CN1183262C - Silicon barium calcium magnesium iron alloy used for steelmaking deoxygenation - Google Patents
Silicon barium calcium magnesium iron alloy used for steelmaking deoxygenation Download PDFInfo
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- CN1183262C CN1183262C CNB031114369A CN03111436A CN1183262C CN 1183262 C CN1183262 C CN 1183262C CN B031114369 A CNB031114369 A CN B031114369A CN 03111436 A CN03111436 A CN 03111436A CN 1183262 C CN1183262 C CN 1183262C
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- steel
- alloy
- deoxidation
- iron alloy
- magnesium iron
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Abstract
The present invention relates to a Si-Ba-Ca-Mg-Fe alloy for the deoxidation of steel making. The Si-Ba-Ca-Mg-Fe alloy for the deoxidation of steel making is characterized in that the Si-Ba-Ca-Mg-Fe alloy for the deoxidation of steel making is prepared from the chemical components by the following weight percentage: 40 to 60% of Si, 10 to 30% of Ba, 6 to 20% of Ca, 2 to 10% of Mg and Fe and inevitable impurities as the rest. The Si-Ba-Ca-Mg-Fe alloy is used for the final deoxidation of steel making, and the Si-Ba-Ca-Mg-Fe alloy can reduce the content of impurity in steel and enhance the impact toughness and the elongation rate of the steel.
Description
One, technical field
The present invention relates to iron alloy, particularly a kind of silicon-barium-calcium-magnesium iron alloy that is used for final deoxygenation of molten steel.
Two, background technology
At present, along with ferrous metallurgy uses continuous casting process, new requirement has been proposed the steel-making final deoxygenation.That uses for a long time contains aluminium composite deoxidant, because the AI2O3 fusing point height in its deoxidation products easily solidifies, often causes nozzle clogging, very unfavorable to continuous casting.For this reason, not aluminiferous composite deoxidant has appearred.A kind of not aluminiferous deoxidation in steel making Si-Ba-Mg-Fe alloy is disclosed as Chinese patent ZL99109706.8.It is the Si of 30-70% by weight ratio, the Ba of 10-30%, and the Mg of 2-15%, surplus is that Fe forms (containing a small amount of AI and Ca that is brought into by raw material during with mine heat furnace smelting in the composition).Though this composite deoxidant does not have aluminium, deoxidation products SiO2 is because fusing point and proportion are higher, and being mingled with of making that it forms in steel is also higher relatively, and be bigger to the comprehensive mechanical performance influence of steel; Especially in steel, can increase the fragility of steel because of silicon, the steel grade high to some toughness reguirements, often not ideal enough with this reductor deoxidation.
Three, summary of the invention
The purpose of this invention is to provide a kind of deoxidation in steel making silicon-barium-calcium-magnesium iron alloy.Can reduce inclusion content of steel with this alloy deoxidation, improve inclusion morphology, improve the toughness of steel.
Silicon-barium-calcium-magnesium iron alloy provided by the invention, its chemical component weight per-cent is: Si40-50%, Ba10-25%, Ca6-10%, Mg2-8%, surplus is Fe and unavoidable impurities.
Composite deoxidant of the present invention owing to increased calcium in composition, can make deoxidation products form and contain calcium-silicate, and fusing point and proportion reduce, and come-up enters in the slag easily, thereby reduces inclusion content of steel.Simultaneously, calcium also has oxide compound and sulfide inclusion form in the steel of improvement, improves the effect of steel inclusion nodularization rate, and to improving the comprehensive mechanical performance of steel, the impelling strength and the unit elongation that especially improve steel are very favourable.Because the avidity of calcium and oxygen and sulphur is all very strong, also can improve the deoxidation and the sweetening effectiveness of reductor behind the adding calcium.
The content of calcium is unsuitable too high and low excessively among the present invention, and calcium contents is lower than 6%, DeGrain; Surpass 20%, meaning is also little, and higher because of the vapour pressure of calcium, too much calcium is met the molten steel scaling loss that easily gasifies, and is inoperative, but also can cause the production scene smog pollution.
The preparation method of silicon-barium-calcium-magnesium iron alloy provided by the invention is: with silica, barite, Wingdale, wagnerite, iron filings is raw material, and coke is a reductive agent, by the required proportioning of carrying out of alloying constituent, makes with the hot stove reducing and smelting in ore deposit.
Four, embodiment
Embodiment
Press silica 85Kg, barite 50Kg, Wingdale 18Kg, wagnerite 40Kg, iron filings 4Kg, coke 88Kg, carry out proportioning raw materials, drop in the hot stove in ore deposit in batches, smelted 120 minutes under 1800 ℃ of temperature, making composition is Si50%, Ba25%, Ca10%, Mg8%, surplus is the silicon-barium-calcium-magnesium iron alloy of Fe and unavoidable impurities.
Above alloy is used for 120 tons of converter smelting 15# steel grades, carries out final deoxygenation, and the ton steel adds this alloy 1.3Kg, the comprehensive mechanical performance of steel such as following table:
| Standard | Yield-point (Kg/mm 2) be not less than | Tensile strength (Kg/mm 2) be not less than | Unit elongation δ % is not less than | [S] | [0] |
| GB | 23 | 38 | 27 | ||
| Background technology | 26 | 41 | 29 | ＜0.03％ | 70ppm |
| This alloy | 27 | 41 | 31 | ＜0.03％ | 60ppm |
Claims (1)
1, a kind of silicon-barium-calcium-magnesium iron alloy that is used for deoxidation in steel making is characterized in that, its chemical component weight per-cent is: Si40-50%, and Ba10-25%, Ca6-10%, Mg2-8%, surplus is Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031114369A CN1183262C (en) | 2003-04-14 | 2003-04-14 | Silicon barium calcium magnesium iron alloy used for steelmaking deoxygenation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031114369A CN1183262C (en) | 2003-04-14 | 2003-04-14 | Silicon barium calcium magnesium iron alloy used for steelmaking deoxygenation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1442493A CN1442493A (en) | 2003-09-17 |
| CN1183262C true CN1183262C (en) | 2005-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031114369A Expired - Fee Related CN1183262C (en) | 2003-04-14 | 2003-04-14 | Silicon barium calcium magnesium iron alloy used for steelmaking deoxygenation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183262C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408700C (en) * | 2005-07-01 | 2008-08-06 | 刘治国 | Silicon barium calcium manganese magnesium iron alloy and its preparation method |
| CN100462445C (en) * | 2006-05-18 | 2009-02-18 | 北京世纪锦鸿科贸有限责任公司 | Low-aluminium composite deoxidant containing magnesium |
| CN102409139A (en) * | 2011-11-26 | 2012-04-11 | 内蒙古包钢钢联股份有限公司 | Steelmaking refining and deoxygenation process |
-
2003
- 2003-04-14 CN CNB031114369A patent/CN1183262C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1442493A (en) | 2003-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BENXI METALLURGY GROUP CO., LTD. Free format text: FORMER NAME OR ADDRESS: GUO QINGCHENG |
|
| CP03 | Change of name, title or address |
Address after: 117100 Changjiang Road in Liaoning province Benxi County town No. 549 Benxi Smelter Group Co. Ltd. Patentee after: BENXI SMELTERY GROUP Co.,Ltd. Address before: 117100 Liaoning County of Benxi Province town Benxi second smelting plant Patentee before: Guo Qingcheng |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |