CN107475484A - Al reduction during aluminum casting killed cold heading steel2O3Erosion method of-C stopper rod - Google Patents
Al reduction during aluminum casting killed cold heading steel2O3Erosion method of-C stopper rod Download PDFInfo
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- CN107475484A CN107475484A CN201710633045.6A CN201710633045A CN107475484A CN 107475484 A CN107475484 A CN 107475484A CN 201710633045 A CN201710633045 A CN 201710633045A CN 107475484 A CN107475484 A CN 107475484A
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- molten steel
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- killed
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005266 casting Methods 0.000 title claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 12
- 230000009467 reduction Effects 0.000 title description 3
- 239000010959 steel Substances 0.000 claims abstract description 94
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 238000007670 refining Methods 0.000 claims abstract description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 12
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 12
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- 239000011575 calcium Substances 0.000 claims description 30
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 28
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 18
- 229910052791 calcium Inorganic materials 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 229910052786 argon Inorganic materials 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000686 essence Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 10
- 238000010079 rubber tapping Methods 0.000 abstract description 6
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 238000009749 continuous casting Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000010273 cold forging Methods 0.000 description 3
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
-
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The application discloses reducing Al during pouring of aluminum killed cold heading steel2O3Method of erosion of-C stopper rod using Al2O3Mass C solid stopper to control the molten steel flow rate during casting, including LF refiningPouring with a tundish, controlling Al in the molten steel when LF refining tapping]0.030 percent to 0.055 percent,is (3.6 to 12.8) × 10‑6And satisfies the following conditions: al (Al)2O3Al in C-mass monolithic stopper2O3The mass percentage content is not less than 50 percent, and SiO2ZrO not higher than 15% by mass2The mass percentage content is not lower than 5%. The invention selects proper [ Al ] in molten steel]、[Ca]The range of the method, the optimization of LF refining and pouring process of the tundish and other means, on one hand, the full modification of the impurities such as alumina in the molten steel is ensured, and on the other hand, the serious erosion of the stopper rod is avoided. Compared with the prior art, the process method improves the cleanliness and the castability of the molten steel, effectively controls the problem of liquid level fluctuation in the casting process, and obviously improves the number of continuous casting furnaces and the quality of casting blanks.
Description
Technical field
The application is related to molten steel furnace external refining and direct casting field, when pouring into a mould aluminium-killed-cold-heading steel more particularly to one kind
Reduce Al2O3The method that-C matter stopper corrodes.
Background technology
Good slab quality requires efficient casting process, and efficient casting process will aspire for stability lasting casting,
And stopper is to realize one of crucial refractory material of high reliability continuous casting, the use of stopper directly affects the castability of molten steel.
In actual production, the erosion of stopper or dross problem cause crystallizer liquid level fluctuation of molten steel big, are forced to close the influence such as stream, reduce
The casting sequence of molten steel, it is unfavorable for improving Cleanliness of Molten Steel and normal tissue produces, add production cost.
In the actual production practice of aluminium-killed-cold-heading steel, Al2O3It is serious that stopper head erosion occurs in-C matter integral column of sagger
Phenomenon.Serious stopper corrodes the phenomenon for causing and frequently occurring the reduction of stopper aperture, and site operation personnel is often uncontrollable
Crystallizer liquid steel level and be forced close stream.In STEELMAKING PRODUCTION workshop, stopper corrodes turns into casting sequence reduction, ton steel cost increases
Add one of important factor in order difficult with organization of production.
The content of the invention
Al is reduced when pouring into a mould aluminium-killed-cold-heading steel it is an object of the invention to provide one kind2O3The method that-C matter stopper corrodes,
Solves the problems, such as Eroded present in aluminium-killed-cold-heading steel production process with this.
To achieve the above object, the present invention provides following technical scheme：
The embodiment of the present application reduces Al when disclosing a kind of cast aluminium-killed-cold-heading steel2O3The method that-C matter stopper corrodes, use
Al2O3- C matter integral column of sagger is to control molten steel flow velocity in casting process, and cast aluminium-killed-cold-heading steel includes LF refining and tundish pours
Note, when LF refining is tapped, it is 0.030%~0.055% to control [Al] in molten steel,For (3.6~12.8)
×10-6, and meet：Al2O3Al in-C matter integral column of sagger2O3Weight/mass percentage composition is not less than 50%, SiO2Weight/mass percentage composition
Not higher than 15%, ZrO2Weight/mass percentage composition is not less than 5%.
