CN113106264A - Preparation method of electroslag remelting steel ingot with high yttrium element yield - Google Patents
Preparation method of electroslag remelting steel ingot with high yttrium element yield Download PDFInfo
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Abstract
The embodiment of the invention discloses a preparation method of an electroslag remelting steel ingot with high yttrium element yield, which comprises the following steps: obtaining an electrode ingot and slag charge; electrifying the slag materials for slagging, and cooling to obtain pre-melted liquid slag; carrying out electrode remelting on the pre-molten liquid slag and the electrode ingot to obtain an electroslag remelting steel ingot with high yttrium element yield; wherein, calcium carbonate powder is added in the electrode remelting process. The method continuously adds CaCO into the molten pool3Powder of CaCO3Decomposition into CaO + CO2Not only increases the beneficial components of CaO in the slag, but also increases CO on the surface of the slag layer2The gas layer isolates air on the premise of keeping slag components and fluidity, reduces oxygen invasion in the air, and reduces oxidation of rare earth yttrium element, thereby improving yield of yttrium element in electroslag remelting steel ingot, improving service temperature of material and prolonging service life of material.
Description
Technical Field
The invention relates to the field of alloy chemical analysis, in particular to a preparation method of an electroslag remelting steel ingot with high yttrium element yield.
Background
Electroslag remelting (electroslag remelting) steel is a method of melting steel using resistance heat generated when electric current is passed through slag as a heat source. The main purpose is to purify the metal and obtain a clean, uniform and compact steel ingot. The steel remelted by electroslag has high purity, low sulfur content, less non-metallic inclusions, smooth steel ingot surface, cleanness, uniformity and compactness, and uniform metallographic structure and chemical components. The as-cast mechanical property of the electroslag steel can reach or exceed the index of a forged piece of the same steel type. The quality of the electroslag steel ingot depends on a reasonable electroslag remelting process and equipment conditions for ensuring the electroslag process.
In the prior art, non-vacuum electroslag remelting is generally adopted, but when a steel ingot containing rare earth elements is remelted by the non-vacuum electroslag, the rare earth elements are easily oxidized to cause a great amount of oxidation loss of the rare earth elements, so that the service life of alloy materials used under a high-temperature condition is greatly reduced. Therefore, the problem of increasing the content of the rare earth element yttrium in the alloy material becomes a difficult problem in the metallurgical process.
How to develop a preparation method of an electroslag remelting steel ingot with high yttrium element yield to improve the content of rare earth element yttrium in an alloy material and fully improve the service temperature and the service life of the material becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a preparation method of an electroslag remelting steel ingot with high yttrium element yield, which can improve the yttrium element yield in the electroslag remelting steel ingot so as to improve the service temperature and the service life of materials.
In order to achieve the above object, the present invention provides a method for producing an electroslag remelting ingot with high yttrium element yield, the method comprising:
obtaining an electrode ingot and slag charge;
electrifying the slag materials for slagging, and cooling to obtain pre-melted liquid slag;
carrying out electrode remelting on the pre-molten liquid slag and the electrode ingot to obtain an electroslag remelting steel ingot with high yttrium element yield; wherein, calcium carbonate powder is added in the electrode remelting process.
Furthermore, 2-3 g of calcium carbonate powder wrapped by aluminum foil is added every 40-80 s in the electrode remelting process from the beginning of the electrode remelting.
Further, the slag comprises the following components in percentage by mass: 60-70% of CaF2And 30 to 40% of Y2O3。
Further, in the electrode remelting process, a 2-10 ba inert gas protection atmosphere is adopted, and the electrode ingot melting speed is controlled to be 85-90 kg/h.
Further, in the electrode remelting, 45-50V voltage, 1900-2100A arcing current and 2900-3000A smelting current are adopted.
Further, the electrode remelting is carried out in a crystallizer, the crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 9-11 mm smaller than that of the lower opening.
Furthermore, in the electrified slagging, 30-55V voltage and 3000-6000A current are adopted.
Further, the obtaining of the electrode ingot comprises:
obtaining ingot steel;
and baking the ingot steel to obtain the electrode ingot.
Further, the baking temperature is 600-800 ℃, and the baking time is 240-300 min.
Further, said obtaining an ingot comprises: smelting the raw materials, refining, wherein soft argon blowing is adopted for 5-10 min in the refining, then vacuum degassing is carried out for 15-25 min, and die casting is carried out to obtain ingot steel.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the invention provides a preparation method of an electroslag remelting steel ingot with high yttrium element yield, which comprises the following steps: obtaining an electrode ingot and slag charge; electrifying the slag materials for slagging, and cooling to obtain pre-melted liquid slag; carrying out electrode remelting on the pre-molten liquid slag and the electrode ingot to obtain an electroslag remelting steel ingot with high yttrium element yield; wherein, calcium carbonate powder is added in the electrode remelting process. According to the embodiment of the invention, CaCO is continuously added into the molten pool in the smelting process3Powder of CaCO3Decomposition into CaO + CO2Not only increases the beneficial components of CaO in the slag, but also increases CO on the surface of the slag layer2Gas layer before maintaining slag composition and fluidityUnder the premise of isolating air, the method reduces the invasion of oxygen in the air and reduces the oxidation of the rare earth elements, thereby improving the yield of the rare earth elements.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flow chart of a method for preparing an electroslag remelting steel ingot with high yttrium element yield, which is provided by an embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
according to a typical implementation manner of the embodiment of the invention, the preparation method of the electroslag remelting steel ingot with high yttrium element yield comprises the following steps:
s1, obtaining an electrode ingot and slag charge;
as an alternative embodiment, the obtaining of the electrode ingot includes:
smelting the raw materials, refining, wherein soft argon blowing is adopted for 5-10 min in the refining, then vacuum degassing is carried out for 15-25 min, and die casting is carried out to obtain the electrode ingot.
In the refining process, soft argon blowing is adopted for treatment for 5-10 min, and then vacuum degassing is carried out for 15-25 min, so that harmful gas in steel is reduced, and the adverse effects of reducing the ingot casting temperature and element segregation due to overlong or overlong soft blowing time are reduced; the rare earth yttrium element is easy to reduce or not uniform if the vacuum degassing time is too long or too short;
as an optional embodiment, the slag includes, in mass fraction: 60-70% of CaF2And 30 to 40% of Y2O3。
The main components of the slag charge have the following functions:
(1)CaF2: can reduce the melting point, viscosity and surface tension of the slag. If CaF2 is higher than 70%, the melting point of the slag is easily too low; if the CaF2 content is lower than 60%, the melting point of the slag is easily too high, and the conductivity is reduced;
(2) 30-40% of Y2O3: the effect is to keep the slag resistance, if the slag resistance is higher than 40%, the slag resistance is easily higher than the slag eutectic temperature; a lower than 30% level tends to result in a lower than slag eutectic temperature.
S2, electrifying the slag materials for slagging, and cooling to obtain pre-melted liquid slag;
the method specifically comprises the following steps: and adding the slag into a liquid slag tank, electrifying and slagging in the crystallizer by using a graphite electrode under the voltage of 30-55V and the current of 3000-6000A, and cooling to obtain the pre-melted liquid slag.
The slag melting adopts 30-55V voltage and 3000-6000A current for the reason that: the temperature of the slag heated by the electric arc can be ensured, and the voltage and the current are too large or too small, so that the adverse effect of insufficient melting heat of the slag or gas suction of the slag is easily generated;
s3, carrying out electrode remelting on the pre-molten liquid slag and the electrode ingot to obtain an electroslag remelting steel ingot with high yttrium element yield; wherein, calcium carbonate powder is added in the electrode remelting process.
The calcium carbonate powder is wrapped by aluminum foil, and 2-3 g of the calcium carbonate powder wrapped by the aluminum foil is added every 40-80 s from the beginning of electrode remelting.
The reason for adding 2-3 g of calcium carbonate powder wrapped by aluminum foil every 40-80 s is as follows: if the calcium carbonate powder added every 40-80 s is less than 2g, CO is easily generated2Deficiency; if the calcium carbonate powder added every 40-80 s is more than 3g, the recarburization of the molten steel is easily caused; the interval time of two adjacent times is less than 40s, so that the adverse effect of rare earth yttrium element segregation is easily caused, and the interval time of two adjacent times is more than 80s, so that oxygen in the air is easily invaded into slag;
the reason why the calcium carbonate powder is wrapped with the aluminum foil is as follows: if the calcium carbonate powder is not wrapped, the calcium carbonate powder can quickly fall into the surface of a slag pool when being added, the quantity of the calcium carbonate is lost, and the using effect is influenced;
the weight of the steel ingot is usually in the range of 88-90Kg, and for the steel ingot in the range, 2-3 g of calcium carbonate powder is added every time.
