CN109082605A - A kind of production method of high frequency strip silicon steel - Google Patents

A kind of production method of high frequency strip silicon steel Download PDF

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Publication number
CN109082605A
CN109082605A CN201811174624.XA CN201811174624A CN109082605A CN 109082605 A CN109082605 A CN 109082605A CN 201811174624 A CN201811174624 A CN 201811174624A CN 109082605 A CN109082605 A CN 109082605A
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China
Prior art keywords
silicon
content
heating
controls
silicon steel
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Pending
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CN201811174624.XA
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Chinese (zh)
Inventor
高振宇
孟劲松
陈春梅
王洪涛
张智义
张仁波
李亚东
刘文鹏
周旭
赵健
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Priority to CN201811174624.XA priority Critical patent/CN109082605A/en
Publication of CN109082605A publication Critical patent/CN109082605A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

The present invention provides a kind of production method of high frequency strip silicon steel, and be suitable for bulk alloy content: silicon+manganese+aluminium is greater than 2.5% cold rolling non-orientation silicon steel；1) refining decarburization carries out alloying with silicon, then carry out aluminium alloying using silicon deoxidation later；2) harmful element content controls: sulfur content≤0.020%, nitrogen content≤0.0100%, niobium+vanadium+titanium entirety≤0.025%；3) continuous casting process controls 15~50 DEG C of the degree of superheat, 0.3~1.2m/min of pulling rate, controls slab column crystal ratio >=50%；4) slab hot rolling heating charging temperature requires >=300 DEG C, and the heating of neutral or reducing atmosphere, heating temperature≤1200 DEG C, heating time, control was at 180 minutes~240 minutes.Reach finished product effect is thinned and reduces the effect of eddy-current loss under electronic curing.The production control difficulty for reducing whole process, also avoids the technical difficulty of higher alloy content and the production of more thin slab product.

Description

A kind of production method of high frequency strip silicon steel
Technical field
The present invention relates to technical field of steel rolling, in particular to a kind of production method of high frequency strip silicon steel.
Background technique
Electrical steel product is widely used metal function soft magnetic materials, is mainly used in the iron of all kinds of motors and electric appliance Core manufacturing field.With the development of field of new energy technologies and the extensive use of converter technique, high frequency frequency-variable efficient motor is gradually As main product, requirements at the higher level are proposed to electrical sheet electromagnetic performance.On the one hand it requires to reach conventional in low frequency operation section Electromagnetic performance is horizontal, has high-frequency low-consumption characteristic in medium-high frequency operation interval product, brings more lance for electrical steel product The performance indicator requirement of shield.
For the growth requirement for meeting high frequency efficient motor and new energy power motor, in high grade silicon steel production technology On the basis of, in the design of high frequency special product, bulk alloy content is higher and higher, steel cleanliness and harmful residual control of element are wanted Ask also increasingly harsher, and product size gradually develops to thin gauge strip product direction.It is corresponding, it is production control Difficulty processed increases, the production cycle is long, cold-workability deterioration rolling recovery rate is low, and cost is substantially improved.
Summary of the invention
In order to solve the problems, such as described in background technique, the present invention provides a kind of production method of high frequency strip silicon steel, not On the basis of changing the high grade electric steel entirety production procedure of enterprise, mitigates steel cleanliness and control difficulty, pass through continuous casting two cold Technology controlling and process controls the orientation aggregation of harmful element and precipitate using high silicon steel coagulation mechanism characteristic；In subsequent rolling Cheng Renwei control plate thickness direction " layering " or plate thickness centre crystallization and crystal grain grow it is big-and-middle cause " tomography ", in conjunction with heat treatment The microstructure form controlled under technique reaches finished product and effect is thinned and reduces the effect of eddy-current loss under electronic curing.It reduces The production of whole process controls difficulty, also avoids the technical difficulty that higher alloy content and more thin slab product produce.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of production method of high frequency strip silicon steel, including smelting, heating, hot rolling, pickling, cold rolling and annealing are applicable in It is greater than 2.5% cold rolling non-orientation silicon steel in silicon+manganese+aluminium mass percentage content, the method includes as follows:
1) refining decarburization carries out alloying with silicon, then carry out aluminium alloying using silicon deoxidation later；
2) harmful element content controls: sulfur content≤0.020%, nitrogen content≤0.0100%, and niobium+vanadium+Ti content≤ 0.025%；Unit wt%；
3) continuous casting process control 15~50 DEG C of the degree of superheat, 0.3~1.2m/min of pulling rate, control slab column crystal ratio >= 50%；
4) slab hot rolling heating charging temperature requires >=300 DEG C, and neutral or reducing atmosphere heats, heating temperature≤1200 DEG C, heating time controls at 180 minutes~240 minutes.
Compared with prior art, the beneficial effects of the present invention are:
1) smelting, refining and continuous casting difficulty are significantly reduced, operating efficiency is improved；Avoid more high alloy content Design bring cold brittleness increases, cold rolling side splits defect and generates and break and occurs with accident；The something lost of column crystal (100) texture component It passes, advantageously to finished product isotropism；
2) sulphur, nitrogen and the restriction of niobium+vanadium+titanium whole content control the orientation aggregation of harmful element and precipitate；With The operation of rolling afterwards artificially control plate thickness direction " layering " or the crystallization of plate thickness centre and crystal grain it is long it is big-and-middle cause " tomography ", Achieve the effect that finished product is thinned and reduces eddy-current loss under electronic curing；
3) implement through this technical solution, tiny " line " shape layering is presented in product fractography or similar " being mingled with " is layered shape State plays the role of steel band and is thinned and reduces high-frequency loss.
Detailed description of the invention
Fig. 1 is the columanar structure's figure for controlling high silicon steel (Si:2.60%) slab prosperity.
Specific embodiment
Specific embodiment provided by the invention is described in detail below in conjunction with attached drawing.
A kind of production method of high frequency strip silicon steel, including smelting, heating, hot rolling, pickling, cold rolling and annealing are applicable in It is greater than 2.5% cold rolling non-orientation silicon steel in silicon+manganese+aluminium mass percentage content, is magnetic characteristic under a kind of electronic curing state The production technology method of excellent high grade electrical steel product is suitable for various casting casting machines, does not need electromagnetic agitation and electromagnetism The measures such as braking.
The method includes as follows:
1) refining decarburization carries out alloying with silicon, then carry out aluminium alloying using silicon deoxidation later；
2) harmful element content controls: sulfur content≤0.020%, nitrogen content≤0.0100%, niobium+vanadium+titanium whole content ≤ 0.025%；Unit wt%；
Sulphur, nitrogen and the restriction of niobium+vanadium+titanium whole content are the orientation aggregations in order to control harmful element and precipitate；? The subsequent operation of rolling artificially control plate thickness direction " layering " or the crystallization of plate thickness centre and crystal grain it is long it is big-and-middle cause it is " disconnected Layer " achievees the effect that finished product is thinned and reduces eddy-current loss under electronic curing.Ingredient is also unsuitable excessively high simultaneously, will affect slab Quality and finished product electromagnetic performance.
3) continuous casting process controls 15~50 DEG C of the degree of superheat, 0.3~1.2m/min of pulling rate, and leads the thermally conductive system of temperature according to high silicon steel The mechanistic features of number difference, control slab column crystal ratio >=50%；As shown in Figure 1, to control high silicon steel (Si:2.60%) slab Flourishing columanar structure's figure.
4) slab hot rolling heating charging temperature requires >=300 DEG C, and neutral or reducing atmosphere heats, heating temperature≤1200 DEG C, heating time need to reach soaking inside and outside slab, meet hot rolling plasticity, and heating time controls at 180 minutes~240 minutes.
5) finished product is made in the processes such as regular practice, cold rolling, annealing and insulating coating.
Final finished electromagnetic detection is detected respectively by edge, middle part；Implement through this technical solution, product fractography is presented Tiny " line " shape layering or similar " being mingled with " stratification state play the role of steel band and are thinned and reduce high-frequency loss.
Embodiment 1
Bulk alloy mass percentage content (silicon+manganese+aluminium) is 3.81%, wherein 2.95%Si, 0.53%Al, 0.33% Mn；
After refining decarburization, after silicon deoxidation, alloying with silicon is carried out, then carry out aluminium alloying；Composition Control: S: 0.0085%, N:0.0050%, (Ni+V+Ti): 0.022%；25 DEG C of the continuous casting degree of superheat, pulling rate 0.5m/min, column crystal ratio 56%；Hot rolling charging temperature: 450 DEG C, 1100 DEG C of heating temperature, heating time 220 minutes.
Embodiment 2
Bulk alloy mass percentage content (silicon+manganese+aluminium) is 4.01%, wherein 2.75%Si, 0.83%Al, 0.43% Mn；
After refining decarburization, after silicon deoxidation, alloying with silicon is carried out, then carry out aluminium alloying；Composition Control: S: 0.0105%, N:0.0035%, (Ni+V+Ti): 0.025%；20 DEG C of the continuous casting degree of superheat, pulling rate 0.9m/min, column crystal ratio 67%；Hot rolling charging temperature: 390 DEG C, 1150 DEG C of heating temperature, heating time 190 minutes.
Embodiment 3
Bulk alloy mass percentage content (silicon+manganese+aluminium) is 4.70%, wherein 3.32%Si, 1.13%Al, 0.25% Mn；
After refining decarburization, after silicon deoxidation, alloying with silicon is carried out, then carry out aluminium alloying；Composition Control: S: 0.0010%, N:0.0045%, (Ni+V+Ti): 0.018%；30 DEG C of the continuous casting degree of superheat, pulling rate 0.6m/min, column crystal ratio 75%；Hot rolling charging temperature: 490 DEG C, 1120 DEG C of heating temperature, heating time 210 minutes.
Embodiment 4
Bulk alloy mass percentage content (silicon+manganese+aluminium) is 4.50%, wherein 3.17%Si, 0.98%Al, 0.35% Mn；
After refining decarburization, after silicon deoxidation, alloying with silicon is carried out, then carry out aluminium alloying；Composition Control: S: 0.0020%, N:0.0040%, (Ni+V+Ti): 0.019%；26 DEG C of the continuous casting degree of superheat, pulling rate 0.7m/min, column crystal ratio 73%；Hot rolling charging temperature: 400 DEG C, 1130 DEG C of heating temperature, heating time 200 minutes.
Performance indicator (P10/400) and lumber recovery be as follows:
Above embodiments are implemented under the premise of the technical scheme of the present invention, give detailed embodiment and tool The operating process of body, but protection scope of the present invention is not limited to the above embodiments.Method therefor is such as without spy in above-described embodiment Not mentionleting alone bright is conventional method.

Claims (1)

1. a kind of production method of high frequency strip silicon steel, including smelting, heating, hot rolling, pickling, cold rolling and annealing, feature exist In, suitable for silicon+manganese+aluminium mass percentage content be greater than 2.5% cold rolling non-orientation silicon steel, which comprises
1) refining decarburization carries out alloying with silicon, then carry out aluminium alloying using silicon deoxidation later；
2) harmful element content controls: sulfur content≤0.020%, nitrogen content≤0.0100%, and niobium+vanadium+Ti content≤ 0.025%；Unit wt%；
3) continuous casting process controls 15~50 DEG C of the degree of superheat, 0.3~1.2m/min of pulling rate, controls slab column crystal ratio >=50%；
4) slab hot rolling heating charging temperature requires >=300 DEG C, and neutral or reducing atmosphere heats, heating temperature≤1200 DEG C, Heating time controls at 180 minutes~240 minutes.
CN201811174624.XA 2018-10-09 2018-10-09 A kind of production method of high frequency strip silicon steel Pending CN109082605A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104294022A (en) * 2014-10-10 2015-01-21 北京科技大学 Preparation method of high-magnetic-strength thin-gauge non-oriented silicon steel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104294022A (en) * 2014-10-10 2015-01-21 北京科技大学 Preparation method of high-magnetic-strength thin-gauge non-oriented silicon steel

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