CN110484807A - The method of rare-earth element cerium is added in cast steel fusion process - Google Patents
The method of rare-earth element cerium is added in cast steel fusion process Download PDFInfo
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- CN110484807A CN110484807A CN201910794106.6A CN201910794106A CN110484807A CN 110484807 A CN110484807 A CN 110484807A CN 201910794106 A CN201910794106 A CN 201910794106A CN 110484807 A CN110484807 A CN 110484807A
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- 238000007499 fusion processing Methods 0.000 title claims abstract description 42
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 20
- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 18
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 title claims abstract 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- 229910000640 Fe alloy Inorganic materials 0.000 claims abstract description 43
- GSVIBLVMWGSPRZ-UHFFFAOYSA-N cerium iron Chemical compound [Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Fe].[Ce].[Ce] GSVIBLVMWGSPRZ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000005266 casting Methods 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000010079 rubber tapping Methods 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 6
- 238000005261 decarburization Methods 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 229910001017 Alperm Inorganic materials 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims 1
- 238000004886 process control Methods 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 5
- 229910001268 Ferrocerium Inorganic materials 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 7
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- -1 rare-earth sulfide Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention belongs to casting technology fields, in particular to the method for rare-earth element cerium is added in a kind of cast steel fusion process, smelting process is EAF furnace+LF furnace+casting, specific steps include: the control of EAF furnace fusion process, the control of LF furnace fusion process, Pouring control, wherein in the control of LF furnace fusion process, if temperature value is 1575 DEG C~1600 DEG C, oxygen activity is less than 5ppm, it is initially added into cerium-iron alloy, it is added in batches, the additional amount of every batch of cerium-iron alloy is 10kg~15kg, and the additional amount of cerium-iron alloy is controlled in 2~3kg/t steel；After cerium-iron alloy is added, steel tapping casting.The method of rare-earth element cerium is added in cast steel fusion process provided by the invention, guarantee the rate of recovery of ferrocerium and sufficiently the field trash in steel can be denaturalized, make the rate of recovery of Ce elements can reach 60% or so, and the low-temperature impact toughness of steel-casting significantly improves, that is, improves the mechanical property of steel-casting.
Description
Technical field
The invention belongs to casting technology field, in particular to the side of rare-earth element cerium is added in a kind of cast steel fusion process
Method.
Background technique
Non-metallic inclusion in steel is broadly divided into three classes: sulfide, oxide, nitride, sulphide inculsion are mainly
Refer to that manganese sulfide, iron sulfide are mingled with, this type impurity melting is low, is highly soluble in steel, and in long strip, is difficult in steelmaking process
Get rid of, be the main source of non-metallic inclusion in steel-casting, and it is sulfide-based be mingled with easily be dissolved into steel, can reduce
The corrosion resistance of steel-casting especially reduces resistance to spot corrosion and slit and corrosion resistant performance, while sulfide can reduce the modeling of steel-casting in steel
Property, toughness and anti-fatigue performance.Rare earth element, which is added in molten steel, generates spherical rare-earth sulfide or oxysulfide, replaces and is easy shape
At strip manganese sulfide inclusion, be that oxide morphology is controlled, improve the thermoplasticity of steel, especially transverse impact toughness.
But rare earth addition is improper, will form rare earth oxide, this oxide extremely difficult floating in steel will increase being mingled in steel,
The intermetallic compound that brittle rare earth and iron can even be generated, reduces the performance of steel-casting.
Summary of the invention
In view of the above technical problems, it is necessary to a kind of method for proposing that rare-earth element cerium is added in cast steel fusion process.
A kind of method that rare-earth element cerium is added in cast steel fusion process, smeltings process are EAF furnace+LF furnace+casting, specifically
The following steps are included:
The control of EAF furnace fusion process: being added scrap iron in EAF and returns to material, and the scrap iron and the weight ratio for returning to material are
5:5；And 1%~1.5% carburant that molten steel total amount is added is melted, and melting down sample is taken to analyze after temperature reaches 1530 DEG C
Chemical component carries out oxygen decarburization after being continuously heating to 1590 DEG C~1620 DEG C if chemical component meets standard requirements；Oxygen blast
After, the aluminum shot of alfer and 1~2kg/t steel that 3~5kg/t steel is added is restored, and reaches 1640 to molten steel temperature
DEG C~1660 DEG C after tapping to LF furnace；
The control of LF furnace fusion process: after molten steel reaches LF furnace, adjusting steel slag, restore molten steel, after keeping 3~5min, measurement
The oxygen activity of molten steel, after oxygen activity is less than 5ppm, and molten steel heating, to 1590 DEG C~1610 DEG C progress desulfurization, the content of sulphur is less than
The content of sampling and measuring each element after 0.08% is added alloy according to measurement result and adjusts chemical component to meeting standard requirements；
Temperature and oxygen activity are measured, if temperature value is 1575 DEG C~1600 DEG C, oxygen activity is less than 5ppm, is initially added into cerium-iron alloy, point
Batch is added, and the additional amount of every batch of cerium-iron alloy is 10kg~15kg, and the additional amount of cerium-iron alloy is controlled in 2~3kg/t steel；
After cerium-iron alloy is added, steel tapping casting.
Pouring control: distance of the slide gate nozzle apart from sprue cup is less than 150mm when casting.
Further, in above-mentioned " control of EAF furnace fusion process " step, by fire door toward having a down dip during oxygen decarburization
Oblique 10 °~15 °；
Further, it in above-mentioned " control of LF furnace fusion process " step, during adjusting steel slag, is added in molten steel
1%~1.5% active lime of molten steel total amount and the fluorite of 30kg~50kg.
Further, it in above-mentioned " control of LF furnace fusion process " step, during restoring molten steel, is added in molten steel
The aluminum shot of 1~1.5kg/t steel and the kalzium metal ball of 2~3kg/t steel.
Further, it in above-mentioned " control of LF furnace fusion process " step, before cerium-iron alloy is added, is added in molten steel
The fluorite of 1kg/t steel, and argon pressure is adjusted to 0.2Mpa~0.3Mpa.
Further, in above-mentioned " control of LF furnace fusion process " step, after cerium-iron alloy is added, first by argon gas
Pressure is adjusted to 0.05Mpa~0.1Mpa, keeps 10min~15min, reaches 1580 DEG C~1590 DEG C to temperature, then tap
Casting.
Further, in above-mentioned " Pouring control " step, the time control that LF furnace is tapped to casting complete exists
Within 20min.
Further, the cerium-iron alloy involved in above-mentioned all steps is 20% cerium-iron alloy.
Inclusion analysis discovery, field trash grade are carried out by sampling before and after cerium-iron alloy is added in cast steel fusion process
Respectively by before being added be slightly 1.5 grades, be carefully 1.5 grades, to be reduced to slightly be 1 grade, is carefully 1 grade, illustrate the addition by cerium-iron alloy,
A large amount of lath-shaped sulphide inculsion obtains spherical re inclusion by denaturation and floats to molten steel surface.Molten steel is analyzed simultaneously
In the harmful residual elements such as O, H, S, Pb, Sn, discovery decline in various degree illustrates rare earth Ce elements to having in cast steel
Evil member is known as certain inhibiting effect.
Since the Ce elements in rare earth element can be denaturalized Inclusion, steel slag table is floated to conducive to it
Face；The method that rare-earth element cerium is added in cast steel fusion process provided by the invention carries out addition cerium-iron alloy in the refining later period,
Guarantee the rate of recovery of ferrocerium and sufficiently the field trash in steel can be denaturalized, the rate of recovery of Ce elements is made to can reach 60% left side
The right side, and the low-temperature impact toughness of steel-casting significantly improves, that is, improves the mechanical property of steel-casting.
Specific embodiment
Technical solution of the present invention is further described in detail with reference to embodiments.
In the present invention unless specifically defined or limited otherwise, term shall be understood in a broad sense, for the common of this field
For technical staff, the concrete meaning of term in the present invention can be understood as the case may be.
A kind of method that rare-earth element cerium is added in cast steel fusion process, smeltings process are EAF furnace+LF furnace+casting, specifically
The following steps are included:
The control of EAF furnace fusion process: being added scrap iron in EAF and returns to material, and the scrap iron and the weight ratio for returning to material are
5:5；And 1%~1.5% carburant that molten steel total amount is added is melted, and melting down sample is taken to analyze after temperature reaches 1530 DEG C
Chemical component carries out oxygen decarburization after being continuously heating to 1590 DEG C~1620 DEG C if chemical component meets standard requirements；Oxygen blast
After, the aluminum shot of alfer and 1~2kg/t steel that 3~5kg/t steel is added is restored, and reaches 1640 to molten steel temperature
DEG C~1660 DEG C after tapping to LF furnace.
Specifically, in above-mentioned " control of EAF furnace fusion process " step, fire door is tilted down during oxygen decarburization
10 °~15 °, so that the oxidizing slag in furnace is flowed out from fire door, and after oxygen blast, guarantee that the oxidation quantity of slag in furnace is less than its total amount
5%, the rate of recovery after subsequent cerium-iron alloy is added can be improved in this way.
The control of LF furnace fusion process: after molten steel reaches LF furnace, adjusting steel slag, restore molten steel, after keeping 3~5min, measurement
The oxygen activity of molten steel, after oxygen activity is less than 5ppm, and molten steel heating, to 1590 DEG C~1610 DEG C progress desulfurization, the content of sulphur is less than
The content of sampling and measuring each element after 0.08% is added alloy according to measurement result and adjusts chemical component to meeting standard requirements；
Temperature and oxygen activity are measured, if temperature value is 1575 DEG C~1600 DEG C, oxygen activity is less than 5ppm, is initially added into cerium-iron alloy, point
Batch is added, and the additional amount of every batch of cerium-iron alloy is 10kg~15kg, and the additional amount of cerium-iron alloy is controlled in 2~3kg/t steel；
After cerium-iron alloy is added, steel tapping casting.
It should be noted that be added in batches when cerium-iron alloy is added, the additional amount of every batch of cerium-iron alloy be 10kg~
15kg prevents an additional amount excessive, and cerium-iron alloy is accumulated blocking on molten steel surface.And the additional amount of cerium-iron alloy is controlled 2
~3kg/t steel does not have denaturation if the additional amount of cerium-iron alloy is very few；If the additional amount of cerium-iron alloy is excessive, extra
Ferrocerium will form CeO field trash, is difficult to float in molten steel, influences casting quality.
Specifically, in above-mentioned " control of LF furnace fusion process " step, during adjusting steel slag, steel is added in molten steel
1%~1.5% active lime of water inventory and the fluorite of 30kg~50kg.
Specifically, in above-mentioned " control of LF furnace fusion process " step, during restoring molten steel, 1 is added in molten steel
The aluminum shot of~1.5kg/t steel and the kalzium metal ball of 2~3kg/t steel.
Specifically, in above-mentioned " control of LF furnace fusion process " step, before cerium-iron alloy is added, 1kg/ is added in molten steel
The fluorite of t steel makes it have good mobility to adjust steel slag, and argon pressure is adjusted to 0.2Mpa~0.3Mpa, allows
Molten steel is exposed in air, and cerium-iron alloy is added later, and such cerium-iron alloy, which is added in ladle, to be directly entered in molten steel,
It avoids being oxidized after contacting with steel slag.
Specifically, in above-mentioned " control of LF furnace fusion process " step, after cerium-iron alloy is added, first by Ar Pressure
Power is adjusted to 0.05Mpa~0.1Mpa, and molten steel is made to be in soft blow state, keeps 10min~15min, allows Ce elements in steel
Field trash is denaturalized, while can prevent molten steel from contacting with air, and Ce elements are oxidized, and further increases the recycling of Ce elements
Rate reaches 1580 DEG C~1590 DEG C to temperature, then steel tapping casting.
Pouring control: distance of the slide gate nozzle apart from sprue cup is less than 150mm when casting.
Specifically, in above-mentioned " Pouring control " step, the time that LF furnace is tapped to casting complete is controlled in 20min
Within.
It should be noted that casting process is the process of a secondary oxidation, there is certain shadow to the rate of recovery of Ce elements
Distance of the slide gate nozzle apart from sprue cup should be less than 150mm when ringing, therefore being poured, and refining furnace tapping to casting complete when
Between should control within 20min, the rate of recovery of the Ce elements in cast steel can be improved in this way.
Specifically, the cerium-iron alloy involved in above-mentioned all steps is 20% cerium-iron alloy.
Using method of the invention when smelting ZG06Cr13Ni4Mo water power stainless steel, smelting molten steel tonnage is 56t, In
After LF furnace later period alloy adjusts, 160kg cerium-iron alloy is added after reaching requirement in temperature, oxygen activity, adjusts argon gas, 12min
Steel tapping casting afterwards, to adding foreign substance in molten steel grade before and after cerium-iron alloy to be compared, wherein plus field trash grade of supporting the front is thick
It is 1.5 grades, is carefully 1.5 grades, it is carefully 1.5 grades that rear field trash grade, which becomes slightly being 1 grade, in addition, and field trash grade is improved,
It is meanwhile for statistical analysis to mechanical castings after furnace, it is found that add low-temperature impact after rare-earth element cerium to improve 10%, break
Face shrinking percentage promotes 5%, and tensile strength and plastic elongation Strength Changes are little.For ZG1Cr10MoVNbN heat resisting steel material,
Cerium-iron alloy is added in ASTM A216WCC cryogenic steel to smelt, field trash grade, mechanical property also get a promotion.
