CN1548561A - RESiMgCaFe alloy and its prepn - Google Patents
RESiMgCaFe alloy and its prepn Download PDFInfo
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- CN1548561A CN1548561A CNA031261655A CN03126165A CN1548561A CN 1548561 A CN1548561 A CN 1548561A CN A031261655 A CNA031261655 A CN A031261655A CN 03126165 A CN03126165 A CN 03126165A CN 1548561 A CN1548561 A CN 1548561A
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Abstract
The RESiMgCaFe alloy for ultimate deoxidation of molten steel has the chemical components of Si 45-60 wt%, Mg 5-12 wt%, RE 0.5-20 and Ca 3-10 wt% except Fe. Its preparation process includes adding the materials including silica, coke and iron filings into ore-smelting furnace for smelting of 110-120 min to produce ferrosilicon molt or block; adding the ferrosilicon molt or block into industrial frequency furnace and adding RE, magnesium ingot, silico calcium and iron for secondary smelting into the RESiMgCaFe alloy. Applying the said alloy can eliminate inclusion from steel fast, fine crystal grain, raising the rolling and casting efficiency, prevent scaling in the down spout of ladle, raise quality of steel product and lower production cost.
Description
Technical field
The present invention relates to a kind of alloy deoxidizer and preparation method thereof, particularly relate to a kind of rare earth silicon and magnesium Ca-Fe alloy that is used for final deoxygenation of molten steel and preparation method thereof.
Technical background
Enter 21st century, along with steel application energetically in every respect, Iron And Steel Industry also obtains fast development, and all trades and professions comprise Architectural Equipment, military installations, and is also more and more stricter to the requirement of various steel materials, is tending towards perfect more.This just impels Iron And Steel Industry will update its combination ingredient, molecular structure, cause alloy to carry out the Second Revolution, greatly develop to multielement and rare earth element, reduce the fussy degree and the alternative noble metal of operation process, reduce production costs, improve comprehensive properties of rolled steel, adapt to the demand of modern science and technology.
Summary of the invention
The object of the present invention is to provide a kind of rare earth silicon and magnesium Ca-Fe alloy that is used for final deoxygenation of molten steel, it can slough the inclusion in the molten steel, crystal grain thinning fast, simultaneously can improve rolling and casting efficiency, solve ladle nozzle dross phenomenon, improve steel product quality, reduce production costs.
The present invention also aims to provide a kind of method for preparing above-mentioned alloy.
For achieving the above object, the present invention adopts following technical scheme: rare earth silicon and magnesium Ca-Fe alloy, its Chemical Composition are (weight percent): Si:45%-60%, Mg:5%-12%, RE:0.5%-20%, Ca:3%-10%, iron surplus.
The preparation method of above-mentioned alloy is: with raw material by weight silica 100-110kg, steel cuttings 15-60kg, after the coke 45-55kg batch mixes, join continuously in the hot stove in ore deposit through 110-120 minute in batches, melting generates ferrosilicon 65-72# solution or bulk, liquation or silico briquette are joined in the main frequency furnace, and adding rare earth 5-20kg, magnesium ingot 6-10kg, silico-calcium 2-5kg, iron 25-30kg carry out secondary smelting, generate the rare earth silicon and magnesium Ca-Fe alloy.
The invention has the advantages that the adding of magnesium and rare earth, can substitute the adding of other rare metal, play the effect of deoxidation, desulfurizing and purifying molten steel, small amount of magnesium forms magnesium alloy, increases the mechanical property and the result of use of steel.
Embodiment
Press silica 100kg, steel cuttings 17kg, coke (C 〉=80%) 50kg mix, join continuously in the hot stove in 3500KVA ore deposit in batches and smelted 120 minutes, be smelt the 72# ferrosilicon, ferrosilicon solution or silico briquette (40 * 40 * 50) are joined in the main frequency furnace, (by per hundred kilograms of composition charge calculation) adds rare earth 5kg, silico-calcium 2kg, ferrosilicon 60kg, magnesium ingot 6kg, steel scrap 25kg carries out secondary smelting, the final rare earth silicon and magnesium Ca-Fe alloy that generates, its Chemical Composition is: RE:1.5%, Si:56%, Mg:5%, Ca:4%, iron surplus, with this alloy steel is wrapped interior final deoxygenation, its add-on is 2500 gram/tons, and oxygen content in steel is 0.0095% after tested, the foreign material total amount is 0.0097% in the steel, can improve the mechanical property and the anticorrosion shock resistance of steel, reduce steel product cost, and the steel mechanical property all meets national standard.
Claims (2)
1, the rare earth silicon and magnesium Ca-Fe alloy is characterized in that, its Chemical Composition is (weight percent):
Si:45%-60%, Mg:5%-12%, RE:0.5%-20%, Ca:3%-10%, iron surplus.
2, a kind of method for preparing the described alloy of claim 1, it is characterized in that, with raw material by weight silica 100-110kg, steel cuttings 15-60kg after the coke 45-55kg batch mixes, joins in the hot stove in ore deposit through 110-120 minute in batches continuously, melting generates ferrosilicon 65-72# solution or bulk, liquation or silico briquette are joined in the main frequency furnace, and adding rare earth 5-20kg, magnesium ingot 6-10kg, silico-calcium 2-5kg, iron 25-30kg carry out secondary smelting, generate the rare earth silicon and magnesium Ca-Fe alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031261655A CN1548561A (en) | 2003-05-14 | 2003-05-14 | RESiMgCaFe alloy and its prepn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031261655A CN1548561A (en) | 2003-05-14 | 2003-05-14 | RESiMgCaFe alloy and its prepn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1548561A true CN1548561A (en) | 2004-11-24 |
Family
ID=34321885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031261655A Pending CN1548561A (en) | 2003-05-14 | 2003-05-14 | RESiMgCaFe alloy and its prepn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1548561A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888492A (en) * | 2012-10-10 | 2013-01-23 | 中国科学院金属研究所 | Si-Ca-Al-Mg-RE (rare earth) composite deoxidizer and preparation method thereof |
| CN112322905A (en) * | 2020-10-27 | 2021-02-05 | 河南中原特钢装备制造有限公司 | Rare earth deoxidizer for low-aluminum steel electroslag and preparation method thereof |
-
2003
- 2003-05-14 CN CNA031261655A patent/CN1548561A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888492A (en) * | 2012-10-10 | 2013-01-23 | 中国科学院金属研究所 | Si-Ca-Al-Mg-RE (rare earth) composite deoxidizer and preparation method thereof |
| CN102888492B (en) * | 2012-10-10 | 2013-09-18 | 中国科学院金属研究所 | Si-Ca-Al-Mg-RE (rare earth) composite deoxidizer and preparation method thereof |
| CN112322905A (en) * | 2020-10-27 | 2021-02-05 | 河南中原特钢装备制造有限公司 | Rare earth deoxidizer for low-aluminum steel electroslag and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |