CN103710583A - Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof - Google Patents
Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof Download PDFInfo
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- CN103710583A CN103710583A CN201310755247.XA CN201310755247A CN103710583A CN 103710583 A CN103710583 A CN 103710583A CN 201310755247 A CN201310755247 A CN 201310755247A CN 103710583 A CN103710583 A CN 103710583A
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- yttrium
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Abstract
The invention relates to a magnesium-alumium-iron alloy for a desulfurizing and deoxidizing agent and a preparation method of the magnesium-alumium-iron alloy. The magnesium-alumium-iron alloy is composed of the following components by weight percentage: 5-10% of magnesium, 40-50% of alumium, 3-5% of calcium, 0.001-0.003% of yttrium and the balance of iron. The alloy is used as the final desulfurizing and deoxidizing agent for liquid steel, and convenient to use as being directly put in the liquid steel. As the specific weight and the melting point of alloy are greater than those of the single substance magnesium and pure alumium, the alloy in longer in time of staying in the liquid steel in during deoxidization, thus the utilization rate is higher and the cost is lower.
Description
Technical field
The invention belongs to metal material field, refer in field of steel-making for magnesia-alumina-ferroalloy and preparation method for desulfating and deoxidation agent.
Background technology
Now also more and more higher to requirements such as steel grade purity, uniformity coefficient, grain fineness, require to reduce production costs simultaneously, the over-all properties of steel also increases thereupon.Fine aluminium plays tranquillizer effect in deoxidation process, and aluminium and affinity for oxygen are very strong, and deoxidation efficiency is high, by people's widespread use.But, use fine aluminium or ferroaluminium deoxidation all to have some shortcomings, from physics aspect, aluminium fusing point is low, and density ratio molten steel density is little, in molten steel, easily floats, and scaling loss is larger, and than composite alloy deoxidation, fine aluminium deoxidation utilization ratio is low; From chemical aspect, one, the deoxidation products aluminium sesquioxide in steel is chain, the chain more aluminium sesquioxide particle on long-chain is more intensive, and its plasticity-is very poor, thereby affects the mechanical property of steel; Two, aluminium sesquioxide fusing point, between 2020 ℃～2050 ℃, easily condenses into willow when pouring molten steel, stops up the mouth of a river, is unfavorable for molten steel casting; Three, the reaction product of aluminium deoxidation and remain in the aluminium in steel, often causes the creep brittleness of high temperature steel, reduces the hot strength of steel.So use fine aluminium or ferro-aluminum, do the more and more difficult demand that meets deoxidation in steel making of reductor.
Summary of the invention
The present invention seeks to the magnesia-alumina-ferroalloy that development and operation is easy, fast simple and the magnesium rate of recovery is high, and can meet under commercial production conditions, produce magnesia-alumina-ferroalloy.
The present invention is achieved by the following technical solutions:
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, it forms be the magnesium of 5-10% by weight percentage, the calcium of the aluminium of 40-50%, 3-5%, the yttrium of 0.001-0.003%, surplus is iron.
Further, desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 8% magnesium, 42% aluminium, 3.5% calcium, 0.0015% yttrium by weight percentage, surplus is iron.
Desulfating and deoxidation agent by magnesia-alumina-ferroalloy preparation method is:
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
The invention has the beneficial effects as follows:
This kind of alloy can be used as the whole desulfating and deoxidation agent of molten steel, easy to use, directly drops in molten steel.Because proportion, the fusing point of alloy ratio simple substance magnesium and fine aluminium are large, the time stopping in molten steel during alloy deoxidation is longer, and utilization ratio is higher, and cost is also low.
Embodiment
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, it forms be the magnesium of 5-10% by weight percentage, the calcium of the aluminium of 40-50%, 3-5%, the yttrium of 0.001-0.003%, surplus is iron.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
Its preparation method is:
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Embodiment 1
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 10% magnesium, 50% aluminium, 5% calcium, 0.003% yttrium by weight percentage, surplus is iron.
Embodiment 2
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 5% magnesium, 40% aluminium, 3% calcium, 0.001% yttrium by weight percentage, surplus is iron.
Embodiment 3
A desulfating and deoxidation agent magnesia-alumina-ferroalloy, its composition is 8% magnesium, 42% aluminium, 3.5% calcium, 0.0015% yttrium by weight percentage, surplus is iron.
Claims (4)
1. a desulfating and deoxidation agent magnesia-alumina-ferroalloy, is characterized in that: it forms by weight percentage for the aluminium of the magnesium of 5-10%, 40-50%, the yttrium of the calcium of 3-5%, 0.001-0.003%, and surplus is iron.
2. desulfating and deoxidation agent magnesia-alumina-ferroalloy according to claim 1, is characterized in that: its composition is 8% magnesium, 42% aluminium, 3.5% calcium, 0.0015% yttrium by weight percentage, and surplus is iron.
