CN103571997A - Magnesium-based deoxidized alloy and steelmaking deoxidization method - Google Patents
Magnesium-based deoxidized alloy and steelmaking deoxidization method Download PDFInfo
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- CN103571997A CN103571997A CN201310556397.8A CN201310556397A CN103571997A CN 103571997 A CN103571997 A CN 103571997A CN 201310556397 A CN201310556397 A CN 201310556397A CN 103571997 A CN103571997 A CN 103571997A
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Abstract
The invention provides a magnesium-based deoxidized alloy and a steelmaking deoxidization method. The magnesium-based deoxidized alloy comprises the following ingredients in percentage by weight: 10%-25% of Al, 45%-70% of Mg, 10%-25% of Ca, 1%-5% of Ba, and the balance of Fe and other inevitable impurities. The steelmaking deoxidization method comprises the step of deoxidizing the molten steel by adopting the magnesium-based deoxidized alloy. The magnesium-based deoxidized alloy and the steelmaking deoxidization method have the beneficial effects of having stronger desulfurization capability while the molten steel is deoxidized, converting the majority of entrained impurities in the deoxidized molten steel into composite entrained impurities, and further effectively enhancing the quality of the molten steel.
Description
Technical field
The invention belongs to steelmaking technical field, specifically, relate to a kind of magnesium base complex deoxidization alloy and a kind of deoxidation in steel making method of using this deoxygenated alloy.
Background technology
Conventionally, in steelmaking process, deoxidation is to utilize deoxidant element to reduce the process of molten steel oxygen level, comprises the floating and the eliminating that there are the deoxidation products producing in the deoxidant element of strong avidity and the deoxygenation of oxygen generation and reaction process with oxygen.The height of oxygen content in steel directly has influence on the quality and performance of final steel.High oxygen level can cause in molten steel condensation process, due to carbon and oxygen segregation dense poly-, will make carbon again be oxidized, make to produce in steel bubble, and have influence on the quality of steel; In addition, oxygen also can be with FeO, Fe
3o
4and other oxide form separates out, be distributed on crystal boundary surface, the plasticity of steel, mechanical property are declined, and produce hot-short, cold shortly, the quality product of special purpose steel is brought to a series of harm.
In modern STEELMAKING PRODUCTION, conventional method of deoxidation mainly contains three kinds: diffusive deoxidation, vacuum deaeration and bulk deoxidation.Because aluminium has that deoxidizing capacity is strong, efficiency is high, inclusion floating speed is fast, residue in steel can crystal grain thinning etc. advantage, so aluminium occupies important role in STEELMAKING PRODUCTION as reductor always.But, with aluminium deoxidation, also there are some problems: the density of aluminium is little, cause aluminium scaling loss in molten steel serious, utilization ratio is lower; After aluminium deoxidation, generate dystectic A1
2o
3inclusion causes continous casting sprue dross, causes continuous casting to interrupt; The A1 that aluminium deoxidation generates
2o
3once inclusion remains in steel the transverse mechanical performance to steel is produced to detrimentally affect; Bauxite resource is day by day poor, causes aluminium price high, thereby steel-making cost is improved.
And although conventional calcium treatment technology can make A1
2o
3with Mns inclusion modification, effectively solved continous casting sprue dross, and generated relatively little calcium aluminate and the CaS inclusion of steel quality harm, and calcium processing also has some improvement to the tissue of steel and performance.But calcium treatment technology is also with serving disadvantageous problem: calcium is dealt with improperly and easily made the erosive velocity at the mouth of a river accelerate, and causes molten steel to pollute; Low and the easy gathering of calcium aluminate fusing point, grow up, get rid of, once but be trapped in and in steel, just become oarse-grained inclusion; Indeformable after the common rolling of calcium aluminate inclusion, become point-like inclusion.
Therefore, develop low aluminium, low calcium series steel making deoxidant and there is very important effect.
