CN103526001A - Manufacturing method of cold-rolled non-oriented electrical steel for constant-frequency compressors - Google Patents
Manufacturing method of cold-rolled non-oriented electrical steel for constant-frequency compressors Download PDFInfo
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- CN103526001A CN103526001A CN201310438623.2A CN201310438623A CN103526001A CN 103526001 A CN103526001 A CN 103526001A CN 201310438623 A CN201310438623 A CN 201310438623A CN 103526001 A CN103526001 A CN 103526001A
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Abstract
The invention discloses a manufacturing method of cold-rolled non-oriented electrical steel for constant-frequency compressors, which comprises the following steps: continuously casting molten steel into a sheet blank which is 60-90mm thick, and directly heating the sheet blank in a heating furnace without cooling, wherein the temperature of the heating furnace is 1120-1250 DEG C, and the heating time is 0.4-2.5 hours; carrying out hot rolling on the sheet blank to obtain a hot-rolled sheet which is 2.0-2.5mm thick; and carrying out acid washing, cold rolling, annealing and coating on the hot-rolled sheet to obtain an electrical steel belt finished product which is 0.5mm thick. By adopting the sheet blank continuous-casting continuous-rolling technique, the production cost of the electrical steel is low; by reasonably controlling the composition and proportion of the steel grade, the magnetic properties of the electrical steel finished product are excellent, the iron loss is P1.5/50<=4.9W/Kg, the magnetic induction B5000 is greater than or equal to 1.72T, the magnetic anisotropy is less than or equal to 20%; and thus, the electrical steel can satisfy the use demands for constant-frequency compressors, and enhance the work efficiency of the constant-frequency compressors.
Description
Technical field
The present invention relates to non-oriented electrical steel production field, be specifically related to the manufacture method of cold rolling non-oriented electrical steel for a kind of invariable frequency compressor.
Background technology
Compressor is widely used in the manufacture of air-conditioning, refrigerator.Invariable frequency compressor refers to what compressor rotated with 50Hz frequency, with motor turn and stop controlling temperature, namely rely on it constantly " to open, stop " to adjust temperature.One of invariable frequency compressor is opened one and is easily caused temperature sometimes hot and sometimes cold between stopping, and consumes more electric energy, and this just requires to have for the manufacture of the cold rolling non-oriented electrical steel of invariable frequency compressor the magnetic properties of high magnetic strength, low iron loss.
For the manufacture of the core material of invariable frequency compressor, be at present substantially all si content at 0.9～1.1% cold rolling non-oriented electrical steel, its iron loss P
1.5/50be generally 5.1～5.5W/kg, magnetic strength B
5000be 1.69～1.71T.Owing to promoting the when requirement of Compressor Manufacturing technique of invariable frequency compressor product efficiency, compressor industry has proposed iron loss P
1.5/50≤ 5.0W/kg, magnetic strength B
5000the cold rolling non-oriented electrical steel demand of>=1.71T.
Summary of the invention
The object of the present invention is to provide a kind of invariable frequency compressor user demand that meets, the manufacture method of cold rolling non-oriented electrical steel for the invariable frequency compressor have excellent magnetic characteristics, iron loss being low.
To achieve these goals, the technical solution used in the present invention is:
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 60～90mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is at 1120～1250 ℃, and be 0.4～2.5h heat-up time; Thin slab is made the hot-rolled sheet of 2.0～2.5mm thickness again through hot rolling; Hot-rolled sheet is through pickling, cold rolling, annealing and coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab: C≤0.01,0.7≤Si≤1.2,0.2≤Mn≤0.5,0.04≤P≤0.10,0.1≤Als≤0.4, S≤0.006, N≤0.006, Ti≤0.008, Zr≤0.008, Cu≤0.02, all the other are Fe and inevitable impurity, Mn wherein, S, Als and N content meet Mn/S >=65, Als/N >=45.
The finishing temperature of thin slab hot rolling is at 820～910 ℃, and coiling temperature is at 620～700 ℃.