Preferably, Al is reduced in above-mentioned cast aluminium-killed-cold-heading steel2O3In the method that-C matter stopper corrodes, the LF
Refining includes white slag refining, argon bottom-blowing, feeds aluminum steel and feeds calcium line.
Preferably, Al is reduced in above-mentioned cast aluminium-killed-cold-heading steel2O3It is described to feed in the method that-C matter stopper corrodes
The power of agitator of argon gas is 40~65W/t before calcium line, and soft mixing time is not less than 5min after feeding calcium line.
Preferably, Al is reduced in above-mentioned cast aluminium-killed-cold-heading steel2O3In the method that-C matter stopper corrodes, LF refining
During tapping, [S] is not higher than 0.0085% in molten steel.
Preferably, Al is reduced in above-mentioned cast aluminium-killed-cold-heading steel2O3In the method that-C matter stopper corrodes, in described
Between bag be cast for full guard cast.
Preferably, Al is reduced in above-mentioned cast aluminium-killed-cold-heading steel2O3In the method that-C matter stopper corrodes, tundish
In casting process, the degree of superheat is 20~35 DEG C.
Al is reduced during a kind of cast aluminium-killed-cold-heading steel that the present invention designs2O3The process that-C matter stopper corrodes, passes through
[Al], the scope of [Ca], the optimization means such as LF refining and basket pouring process are selected in suitable molten steel, on the one hand ensure that
The field trashes such as the aluminum oxide in molten steel are fully modified, and are on the other hand avoided serious stopper and are corroded, specific effect is such as
Under：
(1) it is 0.020%~0.045% by specification [Al],For (3.6~12.8) × 10-6, one
Aspect can ensure the effect of aluminium deoxidation, on the other hand useTo replace the w of existing simple linear [Ca]%/
w[Al]%To calculate [Ca] that is needed in steel, it is ensured that while the alumina inclusion in molten steel is fully denatured, obtain
One more rational [Ca], avoid [Ca] excessive phenomenon.
(2) by adjusting argon bottom-blowing system, aluminum steel feed quantity, the excessive situation of aluminum steel feeding, aluminum steel consumption are avoided
Significantly reduce, improve the cleanliness factor of molten steel, reduce ton steel cost.
(3) castability of molten steel is significantly improved, and casting sequence significantly rises, and liquid fluctuating is effectively improved,
Slab quality improves.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is shown in the specific embodiment of the invention as generation 12CaO7Al2O3、3CaO·Al2O3[Ca]-[Al]
Balance chart and [Al] of the embodiment of the present invention, the distribution of [Ca]；
Fig. 2 show cast in the prior art and terminates stopper head microscopic appearance；
Fig. 3 show cast in the specific embodiment of the invention 1 and terminates rear stopper head microscopic appearance；
Fig. 4 show cast in the specific embodiment of the invention 2 and terminates rear stopper head microscopic appearance；
Fig. 5 show cast in the specific embodiment of the invention 3 and terminates rear stopper head microscopic appearance
Embodiment
With reference to shown in Fig. 1, Al is reduced when pouring into a mould aluminium-killed-cold-heading steel present embodiment discloses one kind2O3- C matter stopper corrodes
Method, using Al2O3For-C matter integral column of sagger to control molten steel flow velocity in casting process, cast aluminium-killed-cold-heading steel includes LF essences
Refining and basket pouring, when LF refining is tapped, it is 0.030%~0.055% to control [Al] in molten steel,
For (3.6~12.8) × 10-6, and meet：Al2O3Al in-C matter integral column of sagger2O3Weight/mass percentage composition is not less than 50%,
SiO2Weight/mass percentage composition is not higher than 15%, ZrO2Weight/mass percentage composition is not less than 5%.
The molten steel of converter tapping starts to refine into LF refining station, is refined by white slag, argon bottom-blowing, hello aluminum steel, hello calcium
The processing steps such as line are acted on completing desulfurization task, regulation molten steel [Al] and [Ca], adjusting temperature and inclusion removal etc..
In one embodiment, the power of agitator of argon gas is 40~65W/t before hello calcium line, and soft mixing time is not low after feeding calcium line
In 5min.
