CN114317888B - Rare earth core-spun yarn for aluminum killed steel and preparation method thereof - Google Patents
Rare earth core-spun yarn for aluminum killed steel and preparation method thereof Download PDFInfo
- Publication number
- CN114317888B CN114317888B CN202210070940.2A CN202210070940A CN114317888B CN 114317888 B CN114317888 B CN 114317888B CN 202210070940 A CN202210070940 A CN 202210070940A CN 114317888 B CN114317888 B CN 114317888B
- Authority
- CN
- China
- Prior art keywords
- rare earth
- aluminum
- powder
- metal
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a rare earth core-spun yarn for aluminum killed steel and a preparation method thereof. The invention has the advantages of convenient division and accurate measurement, and overcomes the defects of complicated sealing and inconvenient use that the rare earth metal needs to be soaked in oil or a special metal barrel and the like in the processes of storage and transportation. The preparation method provided by the invention has the characteristics of simplicity, practicability and convenience for large-scale production. The invention has positive significance for reducing the use cost and saving rare earth resources.
Description
Technical Field
The invention belongs to the field of ferrous metallurgy, and particularly relates to a rare earth core-spun yarn for aluminum killed steel and a preparation method thereof.
Background
At present, when the existing rare earth elements are used for alloying, changing the appearance of impurities and improving the performance of steel, the metal-state rare earth alloy or rare earth metal is usually adopted, on one hand, the preparation of the rare earth metal has the defects of complex smelting equipment, high smelting cost, environmental pollution and the like, and on the other hand, the defects of low yield of the rare earth metal and waste of rare earth metal or alloy rare earth exist because the rare earth metal or the rare earth alloy has small specific gravity, floats between molten steel in a steel ladle and liquid steel slag above the liquid level of the molten steel and the direct oxidation of the rare earth metal by the liquid steel slag is serious; although the rare earth metal powder and the rare earth metal wire used by the existing cored wire improve the rare earth alloying effect for molten steel, the rare earth metal powder is prepared by shaving (cutting) and passivating active rare earth elements (such as lanthanum and cerium) after a time-consuming, labor-consuming and complicated smelting link is needed to obtain a metal rare earth metal or alloy block, and the potential safety hazards of complicated procedures, high smelting processing cost, metal powder explosion and the like in the rare earth powder processing process exist.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above-mentioned circumstances, the present invention provides a rare earth cored wire for aluminum killed steel and a method for making the same, which can utilize the excess (or rich) temperature of molten steel without special reduction smelting process, can directly use rare earth oxide to perform rare earth alloying on the molten steel, can absorb inclusions, and can improve the utilization efficiency of rare earth.
The technical scheme of the invention is as follows: the utility model provides a rare earth core-spun yarn for aluminium killed steel, including metal protection tube shell and the direct alloying material of tombarthite, its characterized in that: the cored wire for the aluminum killed steel is formed by sealing and coating a rare earth direct alloying material by a metal protection tube shell, wherein the mass content of rare earth oxide in the rare earth direct alloying material is 28-31%, the mass content of calcium oxide is 6-7%, the mass content of dodecacalcium heptaluminate is not more than 1%, and the balance is metal aluminum, the rare earth direct alloying material is a round bar-shaped rare earth aluminum core prepared by mixing, homogenizing and compacting rare earth aluminum granules and metal aluminum granules, the rare earth aluminum granules are rare earth aluminum granules prepared by mixing, homogenizing and compacting rare earth oxide powder, metal aluminum powder, calcium oxide powder and dodecacalcium heptaluminate powder, the granularity of the rare earth aluminum granules is not more than 3mm, the fineness of the rare earth oxide powder is not more than 0.15mm, the fineness of the metal aluminum powder is not more than 0.15mm, the fineness of the dodecacalcium heptaluminate powder is not more than 0.075mm, the granularity of the metal aluminum granules is not more than 3mm, and the ReO oxide in the rare earth aluminum granules is not more than 0.15mm 2 The ratio of the molar mass of the medium rare earth metal Re to the molar mass of the calcium oxide CaO is within a range of 1.50 to 1.51.
The direct rare earth alloying material comprises 60-66% by mass of rare earth oxide, 14-16.0% by mass of calcium oxide, not more than 3% by mass of dodecacalcium heptaluminate and the balance of metal aluminum, wherein the direct rare earth alloying material is a round strip-shaped rare earth aluminum core prepared by mixing, homogenizing and compacting rare earth aluminum granules, calcium oxide powder and dodecacalcium heptaluminate powder, the rare earth aluminum granules are rare earth aluminum compacted granules prepared by mixing, homogenizing and compacting rare earth oxide powder and metal aluminum powder and have the particle size of not more than 3mm, the fineness of the rare earth oxide powder is not more than 0.15mm, the fineness of the metal aluminum powder is not more than 0.5mm, the fineness of the calcium oxide powder is not more than 0.25mm, and the fineness of the heptaaluminum powder is not more than 0.25mmThe fineness of the dodecacalcium carbonate powder is not more than 0.075mm, and the rare earth oxide ReO in the rare earth aluminum granules 2 The ratio of the molar mass of the medium rare earth metal Re to the molar mass of the calcium oxide CaO is within the range of 1.50 to 1.51, and the rare earth oxide ReO 2 The molar mass ratio of the medium rare earth metal Re to Al is not more than 3.
The metal protection tube shell is a low-carbon steel protection tube shell, the wall thickness of the tube shell of the low-carbon steel protection tube shell is not more than 1.0mm, the outer diameter of the low-carbon steel protection tube shell is not more than 16mm, and the outer diameter of the homogeneous round bar is not more than the inner diameter of the low-carbon steel protection tube shell.
The trapping agent powder is one or more of dodecacalcium heptaluminate powder, anhydrous sodium chloride powder and anhydrous sodium borate powder, and the particle size of the trapping agent powder is not more than 0.075mm.
The preparation of the rare earth core-spun yarn for the aluminum killed steel comprises the following steps:
the method comprises the following steps: preparing rare earth oxide powder, metal aluminum powder, calcium oxide powder and dodecacalcium heptaluminate powder into rare earth aluminum homogeneous powder;
step two: compacting the rare earth aluminum homogeneous material into rare earth aluminum compact granules with the granularity not more than 5mm;
step three: mixing the rare earth aluminum dense granules and the metal aluminum granules together, and homogenizing to prepare an alloyed rare earth core material;
step four: the alloyed rare earth core material is compacted into a round bar-shaped rare earth aluminum core;
step five: coating the round strip-shaped rare earth aluminum core into a rare earth core solid blank tube by using a metal protective shell;
step six: respectively radially rolling and axially straightening to compact the rare earth core solid blank tube into a circular straight-strip-shaped rare earth core-spun yarn with the outer diameter not more than 16 mm.
The preparation of the rare earth core-spun yarn for the aluminum killed steel comprises the following steps:
the method comprises the following steps: mixing and homogenizing rare earth oxide powder and metal aluminum powder to prepare rare earth aluminum homogenized powder;
step two: densifying the homogeneous rare earth aluminum material into dense rare earth aluminum particles with the granularity not greater than 5mm;
step three: mixing the rare earth aluminum dense granules, calcium oxide powder and dodecacalcium heptaluminate powder, and homogenizing to prepare an alloyed rare earth core material;
step four: comprises a fourth step, a fifth step and a sixth step in the claim 5.
The beneficial effects of the invention are: the invention achieves the effect and the purpose of utilizing the surplus (or surplus) temperature of the molten steel without a special reduction smelting link and directly using the rare earth oxide to carry out rare earth alloying on the molten steel, avoids the defects of complicated working procedures, high smelting processing cost, potential safety hazards of metal powder explosion and the like in the rare earth powder processing process and the like in the existing rare earth alloying link of using metallic rare earth elements or alloys, adopts metallic aluminum as a reduction (or deoxidation) agent, and pertinently realizes the effects of providing rare earth metal components to the molten steel, removing inclusions and improving the performance of the molten steel when the rare earth for the aluminum killed steel is alloyed. The preparation method of the invention has the characteristics of simplicity, practicability and convenience for large-scale production. The invention has positive significance for reducing the alloying cost of the molten steel, improving the quality of the molten steel, improving the utilization efficiency of the rare earth and saving the rare earth resource.
