CN102839266A - Production method for cold-rolled pole steel with yield strength being 250MPa - Google Patents
Production method for cold-rolled pole steel with yield strength being 250MPa Download PDFInfo
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- CN102839266A CN102839266A CN2012103588020A CN201210358802A CN102839266A CN 102839266 A CN102839266 A CN 102839266A CN 2012103588020 A CN2012103588020 A CN 2012103588020A CN 201210358802 A CN201210358802 A CN 201210358802A CN 102839266 A CN102839266 A CN 102839266A
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Abstract
The invention provides a production method for cold-rolled pole steel with yield strength being 250MPa. The production method for the cold-rolled pole steel comprises the following steps: firstly, forming an ingot blank after continuously casting and continuously rolling molten steel, forming a steel coil after heating and hotly rolling the ingot blank, and coiling the steel coil, wherein the chemical component of the steel coil comprises carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulfur (S), acid molten aluminum (Als), niobium (Nb), titanium (Ti) and iron; 2) forming the steel coil after heating and hotly rolling, and then performing scouring treatment and cold rolling treatment in turn; and after performing the scouring treatment and the cold rolling treatment on the steel coil, performing annealing treatment and leveling treatment in turn. According to the production method for the cold-rolled pole steel provided by the invention, the chemical component of the carbon steel is adopted and the continuous casting, heating, hotly rolling, scouring, cold rolling and cold-rolled plate low-temperature annealing treatment are performed, so that the cold-rolled pole steel with higher strength and high magnetic induction intensity is obtained.
Description
Technical field
The invention belongs to steel plate process for processing technical field, more particularly, relate to the working method that a kind of ys is the 250MPa grade cold rolled magnetic pole steel.
Background technology
Improving the intensity of steel plate materials, generally is to add alloy element or undergo phase transition through thermal treatment to obtain HS mutually or cause high density dislocation or intergranular precipitation takes place and strengthen.Though add alloy element is the effective ways that improve the strength of materials, and most of alloy elements are to reduce magnetic property, and thermal treatment undergoes phase transition and obtains the HS phase 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 through alloying.Though the method for English Patent GB1351884 has obtained the HS index, magnetic induction density obviously reduces.The method of Chinese patent CN200610019771.0, CN200610019772.5 and CN200610019773.X; Be intensity, the high magnetic induction density of maintenance in order to improve magnetically permeable material; Be to increase manganese and niobium,, control suitable hot rolling and cold rolled annealed Technology through the different additions of manganese and niobium through alloying; Obtain high mechanical property (intensity index), what magnetic induction density reduced simultaneously lacks as far as possible.This technological method owing to need carry out second-heating, need add two kinds of compositions of manganese and niobium simultaneously steel plate, have increased production difficulty and production cost.
Summary of the invention
Technical problem to be solved by this invention is: not enough to prior art, provide a kind of have higher mechanical property and possess higher dc magnetic can ys be 250MPa grade cold rolled magnetic pole steel working method.
Solve above-described technical problem, the technical scheme that the present invention takes is:
The present invention is the working method of 250MPa grade cold rolled magnetic pole steel for a kind of ys; The step of described working method is: when 1) described cold rolled magnetic pole steel is produced; Earlier after continuous casting and rolling, form strand by molten steel; Strand forms coil of strip after the heating hot rolling is handled; Coil of strip to after handling through the heating hot rolling batches, and the chemical ingredients of described coil of strip comprises carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulphur (S), the molten aluminium (Als) of acid, niobium (Nb), titanium (Ti) and iron; 2) coil of strip that after heating, hot rolling are handled, forms carries out cleanup acid treatment and cold-rolling treatment more successively; 3) coil of strip is after cleanup acid treatment and cold-rolling treatment; Carry out anneal and smooth processing more successively; When described cold rolled magnetic pole steel is produced; Each composition proportion of coil of strip of processing cold rolled magnetic pole steel is respectively (wt%): carbon (C)＜0.06,0.09≤manganese (Mn)＜0.50, silicon (Si)＜0.10, phosphorus (P)≤0.04, the molten aluminium (Als)≤0.05 of sulphur (S)≤0.015,0.015≤acid, niobium (Nb)≤0.008, titanium (Ti)≤0.005, surplus is iron (Fe).
The thickness of the described strand that after continuous casting and rolling, forms is 180-250mm; When the strand of described production cold rolled magnetic pole steel heats the hot rolling processing; Temperature during the heating hot rolling is controlled between 1180-2600 ℃, and the coiling temperature when coil of strip batches is controlled between 550-770 ℃.
When the coil of strip of described processing magnetic conduction steel plate carried out anneal, the heating and temperature control during annealing was between 530-610 ℃, and be controlled between 1-7 hours the heat-up time during annealing.
When described coil of strip carried out anneal, connecting the speed move back Wiring technology was PM 50-400m, and when the coil of strip after the annealing carried out smooth processing, the elongation control of the levelling machine of coil of strip was 0.5-2.5%.
