CN114367630A - Coating for rare earth alloyed steel casting die and application thereof - Google Patents
Coating for rare earth alloyed steel casting die and application thereof Download PDFInfo
- Publication number
- CN114367630A CN114367630A CN202111568662.5A CN202111568662A CN114367630A CN 114367630 A CN114367630 A CN 114367630A CN 202111568662 A CN202111568662 A CN 202111568662A CN 114367630 A CN114367630 A CN 114367630A
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- Prior art keywords
- coating
- rare earth
- steel
- percent
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 44
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 40
- 238000005266 casting Methods 0.000 title claims abstract description 37
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000000576 coating method Methods 0.000 title claims abstract description 33
- 239000011247 coating layer Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 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
- 229910000421 cerium(III) oxide Inorganic materials 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
- 238000000227 grinding Methods 0.000 claims abstract description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-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
- 238000003756 stirring Methods 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 42
- 229910052786 argon Inorganic materials 0.000 claims description 21
- 238000005275 alloying Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000010410 layer Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims 1
- 230000007547 defect Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 206010039509 Scab Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a coating for a rare earth alloyed steel casting die and application thereof, and relates to a coating, which comprises the following components in parts by weight: 10.0 to 15.0 percent of Al2O360.0 to 65.0 percent of SiO215.0% -20.0% of La2O34.0 to 6.0 percent of Ce2O3And 3.0 to 5.0 percent of Cr2O3(ii) a Preparing the components of the coating according to a ratio, fully mixing the components, grinding the components into powder of 20-50 mu m, mixing the obtained powder and the mixed liquid according to a mass ratio of 3:2, and stirring the mixture into paste to obtain the coating; coating the rare earth alloyed steel on the inner wall of a rare earth alloyed steel casting die, and curing to obtain the rare earth alloyed steel casting die with the coating layer coated on the inner wall; wherein the components of the mixed liquid by volume are 5-10% of silica sol and 90-95% of absolute ethyl alcohol; the invention can effectively improve the rare earth alloyed steel obtained by pouringThe quality of (c).
Description
Technical Field
The invention relates to a coating, in particular to a coating for a casting mold.
Background
The rare earth alloyed steel is widely applied in the fields of aerospace, ships, electric power and petrochemical industry, rare earth is an element which is easy to oxidize, anti-oxidation protection of alloy steel containing rare earth in the casting process is well done, the key link for ensuring the quality of products is provided, and in the smelting process, the addition of the rare earth can effectively improve the processing performance and the mechanical performance of steel materials. Because the rare earth elements are easy to oxidize, large-particle rare earth oxide inclusions are formed, thereby reducing the mechanical property and the fatigue life of the steel. During die casting, the mold flux in the steel ingot mold is modified under the influence of rare earth elements in molten steel, so that the lubricating effect of the mold flux is seriously reduced, and the surface quality defects of slag inclusion, air holes, scab and the like on the surface of the steel ingot can be caused. The coating is used as an intermediate layer of molten steel and a mold wall, can play a role in regulating and controlling heat transfer and lubricating, reduces the defects of scab and the like, is beneficial to demolding of steel ingots, reduces the defects of scab and the like, increases the yield of the steel ingots, and is widely applied to rare earth high-quality alloy steel, but the coating for the rare earth alloying steel is less in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a coating for a rare earth alloying steel casting die and application thereof, so as to solve the technical problem that the rare earth alloying steel in the prior art is lack of a corresponding coating for casting.
The invention is realized by the following technical scheme:
the coating for the rare earth alloying steel casting die comprises the following components in parts by weight: 10.0 to 15.0 percent of Al2O360.0 to 65.0 percent of SiO215.0% -20.0% of La2O34.0 to 6.0 percent of Ce2O3And 3.0 to 5.0 percent of Cr2O3。
The invention also provides a preparation method of the paint, which comprises the steps of preparing the components of the paint in proportion, fully mixing the components, grinding the mixture into powder of 20-50 mu m, mixing the obtained powder and the mixed liquid in a mass ratio of 3:2, and stirring the mixture into paste to obtain the paint; coating the rare earth alloyed steel on the inner wall of a rare earth alloyed steel casting die, and curing to obtain the rare earth alloyed steel casting die with the coating layer coated on the inner wall; the mixed liquid comprises 5-10% of silica sol and 90-95% of absolute ethyl alcohol by volume.
The invention also provides a method for casting rare earth alloyed steel by using the coating, which comprises the steps of injecting molten steel into the top end of a middle injection pipe from a ladle launching port, enabling the molten steel to sequentially flow through an injection pipe inner cavity and a steel runner brick system and then enter a rare earth alloyed steel casting mould, coating the coating on the inner wall of the rare earth alloyed steel casting mould, forming a coating layer after the coating is solidified, and forming the coating layer when the molten steel is injected into the injection pipe; the top of the middle injection pipe is also provided with an argon protection device, the argon protection device is composed of a circular enclosing plate, a circular supporting plate and an annular baffle, the inner edge of the circular enclosing plate is fixedly connected with the outer edge of the bottom of the circular enclosing plate, the inner edge of the top of the circular enclosing plate is fixedly connected with the outer edge of the circular supporting plate, a heat insulation layer is arranged on the inner wall of the circular enclosing plate, the whole body formed by the circular supporting plate and the annular enclosing plate is sleeved on the top end of the middle injection pipe, the bottom of the circular supporting plate is attached and sealed with the top of the middle injection pipe, an annular air inlet pipe connected with an external argon input device is arranged in the heat insulation layer, upward air outlet holes are uniformly formed in the inner wall of the annular air inlet pipe, and the space surrounded by the annular air inlet pipe is a channel for molten steel to flow; the external argon input device is opened, and the molten steel flows out from the ladle down nozzle after the argon uniformly flows out through the air outlet; a protective slag layer is also arranged in the rare earth alloying steel casting mould before casting.
Compared with the prior art, the invention has the following advantages:
according to the coating for the rare earth alloying steel casting die and the application thereof, the quality of the obtained rare earth alloying steel can be effectively improved through the arrangement of the coating layer.
Drawings
Fig. 1 is a schematic structural diagram of a gating system provided in embodiment 2.
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.
Example 1
The embodiment provides a coating for a rare earth alloyed steel casting die, which comprises the following components in parts by weight: : 10.0 to 15.0 percent of Al2O360.0 to 65.0 percent of SiO215.0% -20.0% of La2O34.0 to 6.0 percent of Ce2O3And 3.0 to 5.0 percent of Cr2O3；
Preparing the components of the coating according to a ratio, fully mixing the components, grinding the components into powder of 20-50 mu m, mixing the obtained powder and the mixed liquid according to a mass ratio of 3:2, and stirring the mixture into paste to obtain the coating; coating the rare earth alloyed steel on the inner wall of a rare earth alloyed steel casting die, and curing to obtain the rare earth alloyed steel casting die with the coating layer 4 coated on the inner wall; wherein the components of the mixed liquid by volume are 5-10% of silica sol and 90-95% of absolute ethyl alcohol;
in the embodiment, the coating layer 4 is arranged, so that the water scouring of the high-temperature steel on the die body can be prevented, and the lubricating effect can be realized; the coating layer 4 can prevent the contact of molten steel and the mold, prevent the molten steel from scouring the ingot mold, and prevent rare earth elements in the molten steel from reacting with the casting powder to generate a large-block and high-melting-point compound, so that the fluidity and the lubricating effect of the casting powder are reduced.
