CN102383045A - Preparation method of silicon steel for motors - Google Patents
Preparation method of silicon steel for motors Download PDFInfo
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- CN102383045A CN102383045A CN2011103418148A CN201110341814A CN102383045A CN 102383045 A CN102383045 A CN 102383045A CN 2011103418148 A CN2011103418148 A CN 2011103418148A CN 201110341814 A CN201110341814 A CN 201110341814A CN 102383045 A CN102383045 A CN 102383045A
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Abstract
The present invention discloses a preparation method of silicon steel for motors. Se, Ca, Cr and Ce elements are added into routine components of the silicon steel, wherein Se and Ca facilitate controlling for form and distribution of precipitate, thereby affecting the texture. The added Cr and Ce elements can greatly improve magnetic performance of the silicon steel for obtaining a magnetic performance with a magnetic induction intensity B50 of 1.8-1.86T and an iron loss P1.5 of 2.5-2.7W/kg. Simultaneously coaction of the four elements and other routine alloying elements improves microscopic texture of electric steel for further improving mechanical property of the steel. The technological parameter of each step of the preparation method is correspondingly adjusted according to component adjustment, and the alloy component adjustment effect can be fully exerted.
Description
Technical field
The present invention relates to metallic substance and prepare manufacture field, particularly a kind of motor is with the preparation method of silicon steel.
Background technology
High-efficiency non-oriented electrical steel for motor grows up from the low-carbon low-silicon steel basis; Compare with traditional product; Because of it possesses high magnetic strength with the obvious advantage and lower over-all propertieies such as iron loss are extensively approved by market, the favor in the markets such as compressor of middle and small motor, refrigerator or air-conditioning that especially the big use frequency of usage quantity is high simultaneously.Along with all kinds of micro motors, compressor etc. to efficient, miniaturized development, motor, the large-scale annealing device of compressor user perfect, the cold rolling non-oriented electrical steel of low-iron loss high-magnetic strength becomes exploitation focus in recent years.For this reason, the low iron loss non-oriented electrical steel that a large amount of scientific efforts is developed high magnetic strength has all been done by each iron and steel enterprise and research institutions.Each enterprise or research institution set up timing separately being carried out to; Except further raising steel cleanliness factor; General consider to realize the product performance of high-magnetic induction, low-iron loss through in the grain boundary segregation elements such as compound interpolation Sn, Cu, Sb, Se, P, B one or more, and through the control hot rolling, curl and the hot-rolled sheet annealing process improves the finished product magnetic property.
Application number is composition and the production technique thereof that 95194275.1 one Chinese patent application discloses a kind of high magnetic sensing cold milling orientation less electrical steel, and its principal character is to improve that the Mn element is to 1.0wt% in the steel, and C, S, N content all are no more than 30ppm, and hot rolling finish to gauge is at Ar
3+ 50 phase regions, Ar
1-50 ℃～(Ar
1+ Ar
3Curl and self-annealing in)/2, can obtain B5000 is the high magnetic induction performance of 1.79～1.80T, but core loss value P1.5＞5.0w/kg simultaneously, can not obtain the characteristic of high magnetic strength and low iron loss simultaneously.
Application number is that 01138224.4 one Chinese patent application discloses a kind of method of manufacture of producing the cold rolling non-oriented electrical steel of low-iron loss high-magnetic strength, its composition characteristics is≤and 2.0%Si, 0.7-0.8%Mn, 0.23% (P+Sn/Sb), the content of restriction B; Extremely low S, N, its technology characteristics is 1100～1150 ℃ of slab heating, pickling, cold rolling; Humidification decarburization during annealing; It is higher that P+Sn/Sb adds content though gained has excellent magnetic characteristics, and ME is complicated, and production cost is higher.
