iron loss degradation by punching |
| JP2012-182322 | 2012-08-21 | ||
| PCT/JP2013/070836 WO2014030512A1 (en) | 2012-08-21 | 2013-08-01 | Non-oriented magnetic steel sheet that exhibits minimal degradation in iron-loss characteristics from a punching process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104302801A CN104302801A (en) | 2015-01-21 |
| CN104302801B true CN104302801B (en) | 2016-11-30 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336242A (en) * | 1989-06-30 | 1991-02-15 | Nkk Corp | Nonoriented silicon steel sheet excellent in magnetic property and its production |
| JP2001323344A (en) * | 2000-05-15 | 2001-11-22 | Kawasaki Steel Corp | Nonoriented silicon steel sheet excellent in workability and recyclability |
| JP2001335897A (en) * | 2000-05-24 | 2001-12-04 | Kawasaki Steel Corp | Nonoriented silicon steel sheet having low core loss and high magnetic flux density and excellent in workability and recyclability |
| CN1887512A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Production process of cold rolled orientation-free electrical steel plate with low iron loss and high magnetic induction |
| CN101343683A (en) * | 2008-09-05 | 2009-01-14 | 首钢总公司 | Method for manufacturing low-iron loss high-magnetic strength non-oriented electrical steel |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336242A (en) * | 1989-06-30 | 1991-02-15 | Nkk Corp | Nonoriented silicon steel sheet excellent in magnetic property and its production |
| JP2001323344A (en) * | 2000-05-15 | 2001-11-22 | Kawasaki Steel Corp | Nonoriented silicon steel sheet excellent in workability and recyclability |
| JP2001335897A (en) * | 2000-05-24 | 2001-12-04 | Kawasaki Steel Corp | Nonoriented silicon steel sheet having low core loss and high magnetic flux density and excellent in workability and recyclability |
| CN1887512A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Production process of cold rolled orientation-free electrical steel plate with low iron loss and high magnetic induction |
| CN101343683A (en) * | 2008-09-05 | 2009-01-14 | 首钢总公司 | Method for manufacturing low-iron loss high-magnetic strength non-oriented electrical steel |
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