Document number be CN90101571.7 Patent Application Publication a kind of magnalium of used as heat generating agent, its composition is (weight percent): in Al24～36% and Si5～7%, Re0.5～1% or Si5.5～7.5%, Mn2～3% or Mn4.5～6.5, Re0.5～1%, Cu3～7%, at least and one group at the most, surplus is Mg and inevitable impurity.Document number be CN201110399553.5 Patent Application Publication a kind of magnalium and preparation method thereof, the composition of described alloy and mass percent thereof are: magnesium 60%～80%, aluminium 8%～10%, manganese 0.5%～2.0%, lanthanum 0.1%～1.0%, cerium 0.1%～1.0%, praseodymium 0.05%～0.5%, yttrium 0.1%～1.0%, zinc 0.1%～0.5%, strontium 0.5%～2.0%, impurity element 0.001%～0.5%, its preparation process is for adopting shielding gas that the metal of above-mentioned each component is prepared into alloy in High Temperature Furnaces Heating Apparatus, wherein smelting temperature is 600 ℃～800 ℃, teeming temperature is 650 ℃～750 ℃.Document number be CN200710052635.6 Patent Application Publication its core alloy powder of a kind of magnesium-aluminum alloy core-spun yarn chemical composition be by mass percentage: Mg5～13%, Al11～14%, surplus is Fe and inevitable impurity.Document number be CN200610096511.3 Patent Application Publication a kind of rare-earth contained Mg-Al alloy and melting technology thereof, Al:1～6wt% in this alloy, Zn:0.6～2wt%, Ce:0.1～2wt%, Fe :≤0.010wt%, Ni:<0.001wt%.Its method for making is: first pure magnesium is put in crucible for smelting stove, be warming up to 700～750 ℃, then put into successively aluminium ingot and zinc ingot metal, at 690～740 ℃, add rare earth magnesium cerium master alloy, stir and standing 10～40 minutes, then at 680～740 ℃, pour into a mould, obtain ingot casting; Whole fusion process, adopts SF
6, CO
2and the mixed gas protected melt that forms of pressurized air.Document number be CN200910028340.4 Patent Application Publication a kind of magnalium and preparation method thereof, the quality percentage composition of this magnalium is: 7～10%Al, 0.5～2%Zn, 0.5～3%Sn, 0.05～3.5%Pb, all the other are Mg.The preparation method of this tough magnesium alloy: by the above-mentioned pure Al ingot preparing, Mg ingot, pure Sn bar, pure Pb piece, Zn ingot at N
2/ CO
2/ SF
6heat fused together in hybrid protection atmosphere, N in hybrid protection atmosphere
2, CO
2and SF
6volume ratio be 8: 16: 76.When temperature rises to 700～725 ℃, be incubated 4～8 minutes after the cooling tough magnesium alloy that obtains.
Summary of the invention
The object of the invention is to solve at least one in above-mentioned prior art problem.
One of object of the present invention is to provide a kind of magnesium base complex deoxidization alloy and the deoxidation in steel making method thereof of low aluminium, low calcium.
Another object of the present invention is to provide a kind of can avoid because forming bunch shape/strip A1 after steel-making aluminium deoxidation
2o
3be mingled with and affect deoxygenated alloy and the deoxidation in steel making method thereof of steel quality.
Another object of the present invention is to provide a kind of deoxygenated alloy and the deoxidation in steel making method thereof that can avoid causing easily stopping up because of calcium deoxidation the problems such as the mouth of a river.
An aspect of of the present present invention provides a kind of magnesium base complex deoxidization alloy.The composition of described deoxygenated alloy is by weight percentage by Al10%～25%, Mg45%～70%, and Ca10%～25%, Ba1%～5%, the Fe of surplus and other inevitable impurity form.
Another aspect of the present invention provides a kind of deoxidation in steel making method.Described deoxidation in steel making method comprises: adopt magnesium base complex deoxidization alloy as above to carry out deoxidation treatment to molten steel.
Compared with prior art, beneficial effect of the present invention comprises: when molten steel is carried out to deoxidation, have stronger sweetening power, the inclusion after deoxidation of molten steel can be converted into complex inclusion mostly, can effectively improve steel quality.
Embodiment
Hereinafter, in connection with exemplary embodiment, describe magnesium base complex deoxidization alloy of the present invention and deoxidation in steel making method in detail.
