CN107385179A - A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece - Google Patents
A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece Download PDFInfo
- Publication number
- CN107385179A CN107385179A CN201710586069.0A CN201710586069A CN107385179A CN 107385179 A CN107385179 A CN 107385179A CN 201710586069 A CN201710586069 A CN 201710586069A CN 107385179 A CN107385179 A CN 107385179A
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- China
- Prior art keywords
- silicon steel
- production technology
- magnetic induction
- rolled
- high magnetic
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1266—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest between cold rolling steps
Abstract
The invention discloses a kind of production technology of modified non-oriented silicon steel with high magnetic induction piece, the production technology of the modified non-oriented silicon steel with high magnetic induction piece comprises the following steps：S101：Hot-rolled coil is made in steel billet；S102：Pickling after hot-rolled coil normalizing treatment, then it is cold rolled to thin coiled stock；S103：Cold rolling coil coat pretreating agent；104：Decarburizing annealing is carried out by hydrogen-nitrogen mixture gas stove；S105：Small reduction ratio cold rolling is carried out after annealing；S106：Smear dielectric film；S107：Finished product, it is low to which solve the silicon steel sheet magnetic strength of prior art production, production efficiency, the problems such as power consumption is high, production cost is high.
Description
Technical field
The invention belongs to silicon steel production technical field, concretely relates to a kind of modified non-oriented silicon steel with high magnetic induction piece
Production technology.
Background technology
Silicon steel is a kind of Antaciron.The sheet material rolled with silicon steel is soft magnetic materials most widely used in electrical field, because
And silicon steel sheet is also known as electrical sheet；Silicon steel sheet is widely used in motor, generator, transformer, choke coil, electromagnetic mechanism, relay
In device and measuring instrumentss.
The most important purposes of cold rolling non-orientation silicon steel piece is to be used to generator manufacture, therefore also known as Cold rolling motor silicon steel, nothing take
It is the silicon steel sheet that No yield point deformation crystalline texture is formed according to certain production technology to silicon steel sheet.
The minimizing of electronic product, efficient development trend, it is desirable to which non-orientation silicon steel raw material has lower iron loss and more
High magnetic strength.And the non-orientation silicon steel largely used currently on the market, in order to realize low iron loss, it is necessary to sacrifice magnetic strength as generation
Valency, improve Si, Al content.And rear process carries out that surface oxidation easily occurs during carbonization treatment, deteriorates iron loss and magnetic strength, electromagnetically
It can be difficult to meet to require.
Existing technology is there is silicon steel sheet magnetic strength is low, low production efficiency, and power consumption is high, and production cost is high, deficiency in economic performance
The problem of.
The content of the invention
It is an object of the invention to provide a kind of production technology of modified non-oriented silicon steel with high magnetic induction piece, which solve existing
The silicon steel sheet magnetic strength of technology production is low, production efficiency, the problems such as power consumption is high, production cost is high.
In order to solve the above technical problems, the object of the present invention is achieved like this：
A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece, it is characterised in that：The high-magnetic strength non-oriented silicon of the modified
The production technology of steel disc comprises the following steps：
Step 1：By hot rolling of steel billet into hot-rolled coil；
Step 2：By pickling after hot-rolled coil normalizing, then it is cold rolled to thin cold rolling strap volume；
Step 3：Cold rolling coil coat pretreating agent；
Step 4：Decarburization of intermediate annealing is carried out by hydrogen-nitrogen mixture gas stove, the carbon that the thin cold rolling strap after cold rolling is rolled up is contained
Amount disposably drops to design load.
Step 5：The cold rolling of thin cold rolling strap volume within the specific limits is pushed into rate and carries out cold rolling.
Step 6：Apply insulating layer coating；
Step 7：Finished product；
On the basis of such scheme and as the preferred scheme of such scheme：In step 2, hot rolled strip is heated to
40 ~ 60min more than between 800-850 DEG C, after being incubated a period of time, take out in atmosphere or spray water from stove, spray or dry
Cooling, crystal grain refinement and distribution of carbides are homogenized, removes the internal stress of material；Pickling is carried out after normalizing, pickling can remove
Remove hot-rolled coil surface impurity and oxide.
On the basis of such scheme and as the preferred scheme of such scheme：In step 2, hot-rolled coil is carried out
The cold rolling of 3-4 roads, ensure that template is constant, finish to gauge thickness is 0.63mm, in order that finish to gauge thickness is accurate, once cold rolling needs to add suppression
Preparation, mainly make the crystal shape holding in hot-rolled coil stable and uniformly, prevent the magnetized reduction of product, the vulcanization of addition
0.1-0.5wt% containing manganese in manganese, sulfur-bearing 0.015-0.03wt%.
On the basis of such scheme and as the preferred scheme of such scheme：Pretreating agent in step 3 is that concentration is
18% to 30% vulcanization aqueous silicate solution.