Preferably, when LF refining is tapped, [S] is not higher than 0.0085% in molten steel.
Further, the basket pouring is poured into a mould for full guard.During basket pouring, the degree of superheat is 20~35
℃。
For compared with the prior art, this case be a kind of technique is simple, improvement is obvious, cast aluminium-killed-cold-heading steel when energy
Enough improve molten steel castability, casting sequence and the process for reducing external refining and the direct casting of smelting cost.
The present invention is described further by the following example：According to following embodiments, the present invention may be better understood.
However, as it will be easily appreciated by one skilled in the art that specific material ratio, process conditions and its result described by embodiment are only used
In the explanation present invention, without should be also without limitation on the present invention described in detail in claims.
Fig. 2 is cast end stopper head microscopic appearance under the conditions of prior art processes, and conversion zone is etched to be formed largely
Loose, hole.
Embodiment 1
It is to be illustrated exemplified by cold-forging steel steel grade is SWRCH22AB now to choose steel grade.
The molten steel of SWRCH22AB converter tappings starts to refine into LF refining station, is made by adding the slag charges such as lime, calcium carbide
White slag, the alloys such as ferromanganese are added, adjust argon bottom-blowing flow, feed the processing step such as aluminum steel, feeding calcium line to complete desulfurization, regulation
Molten steel [Al] and [Ca], the regulation refining task such as temperature and inclusion removal, when LF refining is tapped, [Al] in molten steel is
0.030%,For 4.5 × 10-6, poured into a mould using full guard during basket pouring, using Al2O3- C matter is overall
Stopper is to control molten steel flow velocity in casting process.Al used by tundish molding casting process2O3In-C matter integral column of sagger
Al2O3Weight/mass percentage composition is 58%, SiO2Weight/mass percentage composition is 8.8%, ZrO2Weight/mass percentage composition is 5.8%.LF refining
During, the power of agitator of argon gas is 45W/t before hello calcium line, feeds soft mixing time 10min after calcium line；In the outbound molten steel of LF [S]
For 0.0030%.For aluminium-killed-cold-heading steel during basket pouring, target superheat degree is 30 DEG C.
Cast terminates rear stopper head microscopic appearance as shown in figure 3, conversion zone still keeps fine and close.
Embodiment 2
It is to be illustrated exemplified by cold-forging steel steel grade is SWRCH22AB now to choose steel grade.
The molten steel of SWRCH22AB converter tappings starts to refine into LF refining station, is made by adding the slag charges such as lime, calcium carbide
White slag, the alloys such as ferromanganese are added, adjust argon bottom-blowing flow, feed the processing step such as aluminum steel, feeding calcium line to complete desulfurization, regulation
Molten steel [Al] and [Ca], the regulation refining task such as temperature and inclusion removal, when LF refining is tapped, [Al] in molten steel is
0.039%,For 7.8 × 10-6, poured into a mould using full guard during basket pouring, using Al2O3- C matter is integrally filled in
Rod is to control molten steel flow velocity in casting process.Al used by tundish molding casting process2O3In-C matter integral column of sagger
Al2O3Weight/mass percentage composition is 60%, SiO2Weight/mass percentage composition is 11.5%, ZrO2Weight/mass percentage composition is 6.3%.LF essences
During refining, the power of agitator of argon gas is 53W/t before hello calcium line, feeds soft mixing time 10min after calcium line；In the outbound molten steel of LF
[S] is 0.0048%.For aluminium-killed-cold-heading steel during basket pouring, target superheat degree is 30 DEG C.
Cast terminates rear stopper head microscopic appearance as shown in figure 4, conversion zone still keeps fine and close.
Embodiment 3
It is to be illustrated exemplified by cold-forging steel steel grade is SWRCH22AB now to choose steel grade.
The molten steel of SWRCH22AB converter tappings starts to refine into LF refining station, is made by adding the slag charges such as lime, calcium carbide
White slag, the alloys such as ferromanganese are added, adjust argon bottom-blowing flow, feed the processing step such as aluminum steel, feeding calcium line to complete desulfurization, regulation
Molten steel [Al] and [Ca], the regulation refining task such as temperature and inclusion removal, when LF refining is tapped, [Al] in molten steel is
0.045%,For 10 × 10-6, poured into a mould using full guard during basket pouring, using Al2O3- C matter is integrally filled in
Rod is to control molten steel flow velocity in casting process.Al used by tundish molding casting process2O3In-C matter integral column of sagger
Al2O3Weight/mass percentage composition is 62%, SiO2Weight/mass percentage composition is 12.3%, ZrO2Weight/mass percentage composition is 7.4%.LF essences
During refining, the power of agitator of argon gas is 60W/t before hello calcium line, feeds soft mixing time 10min after calcium line；In the outbound molten steel of LF
[S] is 0.0070%.For aluminium-killed-cold-heading steel during basket pouring, target superheat degree is 30 DEG C.
