CN1267567C - High-aluminium alloy and its prepn process - Google Patents
High-aluminium alloy and its prepn process Download PDFInfo
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- CN1267567C CN1267567C CN 02136397 CN02136397A CN1267567C CN 1267567 C CN1267567 C CN 1267567C CN 02136397 CN02136397 CN 02136397 CN 02136397 A CN02136397 A CN 02136397A CN 1267567 C CN1267567 C CN 1267567C
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Abstract
The present invention relates to high-aluminium alloy and a preparing method thereof. The high-aluminium alloy belongs to the field of intermediate alloy used during a steel making process and particularly relates to the technology of deoxidizing molten steel and compounding the aluminum element. Due to the characteristics of technology during a steel making process, steel material is partially oxidized in the melting period, and after slag is melted, the content of oxygen in molten steel can also be increased. In general, molten steel needs to be deoxidized in order to guarantee the contents of alloy elements in steel. Pure aluminium is generally used for deoxidation through the ages, and the specific weight of pure aluminium is smaller than that of molten steel, so that the consumption of aluminum is high. Not only is the steel making cost increased, but also aluminum resources are wasted, and simultaneously, the aluminum element content in steel is also difficult to control. The present invention provides intermediate alloy with a high specific weight between the specific weights of iron and aluminum, which not only can replace pure aluminium to be used for deoxidizing molten steel, but also can be used for compounding the aluminum element in steel. The yield is stable, and the total aluminum consumption is much lower than that of pure aluminium, so that resources are saved.
Description
Technical field
The high-aluminium alloy product belongs to the master alloy category of steel or iron, is that steelmaking process is used for the deoxidation product of deoxidation of molten steel and the master alloy of allocating into as the steel aluminium element, and its preparation method belongs to the ferroalloy smelting technical field.
Background technology
As everyone knows, steel-making is the oxidation-reduction reaction under the high temperature.The steel material has oxidation in various degree in melting process, the oxidation that the oxygen level in the steel also can the invar material simultaneously and sharply raising, make refining process allocate a large amount of losses of alloying element meeting in the steel into, not only strengthened steel-making cost, waste resource, the simultaneously also excessive direct quality product that influences of oxygen level in the invar.For a long time, in order to reduce the oxygen level in the steel, generally adopt the fine aluminium deoxidation, the allocating into also to adopt of aluminium element adds fine aluminium, and since the light specific gravity of fine aluminium be difficult for after the adding entering in the steel, most of meeting reduce economic benefit in the molten steel surface scaling loss, and the aluminium content in the steel also is difficult to control.For this reason, both at home and abroad the relevant expert begins one's study the complex deoxidization product novel, for 92111900.3 " silicon-aluminum-barium-strontium-iron alloys " that provided number are provided Chinese patent application; 92107299.6 " the aluminium manganese composite deoxidants " that provided number are provided Chinese patent application; The USSR (Union of Soviet Socialist Republics) application number is " steel-deoxidizing interfused alloy " that SU418549 provided or the like.All these products are all because of containing the silicon or the manganese of more amount, so in use be subjected to many restrictions in its composition.In order to overcome these all deficiencies, we have begun the research of high-aluminium alloy and preparation method thereof.Purpose is for STEELMAKING PRODUCTION provides a kind of higher deoxidizing capacity that both had, can make in the steel aluminium element again and allocate into, and cheap, save resource, the deoxidation master alloy product of new generation that reduces cost is to solve the deficiencies in the prior art.
Summary of the invention
The scope of its composition weight percent of high-aluminium alloy of the present invention is (%):
Aluminium: 55-65 iron: 43-32 carbon :≤0.15
Silicon :≤1.5 bronze medals :≤0.05 impurity: surplus.
Its typical weight percentage ranges of high-aluminium alloy of the present invention is (%):
Aluminium: 57.5-60.5 iron: 40.5-37.5 carbon :≤0.05
Silicon :≤0.3 bronze medal :≤0.05 impurity: surplus.
The preparation method of high-aluminium alloy of the present invention is (1) batching (2) fusing (3) casting successively:
Wherein batching is conventional distribution, and fusing comprises following seven steps:
(1) the steel material is dropped into the intermediate frequency furnace fusing;
(2) add oxygenant;
(3) add reductive agent;
(4) add lime 70%, the basic slag that fluorite 30% weight percent is formed carries out deoxidation, degass and impurity;
(5) add fluorite powder 40% again after skimming, the basic slag slag making that industrial table salt 60% weight percent is formed;
(6) drop into preheating aluminium material;
(7) stir, remove slag;
Casting be meant high aluminum solutions at the mold center with greater than 100 ℃ of/second speed cooled and solidified.
Oxygenant in the melting process refers to oxygen or iron scale.
Reductive agent in the melting process refers to silico-calcium, ferrosilicon, carbide of calcium or fine aluminium.
Adopt high-aluminium alloy that preparation method of the present invention produces through actual uses of steel mill, have that deoxidation effect is good, recovery rate is stablized, the economic benefit advantages of higher, the while can be saved bauxite resource in a large number.
Embodiment
Processing condition adopt 1000kg intermediate frequency coreless induction furnace, and its standard capacity is 1000kg, peak power 400kw.
(1) batching: every stove is measured by norm and is 600kg, pure material formula:
Steel: 260kg recovery rate: 97%
Aluminium: 366kg recovery rate: 95%
(2) melting:
1. steel material 260kg is dropped into intermediate frequency furnace, energising heating, the fusing of steel material.
2. add ferric oxide 6kg or aerating oxygen 70kg, carry out molten steel decarburization, desiliconization, the interior carbon content of molten steel is reduced to below 0.1%, silicone content is below 0.05%.
3. add carbide of calcium 6kg and carry out deoxidation of molten steel; Time is 2-3 minute;
4. add slag charge: lime 7kg, fluorite 3kg makes basic slag, sprinkles the 300g ferrosilicon powder after the slagging on the top of the slag or the silicon ground caustic carries out diffusive deoxidation, adsorbs impurity and gas in the steel simultaneously; About 5-6 of time minute.
5. take off district's reducing slag, add 40 order fluorite powder 1.6kg, the mixing slag charge of dehydration industrial table salt 2.4kg.
6. add and be preheated to 200～300 ℃ aluminium material; About about 5 minutes of fusing time.
7. fully stir, and drag for the liquid level scum silica frost;
8. treat high alumina solution temperature to 1230 ℃ about-1260 ℃, prepare casting;
(3) casting:
Water mold and adopt the cast alloy iron mould, the mold inner chamber shows the platform cone, diameter 32mm, and high 22mm, and be preheated to 250 ℃-300 ℃.High-aluminium alloy solution with greater than the cooling of 100 ℃/second speed, crystallization, adopts non-open type casting in mold, when the high-aluminium alloy temperature is cooled to 250 ℃ of-350 ℃ of left and right sides, can unpacks and cool off in air.
By the high-aluminium alloy that above example is smelted, the weight percent of its aluminium is at 57.5%-60.5%, carbon≤0.05, and silicon≤0.3, copper≤0.05, surplus is iron and other trace element.
Claims (3)
1, a kind of aluminium alloy is characterized in that, main chemical has aluminium, iron and small amount of carbon, silicon, copper and other trace impurities, and it is (%) that its weight percent is formed:
Aluminium: 55-65 iron: 43-32 carbon :≤0.15
Silicon :≤1.5 bronze medals :≤0.05 impurity: surplus.
According to the described aluminium alloy of claim 1, it is characterized in that 2, it is (%) that optimum weight per-cent is formed:
Aluminium: 57.5-60.5 iron: 40.5-37.5 carbon :≤0.05
Silicon :≤0.3 bronze medal :≤0.05 impurity: surplus.
According to the preparation method of claim 1 or 2 described aluminium alloys, it is characterized in that 3, the preparation method comprises batching, melting, casting successively:
(1) the steel material is dropped into the intermediate frequency furnace fusing;
(2) add oxygenant: oxygen;
(3) add reductive agent; Carbide of calcium;
(4) basic slag that adds lime 70%, fluorite 30% weight percent composition carries out deoxidation, degass and impurity;
(5) add the basic slag slag making that fluorite powder 40%, industrial table salt 60% weight percent are formed after skimming again;
(6) drop into preheating aluminium material;
(7) stir, remove slag;
(8) casting;
The setting rate of aluminium alloy solution in mold of casting is greater than 100 ℃/second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136397 CN1267567C (en) | 2002-08-06 | 2002-08-06 | High-aluminium alloy and its prepn process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136397 CN1267567C (en) | 2002-08-06 | 2002-08-06 | High-aluminium alloy and its prepn process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1398991A CN1398991A (en) | 2003-02-26 |
| CN1267567C true CN1267567C (en) | 2006-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02136397 Expired - Fee Related CN1267567C (en) | 2002-08-06 | 2002-08-06 | High-aluminium alloy and its prepn process |
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| CN (1) | CN1267567C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734201B (en) * | 2016-04-01 | 2018-05-25 | 武汉宏钢晟科技发展有限公司 | A kind of alfer, preparation method and the usage |
| CN105986137B (en) * | 2016-06-15 | 2018-08-14 | 贵州铝城铝业原材料研究发展有限公司 | A kind of technique and intermediate producing alloy aluminum |
| CN109136718A (en) * | 2018-07-27 | 2019-01-04 | 含山县林宏铸造厂 | A kind of anti-aging high life type mental section |
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2002
- 2002-08-06 CN CN 02136397 patent/CN1267567C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1398991A (en) | 2003-02-26 |
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Granted publication date: 20060802 Termination date: 20110806 |