CN1317584A - Al-Mg alloy for deoxidizing and desulfurizing in smelting steel - Google Patents
Al-Mg alloy for deoxidizing and desulfurizing in smelting steel Download PDFInfo
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- CN1317584A CN1317584A CN 01109969 CN01109969A CN1317584A CN 1317584 A CN1317584 A CN 1317584A CN 01109969 CN01109969 CN 01109969 CN 01109969 A CN01109969 A CN 01109969A CN 1317584 A CN1317584 A CN 1317584A
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- steel
- alloy
- deoxidation
- aluminium
- deoxidizing
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Abstract
An A-Mg alloy with the shape of ring, thread, segment, or small ball for dioxidization and desulfurization in smelting steel contains Al (30-98 wt.%), Mg (2-70 wt.%) and impurities. Its advantages are high effect (oxygen in steel is less than 30 ppm and sulfur in steel is less than 0.003%) and high steel quality.
Description
The present invention is a kind of aluminum magnesium alloy of using deoxidation and desulfurization of making steel, and it has the deoxidation of molten steel of making and sweetening effectiveness.Belong to steelmaking technical field.
Aluminium has very big avidity to oxygen, and as the reductor of steel-making, it has obtained widespread use.
Aluminium is used for the deoxidation and the crystal grain thinning of steel, adjusts the austenite crystal growth, thereby improves the plasticity and the toughness of steel.Known multiple steel will be handled through further adding aluminium, can reduce the possibility of steel ingot or steel billet generation subsurface bubble with aluminium, and the crystallization refinement can improve steel impelling strength longitudinally.Because low, the easy scaling loss of light specific gravity, fusing point of aluminium is received lowly with aluminium deoxidation, effective rate of utilization is also low, and in air and under the effect of the oxygen in the slag, nearly 70～90% aluminium is oxidized, thereby remaining aluminium had both hanged down also unstable in the steel.
Magnesium is the optimum feed stock of a kind of reductor, particularly liquid steel desulphurization.But because magnesium has very high vapour pressure, very easily vaporize and burn, so it is all very difficult to be directly used in the deoxidation and the desulfurization of steel-making.
Aluminium and magnesium are ideal deoxidation and the sweetening agents of steel-making, and when particularly aluminium and magnesium being used jointly, they have the obvious synergistic effect, thereby good deoxidation, sweetening effectiveness are arranged.But, proportion little etc. low, inflammable owing to its fusing point makes it be difficult to directly join in the molten steel, can not be directly used in the deoxidation and the desulfurization of steel-making, influences its application in practice.
The present invention makes alloy for addressing this problem with magnalium, to utilize their above-mentioned synergistic effects.For ease of described aluminum magnesium alloy is added in the molten steel, aluminum magnesium alloy can be cast alloy hoop simultaneously,, can increase proportion like this, make it sink to the molten steel deep, be convenient to the use of producing simultaneously again so that string together in the adding molten steel with steel rod; Also described aluminum magnesium alloy wire rod can be made, in feeding wire machine feeding molten steel, the recovery rate of alloy can be improved like this; Also described aluminum magnesium alloy can be made segment or bead, inject in the molten steel with spray gun.
For this reason, the invention provides a kind of aluminum magnesium alloy with strong deoxidation, sweetening power, the Chemical Composition of described alloy (weight %) is: Al 30～98%, and Mg 2～70%, and unavoidable impurities.
Described impurity is mainly Si.
This alloy shape can be made into ring-type, wire, section shape or coccoid etc. in any.
The manufacture method of described Al-Mg-Fe alloy is: with described Al, Mg puts into smelting furnace and melts.Cast ring-type, wire, section shape or coccoid etc. after the fusing.
Though aluminium among the present invention and magnesium all have very strong avidity with oxygen, sulphur, the two makes alloy together then the stronger deoxidation and the effect of desulfurization.Therefore, the present invention not only can improve steel product quality but also can reduce steel-making cost, increases economic efficiency.
Form and the structure of using alloy of the present invention to carry out the inclusion in the steel of deoxidation and desulfurization make moderate progress, find through scanning electron microscope analysis: the oxide inclusion of iron, magnesium mostly is strip, and its sulfide inclusion mostly is spherical, and the disperse distribution, seldom sees chain Al2O3 inclusion.Hard in the middle of these inclusiones that alloy of the present invention forms, the edge has elasticity, can reduce stress in System on Rolling Steel.
Less than 30 ppm, [S] less than 0.003%, as seen the good results are evident for its deoxidization desulfuration with [O] in the steel of alloy treatment of the present invention.
Embodiment:
The component content of described alloy (weight %) is: Al 90%, and Mg 10%.
With the Al of above-mentioned composition, Mg puts into induction furnace and melts, and makes alloy wire after the fusing.In 120 tons of converters, smelt 15
#Use its deoxidization desulfuration during steel, with X-ray machine X this alloy wire is injected in the molten steel, a ton steel adds 0.5 kilogram of this alloy, and mechanical property all is better than GB in the steel after tested, as following table:
The technical indicator (15 of table 1 embodiment
#)
| Standard | Yield-point (kg/ mm 2) be not less than | Tensile strength (kg/mm 2) be not less than | Elongation δ % is not less than | Section is received string shrinkage % and is not less than | ??[S] ??％ | ?[O] ?ppm |
| GB | ????23 | ????38 | ????27 | ????55 | ?0.004 | ??50 |
| This product | ????26 | ????41 | ????29.5 | ????61.5 | ?0.003 | ??28 |
Claims (2)
1, a kind of aluminum magnesium alloy that is used for deoxidation of molten steel and desulfurization, it is characterized in that the Chemical Composition (weight %) of described alloy is: Al 30～98%, and Mg 2～70%, and unavoidable impurities.
2, aluminum magnesium alloy as claimed in claim 1, it is characterized in that this alloy shape can be made into ring-type, wire, section shape or coccoid etc. in any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011099690A CN1150338C (en) | 2001-03-28 | 2001-03-28 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011099690A CN1150338C (en) | 2001-03-28 | 2001-03-28 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1317584A true CN1317584A (en) | 2001-10-17 |
| CN1150338C CN1150338C (en) | 2004-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011099690A Expired - Fee Related CN1150338C (en) | 2001-03-28 | 2001-03-28 | Al-Mg alloy for deoxidizing and desulfurizing in smelting steel |
Country Status (1)
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| CN (1) | CN1150338C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993976A (en) * | 2009-08-10 | 2011-03-30 | 鞍钢股份有限公司 | Aluminum killed steel refining deoxidation and desulfurization synthetic slag |
| CN102321780A (en) * | 2011-08-09 | 2012-01-18 | 广东北科科技发展有限公司 | Method for reducing content of total oxygen and inclusion of forfex material |
| WO2012129971A1 (en) * | 2011-03-31 | 2012-10-04 | 宝山钢铁股份有限公司 | Alloy for refining precipitates during production of steel and method of using same |
| CN105441633A (en) * | 2014-08-21 | 2016-03-30 | 武汉凌科达科技有限公司 | Preparation method of magnesium-aluminium composite oxygen scavenger |
| CN105441632A (en) * | 2014-08-21 | 2016-03-30 | 武汉凌科达科技有限公司 | Magnesium-aluminium composite oxygen scavenger |
-
2001
- 2001-03-28 CN CNB011099690A patent/CN1150338C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993976A (en) * | 2009-08-10 | 2011-03-30 | 鞍钢股份有限公司 | Aluminum killed steel refining deoxidation and desulfurization synthetic slag |
| CN101993976B (en) * | 2009-08-10 | 2013-09-04 | 鞍钢股份有限公司 | Aluminum killed steel refining deoxidation and desulfurization synthetic slag |
| WO2012129971A1 (en) * | 2011-03-31 | 2012-10-04 | 宝山钢铁股份有限公司 | Alloy for refining precipitates during production of steel and method of using same |
| CN102321780A (en) * | 2011-08-09 | 2012-01-18 | 广东北科科技发展有限公司 | Method for reducing content of total oxygen and inclusion of forfex material |
| CN105441633A (en) * | 2014-08-21 | 2016-03-30 | 武汉凌科达科技有限公司 | Preparation method of magnesium-aluminium composite oxygen scavenger |
| CN105441632A (en) * | 2014-08-21 | 2016-03-30 | 武汉凌科达科技有限公司 | Magnesium-aluminium composite oxygen scavenger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1150338C (en) | 2004-05-19 |
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Owner name: XIE TINGSHENG Free format text: FORMER OWNER: HE LIHUA Effective date: 20020308 |
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Effective date of registration: 20020308 Address after: 117100 Changjiang Road in Liaoning province Benxi County town No. 549 Benxi smelter Applicant after: Xie Tingsheng Address before: 117100 Changjiang Road in Liaoning province Benxi County town No. 549 Benxi smelter Applicant before: He Lihua |
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