CN103993231A - Seawater-resistant magnetic steel and production method thereof - Google Patents
Seawater-resistant magnetic steel and production method thereof Download PDFInfo
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- CN103993231A CN103993231A CN201410247590.8A CN201410247590A CN103993231A CN 103993231 A CN103993231 A CN 103993231A CN 201410247590 A CN201410247590 A CN 201410247590A CN 103993231 A CN103993231 A CN 103993231A
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Abstract
The invention relates to seawater-resistant magnetic steel and a production method thereof. The seawater-resistant magnetic steel comprises the following components by weight percent: 0.020-0.065% of C, 0.08-0.50% of Si, 0.20-1.10% of Mn, 0.007-0.15% of P, 0.002-0.007% of S, 0.025-0.11% of Al, 0.008-0.45% of Cr, 0.001-0.030% of Nb and the balance of Fe and inevitable impurities. The production method comprises the following steps: steelmaking, hot rolling, cold rolling, and annealing to obtain cold rolled magnetic steel. The cold rolled magnetic steel with excellent seawater corrosion resistance, good magnetic property and high mechanical property can be obtained by adjusting chemical components of the steel by virtue of the processes such as steelmaking, hot rolling, cold rolling and annealing.
Description
Technical field
The present invention relates to a kind of magnetic pole steel and production method thereof of seawater corrosion resistance, be specifically related to a kind of under corrosive environment, have good DC magnetic performance, intensity and solidity to corrosion steel band and production method thereof.
Background technology
Present stage is only required the dual property of magnetic induction density and intensity index for magnetically permeable material, do not consider to use under corrosion working conditions.As time goes by, because infection causes plunderring of material property or reduced thickness, by the adverse consequences causing.Therefore,, along with the variation of envrionment conditions, it is more and more important that solidity to corrosion becomes.Especially clean energy water power---tidal power generation, is the equipment of generator operation at sea, and because stormy waves is large, seawater splash, causes generating set to be often subject to the corrosion of seawater.
In document, substantially only mention and there is high magnetic induction density and the magnetically permeable material of intensity index, in document, substantially there is no the corrosion resistance nature of product under corrosive environment, let alone sea-water corrosion.Do not consider the impact of environmental corrosion and require it to improve corrosion resisting property.In document, only consider mechanical property and magnetic property, do not consider the corrodibility of environment.Research and the patent of structural steel seawater corrosion resistance exist.
Adopting interpolation alloying element is to improve steel sea water corrosion resistant main method, has applied for many years industrial.But if obtain when sea water corrosion resistant, magnetic property and mechanical property will obtain and ensure that present stage document is rare simultaneously.
Summary of the invention
The magnetic pole steel and the production method thereof that the object of the present invention is to provide a kind of seawater corrosion resistance, have good sea water corrosion resistant, magnetic property and mechanical property.Be mainly to adopt suitable alloying and suitable thermal treatment after cold rolling, ensure above performance.
Concrete technical scheme is as follows:
A kind of magnetic pole steel of seawater corrosion resistance, the C that contains following component: 0.020-0.065 according to weight percent, the Si of 0.08-0.50, the Mn of 0.20-1.10, the P of 0.007-0.15, the S of 0.002-0.007, the Al of 0.025-0.11, the Cr of 0.008-0.45, the Nb of 0.001-0.030, surplus is Fe and inevitable impurity.
Further, contain following component according to weight percent: 0.020 C, 0.083 Si, 0.20 Mn, 0.136 P, 0.0044 S, 0.027 Al, 0.016 Cr, 0.024 Nb.
Further, contain following component according to weight percent: 0.064 C, 0.415 Si, 0.28 Mn, 0.093 P, 0.002 S, 0.104 Al, 0.43 Cr, 0.029 Nb.
Further, yield strength is 325-392N/mm
2, the corrosion speed in seawater is annual 293.3 microns-327.9 microns.
The production method of the magnetic pole steel of above-mentioned seawater corrosion resistance, comprises the steps:
(1) steel-making;
(2) hot rolling;
(3) cold rolling;
(4) annealing;
(5) obtain cold rolled magnetic pole steel.
Further, the middle annealing temperature of step (4) respectively: 600 DEG C, 650 DEG C.
Further, in step (4), soaking time is 2 hours.
Compared with currently available technology, the present invention, by the chemical composition adjustment to steel, through steel-making, hot rolling, cold rolling, annealing process, obtains the cold rolled magnetic pole steel that sea water corrosion resistant is good, magnetic property good and mechanical property is high.The magnetic pole steel of producing through the present invention, cost is low, and the product of acquisition is taken into account resistance to corrosion seawater, magnetic and mechanical property good combination property.If application, the income that not only company can obtain, the consumer products life-span improves simultaneously.
Brief description of the drawings
Fig. 1 be different tests steel in cold rolling rear 600 DEG C of annealing the corrosion speed in seawater
Cold rolling rear 600 DEG C of annealing temperatures, the sea water corrosion resistant difference of different-alloy steel.Resistance to corrosion seawater order: numbering 5 > 2 > 4 > 3 > 1.
Fig. 2 be different tests steel in cold rolling rear 650 DEG C of annealing the corrosion speed in seawater
Cold rolling rear 650 DEG C of annealing temperatures, the sea water corrosion resistant difference of different-alloy steel.Resistance to corrosion seawater order: numbering 5 > 4 > 3 > 2 > 1.
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in numerous embodiments of the present invention.
The chemical composition of test steel is in table 1.
The chemical composition (wt%) of table 1. different tests steel
The cold rolling post growth annealing of test steel:
1) annealing temperature respectively: 600 DEG C, 650 DEG C
2) soaking time is 2 hours.
Example 1.