The preferred specific gravity of each composition of molten steel of described processing strand is respectively (wt%): 0.01＜carbon (C)≤0.04,0.15≤manganese (Mn)＜0.30, silicon (Si)≤0.07, phosphorus (P)≤0.02, the molten aluminium (Als)≤0.05 of sulphur (S)≤0.010,0.03≤acid, niobium (Nb)≤0.006, titanium (Ti)≤0.002, surplus is iron (Fe).
Adopt technical scheme of the present invention, can obtain following beneficial effect:
Ys of the present invention is the working method of 250MPa grade cold rolled magnetic pole steel; Adopt the chemical ingredients of carbon steel; Through continuous casting, heating, hot rolling, pickling, cold rolling, the cold-reduced sheet low-temperature annealing is handled, and obtains to have the cold rolled magnetic pole steel of higher-strength and high magnetic flux density.This cold rolled magnetic pole steel possesses high magnetic property, can stand bigger load in the use and does not deform.According to the cold rolled magnetic pole steel of working method production of the present invention, in its mechanical property, ys 250N/mm
2More than, tensile strength 330N/mm
2More than, magnetic induction density B
50Greater than 1.64T, B
100Greater than 1.79T, B
150Greater than 1.90T, thereby make cold rolled magnetic pole steel of the present invention have higher quality.
Description of drawings
The mark of facing down among expressed content of each accompanying drawing of this specification sheets and the figure is made briefly bright:
Fig. 1 is the composition synoptic diagram of the coil of strip of processing cold rolled magnetic pole steel of the present invention;
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify:
Shown in accompanying drawing 1; The present invention is the working method of 250MPa grade cold rolled magnetic pole steel for a kind of ys; The step of described working method is: when 1) described cold rolled magnetic pole steel is produced; Earlier after continuous casting and rolling, form strand by molten steel; Strand forms coil of strip after the heating hot rolling is handled, the coil of strip after handling through the heating hot rolling is batched, and the chemical ingredients of described coil of strip comprises carbon (C), manganese (Mn), silicon (Si), phosphorus (P), sulphur (S), the molten aluminium (Als) of acid, niobium (Nb), titanium (Ti) and iron; 2) coil of strip that after heating, hot rolling are handled, forms carries out cleanup acid treatment and cold-rolling treatment more successively; 3) coil of strip is after cleanup acid treatment and cold-rolling treatment; Carry out anneal and smooth processing more successively; When described cold rolled magnetic pole steel is produced; Each composition proportion of coil of strip of processing cold rolled magnetic pole steel is respectively (wt%): carbon (C)＜0.06,0.09≤manganese (Mn)＜0.50, silicon (Si)＜0.10, phosphorus (P)≤0.04, the molten aluminium (Als)≤0.05 of sulphur (S)≤0.015,0.015≤acid, niobium (Nb)≤0.008, titanium (Ti)≤0.005, surplus is iron (Fe).
The thickness of the described strand that after continuous casting and rolling, forms is 180-250mm; When the strand of described production cold rolled magnetic pole steel heats the hot rolling processing; Temperature during the heating hot rolling is controlled between 1180-2600 ℃, and the coiling temperature when coil of strip batches is controlled between 550-770 ℃.
When the coil of strip of described processing magnetic conduction steel plate carried out anneal, the heating and temperature control during annealing was between 530-610 ℃, and be controlled between 1-7 hours the heat-up time during annealing.
When described coil of strip carried out anneal, connecting the speed move back Wiring technology was PM 50-400m, and when the coil of strip after the annealing carried out smooth processing, the elongation control of the levelling machine of coil of strip was 0.5-2.5%.
The preferred specific gravity of each composition of molten steel of described processing strand is respectively (wt%): 0.01＜carbon (C)≤0.04,0.15≤manganese (Mn)＜0.30, silicon (Si)≤0.07, phosphorus (P)≤0.02, the molten aluminium (Als)≤0.05 of sulphur (S)≤0.010,0.03≤acid, niobium (Nb)≤0.006, titanium (Ti)≤0.002, surplus is iron (Fe).
Ys of the present invention is the working method of 250MPa grade cold rolled magnetic pole steel; Adopt the chemical ingredients of carbon steel; Through continuous casting, heating, hot rolling, pickling, cold rolling, the cold-reduced sheet low-temperature annealing is handled, and obtains to have the cold rolled magnetic pole steel of higher-strength and high magnetic flux density.This cold rolled magnetic pole steel possesses high magnetic property, can stand bigger load in the use and does not deform.According to the cold rolled magnetic pole steel of working method production of the present invention, in its mechanical property, ys 250N/mm
2More than, tensile strength 330N/mm
2More than, magnetic induction density B
50Greater than 1.64T, B
100Greater than 1.79T, B
150Greater than 1.90T, thereby make cold rolled magnetic pole steel of the present invention have higher quality.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or design of the present invention and technical scheme are directly applied to other occasions without improving, all in protection scope of the present invention.
