CN1327007C - Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking - Google Patents
Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking Download PDFInfo
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- CN1327007C CN1327007C CNB2005100475478A CN200510047547A CN1327007C CN 1327007 C CN1327007 C CN 1327007C CN B2005100475478 A CNB2005100475478 A CN B2005100475478A CN 200510047547 A CN200510047547 A CN 200510047547A CN 1327007 C CN1327007 C CN 1327007C
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 20
- 239000000956 alloy Substances 0.000 title claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 18
- 239000010703 silicon Substances 0.000 title claims description 15
- 238000009628 steelmaking Methods 0.000 title claims description 11
- 229910014460 Ca-Fe Inorganic materials 0.000 title claims description 10
- 239000005864 Sulphur Substances 0.000 title description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 229910052791 calcium Inorganic materials 0.000 abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 1
- 238000009749 continuous casting Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 239000011575 calcium Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 241001062472 Stokellia anisodon Species 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 101100382265 Mus musculus Ca15 gene Proteins 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001336 Semi-killed steel Inorganic materials 0.000 description 1
- 229910018619 Si-Fe Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910008289 Si—Fe Inorganic materials 0.000 description 1
- 229910006639 Si—Mn Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to an AlMgCaFe alloy for producing steel with low contents of C, Si, P and S. The alloy used as steel production terminal deoxidizing agents is used for producing steel with low contents of C, Si and S, and steel requiring Al to be dissolved in acid. The alloy is prepared from 120 to 85 wt% of AL, 5 to 20 wt% of Mg, 1 to 15 wt% of Ca, at most 0.02 wt% of C, at most 1.0 wt% of Si, at most 0.02 wt% of P, at most 0.02% of S and Fe as the rest. The alloy is smelted in a line frequency furnace. The deoxidizing agents of the present invention have the advantages of convenient use, large specific gravity, no pulverization, good and stable deoxidation and desulphurization effect, high yield of various alloy elements, good fluidity of molten steel treated by the deoxidizing agents, no blockage of water gaps, high self-flowing rate, high continuous casting rate, high work rate, good benefit, good mechanical property, good steel quality, long service life and good social benefit, and deoxidation products of the present invention are easy to float upward to discharge impurities, change the impurity form and refine crystal grains.
Description
Technical field
The present invention relates to the iron alloy of field of metallurgy steel-making usefulness, be specially a kind of low silicon of trace carbon of usefulness, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy of making steel.
Background technology
Silico-calcium, Alsimin are done the end-deoxidizer of steel-making usefulness, effect is generally acknowledged, the complex deoxidizer for steelmaking of Chu Xianing generally all contained silicon in recent years, though this type of siliceous reductor has deoxidation effect preferably, but the steel grade that is used for the smelting requirements good toughness, when the composition that contains silicon in the steel is higher, the toughness of steel is reduced.The low carbon low silicon of being badly in need of on the market, low-phosphorous, doctor negative steel are a lot, and such steel grade is smelted in the influence that is subjected to reductor, and to be smelt rate very low, and the performance of enterprises is subjected to very big loss.Want smelting low carbon, low-phosphorous, doctor negative steel, the composition of stokehold steel is qualified, and still one adds end-deoxidizer, again C, P, S is increased up, also will carry out refining treatment then, influences the quality of steel, increases the treatment time and increases cost.
For molten steel is carried out deep deoxidation, desulfurization, make the deoxidation products come-up fast, can change inclusion morphology and crystal grain thinning again, particularly in casting cycle, guarantee that fluidity molten steel is good, the mouth of a river does not have the phenomenon of mouth of a river dross, eliminated cutout,, connected and water rate, operating rate height from the flow rate height.This end-deoxidizer is the steel-making reductor regeneration product that the present invention researchs and develops out.
Summary of the invention
At above-mentioned weak point, the object of the present invention is to provide a kind of low silicon of trace carbon of usefulness, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy of making steel, solve the bad problem of final deoxygenation effect that exists in the prior art, as the steel-making end-deoxidizer, do not need steel is carried out refining again, improve the quality of steel, reduce cost, be applicable to the steel grade of smelting requirements Als and low C, low P, low S.
Technical scheme of the present invention is:
A kind of low silicon of trace carbon of usefulness, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy of making steel, by weight percentage, Al 20-85, Mg 5-20, Ca 1-15, C≤0.02, Si≤1.0, P≤0.02, S≤0.02, Fe surplus.
The trace carbon of described steel-making usefulness hangs down silicon, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy, and by weight percentage, preferable composition is: Al 50-58, Mg 5-15, Ca 5-15, C≤0.02, Si≤1.0, P≤0.02, S≤0.02, Fe surplus.
Reductor of the present invention, wherein Al is strong reductor, and magnesium, reductor and sweetening agent that calcium is strong especially, silicon, aluminium, magnesium, calcium alloy add in the molten steel, silicon, aluminium and other fundamental element optimum solvation in the alloy improve remaining calcium, Mg content, and active and vapour pressure increases.When the steam bubble that generates calcium, magnesium contact with the liquid metal surface can be energetically with steel in impurity (oxygen, sulphur) homogeneous takes place or heterogeneous body reacts, right to use liquid steel refining.The boiling that calcium, magnesium elements change gas phase and molten metal into helps the cohesion and the eliminating of degasification and inclusion metallic.Because calcium, magnesium elements add molten steel with alloy form, change has all taken place in the vapour pressure of each element, density, fusing point, so the effect of each element has all obtained enhancing, has changed the form of inclusion, reduce the inclusion total amount, improved utilization ratio and deoxidation, sweetening effectiveness.
The invention has the beneficial effects as follows:
1, reductor of the present invention stores easily than great, not efflorescence.
2, the molten steel handled of reductor of the present invention, good fluidity, casting smoothly, mouth of a river non-nodulating, from flow rate, connect and water the rate height, the operating rate height, enterprise is profitable.
3, reductor deoxidation of the present invention, sweetening effectiveness are good, stable, and alloying element recovery rate height can reduce cost.
4, reductor of the present invention can change inclusion morphology, and the deoxidation products fusing point is low, and easily come-up reduces the inclusion total amount, and steel is pure, and steel quality is good.
5, adopt the reductor of the present invention can crystal grain thinning, mechanical property has good improvement, and steel product quality is good, high life, and social benefit is considerable.
Embodiment
One, the low silicon of the trace carbon of steel-making usefulness, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy (reductor) Chemical Composition:
| Title | Al (wt％) | Mg (wt％) | Ca (wt％) | C (wt％) | Si (wt％) | P (wt％) | S (wt％) | Fe (wt％) | Proportion (g/cm 3) | Fusing point (℃) | Granularity (mm) |
| 20-85 | 1-20 | 1-15 | ≤0.02 | ≤1.0 | ≤0.02 | ≤0.02 | Surplus | 3.6-4.45 | 980-1016 | 30-60 |
Two, manufacturing processed
The present invention adopts the main frequency furnace melting of 1.0T or 1.5T, and starting material are (%) by weight percentage: aluminium ingot 20-85%, magnesium ingot 1-25%, calcium metal 1-20%, steel scrap scrap stock 1-75%.The present invention selects materials by the fine fodder policy, and preparation meticulously is placed in the main frequency furnace and smelts in proportion.All fusing back sample examinations are analyzed each composition, after composition is qualified, slag hitting, come out of the stove, and cast little ingot by specification requirement, do multianalysis by the standard sampling again, all warehousing after passing, packing, deliver goods.
Three, service condition
The present invention can be 40
T, 60
T, 100
T, 150
T, 170
T, 200
TOn probation in the converter, it is a lot of to smelt steel grade, and rimming steel, semikilled steel, killed steel, steel alloy can use, wherein, and rimming steel such as H08A, 15F, F11, F18, HK, killed steel such as Q235,08Al, 15Mn, 15
#, 20Gu, steel grades such as steel alloy such as 09CuP, UnMn, 08CuPVxe.Because this end-deoxidizer is than great, the deoxidation degree is good, and the recovery rate height of Al satisfies in the steel requirement to Als, also satisfies the composition requirement of steel grade to C, P, S simultaneously.
Four, use
1, the present invention is applicable in smelting low carbon, low silicon, the production of low-phosphorous, doctor negative steel grade.
2, the present invention is applicable to steel grades such as geology down-hole, mine, oil.
3, the present invention is applicable to and smelts the lower steel grade of oxygen content in steel.
4, the present invention is applicable to the steel grade of particular requirement condition.
Embodiment 1 (weight percent)
Al50, Mg15, Ca15, C0.017, Si0.9, P0.017, S0.018, Fe surplus.
The end-deoxidizer that above-mentioned alloy is used for the 09CuP steel, go out by big jar 1/4 o'clock to add alloy: Mn-Fe, Si-Fe, Si-Mn at molten steel, add end-deoxidizer at last, add order by weak, in, strong, add end-deoxidizer Al-Mg-Ca-Fe alloy at last, go out to big jar must add in 3/4 o'clock to molten steel.Must accomplish pushing off the slag tapping, steel mouth main point is repaired, and prevents that the pool from advancing in big jar, influences deoxidation effect.This reductor is than great, and deoxidation effect is good, the operating rate height, and cost is low, and steel product quality is good.
Present embodiment 09CuP steel grade finished product chemical ingredients is:
| C(wt％) | Si(wt％) | Mn(wt％) | P(wt％) | S(wt％) | Ca(wt％) | Fe(wt％) | Oxygen content in steel |
| 1.0 | 0.31 | 0.45 | 0.08 | 0.021 | 0.30 | Surplus | 34.6ppm |
Steel performance:
| Grain fineness number | Yield strength (kg/mm 2) | Tensile strength (kg/mm 2) | Unit elongation (%) | 180 ° of clod wash intensity |
| 8.5-9.5 level | 27 | 41 | 27 | d＝a |
09CuP steel plate thickness is 2.5mm, and the reductor add-on is 0.68kg/t.
D represents the flexual center diameter in the last table, and a represents sample thickness.
Embodiment 2
Difference from Example 1 is: (weight percent)
Al55, Mg10, Ca10, C0.016, Si0.8, P0.015, S0.019, Fe surplus.
Embodiment 3
Difference from Example 1 is: (weight percent)
Al58, Mg5, Ca5, C0.017, Si0.7, P0.016, S0.012, Fe surplus.
Embodiment 4
Difference from Example 1 is: (weight percent)
Al20, Mg20, Ca15, C0.014, Si0.8, P0.019, S0.018, Fe surplus.
Embodiment 5
Difference from Example 1 is: (weight percent)
Al85, Mg5, Ca1, C0.014, Si0.6, P0.01 8, S0.013, Fe surplus.
Embodiment 6
Difference from Example 1 is: (weight percent)
Al70, Mg6, Ca6, C0.013, Si0.9, P0.019, S0.017, Fe surplus.
When the present invention used at final deoxygenation, ton molten steel add-on was 0.6-1.4kg/t, and compared with prior art, cost reduces greatly.And in the prior art, C, P, S content height in the reductor influence the quality of steel and increase the treatment time, strengthen steel-making cost.End-deoxidizer of the present invention uses easy to operate, deoxidation effect is good, yield of alloy height, steel grade are smelt the rate height, and steel quality is good, and the dissolved oxygen in the reduction steel, reduce nonmetallic inclusionsin steel, crystal grain thinning, the inner quality and the work-ing life of improving steel, satisfy user's demand, play the effect of upgrading consumption reduction again.
Claims (2)
1, a kind of low silicon of trace carbon of usefulness, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy of making steel is characterized in that: by weight percentage, and Al20-85, Mg5-20, Ca1-15, C≤0.02, Si≤1.0, P≤0.02, S≤0.02, Fe surplus.
2, according to the low silicon of trace carbon of the described steel-making usefulness of claim 1, low-phosphorous, doctor negative Al-Mg-Ca-Fe alloy, it is characterized in that by weight percentage Al50-58, Mg5-15, Ca5-15, C≤0.02, Si≤1.0, P≤0.02, S≤0.02, Fe surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100475478A CN1327007C (en) | 2005-10-26 | 2005-10-26 | Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100475478A CN1327007C (en) | 2005-10-26 | 2005-10-26 | Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking |
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| Publication Number | Publication Date |
|---|---|
| CN1831148A CN1831148A (en) | 2006-09-13 |
| CN1327007C true CN1327007C (en) | 2007-07-18 |
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| CNB2005100475478A Active CN1327007C (en) | 2005-10-26 | 2005-10-26 | Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3971306A4 (en) * | 2019-06-17 | 2022-05-18 | JFE Steel Corporation | Method for adding ca to molten steel |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595304C (en) * | 2006-09-12 | 2010-03-24 | 谢英凯 | Composite alloy for steel-making deoxidization and microalloying |
| CN102041352B (en) * | 2011-01-11 | 2013-02-06 | 刘锋 | Multi-element compound deoxidizer as well as preparation method and application thereof |
| CN102605143A (en) * | 2011-01-25 | 2012-07-25 | 宝山钢铁股份有限公司 | Aluminum-magnesium-calcium alloy and application thereof in controlling stainless steel impurities |
| CN104087720A (en) * | 2014-07-16 | 2014-10-08 | 谢廷声 | Aluminum base alloy for steelmaking and preparation method thereof |
| CN109207802A (en) * | 2017-07-05 | 2019-01-15 | 太仓捷公精密金属材料有限公司 | A kind of aluminum alloy materials |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262337A (en) * | 2000-02-02 | 2000-08-09 | 王忠英 | One-step process for producing SiCaAlBaFe alloy with ore roaster |
| JP2002121641A (en) * | 2000-08-10 | 2002-04-26 | Nippon Steel Corp | High tensile strength steel for welding excellent in toughness of ultralarge heat input heat affected zone and its production method |
| CN1439727A (en) * | 2003-03-24 | 2003-09-03 | 郭庆成 | Al-Ca-Mg-Fe alloy for final deoxidisation of molten steel and its preparation |
-
2005
- 2005-10-26 CN CNB2005100475478A patent/CN1327007C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262337A (en) * | 2000-02-02 | 2000-08-09 | 王忠英 | One-step process for producing SiCaAlBaFe alloy with ore roaster |
| JP2002121641A (en) * | 2000-08-10 | 2002-04-26 | Nippon Steel Corp | High tensile strength steel for welding excellent in toughness of ultralarge heat input heat affected zone and its production method |
| CN1439727A (en) * | 2003-03-24 | 2003-09-03 | 郭庆成 | Al-Ca-Mg-Fe alloy for final deoxidisation of molten steel and its preparation |
Non-Patent Citations (1)
| Title |
|---|
| 冶炼洁净钢应用的复合净化剂合金 肖清安等，铁合金，第155期 2000 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3971306A4 (en) * | 2019-06-17 | 2022-05-18 | JFE Steel Corporation | Method for adding ca to molten steel |
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| CN1831148A (en) | 2006-09-13 |
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Effective date of registration: 20070914 Address after: The Yangtze River Road 117100 in Liaoning Province, Benxi Manchu Autonomous County in the small town of No. 549 Benxi Smelter Group Co. Ltd. Patentee after: Benxi Smelting Group Co., Ltd. Address before: The Yangtze River Road 117100 in Liaoning Province, Benxi Manchu Autonomous County in the small town of No. 549 (Benxi Smelter Group Co. Ltd) Patentee before: Li Xingyou |