In one exemplary embodiment of the present invention, the composition of magnesium base complex deoxidization alloy is by weight percentage by Al10%～25%, Mg45%～70%, and Ca10%～25%, Ba1%～5%, the Fe of surplus and other inevitable impurity form.Preferably, the composition of this deoxygenated alloy can comprise by weight percentage: Al18%～23%, Mg50%～65%, Ca13%～21%, and Ba2%～4%.
For the ease of use and obtain good deoxidation effect when deoxidation operates, in the present invention, deoxygenated alloy can be made to the alloy block with 50～100mm granularity; Or, deoxygenated alloy first can be crushed to the granularity of 2～5mm, then carry out cored operation, make cored-wire.
In another exemplary embodiment of the present invention, deoxidation in steel making method comprises: adopt the magnesium base complex deoxidization alloy of composition as mentioned above to carry out deoxidation treatment to molten steel.Here, molten steel can be the molten steel after aluminium deoxidation or the molten steel after calcium deoxidation, but is not limited to this.The add-on of deoxygenated alloy can require to add according to molten steel composition and deoxidation.
In one exemplary embodiment of the present invention, deoxidation in steel making method can realize in the following manner: first described deoxygenated alloy is broken into the alloy block that granularity is 50～100mm, then in tapping process, after the 30s that taps, this alloy block is joined in ladle; Or first described deoxygenated alloy to be broken into granularity be the particle of 2～5mm and make cored-wire, then after finishing, tapping by feeding wire machine, described cored-wire is joined in molten steel.
Magnesium base complex deoxidization alloy of the present invention and deoxidation in steel making method have stronger sweetening power in to deoxidation of molten steel, and after deoxidation of molten steel, inclusion is converted into complex inclusion, wherein A1 mostly
2o
3inclusion mainly changes MgOA1 into
2o
3deng, FeS and MnS sulfides are mingled with complex sulfides such as being transformed into MnS, CaS and MgS and are mingled with, and effectively improve, improved steel quality, after solution steel-making aluminium deoxidation, can form bunch shape/strip A1
2o
3be mingled with, after calcium deoxidation, easily stop up the problems such as the mouth of a river.
Below in conjunction with concrete example, describe exemplary embodiment of the present invention in detail.
Example 1
In this example, the composition of magnesium base complex deoxidization alloy is by weight percentage: Al25%, and Mg50%, Ca19%, Ba5%, all the other are no more than 0.5% impurity for Fe and content.
This deoxygenated alloy is broken into the alloy block that granularity is 70～90mm left and right, in the tapping process of above-mentioned molten steel, after the 30s that taps, adds the alloy block of 4kg/tFe in ladle, molten steel is carried out deoxidation and inclusion is carried out to modification.
After testing, after this example deoxidation treatment, the oxygen level in molten steel is 182ppm, and desulfurization degree is 23%.
Example 2
In this example, the composition of magnesium base complex deoxidization alloy is by weight percentage: Al10%, and Mg70%, Ca10%%, Ba1%, all the other are no more than 1% impurity for Fe and content.
This deoxygenated alloy is broken into the particle that granularity is 3～4mm left and right and makes cored-wire through cored operation, after tapping finishes, by feeding wire machine, the cored-wire of 3kg/tFe is joined in molten steel, molten steel is carried out deoxidation and inclusion is carried out to modification.
After testing, after this example deoxidation treatment, the oxygen level in molten steel is 174ppm, and desulfurization degree is 26%.
Example 3
In this example, the composition of magnesium base complex deoxidization alloy is by weight percentage: Al23%, and Mg60%, Ca16%, and Ba4%, all the other are no more than 0.6% impurity for Fe and content.
This deoxygenated alloy is broken into the alloy block that granularity is 70～90mm left and right, in the tapping process of above-mentioned molten steel, after the 30s that taps, adds the alloy block of 3.6kg/tFe in ladle, molten steel is carried out deoxidation and inclusion is carried out to modification.
After testing, after this example deoxidation treatment, the oxygen level in molten steel is 166ppm, and desulfurization degree is 28%.
Steel-making of the present invention comprises by the advantage of deoxygenated alloy and method of deoxidation: can be when molten steel is carried out to deoxidation, have stronger sweetening power, for example, after deoxidation, oxygen level can arrive below 185ppm, desulfurization degree can reach more than 20%, can effectively improve steel quality.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skills should be clear, in the situation that do not depart from the spirit and scope of claim, can carry out various modifications to above-described embodiment.
Claims (8)
1. a magnesium base complex deoxidization alloy, is characterized in that, the composition of described deoxygenated alloy is by weight percentage by Al10%～25%, Mg45%～70%, and Ca10%～25%, Ba1%～5%, the Fe of surplus and other inevitable impurity form.
2. magnesium base complex deoxidization alloy according to claim 1, is characterized in that, the composition of described deoxygenated alloy comprises by weight percentage: Al13%～22%, Mg50%～65%, Ca13%～21%, and Ba2%～4%.
3. magnesium base complex deoxidization alloy according to claim 1, is characterized in that, described deoxygenated alloy is the alloy block with 50～100mm granularity.
4. magnesium base complex deoxidization alloy according to claim 1, is characterized in that, described deoxygenated alloy has the granularity of 2～5mm and is made into cored-wire.
5. a deoxidation in steel making method, is characterized in that, described deoxidation in steel making method comprises: adopt the magnesium base complex deoxidization alloy as described in any one in claim 1 to 4 to carry out deoxidation treatment to molten steel.
6. deoxidation in steel making method according to claim 5, is characterized in that, described deoxidation in steel making method is first broken into described deoxygenated alloy the alloy block that granularity is 50～100mm, then in tapping process, after the 30s that taps, this alloy block is joined in ladle.
7. deoxidation in steel making method according to claim 5, it is characterized in that, described deoxidation in steel making method is first broken into described deoxygenated alloy granularity to be the particle of 2～5mm and to make cored-wire, then after tapping finishes, by feeding wire machine, described cored-wire is joined in molten steel.
8. deoxidation in steel making method according to claim 5, is characterized in that, described molten steel is molten steel or the molten steel after calcium deoxidation after aluminium deoxidation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114686737A (en) * | 2022-04-09 | 2022-07-01 | 五台云海镁业有限公司 | High-quality magnesium-based master alloy and production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU194947B (en) * | 1984-10-19 | 1988-03-28 | Vasipari Kutato Fejleszto | Desulphurizing alloy containing magnesium foriron r iron-base melts |
| CN1097470A (en) * | 1993-07-13 | 1995-01-18 | 庄树田 | Magnesium-based alloy bar cladded by iron sheet and manufacture method thereof and purposes |
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| RU2228384C1 (en) * | 2002-12-24 | 2004-05-10 | ООО "Сорби стил" | Steel modifier |
| RU2228371C1 (en) * | 2002-12-24 | 2004-05-10 | ООО "Сорби стил" | Method of treatment of steel in ladle |
| RU2238983C2 (en) * | 2002-12-24 | 2004-10-27 | ООО "Сорби стил" | Material for microalloying using a furnace-ladle installation |
-
2013
- 2013-11-11 CN CN201310556397.8A patent/CN103571997B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU194947B (en) * | 1984-10-19 | 1988-03-28 | Vasipari Kutato Fejleszto | Desulphurizing alloy containing magnesium foriron r iron-base melts |
| CN1097470A (en) * | 1993-07-13 | 1995-01-18 | 庄树田 | Magnesium-based alloy bar cladded by iron sheet and manufacture method thereof and purposes |
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| RU2228384C1 (en) * | 2002-12-24 | 2004-05-10 | ООО "Сорби стил" | Steel modifier |
| RU2228371C1 (en) * | 2002-12-24 | 2004-05-10 | ООО "Сорби стил" | Method of treatment of steel in ladle |
| RU2238983C2 (en) * | 2002-12-24 | 2004-10-27 | ООО "Сорби стил" | Material for microalloying using a furnace-ladle installation |
Non-Patent Citations (2)
| Title |
|---|
| 孙培林等: "《高等专科学校教学用书 电炉炼钢学》", 31 October 1992, article "复合脱氧剂", pages: 69-70 * |
| 王厚昕: "含钡、镁新型炼钢脱氧剂的开发研究", 《万方学位论文数据库》, 10 August 2004 (2004-08-10), pages 54 - 55 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114686737A (en) * | 2022-04-09 | 2022-07-01 | 五台云海镁业有限公司 | High-quality magnesium-based master alloy and production method thereof |
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