CN1410580A - Cold rolling electromagnetic pure iron plate having very low coercive force and production method thereof - Google Patents
Cold rolling electromagnetic pure iron plate having very low coercive force and production method thereof Download PDFInfo
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- CN1410580A CN1410580A CN 01126936 CN01126936A CN1410580A CN 1410580 A CN1410580 A CN 1410580A CN 01126936 CN01126936 CN 01126936 CN 01126936 A CN01126936 A CN 01126936A CN 1410580 A CN1410580 A CN 1410580A
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Abstract
The weight percentage of Components of the plate strip is as following: C< or =0.010%, Si:0.10-0.03%, Mn 0.1%-0.5%, Al < or = 0.005%, P < or = 0.05% etc. iron as the rest. The manufacturing method is as follows. According to the standard, the continuous casting billet is hot-rolled; heating at 1000-1250 deg.C, finishing to gage at 750 deg.C-900 deg.C. The deflection of cold rolling is controlled more than 60%. The finished product of rolled plate is made through 600-800 deg.C. The finished plate through magnetic annealing at non-oxidizing atmosphere for 2 hr, at 800 deg.C-900 deg.C produces the strip of iron plate with very low coercive force. The invented strip provides the features of low cost and good punching property.
Description
Technical field
The present invention relates to a kind of cold rolling electromagnetic pure iron strip, relate in particular to a kind of cold rolling electromagnetic pure iron strip and production method thereof with utmost point low-coercivity.
Background technology
Cold rolling electromagnetic pure iron strip with utmost point low-coercivity is applied on the equipment such as electromagnetic relay, magnetic shielding and direct-current machine usually.
The manufacture method of the cold rolling electromagnetic pure iron strip of utmost point low-coercivity mainly contains the following aspects:
The higher carbon of GB6985-86 defined, contain the manufacture method of higher Al (0.15%-0.5%) and silicon (0.20%) composition, shortcoming is the cost height, needs the user to carry out carbonization treatment simultaneously when magnetic annealing, otherwise magnetic worsens, takes place magnetic aging.Because carbon content, silicone content are higher, pure iron plate hardness height, stamping-out is relatively poor, and the shearing area euphotic zone is not enough, easily causes the electromagnetic relay timeliness.
The method that the disclosed Ultra-low carbon aluminium killed steel of Te Kaiping 5-247604 is handled through smooth (critical draught).Make the grain coarsening when user's magnetic annealing of pure iron band during critical smooth purpose, reach the extremely low purpose of coercive force.The shortcoming of this method is because critical smooth amount is bigger, causes strain aging easily, and the pure iron plate back hardness of dispatching from the factory raises very soon, causes user's stamping-out difficulty.If the pure iron band is through cover annealing,, make after the finished product magnetic annealing coercive force inequality on the whole pure iron band, unstable properties because pure iron belt length direction crystal grain is inhomogeneous.
The pure iron production method of the based on very high purity that certain special steel company of Japan produces, characteristics are Ultra-low carbon (＜0.005%), ultralow aluminium (＜0.001%), very low silicon (＜0.03%), manganese (0.2%) and low-phosphorous (＜0.02%) of general content.Its shortcoming is because deoxidant element aluminium, silicon etc. are all very low, during smelting in the molten steel oxygen level very high, the increase of oxide inclusion has a negative impact to the performance of the finished product on the contrary.The oxygen level height also makes the continuous casting difficulty simultaneously, and cost raises.Obtain the lower strand of oxygen level, the smelting difficulty is quite big.
In patent 98103523.X (patent people is the applicant), the cold-rolled pure iron plate producing process that provides a kind of pure iron plate to contain higher phosphorus and silicon, finished product hardness is higher, and the shearing area euphotic zone is not enough, easily causes the device timeliness.
Summary of the invention
In view of existing situation, the object of the present invention is to provide a kind of production cost low, the stamping-out performance is good, cold rolling electromagnetic pure iron strip and production method thereof that coercive force is extremely low.
For achieving the above object, of the present invention have a cold rolling electromagnetic pure iron strip of utmost point low-coercivity:
Its composition weight percent is: C≤0.010%, and Si:0.10～0.03%, Mn:0.1%～0.5%, Al≤0.005%, P≤0.05%, S≤0.01%, N≤0.005%, O≤0.02%, all the other are iron.