On the basis of such scheme and as the preferred scheme of such scheme：In step 3, a middle decarburization will
It is 830-850 DEG C to seek temperature of steel strips, and in in-furnace time 6-8min, furnace atmosphere dew point is 40-45 DEG C, is tied again for the first time in follow-up
In brilliant process, the uniform complete, fine uniform of the recrystal grain to be formed can also be ensured, stopped when being less than 50PPM to phosphorus content
Only.
On the basis of such scheme and as the preferred scheme of such scheme：The rate that pushes in step 4 is 6-11%, will
Thin cold-rolled strip is cold-rolled between 0.35-0.5mm, now inhibitor manganese sulfide still its inhibitory action, ensure secondary cold-rolling it
Thickness of strips and template afterwards is good.
On the basis of such scheme and as the preferred scheme of such scheme：The insulating barrier of step 6 is by phosphate and chromium
Hydrochlorate forms, and phosphate and chromate play corrosion inhibition, can strengthen the resistance to corrosion on silicon steel sheet surface, and in silicon steel sheet
Surface forms insulating barrier, can greatly reduce be lost caused by the vortex between silicon steel sheet in use.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that：The present invention heightens furnace atmosphere dew-point temperature
To 40-45 DEG C, this adjusts specific annealing temperature and time according to this temperature, it is possible to reaches the requirement of a decarburization, is not required to
Increase any equipment and operating cost, process efficiency greatly improves.
In addition, 0.35-0.5mm is cold-rolled to using the small reduction ratios of 6-11%, when the cold rolling of this small reduction ratio can make annealing
Crystal grain is grown up, and iron loss reduces.
The product magnetic that so produces is high, iron loss is low, production efficiency is high, cost is low.
Brief description of the drawings
Fig. 1 is the production technological process of modified non-oriented silicon steel with high magnetic induction piece.
Embodiment
The present invention is described further below in conjunction with accompanying drawing：
As shown in Figure 1
A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece specifically includes following steps：
S101：Hot-rolled coil is made in steel billet；
S102：Pickling after hot-rolled coil normalizing treatment, then it is cold rolled to thin coiled stock；
S103：Cold rolling coil coat pretreating agent；
S104：Decarburizing annealing is carried out by hydrogen-nitrogen mixture gas stove；
S105：Small reduction ratio cold rolling is carried out after annealing；
S106：Smear dielectric film；
S107：Finished product.
Preferably, in S101, described steel billet silicon content is 0.5% to 3.0%；The thickness of described hot-rolled coil is
2.0 millimeters to 2.6 millimeters.
Preferably, in S102,40 ~ 60min between hot rolled strip is heated into 800-850 DEG C, after being incubated a period of time,
Taken out from stove in atmosphere or water spray, spraying or quenching, then carry out pickling.
Preferably, in S103, described pretreating agent is the vulcanization aqueous silicate solution that concentration is 15% to 35%.
Preferably, in S103, described annealing temperature temperature of steel strips is 830-850 DEG C, in in-furnace time 6-8min, stove
Interior dew point of atmosphere temperature is 40-45 DEG C, and the phosphorus content of steel band is dropped into 50PPM.
Preferably, in S103,50% to 60% nitrogen is contained in described hydrogen-nitrogen mixture gas；Described hydrogen nitrogen mixes
Close in gas and contain 20% to 30% hydrogen；
Preferably, in S104, described cold rolling is cold-rolled to 0.35 millimeter to 0.5 millimeter using 6% to 11% small reduction ratio, can
Crystal during annealing is set to grow up, iron loss reduces.
Preferably, in S105, described dielectric film is made up of phosphate and chromate.
Embodiment 1：
Raw material：Hot-rolled coil is made using Q235 steel billets.
Normalizing treatment：Hot rolled strip is heated to 800 DEG C of lasting 40min.
Thickness 0.50mm thin coiled stocks are cold rolled to after pickling, composition is：C<0.12%, Si<0.31%, Mn<0.11%, P<
0.025%, S<0.025%, Al<0.04%；
Pretreating agent：Concentration is 18% vulcanization aqueous silicate solution；
Protective gas：The hydrogen of 60% nitrogen+23%
Decarburizing annealing：The cold-rolled steel sheet for coating pretreating agent is inserted and carries out annealing decarburizing annealing by hydrogen-nitrogen mixture gas stove,
830 degree of annealing temperature, it is 6min in in-furnace time, anneals 1 hour (insulation) time, furnace atmosphere dew-point temperature is 40 DEG C
Detection：C content in steel plate is down to 49.9ppm, and the high magnetic strength silicon steel sheet finished product magnetic of acquisition is：P15=5.20W, B50
=1.90T.
Embodiment 2：
Raw material：Hot-rolled coil is made using Q235 steel billets.
Normalizing treatment：Hot rolled strip is heated to 850 DEG C of lasting 60min.
