CN112792306A - A kind of electromagnetic energy medium casting pipe casting equipment - Google Patents
A kind of electromagnetic energy medium casting pipe casting equipment Download PDFInfo
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- CN112792306A CN112792306A CN202110358106.9A CN202110358106A CN112792306A CN 112792306 A CN112792306 A CN 112792306A CN 202110358106 A CN202110358106 A CN 202110358106A CN 112792306 A CN112792306 A CN 112792306A
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- 238000005266 casting Methods 0.000 title claims abstract description 78
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 9
- 238000007670 refining Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 description 11
- 238000005204 segregation Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
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- 239000007788 liquid Substances 0.000 description 4
- 230000006911 nucleation Effects 0.000 description 4
- 238000010899 nucleation Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- 229910000601 superalloy Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D9/00—Machines or plants for casting ingots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
本发明公开了一种电磁能中铸管浇铸装备，包括钢包、第一普通中铸管、电磁中铸管、钢锭模，所述钢包通过阀门与所述第一普通中铸管上端的冒口连接，所述第一普通中铸管与所述电磁中铸管相连接，所述电磁中铸管再通过第二普通中铸管与钢锭模连接，其中所述电磁中铸管包括管体，所述管体外周侧套有电磁线圈。发明的目的是提供一种电磁能中铸管浇铸装备，将电磁能细化晶粒技术应用于优质高合金大钢锭，这样不仅优化了现有工艺，改善了钢锭内部及表面质量，高成材率，还具有设备简单、容易操作的特点。
The invention discloses an electromagnetic energy middle casting pipe casting equipment, comprising a ladle, a first common middle casting pipe, an electromagnetic middle casting pipe and a steel ingot mold. The steel ladle is connected to a riser at the upper end of the first common middle casting pipe through a valve. The first common middle casting pipe is connected with the electromagnetic middle casting pipe, and the electromagnetic middle casting pipe is connected with the steel ingot mold through the second common middle casting pipe, wherein the electromagnetic middle casting pipe comprises a pipe body, An electromagnetic coil is sleeved on the outer periphery of the tube. The purpose of the invention is to provide an electromagnetic energy medium casting pipe casting equipment, which applies the electromagnetic energy refining grain technology to the high-quality high-alloy large steel ingot, which not only optimizes the existing process, improves the internal and surface quality of the steel ingot, and has a high yield. , and also has the characteristics of simple equipment and easy operation.
Description
Technical Field
The invention relates to casting equipment for a cast pipe in electromagnetic energy.
Background
At present, the preparation level of the die-cast steel ingots in China is not in a standstill, so that some of the die-cast steel ingots are widely applied, and high-end die steel, seamless steel pipes, blade steel and the like with high alloy content prepared from the die-cast steel ingots are imported for a long time. For example, in a large ingot of high alloy steel such as P92, columnar crystals and dendrites are formed inside the ingot due to different cooling rates of various parts when the ingot is solidified, and defects such as segregation and shrinkage cavities (porosity) are generated, which greatly affects the quality of subsequent products. Electromagnetic techniques that have been used in ingot casting include electromagnetic stirring techniques, pulsed magnetic oscillation grain refinement techniques, and electromagnetic energy grain refinement techniques. The electromagnetic stirring technology can improve the metal solidification structure and improve the product quality, is applied to continuous casting steel, but has strict requirements on the continuous casting process and higher energy consumption; the pulse magnetic oscillation grain refining technology improves the quality of an upper cast ingot and is low in energy consumption, but the technology only acts on a riser, has little influence on the lower part of the cast ingot and is not suitable for field equipment; at present, the electromagnetic energy grain refining technology has achieved good refining effect on high alloy steel such as aluminum alloy, high manganese steel and the like.
At present, the traditional casting pipe is adopted for diversion casting, the formed cast ingot has large internal crystal grains, the irreversible defects of segregation, cracks, shrinkage cavities (looseness) and the like are generated, the product quality is not over-critical, and huge economic loss is caused.
High alloy steels required by enterprises, such as P91 and P92, contain a large amount of alloy elements such as Al, Ti, Nb and Mo which are easy to segregate, and the segregation of the alloy elements is more serious along with the enlargement of ingot shapes. The high temperature alloy plays an important role in aerospace industry as a high temperature alloy with excellent performance, but further application thereof is limited due to element segregation in the alloy. Therefore, the elimination of elemental segregation has become a critical issue in the production of superalloys.
Disclosure of Invention
The invention aims to provide casting pipe casting equipment in electromagnetic energy, which applies the electromagnetic energy grain refining technology to a high-quality high-alloy large steel ingot, thereby not only optimizing the prior process, improving the internal and surface quality of the steel ingot and achieving high yield, but also having the characteristics of simple equipment and easy operation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to electromagnetic energy medium cast pipe casting equipment which comprises a steel ladle, a first common medium cast pipe, an electromagnetic medium cast pipe and an ingot mold, wherein the steel ladle is connected with a riser at the upper end of the first common medium cast pipe through a valve, the first common medium cast pipe is connected with the electromagnetic medium cast pipe, the electromagnetic medium cast pipe is connected with the ingot mold through a second common medium cast pipe, the electromagnetic medium cast pipe comprises a pipe body, and an electromagnetic coil is sleeved on the outer peripheral side of the pipe body.
Further, the pipe body comprises a stainless steel pipe and a heat insulation material arranged on the inner peripheral wall of the stainless steel pipe.
Further, the stainless steel pipe is made of 316 austenitic stainless steel.
Further, the wall thickness of the stainless steel pipe is 10 mm.
Furthermore, the heat insulation material is a high-temperature resistant heat insulation material (including sand, refractory bricks and the like) commonly used for molten steel pouring.
Further, the thickness of the heat insulation material is 45 millimeters.
Further, the length of the electromagnetic middle casting tube under the action of the magnetic field is 1.5 meters.
Furthermore, the electromagnetic coil is made of red copper, the diameter of the cross section of the electromagnetic coil is 7 mm, and the electromagnetic coil is tightly attached to the outer surface of the pipe body.
Further, the inner diameter of the electromagnetic coil is 310 mm, and the number of coil turns is 856 turns.
Furthermore, the first common middle casting pipe and the electromagnetic middle casting pipe are the same pipe, and a section of electromagnetic coil with a certain length is wound on the first common middle casting pipe to form the electromagnetic middle casting pipe.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention not only optimizes the prior process, improves the quality of the interior and the surface of the steel ingot and has high yield, but also has the characteristics of simple equipment and easy operation
After the electromagnetic energy grain refining technology, the grain size refining rate can reach 20-35%, the segregation degree is reduced, the component uniformity is improved, the segregation index is controlled within 1.1, the central shrinkage cavity (crack) of the ingot is basically eliminated, the columnar crystal in the action area is basically eliminated, and the isometric crystal is basically formed.
By providing energy for the molten steel and promoting nucleation, a large amount of equiaxed crystals are increased, the crystal segregation is reduced, and finally the defects in the background technology are greatly reduced.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of an electromagnetic energy casting apparatus according to the present invention;
FIG. 2 is a schematic cross-sectional view of a cast tube in an electromagnetic system;
FIG. 3 is a two-dimensional plan sectional view of a casting apparatus for casting a cast pipe in electromagnetic energy;
FIG. 4 is a vector diagram of magnetic induction intensity;
FIG. 5 is a cloud of unit magnetic induction densities;
FIG. 6 is a graph of radial path post-processing;
FIG. 7 is an axial path post-processing plot;
description of reference numerals: 1. a ladle; 2. a cap opening; 3. electromagnetic middle cast tube; 301-stainless steel pipe; 302-thermal insulation material; 4. a second common cast tube; 5. a valve; 6. a first common cast tube; 7. an electromagnetic coil; 8. an ingot mold; 9. and (3) molten steel.
Detailed Description
As shown in fig. 1 to 3, an electromagnetic energy medium cast pipe casting device includes a ladle 1, a first common medium cast pipe 6, an electromagnetic medium cast pipe 4, and an ingot mold 8, where the ladle 1 is connected to a riser 2 at an upper end of the first common medium cast pipe 6 through a valve 5, the first common medium cast pipe 6 is connected to the electromagnetic medium cast pipe 3, and the electromagnetic medium cast pipe 3 is connected to the ingot mold 8 through a second common medium cast pipe 4, where the electromagnetic medium cast pipe 3 includes a pipe body, and an electromagnetic coil 7 is sleeved on an outer circumferential side of the pipe body.
The pipe body comprises a stainless steel pipe 301 and a heat insulation material 302 arranged on the inner peripheral wall of the stainless steel pipe 301. The stainless steel pipe 301 is made of 316 austenitic stainless steel. The wall thickness of the stainless steel pipe 301 is 10 mm. The heat insulation material 302 is a high temperature resistant heat insulation material (including sand, refractory bricks and the like) commonly used for molten steel pouring. The thickness of the insulating material 302 is 45 mm. The length of the electromagnetic middle casting tube 2 acted by the magnetic field is 1.5 meters. The electromagnetic coil 7 is made of red copper, the diameter of the cross section of the electromagnetic coil 7 is 7 mm, and the electromagnetic coil 7 is tightly attached to the outer surface of the pipe body. The inner diameter of the electromagnetic coil 7 is 310 mm, and the number of coil turns is 856 turns.
In this embodiment, the first common intermediate casting pipe 6 and the electromagnetic intermediate casting pipe 3 are the same pipe, and the electromagnetic intermediate casting pipe 3 is formed by winding a certain length of electromagnetic coil 7 around the first common intermediate casting pipe 6.
As shown in fig. 2 and 3, the core of the present invention is the design of the electromagnetic coil casting tube, i.e. the electromagnetic coil 7 in the figure, the length of which is L4-1500 mm. The coil is tightly sleeved outside the middle casting tube, and the number of turns of the coil is 856. The sizes of the rest parts are respectively as follows: l1-200 mm, L2-45 mm, L3-2990 mm, L5-100 mm, L6-1710 mm, L7-606.8 mm, L8-2480 mm, L9-1200 mm.
And opening the valve, and allowing the molten steel in the ladle to flow into the common middle casting pipe through the valve and flow into the electromagnetic middle casting pipe through the common middle casting pipe. The molten steel can receive the effect of electromagnetic field in the in-process of flowing through electromagnetic casting pipe, and after the molten steel was acquireed magnetic field energy, its inside atom can take place the vibration to this increases the nucleation ability of molten steel, makes each atom polymerize each other, forms the atomic group of short distance order, promotes the nucleation. The molten steel after the action of the electromagnetic field flows into the ingot mould through the common middle casting pipe until the ingot mould is filled with the molten steel. The molten steel is mostly cooled down by fine isometric crystals in the solidification process, crystal grains are refined, and shrinkage cavities are basically eliminated. And because of the existence of a large amount of equiaxed crystals, the dendrites exist in a small amount, so that the segregation degree is greatly reduced.
The invention has the following use effects:
tables 1 and 2 below illustrate the advantages, features, main performance indexes of the invention and the comparison with the prior art.
TABLE 1
TABLE 2
A computer simulation technology is adopted to analyze the penetration characteristics of an electromagnetic field, and a proper electromagnetic energy device is designed to ensure that the magnetic field intensity in the metal liquid is not lower than 500Gs, so that the grain refinement is realized. Fig. 4 to 7 are simulation results according to characteristics of steel. It is stated that penetration of the magnetic field can be achieved. The device designed by the invention can be deeply inserted into the liquid surface by 100mm, can ensure that molten metal fully forms nuclei, and realizes grain refinement.
According to the research, as long as the magnetic field in the middle casting pipe reaches 10mT, the effective action of electromagnetic energy on the metal liquid can be realized when the action time of the magnetic field is not less than 15s, and the electromagnetic energy is realized to promote nucleation and realize grain refinement. Through the design, calculation and analysis, the distribution of the magnetic field in the metal liquid is more uniform, the effective action volume is larger, the requirement of the cast tube in high-efficiency electromagnetic energy can be completely met, and the efficiency is higher in consideration of the magnetic field and the action time.
Taking ZG ingot as an example, after the electromagnetic energy grain refining technology, the grain size refining rate can reach 20-35%, the looseness and segregation are improved, the component uniformity is improved, the central shrinkage cavity (crack) of the ingot is basically eliminated, the columnar crystal in an action area is basically eliminated, and the isometric crystal proportion is improved.
In addition, the rejection rate can be reduced by utilizing a pouring system of the electromagnetic energy casting technology of the high-quality high-alloy steel large ingot. When the technology is not added originally, the rejection rate is extremely high, and investigation shows that once one grade of steel is rejected, four furnaces of molten steel are wasted, about 80 tons of molten steel cannot reach the enterprise standard, about 2 ten thousand yuan is obtained in one ton of steel in the market, namely 160 ten thousand yuan is lost in enterprises. Reducing the rejection rate reduces enterprise losses.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110358106.9A CN112792306A (en) | 2021-04-01 | 2021-04-01 | A kind of electromagnetic energy medium casting pipe casting equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110358106.9A CN112792306A (en) | 2021-04-01 | 2021-04-01 | A kind of electromagnetic energy medium casting pipe casting equipment |
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| CN112792306A true CN112792306A (en) | 2021-05-14 |
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| CN202110358106.9A Pending CN112792306A (en) | 2021-04-01 | 2021-04-01 | A kind of electromagnetic energy medium casting pipe casting equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633164A (en) * | 1979-08-22 | 1981-04-03 | Mitsubishi Steel Mfg Co Ltd | Manufacture of steel ingot by remelting |
| KR20040092646A (en) * | 2003-04-24 | 2004-11-04 | 강충길 | Forming apparatus of medium and high pressure with speed control condition by using electric stirring |
| CN102802836A (en) * | 2010-03-25 | 2012-11-28 | 西门子Vai金属科技有限责任公司 | Method, casting tube, and continuous casting system for casting a melt made of liquid metal into a continuously cast product |
| CN108273972A (en) * | 2018-03-13 | 2018-07-13 | 内蒙古科技大学 | A kind of device and method of electromagnetic energy crystal grain refinement |
| CN210172516U (en) * | 2019-04-28 | 2020-03-24 | 江苏省沙钢钢铁研究院有限公司 | Tool and die for producing square vacuum ingot |
| CN214442897U (en) * | 2021-04-01 | 2021-10-22 | 内蒙古科技大学 | Electromagnetic energy cast tube casting equipment |
-
2021
- 2021-04-01 CN CN202110358106.9A patent/CN112792306A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5633164A (en) * | 1979-08-22 | 1981-04-03 | Mitsubishi Steel Mfg Co Ltd | Manufacture of steel ingot by remelting |
| KR20040092646A (en) * | 2003-04-24 | 2004-11-04 | 강충길 | Forming apparatus of medium and high pressure with speed control condition by using electric stirring |
| CN102802836A (en) * | 2010-03-25 | 2012-11-28 | 西门子Vai金属科技有限责任公司 | Method, casting tube, and continuous casting system for casting a melt made of liquid metal into a continuously cast product |
| CN108273972A (en) * | 2018-03-13 | 2018-07-13 | 内蒙古科技大学 | A kind of device and method of electromagnetic energy crystal grain refinement |
| CN210172516U (en) * | 2019-04-28 | 2020-03-24 | 江苏省沙钢钢铁研究院有限公司 | Tool and die for producing square vacuum ingot |
| CN214442897U (en) * | 2021-04-01 | 2021-10-22 | 内蒙古科技大学 | Electromagnetic energy cast tube casting equipment |
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