Production method with the cold rolling electromagnetic pure iron strip of utmost point low-coercivity is:
With composition is C≤0.010%, Si:0.10～0.03%, and Mn:0.1%～0.5%, Al≤0.005%, P≤0.05%, S≤0.01%, N≤0.005%, O≤0.02%, all the other are iron; The continuously cast bloom of mentioned component is carried out hot rolling by following system: 1000 ℃～1250 ℃ heating and 750 ℃～900 ℃ finish to gauges, cold rolling reduction is controlled at more than 60%, cold-reduced sheet is made production board through 600 ℃～800 ℃ continuous annealings, and this production board can obtain the cold rolling electromagnetic pure iron strip of coercivity H≤40A/m through 800 ℃～900 ℃ * 2h (nonoxidizing atmosphere) magnetic annealing.
Principle of the present invention is described below:
Below the C:0.010%.C surpasses 0.010% will hinder the element of grain growth strongly, and coercive force is increased, and cause magnetic aging simultaneously.
Si：Si?0.10～0.03％。The Si amount surpasses 0.10% will make magnetic strength reduce, and less than 0.03% will make deoxidation difficulty when smelting, and the increase of oxygen level is harmful to the magnetic of the finished product.
Mn：0.1％～0.5％。Mn improves the pure iron plate condition of surface, reduces hot-short element, and it is bad to be lower than 0.1% effect, is higher than 0.5% pure iron plate hardness will be increased, and processibility is bad.
Below the Al:0.005%.Surpass 0.005% the AlN amount of separating out will be increased, the pure iron plate grain growth is insufficient during magnetic annealing, and coercive force increases, with the target call that does not reach below the 40A/m.
Below the P:0.05%.Surpass 0.05% pure iron plate hardness will be increased, processibility is bad, and the shear surface euphotic zone is not enough simultaneously, the accelerating relay timeliness.
Below the S:0.01%.Surpass 0.01% the Sization thing amount of separating out such as MnS will be increased greatly, hinder grain growth strongly, the coercive force increase.
Below the N:0.005%.Surpass 0.01% the Nization thing amount of separating out such as AlN will be increased greatly, hinder grain growth strongly, the coercive force increase.
Below the O:0.02%.Surpass 0.02% the oxide inclusion amount will be increased greatly, hinder grain growth strongly, make simultaneously to be mingled with the demagnetizing field increase that causes, coercive force raises.
More than be to reach the extremely low essential condition of coercive force to the requirement of composition.The requirement of hot rolling system mainly is in order to guarantee the hot procedure smooth implementation, the amount of separating out of MnS and AlN to be reduced as far as possible.
SRT：1000℃～1250℃。Be lower than 1000 ℃ and can't finish the hot continuous rolling process, can not guarantee finish to gauge and coiling temperature, be higher than 1250 ℃ of increases of separating out that will make in MnS and AlN solid solution and the course of hot rolling, the grain growing resistance increases.
FDT；750℃～900℃。Be lower than 750 ℃ and will make hot rolling reeling be difficult to finish, be higher than 900 ℃ hot-rolled sheet is undergone phase transition in cooling, crystal grain diminishes, and is unfavorable to the finished product magnetic.
The control of cold rolling change row amount and annealing temperature mainly makes pure iron plate that good stamping-out processibility is arranged.Deflection be lower than 60% will make the pure iron plate magnetic annealing after grain growth insufficient, coercive force increases.Softening annealing temperature is lower than 600 ℃ and be higher than 800 ℃ and all can not obtain better hardness and processibility.
Owing to contain a certain amount of silicon in the steel, can reduce the oxygen level in the steel, be beneficial to the enforcement of big production, cost is also lower.
Embodiment
Embodiment:
Press composition shown in the table 1 (surplus for Fe) and make cold rolling electromagnetic pure iron strip of the present invention, make product of the present invention through continuous casting, hot rolling, cold rolling and annealing.Hot rolling system, cold rolling system and softening annealing temperature, magnetic annealing temperature and thickness of slab are shown in Table 2, and the coiling temperature of embodiments of the invention is 700 ℃.Obtained of the present inventionly have the coercive force of the cold rolling electromagnetic pure iron strip of utmost point low-coercivity and the coercitive measuring result of reference examples sees Table 2.By the coercive force of the visible cold rolling electromagnetic pure iron strip of the present invention of table 2 all much smaller than reference examples.
