CN106350631A - Production method of armco iron for amorphous soft magnetic materials - Google Patents

Production method of armco iron for amorphous soft magnetic materials Download PDF

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Publication number
CN106350631A
CN106350631A CN201610874749.8A CN201610874749A CN106350631A CN 106350631 A CN106350631 A CN 106350631A CN 201610874749 A CN201610874749 A CN 201610874749A CN 106350631 A CN106350631 A CN 106350631A
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CN
China
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content
during
production method
soft magnetic
continuous casting
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CN201610874749.8A
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Chinese (zh)
Inventor
王坤
朱殷翔
杨子森
孙齐松
吕迺冰
徐士新
孔祥涛
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Shougang Corp
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Shougang Corp
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Priority to CN201610874749.8A priority Critical patent/CN106350631A/en
Publication of CN106350631A publication Critical patent/CN106350631A/en
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    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • C21C7/076—Use of slags or fluxes as treating agents
    • 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
    • C21C7/10—Handling in a vacuum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention relates to a production method of armco iron for amorphous soft magnetic materials, which belongs to the technical field of smelting of armco iron. The production method comprises the steps that during KR hot metal desulfurization pretreatment, the sulfur content is controlled to be less than or equal to 0.002wt%; during converter smelting, the outlet temperature is controlled to 1650 to 1750 DEG C by adopting a double-slag smelting process; during LF refining, submerged-arc slagging and heating treatment is performed, and a refining period is controlled to 20 to 35 min; during RH vacuum refining, forced decarburization is performed, and aluminum granules are added for deoxidation; during continuous casting, a full-protection continuous casting machine is used for pouring. The production method has the advantage that an armco iron product, which is produced by smelting, for the amorphous soft magnetic materials can satisfy the technical indicator requirements of amorphous and ultramicrocrystal magnetic materials which are processed and produced by high-end users.