Example 2
With reference to fig. 1, this example provides a casting method of rare earth alloyed steel by using the coating provided in example 1, and a casting system adopted in the casting process is shown in fig. 1, and the concrete steps are as follows: after molten steel is poured into the top end of a middle pouring pipe 1 from a water outlet of a ladle 3, the molten steel sequentially flows through an inner cavity of the middle pouring pipe 1 and a steel flowing brick system 2 and then enters a rare earth alloying steel casting mould, wherein in order to avoid the influence of external air on the molten steel, in the embodiment, an argon protection device is further arranged at the top of the middle pouring pipe 1, the argon protection device is specifically composed of a circular surrounding plate 5, a circular supporting plate 6 with an inner edge fixedly connected with the outer edge of the bottom of the circular surrounding plate 5 and an annular baffle plate 7 with an inner edge fixedly connected with the outer edge of the circular supporting plate 6, a heat insulation layer is arranged on the inner wall of the circular surrounding plate 5, the whole body composed of the circular supporting plate 6 and the annular surrounding plate 7 is sleeved on the top end of the middle pouring pipe 1, the bottom of the circular supporting plate 6 is in fit and sealed with the top of the middle pouring pipe 1, an annular air inlet pipe 8 connected with an external argon input device is arranged in the heat insulation layer, and upward air outlet holes 9 are uniformly arranged on the inner wall of the annular air inlet pipe 8, the space surrounded by the annular air inlet pipe 8 is a channel for molten steel to flow through; the external argon device is opened, and the molten steel flows out from the lower water gap of the ladle 3 after the argon uniformly flows out through the air outlet hole 9; a protective slag layer is also arranged in the rare earth alloying steel casting mould before casting.
The argon protection device covers the top of the middle filling pipe 1, after the external argon input device is opened, the annular air inlet pipe 8 is filled with argon and flows out from the air outlet holes 9, after all the air outlet holes 9 simultaneously flow out of the argon, an argon protection layer is formed on the periphery of the molten steel in the annular air inlet pipe 8, so that the contact between the external air and the molten steel can be effectively isolated, the oxidation reaction of rare earth elements in the molten steel can be avoided, rare earth oxide inclusions can not be generated, the purity of materials can be guaranteed, the rare earth oxide inclusions are D-type inclusions, and by contrast, the content of the D-type inclusions in the materials using the argon protection device can be reduced to be below 1.0 level.
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 (3)
1. The coating for the rare earth alloying steel casting die is characterized by comprising the following components in parts by weight: 10.0 to 15.0 percent of Al2O360.0 to 65.0 percent of SiO215.0% -20.0% of La2O34.0 to 6.0 percent of Ce2O3And 3.0 to 5.0 percent of Cr2O3。
2. A preparation method of the coating of claim 1, which is characterized by comprising the steps of preparing the components of the coating in proportion, fully mixing the components, grinding the components into powder of 20-50 microns, mixing the obtained powder and the mixed liquid in a mass ratio of 3:2, and stirring the mixture until the mixture is pasty to obtain the coating; coating the rare earth alloyed steel on the inner wall of a rare earth alloyed steel casting die, and curing to obtain the rare earth alloyed steel casting die with the coating layer coated on the inner wall; the mixed liquid comprises 5-10% of silica sol and 90-95% of absolute ethyl alcohol by volume.
3. A casting method of rare earth alloying steel by using the coating obtained in claim 2, which comprises the steps of injecting molten steel into the top end of a middle injection pipe from a ladle spout, and then sequentially flowing the molten steel through an inner cavity of the middle injection pipe and a runner brick system and then entering a rare earth alloying steel casting mold, wherein the coating is coated on the inner wall of the rare earth alloying steel casting mold, the coating forms a coating layer after being solidified, and the coating layer is formed when the molten steel is injected into the middle injection pipe; the top of the middle injection pipe is also provided with an argon protection device, the argon protection device is composed of a circular enclosing plate, a circular supporting plate and an annular baffle, the inner edge of the circular enclosing plate is fixedly connected with the outer edge of the bottom of the circular enclosing plate, the inner edge of the top of the circular enclosing plate is fixedly connected with the outer edge of the circular supporting plate, a heat insulation layer is arranged on the inner wall of the circular enclosing plate, the whole body formed by the circular supporting plate and the annular enclosing plate is sleeved on the top end of the middle injection pipe, the bottom of the circular supporting plate is attached and sealed with the top of the middle injection pipe, an annular air inlet pipe connected with an external argon input device is arranged in the heat insulation layer, upward air outlet holes are uniformly formed in the inner wall of the annular air inlet pipe, and the space surrounded by the annular air inlet pipe is a channel for molten steel to flow; the external argon input device is opened, and the molten steel flows out from the ladle down nozzle after the argon uniformly flows out through the air outlet; a protective slag layer is also arranged in the rare earth alloying steel casting mould before casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568662.5A CN114367630A (en) | 2021-12-21 | 2021-12-21 | Coating for rare earth alloyed steel casting die and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568662.5A CN114367630A (en) | 2021-12-21 | 2021-12-21 | Coating for rare earth alloyed steel casting die and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114367630A true CN114367630A (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111568662.5A Pending CN114367630A (en) | 2021-12-21 | 2021-12-21 | Coating for rare earth alloyed steel casting die and application thereof |
Country Status (1)
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| CN (1) | CN114367630A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012247A (en) * | 1983-07-01 | 1985-01-22 | Agency Of Ind Science & Technol | Investment shell mold for unidirectional solidification casting of super alloy |
| CN201500775U (en) * | 2009-09-26 | 2010-06-09 | 湖北新冶钢有限公司 | Protective casting device for Eutech steel mould casting |
| CN102407296A (en) * | 2010-09-25 | 2012-04-11 | 宝山钢铁股份有限公司 | Injection flow protection method and protection device |
| CN104014719A (en) * | 2014-05-09 | 2014-09-03 | 方学军 | High-performance alcohol-base casting paint and production method thereof |
| JP2017119296A (en) * | 2015-12-28 | 2017-07-06 | 新日鐵住金株式会社 | Continuous casting machine and continuous casting method |
| CN107855460A (en) * | 2017-11-08 | 2018-03-30 | 蚌埠市华鼎机械科技有限公司 | A kind of cast paint for lead-acid accumulator cast welding machine surface |
| CN215199577U (en) * | 2021-02-26 | 2021-12-17 | 马鞍山市中桥金属材料有限公司 | System for reducing gas content of molten steel with pH of 17-4 in casting process |
-
2021
- 2021-12-21 CN CN202111568662.5A patent/CN114367630A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012247A (en) * | 1983-07-01 | 1985-01-22 | Agency Of Ind Science & Technol | Investment shell mold for unidirectional solidification casting of super alloy |
| CN201500775U (en) * | 2009-09-26 | 2010-06-09 | 湖北新冶钢有限公司 | Protective casting device for Eutech steel mould casting |
| CN102407296A (en) * | 2010-09-25 | 2012-04-11 | 宝山钢铁股份有限公司 | Injection flow protection method and protection device |
| CN104014719A (en) * | 2014-05-09 | 2014-09-03 | 方学军 | High-performance alcohol-base casting paint and production method thereof |
| JP2017119296A (en) * | 2015-12-28 | 2017-07-06 | 新日鐵住金株式会社 | Continuous casting machine and continuous casting method |
| CN107855460A (en) * | 2017-11-08 | 2018-03-30 | 蚌埠市华鼎机械科技有限公司 | A kind of cast paint for lead-acid accumulator cast welding machine surface |
| CN215199577U (en) * | 2021-02-26 | 2021-12-17 | 马鞍山市中桥金属材料有限公司 | System for reducing gas content of molten steel with pH of 17-4 in casting process |
Non-Patent Citations (1)
| Title |
|---|
| 李树江, 王明杰, 刘建仁, 董泽仙, 卢月美: "用稀土基涂料实现灰铁件表面层石墨球化工艺的研究", 稀土, no. 06, 25 December 1998 (1998-12-25) * |
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