CN103320687A - High-strength magnetic-conductive steel plate and production method thereof - Google Patents
High-strength magnetic-conductive steel plate and production method thereof Download PDFInfo
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Abstract
The invention discloses a high-speed magnetic-conductive steel plate with a main component of Fe and other components such as Mn, Si, P, S, Als, Nb, and Ti. The steel plate comprises the contents of, by mass: no more than 0.09% of C, no less than 0.09% and less than 0.40% of Mn, 0.45% of Si, no less than 0.05% and no more than 0.15% of P, no morethan 0.012% of S, no less than 0.02% and no more than 0.15 of Als, no less than 0.01% and no more than 0.005% of Nb, no more than 0.005% of Ti, and inevitable impurities. The invention also discloses a production method of the steel plate. With the technical scheme provided by the invention, through the control over smelting chemical components and a proper process, the cold-rolled annealed steel plate with high mechanical performance and good direct-current magnetic performance is obtained. The cold-rolled steel plate has high yield strength and magnetic conductivity. When the steel plate is in use, the steel plate can endure high load and is prevented from deformation.
Description
Technical field
The invention belongs to the technical field of metallurgical industry product and production thereof, relate to steel plate steel band product and production method thereof.More particularly, the present invention relates to the production method of a kind of high strength magnetic conduction steel plate and this steel plate.
Background technology
The magnetic field occasion is set up in application for needs, and the method that improves magneticstrength is to adopt magnetically permeable material to amplify magneticstrength.The force intensity of bringing along with increase or the motion of magneticstrength that is subjected to increases, and needs magnetically permeable material to possess dual at least performance, namely requires magnetically permeable material to have high magnetic induction density and high intensity index.
The intensity that improves material generally is to add alloy element or undergo phase transition by thermal treatment to obtain high strength mutually or cause high density dislocation or intergranular precipitation takes place and strengthen.The adding of alloy element can improve the strength of materials, plasticity and toughness simultaneously, the excessive remarkable reduction magnetic property of cheap alloy element addition, and thermal treatment undergoes phase transition and obtains high strength mutually or cause high density dislocation to relate to thermal treatment process control.Simultaneously, in most cases, thermal treatment process need be added the cooperation of alloy element.
Have high magnetic induction density and intensity index in order to obtain magnetically permeable material, English Patent GB1351884 improves the method for carbon, manganese and silicone content by alloying.Though the method for English Patent GB1351884 has obtained the high strength index, magnetic induction density obviously reduces.The method of Chinese patent CN200610019771.0, CN200610019772.5 and CN200610019773.X need be at steel billet cooling back reheat, for intensity, the high magnetic induction density of maintenance that improves magnetically permeable material, be to increase manganese and niobium by alloying, different additions by manganese and niobium, control suitable hot rolling and cold rolled annealed Technology, obtain high mechanical property (intensity index), what magnetic induction density reduced simultaneously lacks as far as possible.
Summary of the invention
The invention provides a kind of high strength magnetic conduction steel plate, its objective is to obtain good magnetic performance and mechanical property.
To achieve these goals, the technical scheme taked of the present invention is:
High strength magnetic conduction steel plate provided by the present invention, main component is Fe, also comprise C, Mn, Si, P, S, Als, Nb, Ti, it is characterized in that: calculate by mass percentage, the content of mentioned component is: C≤0.09,0.09≤Mn＜0.40, Si≤0.45,0.05≤P≤0.15, S≤0.012,0.02≤Als≤0.15,0.01≤Nb≤0.04, Ti≤0.005, and unavoidable impurities.
Optimal technical scheme one:
Calculate by mass percentage, the content of mentioned component is: C:0.045, Mn:0.26, Si:0.123, P:0.118, S:0.006, Als:0.05, Nb:0.027, Ti:0.0021.
Optimal technical scheme two:
Calculate by mass percentage, the content of mentioned component is: C:0.019, Mn:0.20, Si:0.083, P:0.136, S:0.004, Als:0.027, Nb:0.024, Ti:0.0018.
