CN107723590A - A kind of transformer cold-rolled orientation electrical sheet and its production method - Google Patents
A kind of transformer cold-rolled orientation electrical sheet and its production method Download PDFInfo
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- CN107723590A CN107723590A CN201710900228.XA CN201710900228A CN107723590A CN 107723590 A CN107723590 A CN 107723590A CN 201710900228 A CN201710900228 A CN 201710900228A CN 107723590 A CN107723590 A CN 107723590A
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- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1266—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest between cold rolling steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention provides a kind of transformer cold-rolled orientation electrical sheet and its production method, contains following percentage by weight element：0.05%≤C≤0.07%, 3.3%≤Si≤3.5%, 0.15%≤Mn≤0.40%, P≤0.02%, 0.40%≤Als≤0.50%, 0.06%≤Cu≤0.08%, 0.005%≤S≤0.010%, 0.010%≤N≤0.015%, Ti≤0.002%, remaining is Fe and inevitable impurity.Compared with prior art, present invention employs conventional hot rolling technology, Cu is utilized2S ﹢ MnS ﹢ AlN produce the electric steel plate that rolling direction has excellent magnetic characteristics as inhibitor, and the magnetic property of electrical sheet finished product rolling direction is excellent, and iron loss is low, magnetic strength is high, and magnetic property fluctuates small, its iron loss P1.7/50≤ 1.30W/kg, B8≥1.80T。
Description
Technical field
The invention belongs to oriented electrical steel production technical field, more particularly to a kind of transformer cold-rolled orientation electrical sheet
And its production method.
Background technology
Cold-rolled orientation electrical sheet is largely used to manufacture transformer etc..Transformer is very high to the magnetic property requirements of electrical sheet, right
The magnetic property of rolling direction has very strict requirements.
With being growing more intense for Electrical Steel In China market competition, cold-rolled orientation electrical sheet is produced to meet downstream function admirable
Transformer user strict demand it is just very necessary.
The content of the invention
It is an object of the invention to provide a kind of transformer cold-rolled orientation electrical sheet, by control the chemistry in steel into
Divide, obtain the oriented electric product made from steel of rolling direction function admirable, the 0.35mm oriented electrical steel finished product iron loss P of manufacture1.7/50
≤ 1.30W/kg, B8≥1.80T。
A kind of production method present invention also offers transformer with cold-rolled orientation electrical sheet, according to formula design technology,
Product property is stable, function admirable.
A kind of transformer cold-rolled orientation electrical sheet provided by the invention, contains following percentage by weight element：
0.05%≤C≤0.07%, 3.3%≤Si≤3.5%, 0.15%≤Mn≤0.40%, P≤0.02%,
0.40%≤Als≤0.50%, 0.06%≤Cu≤0.08%, 0.005%≤S≤0.010%, 0.010%≤N≤
0.015%, Ti≤0.002%, remaining is Fe and inevitable impurity.
Preferably, transformer cold-rolled orientation electrical sheet, following percentage by weight element is contained：
C：0.055%, Si：3.35%, Mn：0.24%, P：0.008%, Als：0.48%, Cu：0.065%, S：
0.0088%, N:0.012%, Ti：0.0012%, remaining is Fe and inevitable impurity.
Preferably, transformer cold-rolled orientation electrical sheet, following percentage by weight element is contained：
C：0.068%, Si：3.45%, Mn：0.32%, P：0.015%, Als：0.42%, Cu：0.073%, S：
0.0076%, N:0.011%, Ti：0.0015%, remaining is Fe and inevitable impurity.
A kind of transformer production method of cold-rolled orientation electrical sheet provided by the invention, comprises the following steps：
1) add each alloy element by formula to be refined into RH stoves and Alloying Treatment, the steel after RH stoves are refined
Water direct casting is into slab；
2) after slab cooling, into heating stove heat；
And then hot rolling 3)；
4) through overpickling after hot rolling；
5) once cold rolling；
6) decarburizing annealing；
7) secondary cold-rolling；
8) MgO interleaving agents coat；
9) high temperature bell-type annealing.
Slab cooling enters heating furnace not less than 500 DEG C in step 2).
For heating furnace computer heating control temperature at 1250~1350 DEG C, the heating and thermal insulation time is not less than 3.5h in step 2).
The finishing temperature of hot rolling described in step 3) is at 940~960 DEG C, and coiling temperature is at 520~540 DEG C；It is rolled into 2.0
The hot rolled plate of~2.5mm thickness；Using the C-shaped of above-mentioned content into austenitic area, make Cu2S ﹢ MnS ﹢ AlN are substantially soluble in matrix and done
Suppress the growth of hot rolling crystal grain for inhibitor.
Pickling chlorohydric acid pickling described in step 4), pickling temperature are 70~90 DEG C.
Once cold rolling described in step 5) is carried out on reversable mill, and 5~6 passes, the total reduction of cold rolling is 60
~80%；
Decarburizing annealing described in step 6), carried out in continuous annealing furnace, annealing temperature is 860~880 DEG C, soaking time
For 10~40min, decarburization to below 30ppm；
Secondary cold-rolling described in step 7) is carried out on reversable mill, 3~4 passes, the total reduction of secondary cold-rolling
40~60%；
MgO interleaving agents described in step 8) is coated, and utilizes MgO coatings, 480~510 DEG C of drying temperature；
High temperature bell-type annealing described in step 9), carried out in bell type annealing furnace, annealing temperature is 1150~1200 DEG C, is protected
The warm time is 5~10h；
After high temperature bell-type annealing, carry out applying insulating coating and stretching and leveling annealing on planisher, it is smooth using under constant pressure
Rate Schema control, reduction ratio are 6%~8%.
Further, the transformer of production cold-rolled orientation electrical sheet thickness 0.35mm.
Further, the transformer of production cold-rolled orientation electrical sheet iron loss P1.7/50≤ 1.30W/kg, B8≥1.80T。
Present invention control each element content is act as：0.05%≤C≤0.07%, it is therefore an objective in hot rolled plate high temperature normalizing
Guarantee has a number of γ-phase, can obtain a large amount of tiny AlN during rapid cooling because nitrogen in γ-phase solid solubility ratio in α-phase
It is big 10 times.C exists to be dissolved carbon and tiny ε-carbide morphology after Hot Rolled Plate Normalizing, pinning dislocation during cold rolling, and dislocation density is bright
Aobvious to increase, processing hardening faster, during annealing recrystallizes raw nuclear location and increased, and first uniform small grains, promotes secondary recrystallization
Development.Si is important magnetic material, when often increasing 0.1%Si, iron loss P1.7/50Reduction 0.019W/kg, 3.3%≤Si≤
3.5% content, electricalresistivityρ can be increased, iron loss P1.7/50Reduce.Mn, S form the important inhibitor that MnS is orientation silicon steel,
MnS Precipitation Temperatures when can properly increase heating-up temperature and hot rolling, the thicker AlN quantity separated out in course of hot rolling is reduced,
Analysis strengthens rejection ability than more tiny AlN during normalizing after ensureing.The content of 0.15%≤Mn≤0.40% reduces strand
Middle lightning shape crackle.Manganese, sulphur or [Mn%] × [S%] products are too high, and MnS is excessively thick in strand, and heating-up temperature improves, crystal grain
Roughening, hot rolling part and magnetic reduce.Als, N form the major inhibitors that AlN is orientation silicon steel, and Als and N content are too low,
The tiny AlN lazy weights separated out after normalizing, secondary recrystallization are incomplete.Als is or important magnetic material, can be notable
Reduce iron loss P1.7/50.P has reinforcement rejection ability, plays the role of to improve MnS+A1N scheme orientation silicon steel magnetic.P content is low simultaneously
Make in hot rolled plate MnS branches evenly, magnetic is good and stably.
In Technology for Heating Processing of the present invention, heating of plate blank, hot rolling technology are in order to which material obtains more preferable plasticity, are advantageous to add
Work rolls；Cold rolling reaches the thickness of requirement while material surface quality is ensured.Primary recrystallization is completed in decarburizing annealing, makes base
There is sufficient amount of (110) [001] first crystal grain (secondary nucleus) in body and be advantageous to the primary recrystallization that they grow up and knit
Structure and tissue；Carbon in steel is taken off to less than 0.003%, developed perfect in single α-phase during high annealing after ensureing
Sulphur and nitrogen in secondary recrystallization tissue and removal steel, and eliminate the magnetic aging of product；Steel strip surface forms the SiO of dense uniform2
Film (2~3 μ m-thick).The purpose of applying MgO is to prevent from being bonded during the coiled high annealing of steel band；When high annealing is raised to about 1000 DEG C
MgO and steel strip surface SiO2Oxide-film chemically reactive (2MgO+SiO2→Mg2SiO4), form magnesium silicate glass film bottom；It is high
Promote desulfurization and denitrification reaction during temperature purification annealing.The purpose of high annealing is to be warming up to 850~1050 DEG C to tie again by secondary
Crystalline substance forms single (110) [001] texture；1000~1100 DEG C are warming up to by SiO in MgO and surface film oxide2Play chemistry
Reaction, form Mg2SiO4(magnesium silicate or fayalite) glass film bottom；Insulation carries out purification and moved back at a temperature of 1180 ± 20 DEG C
Fire, sulphur and nitrogen in steel are removed, while subgrain is annexed scattered remaining first crystal grain, subgrain tissue is more complete, brilliant
Boundary is more straight.After secondary recrystallization is basically completed, the advantageous effect of inhibitor has terminated and decomposed.The sulphur and pyridine body decomposited
Magnetic and bendability are harmful to, it is necessary to remove in high annealing.Smooth stretching annealing main purpose is scrubbed and 70 by water
DEG C 5%H2SO4Light pickling removes the MgO and other dirts of remained on surface, makes surface activation, applied after drying coatings and
In 500 DEG C of drying of ＜；Appropriate tension force is added to be sintered through about 800 DEG C of smooth stretching annealing and by insulating coating under nitrogen in continuous oven
It is good.