By being numbered 5 chemical composition in steel-making table 1, hot rolling, cold rolling be the cold-rolled steel sheet of 1.0mm, then 600 DEG C of annealing temperatures, insulation 2 hours.Corrosion speed in seawater is annual 293.3 microns, is annual 386 microns significantly reduces with the corrosion speed that is numbered 1 in comparative example table 1, and magnetic induction density and yield strength all improve simultaneously.In table 3 and table 4.
Example 2.
By being numbered 5 chemical composition in steel-making table 1, hot rolling, cold rolling be the cold-rolled steel sheet of 1.0mm, then 650 DEG C of annealing temperatures, insulation 2 hours.Corrosion speed in seawater is annual 327.9 microns, is annual 491.3 microns significantly reduces with the corrosion speed that is numbered 1 in comparative example table 1, and magnetic induction density and yield strength all improve simultaneously.In table 3 and table 4.
Example 3.
By being numbered 4 chemical composition in steel-making table 1, hot rolling, cold rolling be the cold-rolled steel sheet of 1.0mm, then 600 DEG C of annealing temperatures, insulation 2 hours.Corrosion speed in seawater is annual 324.6 microns. corrosion speed is low, very high but magnetic induction density is 1958mT.Contain Cr, P and Nb, obtained sea water corrosion resistant good, magnetic induction density and mechanical property are high.
In table 2,3 and table 4.
Table 2 sea water corrosion test (accelerated test) result (unit: micron/year)
| Cold rolled annealed temperature (DEG C) | 1 | 2 | 3 | 4 | 5 |
| 600 | 386.0 | 315.4 | 388.5 | 324.6 | 293.3 |
| 650 | 491.3 | 357.8 | 338.1 | 333.1 | 327.9 |
Table 3 magnetic property (B
150) test-results (unit: mT)
| Cold rolled annealed temperature (DEG C) | 1 | 2 | 3 | 4 | 5 |
| 600 | 1940 | 1923 | 1919 | 1958 | 1949 |
| 650 | 1923 | 1910 | 1910 | 1951 | 1929 |
Test-results (the R of table 4 yield strength
p0.2, unit: N/mm
2)
| Cold rolled annealed temperature (DEG C) | 1 | 2 | 3 | 4 | 5 |
| 600 | 356 | 392 | 356 | 325 | 369 |
| 650 | 340 | 381 | 340 | 326 | 351 |
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (7)
1. the magnetic pole steel of a seawater corrosion resistance, it is characterized in that, contain following component according to weight percent:: the C of 0.020-0.065, the Si of 0.08-0.50, the Mn of 0.20-1.10, the P of 0.007-0.15, the S of 0.002-0.007, the Al of 0.025-0.11, the Cr of 0.008-0.45, the Nb of 0.001-0.030, surplus is Fe and inevitable impurity.
2. the magnetic pole steel of seawater corrosion resistance as claimed in claim 1, is characterized in that, contains following component according to weight percent: 0.020 C, 0.083 Si, 0.20 Mn, 0.136 P, 0.0044 S, 0.027 Al, 0.016 Cr, 0.024 Nb.
3. the magnetic pole steel of seawater corrosion resistance as claimed in claim 1, is characterized in that, contains following component according to weight percent: 0.064 C, 0.415 Si, 0.28 Mn, 0.093 P, 0.002 S, 0.104 Al, 0.43 Cr, 0.029 Nb.
4. the magnetic pole steel of the seawater corrosion resistance as described in claim 1-3, is characterized in that, yield strength is 325-392N/mm
2, the corrosion speed in seawater is annual 293.3 microns-327.9 microns.
5. the production method of the magnetic pole steel of seawater corrosion resistance as described in claim 1-4, is characterized in that, comprises the steps:
(1) steel-making;
(2) hot rolling;
(3) cold rolling;
(4) annealing;
(5) obtain cold rolled magnetic pole steel.
6. the production method of the magnetic pole steel of seawater corrosion resistance as claimed in claim 5, is characterized in that, in step (4), annealing temperature respectively: 600 DEG C, 650 DEG C.
7. the production method of the magnetic pole steel of seawater corrosion resistance as described in claim 5 or 6, is characterized in that, in step (4), soaking time is 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247590.8A CN103993231A (en) | 2014-06-05 | 2014-06-05 | Seawater-resistant magnetic steel and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247590.8A CN103993231A (en) | 2014-06-05 | 2014-06-05 | Seawater-resistant magnetic steel and production method thereof |
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|---|---|
| CN103993231A true CN103993231A (en) | 2014-08-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU985132A1 (en) * | 1980-01-10 | 1982-12-30 | Предприятие П/Я Р-6209 | Corrosion resistant steel |
| JPH0344448A (en) * | 1989-07-11 | 1991-02-26 | Daido Steel Co Ltd | Stainless steel excellent in corrosion resistance |
| 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 |
| CN102839266A (en) * | 2012-09-21 | 2012-12-26 | 马钢(集团)控股有限公司 | Production method for cold-rolled pole steel with yield strength being 250MPa |
| CN103290326A (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 |
-
2014
- 2014-06-05 CN CN201410247590.8A patent/CN103993231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU985132A1 (en) * | 1980-01-10 | 1982-12-30 | Предприятие П/Я Р-6209 | Corrosion resistant steel |
| JPH0344448A (en) * | 1989-07-11 | 1991-02-26 | Daido Steel Co Ltd | Stainless steel excellent in corrosion resistance |
| 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 |
| CN102839266A (en) * | 2012-09-21 | 2012-12-26 | 马钢(集团)控股有限公司 | Production method for cold-rolled pole steel with yield strength being 250MPa |
| CN103290326A (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 |
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Application publication date: 20140820 |