Drawings
FIG. 1 is a schematic view of the densification principle of the rare earth aluminum densified pellet prepared by the present invention.
FIG. 2 is a schematic diagram of the method for preparing the round-bar-shaped rare earth aluminum core.
FIG. 3 is a schematic diagram of the present invention, which is a schematic diagram of a rare earth aluminum core coated with a metal sheath.
FIG. 4 is a schematic view of the principle of the direct alloying rare earth core material of the present invention coated with a metal sheath.
FIG. 5 is a schematic diagram of the method of the present invention for making a rare earth cored bar.
FIG. 6 is a schematic view of the radial rolling and densification of the rare earth core billet of the present invention.
FIG. 7 is a schematic illustration of the axial straightening and further densification of the rare earth core cane of the present invention.
Wherein: 1 is the mixing powder, 2 is the compaction roller, 3 is the direct alloying material of tombarthite, 4 is the closely knit material via hole of extrusion, 5 is closely knit material scraper, 6 is metal protection shell, 7 is metal protection shell cladding die cavity, 8 is the tombarthite aluminium core, 9 is the roll of rolling, 10 is radial closely knit roll, 11 is the axial roll of flare-outing.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the invention provides a rare earth core-spun wire for aluminum killed steel, which comprises a metal protection tube shell and a rare earth direct alloying material, and is characterized in that: the cored wire for the aluminum killed steel is formed by sealing and coating a rare earth direct alloying material by a metal protection tube shell, wherein the mass content of rare earth oxide in the rare earth direct alloying material is 28-31%, the mass content of calcium oxide is 6-7%, the mass content of dodecacalcium heptaluminate is not more than 1%, and the balance is metal aluminum, the rare earth direct alloying material is a round bar-shaped rare earth aluminum core prepared by mixing, homogenizing and compacting rare earth aluminum granules and metal aluminum granules, the rare earth aluminum granules are rare earth aluminum granules prepared by mixing, homogenizing and compacting rare earth oxide powder, metal aluminum powder, calcium oxide powder and dodecacalcium heptaluminate powder, the granularity of the rare earth aluminum granules is not more than 3mm, the fineness of the rare earth oxide powder is not more than 0.15mm, the fineness of the metal aluminum powder is not more than 0.15mm, the fineness of the dodecacalcium heptaluminate powder is not more than 0.075mm, the granularity of the metal aluminum granules is not more than 3mm, and the ReO oxide in the rare earth aluminum granules is not more than 0.15mm 2 The ratio of the molar mass of the medium rare earth metal Re to the molar mass of the calcium oxide CaO is within a range of 1.50 to 1.51.
The rare earth direct alloying material comprises 60-66% by mass of rare earth oxide, 14-16.0% by mass of calcium oxide, not more than 3% by mass of dodecacalcium heptaluminate and the balance of metallic aluminum, the rare earth direct alloying material is a round strip-shaped rare earth aluminum core prepared by mixing, homogenizing and compacting rare earth aluminum granules, calcium oxide powder and dodecacalcium heptaluminate powder, the rare earth aluminum granules are rare earth aluminum compacted granules prepared by mixing, homogenizing and compacting rare earth oxide powder and metallic aluminum powder, the particle size of the rare earth aluminum compacted granules is not more than 3mm, the fineness of the rare earth oxide powder is not more than 0.15mm, and the fineness of the metallic aluminum powder is not more than 05mm, the fineness of calcium oxide powder is not more than 0.25mm, the fineness of dodecacalcium heptaluminate powder is not more than 0.075mm, and the rare earth oxide ReO in the rare earth aluminum granules 2 The ratio of the molar mass of the medium rare earth metal Re to the molar mass of the calcium oxide CaO is within the range of 1.50 to 1.51, and the rare earth oxide ReO 2 The molar mass ratio of the medium rare earth metal Re to the Al is not more than 3.
The metal protection tube shell is a low-carbon steel protection tube shell, the wall thickness of the tube shell of the low-carbon steel protection tube shell is not more than 1.0mm, the outer diameter of the low-carbon steel protection tube shell is not more than 16mm, and the outer diameter of the homogeneous round bar is not more than the inner diameter of the low-carbon steel protection tube shell.
The trapping agent powder is one or more of dodecacalcium heptaluminate powder, anhydrous sodium chloride powder and anhydrous sodium borate powder, and the particle size of the trapping agent powder is not more than 0.075mm.
The preparation of the rare earth core-spun yarn for the aluminum killed steel comprises the following steps:
the method comprises the following steps: preparing rare earth oxide powder, metal aluminum powder, calcium oxide powder and dodecacalcium heptaluminate powder into rare earth aluminum homogeneous powder;
step two: compacting the rare earth aluminum homogeneous material into rare earth aluminum compact granules with the granularity not more than 5mm;
step three: mixing the rare earth aluminum dense granules and the metal aluminum granules together, and homogenizing to prepare an alloyed rare earth core material;
step four: densifying the alloyed rare earth core material into a round bar-shaped rare earth aluminum core;
step five: coating the round strip-shaped rare earth aluminum core into a rare earth core solid blank tube by using a metal protective shell;
step six: and respectively compacting the rare earth core solid blank tube into a circular straight-strip rare earth core-spun yarn with the outer diameter not more than 16mm by radial compaction and axial straightening.
The preparation of the rare earth core-spun yarn for the aluminum killed steel comprises the following steps:
the method comprises the following steps: mixing and homogenizing rare earth oxide powder and metal aluminum powder to prepare rare earth aluminum homogenized powder;
step two: densifying the homogeneous rare earth aluminum material into dense rare earth aluminum particles with the granularity not greater than 5mm;
step three: mixing the rare earth aluminum dense granules, calcium oxide powder and dodecacalcium heptaluminate powder, and homogenizing to prepare an alloyed rare earth core material;
step four: comprises the fourth step, the fifth step and the sixth step in the claim 5.
The first embodiment is as follows: when the rare earth alloying cored wire for the aluminum killed steel is prepared, 654kg of rare earth oxide ReO with the fineness (the maximum size of particles) of 0.14mm is prepared 2 Powder (ReO) 2 Representing rare earth oxides, in the present example one, cerium oxide and lanthanum oxide associated with rare earth oxides), 142kg of calcium oxide powder with a fineness of 0.25mm, 15kg of dodecacalcium heptaluminate (12 CaO 7 Al) with a fineness of 0.075mm 2 O 3 ) 189kg of metal aluminum powder with the fineness of 0.15mm is used for preparing a rare earth direct alloying material, rare earth oxide powder and the metal aluminum powder are mixed and homogenized to form rare earth aluminum homogeneous powder, then the rare earth aluminum homogeneous powder is compacted to form rare earth aluminum compact granules with the granularity of not more than 3mm (see a principle figure 1, the rare earth aluminum compact granules in the figure 1 are extruded by teeth of a compaction roller and then are granulated after being extruded through holes of the compact granules and are scraped by a scraper and are discharged from an inner cavity of a cylinder of the compaction roller), then the rare earth aluminum granules, calcium oxide powder and dodecacalcium heptaluminate powder are mixed, homogenized and compacted to form a round strip-shaped rare earth aluminum core (see a principle figure 2), the rare earth aluminum core is placed into a metal protection shell (strip) with a U-shaped section in a U-shaped metal protection shell coating die groove (see figure 3), the metal protection shell (strip) and the protection shell are synchronously moved along the horizontal direction to realize continuous coating, the metal protection shell (strip) with the U-shaped section on one side is folded by a folding roller and then folded and covered on the upper surface of the rare earth aluminum core, the metal protection shell (strip-shaped metal core is further folded and rolled into a round strip-shaped compact strip-shaped core-rolled steel billet with the outer diameter of not more than 16mm, and then the round core billet, and the round core billet is conveniently transported and the round core billet by a straight core-rolled and the compact core billet by a straight core-rolled steel billet. When the rare earth alloying cored wire for the aluminum killed steel of the invention is used for alloying molten steel (in the embodiment, the molten steel is low-carbon molten steel which is subjected to LF refining and aluminum deoxidation treatment, and the temperature of the molten steel is excessive), wire feeding is used for alloying the molten steelThe rare earth core-spun yarn is inserted into liquid molten steel of a ladle at a proper speed and length by a wire machine, the rare earth core-spun yarn (utilizing the excess temperature of the molten steel) is rapidly heated to the temperature of the molten steel in the molten steel, and the solid CeO can not be separated by pure metal Al under the condition that the temperature of the molten steel is 1650 DEG C 2 Reducing to metallic Ce, however, when the rare earth core-spun yarn contains CaO in a certain proportion, ceO 2 Al and CaO can spontaneously generate reduction reaction under good contact condition to generate calcium aluminate (greatly reducing chemical potential of reduction reaction product) and liquid or dissolved cerium metal (namely: 3 ReO) 2 +4Al +2CaO=[Ce]+2 CaO·Al 2 O 3 ) In the presence of molten steel, liquid cerium Ce is converted into dissolved cerium [ Ce ]]The concentration (activity and chemical potential) of the product of the reduction reaction is greatly reduced, the solid rare earth oxide in the rare earth cored wire can be completely reduced by (liquid) metallic aluminum at the temperature of 1650 ℃ and under the condition of molten steel, and after dodecacalcium heptaluminate is melted (the temperature of a melting interval of dodecacalcium heptaluminate is 1150 to 1280 ℃ is far lower than the temperature of the molten steel), the reaction product is prevented from being dispersed (keeping an aggregation state) in the rare earth cored wire due to the surface tension (bearing an aggregating agent or a trapping agent) of a liquid phase, so that the contact condition of the reaction is ensured, and the reaction product is easier to float and discharge from the molten steel. In the first embodiment, the rare earth oxide powder and the metal aluminum powder are first mixed, homogenized and densified to form the rare earth aluminum densified pellet, and then the rare earth aluminum pellet, the calcium oxide powder and the dodecacalcium heptaluminate powder are mixed, homogenized and densified to form the round-strip-shaped rare earth aluminum core, so that the contact condition of the metal aluminum powder and the rare earth oxide powder is improved, and the excessive consumption of calcium oxide (CaO. Al) generated by the reaction of the metal aluminum and the calcium oxide and generating calcium vapor is reduced 2 O 3 Insufficient), the small amount of calcium vapor generated by the reaction of the aluminum metal and the calcium oxide can improve the thermodynamic and kinetic conditions of the aluminum metal for reducing the rare earth oxide, in the first embodiment, the yield of the rare earth cored wire (converted into metal) is in the range of 74-86%, compared with the steel alloying by the conventional alloy block (such as rare earth alloy or rare earth metal block), the yield of the rare earth is obviously improved, and compared with the steel alloying by the conventional alloy block, the steel alloying by the conventional alloy blockThe inclusion content in the molten steel is equivalent, and the yield by using the rare earth metal wire is basically equivalent. Thus, the effect and the purpose of directly using rare earth oxide to carry out rare earth alloying on the molten steel with aluminum sedation without the link of smelting and preparing metallic rare earth are achieved, the total utilization efficiency of rare earth is improved, and the cost is reduced.
Example two: the invention prepares the rare earth deoxidation and alloying cored wire for the aluminum killed steel, firstly 300kg of rare earth oxide powder (CeO 2) with the fineness of 0.14mm, 65kg of calcium oxide powder with the fineness of 0.45mm, 9kg of dodecacalcium heptaluminate powder with the fineness of 0.075mm, 63kg of metal aluminum powder with the fineness of 0.15mm and 526kg of metal aluminum particles with the fineness of 2.0mm are prepared, firstly the rare earth oxide powder, the metal aluminum powder, the calcium oxide powder and the dodecacalcium heptaluminate powder are mixed and homogenized to form rare earth aluminum homogeneous powder, then the rare earth aluminum homogeneous powder is prepared into rare earth aluminum granules with the granularity of not more than 2.8mm on a double-roll extrusion compacting device (the principle is shown in figure 1), then the rare earth aluminum dense granules and the metal aluminum particles are mixed and homogenized to form the alloying rare earth core material, the subsequent steps are the same as the first embodiment, and the strip-shaped rare earth killed steel rare earth wire with the outer diameter of not more than 16mm can be wound into a round cored wire for convenient storage, transportation and use. When the rare earth alloying cored wire for the aluminum killed steel deoxidizes and alloys molten steel (the molten steel in the embodiment is low-carbon molten steel which is deoxidized after an electric furnace reduction period and has excessive molten steel temperature), the rare earth cored wire is inserted into liquid molten steel of a ladle at a proper speed and length by a wire feeding machine, and CeO is arranged in the rare earth cored wire 2 Al and CaO have good contact conditions, and can spontaneously generate reduction reaction (namely 3 ReO) 2 +4Al +2CaO=[Ce]+2CaO·Al 2 O 3 ) Calcium aluminate (CaO. Al) is generated 2 O 3 Can greatly reduce the chemical potential of a reduction reaction product) and liquid or dissolved cerium metal (the liquid cerium Ce metal is converted into the dissolved cerium [ Ce ] in the presence of molten steel]The activity and chemical potential of the reduction reaction product are greatly reduced), and the solid rare earth oxide in the rare earth core-spun yarn can be (liquid) coated with gold at 1650 ℃ and molten steelThe aluminum is completely reduced, the dodecacalcium heptaluminate is melted (the melting temperature of the dodecacalcium heptaluminate is far lower than the temperature of molten steel at 1150 to 1280 ℃) and the contact condition of the reaction is ensured by avoiding the dispersion (keeping the aggregation state) of the reaction product due to the surface tension (bearing the aggregation agent or the capture agent) of the liquid phase in the rare earth core-spun yarn, and the reaction product is easier to float and discharge from the molten steel. In the second embodiment, the reducing agents (aluminum powder and aluminum particles) in the rare earth direct alloying material are far greater than the amount of aluminum required for reducing the rare earth oxide, and when the aluminum metal is reduced into liquid rare earth metal or dissolved rare earth metal, the excess aluminum can deoxidize the molten steel or dissolve the molten steel into deoxidized elements of the molten steel, so that the molten steel is more thoroughly deoxidized, and the oxidation of the dissolved oxygen in the molten steel on the rare earth elements is further weakened, thereby increasing the yield of the rare earth. In the second embodiment, the rare earth oxide powder, the metallic aluminum powder, the calcium oxide powder, and the dodecacalcium heptaluminate powder are first mixed, homogenized, and compacted into the rare earth aluminum granules with the particle size not greater than 2.8mm, and then mixed with the metallic aluminum granules, homogenized and compacted, so as to improve the contact condition between the metallic aluminum powder and the rare earth oxide powder, reduce or avoid the calcium oxide steam consumption of calcium oxide generated by the direct reaction of the metallic aluminum and the calcium oxide to generate calcium aluminate (CaO. Al) 2 O 3 ) The defect that the yield of the rare earth in the second embodiment is in the range of 86-91 percent, compared with the steel deoxidation and alloying technology by using the conventional alloy block, the yield of the rare earth is obviously improved, and compared with the steel deoxidation by using the conventional alloy block, the inclusion content in the molten steel is obviously reduced, and the appearance is improved. In the second embodiment, the yield of rare earth is equal to and slightly superior to the yield of rare earth metal wire alloying. Thus, the effects and purposes of directly using rare earth oxide to carry out rare earth alloying on the aluminum killed molten steel and reducing inclusions in the steel without a step of smelting and preparing metallic rare earth are achieved, and the total utilization efficiency of the rare earth is improved.
The technical scheme, the first embodiment and the second embodiment show that the method achieves the effect and the purpose of performing rare earth alloying on the molten steel by utilizing the excess (or rich) temperature of the molten steel without a special reduction smelting link and directly using rare earth oxides, avoids the defects of complicated working procedures, high smelting processing cost, potential safety hazards of metal powder explosion and the like in the rare earth powder processing process and the like in the existing link of using metallic rare earth elements or alloys for rare earth alloying, and achieves the effects of providing rare earth metal components to the molten steel, removing inclusions and improving the performance of the molten steel during the rare earth alloying for the aluminum killed steel. The preparation method of the invention has the characteristics of simplicity, practicability and convenience for large-scale production. The invention has positive significance for reducing the alloying cost of the molten steel, improving the quality of the molten steel, improving the utilization efficiency of the rare earth and saving the rare earth resource.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. The utility model provides a method of getting rare earth cored wire for aluminium killed steel, this rare earth cored wire for aluminium killed steel is formed by the sealed cladding of metal protection tube shell by the direct alloying material of tombarthite, its characterized in that: the preparation method of the rare earth core-spun yarn for the aluminum killed steel comprises the following steps:
the method comprises the following steps: preparing rare earth oxide powder, metal aluminum powder, calcium oxide powder and dodecacalcium heptaluminate powder into rare earth aluminum homogeneous powder, wherein the fineness of the rare earth oxide powder is not more than 0.15mm, the fineness of the metal aluminum powder is not more than 0.15mm, the fineness of the calcium oxide powder is not more than 0.15mm, and the fineness of the dodecacalcium heptaluminate powder is not more than 0.075 mm;
step two: compacting the rare earth aluminum homogeneous powder into rare earth aluminum compact granules with the granularity not more than 5mm; rare earth oxide ReO in rare earth aluminum granules 2 The ratio of the molar mass of the medium rare earth metal Re to the molar mass of the calcium oxide CaO is within the range of 1.50 to 1.51;
step three: mixing and homogenizing the rare earth aluminum dense granules and the metal aluminum granules together to prepare an alloying rare earth core material, wherein the granularity of the metal aluminum granules is not more than 3mm;
step four: the method comprises the following steps of compacting an alloying rare earth core material into a round-strip-shaped rare earth aluminum core, wherein the compacted round-strip-shaped rare earth aluminum core becomes a rare earth direct alloying material, the mass content of rare earth oxide in the rare earth direct alloying material is 28-31%, the mass content of calcium oxide is 6-7%, the mass content of dodecacalcium heptaluminate is not more than 1%, and the balance is metal aluminum;
step five: coating the round strip-shaped rare earth aluminum core into a rare earth core solid blank tube by using a metal protective shell;
step six: respectively and radially compacting and axially straightening to compact the rare earth core solid blank tube into a circular straight strip rare earth core-spun yarn for the aluminum killed steel, the outer diameter of which is not more than 16 mm.
2. The method of claim 1, wherein the method comprises the following steps: the metal protection tube shell is a low-carbon steel protection tube shell, the wall thickness of the tube shell of the low-carbon steel protection tube shell is not more than 1.0mm, the outer diameter of the low-carbon steel protection tube shell is not more than 16mm, and the outer diameter of the homogeneous round bar is not more than the inner diameter of the low-carbon steel protection tube shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210070940.2A CN114317888B (en) | 2022-01-21 | 2022-01-21 | Rare earth core-spun yarn for aluminum killed steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210070940.2A CN114317888B (en) | 2022-01-21 | 2022-01-21 | Rare earth core-spun yarn for aluminum killed steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114317888A CN114317888A (en) | 2022-04-12 |
| CN114317888B true CN114317888B (en) | 2022-12-23 |
Family