Cast terminates rear stopper head microscopic appearance as shown in figure 5, conversion zone still keeps fine and close.
The a kind of of this case design reduces Al2O3The process that-C matter stopper corrodes is by adjusting argon gas system, temperature control
And the mode such as [Ca] content in molten steel, it on the one hand ensure that the aluminate in molten steel is fully modified, the opposing party
Face avoids serious stopper and corroded so that the casting sequence and molten steel cleanness of tundish are significantly improved.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to the specific reality of the present invention
The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in accompanying drawing and according to
What the embodiments of the present invention of accompanying drawing description were merely exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
Show and according to the solution of the present invention closely related structure and/or processing step, and eliminate little with relation of the present invention
Other details.
Finally, it is to be noted that, term " comprising ", "comprising" or its any other variant be intended to it is non-exclusive
Property includes, so that process, method, article or equipment including a series of elements not only include those key elements, and
Also include the other element that is not expressly set out, or also include for this process, method, article or equipment inherently
Key element.
Claims (6)
1. reduce Al during one kind cast aluminium-killed-cold-heading steel2O3The method that-C matter stopper corrodes, using Al2O3- C matter integral column of sagger with
Molten steel flow velocity in casting process is controlled, cast aluminium-killed-cold-heading steel includes LF refining and basket pouring, it is characterised in that：LF essences
When producing steel, it is 0.030%~0.055% to control [Al] in molten steel,For (3.6~12.8) × 10-6,
And meet：Al2O3Al in-C matter integral column of sagger2O3Weight/mass percentage composition is not less than 50%, SiO2Weight/mass percentage composition is not higher than
15%, ZrO2Weight/mass percentage composition is not less than 5%.
2. reduce Al during cast aluminium-killed-cold-heading steel according to claim 12O3The method that-C matter stopper corrodes, its feature
It is：The LF refining includes white slag refining, argon bottom-blowing, feeds aluminum steel and feeds calcium line.
3. reduce Al during cast aluminium-killed-cold-heading steel according to claim 22O3The method that-C matter stopper corrodes, its feature
It is：The power of agitator of argon gas is 40~65W/t before hello the calcium line, and soft mixing time is not less than 5min after feeding calcium line.
4. reduce Al during cast aluminium-killed-cold-heading steel according to claim 12O3The method that-C matter stopper corrodes, its feature
It is：When LF refining is tapped, [S] is not higher than 0.0085% in molten steel.
5. reduce Al during cast aluminium-killed-cold-heading steel according to claim 12O3The method that-C matter stopper corrodes, its feature
It is：The basket pouring is poured into a mould for full guard.
6. reduce Al during cast aluminium-killed-cold-heading steel according to claim 52O3The method that-C matter stopper corrodes, its feature
It is：During basket pouring, the degree of superheat is 20~35 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633045.6A CN107475484A (en) | 2017-07-28 | 2017-07-28 | Al reduction during aluminum casting killed cold heading steel2O3Erosion method of-C stopper rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633045.6A CN107475484A (en) | 2017-07-28 | 2017-07-28 | Al reduction during aluminum casting killed cold heading steel2O3Erosion method of-C stopper rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930583A (en) * | 2021-09-17 | 2022-01-14 | 北京科技大学 | Method for improving pouring stability of calcium-treatment-free low-carbon aluminum killed steel |
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2017
- 2017-07-28 CN CN201710633045.6A patent/CN107475484A/en active Pending
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| CN102337378A (en) * | 2011-10-31 | 2012-02-01 | 首钢总公司 | Process for removing non-metallic inclusions in molten steel |
| CN102747269A (en) * | 2012-05-22 | 2012-10-24 | 内蒙古包钢钢联股份有限公司 | Low-silicon aluminum-containing steel and production method thereof |
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Application publication date: 20171215 |