Claims (5)
1. working method that ys is the 250MPa grade cold rolled magnetic pole steel; The step of described working method is: when 1) described cold rolled magnetic pole steel is produced; Earlier after continuous casting and rolling, form strand by molten steel; Strand forms coil of strip after the heating hot rolling is handled, the coil of strip after handling through the heating hot rolling is batched, and the chemical ingredients of described coil of strip comprises C, Mn, Si, P, S, Als, Nb, Ti and iron; 2) coil of strip that after heating, hot rolling are handled, forms carries out cleanup acid treatment and cold-rolling treatment more successively; 3) coil of strip is after cleanup acid treatment and cold-rolling treatment; Carry out anneal and smooth processing more successively; It is characterized in that: when described cold rolled magnetic pole steel is produced; Each composition proportion of coil of strip of processing cold rolled magnetic pole steel is respectively (wt%): C＜0.06,0.09≤Mn＜0.50, Si＜0.10, P≤0.04, S≤0.015,0.015≤Als≤0.05, Nb≤0.008, Ti≤0.005, and surplus is Fe.
2. ys according to claim 1 is the working method of 250MPa grade cold rolled magnetic pole steel; It is characterized in that: the thickness of the described strand that after continuous casting and rolling, forms is 180-250mm; When the strand of described production cold rolled magnetic pole steel heats the hot rolling processing; Temperature during the heating hot rolling is controlled between 1180-2600 ℃, and the coiling temperature when coil of strip batches is controlled between 550-770 ℃.
3. ys according to claim 1 and 2 is the working method of 250MPa grade cold rolled magnetic pole steel; It is characterized in that: when the coil of strip of described processing magnetic conduction steel plate carries out anneal; Heating and temperature control during annealing is between 530-610 ℃, and be controlled between 1-7 hours the heat-up time during annealing.
4. ys according to claim 3 is the working method of 250MPa grade cold rolled magnetic pole steel; It is characterized in that: when described coil of strip carries out anneal; Connecting the speed of moving back Wiring technology is PM 50-400m; When coil of strip carried out smooth processing, the elongation control of the levelling machine of coil of strip was 0.5-2.5%.
5. ys according to claim 4 is the working method of 250MPa grade cold rolled magnetic pole steel; It is characterized in that: the preferred specific gravity of each composition of molten steel of described processing strand is respectively (wt%): 0.01＜C≤0.04,0.15≤Mn＜0.30, Si≤0.07, P≤0.02, S≤0.010,0.03≤Als≤0.05, Nb≤0.006, Ti≤0.002, and surplus is Fe.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290315A (en) * | 2013-06-07 | 2013-09-11 | 马钢(集团)控股有限公司 | High-strength magnetoconductive steel plate and production method thereof |
| CN103352166A (en) * | 2013-06-07 | 2013-10-16 | 马钢(集团)控股有限公司 | High-strength magnetic-conductive steel plate and producing method thereof |
| CN103993231A (en) * | 2014-06-05 | 2014-08-20 | 马钢(集团)控股有限公司 | Seawater-resistant magnetic steel and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009149993A (en) * | 1999-07-05 | 2009-07-09 | Thyssenkrupp Stahl Ag | Method for producing non-oriented electrical steel sheet |
| CN102650016A (en) * | 2012-05-24 | 2012-08-29 | 宝山钢铁股份有限公司 | Manufacturing method for high-magnetic induction low-cost 250 MPa cold-rolled magnetic pole steel |
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- 2012-09-21 CN CN201210358802.0A patent/CN102839266B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009149993A (en) * | 1999-07-05 | 2009-07-09 | Thyssenkrupp Stahl Ag | Method for producing non-oriented electrical steel sheet |
| CN102650016A (en) * | 2012-05-24 | 2012-08-29 | 宝山钢铁股份有限公司 | Manufacturing method for high-magnetic induction low-cost 250 MPa cold-rolled magnetic pole steel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290315A (en) * | 2013-06-07 | 2013-09-11 | 马钢(集团)控股有限公司 | High-strength magnetoconductive steel plate and production method thereof |
| CN103352166A (en) * | 2013-06-07 | 2013-10-16 | 马钢(集团)控股有限公司 | High-strength magnetic-conductive steel plate and producing method thereof |
| CN103290315B (en) * | 2013-06-07 | 2015-09-09 | 马钢(集团)控股有限公司 | A kind of High-strength magnetoconductive steel plate and production method thereof |
| CN103352166B (en) * | 2013-06-07 | 2015-11-18 | 马钢(集团)控股有限公司 | A kind of High-strength magnetoconductive steel plate and production method thereof |
| CN103993231A (en) * | 2014-06-05 | 2014-08-20 | 马钢(集团)控股有限公司 | Seawater-resistant magnetic steel and production method thereof |
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