CN114559001B - High-temperature alloy twin-roll casting and rolling process - Google Patents
High-temperature alloy twin-roll casting and rolling process Download PDFInfo
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- CN114559001B CN114559001B CN202210220153.1A CN202210220153A CN114559001B CN 114559001 B CN114559001 B CN 114559001B CN 202210220153 A CN202210220153 A CN 202210220153A CN 114559001 B CN114559001 B CN 114559001B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 74
- 239000000956 alloy Substances 0.000 title claims abstract description 74
- 238000005096 rolling process Methods 0.000 title claims abstract description 41
- 238000005266 casting Methods 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000007547 defect Effects 0.000 claims abstract description 8
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 239000011819 refractory material Substances 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000007711 solidification Methods 0.000 abstract description 11
- 230000008023 solidification Effects 0.000 abstract description 11
- 238000011160 research Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000047 product Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910000601 superalloy Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910001119 inconels 625 Inorganic materials 0.000 description 2
- 229910000816 inconels 718 Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a high-temperature alloy double-roller casting and rolling process, which is used for preparing high-temperature alloy for the first time, and starts from the characteristics of the high-temperature alloy, the casting and rolling process parameters are adjusted from the matching research of casting temperature and cooling speed, so that the defects of bulging, liquid leakage, uneven structure and the like are avoided, meanwhile, the stability of the solidification process is ensured through the control and the periodic detection of vacuum degree, finally, the alloy liquid is poured into a baked tundish and is kept for a period of time, the temperature uniformity of the alloy liquid is facilitated, and the alloy liquid is heated by adopting an electric heating wire embedded in a tundish refractory material, so that the alloy liquid is not polluted while heat is provided. The process after adjustment of the invention can realize casting and rolling production of high-temperature alloys with different components, can improve the production efficiency and reduce the production cost while ensuring the quality requirement of products.
Description
Technical Field
The invention relates to the field of high-temperature alloy preparation, in particular to a high-temperature alloy twin-roll casting and rolling process.
Background
The high-temperature alloy has good high-temperature creep property, excellent corrosion resistance and wear resistance, long-term tissue stability and technological properties, and is widely applied to the fields of aerospace, nuclear power stations, power plants and the like. The traditional high-temperature alloy plate and strip production is to cast metal, then forge cast ingot, hot-roll, weld, cold-roll and the like, and the production process has the disadvantages of large equipment investment, more working procedures, poor surface quality, more cracks, low yield and low production efficiency. In order to improve the production quality and reduce the production cost, development and development of a high-temperature alloy production process with low production cost and high product quality are urgently required.
The double-roller casting and rolling technology is to directly make the metal melt into semi-finished products or finished blank materials. The process is characterized in that the crystallizer is two rotary casting rollers with water cooling systems, the melt undergoes casting, cooling, crystallization, solidification, rolling, blank ejection and other series of process procedures under the cooling and extrusion actions of the rollers, and finally the required plate is obtained, and the process has the advantages of simple production flow, short production period, high efficiency, low energy consumption and the like.
Chinese patent (CN 1486800 a) discloses a continuous casting and rolling technique for bulk amorphous alloy, in which a water-cooled roller is used to cast and roll the bulk amorphous plate strip, bar, etc. under vacuum condition; the method for continuously preparing the nickel-based amorphous alloy thin strip by using the double-roller method in China patent (CN 109822067A) utilizes common industrial raw materials, can provide continuous and stable solidification environment based on a thin strip casting and rolling process, and has the advantages of short amorphous forming process flow, quick cooling and continuous preparation process.
However, because the working conditions of the superalloy have high requirements on quality and performance, the existing preparation process cannot meet the industrial production needs, and although the cast-rolling process has a plurality of advantages, a great deal of research and experiments are also required for the superalloy, and the process of producing and processing the superalloy by adopting the cast-rolling process in the prior art is not reported.