Compared with prior art, present invention employs conventional hot rolling technology, Cu is utilized2S ﹢ MnS ﹢ AlN as inhibitor and
The electric steel plate that rolling direction has excellent magnetic characteristics is produced, the magnetic property of electrical sheet finished product rolling direction is excellent, and iron loss is low, magnetic strength
Height, and magnetic property fluctuates small, its iron loss P1.7/50≤ 1.30W/kg, B8≥1.80T。
Brief description of the drawings
Fig. 1 is the hot rolling microstructure of embodiment 1.
Embodiment
Embodiment 1
A kind of transformer production method of cold-rolled orientation electrical sheet, comprises the following steps：
1) add each alloy element by formula to be refined into RH stoves and Alloying Treatment, the steel after RH stoves are refined
Water continuously pours the slab into thickness 230mm with core pressure；The chemical component weight percentage of slab is C：0.055%, Si：
3.35%, Mn：0.24%, P：0.008%, Als：0.48%, Cu：0.065%, S：0.0088%, N:0.012%, Ti：
0.0012%, remaining is Fe and inevitable impurity；
2) slab is cooled to 650 DEG C and enters heating furnace heating and thermal insulations, and the temperature of heating furnace is at 1280 DEG C, the heating and thermal insulation time
For 4.0h；
3) hot rolled plate of the 5 passage roughing with seven frame continuous rollings into 2.2mm thickness is passed through again；The finishing temperature of hot rolling is
955 DEG C, coiling temperature is 540 DEG C；
4) hot rolled plate passes through chlorohydric acid pickling, and temperature is 80 DEG C；
5) and then once cold rolling, specially 5 passages are rolled to 0.6mm thickness, and the total reduction of once cold rolling is 72.7%
(2.2mm hot rolled plate is rolled into 0.6mm thickness, and reduction ratio is 60~80%)；
6) and then decarburizing annealing, it is specially：Decarburization annealing temperature is 865 DEG C, soaking time 30min；Decarburization to 30ppm with
Under；
7) secondary cold-rolling again, it is specially：4 passages are rolled to 0.35mm thickness, and the total reduction of secondary cold-rolling is 41.7%；
8) and then the coating of MgO interleaving agents, MgO interleaving agents coat 500 DEG C of drying temperature；
9) high temperature bell-type annealing high temperature bell-type annealing temperature is 1180 DEG C again, soaking time 6h；
10) finally, insulating coating and stretching and leveling and the oriented electrical steel strip finished product of 0.35mm thickness is made；Stretching and leveling
Reduction ratio is 6%.
The cold-rolled orientation electrical steel strip excellent surface quality manufactured through above-mentioned technique, the rolling direction iron loss P of finished product1.7/50
For 1.28W/kg, magnetic strength B8It is excellent for 1.80T, magnetic property.
Embodiment 2
A kind of transformer production method of cold-rolled orientation electrical sheet, comprises the following steps：
1) add each alloy element by formula to be refined into RH stoves and Alloying Treatment, the steel after RH stoves are refined
Water continuously pours the slab into thickness 230mm with core pressure；The chemical component weight percentage of slab is C：0.068%, Si：
3.45%, Mn：0.32%, P：0.015%, Als：0.42%, Cu：0.073%, S：0.0076%, N:0.011%, Ti：
0.0015%, remaining is Fe and inevitable impurity；
2) slab is cooled to 610 DEG C and enters heating furnace heating and thermal insulations, and the temperature of heating furnace is at 1300 DEG C, the heating and thermal insulation time
For 3.5h；
3) hot rolled plate of the 5 passage roughing with seven frame continuous rollings into 2.2mm thickness is passed through again；The finishing temperature of hot rolling is
945 DEG C, coiling temperature is 525 DEG C；
4) hot rolled plate is specially through overpickling：Chlorohydric acid pickling temperature is 86 DEG C；
5) and then once cold rolling, it is specially：5 passages are rolled to 0.6mm thickness, and the total reduction of once cold rolling is 72.7%；
6) decarburizing annealing again, decarburization annealing temperature are 875 DEG C, soaking time 15min；
7) and then secondary cold-rolling, the passage of secondary cold-rolling 4 are rolled to 0.35mm thickness, and the total reduction of secondary cold-rolling is
41.7%；
8) then, MgO interleaving agents coat, MgO interleaving agents 485 DEG C of drying temperature of coating；
9) high temperature bell-type annealing, annealing temperature are 1160 DEG C again, soaking time 8h；
10) finally, insulating coating and stretching and leveling and the oriented electrical steel strip finished product of 0.35mm thickness is made；Stretching and leveling
Reduction ratio is 7%.
