CN109778053A - Vacuum smelting process of high-manganese high-aluminum high-titanium steel - Google Patents
Vacuum smelting process of high-manganese high-aluminum high-titanium steel Download PDFInfo
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- CN109778053A CN109778053A CN201910001480.6A CN201910001480A CN109778053A CN 109778053 A CN109778053 A CN 109778053A CN 201910001480 A CN201910001480 A CN 201910001480A CN 109778053 A CN109778053 A CN 109778053A
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- 239000011572 manganese Substances 0.000 title claims abstract description 46
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910001200 Ferrotitanium Inorganic materials 0.000 title claims abstract description 19
- 238000003723 Smelting Methods 0.000 title abstract description 5
- 239000010936 titanium Substances 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 25
- 230000008018 melting Effects 0.000 claims abstract description 25
- 238000007670 refining Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 21
- 238000005275 alloying Methods 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 210000000795 conjunctiva Anatomy 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 229910000712 Boron steel Inorganic materials 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000007499 fusion processing Methods 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000005422 blasting Methods 0.000 claims description 2
- 235000000396 iron Nutrition 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 238000010309 melting process Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 13
- 229910000521 B alloy Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a vacuum melting process of high-manganese high-aluminum high-titanium steel, which mainly comprises an initial melting stage, a refining stage, an alloying stage and an electrified pouring stage. Carbon particles are added in the primary melting stage, the melting speed is limited, a small amount of Al is added, and the high-power stirring is carried out, so that the dissolved oxygen in the molten steel is reduced; the minimum volatility of Mn and the component uniformity of molten steel can be ensured by combining the adding sequence of the alloy, the melting rate, the temperature of the molten steel and the heat preservation time, and the pressure in the furnace, the melting rate, the temperature of the molten steel and the heat preservation time in the alloying stage. The method solves the problem of the oxidation loss of manganese, aluminum and titanium in the production process of the high-manganese high-aluminum high-titanium steel, and achieves the aim of accurately controlling the chemical components of the high-manganese high-aluminum high-titanium steel. By the smelting process, the yield of Mn can reach more than 93 percent, and the yield of Al and Ti can reach more than 97 percent.
Description
Technical field
The invention belongs to metallurgical technology field, in particular to a kind of vacuum metling technique of the high high titanium steel of manganese high alumina.
Background technique
Often using vaccum sensitive stove as main smelting equipment in scale up test, since Mn has strong volatilization, easily oxidizable,
Al and Ti has Strong oxdiative, therefore when the high titanium steel vacuum melting of high manganese high alumina, and the comprehensively control of Mn, Al, Ti are a difficult points.Mesh
Before, to the method for controlling of a certain of these three elements or certain two kinds of element, patent when the prior art describes vacuum induction melting
CN108715971A discloses a kind of Aludirome vacuum metling technique, only describes the method for controlling of two kinds of elements of Al, Ti,
And Ti constituent content is lower.
When titanium steel vacuum melting high for the high manganese high alumina of raising, the synthesis recovery rate of tri- kinds of elements of Mn, Al, Ti, and meanwhile it is accurate
Control chemical component, it is necessary to develop a kind of high titanium steel vacuum melting technique of high manganese high alumina, tri- kinds of members of comprehensively control Mn, Al, Ti
The recovery rate of element, makes the recovery rate of every kind of element reach 90% or more.
Summary of the invention
The purpose of the present invention is to provide a kind of vacuum metling techniques of high high titanium steel of manganese high alumina, pass through setting for smelting technology
Meter solves manganese in production process and largely volatilizees and oxidational losses and the oxidational losses of aluminium and titanium, reaches and accurately control high manganese high alumina
The purpose of high titanium steel chemical component.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of vacuum metling technique of the high high titanium steel of manganese high alumina, including incipient melting stage, refining stage, alloying, band
The electric casting stage；Wherein:
(1) the incipient melting stage: the entire incipient melting stage carries out under vacuum conditions, and first charge is that whole ingot irons and carbon granules are total
The 48-52% of amount, burn-off rate 0.5-1kg/min make the dissolved oxygen in molten steel be reduced to 40ppm or less；It is complete to first charge
After 3-5min is melted in portion, Al are added, Al are completely melt that rear content is 0.1-0.2wt.%, and Al fusion process to fine melt terminates
In 2-3min the power of vaccum sensitive stove be rated power 80%-90%, make the dissolved oxygen in molten steel be reduced to 25ppm with
Under；
(2) refining stage: after incipient melting, remaining carbon granules is added, refining temperature is 1250-1300 DEG C, and refining time is
12-14min, refining vacuum degree are 50-80Pa, and the dissolved oxygen in molten steel is made to be reduced to 20ppm or less；
(3) alloying: power failure conjunctiva enters alloying after refining, and Al, sea are successively added in batches
Continuous Ti, burn-off rate 1-1.5kg/min keep 3-5min after fine melt at 1250-1300 DEG C, and power failure conjunctiva is simultaneously filled into furnace
Enter and metal Mn is added after argon gas, burn-off rate 4-5kg/min keeps 5-6min at a temperature of 1230-1250 DEG C after fine melt；
(4) it is poured the stage: sampling analysis ladle chemistry after the completion of alloying, after ingredient is met the requirements, is surveyed
Temperature simultaneously guarantees that tapping temperature charges casting within the scope of 1180-1200 DEG C.