Disclosure of Invention
According to the technical scheme, the method is characterized in that a high-temperature alloy solidification process is analyzed by consulting a literature, and due to the fact that the casting temperature of the high-temperature alloy is high, the defects such as bulging and liquid leakage and the phenomenon of uneven solidification structure can be caused by the existence of a liquid core in the casting and rolling process, in order to overcome the defects, a double-roller casting and rolling process is improved, and the casting and rolling process suitable for high-temperature alloy production is provided, and comprises the following steps:
1) Placing a crucible in a vacuum smelting furnace, placing a high-temperature alloy raw material into the crucible for smelting, and preserving heat for a period of time to ensure that the raw material is completely melted;
2) The tundish, the casting and rolling unit, the cooling and shearing assembly are all arranged in a vacuum protection cover; pouring the completely melted alloy liquid into a baked tundish, standing for a period of time, and arranging a heating device in the tundish to heat and preserve the temperature of the alloy liquid in the tundish;
3) When the temperature of the alloy liquid meets the casting temperature requirement, casting the alloy liquid into a water-cooled roller of a casting-rolling unit to realize casting-rolling forming of the high-temperature alloy;
4) Cooling the product cast-rolled by the casting-rolling machine set to realize the control of the liquid core and avoid the occurrence of defects;
5) And (5) shearing to obtain the finished product.
In the step 1), the melting temperature is the alloy melting point+ (150-250) DEG C, and the heat preservation time is 5-10 min.
In the step 1), the vacuum degree of the vacuum melting furnace is kept at 10 -1 Detecting the vacuum degree every 30s below pa;
in the step 2), the vacuum degree of the vacuum protection cover is kept at 10 -1 Detecting the vacuum degree every 30s below pa;
in the step 2), the tundish heating device is an electric heating wire embedded in the tundish refractory material, and the standing time is 3-5min;
in the step 3), the casting temperature is required to be the alloy melting point plus (150-200) DEG C.
In the step 3), the shape of the water-cooled roller can be adjusted according to the product.
In the step 4), water cooling or air cooling is adopted for cooling, and the cooling speed is more than or equal to 140 ℃/s.
The process is applicable to various high-temperature alloys, such as nickel-based, cobalt-based and iron-based.
Parameters such as rolling pressure, casting speed and the like can be adjusted according to products.
The invention has the technical effects that: according to the invention, a double-roller casting and rolling process is used for preparing the high-temperature alloy for the first time, the casting and rolling process parameters are adjusted from the matching research of casting temperature and cooling speed based on the characteristics of the high-temperature alloy, the defects of bulging, liquid leakage and the like and the phenomenon of uneven solidification structure are avoided, meanwhile, the stability of the solidification process is ensured through controlling the vacuum degree and detecting the period, finally, the alloy liquid is poured into a baked tundish and then is kept for a period of time, the temperature uniformity of the alloy liquid is facilitated, and the alloy liquid is heated by adopting an electric heating wire embedded in a tundish refractory material, so that the alloy liquid is not polluted while heat is provided. The process after adjustment of the invention can realize casting and rolling production of high-temperature alloys with different components, can improve the production efficiency and reduce the production cost while ensuring the quality requirement of products.
Detailed Description
In order to better illustrate the present invention, the technical solution of the present invention is easy to understand, and the present invention is further described in detail below. The following examples are merely illustrative of the present invention and are not intended to represent or limit the scope of the invention as defined in the claims.
Example 1
Aiming at the Inconel 718 alloy, the alloy is produced by adopting a double-roller casting and rolling process, and the concrete steps are as follows: 1) Taking 30kg of Inconel 718 alloy raw material for later use, putting the raw material into a crucible in a vacuum melting furnace for melting, heating to 1500 ℃ and preserving heat for 5min; 2) The tundish, the casting and rolling unit, the cooling and shearing assembly are all arranged in a vacuum protection cover; while the alloy raw material is melted in the step 1), the vacuum protection cover is vacuumized, and the vacuum degree is kept at 10 -1 pouring the completely melted alloy liquid into a bakeout placed in a vacuum protection cover, standing for 5min, and heating and preserving the alloy liquid by adopting a tundish heating device while standing; 3) When the temperature of the alloy liquid reaches 1500 ℃ and the standing time reaches the requirement, casting the alloy liquid into water-cooled rollers of a casting-rolling unit to realize casting-rolling forming of high-temperature alloy; 4) Air cooling is carried out on the product cast-rolled by the casting-rolling machine set, and the cooling speed is 150 ℃/S; 5) And (5) shearing to obtain the finished product.
Comparative example 1.1
Comparative example 1.1 differs from example 1 only in that the cooling rate was 100 deg.c/S.
Comparative example 1.2
Comparative example 1.2 differs from example 1 only in that the alloy liquid was cast into the water-cooled rolls of the casting-rolling mill set at an alloy liquid temperature of 1360 ℃.