Description

A kind of production method of amorphous soft magnetic material ingot iron
Technical field
The invention belongs to ingot iron technical field of smelting, particularly to a kind of amorphous soft magnetic material ingot iron Production method.It is mainly used in amorphous soft magnetic material and iron-based, cobalt-based, the smelting life of iron nickel base alloy material ingot iron Product aspect.
Background technology
Amorphous soft magnetic material includes iron-based, cobalt-based, iron nickel base alloy, and ultracrystallite is nano crystal soft magnetic material again, and (it is brilliant Grain size is nm level).At present, it is mainly used in high temperature alloy, electrothermal alloy by the yt0 Series Industrial pure iron product that GB produces And the field such as crystalline state magnetically soft alloy material, also include the application of pure iron as raw material simultaneously.Amorphous state and ultracrystallite magnetic material The preparation of material needs the ingot iron of high-quality as base material, sometimes even needs ultrapure ingot iron, produces by GB Yt0 Series Industrial pure iron product far can not meet the technical requirement of user.
Content of the invention
It is an object of the invention to provide a kind of production method of amorphous soft magnetic material ingot iron.Take kr molten iron Pretreatment desulfurizing technique carries out deep desulfurization process, after kr desulfurization process, enters molten steel sulfur content≤0.002% of converter.Turn Stove is smelted and is combined with rh vacuum refining, realizes the control of the extremely low composition of amorphous soft magnetic material ingot iron, effectively improves The cleanliness factor of molten steel, in steel, residual element content reaches extremely low level, and entire oxygen content in the steel content controls to below 100ppm.
A kind of production method of amorphous soft magnetic material ingot iron, concrete steps and parameter are as follows:
1), when carrying out kr desulfurizing iron pretreating process, sulfur content controls to≤0.002wt%；
2), during converter smelting, take double slag melting techniques, carry out bottom blowing process control simultaneously, add high aluminium content slag making Material, carries out ladle top slag modifying process.Control outlet temperature at 1650-1750 DEG C, endpoint carbon content≤0.04wt%, terminal silicon Content≤0.01wt%, terminal manganese content≤0.10wt%, end phosphorus content≤0.010wt%, final sulfur content≤ 0.005wt%.
3) carry out submerged arc slag making hyperthermic treatment during lf refine, refining cycle is pressed 20-35min and controlled, lf refine end temp 1620-1650℃；
4) carry out during rh vacuum refining forcing carbonization treatment, add aluminum shot to carry out deoxidation；At the end of rh control carbon content≤ 0.002wt%, terminal silicone content≤0.01wt%, terminal manganese content≤0.05wt%, end phosphorus content≤0.008wt%, eventually Point sulfur content≤0.005wt%；Total oxygen content≤0.0050wt% at the end of rh, rh terminate nitrogen content≤0.003wt%, and rh ties Bundle aluminium content≤0.010wt%.
5) continuous casting working procedure is poured into a mould using full guard conticaster, and mold liquid level automatically controls, using ingot iron class Steel grade special crystallizer covering slag.Molten steel overheat controls at 20-30 DEG C, and big bag uses integral water gap, and middle bag uses all risk insurance Shield cast submersed nozzle.Using carbon-free ladle and the special molten steel covering agent of ingot iron class steel grade.
It is an advantage of the current invention that by the production technology of this invention, i.e. kr desulfurizing iron pretreatment, converter smelting, lf Refine, rh vacuum refining and the cast of continuous casting full guard, are changed using the special desulfurizing agent of ingot iron class steel grade, ladle top slag simultaneously Matter agent, crystallizer mould flux, coverture and carbon-free ladle.Smelt the amorphous soft magnetic material ingot iron produced to produce Product disclosure satisfy that the technical requirement of high-end user processing amorphous state and ultracrystallite magnetic material:
(1) c≤0.0020wt%, si≤0.01wt%, mn≤0.03wt%, p≤0.007wt%, s≤0.002wt%；
(2) [o]≤0.0050wt%, [n]≤0.0030wt%, al≤0.010wt%；
(3) b class, d class and ds type impurity size≤10 μm；
(4) residual elements ni+cr+cu+pb+sn+≤0.015wt%.
Specific embodiment
The present invention can in the case that steel plant possess machine condition production development amorphous soft magnetic material ingot iron Apply during product.
Using the present invention production technology, in certain Large Steel ironworks, carry out amorphous soft magnetic material ingot iron and produce The Development and Production of product, that is, after kr desulfurization process, enters molten steel sulfur content≤0.002% of converter.Converter smelting and rh vacuum Refine combines, and realizes the control of the extremely low composition of amorphous soft magnetic material ingot iron, effectively improves the cleanliness factor of molten steel, steel Middle residual element content reaches extremely low level, and entire oxygen content in the steel content controls to below 100ppm.Product quality disclosure satisfy that height End subscriber processing amorphous state and the technical requirement of ultracrystallite magnetic material
Kr desulfurization pretreatment, converter smelting, lf refine, rh vacuum refining and the continuous casting full guard pouring technology taken control Measure is:
A.kr desulfurizing iron pretreatment, at 1300-1450 DEG C, sulfur content controls to below 0.002wt% molten iron temperature.
B. converter terminal temperature control is at 1650-1750 DEG C, endpoint carbon content≤0.04wt%, and terminal silicone content≤ 0.01wt%, terminal manganese content≤0.10wt%, end phosphorus content≤0.010wt%, final sulfur content≤0.005wt%.Adopt Take double slag melting techniques, carry out bottom blowing process control simultaneously, add high aluminium content slag material, carry out ladle top slag modifying process.
C.lf refine carries out submerged arc slag making hyperthermic treatment, and refining cycle is pressed 20-35min and controlled, lf refine end temp 1620-1650℃；
D.rh vacuum refining carries out forcing carbonization treatment, and rh terminates carbon content≤0.002wt%, and terminal silicone content≤ 0.01wt%, terminal manganese content≤0.04wt%, end phosphorus content≤0.008wt%, final sulfur content≤0.005wt%.rh Vacuum decarburization process add aluminum shot carry out deoxidation, rh terminates total oxygen content≤0.0050wt%, rh terminate nitrogen content≤ 0.003wt%, rh terminate aluminium content≤0.010wt%.
E. continuous casting working procedure, full guard conticaster is poured into a mould, and mold liquid level automatically controls, using ingot iron class steel grade Special crystallizer covering slag.Molten steel overheat controls at 20-30 DEG C, and big bag uses integral water gap, and middle bag is poured using full guard Note submersed nozzle.Using carbon-free ladle and the special molten steel covering agent of ingot iron class steel grade.
The finished product composition (wt%) of table 1 amorphous magnetic material ingot iron.
Table 1

Claims (3)

1. a kind of production method of amorphous soft magnetic material ingot iron is it is characterised in that concrete steps and parameter are as follows:
1), when carrying out kr desulfurizing iron pretreating process, sulfur content controls to≤0.002wt%；
2), during converter smelting, take double slag melting techniques, carry out bottom blowing process control simultaneously, add slag material；Control terminal temperature Spend at 1650-1750 DEG C, endpoint carbon content≤0.04wt%, terminal silicone content≤0.01wt%, terminal manganese content≤ 0.10wt%, end phosphorus content≤0.010wt%, final sulfur content≤0.005wt%；
3) carry out submerged arc slag making hyperthermic treatment during lf refine, refining cycle is pressed 20-35min and controlled, lf refine end temp 1620- 1650℃；
4) carry out during rh vacuum refining forcing carbonization treatment, add aluminum shot to carry out deoxidation；At the end of rh control carbon content≤ 0.002wt%, terminal silicone content≤0.01wt%, terminal manganese content≤0.05wt%, end phosphorus content≤0.008wt%, eventually Point sulfur content≤0.005wt%；Total oxygen content≤0.0050wt% at the end of rh, rh terminate nitrogen content≤0.003wt%, and rh ties Bundle aluminium content≤0.010wt%；
5) continuous casting working procedure is poured into a mould using full guard conticaster, and mold liquid level automatically controls, using ingot iron class steel grade Special crystallizer covering slag；Molten steel overheat controls at 20-30 DEG C.
2. method according to claim 1 is it is characterised in that described step 5) continuous casting working procedure when, big bag is using overall The formula mouth of a river, middle bag uses full guard to pour into a mould submersed nozzle.
3. method according to claim 1 is it is characterised in that described step 5) continuous casting working procedure when, using carbon-free ladle The special molten steel covering agent with ingot iron class steel grade.
CN201610874749.8A 2016-09-30 2016-09-30 Production method of armco iron for amorphous soft magnetic materials Pending CN106350631A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108277316A (en) * 2017-01-05 2018-07-13 鞍钢股份有限公司 Production method of pure iron
CN108456762A (en) * 2018-02-28 2018-08-28 江苏省沙钢钢铁研究院有限公司 Method for controlling Ds type inclusions in alloy tool steel
CN108559905A (en) * 2018-03-09 2018-09-21 邢台钢铁有限责任公司 High amorphized silicon pure iron as raw material and its production method
CN109797266A (en) * 2019-01-14 2019-05-24 包头钢铁（集团）有限责任公司 A kind of production method producing ingot iron using the high ferrous manganese ore of high phosphorus as raw material
CN110629118A (en) * 2019-10-29 2019-12-31 成都先进金属材料产业技术研究院有限公司 Medium-low carbon industrial ultra-pure iron and production method thereof
CN110747395A (en) * 2019-10-29 2020-02-04 成都先进金属材料产业技术研究院有限公司 Industrial ultra-pure iron and production method thereof
CN113106321A (en) * 2021-03-16 2021-07-13 首钢集团有限公司 Production method of novel silicon-containing ultra-low carbon steel
CN113512619A (en) * 2021-06-30 2021-10-19 湖南华菱湘潭钢铁有限公司 Production method of industrial pure iron
CN113774277A (en) * 2021-08-16 2021-12-10 武汉钢铁有限公司 Ultra-low carbon and ultra-low manganese industrial pure iron and preparation method thereof
CN114908281A (en) * 2022-04-19 2022-08-16 包头钢铁（集团）有限责任公司 Production method of low-sulfur low-oxygen high-purity industrial pure iron
CN115433868A (en) * 2022-09-15 2022-12-06 山西太钢不锈钢股份有限公司 Ultra-pure Fe-Si intermediate alloy for amorphous industry and manufacturing method thereof
CN115927956A (en) * 2022-11-09 2023-04-07 抚顺特殊钢股份有限公司 High-purity industrial ultra-pure iron and production method thereof

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108277316B (en) * 2017-01-05 2020-01-07 鞍钢股份有限公司 Production method of pure iron
CN108277316A (en) * 2017-01-05 2018-07-13 鞍钢股份有限公司 Production method of pure iron
CN108456762A (en) * 2018-02-28 2018-08-28 江苏省沙钢钢铁研究院有限公司 Method for controlling Ds type inclusions in alloy tool steel
CN108559905A (en) * 2018-03-09 2018-09-21 邢台钢铁有限责任公司 High amorphized silicon pure iron as raw material and its production method
CN109797266A (en) * 2019-01-14 2019-05-24 包头钢铁（集团）有限责任公司 A kind of production method producing ingot iron using the high ferrous manganese ore of high phosphorus as raw material
CN110747395A (en) * 2019-10-29 2020-02-04 成都先进金属材料产业技术研究院有限公司 Industrial ultra-pure iron and production method thereof
CN110629118A (en) * 2019-10-29 2019-12-31 成都先进金属材料产业技术研究院有限公司 Medium-low carbon industrial ultra-pure iron and production method thereof
CN113106321A (en) * 2021-03-16 2021-07-13 首钢集团有限公司 Production method of novel silicon-containing ultra-low carbon steel
CN113512619A (en) * 2021-06-30 2021-10-19 湖南华菱湘潭钢铁有限公司 Production method of industrial pure iron
CN113512619B (en) * 2021-06-30 2022-06-28 湖南华菱湘潭钢铁有限公司 Production method of industrial pure iron
CN113774277A (en) * 2021-08-16 2021-12-10 武汉钢铁有限公司 Ultra-low carbon and ultra-low manganese industrial pure iron and preparation method thereof
CN114908281A (en) * 2022-04-19 2022-08-16 包头钢铁（集团）有限责任公司 Production method of low-sulfur low-oxygen high-purity industrial pure iron
CN114908281B (en) * 2022-04-19 2023-08-25 包头钢铁（集团）有限责任公司 Production method of low-sulfur low-oxygen high-purity industrial pure iron
CN115433868A (en) * 2022-09-15 2022-12-06 山西太钢不锈钢股份有限公司 Ultra-pure Fe-Si intermediate alloy for amorphous industry and manufacturing method thereof
CN115927956A (en) * 2022-11-09 2023-04-07 抚顺特殊钢股份有限公司 High-purity industrial ultra-pure iron and production method thereof

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Application publication date: 20170125