ID=81028688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210070940.2A Active CN114317888B (en) | 2022-01-21 | 2022-01-21 | Rare earth core-spun yarn for aluminum killed steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114317888B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4578114A (en) * | 1984-04-05 | 1986-03-25 | Metco Inc. | Aluminum and yttrium oxide coated thermal spray powder |
| CN1234879C (en) * | 2003-08-19 | 2006-01-04 | 北京科技大学 | Method of rare-earth oxide treating steel fluid |
| CN1321214C (en) * | 2005-07-29 | 2007-06-13 | 龙南县龙钇重稀土材料有限责任公司 | Yttrium base rare earth silicon calcium iron alloy, its preparation method and use |
| CN100381586C (en) * | 2006-01-17 | 2008-04-16 | 沈阳东北大学冶金技术研究所 | Cored wire for deoxidation of molten steel |
| CN1974794A (en) * | 2006-12-19 | 2007-06-06 | 北京科技大学 | Method of treating molten steel with lime and RE fluoride |
| WO2009149581A1 (en) * | 2008-06-12 | 2009-12-17 | 鞍钢股份有限公司 | Additive for preparing steel containning super-finely dispersed oxide, producing method and application of the same |
| CN105821281B (en) * | 2016-03-29 | 2017-12-26 | 马鞍山市兴达冶金新材料有限公司 | A kind of direct steelmaking metal of alloying oxide core-spun yarn and preparation method thereof |
| CN111020379A (en) * | 2019-11-22 | 2020-04-17 | 龙南龙钇重稀土科技股份有限公司 | Rare earth composite reinforced hot-rolled steel bar and preparation method thereof |
| CN111500821B (en) * | 2020-05-20 | 2022-01-18 | 李素坤 | Preparation method of steel for composite cored wire and high heat input welding |
| CN112195304B (en) * | 2020-07-28 | 2022-02-18 | 龙南龙钇重稀土科技股份有限公司 | Core-spun yarn containing rare earth crystallizer pre-melted slag and application thereof |
| CN112301186B (en) * | 2020-09-11 | 2022-04-29 | 湖南华菱涟源钢铁有限公司 | Alloy cored wire and application thereof in oxide metallurgy |
| CN113088791B (en) * | 2021-03-24 | 2022-02-25 | 钢铁研究总院 | Method for preparing rare earth steel by reducing rare earth oxide step by step in refining process |
-
2022
- 2022-01-21 CN CN202210070940.2A patent/CN114317888B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114317888A (en) | 2022-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102206732B (en) | Solid-core passivated pure calcium cored wire and manufacturing method thereof | |
| CA2595989C (en) | Wire for refining molten metal and associated method of manufacture | |
| CN104561570B (en) | A kind of efficient using method utilizing the electroslag remelting refining slag returning slag | |
| CN103468965B (en) | Preparation method for electro-slag remelting refining slag efficiently utilizing return slag | |
| JP6104146B2 (en) | Submerged arc welding flux and manufacturing method thereof | |
| CN109623192B (en) | Stainless steel welding rod core wire with extremely low temperature rise, stainless steel welding rod, preparation and application | |
| JP2015030019A (en) | Flux for submerged arc welding | |
| CN114317888B (en) | Rare earth core-spun yarn for aluminum killed steel and preparation method thereof | |
| CN114350897B (en) | Rare earth core-spun yarn for silicon killed steel and preparation method thereof | |
| CN114350896B (en) | Rare earth magnesium core-spun yarn and preparation method thereof | |
| CN114317889B (en) | Rare earth calcium core-spun yarn | |
| CN102560131A (en) | Premelted refining slag and preparation method thereof | |
| CN104690448B (en) | A kind of belt carcass copperwelding rod for being suitable for fine region soldering | |
| CN106493372A (en) | The ball milling bending channel extruding curing of the discarded chip circular treatment of pure titanium | |
| CN202090014U (en) | Solid-core passivated pure calcium core-spun yarn | |
| CN106987759B (en) | A kind of corrosion-resistant screw-thread steel smelting process containing rare earth element | |
| CN210314342U (en) | Double-layer magnesium core nodulizer core-spun yarn | |
| CN111850234B (en) | High-yield and high-strength cold-drawn deoxidized aluminum bar and processing technology thereof | |
| CN101487084A (en) | Method for adding additive for electroslag remelting alloy tool and die steel | |
| CN204981946U (en) | Core -spun yarn of compound simple metal of carbonate | |
| CN105063387B (en) | It is a kind of to be used to produce titanium agent of aluminium alloy and preparation method thereof | |
| CN106756498A (en) | A kind of method that magnesium is added in high input energy welding steel | |
| CN208776763U (en) | Nodulizer composite core-spun yarn and its molding machine for liquid iron balling processing | |
| CN103924146B (en) | Titaniferous cored-wire and application thereof and Ti Alloying molten steel and preparation method thereof and a kind of titaniferous steel alloy | |
| CN202415601U (en) | Steel-making solid calcium line composite cored wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |