CN104313242A - Deoxidant used for steelmaking and preparation method thereof - Google Patents
Deoxidant used for steelmaking and preparation method thereof Download PDFInfo
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- CN104313242A CN104313242A CN201410579325.XA CN201410579325A CN104313242A CN 104313242 A CN104313242 A CN 104313242A CN 201410579325 A CN201410579325 A CN 201410579325A CN 104313242 A CN104313242 A CN 104313242A
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- deoxidant
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Abstract
The invention relates to a deoxidant used for steelmaking and a preparation method thereof. The deoxidant comprises the following components by weight percent: 25-35% of magnesium, 35-45% of aluminium, 0.3-0.5% of barium, 0.1-0.3% of sodium and the balance of iron. The deoxidant and the preparation method have the beneficial effects that by virtue of the powder metallurgy technology, and the problem of low solubility of magnesium relative to iron is solved, so that the loss on ignition of magnesium is reduced, the content of magnesium in an alloy is increased, the additive amount of the deoxidant is reduced and the production cost is reduced.
Description
Technical field
The invention belongs to metal material field, refer to a kind of deoxidant for steelmaking and preparation method thereof especially.
Background technology
In present steelmaking process, generally use fine aluminium reductor, this utilizes fine aluminium and affinity for oxygen is strong, deoxidation effectiveness is high and be used widely, but fine aluminium deoxidation also has some defects, be exactly that the fusing point of aluminium is low, density is little, float in molten steel, and the aluminium sesquioxide poor plasticity that produces of deoxidation and fusing point is high, be present in the thermal creep fragility that can cause steel in steel, reduce the hot strength of steel.
Also use magnesium to make reductor in existing reductor, because the character of magnesium is active, being more conducive to the combination of oxygen, be optimal reductor, but the density of magnesium is little, and the boiling point of magnesium is low, solubleness is low, is difficult to be dissolved in molten steel.
Existing technology has used and have been coordinated by aluminium and magnesium and to make Al-Mg-Fe alloy as reductor, but adopt common method for refining, because magnesium is relative to the low solubility of iron, therefore cause the scaling loss of magnesium too much when refining, the yield of obtained magnalium is low and cause cost high.
Summary of the invention
The object of this invention is to provide a kind of deoxidant for steelmaking and preparation method thereof, by the technical program, the problem that magnesium loss is large, cost is high that existing technology produces steel making deoxidant can be overcome.
A kind of deoxidant for steelmaking, its composition is that the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, surplus is iron by weight percentage.
Described preparation method is:
Batching, is, the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3% by weight percentage, and surplus is that iron carries out calculating batching;
Batch mixing, by above-mentioned each component not by grinding mechanical powdered, the median size of each powder is 20-60 micron; Above-mentioned powder is carried out batch mixing 30-60 minute in mixer;
Compacting, becomes base substrate by 350-500MPa pressure compacting 10-60 second in mould;
Fire, obtained base substrate is sintered 1-3 hour in stove at 650-700 DEG C, then with the speed of cooling of 15-25 DEG C/min, be cooled to room temperature and obtain alloy.
Described in sintering procedure, keep in stove firing under vacuum condition or vacuum nitrogen atmosphere.
The vacuum tightness of described vacuum nitrogen atmosphere is 500-3000Pa.
The present invention's beneficial effect is compared with the existing technology:
By powder metallurgy technology, overcome the problem that magnesium is low relative to iron solubility, and decrease magnesium water damage amount, improve the content of magnesium in alloy, reduce the addition of reductor, reduce production cost.
On the other hand, by the uniform velocity lowering the temperature, making the uniform texture of reductor, being conducive to the service efficiency improving reductor.
Embodiment
Describe technical scheme of the present invention in detail by the following examples, should be understood that, following embodiment only can be used for explaining the present invention and can not being interpreted as being limitation of the present invention.
A kind of deoxidant for steelmaking, its composition is that the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, surplus is iron by weight percentage.
Described preparation method is:
Batching, is, the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3% by weight percentage, and surplus is that iron carries out calculating batching;
Batch mixing, by above-mentioned each component not by grinding mechanical powdered, the median size of each powder is 20-60 micron; Above-mentioned powder is carried out batch mixing 30-60 minute in mixer;
Compacting, becomes base substrate by 350-500MPa pressure compacting 10-60 second in mould;
Fire, sinter 1-3 hour to be 500-3000Pa furnace temperature be 650-700 DEG C in maintenance vacuum condition or vacuum nitrogen atmosphere in stove by obtained base substrate, then with the speed of cooling of 15-25 DEG C/min, be cooled to room temperature and obtain alloy.
In following examples of the application, the preparation method of deoxidant for steelmaking is identical, the different compositions being only steel making deoxidant, therefore, below in an example, only propose the composition of steel making deoxidant, repeat specification is not carried out to the preparation method of steel making deoxidant.
Embodiment 1
A kind of deoxidant for steelmaking, its composition is that the magnesium of 25%, the aluminium of 35%, the barium of 0.3%, the sodium of 0.1%, surplus is iron by weight percentage.
Embodiment 2
A kind of deoxidant for steelmaking, its composition is that the magnesium of 35%, the aluminium of 45%, the barium of 0.5%, the sodium of 0.3%, surplus is iron by weight percentage.
Embodiment 3
A kind of deoxidant for steelmaking, its composition is that the magnesium of 30%, the aluminium of 38%, the barium of 0.35%, the sodium of 0.18%, surplus is iron by weight percentage.
Claims (4)
1. a deoxidant for steelmaking, is characterized in that: its composition is that the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3%, surplus is iron by weight percentage.
2. a deoxidant for steelmaking preparation method, is characterized in that:
Batching, is, the magnesium of 25-35%, the aluminium of 35-45%, the barium of 0.3-0.5%, the sodium of 0.1-0.3% by weight percentage, and surplus is that iron carries out calculating batching;
Batch mixing, by above-mentioned each component not by grinding mechanical powdered, the median size of each powder is 20-60 micron; Above-mentioned powder is carried out batch mixing 30-60 minute in mixer;
Compacting, becomes base substrate by 350-500MPa pressure compacting 10-60 second in mould;
Fire, obtained base substrate is sintered 1-3 hour in stove at 650-700 DEG C, then with the speed of cooling of 15-25 DEG C/min, be cooled to room temperature and obtain alloy.
3. deoxidant for steelmaking preparation method according to claim 2, is characterized in that: described in sintering procedure, keeps firing under vacuum condition or vacuum nitrogen atmosphere in stove.
4. deoxidant for steelmaking preparation method according to claim 3, is characterized in that: the vacuum tightness of described vacuum nitrogen atmosphere is 500-3000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579325.XA CN104313242A (en) | 2014-10-24 | 2014-10-24 | Deoxidant used for steelmaking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579325.XA CN104313242A (en) | 2014-10-24 | 2014-10-24 | Deoxidant used for steelmaking and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104313242A true CN104313242A (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410579325.XA Pending CN104313242A (en) | 2014-10-24 | 2014-10-24 | Deoxidant used for steelmaking and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294006A (en) * | 2014-10-24 | 2015-01-21 | 周欢 | Deoxidizing agent for steelmaking |
| CN104313243A (en) * | 2014-10-29 | 2015-01-28 | 杨雯雯 | Preparation method of desoxidant for steelmaking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| CN101135021A (en) * | 2007-06-21 | 2008-03-05 | 赵宇 | Aluminium magnesium ferroalloy for molten steel deoxidization desulfuration and alloying and preparation method thereof |
| CN101435008A (en) * | 2007-11-15 | 2009-05-20 | 关平宇 | Aluminum -magnesium-ferrum multicomponent alloy steel melting deoxidizing agent |
| CN102212649A (en) * | 2011-04-15 | 2011-10-12 | 谢廷声 | Iron alloy for silicon-based steel making composite deoxidizer and preparation method of iron alloy |
| CN102978340A (en) * | 2012-11-26 | 2013-03-20 | 张桂芬 | Steelmaking deoxidizing agent and preparation method thereof |
-
2014
- 2014-10-24 CN CN201410579325.XA patent/CN104313242A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316527A (en) * | 2001-03-21 | 2001-10-10 | 何丽华 | Al-Mg-Fe alloy for deoxidation and desulfurization in smelting steel |
| CN101135021A (en) * | 2007-06-21 | 2008-03-05 | 赵宇 | Aluminium magnesium ferroalloy for molten steel deoxidization desulfuration and alloying and preparation method thereof |
| CN101435008A (en) * | 2007-11-15 | 2009-05-20 | 关平宇 | Aluminum -magnesium-ferrum multicomponent alloy steel melting deoxidizing agent |
| CN102212649A (en) * | 2011-04-15 | 2011-10-12 | 谢廷声 | Iron alloy for silicon-based steel making composite deoxidizer and preparation method of iron alloy |
| CN102978340A (en) * | 2012-11-26 | 2013-03-20 | 张桂芬 | Steelmaking deoxidizing agent and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294006A (en) * | 2014-10-24 | 2015-01-21 | 周欢 | Deoxidizing agent for steelmaking |
| CN104313243A (en) * | 2014-10-29 | 2015-01-28 | 杨雯雯 | Preparation method of desoxidant for steelmaking |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20150128 |