CN113881889A - Castable, preparation method and application thereof - Google Patents

Castable, preparation method and application thereof Download PDF

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Publication number
CN113881889A
CN113881889A CN202111050997.8A CN202111050997A CN113881889A CN 113881889 A CN113881889 A CN 113881889A CN 202111050997 A CN202111050997 A CN 202111050997A CN 113881889 A CN113881889 A CN 113881889A
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percent
alloy
castable
die
casting
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潘安霞
程凤军
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Changzhou Vocational Institute of Light Industry
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Changzhou Vocational Institute of Light Industry
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Priority to CN202111050997.8A priority Critical patent/CN113881889A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/08—Manufacture of cast-iron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C22C33/10—Making cast-iron alloys including procedures for adding magnesium

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The invention relates to a castable, a preparation method and application thereof, wherein the castable comprises the following chemical components in percentage by mass: 3.0-3.4% of C; 1.5-1.8% of Si; 0.3-0.6% of Mn0; p is less than or equal to 0.04 percent; s is less than or equal to 0.05 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.1 to 0.2 percent of Ti, and the balance of Fe. The preparation method of the die is also disclosed, and the die material is low in carbon equivalent, low in alloy content, simple in preparation method, low in production cost, excellent in crack resistance and long in service life.

Description

Castable, preparation method and application thereof
Technical Field
The invention relates to a castable, in particular to a castable with good crack resistance and a preparation method thereof.
Background
In the steel smelting process, in order to obtain the chemical components and the performance of steel, aluminum-iron alloy needs to be added regularly and quantitatively for deoxidation, the most convenient and rapid adding method is to put alloy material blocks with proper granularity into a smelting furnace, the production of the alloy material blocks needs to be molded by casting with a special metal mold, the casting temperature of the mold molding is usually over 1200 ℃, the continuous production and the water spray cooling are carried out, the mold works in a rapid cooling and heating environment, the easy cracking of the mold is the main reason of the failure, the mold replacement can reduce the production efficiency and increase the production cost. In the prior art, materials such as heat-resistant steel, stainless steel, heat-resistant cast iron and the like are generally used as preparation materials of the die, and the die is extremely easy to crack in the cold and hot alternating process of the die due to poor performances such as heat conductivity, fatigue resistance and the like.
The high-silicon nodular cast iron has good heat resistance, but the material has poor heat conductivity, cannot meet the requirements of rapid cooling and rapid heating during die casting and water spraying in the aluminum-iron alloy casting process, and is easy to generate cracks. Other heat-resistant cast iron or heat-resistant vermicular cast iron has a large and bulky graphite sheet and is easily cracked even when the heat and cold are alternated. In order to ensure that the die is not easy to crack after long-term use, some dies are made of pure copper and are very expensive, so that a material with low price and excellent performance is required to replace the pure copper material.
In view of the defects of the existing castable, the inventor develops a new die castable and a preparation method thereof by matching theoretical analysis and research innovation based on years of abundant experience and professional knowledge of the materials, mainly improves the anti-cracking performance of the die castable in repeated extremely cold and hot environments and reduces the production cost.
Disclosure of Invention
The first purpose of the invention is to provide a casting material, which improves the cracking performance of the prepared material.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a castable which comprises the following chemical components in percentage by mass: 3.0-3.4% of C; 1.5-1.8% of Si; 0.3-0.6% of Mn0; p is less than or equal to 0.04 percent; s is less than or equal to 0.05 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.1 to 0.2 percent of Ti, and the balance of Fe.
Preferably, the chemical components comprise the following components in percentage by mass: 3.0-3.3% of C; 1.5-1.7% of Si; 0.3-0.5% of Mn0.3; p is less than or equal to 0.03 percent; s is less than or equal to 0.03 percent; mg0.018-0.025%; 0.01-0.03% of Re0.01-0.03% of Ti0.15-0.20%.
Preferably, the chemical components comprise the following components in percentage by mass: 3.0-3.2% of C; 1.5-1.7% of Si; 0.3-0.45% of Mn0.3; p is less than or equal to 0.28 percent; s is less than or equal to 0.03 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.15 to 0.18 percent of Ti, and the balance of Fe.
The invention also aims to provide a preparation method of the castable.
The technical purpose of the invention is realized by the following technical scheme:
the preparation method of the castable comprises the following operation steps:
(1) weighing and melting the raw materials according to the mass percent, wherein the added raw materials are pig iron, low-carbon steel, ferrosilicon, ferromanganese and ferrotitanium. Firstly adding pig iron and low-carbon steel, completely melting, then adding ferrosilicon and ferromanganese, heating to 1480-1520 ℃, adding ferrotitanium, preserving heat for 2-3 min, and then discharging;
(2) when the material in the step (1) is discharged into molten iron, adding 0.5-0.6% of rare earth magnesium-silicon alloy and 0.3-0.5% of ferrosilicon alloy into the ladle bottom for modification treatment to obtain a target product; the rare earth magnesium-silicon alloy and the silicon-iron alloy can be added simultaneously or separately, for example, 0.5-0.6% of the rare earth magnesium-silicon alloy is added at the bottom of the ladle, and then 0.3-0.5% of the silicon-iron alloy is added for liquid iron modification treatment when liquid iron is discharged.
The vermicular graphite can be obtained by processing the added rare earth magnesium alloy, so that the crack source caused by the tip effect of the flake graphite is greatly reduced, but the heat-conducting property of the material is not reduced, and the cracking tendency generated when the die is quenched and heated rapidly can be reduced; the ferrosilicon alloy with the content of 0.3-0.5% is added to treat the iron liquid, so that graphite can be refined, and the vermicular graphite can be stably obtained by adding 0.1-0.2% of Ti, so that the graphite is prevented from forming a sphere, and the heat conductivity of the material is reduced. Meanwhile, Ti reacts with C to generate TiC micro particles, so that the crack is effectively prevented from expanding; and the aging temperature of the die is controlled at 500-550 ℃, the heat preservation time is 8-10 h, the internal stress of the die is fully released, and the cracking tendency of the die can be effectively reduced.
A third object of the invention is to provide the use of castable materials.
The technical effects of the invention are realized by the following technical scheme:
the casting material is applied to preparing a special alloy casting mould.
Preferably, the casting material is applied to the preparation of a mold or an accessory used in a rapid cooling and rapid heating environment and a cold and hot alternating environment, for example, the casting material is used on an aluminum-iron alloy production line, the mold prepared by the casting material is used as a casting mold for producing aluminum-iron alloy, aluminum-iron alloy molten metal at 1200 ℃ is cast into the mold, and then water spray cooling is carried out, so that the mold is subjected to rapid temperature change.
Preferably, the special die for alloy casting is prepared by the following operation steps:
s1, casting and molding the castable;
and S2, carrying out aging treatment on the mold cast and molded in the step S1 to obtain a target product.
Preferably, the casting temperature in the step S1 is 1360-1400 ℃.
Preferably, the aging temperature in step S2 is 500 to 550 ℃.
Preferably, the step S2 is carried out for 8-10 h at the aging temperature, and furnace cooling is carried out to the room temperature.
In conclusion, the invention has the following beneficial effects:
1. the die material prepared by the castable of the invention has simple components, does not need to add common alloy elements such as Cu, Cr, Mo, Ni and the like, and has low production cost, because the alloy elements Cu, Cr, Mo and Ni can improve the strength of the material by increasing the pearlite amount, but the die of the castable is basically free from the action of external force and does not need high strength, the pearlite content of the material is increased by adding the alloy, and the cracking tendency of the die can be increased by decomposing the pearlite at high temperature.
2. The composition design of the carbon equivalent, the Si content and the Mn content in the castable disclosed by the invention is to reduce the possibility of failure of the die in the using process from different angles according to the using characteristics of the die. Firstly, the castable disclosed by the invention has the characteristics of low carbon equivalent (CE: 3.6-3.8%), particularly low silicon content (Si1.5-1.8%), and due to the low carbon equivalent and silicon content, graphite in the castable is fine, the matrix is small in cracking, and cracks are not easy to generate. The high-temperature-resistant die is usually prepared from vermicular cast iron with high carbon equivalent (CE: 4.3-4.7%), and the graphite in the material structure is coarse, so that the matrix can be seriously cracked, and the service life of the die can be shortened under the conditions of rapid cooling and rapid heating.
3. According to the invention, the cast iron adopts a lower Mn content, besides the alloy elements such as Cu, Cr, Mo and Ni, the pearlite can be increased, the Mn element can also increase the pearlite, the pearlite is unfavorable for the service life of the die, the pearlite can be decomposed into ferrite and graphite, the formation of the graphite can cause the premature crack of the die to lose efficacy, and the lower Mn content can reduce the pearlite amount, and can effectively reduce the cracking of the casting caused by the graphitization of the C element in the pearlite under a high-temperature environment, so that the Mn content in the casting material is lower than that of common cast iron, and the content range is 0.3-0.6%.
4. On the basis of the components, the graphite form of the castable is improved, and the common flake graphite is changed into vermicular graphite with passivated graphite sheet tips, and because the vermicular graphite does not have the sharp angle effect of the flake graphite, the cracking tendency of the castable in the using process is well inhibited. The formation of the vermicular graphite not only can properly improve the strength of the material, but also can further reduce the pearlite content, which is double beneficial to the service life of the die. The addition of a proper amount of Ti (Ti0.1-0.2%) can reduce the thermal conductivity of the material, obtain stable vermicular graphite and prevent the disadvantage of the graphite in sheet or spherical form to the service life of the die. The Ti element and the C element can react to generate fine TiC spherical particles, and the fine particles can enhance the crack resistance of the material and prolong the service life of the die, so that the Ti element is dual-beneficial to prolonging the service life of the castable.
5. Compared with widely used heat-resistant cast iron, heat-resistant nodular cast iron or vermicular cast iron with better heat resistance, the castable disclosed by the invention adopts the matching of a plurality of factors such as low carbon equivalent (low silicon content), low Mn content, vermicular graphite, addition of Ti element and the like, so that the premature failure of the castable in the using process is prevented to the greatest extent, the requirement of rapid cooling and rapid heating of a mould in the casting process is better met, and the production process is simple and the cost is low.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the castable, the preparation method and the application thereof according to the present invention, and the specific embodiments, characteristics and effects thereof are described in detail as follows.
Example 1:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.15 percent of C; si1.53 percent; 0.46 percent of Mn0; p is 0.03 percent; 0.03 percent of S; mg0.022%; re0.016%, Ti0.18% and Fe for the rest.
The preparation method of the mould comprises the following steps:
(1) weighing the raw materials according to a certain mass percentage, firstly adding 72 percent of pig iron and 25 percent of low-carbon steel into an electric furnace, after the pig iron and the low-carbon steel are completely melted, adding 0.75 percent of ferrosilicon and 0.46 percent of ferromanganese, heating to 1480-1520 ℃, adding 0.38 percent of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.55% of rare earth magnesium-silicon alloy and 0.3% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. Tests show that the die only has fine cracks under the condition of continuous production and use, does not influence the use and has the service life of more than 10 weeks.
Example 2:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.24 percent of C; si1.60 percent; 0.55 percent of Mn0; p is 0.025 percent; 0.022% of S; mg0.020%; re0.017 percent, Ti0.14 percent and the balance of Fe.
The preparation method of the mould comprises the following steps:
(1) weighing raw materials according to a certain mass percentage, firstly adding 75% of pig iron and 23% of low-carbon steel into an electric furnace, after the raw materials are completely melted, adding 0.83% of ferrosilicon and 0.62% of ferromanganese, heating to 1480-1520 ℃, adding 0.29% of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.55% of rare earth magnesium-silicon alloy and 0.3% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. The verification proves that the die only has fine cracks under the continuous production and use conditions, the use is not influenced, and the service life is more than 10 weeks.
Example 3:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.25 percent of C; si1.69%; 0.38 percent of Mn0; p0.024%; 0.026% of S; mg0.020%; re0.016%, Ti0.16% and Fe for the rest.
The preparation method of the mould comprises the following steps:
(1) weighing raw materials according to a certain mass percentage, firstly adding 75% of pig iron and 22.5% of low-carbon steel into an electric furnace, completely melting, then adding 0.96% of ferrosilicon and 0.35% of ferromanganese, heating to 1480-1520 ℃, adding 0.34% of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.55% of rare earth magnesium-silicon alloy and 0.4% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. The verification proves that the die only has fine cracks under the continuous production and use conditions, the use is not influenced, and the service life is more than 10 weeks.
Example 4:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.34 percent of C; si 1.75%; 0.57 percent of Mn0; p is 0.025 percent; 0.027 percent of S; mg0.021%; 0.015 percent of Re0, 0.20 percent of Ti0 and the balance of Fe.
The preparation method of the mould comprises the following steps:
(1) weighing raw materials according to a certain mass percentage, firstly adding 77% of pig iron and 20% of low-carbon steel into an electric furnace, after completely melting, adding 1% of ferrosilicon and 0.68% of ferromanganese, heating to 1480-1520 ℃, adding 0.42% of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.6% of rare earth magnesium-silicon alloy and 0.4% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. The verification proves that the die only has fine cracks under the continuous production and use conditions, the use is not influenced, and the service life is more than 10 weeks.
Example 5:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.35 percent of C; si1.76%; 0.57 percent of Mn0; p0.023%; 0.026% of S; mg0.023%; re0.016%, Ti0.18% and Fe for the rest.
The preparation method of the mould comprises the following steps:
(1) weighing the raw materials according to a certain mass percentage, firstly adding 78% of pig iron and 20% of low-carbon steel into an electric furnace, after the pig iron and the low-carbon steel are completely melted, adding 1% of ferrosilicon and 0.68% of ferromanganese, heating to 1480-1520 ℃, adding 0.38% of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.6% of rare earth magnesium-silicon alloy and 0.5% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. The verification proves that the die only has fine cracks under the continuous production and use conditions, the use is not influenced, and the service life is more than 10 weeks.
Example 6:
the embodiment provides a special die material for alloy casting and a preparation method thereof, wherein the special die material comprises the following chemical components in percentage by mass: 3.36 percent of C; si1.78%; 0.57 percent of Mn0; p is 0.025 percent; 0.030% of S; mg0.025 percent; re0.014%, Ti0.16%, and the balance Fe.
The preparation method of the mould comprises the following steps:
(1) weighing raw materials according to a certain mass percentage, firstly adding 77% of pig iron and 19% of low-carbon steel into an electric furnace, completely melting, then adding 1% of ferrosilicon and 0.68% of ferromanganese, heating to 1480-1520 ℃, adding 0.34% of ferrotitanium, preserving heat for 2-3 min, and then discharging.
(2) And (3) during tapping, performing modification treatment by adopting 0.6% of rare earth magnesium-silicon alloy and 0.5% of silicon-iron alloy, and performing casting molding on the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 550 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. The verification proves that the die only has fine cracks under the continuous production and use conditions, the use is not influenced, and the service life is more than 10 weeks.
Comparative example:
the embodiment provides a mold material and a preparation method thereof, wherein the mold material comprises the following chemical components in percentage by mass: 3.70 percent of C; si 2.70%; 0.85 percent of Mn0; 0.56 percent of Cu0; mo0.26%; p is 0.03 percent; 0.02% of S; mg0.015 percent; 0.030% of Re0, and the balance of Fe.
The preparation method of the mould comprises the following steps:
(1) weighing the raw materials according to a certain mass percentage, wherein the raw materials are as follows: 86% of pig iron, 8.5% of low-carbon steel, 2.1% of ferrosilicon, 1.25% of ferromanganese, 0.6% of copper and 0.42% of ferromolybdenum, then putting the raw materials into a medium-frequency induction furnace for melting, heating to 1450-1500 ℃, preserving heat for 2-3 min, and discharging.
(2) And (3) modifying by using 0.8% of rare earth magnesium vermiculizer and 0.8% of ferrosilicon alloy when discharging, and casting and molding the treated molten iron by using a sand mold, wherein the casting temperature is controlled to be 1360-1400 ℃.
(3) And (3) carrying out artificial aging treatment on the die casting, wherein the aging treatment temperature is 500 ℃, the heat preservation time is 8-10 h, and the furnace is cooled to the room temperature. Under the condition of continuous production and use, the die is failed due to serious cracks after being used for 2-3 weeks.
According to the comparison example, the conventional vermicular cast iron material is adopted to prepare the die, the composition characteristics are high carbon content and high silicon content, alloy elements copper and molybdenum are required to be added, the material has high heat corrosion resistance, but when the vermicular cast iron material is applied to the die in a rapid cooling and rapid heating environment, the anti-cracking performance is poor, and the service life is short; the casting material of the invention effectively reduces the production cost by adjusting the proportion of each component and the element composition and improving the structure of the casting material, and the casting mold can be better suitable for the rapid cooling and heating environment, thereby effectively prolonging the service life of the casting material.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. A castable material is characterized in that: the chemical components by mass percent are as follows: 3.0-3.4% of C; 1.5-1.8% of Si; 0.3-0.6% of Mn0; p is less than or equal to 0.04 percent; s is less than or equal to 0.05 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.1 to 0.2 percent of Ti, and the balance of Fe.
2. A castable material according to claim 1, wherein: the chemical components by mass percent are as follows: 3.0-3.3% of C; 1.5-1.7% of Si; 0.3-0.5% of Mn0.3; p is less than or equal to 0.03 percent; s is less than or equal to 0.03 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.15 to 0.20 percent of Ti, and the balance of Fe.
3. A castable material according to claim 1, wherein: the chemical components by mass percent are as follows: 3.0-3.2% of C; 1.5-1.7% of Si; 0.3-0.45% of Mn0.3; p is less than or equal to 0.28 percent; s is less than or equal to 0.03 percent; mg0.018-0.025%; 0.01 to 0.03 percent of Re0.01 to 0.03 percent of Ti0.15 to 0.18 percent of Ti, and the balance of Fe.
4. The method for preparing a castable according to claim 1, wherein: the method comprises the following operation steps:
(1) weighing the raw materials according to the mass percentage, firstly adding pig iron and low-carbon steel into an electric furnace, completely melting, adding ferrosilicon and ferromanganese, heating to 1480-1520 ℃, adding ferrotitanium, preserving heat for 2-3 min, and discharging;
(2) and (2) when the material in the step (1) is discharged into molten iron, adding 0.5-0.6% of rare earth magnesium-silicon alloy and 0.3-0.5% of ferrosilicon alloy into the ladle bottom for modification treatment to obtain a target product.
5. The castable of claim 1 is applied to preparing a special alloy casting mould.
6. The special die for alloy casting according to claim 1 or 4, wherein: is prepared by the following operation steps:
s1, casting and molding the castable;
and S2, carrying out aging treatment on the mold cast and molded in the step S1 to obtain a target product.
7. The special die for alloy pouring according to claim 6, wherein: the pouring temperature of the step S1 is 1360-1400 ℃.
8. The special die for alloy casting according to claim 6 or 7, wherein: and the aging temperature of the step S2 is 500-550 ℃.
9. The special die for alloy pouring according to claim 8, wherein: and S2, preserving heat for 8-10 h at the aging temperature, and cooling in a furnace to the room temperature.
CN202111050997.8A 2021-09-08 2021-09-08 Castable, preparation method and application thereof Pending CN113881889A (en)

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Citations (5)

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