CN114082882A - Casting die of high-strength flat section steel - Google Patents
Casting die of high-strength flat section steel Download PDFInfo
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- CN114082882A CN114082882A CN202111570032.1A CN202111570032A CN114082882A CN 114082882 A CN114082882 A CN 114082882A CN 202111570032 A CN202111570032 A CN 202111570032A CN 114082882 A CN114082882 A CN 114082882A
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- casting
- die
- casting die
- width
- mold
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- 238000005266 casting Methods 0.000 title claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000009991 scouring Methods 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 claims abstract description 4
- QDOXWKRWXJOMAK-UHFFFAOYSA-N chromium(III) oxide Inorganic materials O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 4
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 4
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011247 coating layer Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
- B22D7/066—Manufacturing, repairing or reinforcing ingot moulds
- B22D7/068—Manufacturing, repairing or reinforcing ingot moulds characterised by the materials used therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a casting die for high-strength flat steel, which relates to a die and comprises a casting die body, and is characterized in that the inner wall of the casting die body is coated with a scouring-resistant coating, and the scouring-resistant coating comprises the following components in parts by weight: 20.0 to 25.0 percent of Al2O355.0 to 60.0 percent of SiO210.0% -15.0% of CaF23.0 to 5.0 percent of Cr2O3And 3.0 to 5.0 percent of Fe2O3(ii) a The invention can effectively prolong the service life of the die body and improve the surface quality of the obtained steel ingot.
Description
Technical Field
The invention relates to a mold, in particular to a casting mold for flat steel.
Background
In the fields of aerospace, ships, electric power and petrochemical industry, the quality of high-strength flat steel pouring is closely related to the quality of the ingot mold. The design of the steel ingot mould and the protection of the coating are crucial in the process of pouring molten steel, the design of the steel ingot mould is unreasonable, the defects of shrinkage cavity, looseness and the like of the center of a steel ingot are easily caused, the coating is used as a middle layer of the molten steel and a mould wall in the process of pouring, the function of regulating and controlling heat transfer is played, the thermal shock of the molten steel to the wall of the steel ingot mould can be reduced, the solidification quality of the steel ingot can be improved, the service life of the steel ingot mould can be prolonged, the defects of steel ingot demoulding, scab reduction and the like are facilitated, and the yield of the steel ingot is increased. In the ingot production process, the service life of the ingot mould is reduced due to the defects of the ingot mould, the structural adhesion of the ingot mould and the like, the surface quality of the ingot is influenced, the problems are increasingly seriously influenced along with the strengthening of the smelting process and the improvement of the ingot casting speed, and the method for solving the problems comprises the steps of improving the structure of the ingot mould, spraying a layer of proper coating on the inner surface wall of the ingot mould, protecting the mould wall and being beneficial to improving the quality of the ingot mould.
The steel ingot adopts the bottom pouring type to cast, the flat steel ingot mould is limited by the size, the space of a water gap is small, the steel ingot is easily eroded by molten steel near the lower water gap of the steel ingot mould, a steel bump is generated on the steel ingot at the erosion position, the steel ingot is clamped in the steel ingot mould by the raised steel bump, the demoulding of the steel ingot is difficult, the steel ingot mould is scrapped in severe cases, and the production cost is increased. In order to ensure the compression ratio of the subsequent rolling of the flat steel ingot, the difference between the upper width and the lower width of the flat steel ingot mold is not easy to be overlarge, and the overlarge difference can cause the defects of central shrinkage cavity, central looseness and the like of the steel ingot.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a casting mold for high-strength flat steel so as to improve the surface quality of steel ingots and prolong the service life of the ingot mold.
The invention is realized by the following technical scheme:
the utility model provides a casting die of high-strength flat shaped steel, includes the casting die body, its characterized in that, scribble on the casting die body inner wall and wash-resistant the dope layer, wash-resistant the component by weight of dope layer is: 20.0 to 25.0 percent of Al2O355.0 to 60.0 percent of SiO210.0% -15.0% of CaF23.0 to 5.0 percent of Cr2O3And 3.0 to 5.0 percent of Fe2O3。
Further, the preparation method of the scouring-resistant coating layer comprises the following steps: preparing the components of the scouring-resistant coating layer according to a proportion, fully mixing the components, grinding the mixture into powder of 20-50 microns, mixing the obtained powder and the mixed liquid according to a mass ratio of 2:1, stirring the mixture into paste, coating the paste on the inner wall of the casting mold body, and casting the paste after curing; the mixed liquid comprises 5-10% of silica sol and 90-95% of absolute ethyl alcohol by volume.
Further, the casting die body is integrally cast by cast iron, and the ratio of the width in the die to the thickness in the die of the upper opening of the casting die body is 5-5.5; the ratio of the in-mold width of the lower opening of the casting mold body to the in-mold thickness is 5.5-6; the ratio of the inner width of the upper opening die to the inner width of the lower opening die of the casting die body is 1.04-1.07; and two water outlets which are respectively communicated with the inner cavity of the casting die body are formed at the bottom of the casting die body.
Further, the inner width of the upper opening die, the inner thickness of the upper opening die, the inner width of the lower opening die and the inner thickness of the lower opening die of the casting die body are 890-900 mm, 165-175 mm, 845-855 mm and 145-155 mm in sequence, the inner diameters of the upper opening and the lower opening of the lower water opening are 90-95 mm and 105-110 mm in sequence, and the distance between the two lower water openings is 300-310 mm.
Compared with the prior art, the invention has the following advantages:
according to the casting mould for the high-strength flat section steel, the erosion-resistant coating layer is coated on the inner wall of the casting mould body, so that the refractoriness of the ingot mould is enhanced, the inner wall of the ingot mould is prevented from being damaged by sudden thermal stress during steel casting, and the service life of the ingot mould is prolonged; the two lower water gaps are formed in the bottom of the casting die body, and when molten steel is cast, the molten steel flows into the steel ingot die from the two lower water gaps synchronously, so that the temperature of the molten steel in the die is uniform, partial temperature difference is not large, the cast steel ingot is uniformly solidified, and the central quality of the steel ingot is improved.
Drawings
Fig. 1 is a front view of an internal structure of a pouring device for electroslag remelting according to an embodiment;
fig. 2 is a side view of an internal structure of a pouring device for electroslag remelting according to an embodiment.
In the figure: 1. casting the mould body; 2. a water outlet; 3. and (4) a scouring-resistant coating layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
With reference to fig. 1 and 2, the present embodiment provides a casting mold for high-strength flat steel, including a casting mold body 1, in order to effectively improve the quality of the prepared flat steel and avoid the defects of central shrinkage and central porosity of the obtained flat steel, in the present embodiment, firstly, the casting mold body 1 is integrally cast by cast iron, and secondly, the ratio of the in-mold width of the upper opening of the casting mold body 1 to the in-mold thickness is 5-5.5; the ratio of the in-mold width of the lower opening of the casting mold body 1 to the in-mold thickness is 5.5-6; the ratio of the inner width of an upper opening die to the inner width of a lower opening die of the casting die body 1 is 1.04-1.07; two water outlets 2 communicated with the inner cavity of the casting mould body 1 are formed in the bottom of the casting mould body.
The arrangement of the two lower water gaps 2 is adopted, so that molten steel synchronously flows into the casting mold body 1 through the two lower water gaps 2 during casting, the temperature of the molten steel in the mold can be uniform, the phenomenon that the local temperature difference is larger can not occur, the cast steel ingot is uniformly solidified, the center quality of the steel ingot is improved, the ratio of the width of the upper opening mold of the casting mold body 1 to the width of the lower opening mold is set, the deformation of the casting mold body 1 in the casting process is close to the same, and the quality of the obtained steel ingot can be effectively guaranteed.
Specifically, in this embodiment, the width in the upper die, the thickness in the upper die, the width in the lower die and the thickness in the lower die of the casting die body 1 are 890mm to 900mm, 165mm to 175mm, 845mm to 855mm and 145mm to 155mm in sequence, the inner diameter of the upper opening and the inner diameter of the lower opening of the lower nozzle 1 are 90mm to 95mm and 105mm to 110mm in sequence, and the distance between the two lower nozzles 1 is 300mm to 310 mm.
Specifically, in this embodiment, the inner width of the upper die, the inner thickness of the upper die, the inner width of the lower die and the inner thickness of the lower die of the casting die body 1 are 895mm, 170mm, 850mm and 150mm in sequence, the inner diameters of the upper opening and the lower opening of the lower nozzle 1 are 90mm and 108mm in sequence, and the distance between the two lower nozzles 1 is 305 mm; the height of the casting mould body 1 is 1850 mm.
In particular, in order to increase the refractoriness of the casting die body 1, in this embodiment, a wash-resistant coating layer 3 is coated on the inner wall of the casting die body 1, and the wash-resistant coating layer 3 comprises the following components by weight: 20.0 to 25.0 percent of Al2O355.0 to 60.0 percent of SiO210.0% -15.0% of CaF23.0 to 5.0 percent of Cr2O3And 3.0 to 5.0 percent of Fe2O3When the anti-scouring coating material is used, the components of the anti-scouring coating layer 3 are prepared according to the proportion, fully mixed and ground into powder of 20-50 mu m, then the obtained powder and the mixed liquid are mixed according to the mass ratio of 2:1, stirred to be pasty and smeared on the inner wall of a casting mold body 1, and the casting can be carried out after solidification; the mixed liquid comprises 5-10% of silica sol and 90-95% of absolute ethyl alcohol by volume.
The erosion-resistant coating layer 3 provided by the embodiment has good cohesive force under a high-temperature condition, can be firmly attached to the surface of the ingot mold, enhances the refractoriness of the ingot mold, prevents the inner wall of the ingot mold from being damaged by sudden thermal stress during steel casting, and prolongs the service life of the ingot mold.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a casting die of high-strength flat shaped steel, includes casting die body (1), its characterized in that, scribble on casting die body (1) inner wall and wash-resistant dope layer (3), the component that wash-resistant dope layer (3) by weight is: 20.0 to 25.0 percent of Al2O355.0 to 60.0 percent of SiO210.0% -15.0% of CaF23.0 to 5.0 percent of Cr2O3And 3.0 to 5.0 percent of Fe2O3。
2. The casting mold of high-strength flat steel according to claim 1, wherein the preparation method of the erosion-resistant coating layer (3) comprises the following steps: preparing the components of the scouring-resistant coating layer (3) according to a proportion, fully mixing the components, grinding the mixture into powder of 20-50 microns, mixing the obtained powder and the mixed liquid according to a mass ratio of 2:1, stirring the mixture into paste, coating the paste on the inner wall of the casting mold body (1), and casting the paste after curing; the mixed liquid comprises 5-10% of silica sol and 90-95% of absolute ethyl alcohol by volume.
3. The casting die of the high-strength flat section steel according to claim 2, characterized in that the casting die body (1) is integrally cast by cast iron, and the ratio of the in-die width of the upper opening of the casting die body (1) to the in-die thickness is 5-5.5; the ratio of the in-mold width of the lower opening of the casting mold body (1) to the in-mold thickness is 5.5-6; the ratio of the inner width of the upper opening die to the inner width of the lower opening die of the casting die body (1) is 1.04-1.07; the bottom of the casting die body (1) is provided with two water outlets (2) which are respectively communicated with the inner cavity of the casting die body.
4. The casting die of high-strength flat steel according to claim 3, characterized in that the width in the upper die, the thickness in the upper die, the width in the lower die and the thickness in the lower die of the casting die body (1) are 890 mm-900 mm, 165 mm-175 mm, 845 mm-855 mm and 145 mm-155 mm in sequence, the inner diameter of the upper opening and the inner diameter of the lower opening of the lower nozzle (2) are 90 mm-95 mm and 105 mm-110 mm in sequence, and the distance between the two lower nozzles (2) is 300 mm-310 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570032.1A CN114082882A (en) | 2021-12-21 | 2021-12-21 | Casting die of high-strength flat section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570032.1A CN114082882A (en) | 2021-12-21 | 2021-12-21 | Casting die of high-strength flat section steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114082882A true CN114082882A (en) | 2022-02-25 |
Family
ID=80307872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111570032.1A Withdrawn CN114082882A (en) | 2021-12-21 | 2021-12-21 | Casting die of high-strength flat section steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114082882A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341102A (en) * | 2022-08-30 | 2022-11-15 | 二重（德阳）重型装备有限公司 | Integrated electrode blank casting mould of large electroslag remelting furnace |
-
2021
- 2021-12-21 CN CN202111570032.1A patent/CN114082882A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341102A (en) * | 2022-08-30 | 2022-11-15 | 二重（德阳）重型装备有限公司 | Integrated electrode blank casting mould of large electroslag remelting furnace |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220225 |
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| WW01 | Invention patent application withdrawn after publication |