Hot-rolled sheet pickling adopts chlorohydric acid pickling, and pickling temperature is controlled at 60～90 ℃
Cold rolling employing 4～6 passage rollings, cold rolling total reduction is 75～80%.
Annealing is carried out in continuous annealing furnace, and annealing temperature is 700～850 ℃, and soaking time is 1～4min, and in stove, dew point is controlled at 10～38 ℃.
Coating adopts half organic thick coating, and coated membrane is heavily controlled at 1.2～2.4g/m
2.
The iron loss P of electrical steel strip finished product
1.5/50≤ 4.9W/Kg, magnetic strength B
5000>=1.72T, magneticanisotropy≤20%.
Electrical steel strip finished product under nitrogen protection, after the stress relieving of 750 ℃ of * 2h, iron loss P
1.5/50≤ 4.3W/Kg, magnetic strength B
5000>=1.71T, magneticanisotropy≤15%.
The effect of each chemical composition of thin slab is as follows:
C: the C content in steel is controlled at≤and 0.01%, C is the element that strongly hinders grain growth, causes that iron loss increases and magnetic aging, surpassing 0.01% will bring serious burden to the decarburization of continuous annealing.
Si:0.7%≤Si≤1.2%, Si increases resistance element, is the most important alloying element of electrical steel, surpasses 1.2% and will make electrical steel magnetic strength reduce, and is difficult to meet B
5000the requirement of>=1.72T; If Si content is less than 0.7%, iron loss P
1.5/50the requirement of meet being difficult to≤4.9W/Kg.
Mn:0.2%≤Mn≤0.5%, Mn not only can improve the resistivity of steel band, reduces the effect of iron loss, and Mn also improves the cold rolling performance of steel band, the tissue of even finished product steel belt.If Mn is lower than 0.2%, the magnetic property of electrical steel is bad, if Mn higher than 0.5%, the smelting cost of electrical steel increases, economy is not good.
P:0.04%≤P≤0.10%, P is larger to the embrittling effect of non-oriented electrical steel steel band, and along with the rising of Si+Al content, this embrittling effect is stronger; P content is lower than 0.04%, and the processibility of steel plate is bad, and punching burr is large, if but P content makes steel plate cold-workability deteriorated over 0.1% on the contrary.
Als:0.1%≤Als≤0.4%, Al increases resistance element, is one of most important alloying element of electrical steel, and if lower than 0.1%, the magnetic property of electrical steel is bad, and surpasses 0.4%, and the smelting cost of electrical steel increases, and steel plate processibility is deteriorated, and magnetic strength reduces.
Below S:0.006%, surpass 0.006% and will make the S compound amounts of separating out such as MnS greatly increase, strongly hinder grain growth, iron loss is deteriorated.
Below N:0.006%, surpass 0.006% and will make the nitride amounts of separating out such as AlN greatly increase, strongly hinder grain growth, iron loss is deteriorated.
Ti, Zr: be all less than 0.008%, Ti, Zr are very large on the electromagnetic performance impact of non-oriented electrical steel, the strong grain growth that hinders, especially increase substantially iron loss, Ti in steel, Zr content are more low better in principle, but from the angle of steel-making cost and operability, the Ti in steel, Zr content should be controlled at below 0.008%.
Below Cu:0.02%, for cold rolling non-oriented electrical steel, if Cu surpasses 0.02%, in course of hot rolling, can form a large amount of CuS precipitates, electrical steel magnetic property is reduced.
Mn/S ratio: >=65, if Mn/S ratio is less than 65, in non-oriented electrical steel, MnS precipitate particle diameter is tiny, and electrical steel magnetic property is had to deterioration effect.
Als/N ratio: >=45, if Als/N ratio is less than 45, in non-oriented electrical steel, AlN precipitate particle diameter is tiny, and electrical steel magnetic property is reduced.
The invention has the advantages that: the present invention adopts continuous casting and rolling technique of sheet bar, strand without cooling and direct soaking after hot rolling, rhythm of production is compact, saving heat energy, production cost is lower; By reasonable component, design and processing parameter is controlled, guaranteed that production board has good magnetic property, the magnetic property of electrical steel finished product is excellent, iron loss P1.5/50≤4.9W/Kg, magnetic strength B5000 >=1.72T, magneticanisotropy≤20%, can meet the user demand of invariable frequency compressor, improves its working life.Downstream user adopts the iron loss P1.5/50≤4.3W/Kg of electrical steel of the present invention after stress relieving, magnetic strength B5000 >=1.71T, magneticanisotropy≤15%.
Embodiment
Description below by optimum embodiment, is described in further detail the specific embodiment of the present invention.
Embodiment 1
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 90mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is 1200 ℃, and be 0.5h heat-up time; Through hot rolling, make again the hot-rolled sheet of 2.0mm thickness; Hot-rolled sheet is through overpickling, cold rolling, annealing, coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab is C:0.0030, Si:0.92, and Mn:0.3, P:0.07, Als:0.35, S:0.0045, N:0.0042, Ti:0.0030, Zr:0.0025, Cu:0.015, all the other are Fe and inevitable impurity; The finishing temperature of hot rolling is 890 ℃, and coiling temperature is 620 ℃; Chlorohydric acid pickling temperature is 85 ℃; Cold rolling 5 passages are rolled to 0.5mm thickness, and total reduction is 75%; Annealing temperature is 820 ℃, soaking time 2.5min, and in stove, dew point is 30 ℃; The film of half organic thick coating is heavily 1.3g/m
2.
The iron loss P of the electrical steel finished product of making through above-mentioned technique
1.5/50for 4.8W/Kg, magnetic strength B
5000for 1.73T, magneticanisotropy is 12.5%.Through N
2after the stress relieving of protection, 750 ℃ of * 2h, the iron loss P of electrical steel
1.5/50for 4.2W/Kg, magnetic strength B
5000for 1.73T, magneticanisotropy 9.5%.
Embodiment 2
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 60mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is 1180 ℃, and be 1h heat-up time; Through hot rolling, make again the hot-rolled sheet of 2.5mm thickness; Hot-rolled sheet is through overpickling, cold rolling, annealing, coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab is C:0.0085, Si:1.05, and Mn:0.28, P:0.09, Als:0.31, S:0.0032, N:0.0028, Ti:0.0045, Zr:0.0030, Cu:0.012, all the other are Fe and inevitable impurity; The finishing temperature of hot rolling is 860 ℃, and coiling temperature is 690 ℃; Chlorohydric acid pickling temperature is 80 ℃; Cold rolling 6 passages are rolled to 0.5mm thickness, and total reduction is 80%; Annealing temperature is 790 ℃, soaking time 3.0min, and in stove, dew point is 38 ℃; The film of half organic thick coating is heavily 2.4g/m
2.
The iron loss P of the electrical steel finished product of making through above-mentioned technique
1.5/50for 4.5W/Kg, magnetic strength B
5000for 1.72T, magneticanisotropy is 13.2%.Through N
2after the stress relieving of protection, 750 ℃ of * 2h, the iron loss P of electrical steel
1.5/50for 3.9W/Kg, magnetic strength B
5000for 1.72T, magneticanisotropy 10.2%.
Embodiment 3
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 70mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is 1150 ℃, and be 0.5h heat-up time; Through hot rolling, make again the hot-rolled sheet of 2.5mm thickness; Hot-rolled sheet is through overpickling, cold rolling, annealing, coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab is C:0.0062, Si:1.20, and Mn:0.32, P:0.08, Als:0.40, S:0.0025, N:0.0031, Ti:0.0055, Zr:0.0015, Cu:0.010, all the other are Fe and inevitable impurity; The finishing temperature of hot rolling is 870 ℃, and coiling temperature is 700 ℃; Chlorohydric acid pickling temperature is 82 ℃; Cold rolling 6 passages are rolled to 0.5mm thickness, and total reduction is 80%; Annealing temperature is 850 ℃, soaking time 2.5min, and in stove, dew point is 31 ℃; The film of half organic thick coating is heavily 2.0g/m
2.
The iron loss P of the electrical steel finished product of making through above-mentioned technique
1.5/50for 4.4W/Kg, magnetic strength B
5000for 1.72T, magneticanisotropy is 12.5%.Through N
2after the stress relieving of protection, 750 ℃ of * 2h, the iron loss P of electrical steel
1.5/50for 3.7W/Kg, magnetic strength B
5000for 1.71T, magneticanisotropy 10.5%.
Embodiment 4
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 75mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is 1130 ℃, and be 1h heat-up time; Through hot rolling, make again the hot-rolled sheet of 2.5mm thickness; Hot-rolled sheet is through overpickling, cold rolling, annealing, coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab is C:0.0032, Si:0.98, and Mn:0.30, P:0.04, Als:0.25, S:0.0030, N:0.0035, Ti:0.0035, Zr:0.0015, Cu:0.009, all the other are Fe and inevitable impurity; The finishing temperature of hot rolling is 870 ℃, and coiling temperature is 650 ℃; Chlorohydric acid pickling temperature is 75 ℃; Cold rolling 6 passages are rolled to 0.5mm thickness, and total reduction is 80%; Annealing temperature is 850 ℃, soaking time 2.5min, and in stove, dew point is 10 ℃; The film of half organic thick coating is heavily 1.8g/m
2.
The iron loss P of the electrical steel finished product of making through above-mentioned technique
1.5/50for 4.8W/Kg, magnetic strength B
5000for 1.72T, magneticanisotropy is 12.5%.Through N
2after the stress relieving of protection, 750 ℃ of * 2h, the iron loss P of electrical steel
1.5/50for 4.1W/Kg, magnetic strength B
5000for 1.72T, magneticanisotropy 9.5%.
Embodiment 5
The manufacture method of cold rolling non-oriented electrical steel for this invariable frequency compressor, molten steel continuous casting becomes the thin slab of thickness 80mm, and thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is 1120 ℃, and be 2.5h heat-up time; Through hot rolling, make again the hot-rolled sheet of 2.2mm thickness; Hot-rolled sheet is through overpickling, cold rolling, annealing, coating and make the electrical steel strip finished product of 0.5mm thickness.
The chemical component weight per-cent of thin slab is C:0.0025, Si:1.00, and Mn:0.50, P:0.10, Als:0.15, S:0.0055, N:0.0020, Ti:0.0065, Zr:0.0010, Cu:0.005, all the other are Fe and inevitable impurity; The finishing temperature of hot rolling is 910 ℃, and coiling temperature is 620 ℃; Chlorohydric acid pickling temperature is 70 ℃; Cold rolling 5 passages are rolled to 0.5mm thickness, and total reduction is 77.3%; Annealing temperature is 750 ℃, soaking time 4.0min, and in stove, dew point is 10 ℃; The film of half organic thick coating is heavily 1.6g/m
2.
The iron loss P of the electrical steel finished product of making through above-mentioned technique
1.5/50for 4.7W/Kg, magnetic strength B
5000for 1.73T, magneticanisotropy is 10.8%.Through N
2after the stress relieving of protection, 750 ℃ of * 2h, the iron loss P of electrical steel
1.5/50for 4.2W/Kg, magnetic strength B
5000for 1.73T, magneticanisotropy 10.5%.
Obviously specific implementation of the present invention is not subject to the restrictions described above, as long as adopted the improvement of the various unsubstantialities that method design of the present invention and technical scheme carry out, all within protection scope of the present invention.
Claims (9)
1. the manufacture method of cold rolling non-oriented electrical steel for an invariable frequency compressor, it is characterized in that: molten steel continuous casting becomes the thin slab of 60～90mm thickness, thin slab is without cooling and directly enter process furnace heating, and the temperature of process furnace is at 1120～1250 ℃, and be 0.4～2.5h heat-up time; Thin slab is made the hot-rolled sheet of 2.0～2.5mm thickness again through hot rolling; Hot-rolled sheet is through pickling, cold rolling, annealing and coating and make the electrical steel strip finished product of 0.5mm thickness.
2. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 1, is characterized in that: the chemical component weight per-cent of thin slab: C≤0.01,0.7≤Si≤1.2,0.2≤Mn≤0.5,0.04≤P≤0.10,0.1≤Als≤0.4, S≤0.006, N≤0.006, Ti≤0.008, Zr≤0.008, Cu≤0.02, all the other are Fe and inevitable impurity, and Mn wherein, S, Als and N content meet Mn/S >=65, Als/N >=45.
3. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 1 or 2, is characterized in that: the finishing temperature of thin slab hot rolling is at 820～910 ℃, and coiling temperature is at 620～700 ℃.
4. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 3, is characterized in that: hot-rolled sheet pickling adopts chlorohydric acid pickling, and pickling temperature is controlled at 60～90 ℃
5. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 4, is characterized in that: cold rolling employing 4～6 passage rollings, cold rolling total reduction is 75～80%.
6. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 5, is characterized in that: annealing is carried out in continuous annealing furnace, and annealing temperature is 700～850 ℃, and soaking time is 1～4min, and in stove, dew point is controlled at 10～38 ℃.
7. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 6, is characterized in that: coating adopts half organic thick coating, and coated membrane is heavily controlled at 1.2～2.4g/m
2.
8. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 7, is characterized in that: the iron loss P of electrical steel strip finished product
1.5/50≤ 4.9W/Kg, magnetic strength B
5000>=1.72T, magneticanisotropy≤20%.
9. the manufacture method of cold rolling non-oriented electrical steel for invariable frequency compressor as claimed in claim 8, is characterized in that: electrical steel strip finished product under nitrogen protection, after the stress relieving of 750 ℃ of * 2h, iron loss P
1.5/50≤ 4.3W/Kg, magnetic strength B
5000>=1.71T, magneticanisotropy≤15%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119686A (en) * | 2016-06-27 | 2016-11-16 | 马鞍山钢铁股份有限公司 | A kind of cold rolling non-oriented electrical steel and production method thereof |
| CN110643891A (en) * | 2018-06-26 | 2020-01-03 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetic property and manufacturing method thereof |
| CN115404410A (en) * | 2022-09-23 | 2022-11-29 | 马鞍山钢铁股份有限公司 | Non-oriented silicon steel with excellent magnetic performance after stress relief annealing and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275198A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Middle code non-oriented electrical steel with fine surface and manufacturing method thereof |
| CN101348852A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing oriented electrical steel by low temperature slab heating |
| CN103205547A (en) * | 2013-04-11 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Method for preparing batch annealing low-grade non-oriented electrical steel |
-
2013
- 2013-09-24 CN CN201310438623.2A patent/CN103526001B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275198A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Middle code non-oriented electrical steel with fine surface and manufacturing method thereof |
| CN101348852A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing oriented electrical steel by low temperature slab heating |
| CN103205547A (en) * | 2013-04-11 | 2013-07-17 | 内蒙古包钢钢联股份有限公司 | Method for preparing batch annealing low-grade non-oriented electrical steel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106119686A (en) * | 2016-06-27 | 2016-11-16 | 马鞍山钢铁股份有限公司 | A kind of cold rolling non-oriented electrical steel and production method thereof |
| CN110643891A (en) * | 2018-06-26 | 2020-01-03 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetic property and manufacturing method thereof |
| CN110643891B (en) * | 2018-06-26 | 2021-03-12 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with excellent magnetic property and manufacturing method thereof |
| CN115404410A (en) * | 2022-09-23 | 2022-11-29 | 马鞍山钢铁股份有限公司 | Non-oriented silicon steel with excellent magnetic performance after stress relief annealing and manufacturing method thereof |
| CN115404410B (en) * | 2022-09-23 | 2024-01-16 | 马鞍山钢铁股份有限公司 | Non-oriented silicon steel with excellent magnetic performance after stress relief annealing and manufacturing method thereof |
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