It is a kind of through control Si, Mn, Al alloying constituent content with optimize hot-rolled condition that application number is that 200580044009.1 one Chinese patent application discloses, and makes the electrical sheet of handling without the hot-rolled sheet normalizing also have very low iron loss and higher magneticflux-density.1.0～3.0wt%Si, 0.1～2.0wt%Mn, 0.1～1.5wt%Al; Wherein Mn and Al satisfy-0.2＜m (=Mn-Al)＜1.0; At two-phase region, 650 ℃～800 ℃ curl controlling hot rolling more than 70%, and hot-rolled sheet is handled without normalizing; P1.5 is 2.8～3.2w/kg, but B5000 has only 1.73～1.75T.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide the preparation method of a kind of motor with silicon steel.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of motor is with the preparation method of silicon steel; Said silicon steel contains following component: C≤0.005%, Si:2.2%～2.5%, Mn:0.05%～0.15%, Se:0.03%～0.10%, Cr:0.7%～1.3%, Ca:0.02%～0.08%, Ce:0.4%～0.8%, Al:0.2%～0.7%, P≤0.03%, S≤0.01%, N≤0.003% by weight percentage; All the other are iron and a small amount of inclusion, are mingled with total amount≤0.03%; Said preparation method comprises the following steps:
1) smelt: adopt electric furnace or converter smelting, hydrogen and nitrogen obnoxious flavour in the steel removed in vacuum refinement, the control carbon content, and adopt the silicon deoxidation;
2) continuous casting: adopt the continuous casting mode that molten steel is cast base;
3) hot rolling and curling: strand is heated to 1170～1200 ℃, carries out hot rolling after temperature is even, finishing temperature adopts multi-pass rolling greater than 880 ℃, and the hot-rolled sheet gauge control is at 2.0～2.5mm; 720～740 ℃ of coiling temperature controls
4) cold rolling: adopt the tandem rolling mode to adopt the secondary cold-rolling mode that has process annealing to be rolled into finished product thickness hot-rolled sheet, the process annealing temperature is 950～970 ℃, and the time is 4～6 minutes;
5) annealing: cold-rolled steel strip is 1010～1040 ℃ through continuous annealing furnace decarburizing annealing, annealing temperature, soaking time 3～5min, and atmosphere is 75%H
2+ 25%N
2
6) pickling, be coated with layer of cloth and the packing.
The present invention compared with prior art has following beneficial effect:
Through in silicon steel, adding Se, Ca, Cr, Ce element, and rationally control its content separately, make it bring into play its effect separately and produce synergy, wherein Se and Ca help controlling the form and the distribution of precipitate, thereby influence texture; And the magnetic performance that Cr that adds and Ce element can increase substantially silicon steel reaches it: magnetic induction density B
501.8～1.86T, iron loss P
1.52.5 the magnetic property that～2.7W/kg is such; Four kinds of elements and other conventional alloy element acting in conjunction simultaneously improved the microtexture of electrical steel, and then improves the mechanical property of steel.Also adjustment adjusts accordingly the processing parameter of each step of said preparation method according to composition, makes the effect of alloying constituent adjustment be able to give full play to.
Through embodiment the present invention is done further description below.
Embodiment
Embodiment one
A kind of motor is with the preparation method of silicon steel; Said silicon steel contains following component: C≤0.005%, Si:2.2%, Mn:0.15%, Se:0.03%, Cr:1.3%, Ca:0.02%, Ce:0.8%, Al:0.2%, P≤0.03%, S≤0.01%, N≤0.003% by weight percentage; All the other are iron and a small amount of inclusion, are mingled with total amount≤0.03%; Said preparation method comprises the following steps:
1) smelt: adopt electric furnace or converter smelting, hydrogen and nitrogen obnoxious flavour in the steel removed in vacuum refinement, the control carbon content, and adopt the silicon deoxidation;
2) continuous casting: adopt the continuous casting mode that molten steel is cast base;
3) hot rolling and curling: strand is heated to 1170 ℃, carries out hot rolling after temperature is even, finishing temperature adopts multi-pass rolling greater than 880 ℃, and the hot-rolled sheet gauge control is at 2.5mm; 720 ℃ of coiling temperature controls
4) cold rolling: adopt the tandem rolling mode to adopt the secondary cold-rolling mode that has process annealing to be rolled into finished product thickness hot-rolled sheet, the process annealing temperature is 950 ℃, and the time is 6 minutes;
5) annealing: cold-rolled steel strip is 1010 ℃ through continuous annealing furnace decarburizing annealing, annealing temperature, soaking time 5min, and atmosphere is 75%H
2+ 25%N
2
6) pickling, be coated with layer of cloth and the packing.