Example 2
The manufacturing method adopts a double-roller casting and rolling process to manufacture the Inconel 625 alloy, and comprises the following specific operations: 1) Putting a crucible into a vacuum smelting furnace, putting 25kg of Inconel 625 alloy raw material into the crucible for melting, and heating to 1550 ℃ for 5min; 2) The tundish, the casting and rolling unit, the cooling and shearing assembly are all arranged in a vacuum protection cover; while the alloy raw material is melted in the step 1), the vacuum protection cover is vacuumized, and the vacuum degree is kept at 10 -1 pouring the completely melted alloy liquid into a bakeout placed in a vacuum protection cover below pa, standing for 4min, and heating and preserving the alloy liquid by adopting a tundish heating device while standing; 3) When the temperature of the alloy liquid reaches 1520 ℃ and the standing time reaches the requirement, casting the alloy liquid into water-cooled rollers of a casting-rolling unit to realize casting-rolling forming of high-temperature alloy; 4) Water cooling is carried out on the product cast-rolled by the casting-rolling machine set, and the cooling speed is 160 ℃/S; 5) And (5) shearing to obtain the finished product.
Comparative example 2.1
Comparative example 2.1 differs from example 2 only in that the cooling rate was 120 deg.c/S.
Comparative example 2.2
Comparative example 2.2 differs from example 2 only in that the alloy liquid was cast into the water-cooled rolls of the casting-rolling mill set at an alloy liquid temperature of 1400 ℃.
The high temperature alloy samples prepared by the examples 1-2 and the comparative examples 1.1-1.2 and 2.1-2.2 were tested and analyzed, and the results are shown in Table 1.
From the detection results, it can be seen that: the high-temperature alloy prepared by adopting the double-roller casting and rolling process with the temperature range of the alloy liquid and the cooling speed range being matched and other processes and parameters thereof has the advantages of no bulge, liquid leakage and other defects, uniform solidification structure and meeting the basic quality requirement of the high-temperature alloy. The alloy liquid temperature range limited by the invention, the cooling speed range limited by the invention or the alloy liquid temperature range limited by the invention and the cooling speed range limited by the invention are matched with the high-temperature alloy prepared by other processes and parameters thereof, the phenomena of bulging, liquid leakage and the like and uneven distribution of solidification structures (such as comparative examples 1.1 and 2.1) can occur, and the defects of bulging, liquid leakage and the like can not occur in some comparative examples (such as comparative examples 1.2 and 2.2), but the difference of solidification speeds at different parts of the high-temperature alloy is larger due to the mismatching of casting temperature and cooling speed, so that the phenomenon of uneven distribution of solidification structures is caused, and the basic quality requirement of the high-temperature alloy is not met.
Table 1 inventive and comparative examples preparation process and properties
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (2)
1. The high-temperature alloy twin-roll casting and rolling process is characterized by comprising the following steps of:
1) Placing a crucible in a vacuum melting furnace, placing a high-temperature alloy raw material into the crucible for melting, wherein the melting temperature is the alloy melting point+ (150-250), and preserving heat for 5-10min to ensure that the raw material is completely melted; the vacuum degree of the vacuum smelting furnace is kept at 10 -1 Detecting the vacuum degree every 30s below pa;
2) The tundish, the casting and rolling unit, the cooling and shearing assembly are all arranged in a vacuum protection cover; pouring the completely melted alloy liquid into a baked tundish, standing for 3-5min, and arranging a heating device in the tundish to heat and preserve heat of the alloy liquid in the tundish; the heating device is an electric heating wire embedded in the tundish refractory material; the vacuum degree of the vacuum protection cover is kept at 10 -1 Detecting the vacuum degree every 30s below pa;
3) When the temperature of the alloy liquid meets the casting temperature requirement, casting the alloy liquid into a water-cooled roller of a casting-rolling unit to realize casting-rolling forming of the high-temperature alloy; the casting temperature requirement means that the temperature of alloy liquid is alloy melting point+ (150-200) DEG C;
4) The product cast-rolled by the casting-rolling machine set is cooled, water cooling or air cooling is adopted for cooling, the cooling speed is more than or equal to 140 ℃/s, the control of a liquid core is realized, and the occurrence of defects is avoided;
5) And (5) shearing to obtain the finished product.
2. The process according to claim 1, wherein in the step 3), the shape of the water-cooled roll is adjusted according to the product.
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| CN202210220153.1A CN114559001B (en) | 2022-03-08 | 2022-03-08 | High-temperature alloy twin-roll casting and rolling process |
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| CN202210220153.1A CN114559001B (en) | 2022-03-08 | 2022-03-08 | High-temperature alloy twin-roll casting and rolling process |
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| CN114559001B true CN114559001B (en) | 2024-04-12 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04176850A (en) * | 1990-06-29 | 1992-06-24 | Kawasaki Steel Corp | Production of superalloy thin strip |
| US5665180A (en) * | 1995-06-07 | 1997-09-09 | The United States Of America As Represented By The Secretary Of The Air Force | Method for hot rolling single crystal nickel base superalloys |
| CN101817071A (en) * | 2009-10-30 | 2010-09-01 | 兰州理工大学 | Electric pulse casting and rolling method of semi-solid alloy |
| CN205165782U (en) * | 2015-08-17 | 2016-04-20 | 共慧冶金设备科技(苏州)有限公司 | Aluminium alloy wire casts system of rolling in succession |
| CN109092895A (en) * | 2018-06-27 | 2018-12-28 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar continuous casting and rolling system and reinforcing bar continuous casting and tandem rolling production method |
| CN208357467U (en) * | 2018-06-27 | 2019-01-11 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar casting system |
| CN109822067A (en) * | 2019-04-08 | 2019-05-31 | 东北大学 | A kind of method that Ni-based non-crystalline thin-band is continuously prepared |
| CN109967703A (en) * | 2019-04-08 | 2019-07-05 | 东北大学 | A method of with a thickness of 80~1500 μm of wide cut amorphous thin ribbons, continuously big cooling rate is efficiently prepared |
| CN209811186U (en) * | 2019-04-08 | 2019-12-20 | 东北大学 | Casting and rolling device for continuous large-cooling-speed preparation of wide amorphous thin strip |
| WO2020206610A1 (en) * | 2019-04-08 | 2020-10-15 | 东北大学 | Continuous preparation method for zirconium based amorphous thin strip |
-
2022
- 2022-03-08 CN CN202210220153.1A patent/CN114559001B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04176850A (en) * | 1990-06-29 | 1992-06-24 | Kawasaki Steel Corp | Production of superalloy thin strip |
| US5665180A (en) * | 1995-06-07 | 1997-09-09 | The United States Of America As Represented By The Secretary Of The Air Force | Method for hot rolling single crystal nickel base superalloys |
| CN101817071A (en) * | 2009-10-30 | 2010-09-01 | 兰州理工大学 | Electric pulse casting and rolling method of semi-solid alloy |
| CN205165782U (en) * | 2015-08-17 | 2016-04-20 | 共慧冶金设备科技(苏州)有限公司 | Aluminium alloy wire casts system of rolling in succession |
| CN109092895A (en) * | 2018-06-27 | 2018-12-28 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar continuous casting and rolling system and reinforcing bar continuous casting and tandem rolling production method |
| CN208357467U (en) * | 2018-06-27 | 2019-01-11 | 湖南三泰新材料股份有限公司 | A kind of reinforcing bar casting system |
| CN109822067A (en) * | 2019-04-08 | 2019-05-31 | 东北大学 | A kind of method that Ni-based non-crystalline thin-band is continuously prepared |
| CN109967703A (en) * | 2019-04-08 | 2019-07-05 | 东北大学 | A method of with a thickness of 80~1500 μm of wide cut amorphous thin ribbons, continuously big cooling rate is efficiently prepared |
| CN209811186U (en) * | 2019-04-08 | 2019-12-20 | 东北大学 | Casting and rolling device for continuous large-cooling-speed preparation of wide amorphous thin strip |
| WO2020206610A1 (en) * | 2019-04-08 | 2020-10-15 | 东北大学 | Continuous preparation method for zirconium based amorphous thin strip |
| WO2020206611A1 (en) * | 2019-04-08 | 2020-10-15 | 东北大学 | METHOD FOR CONTINUOUS AND HIGH-EFFICIENT PREPARATION OF WIDE AMORPHOUS THIN STRIP HAVING THICKNESS OF 80-1,500 μM AT HIGH COOLING SPEED |
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