The cold-rolled orientation electrical steel strip excellent surface quality manufactured through above-mentioned technique, the rolling direction iron loss P of finished product1.7/50
For 1.25W/kg, magnetic strength B8It is excellent for 1.81T, magnetic property.
Claims (10)
- A kind of 1. transformer cold-rolled orientation electrical sheet, it is characterised in that the transformer cold-rolled orientation electrical sheet contain with Lower percentage by weight element：0.05%≤C≤0.07%, 3.3%≤Si≤3.5%, 0.15%≤Mn≤0.40%, P≤0.02%, 0.40%≤ Als≤0.50%, 0.06%≤Cu≤0.08%, 0.005%≤S≤0.010%, 0.010%≤N≤0.015%, Ti≤ 0.002%, remaining is Fe and inevitable impurity.
- A kind of 2. production method of the transformer cold-rolled orientation electrical sheet described in claim 1, it is characterised in that the life Production method comprises the following steps：1) refined by each alloy element of formula addition into RH stoves and Alloying Treatment, the molten steel after RH stoves are refined connect It is continuous to be cast into slab；2) after slab cooling, into heating stove heat；And then hot rolling 3)；4) through overpickling after hot rolling；5) once cold rolling；6) decarburizing annealing；7) secondary cold-rolling；8) MgO interleaving agents coat；9) high temperature bell-type annealing.
- 3. production method according to claim 2, it is characterised in that heating furnace computer heating control temperature is 1250 in step 2) ~1350 DEG C, the heating and thermal insulation time is not less than 3.5h.
- 4. the production method according to Claims 2 or 3, it is characterised in that the finishing temperature of hot rolling described in step 3) exists 940~960 DEG C, coiling temperature is at 520~540 DEG C；It is rolled into the hot rolled plate of 2.0~2.5mm thickness.
- 5. according to the production method described in claim any one of 2-4, it is characterised in that once cold rolling described in step 5) is can Carried out on inverse milling train, 5~6 passes, the total reduction of cold rolling is 60~80%.
- 6. according to the production method described in claim any one of 2-5, it is characterised in that decarburizing annealing described in step 6), Carried out in continuous annealing furnace, annealing temperature is 860~880 DEG C, and soaking time is 10~40min, decarburization to below 30ppm.
- 7. according to the production method described in claim any one of 2-6, it is characterised in that secondary cold-rolling described in step 7) is can Carried out on inverse milling train, 3~4 passes, the total reduction of secondary cold-rolling is 40~60%.
- 8. according to the production method described in claim any one of 2-7, it is characterised in that high temperature bell-type described in step 9) moves back Fire, carried out in bell type annealing furnace, annealing temperature is 1150~1200 DEG C, and soaking time is 5~10h.
- 9. according to the production method described in claim any one of 2-8, it is characterised in that MgO interleaving agents described in step 8) is applied Cover, utilize MgO coatings, 480~510 DEG C of drying temperature.
- 10. according to the production method described in claim any one of 2-9, it is characterised in that the transformer cold-rolled orientation of production Electrical sheet iron loss P1.7/50≤ 1.30W/kg, B8≥1.80T。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109825775A (en) * | 2019-04-04 | 2019-05-31 | 中山市中圣金属板带科技有限公司 | A kind of cold rolling non-oriented electrical steel 35WD1900 and its production method |
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| CN103938072A (en) * | 2014-04-10 | 2014-07-23 | 马钢(集团)控股有限公司 | Electrical steel plate and production method thereof |
| CN106048411A (en) * | 2016-06-27 | 2016-10-26 | 马鞍山钢铁股份有限公司 | Cold-rolled oriented electrical steel for transformer and production method of cold-rolled oriented electrical steel |
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| CN103938072A (en) * | 2014-04-10 | 2014-07-23 | 马钢(集团)控股有限公司 | Electrical steel plate and production method thereof |
| CN106399819A (en) * | 2016-06-16 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Oriented silicon steel and preparing method thereof |
| CN106048411A (en) * | 2016-06-27 | 2016-10-26 | 马鞍山钢铁股份有限公司 | Cold-rolled oriented electrical steel for transformer and production method of cold-rolled oriented electrical steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825775A (en) * | 2019-04-04 | 2019-05-31 | 中山市中圣金属板带科技有限公司 | A kind of cold rolling non-oriented electrical steel 35WD1900 and its production method |
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Application publication date: 20180223 |