The composition of table 1 embodiment and reference examples (unit weight %)
| Embodiment | ????C | ????P | ????Si | ??N | ??S | ????Mn | ????Al | ????O |
| Embodiment 1 | ????0.0019 | ????0.015 | ????0.060 | ??0.0019 | ??0.0071 | ????0.46 | ????0.001 | ??0.0180 |
| Embodiment 2 | ????0.0050 | ????0.011 | ????0.080 | ??0.0017 | ??0.0039 | ????0.25 | ????0.001 | ??0.0152 |
| Embodiment 3 | ????0.0080 | ????0.035 | ????0.040 | ??0.0030 | ??0.0020 | ????0.15 | ????0.003 | ??0.0105 |
| Reference examples 1 | ????0.0020 | ????0.073 | ????0.150 | ??0.0014 | ??0.0046 | ????0.24 | ????0.001 | ??0.0165 |
| Reference examples 2 | ????0.0018 | ????0.014 | ????0.008 | ??0.0019 | ??0.0043 | ????0.24 | ????0.001 | ??0.0218 |
Table 2 production technique and measuring result
| Embodiment | Hot rolling SRT ℃ | Hot rolling FDT ℃ | Softening annealing temperature | The magnetic annealing temperature | Cold rolling draft % | Thickness of slab mm | ???Hc ???A/m | GB69 85-86 contrasts |
| Embodiment 1 | ??1050 | ??800 | ??700 | ??800 | ??71 | ????1.0 | ???19 | ?DT4C |
| Embodiment 2 | ??1150 | ??830 | ??750 | ??850 | ??75 | ????1.0 | ???20 | ?DT4C |
| Embodiment 3 | ??1200 | ??860 | ??650 | ??870 | ??65 | ????1.0 | ???26 | ?DT4C |
| Reference examples 1 | ??1170 | ??850 | ??750 | ??850 | ??75 | ????1.0 | ???36 | ?DT4E |
| Reference examples 2 | ??1140 | ??820 | ??650 | ??870 | ??71 | ????1.0 | ???60 | ?DT4A |
Claims (2)
1. cold rolling electromagnetic pure iron strip with utmost point low-coercivity, it is characterized in that: its composition weight percent is: C≤0.010%, Si:0.10～0.03%, Mn:0.1%～0.5%, Al≤0.005%, P≤0.05%, S≤0.01%, N≤0.005%, O≤0.02%, all the other are iron.
2. production method with cold rolling electromagnetic pure iron strip of utmost point low-coercivity, it is characterized in that: C≤0.010%, Si:0.10～0.03%, Mn:0.1%～0.5%, Al≤0.005%, P≤0.05%, S≤0.01%, N≤0.005%, O≤0.02%, all the other are iron, the continuously cast bloom of mentioned component is carried out hot rolling by following system: 1000 ℃～1250 ℃ heating and 750 ℃～900 ℃ finish to gauges, cold rolling reduction is controlled at more than 60%, and cold-reduced sheet is made production board through 600 ℃～800 ℃ continuous annealings, this production board is through 800 ℃～900 ℃ * 2h, nonoxidizing atmosphere magnetic annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269367A CN1162564C (en) | 2001-09-29 | 2001-09-29 | Cold rolling electromagnetic pure iron plate having very low coercive force and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269367A CN1162564C (en) | 2001-09-29 | 2001-09-29 | Cold rolling electromagnetic pure iron plate having very low coercive force and production method thereof |
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| Publication Number | Publication Date |
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| CN1410580A true CN1410580A (en) | 2003-04-16 |
| CN1162564C CN1162564C (en) | 2004-08-18 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457385C (en) * | 2005-11-25 | 2009-02-04 | 山西太钢不锈钢股份有限公司 | Method for manufacturing electromagnetic pure iron cold-rolled sheet material with low coercive force and high magnetoconductivity |
| CN101096724B (en) * | 2006-06-28 | 2010-05-12 | 宝山钢铁股份有限公司 | Electromagnetic steel having excellent electromagnetic property and method for manufacturing same |
| CN103205548A (en) * | 2013-04-16 | 2013-07-17 | 山西太钢不锈钢股份有限公司 | Manufacturing method of low-coercive force electromagnetic pure ion cold-rolled sheet |
| CN106191410A (en) * | 2016-08-15 | 2016-12-07 | 山西太钢不锈钢股份有限公司 | A kind of method improving electromagnetic pure iron hot rolled plate pcrmeability |
| CN106555034A (en) * | 2015-09-28 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of cold rolling electromagnetic pure iron strip continuous annealing method of low-coercivity |
| CN107541591A (en) * | 2017-08-29 | 2018-01-05 | 西安汇丰精密合金制造有限公司 | A kind of manufacture method of super electromagnetic pure iron DT4C bars |
| CN107794458A (en) * | 2016-08-30 | 2018-03-13 | 宝山钢铁股份有限公司 | Exempt from magnetized electromagnetic pure iron and its manufacture method with high warping resistance characteristic |
| CN108118250A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | A kind of warping resistance cracking exempts from magnetization annealing electromagnetic pure iron and its manufacturing method |
| CN109097549A (en) * | 2018-06-30 | 2018-12-28 | 西安铁路信号有限责任公司 | A kind of electromagnetic pure iron vertical bar material cold-rolling process method |
| CN114517275A (en) * | 2020-11-20 | 2022-05-20 | 宝山钢铁股份有限公司 | Super electromagnetic pure iron cold-rolled plate strip and preparation method thereof |
-
2001
- 2001-09-29 CN CNB011269367A patent/CN1162564C/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457385C (en) * | 2005-11-25 | 2009-02-04 | 山西太钢不锈钢股份有限公司 | Method for manufacturing electromagnetic pure iron cold-rolled sheet material with low coercive force and high magnetoconductivity |
| CN101096724B (en) * | 2006-06-28 | 2010-05-12 | 宝山钢铁股份有限公司 | Electromagnetic steel having excellent electromagnetic property and method for manufacturing same |
| CN103205548A (en) * | 2013-04-16 | 2013-07-17 | 山西太钢不锈钢股份有限公司 | Manufacturing method of low-coercive force electromagnetic pure ion cold-rolled sheet |
| CN103205548B (en) * | 2013-04-16 | 2015-02-25 | 山西太钢不锈钢股份有限公司 | Manufacturing method of low-coercive force electromagnetic pure ion cold-rolled sheet |
| CN106555034B (en) * | 2015-09-28 | 2019-02-05 | 宝山钢铁股份有限公司 | A kind of low-coercivity cold rolling electromagnetic pure iron strip continuous annealing method |
| CN106555034A (en) * | 2015-09-28 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of cold rolling electromagnetic pure iron strip continuous annealing method of low-coercivity |
| WO2017054665A1 (en) * | 2015-09-28 | 2017-04-06 | 宝山钢铁股份有限公司 | Continuous annealing method for low coercive force cold-rolled electromagnetic pure iron plate and strip |
| US10697040B2 (en) | 2015-09-28 | 2020-06-30 | Baoshan Iron & Steel Co., Ltd. | Continuous annealing method for low coercive force cold-rolled electromagnetic pure iron plate and strip |
| CN106191410A (en) * | 2016-08-15 | 2016-12-07 | 山西太钢不锈钢股份有限公司 | A kind of method improving electromagnetic pure iron hot rolled plate pcrmeability |
| CN107794458A (en) * | 2016-08-30 | 2018-03-13 | 宝山钢铁股份有限公司 | Exempt from magnetized electromagnetic pure iron and its manufacture method with high warping resistance characteristic |
| CN107794458B (en) * | 2016-08-30 | 2019-09-06 | 宝山钢铁股份有限公司 | Exempt from magnetized electromagnetic pure iron and its manufacturing method with highly resistance bending characteristic |
| CN108118250A (en) * | 2016-11-30 | 2018-06-05 | 宝山钢铁股份有限公司 | A kind of warping resistance cracking exempts from magnetization annealing electromagnetic pure iron and its manufacturing method |
| CN107541591B (en) * | 2017-08-29 | 2019-11-15 | 西安汇丰精密合金制造有限公司 | A kind of manufacturing method of super electromagnetic pure iron DT4C bar |
| CN107541591A (en) * | 2017-08-29 | 2018-01-05 | 西安汇丰精密合金制造有限公司 | A kind of manufacture method of super electromagnetic pure iron DT4C bars |
| CN109097549A (en) * | 2018-06-30 | 2018-12-28 | 西安铁路信号有限责任公司 | A kind of electromagnetic pure iron vertical bar material cold-rolling process method |
| CN114517275A (en) * | 2020-11-20 | 2022-05-20 | 宝山钢铁股份有限公司 | Super electromagnetic pure iron cold-rolled plate strip and preparation method thereof |
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| CN1162564C (en) | 2004-08-18 |
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Granted publication date: 20040818 |