The total mass of the calcium carbonate powder added is 1.1-1.2 g/kg steel ingot: if the total amount is too much, the stability of the electroslag process and the temperature balance of a molten pool are not facilitated, and if the total amount is too little, the protection effect of calcium oxide and carbon dioxide generated by sufficient decomposition of calcium carbonate is not facilitated.
As an optional embodiment, in the electrode remelting, a protective atmosphere of 2-10 ba inert gas is adopted, and the melting speed of the electrode ingot is controlled to be 88-90 kg/h. The melting speed in the range is favorable for the stability of an electroslag process, the depth of a molten pool is moderate, the crystalline structure is good, the electroslag process is unstable when the melting speed is too large or too small, and the adverse effect of too deep or too shallow depth of the molten pool is caused;
in the electrode remelting process, the voltage is 45-50V, the arc starting current is 1900-2100A, and the smelting current is 2900-3000A. The reason why the voltage current is controlled within the range in the electrode remelting is as follows: stabilizing the electroslag metallurgy process, forming a slag bath and a molten bath as soon as possible, keeping current density to balance the temperature field of the slag bath, and easily arcing and breaking down a bottom water tank when the temperature field is too large or too small, and deteriorating a bottom steel ingot structure when the arc starting time is long;
as an optional embodiment, the electrified slagging and the electrode remelting are both carried out in a crystallizer, the crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 9-11 mm smaller than that of the lower opening.
The size of the crystallizer is improved so as to reduce the temperature difference of a molten pool temperature field; if the diameter of the upper opening is smaller than that of the lower opening by less than 8mm, the weight of the smelted steel ingot is not favorably maintained, and if the diameter of the upper opening is larger than that of the lower opening by more than 12mm, the steel ingot is not favorably separated from a crystallizer after being solidified;
as an optional implementation manner, the step S3 specifically includes:
baking the ingot steel to obtain an electrode ingot; the baking temperature is 600-800 ℃, and the baking time is 240-300 min. Before remelting the electrode, the ingot steel is roasted, so that the diffusion of hydrogen in the electrode is facilitated, the gas in the steel is reduced, the roasting temperature is too high or too low, the energy is wasted, and the gas cannot be removed;
and adding the premelted liquid slag into a crystallizer, welding the electrode ingot with an electrode to obtain an electrode bar, and remelting the electrode bar by using the electrode bar to obtain an electroslag remelting steel ingot with high yttrium element yield.
In summary, according to the method for preparing the electroslag remelting steel ingot with high yttrium element yield provided by the embodiment of the invention, CaCO is continuously added into a molten pool in the smelting process3Powder of CaCO3Decomposition into CaO + CO2Not only increases the beneficial components of CaO in the slag, but also increases CO on the surface of the slag layer2The air layer isolates air on the premise of keeping slag components and fluidity, reduces the invasion of oxygen in the air, and reduces the oxidation of rare earth elements, thereby improving the yield of the rare earth elements.
The following will explain in detail a method for producing an electroslag remelting ingot with high yttrium yield according to the present application, with reference to examples, comparative examples, and experimental data.
In the embodiment of the invention, the electroslag remelting steel ingot is particularly of an SGHYZ type, and the chemical compositions by mass fraction are as follows: c is less than or equal to 0.03%, Cr: 20-22%, Al: 5.5-6.0 percent, and Y is more than or equal to 0.035 percent.
Example 1
The embodiment of the invention provides a preparation method of an electroslag remelting steel ingot with high yttrium element yield, which comprises the following steps:
1. smelting the raw materials, and then refining, wherein soft argon blowing is adopted for treatment for 8min in the refining, then vacuum degassing is carried out for 20min, and then die casting is carried out to obtain an electrode ingot; through detection, O, H, N mass percent in the obtained electrode ingot meets the requirements that O is less than or equal to 0.001 percent, H is less than or equal to 0.0002 percent and N is less than or equal to 0.005 percent;
2. obtaining slag charge; the slag comprises the following components in percentage by mass: 65% CaF2And 35% of Y2O3。
3. And adding the slag into a liquid slag tank, electrifying the crystallizer by using a graphite electrode under the voltage of 45V and the current of 5000A for slagging, and cooling to obtain pre-melted liquid slag.
4. Baking the ingot steel to obtain an electrode ingot; the baking temperature is 700 ℃, and the baking time is 280 min.
Welding the electrode ingot with an electrode to obtain an electrode bar; and the use of an internal and bent as-cast steel bar electrode is avoided. The slag inclusion part in the steel bar electrode is cut off before smelting.
And adding the premelted liquid slag into a crystallizer, and remelting an electrode by using the electrode bar to obtain an electroslag remelting steel ingot with high yttrium element yield. The crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 9mm smaller than that of the lower opening.
In the electrode remelting, 2.5g of calcium carbonate powder wrapped by aluminum foil is added every 60s from the start time of the electrode remelting. In the electrode remelting process, 8ba inert gas protective atmosphere is adopted, and the electrode ingot melting speed is controlled at 88 kg/h. In the electrode remelting process, 46V voltage, 2000A arc starting current and 2950A smelting current are adopted.
Example 2
1. Smelting the raw materials, refining, wherein soft argon blowing is adopted for 5min in the refining, then vacuum degassing is carried out for 15min, and then die casting is carried out to obtain an electrode ingot; through detection, O, H, N mass percent in the obtained electrode ingot meets the requirements that O is less than or equal to 0.001 percent, H is less than or equal to 0.0002 percent and N is less than or equal to 0.005 percent;
2. obtaining slag charge; the slag comprises the following components in percentage by mass: 60% CaF2And 40% of Y2O3。
3. And adding the slag into a crystallizer, electrifying the crystallizer by using a graphite electrode under the voltage of 30V and the current of 3000A to melt slag, and cooling to obtain the pre-solution liquid slag.
4. Baking the ingot steel to obtain an electrode ingot; the baking temperature is 600 ℃, and the baking time is 240 min.
Welding the electrode ingot with an electrode to obtain an electrode bar; and the use of an internal and bent as-cast steel bar electrode is avoided. The slag inclusion part in the steel bar electrode is cut off before smelting.
And (3) lifting out the graphite electrode in the crystallizer, adding the pre-dissolved liquid slag into the crystallizer, and remelting the electrode with the electrode bar to obtain an electroslag remelting steel ingot with high yttrium element yield. The crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 9mm smaller than that of the lower opening.
In the electrode remelting process, 2g of calcium carbonate powder wrapped by aluminum foil is added every 40s from the start time of the electrode remelting. In the electrode remelting process, a 2ba inert gas protective atmosphere is adopted, and the melting speed of the electrode ingot is controlled to be 1.1 kg/h. In the electrode remelting, 45V voltage, 1900A arcing current and 2900A smelting current are adopted.
Example 3
1. Smelting the raw materials, refining, wherein soft argon blowing is adopted for 10min in the refining, then vacuum degassing is carried out for 25min, and then die casting is carried out to obtain an electrode ingot; through detection, O, H, N mass percent in the obtained electrode ingot meets the requirements that O is less than or equal to 0.001 percent, H is less than or equal to 0.0002 percent and N is less than or equal to 0.005 percent;
2. obtaining slag charge; the slag comprises the following components in percentage by mass: 70% CaF2And 30% of Y2O3。
3. And adding the slag into a liquid slag tank, electrifying the crystallizer by using a graphite electrode under 55V voltage and 6000A current for slagging, and cooling to obtain the pre-dissolved liquid slag.
4. Baking the ingot steel to obtain an electrode ingot; the baking temperature is 800 ℃, and the baking time is 300 min.
Welding the electrode ingot with an electrode to obtain an electrode bar; and the use of an internal and bent as-cast steel bar electrode is avoided. The slag inclusion part in the steel bar electrode is cut off before smelting. And (3) lifting out the graphite electrode in the crystallizer, adding the pre-dissolved liquid slag into the crystallizer, and remelting the electrode with the electrode bar to obtain an electroslag remelting steel ingot with high yttrium element yield. The crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 11mm smaller than that of the lower opening.
In the electrode remelting process, 3g of calcium carbonate powder wrapped by aluminum foil is added every 80s from the start time of the electrode remelting. In the electrode remelting process, a 10ba inert gas protective atmosphere is adopted, and the melting speed of the electrode ingot is controlled to be 1.2 kg/h. In the electrode remelting, 50V voltage, 2100A arc starting current and 3000A smelting current are adopted.
Comparative example 1
In the electrode remelting process described in this comparative example, no aluminum foil-wrapped calcium carbonate powder was added; the rest of the procedure was the same as in example 1.
Comparative example 2
In the electrode remelting in this comparative example, 1g of calcium carbonate powder wrapped with aluminum foil was added every 60 seconds; the rest of the procedure was the same as in example 1.
Comparative example 3
In the electrode remelting in this comparative example, 4g of calcium carbonate powder wrapped with aluminum foil was added every 60 s; the rest of the procedure was the same as in example 1.
Comparative example 4
In the electrode remelting described in this comparative example, 2.5g of calcium carbonate powder wrapped with aluminum foil was added every 30 seconds; the rest of the procedure was the same as in example 1.
Comparative example 5
In the electrode remelting described in this comparative example, 2.5g of calcium carbonate powder wrapped with aluminum foil was added every 90 seconds; the rest of the procedure was the same as in example 1.
Comparative example 6
This comparative example was carried out using a method commonly used in the art, comprising:
1. before electroslag remelting smelting, an yttrium-containing stainless steel electrode is clamped by a clamping head, the electrode is ensured to be perpendicular to a water tank copper plate, and the distance between the tail end of the electrode and the copper plate is kept to be 15 mm.
2. When smelting, firstly, electricity is supplied, then the melted high-temperature liquid slag is poured into a crystallizer, and when slag is poured, the high-temperature liquid slag flows rapidly and greatly and slag leakage is avoided. The arc striking current is adjusted to 2000A after slag pouring, the current control reaches 2800A within 1 minute, and the normal automatic control smelting state is rapidly entered after the slag temperature rises. People do not leave the machine and adjust the current at any time, the current fluctuation is not more than 100A, and the arc striking phenomenon and the internal defects of steel ingots caused by overlarge current fluctuation are avoided. And in the final stage of smelting, a current reduction feeding mode is adopted, and the current is controlled at 1500-2000A. And stopping power failure feeding. After the feeding is finished, the steel ingot is calmed for 5 minutes, and then the ingot can be removed. The recovery rate of rare earth element yttrium in the electroslag remelting steel ingot is 10 percent on average.
Experimental example 1
The contents of yttrium element in the electroslag remelted steel ingots obtained in examples 1 and 3 are listed in table 1;
TABLE 1
As can be seen from the data in Table 1:
in the comparative example 1, calcium carbonate powder is not added, the yield of the yttrium element is 0.025 percent, and the service life is 76 hours;
in the comparative example 2, 1g of calcium carbonate powder wrapped by aluminum foil is added, the range of the calcium carbonate powder is less than that of the calcium carbonate powder in the embodiment 2-3 g, the yield of yttrium element is 0.027%, and the service life is 76 h;
in the comparative example 3, 4g of calcium carbonate powder wrapped by aluminum foil is added, the range of the calcium carbonate powder is larger than that of the calcium carbonate powder in the embodiment 2-3 g, the yield of yttrium element is 0.026%, and the service life is 78 h;
in the comparative example 4, the calcium carbonate powder is added every 30s and is smaller than the range of 40-80 s in the embodiment of the invention, the yield of the yttrium element is 0.029%, and the service life is 83 h;
in the comparative example 5, calcium carbonate powder is added every 90s, which is larger than the range of 40-80 s in the embodiment of the invention, the yield of yttrium element is 0.030%, and the service life is 90 h;
in the comparative example 6, the yield of the yttrium element is 0.027% and the service life is 89h by adopting a conventional method;
in examples 1 to 3, the yield of yttrium element is 0.039% -0.045%, the use temperature is 1350 ℃, and the service life is 92-100 h. Compared with comparative examples 1 to 6, examples 1 to 3 have higher yield and longer service life of yttrium element.
In summary, the technical scheme of the preparation method of the electroslag remelting steel ingot with high yttrium element yield in the embodiment of the application at least has the following technical effects or advantages:
1. test in the smelting process, CaCO is continuously added into a molten pool3Powder of CaCO3Decomposition into CaO + CO2Not only increases the beneficial components of CaO in the slag, but also increases CO on the surface of the slag layer2The air layer isolates air on the premise of keeping slag components and fluidity, and reduces the invasion of oxygen in the air. The oxidation of the rare earth elements is reduced, so that the recovery rate of the rare earth elements is improved; while adding CaCO3The CaO content in the slag is increased, and the alkalinity and the desulfurization rate of the slag are improved.
2. The increase of rare earth elements in the steel increases the service temperature of the material by 50 ℃, and the service life of the material is prolonged from 80 hours to 100 hours.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A preparation method of an electroslag remelting steel ingot with high yttrium element yield is characterized by comprising the following steps:
obtaining an electrode ingot and slag charge;
electrifying the slag materials for slagging, and cooling to obtain pre-melted liquid slag;
carrying out electrode remelting on the pre-molten liquid slag and the electrode ingot to obtain an electroslag remelting steel ingot with high yttrium element yield; wherein, calcium carbonate powder is added in the electrode remelting process.
2. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 1, wherein the calcium carbonate powder is wrapped by aluminum foil, and 2-3 g of the calcium carbonate powder wrapped by the aluminum foil is added every 40-80 s from the beginning of electrode remelting.
3. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 1, wherein the total mass of the added calcium carbonate powder is 1.1-1.2 g/kg of steel ingot.
4. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 1, wherein the slag comprises the following components in percentage by mass: 60-70% of CaF2And 30 to 40% of Y2O3。
5. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 1, wherein a protective atmosphere of 2-10 ba inert gas is adopted in electrode remelting, the melting speed of the electrode ingot is controlled to be 85-90 kg/h, and the smelting current is 45-50V, 1900-2100A arcing current and 2900A-3000A arcing current.
6. The method for producing an electroslag remelting ingot with high yttrium yield according to claim 1, wherein the electrode remelting is performed in a crystallizer, the crystallizer comprises an upper opening and a lower opening, and the diameter of the upper opening is 9-11 mm smaller than that of the lower opening.
7. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 1, wherein a voltage of 30-55V and a current of 3000-6000A are used in the electrified slagging.
8. The method for preparing an electroslag remelting ingot with high yttrium element yield according to claim 1, wherein the obtaining of the electrode ingot comprises:
obtaining ingot steel;
and baking the ingot steel to obtain the electrode ingot.
9. The method for preparing an electroslag remelting steel ingot with high yttrium element yield according to claim 8, wherein the baking temperature is 600-800 ℃, and the baking time is 240-300 min.
10. The method for producing an electroslag remelting ingot with high yttrium yield according to claim 8, wherein the obtaining the ingot comprises: smelting the raw materials, refining, wherein soft argon blowing is adopted for 5-10 min in the refining, then vacuum degassing is carried out for 15-25 min, and die casting is carried out to obtain ingot steel.
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| US3980468A (en) * | 1973-11-01 | 1976-09-14 | Cabot Corporation | Method of producing a ductile rare-earth containing superalloy |
| JP2009084631A (en) * | 2007-09-28 | 2009-04-23 | Japan Steel Works Ltd:The | Electroslag remelting method |
| CN103468964A (en) * | 2013-09-18 | 2013-12-25 | 安徽工业大学 | New slag system for synchronously controlling hydrogen-oxygen content of electroslag ingot and preparation method thereof |
| CN113444891A (en) * | 2021-06-08 | 2021-09-28 | 燕山大学 | Method for producing rare earth-containing high-temperature alloy by adopting rare earth oxide |
| CN113981235A (en) * | 2021-11-10 | 2022-01-28 | 成都先进金属材料产业技术研究院股份有限公司 | Electroslag remelting ultralow oxygen control slag system containing fluorine-containing rare earth carbonate concentrate |
| CN114045402A (en) * | 2021-11-16 | 2022-02-15 | 成都先进金属材料产业技术研究院股份有限公司 | Electroslag remelting slag system of fluorine-containing calcium carbonate rare earth concentrate |
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| US3980468A (en) * | 1973-11-01 | 1976-09-14 | Cabot Corporation | Method of producing a ductile rare-earth containing superalloy |
| JP2009084631A (en) * | 2007-09-28 | 2009-04-23 | Japan Steel Works Ltd:The | Electroslag remelting method |
| CN103468964A (en) * | 2013-09-18 | 2013-12-25 | 安徽工业大学 | New slag system for synchronously controlling hydrogen-oxygen content of electroslag ingot and preparation method thereof |
| CN113444891A (en) * | 2021-06-08 | 2021-09-28 | 燕山大学 | Method for producing rare earth-containing high-temperature alloy by adopting rare earth oxide |
| CN113981235A (en) * | 2021-11-10 | 2022-01-28 | 成都先进金属材料产业技术研究院股份有限公司 | Electroslag remelting ultralow oxygen control slag system containing fluorine-containing rare earth carbonate concentrate |
| CN114045402A (en) * | 2021-11-16 | 2022-02-15 | 成都先进金属材料产业技术研究院股份有限公司 | Electroslag remelting slag system of fluorine-containing calcium carbonate rare earth concentrate |
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