Optimal technical scheme three:
Calculate by mass percentage, the content of mentioned component is: C:0.064, Mn:0.28, Si:0.415, P:0.093, S:0.002, Als:0.104, Nb:0.029, Ti:0.0025.
In order to realize the goal of the invention identical with technique scheme, the present invention also provides the production method of above-described high strength magnetic conduction steel plate, and its technical scheme is:
Adopt the chemical ingredients of carbon steel, by the interpolation of phosphorus and niobium, through smelting into qualified molten steel, continuous casting and rolling becomes coils of hot-rolled steel then, and pickling afterwards, cold rolling, annealing, smooth become qualified finished product coil of strip; Perhaps pass through finishing again, become qualified finished product coil of strip.
The concrete technical scheme of described production method is:
Molten steel reaches above chemical ingredients, passes through continuous casting and rolling then, slab thickness 40～110mm, and soaking temperature is 1110～1180 ℃, 800～900 ℃ of hot rolling finishing temperatures, coiling temperature is 550～750 ℃ after the hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0～6.0mm.
Coils of hot-rolled steel carries out pickling, cold rolling then, pickling and cold rollingly meet general cold-rolled products requirement;
Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: 550～690 ℃ of annealing temperatures, soaking time 0.5～6 hour;
Carry out smoothly afterwards, smooth unit elongation is 0.5～2.5%;
If desired, also carry out finished machined, finished machined is to the size that requires.
Optimal technical scheme: coiling temperature is more than 650 ℃ after the hot rolling.
The present invention adopts technique scheme, formulates by smelting chemical Composition Control, appropriate process, obtained to have higher mechanical property and possess good dc magnetic can cold rolled annealed steel plate.This cold-rolled steel sheet possesses high-yield strength and magnetic property, can stand big load in the use and does not deform.In the mechanical property of the steel plate of producing according to mentioned component and method, yield strength reaches 350N/mm
2More than, tensile strength reaches 380N/mm
2More than, magnetic induction density is B
100Greater than 1.83T, B
150Greater than 1.91T.
Embodiment
Below by the description to embodiment, the specific embodiment of the present invention is described in further detail, to help those skilled in the art inventive concept of the present invention, technical scheme is had more complete, accurate and deep understanding.
The invention provides a kind of high strength magnetic conduction steel plate, relate to and require to have good dc magnetic energy and intensity steel band and production method thereof, this product is used for the occasion that magnetic field is set up, and stands bigger load in the use.
The objective of the invention is to develop and have higher mechanical property and cold rolled annealed steel plate that possess high dc magnetic energy.The production of this steel plate is formulated by smelting chemical Composition Control, appropriate process, obtains high magnetic property and mechanical property.Steel plate production is to produce by steel-making, continuous casting and rolling (thin slab), pickling, flow process and related process cold rolling, cyclic annealing.
Technical scheme of the present invention:
The present invention adopts the chemical ingredients of carbon steel, and by the interpolation of phosphorus and niobium, through smelting into qualified molten steel, continuous casting and rolling becomes coils of hot-rolled steel then, pickling afterwards, cold rolling, annealing, smooth, (finishing) be qualified finished product coil of strip.
Requiring the chemical ingredients scope of steel is (wt%): C≤0.09,0.09≤Mn＜0.40, Si≤0.45,0.05≤P≤0.15, S≤0.012,0.02≤Als≤0.15,0.01≤Nb≤0.04, Ti≤0.005%, unavoidable impurities, all the other are iron.
Molten steel reaches as above chemical ingredients, pass through continuous casting and rolling then, slab thickness 40～110mm, 1110～1180 ℃ of soaking temperatures, 800～900 ℃ of hot rolling finishing temperatures, coiling temperature is 550～750 ℃ after the hot rolling, and is preferred more than 650 ℃, the 2.0～6.0mm that do not coexist that coils of hot-rolled steel thickness requires according to finished product.
Coils of hot-rolled steel carries out pickling, cold rolling then.Pickling and cold rollingly meet general cold-rolled products requirement.
Coil of strip after cold rolling carries out periodicity annealing.Annealing process is: 550～690 ℃ of annealing temperatures, soaking time 0.5～6 hour.
Carry out afterwards smooth, smooth unit elongation 0.5～2.5%.