3. a desulfating and deoxidation agent magnesia-alumina-ferroalloy preparation method, is characterized in that:
What smelting adopted is induction furnace, first in the bottom of induction furnace, adds 30% of whole alumiunum amount; Then magnesium ingot is all put into induction furnace; Add again remaining aluminium block, finally add whole metallic irons or steel scrap;
During heating, originally press the speed of 30～50 ℃/min, when approaching 700 ℃, adjust temperature rise rate, with 10～30 ℃/min of temperature rise rates, rise to 900 ℃, skin temperature is adjusted temperature rise rate again after reaching 900 ℃, with the temperature rise rate of 1～10 ℃/min, heat up, until metallic iron or steel scrap, aluminium block and magnesium ingot all dissolve, final steel liquid temp must not be greater than 1250 ℃;
Add calcium oxide and yttrium iron alloy, tapping casting after rear constant temperature 5-10 minute, and cooling fast, speed of cooling is not less than 15 ℃/sec.
Described yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
4. desulfating and deoxidation agent magnesia-alumina-ferroalloy preparation method according to claim 3, is characterized in that: yttrium is to add in yttrium iron alloy mode, and wherein, by weight percentage, yttrium accounts for the 5-20% of yttrium iron alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310755247.XA CN103710583A (en) | 2013-12-27 | 2013-12-27 | Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof |
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| CN201310755247.XA CN103710583A (en) | 2013-12-27 | 2013-12-27 | Magnesium-alumium-iron alloy for desulfurizing and deoxidizing agent and preparation method thereof |
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| US4004919A (en) * | 1974-08-22 | 1977-01-25 | Molycorp, Inc. | Method and apparatus for treating metal |
| JPS55131114A (en) * | 1979-03-29 | 1980-10-11 | Toyota Motor Corp | Additive for cast iron |
| EP0724018A1 (en) * | 1995-01-26 | 1996-07-31 | DEUMU Deutsche Erz- und Metall-Union GmbH | Agent for desulphurisation of hot iron melts |
| KR20010074045A (en) * | 2000-01-13 | 2001-08-04 | 남철우 | Method for manufacturing composite deoxidizer of molten steel and the composite deoxidizer by using the mothod thereof |
| CN101020942A (en) * | 2007-03-12 | 2007-08-22 | 邹杰 | Molten steel deoxygenating agent and its prepn |
| CN101092657A (en) * | 2007-07-20 | 2007-12-26 | 谢应凯 | Rare earth aluminum based composite alloy in use for steel making |
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| CN101435005A (en) * | 2007-11-15 | 2009-05-20 | 杨军 | Low silicon aluminum-iron alloy |
| CN101705334A (en) * | 2009-11-13 | 2010-05-12 | 江苏大学 | Aluminum-calcium-magnesium-cerium composite alloy used for strong desulfurization, final desoxidation, and quenching and tempering of liquid steel |
| CN103741020A (en) * | 2013-12-27 | 2014-04-23 | 姚芸 | Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent |
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2013
- 2013-12-27 CN CN201310755247.XA patent/CN103710583A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4004919A (en) * | 1974-08-22 | 1977-01-25 | Molycorp, Inc. | Method and apparatus for treating metal |
| JPS55131114A (en) * | 1979-03-29 | 1980-10-11 | Toyota Motor Corp | Additive for cast iron |
| EP0724018A1 (en) * | 1995-01-26 | 1996-07-31 | DEUMU Deutsche Erz- und Metall-Union GmbH | Agent for desulphurisation of hot iron melts |
| KR20010074045A (en) * | 2000-01-13 | 2001-08-04 | 남철우 | Method for manufacturing composite deoxidizer of molten steel and the composite deoxidizer by using the mothod thereof |
| CN101020942A (en) * | 2007-03-12 | 2007-08-22 | 邹杰 | Molten steel deoxygenating agent and its prepn |
| CN101092657A (en) * | 2007-07-20 | 2007-12-26 | 谢应凯 | Rare earth aluminum based composite alloy in use for steel making |
| CN101121952A (en) * | 2007-10-10 | 2008-02-13 | 本溪冶炼集团有限公司 | Micro-carbon, low-silicon, low-phosphor and low-sulphur aluminum-magnesium-calcium-iron alloy used for smelting steel and deoxidizing |
| CN101435005A (en) * | 2007-11-15 | 2009-05-20 | 杨军 | Low silicon aluminum-iron alloy |
| CN101705334A (en) * | 2009-11-13 | 2010-05-12 | 江苏大学 | Aluminum-calcium-magnesium-cerium composite alloy used for strong desulfurization, final desoxidation, and quenching and tempering of liquid steel |
| CN103741020A (en) * | 2013-12-27 | 2014-04-23 | 姚芸 | Preparation method of magnesium-aluminum-iron alloy for desulfurizing and deoxidizing agent |
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Application publication date: 20140409 |