Embodiment two
A kind of motor is with the preparation method of silicon steel; Said silicon steel contains following component: C≤0.005%, Si:2.5%, Mn:0.05%, Se:0.10%, Cr:0.7%, Ca:0.08%, Ce:0.4%, Al:0.7%, P≤0.03%, S≤0.01%, N≤0.003% by weight percentage; All the other are iron and a small amount of inclusion, are mingled with total amount≤0.03%; Said preparation method comprises the following steps:
1) smelt: adopt electric furnace or converter smelting, hydrogen and nitrogen obnoxious flavour in the steel removed in vacuum refinement, the control carbon content, and adopt the silicon deoxidation;
2) continuous casting: adopt the continuous casting mode that molten steel is cast base;
3) hot rolling and curling: strand is heated to 1200 ℃, carries out hot rolling after temperature is even, finishing temperature adopts multi-pass rolling greater than 880 ℃, and the hot-rolled sheet gauge control is at 2.0mm; 740 ℃ of coiling temperature controls
4) cold rolling: adopt the tandem rolling mode to adopt the secondary cold-rolling mode that has process annealing to be rolled into finished product thickness hot-rolled sheet, the process annealing temperature is 970 ℃, and the time is 4 minutes;
5) annealing: cold-rolled steel strip is 1040 ℃ through continuous annealing furnace decarburizing annealing, annealing temperature, soaking time 3min, and atmosphere is 75%H
2+ 25%N
2
6) pickling, be coated with layer of cloth and the packing.
Embodiment three
A kind of motor is with the preparation method of silicon steel; Said silicon steel contains following component: C≤0.005%, Si:2.4%, Mn:0.10%, Se:0.06%, Cr:1.0%, Ca:0.05%, Ce:0.6%, Al:0.5%, P≤0.03%, S≤0.01%, N≤0.003% by weight percentage; All the other are iron and a small amount of inclusion, are mingled with total amount≤0.03%; Said preparation method comprises the following steps:
1) smelt: adopt electric furnace or converter smelting, hydrogen and nitrogen obnoxious flavour in the steel removed in vacuum refinement, the control carbon content, and adopt the silicon deoxidation;
2) continuous casting: adopt the continuous casting mode that molten steel is cast base;
3) hot rolling and curling: strand is heated to 1185 ℃, carries out hot rolling after temperature is even, finishing temperature adopts multi-pass rolling greater than 880 ℃, and the hot-rolled sheet gauge control is at 2.3mm; 730 ℃ of coiling temperature controls
4) cold rolling: adopt the tandem rolling mode to adopt the secondary cold-rolling mode that has process annealing to be rolled into finished product thickness hot-rolled sheet, the process annealing temperature is 960 ℃, and the time is 5 minutes;
5) annealing: cold-rolled steel strip is 1030 ℃ through continuous annealing furnace decarburizing annealing, annealing temperature, soaking time 4min, and atmosphere is 75%H
2+ 25%N
2
6) pickling, be coated with layer of cloth and the packing.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. a motor is with the preparation method of silicon steel; It is characterized in that; Said silicon steel contains following component: C≤0.005%, Si:2.2%～2.5%, Mn:0.05%～0.15%, Se:0.03%～0.10%, Cr:0.7%～1.3%, Ca:0.02%～0.08%, Ce:0.4%～0.8%, Al:0.2%～0.7%, P≤0.03%, S≤0.01%, N≤0.003% by weight percentage; All the other are iron and a small amount of inclusion, are mingled with total amount≤0.03%; Said preparation method comprises the following steps:
1) smelt: adopt electric furnace or converter smelting, hydrogen and nitrogen obnoxious flavour in the steel removed in vacuum refinement, the control carbon content, and adopt the silicon deoxidation;
2) continuous casting: adopt the continuous casting mode that molten steel is cast base;
3) hot rolling and curling: strand is heated to 1170～1200 ℃, carries out hot rolling after temperature is even, finishing temperature adopts multi-pass rolling greater than 880 ℃, and the hot-rolled sheet gauge control is at 2.0～2.5mm; 720～740 ℃ of coiling temperature controls
4) cold rolling: adopt the tandem rolling mode to adopt the secondary cold-rolling mode that has process annealing to be rolled into finished product thickness hot-rolled sheet, the process annealing temperature is 950～970 ℃, and the time is 4～6 minutes;
5) annealing: cold-rolled steel strip is 1010～1040 ℃ through continuous annealing furnace decarburizing annealing, annealing temperature, soaking time 3～5min, and atmosphere is 75%H
2+ 25%N
2
6) pickling, be coated with layer of cloth and the packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103418148A CN102383045A (en) | 2011-11-02 | 2011-11-02 | Preparation method of silicon steel for motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103418148A CN102383045A (en) | 2011-11-02 | 2011-11-02 | Preparation method of silicon steel for motors |
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| CN102383045A true CN102383045A (en) | 2012-03-21 |
Family
ID=45822872
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937123A (en) * | 2012-12-27 | 2015-09-23 | Posco公司 | Grain oriented electrical steel sheet having excellent core loss, and method for manufacturing same |
| CN109112283A (en) * | 2018-08-24 | 2019-01-01 | 武汉钢铁有限公司 | The preparation method of low temperature high magnetic induction grain-oriented silicon steel |
| CN111155023A (en) * | 2020-01-17 | 2020-05-15 | 上海大学 | Preparation method of high-toughness high-strength non-oriented high-silicon steel |
| CN111850254A (en) * | 2020-08-17 | 2020-10-30 | 綦江重配齿轮有限公司 | Method for preventing spline shaft from medium-frequency quenching deformation |
-
2011
- 2011-11-02 CN CN2011103418148A patent/CN102383045A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104937123A (en) * | 2012-12-27 | 2015-09-23 | Posco公司 | Grain oriented electrical steel sheet having excellent core loss, and method for manufacturing same |
| JP2016509625A (en) * | 2012-12-27 | 2016-03-31 | ポスコ | Oriented electrical steel sheet with excellent iron loss and method for producing the same |
| EP2940170A4 (en) * | 2012-12-27 | 2016-06-15 | Posco | Grain oriented electrical steel sheet having excellent core loss, and method for manufacturing same |
| US9847158B2 (en) | 2012-12-27 | 2017-12-19 | Posco | Grain oriented electrical steel sheet having excellent core loss, and method for manufacturing same |
| US10109405B2 (en) | 2012-12-27 | 2018-10-23 | Posco | Grain oriented electrical steel sheet having excellent core loss, and method for manufacturing same |
| CN109112283A (en) * | 2018-08-24 | 2019-01-01 | 武汉钢铁有限公司 | The preparation method of low temperature high magnetic induction grain-oriented silicon steel |
| CN111155023A (en) * | 2020-01-17 | 2020-05-15 | 上海大学 | Preparation method of high-toughness high-strength non-oriented high-silicon steel |
| CN111155023B (en) * | 2020-01-17 | 2021-12-03 | 上海大学 | Preparation method of high-toughness high-strength non-oriented high-silicon steel |
| CN111850254A (en) * | 2020-08-17 | 2020-10-30 | 綦江重配齿轮有限公司 | Method for preventing spline shaft from medium-frequency quenching deformation |
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Application publication date: 20120321 |