If desired, can carry out finished machined.Finished machined is to the size that requires.
Implementation result:
Adopt the chemical ingredients of table 1, it is coils of hot-rolled steel that molten steel carries out continuous casting and rolling, pickling then, cold rolling, and the cold-rolled steel sheet annealing temperature sees Table 2, and the mechanical performance index that obtains cold-rolled steel sheet sees 2, obtains the magnetic property 3 of cold-rolled steel sheet.This cold-rolled steel sheet possesses high-yield strength and magnetic property, can stand big load in the use and does not deform.
The chemical ingredients of smelting molten steel sees Table 1.
Table 1: molten steel chemical ingredients (wt%)
| Sequence number | C | Si | Mn | P | S | Al | Nb | Ti | Fe |
| 1 | 0.045 | 0.123 | 0.26 | 0.118 | 0.006 | 0.05 | 0.027 | 0.0021 | Surplus |
| 2 | 0.019 | 0.083 | 0.20 | 0.136 | 0.004 | 0.027 | 0.024 | 0.0018 | Surplus |
| 3 | 0.064 | 0.415 | 0.28 | 0.093 | 0.002 | 0.104 | 0.029 | 0.0025 | Surplus |
The sequence number of the table 2 of table 1 and back, table 3 in correspondence with each other.
According to yield strength 350N/mm in the steel plate mechanical property of as above method production
2More than, tensile strength 380N/mm
2More than, magnetic induction density is B
100Greater than 1.83T, B
150Greater than 1.91T.
Continuous casting of molten steel is thickness 90mm continuously cast bloom, and continuously cast bloom directly enters 1150 ℃ of soaking pits, hot rolling after the soaking, and 860 ℃ of hot rolling finishing temperatures cool off after the hot rolling, batch 680 ℃ of coiling temperatures.
Coils of hot-rolled steel through overpickling, be cold rolled to specific thickness.
Coil of strip after the cold rolling bell furnace of packing into carries out cyclic annealing, and annealing process sees Table 2.
Table 2: cyclic annealing technique
Coil of strip after the annealing is smooth through levelling machine.Smooth unit elongation sees Table 3.
Through the mechanical property of above operation and technological test steel see Table 2, magnetic property sees Table 3.
Table 3: the magnetic property of coil of strip
| Sequence number | Magnetic induction density B 100（T） | Magnetic induction density B 150（T） |
| 1-1 | 1.840 | 1.919 |
| 1-2 | 1.830 | 1.910 |
| 2-1 | 1.856 | 1.935 |
| 2-2 | 1.870 | 1.949 |
| 2-3 | 1.850 | 1.929 |
| 3-1 | 1.857 | 1.938 |
| 3-2 | 1.883 | 1.958 |
| 3-3 | 1.876 | 1.951 |
Explanation to above-mentioned each table:
1, the element of the explanation of the chemical ingredients in the table 1 interpolation does not reach 0.5% of low alloy steel, in order to increase the strengthening effect of alloying element, has added phosphorus and niobium, though silicone content interpolation amount is not high.
2, table 2 is that the chemical ingredients institute production Heat Treatment Of Steel annealing temperature of steel in the table 1 is to the influence of mechanical property.The chemical ingredients of sequence number 1 is at 600 ℃ of annealing, yield strength＞350N/mm
2, at 650 ℃ of annealing, yield strength＞300N/mm
2The chemical ingredients of sequence number 2 is at 550 ℃ of annealing, yield strength＞400N/mm
2, at 600～650 ℃ of annealing, yield strength＞350N/mm
2The chemical ingredients of sequence number 3 is at 550 ℃ of annealing, yield strength＞350N/mm
2, at 600～650 ℃ of annealing, yield strength＞300N/mm
2
3, table 3 shows, the direct current magnetic induction density B under table 1 chemical ingredients and table 2 heat-treatment of annealing processing condition
100〉=1.83T and B
150〉=1.91T.