Thickness 0.45mm thin coiled stocks are cold rolled to after pickling, composition is：C<0.14%, Si<0.30%, Mn<0.12%, P<
0.025%, S<0.025%, Al<0.04%；
Pretreating agent：Concentration is 30% vulcanization aqueous silicate solution；
Protective gas：The hydrogen of 55% nitrogen+30%；
Decarburizing annealing：The cold-rolled steel sheet for coating pretreating agent is inserted and carries out annealing decarburizing annealing by hydrogen-nitrogen mixture gas stove,
850 degree of annealing temperature, anneal 1.5 hours (insulation) time.
Detection：C content in steel plate is down to 50ppm, and the high magnetic strength silicon steel sheet finished product magnetic of acquisition is：P15=5.22W,
B50=1.91T.
The result shows that this method technique improves non-oriented silicon steel sheet magnetic strength, reduces iron loss, improves production effect
Rate, reduces energy input and cost is adapted to industrialization production.
Using technical solutions according to the invention, or those skilled in the art is under the inspiration of technical solution of the present invention,
Similar technical scheme is designed, and reaches above-mentioned technique effect, is to fall into protection scope of the present invention.Above-described embodiment
Only presently preferred embodiments of the present invention, not limit the scope of the invention according to this, therefore：All structures under this invention, shape,
The equivalence changes that principle is done, it all should be covered by within protection scope of the present invention.
Claims (8)
- A kind of 1. production technology of modified non-oriented silicon steel with high magnetic induction piece, it is characterised in that：The modified is high-magnetic strength non-oriented The production technology of silicon steel sheet comprises the following steps：Step 1：By hot rolling of steel billet into hot-rolled coil；Step 2：By pickling after hot-rolled coil normalizing, then it is cold rolled to thin cold rolling strap volume；Step 3：Cold rolling coil coat pretreating agent；Step 4：Decarburization of intermediate annealing is carried out by hydrogen-nitrogen mixture gas stove, the carbon that the thin cold rolling strap after cold rolling is rolled up is contained Amount disposably drops to design load.
- 2. step 5：The cold rolling reduction ratio of thin cold rolling strap volume within the specific limits is subjected to cold rolling.
- 3. step 6：Apply insulating layer coating；Step 7：Finished product；A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that：In step In rapid two, the normalizing temperature of hot rolled strip is 800-850 DEG C.
- A kind of 4. production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that： In step 2, hot-rolled coil is subjected to 3-4 road cold rollings, ensures that template is constant, finish to gauge thickness is 0.63mm.
- A kind of 5. production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that：Step Pretreating agent in rapid three is the vulcanization aqueous silicate solution that concentration is 18% to 30%.
- A kind of 6. production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that： In step 3, a middle decarburization requires that temperature of steel strips is 830-850 DEG C, in in-furnace time 6-8min, furnace atmosphere dew point temperature Spend for 40-45 DEG C.
- A kind of 7. production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that：Step Reduction ratio in rapid four is 6-11%, and thin cold-rolled strip is cold-rolled between 0.35-0.5mm.
- A kind of 8. production technology of modified non-oriented silicon steel with high magnetic induction piece according to claim 1, it is characterised in that：Step Rapid six insulating barrier is made up of phosphate and chromate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710586069.0A CN107385179A (en) | 2017-07-18 | 2017-07-18 | A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710586069.0A CN107385179A (en) | 2017-07-18 | 2017-07-18 | A kind of production technology of modified non-oriented silicon steel with high magnetic induction piece |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921956A (en) * | 2010-06-23 | 2010-12-22 | 北京科技大学 | High-magnetic induction, low-iron loss, low-carbon, low-silicon and non-oriented electrical steel and manufacturing method thereof |
| CN102418034A (en) * | 2011-12-14 | 2012-04-18 | 武汉钢铁(集团)公司 | Production method for high-grade non-oriented silicon steel |
| CN102534158A (en) * | 2012-02-03 | 2012-07-04 | 无锡华精新型材料有限公司 | Production process of high-precision cold-rolled oriented silicon steel strips |
| CN106119496A (en) * | 2016-08-08 | 2016-11-16 | 浙江华赢特钢科技有限公司 | A kind of production technology of modified model non-oriented silicon steel with high magnetic induction sheet |
-
2017
- 2017-07-18 CN CN201710586069.0A patent/CN107385179A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921956A (en) * | 2010-06-23 | 2010-12-22 | 北京科技大学 | High-magnetic induction, low-iron loss, low-carbon, low-silicon and non-oriented electrical steel and manufacturing method thereof |
| CN102418034A (en) * | 2011-12-14 | 2012-04-18 | 武汉钢铁(集团)公司 | Production method for high-grade non-oriented silicon steel |
| CN102534158A (en) * | 2012-02-03 | 2012-07-04 | 无锡华精新型材料有限公司 | Production process of high-precision cold-rolled oriented silicon steel strips |
| CN106119496A (en) * | 2016-08-08 | 2016-11-16 | 浙江华赢特钢科技有限公司 | A kind of production technology of modified model non-oriented silicon steel with high magnetic induction sheet |
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Application publication date: 20171124 |