The steps in the embodiment of the present invention can be adjusted according to actual needs, merges and delete.
The foregoing is only a preferred embodiment of the present invention, is not limited to invent, although referring to aforementioned implementation
Invention is explained in detail for example, for those skilled in the art, still can be to foregoing embodiments
Documented technical solution is modified or equivalent replacement of some of the technical features, all in spirit of the invention
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. the method for rare-earth element cerium is added in a kind of cast steel fusion process, which comprises the following steps:
The control of EAF furnace fusion process: being added scrap iron in EAF and returns to material, and the scrap iron and the weight ratio for returning to material are 5:5；
And 1%~1.5% carburant that molten steel total amount is added is melted, and melting down sample analytical chemistry is taken after temperature reaches 1530 DEG C
Ingredient carries out oxygen decarburization after being continuously heating to 1590 DEG C~1620 DEG C if chemical component meets standard requirements；Oxygen blast terminates
Afterwards, the alfer of 3~5kg/t steel is added and the aluminum shot of 1~2kg/t steel is restored, to molten steel temperature reach 1640 DEG C~
It taps after 1660 DEG C to LF furnace；
The control of LF furnace fusion process: after molten steel reaches LF furnace, adjusting steel slag, restore molten steel, after keeping 3~5min, measures molten steel
Oxygen activity, after oxygen activity is less than 5ppm, and molten steel heating, to 1590 DEG C~1610 DEG C progress desulfurization, the content of sulphur is less than
The content of sampling and measuring each element after 0.08% is added alloy according to measurement result and adjusts chemical component to meeting standard requirements；
Temperature and oxygen activity are measured, if temperature value is 1575 DEG C~1600 DEG C, oxygen activity is less than 5ppm, is initially added into cerium-iron alloy, point
Batch is added, and the additional amount of every batch of cerium-iron alloy is 10kg~15kg, and the additional amount of cerium-iron alloy is controlled in 2~3kg/t steel；
After cerium-iron alloy is added, steel tapping casting；
Pouring control: distance of the slide gate nozzle apart from sprue cup is less than 150mm when casting.
2. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that in " EAF
In furnace fusion process control " step, fire door is tilted to 10 °~15 ° down during oxygen decarburization.
3. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that in " LF
In furnace fusion process control " step, during adjusting steel slag, 1%~1.5% activity of molten steel total amount is added in molten steel
The fluorite of lime and 30kg~50kg.
4. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that in " LF
Furnace fusion process control " is in step, during restoring molten steel, be added in molten steel 1~1.5kg/t steel aluminum shot and 2~
The kalzium metal ball of 3kg/t steel.
5. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that in " LF
Furnace fusion process control " is in step, before cerium-iron alloy is added, is added the fluorite of 1kg/t steel in molten steel, and by argon pressure tune
Whole is 0.2Mpa~0.3Mpa.
6. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that in " LF
In furnace fusion process control " step, after cerium-iron alloy is added, argon pressure is adjusted to 0.05Mpa~0.1Mpa first,
10min~15min is kept, reaches 1580 DEG C~1590 DEG C to temperature, then steel tapping casting.
7. the method for rare-earth element cerium is added in cast steel fusion process according to claim 1, which is characterized in that " pouring
In note process control " step, the time that LF furnace is tapped to casting complete is controlled within 20min.
8. the method for rare-earth element cerium according to claim 1, is added in cast steel fusion process described in 5 or 6, which is characterized in that
The cerium-iron alloy is 20% cerium-iron alloy.
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| CN104152782A (en) * | 2014-07-28 | 2014-11-19 | 宁国市开源电力耐磨材料有限公司 | Process method for casting corrosion-resistant heat-resistant steel by induction furnace |
| CN107475481A (en) * | 2017-07-03 | 2017-12-15 | 共享铸钢有限公司 | Control the steel-casting smelting process of Nb contents |
| CN107841691A (en) * | 2017-10-25 | 2018-03-27 | 河北工业大学 | A kind of 750MPa grade super strengths Fe Mn Al C systems lightweight cast steel and preparation method thereof |
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