More than the present invention has been carried out exemplary description; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (7)
1. high strength magnetic conduction steel plate, main component is Fe, also comprise C, Mn, Si, P, S, Als, Nb, Ti, it is characterized in that: calculate by mass percentage, the content of mentioned component is: C≤0.09,0.09≤Mn＜0.40, Si≤0.45,0.05≤P≤0.15, S≤0.012,0.02≤Als≤0.15,0.01≤Nb≤0.04, Ti≤0.005, and unavoidable impurities.
2. according to the described high strength magnetic conduction of claim 1 steel plate, it is characterized in that: calculate by mass percentage, the content of mentioned component is: C:0.045, Mn:0.26, Si:0.123, P:0.118, S:0.006, Als:0.05, Nb:0.027, Ti:0.0021.
3. according to the described high strength magnetic conduction of claim 1 steel plate, it is characterized in that: calculate by mass percentage, the content of mentioned component is: C:0.019, Mn:0.20, Si:0.083, P:0.136, S:0.004, Als:0.027, Nb:0.024, Ti:0.0018.
4. according to the described high strength magnetic conduction of claim 1 steel plate, it is characterized in that: calculate by mass percentage, the content of mentioned component is: C:0.064, Mn:0.28, Si:0.415, P:0.093, S:0.002, Als:0.104, Nb:0.029, Ti:0.0025.
5. according to the production method of the described high strength magnetic conduction of claim 1 steel plate, it is characterized in that: the chemical ingredients that adopts carbon steel, interpolation by phosphorus and niobium, through smelting into qualified molten steel, continuous casting and rolling becomes coils of hot-rolled steel then, pickling afterwards, cold rolling, annealing, smooth become qualified finished product coil of strip; Perhaps pass through finishing again, become qualified finished product coil of strip.
6. according to the production method of the described high strength magnetic conduction of claim 5 steel plate, it is characterized in that:
Molten steel reaches above chemical ingredients, passes through continuous casting and rolling then, slab thickness 40～110mm, and soaking temperature is 1110～1180 ℃, 800～900 ℃ of hot rolling finishing temperatures, coiling temperature is 550～750 ℃ after the hot rolling; According to the difference that finished product requires, coils of hot-rolled steel thickness is at 2.0～6.0mm.
Coils of hot-rolled steel carries out pickling, cold rolling then, pickling and cold rollingly meet general cold-rolled products requirement;
Coil of strip after cold rolling carries out periodicity annealing, and its annealing process is: 550～690 ℃ of annealing temperatures, soaking time 0.5～6 hour;
Carry out smoothly afterwards, smooth unit elongation is 0.5～2.5%;
If desired, also carry out finished machined, finished machined is to the size that requires.
7. according to the production method of the described high strength magnetic conduction of claim 6 steel plate, it is characterized in that: coiling temperature is more than 650 ℃ after the hot rolling.
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| CN109234620A (en) * | 2018-09-18 | 2019-01-18 | 武汉钢铁有限公司 | High magnetic flux density magnetic levitation track F fashioned iron and its production method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904114A (en) * | 2006-07-31 | 2007-01-31 | 武汉钢铁(集团)公司 | Production method of 350 MPa grade cold rolled magnetic pole steel |
| CN1904115A (en) * | 2006-07-31 | 2007-01-31 | 武汉钢铁(集团)公司 | Production method of 450MPa grade cold rolled magnetic pole steel |
| CN102994873A (en) * | 2012-09-21 | 2013-03-27 | 马钢(集团)控股有限公司 | Production method of yield strength 250MPa-grade cold-rolled magnetic pole steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904114A (en) * | 2006-07-31 | 2007-01-31 | 武汉钢铁(集团)公司 | Production method of 350 MPa grade cold rolled magnetic pole steel |
| CN1904115A (en) * | 2006-07-31 | 2007-01-31 | 武汉钢铁(集团)公司 | Production method of 450MPa grade cold rolled magnetic pole steel |
| CN102994873A (en) * | 2012-09-21 | 2013-03-27 | 马钢(集团)控股有限公司 | Production method of yield strength 250MPa-grade cold-rolled magnetic pole steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234620A (en) * | 2018-09-18 | 2019-01-18 | 武汉钢铁有限公司 | High magnetic flux density magnetic levitation track F fashioned iron and its production method |
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