Further, alloying is added in metal Mn forehearth in the vacuum metling technique of the high high titanium steel of manganese high alumina
Pressure 50000-60000Pa.
Further, at 200 DEG C before first charge and alloy use in the vacuum metling technique of the high high titanium steel of manganese high alumina
At a temperature of toast 2-3 hours, ingot iron by impeller blasting handle.
Further, in the vacuum metling technique of the high titanium high boron steel of high manganese high alumina in the high high titanium high boron steel of manganese high alumina
C 0.1-0.2wt.%, Al 4-6wt.%, Ti 7-9wt.%, Mn 5-7wt.%.
Compared with prior art, the invention has the following advantages:
The incipient melting stage is added carbon granules and limits molten speed in the present invention, can remove the dissolved oxygen in molten steel to the maximum extent, drop
A possibility that oxidation reaction occurs for low Mn, Al, Ti, the addition of a small amount of Al and high-power stirring keeps dissolved oxygen in Al and molten steel abundant
It reacts and is bonded in reaction product on furnace lining, further decrease the dissolved oxygen in molten steel；Addition sequence, fusing in conjunction with alloy
Rate, molten steel temperature and soaking time can meet the abundant release of gas in Al and sponge Ti, the furnace internal pressure of alloying
Power, melting rate, molten steel temperature and soaking time, it is ensured that the minimum volatility of Mn and the homogeneity of ingredients of molten steel.Pass through this
The smelting process of invention, Mn recovery rate is up to 93% or more, and Al, Ti recovery rate are up to 97% or more.
Specific embodiment
The present invention is described in further detail below with reference to embodiment.
Preferred embodiments below is described in further detail technical solution of the present invention, but not limited to this.
For using 150kg vaccum sensitive stove to produce 2 (single weight about 80kg) square ingot.Raw material are respectively industry
Pure iron, sponge Ti, Al, metal Mn, B-Fe alloy, carbon granules.Ingot iron passes through processing of rust removing, C, Al, sponge Ti, gold
Belong to Mn to toast 2-3 hours at a temperature of 200 DEG C using preceding.
Embodiment 1
The high high titanium steel of manganese high alumina target component requirement are as follows: C 0.18% (wt.), Mn 6% (wt.), Ti 8% (wt.),
Al 4.5% (wt.), B 4% (wt.), surplus are Fe and inevitable impurity element.
(1) the incipient melting stage: the entire incipient melting stage carries out under vacuum conditions, furnace pressure≤30Pa, and first charge is all
The 48% of ingot iron and carbon granules total amount, burn-off rate 0.5-1kg/min, after first charge all melts and continues 5min,
Al are added, Al are completely melt that rear content is 0.2% (wt.), and Al fusion process to fine melt terminates to keep 130kW big in 3min
Power.
(2) refining stage: after incipient melting, remaining carbon granules is added and enters refining stage, refining temperature 1280-1300
DEG C, refining time 14min, refining vacuum degree is 50-60Pa.
(3) alloying: power failure conjunctiva enters alloying after refining, and whole Al is successively added in batches
Grain and sponge Ti, B alloy, burn-off rate control keep 5min at 1250-1280 DEG C after 1-1.5kg/min, fine melt, have a power failure
Conjunctiva is simultaneously filled with addition metal Mn after 55000-58000Pa argon gas into furnace, and burn-off rate controls after 4-5kg/min, fine melt
6min is kept at a temperature of 1230-1250 DEG C.
(4) it is poured the stage: sampling analysis ladle chemistry after the completion of alloying, after ingredient is met the requirements, is surveyed
Temperature simultaneously guarantees that tapping temperature charges casting within the scope of 1180-1200 DEG C, pours into 2 side's 80kg ingots.
After demoulding, at every steel ingot steel ingot center apart from bottom and top 10cm and apart from surface of steel ingot 3cm respectively
It sets and respectively takes a sample, under substantially the same conditions analytical chemistry ingredient, following table lists the chemical component of this 8 samples.Steel
The basic segregation-free of ingot, Mn recovery rate is 94%, Al recovery rate is 98%, Ti recovery rate is 98%, B recovery rate is 99%.
| Number | C | Mn | Ti | Al | Fe |
| 1 in bottom | 0.175 | 5.65 | 7.88 | 4.42 | Bal |
| Bottom edge 1 | 0.173 | 5.68 | 7.81 | 4.40 | Bal |
| 1 in top | 0.176 | 5.71 | 7.89 | 4.39 | Bal |
| Top margin 1 | 0.175 | 5.70 | 7.86 | 4.41 | Bal |
| 2 in bottom | 0.171 | 5.64 | 7.81 | 4.39 | Bal |
| Bottom edge 2 | 0.173 | 5.63 | 7.86 | 4.42 | Bal |
| 2 in top | 0.175 | 5.66 | 7.88 | 4.46 | Bal |
| Top margin 2 | 0.176 | 5.69 | 7.84 | 4.42 | Bal |
Embodiment 2
The target component requirement of the high high titanium high boron steel of manganese high alumina are as follows: C 0.12% (wt.), Mn 6.5% (wt.), Ti
8.5% (wt.), Al 5% (wt.), B 4% (wt.), surplus are Fe and inevitable impurity element.
(1) the incipient melting stage: the entire incipient melting stage carries out under vacuum conditions, furnace pressure≤30Pa, and first charge is all
The 51% of ingot iron and carbon granules total amount, burn-off rate 0.5-1kg/min, after first charge all melts and continues 5min,
Al are added, Al are completely melt that rear content is 0.2% (wt.), and Al fusion process to fine melt terminates to keep 130kW big in 3min
Power.
(2) refining stage: after incipient melting, remaining carbon granules is added and enters refining stage, refining temperature 1260-1280
DEG C, refining time 14min, refining vacuum degree is 50-60Pa.
(3) alloying: power failure conjunctiva enters alloying after refining, and whole Al is successively added in batches
Grain and sponge Ti, B alloy, burn-off rate control keep 5min at 1240-1270 DEG C after 1-1.5kg/min, fine melt, have a power failure
Conjunctiva is simultaneously filled with addition metal Mn after 55000-58000Pa argon gas into furnace, and burn-off rate controls after 4-5kg/min, fine melt
6min is kept at a temperature of 1220-1240 DEG C.
(4) it is poured the stage: sampling analysis ladle chemistry after the completion of alloying, after ingredient is met the requirements, is surveyed
Temperature simultaneously guarantees that tapping temperature charges casting within the scope of 1170-1190 DEG C, pours into 2 side's 80kg ingots.
After demoulding, at every steel ingot steel ingot center apart from bottom and top 10cm and apart from surface of steel ingot 3cm respectively
It sets and respectively takes a sample, under substantially the same conditions analytical chemistry ingredient, following table lists the chemical component of this 8 samples.Steel
The basic segregation-free of ingot, Mn recovery rate is 94.5%, Al recovery rate up to 98%, Ti recovery rate be 98.5%, B recovery rate is
98.5%.
| Number | C | Mn | Ti | Al | Fe |
| 1 in bottom | 0.127 | 6.20 | 8.40 | 4.92 | Bal |
| Bottom edge 1 | 0.124 | 6.19 | 8.39 | 4.91 | Bal |
| 1 in top | 0.117 | 6.15 | 8.42 | 4.93 | Bal |
| Top margin 1 | 0.128 | 6.18 | 8.41 | 4.94 | Bal |
| 2 in bottom | 0.129 | 6.19 | 8.44 | 4.96 | Bal |
| Bottom edge 2 | 0.127 | 6.14 | 8.41 | 4.94 | Bal |
| 2 in top | 0.119 | 6.18 | 8.42 | 4.91 | Bal |
| Top margin 2 | 0.126 | 6.16 | 8.43 | 4.95 | Bal |
The above embodiment of the present invention is only example to illustrate the invention, and is not to implementation of the invention
The restriction of mode.For those of ordinary skill in the art, other can also be made not on the basis of the above description
With the variation and variation of form.Here all embodiments can not be exhaustive.It is all to belong to technical solution of the present invention
Changes and variations that derived from are still in the scope of protection of the present invention.
Claims (4)
1. a kind of vacuum metling technique of the high high titanium steel of manganese high alumina, it is characterised in that: including incipient melting stage, refining stage, alloy
Change stage, electrification casting stage；Wherein:
(1) the incipient melting stage: the entire incipient melting stage carries out under vacuum conditions, and first charge is whole ingot irons and carbon granules total amount
48-52%, burn-off rate 0.5-1kg/min make the dissolved oxygen in molten steel be reduced to 40ppm or less；It is all molten to first charge
After changing 3-5min, Al are added, Al are completely melt that rear content is 0.1-0.2wt.%, and Al fusion process to fine melt terminates 2-
The power of vaccum sensitive stove is the 80%-90% of rated power in 3min, and the dissolved oxygen in molten steel is made to be reduced to 25ppm or less；
(2) refining stage: after incipient melting, remaining carbon granules is added, refining temperature is 1250-1300 DEG C, refining time 12-
14min, refining vacuum degree are 50-80Pa, and the dissolved oxygen in molten steel is made to be reduced to 20ppm or less；
(3) alloying: power failure conjunctiva enters alloying after refining, and Al, sponge Ti are successively added in batches,
Burn-off rate is 1-1.5kg/min, keeps 3-5min after fine melt at 1250-1300 DEG C, and power failure conjunctiva is simultaneously filled with argon into furnace
Metal Mn, burn-off rate 4-5kg/min are added after gas, keeps 5-6min at a temperature of 1230-1250 DEG C after fine melt；
(4) be poured the stage: sampling analysis ladle chemistry after the completion of alloying, after ingredient is met the requirements, thermometric is simultaneously
Guarantee that tapping temperature charges casting within the scope of 1180-1200 DEG C.
2. the vacuum metling technique of the high high titanium steel of manganese high alumina according to claim 1, it is characterised in that: the alloying rank
Furnace pressure 50000-60000Pa before metal Mn is added in section.
3. the vacuum metling technique of the high high titanium steel of manganese high alumina according to claim 1, it is characterised in that: the first charge and
Alloy is toasted 2-3 hours at a temperature of 200 DEG C using preceding, and ingot iron is handled by impeller blasting.
4. according to claim 1 in -3 the high high titanium steel of manganese high alumina described in any claim vacuum metling technique, feature
It is: C 0.1-0.2wt.%, Al 4-6wt.%, Ti 7-9wt.%, Mn 5- in the high high titanium high boron steel of manganese high alumina
7wt.%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318001A (en) * | 2019-06-27 | 2019-10-11 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel for diamond wire bus and smelting method thereof |
| CN111500919A (en) * | 2020-05-29 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of high-cleanliness high-titanium low-carbon steel |
| CN114293090A (en) * | 2022-01-07 | 2022-04-08 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114350899A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Control Ti for smelting high-titanium steel by induction furnace2O3TiN-doped method |
| CN115786636A (en) * | 2022-12-15 | 2023-03-14 | 河钢股份有限公司 | Method for smelting high-purity iron-chromium-aluminum alloy by vacuum induction furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110318001A (en) * | 2019-06-27 | 2019-10-11 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel for diamond wire bus and smelting method thereof |
| CN110318001B (en) * | 2019-06-27 | 2021-06-22 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel for diamond wire bus and smelting method thereof |
| CN111500919A (en) * | 2020-05-29 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of high-cleanliness high-titanium low-carbon steel |
| CN111500919B (en) * | 2020-05-29 | 2021-12-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of high-cleanliness high-titanium low-carbon steel |
| CN114293090A (en) * | 2022-01-07 | 2022-04-08 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114350899A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Control Ti for smelting high-titanium steel by induction furnace2O3TiN-doped method |
| CN114351034B (en) * | 2022-01-07 | 2022-08-16 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114293090B (en) * | 2022-01-07 | 2022-10-18 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
| CN114350899B (en) * | 2022-01-07 | 2023-01-17 | 鞍钢股份有限公司 | Control Ti for smelting high-titanium steel by induction furnace 2 O 3 TiN-doped method |
| CN115786636A (en) * | 2022-12-15 | 2023-03-14 | 河钢股份有限公司 | Method for smelting high-purity iron-chromium-aluminum alloy by vacuum induction furnace |
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