CN114888272A - Preparation method of novel casting ladle for investment casting - Google Patents
Preparation method of novel casting ladle for investment casting Download PDFInfo
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- CN114888272A CN114888272A CN202210542470.5A CN202210542470A CN114888272A CN 114888272 A CN114888272 A CN 114888272A CN 202210542470 A CN202210542470 A CN 202210542470A CN 114888272 A CN114888272 A CN 114888272A
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- casting
- ladle
- casting ladle
- zircon powder
- silica sol
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a preparation method of a novel casting ladle for investment casting, which comprises the following steps: preparing a bag body material: putting the prepared silica sol and the refractory material into a stirrer to be uniformly stirred until no agglomeration exists; preparing zircon powder coating: mixing the proportioned zircon powder, silica sol, wetting agent and defoaming agent together, fully stirring, and finishing curing; attaching and fixing a bag body material on the inner wall of the stainless steel shell in a knocking mode to form a bag body layer; brushing zircon powder coating on the ladle layer to form a zircon powder coating layer to obtain a casting ladle blank; and (4) sequentially airing, baking and casting the casting ladle blank to obtain a casting ladle finished product. The invention can improve the surface finish of the casting ladle and the self high-temperature strength of the casting ladle, not only improves the use effect of the casting ladle, but also prolongs the service life of the casting ladle and increases the use times of the casting ladle, thereby effectively reducing the integral use cost of the casting ladle in the smelting and casting process.
Description
Technical Field
The invention belongs to the field of investment casting, relates to a casting ladle preparation technology, and particularly relates to a preparation method of a novel casting ladle for investment casting.
Background
The investment casting is to finally obtain the part through the production processes of wax pattern making, shell making, smelting pouring, cleaning and heat treatment. The smelting and pouring are that after metal is melted and refined in an electric furnace, the metal is poured into a roasted casting ladle, and then the molten metal is poured into a mould shell through the casting ladle.
The existing ladle comprises a stainless steel shell and a ladle body layer two parts positioned in the stainless steel shell, the ladle body layer is in direct contact with high-temperature molten metal, the raw materials of the existing ladle body layer are water glass and refractory materials, and the water glass and the refractory materials are stirred and then fixed in the stainless steel shell to form the ladle body layer, so that some problems exist in the actual use process, and the ladle body layer is specifically as follows:
1. due to the high modulus of the water glass binder, the gel precipitation speed and the gel shrinkage during the hardening reaction are strong, surface deformation can be caused, the surface of the inclusion layer can crack or even peel off, the inclusion material of the inclusion layer can fall off under the impact of the molten metal during pouring, the inclusion material is mixed into the molten metal and finally poured into a product, and product defects are formed.
2. Due to the characteristics of the water glass, bumps and pits are easy to appear on the surface of the finally formed bag body layer, so that the surface finish is very poor, and the market competitiveness of the product is seriously influenced.
3. Due to the above problem 1, the service life of the conventional ladle is generally short, and the conventional ladle can be used for 3 times at most and needs to be replaced, so that the cost of the smelting and pouring process is relatively high.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the preparation method of the novel casting ladle for investment casting is provided, the surface smoothness of the casting ladle can be improved, the self high-temperature strength of the casting ladle is improved, the using effect of the casting ladle is improved, the service life of the casting ladle is prolonged, the using times of the casting ladle are increased, and therefore the integral using cost of the casting ladle in the smelting and pouring process is effectively reduced.
The technical scheme is as follows: in order to achieve the aim, the invention provides a preparation method of a novel casting ladle for investment casting, which comprises the following steps:
s1: preparing a bag body material:
putting the prepared silica sol and the refractory material into a stirrer to be uniformly stirred until no agglomeration exists;
s2: preparing zircon powder coating:
mixing the proportioned zircon powder, silica sol, wetting agent and defoaming agent together, fully stirring and curing;
s3: attaching and fixing the bag body material in the step S1 on the inner wall of the stainless steel shell in a knocking mode to form a bag body layer;
s4: brushing the zircon powder coating of the step S2 on the inclusion layer to form a zircon powder coating layer to obtain a casting ladle blank;
s5: and (4) sequentially airing, baking and casting the casting ladle blank to obtain a casting ladle finished product.
Further, in the step S1, the weight percentage of the silica sol in the refractory material is in a range of 3% to 5%.
Further, in the step S2, the zircon powder, the silica sol, the wetting agent and the defoaming agent are sorted according to parts by weight as follows:
8-10 parts of zircon powder, 2-3 parts of silica sol, 1-3 parts of wetting agent and 0.8-2 parts of defoaming agent.
Furthermore, the airing time in the step S5 is more than or equal to 12 hours.
Further, the baking temperature in the step S5 is 1050 +/-200 ℃, and the baking time is 45-60 min.
Further, the preheating time of the casting in the step S5 is 15-20 min.
The innovation points of the invention include two points, which are as follows:
1) the binder of the bag body material is changed from water glass to silica sol.
Compared with water glass, the silica sol has strong adhesive capacity and high temperature resistance, and improves the high-temperature strength of the casting ladle. After the casting ladle is roasted and in the casting use process, the ladle body is not easy to crack or peel, so that impurities are prevented from being doped into the molten metal in the casting ladle, and the product defects caused after casting are reduced.
2) The special zirconium powder paint is brushed on the inner wall of the envelope layer.
After the surface zircon powder is roasted, the strength is increased, a protective layer can be formed on the surface of the bag body, the impact of the metal liquid on the bag body is buffered, and the risk of cracking and peeling of the bag body is reduced; the surface finish is good after the zircon powder coating is brushed, the capability of resisting high-temperature molten metal etching of the casting ladle is improved, and the defects caused by etching of the casting ladle material are reduced.
Has the advantages that: compared with the prior art, the invention replaces the prior water glass with the silica sol, and is matched with the brushing of the specially prepared zircon powder coating, and compared with the prior casting ladle, the casting ladle prepared by the invention has the following advantages:
1. the surface smoothness of the ladle body layer of the casting ladle is greatly improved, the corrosion resistance is high, and the market competitiveness of products is obviously improved.
2. The high-temperature strength and the refractoriness of the ladle layer of the ladle are greatly improved, the problem that the surface of the existing ladle layer is easy to crack and even peel is solved, the situation that the ladle material falls and is mixed into the molten metal to cause defects of the product is avoided, and the quality of the product is effectively improved and guaranteed.
3. The service life of the casting ladle is effectively prolonged, so that the use frequency of a single casting ladle is increased, and the integral use cost of the casting ladle in the smelting and pouring process is effectively reduced.
Drawings
FIG. 1 is a schematic view showing a comparison between a conventional ladle and a ladle according to the present invention before baking and pouring in the present example;
FIG. 2 is a schematic view showing a comparison between a conventional ladle and a ladle of the present invention after baking and pouring in this example;
FIG. 3 is a schematic view showing the comparison between the number of times of use and the corresponding state of use of the conventional ladle and the ladle of the present invention in this embodiment.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
Example 1:
the embodiment provides a preparation method of a novel casting ladle for investment casting, which comprises the following steps:
s1: preparing a bag body material:
putting the prepared silica sol and the corundum powder in a stirrer to be uniformly stirred until no agglomeration exists;
the weight parts of the silica sol and the corundum powder are respectively 3 parts and 100 parts.
S2: preparing zircon powder coating:
mixing the proportioned zircon powder, silica sol, wetting agent and defoaming agent together, fully stirring, and finishing curing;
the parts by weight of the zircon powder, the silica sol, the wetting agent and the defoaming agent are 8 parts of zircon powder, 2 parts of silica sol, 1 part of wetting agent and 0.8 part of defoaming agent respectively.
S3: attaching and fixing the bag body material in the step S1 on the inner wall of the stainless steel shell in a knocking mode to form a bag body layer;
s4: brushing the zircon powder coating of the step S2 on the inclusion layer to form a zircon powder coating layer to obtain a casting ladle blank;
s5: and (4) sequentially airing, baking and casting the casting ladle blank to obtain a casting ladle finished product.
The air drying time is more than or equal to 12h, the baking temperature is 1050 ℃, the time is 45min, and the preheating time for pouring is 15 min.
Example 2:
the embodiment provides a preparation method of a novel casting ladle for investment casting, which comprises the following steps:
s1: preparing a bag body material:
putting the prepared silica sol and mullite powder in a stirrer, and uniformly stirring until no agglomeration exists;
the weight parts of the silica sol and the mullite powder are 5 parts and 100 parts respectively.
S2: preparing zircon powder coating:
mixing the proportioned zircon powder, silica sol, wetting agent and defoaming agent together, fully stirring, and finishing curing;
the parts by weight of the zircon powder, the silica sol, the wetting agent and the defoaming agent are 10 parts of zircon powder, 3 parts of silica sol, 3 parts of wetting agent and 2 parts of defoaming agent respectively.
S3: attaching and fixing the bag body material in the step S1 on the inner wall of the stainless steel shell in a knocking mode to form a bag body layer;
s4: brushing the zircon powder coating of the step S2 on the inclusion layer to form a zircon powder coating layer to obtain a casting ladle blank;
s5: and (4) sequentially airing, baking and casting the casting ladle blank to obtain a casting ladle finished product.
The air drying time is more than or equal to 12h, the baking temperature is 1150 ℃, the time is 60min, and the preheating time for pouring is 20 min.
Example 3:
in this example, the ladle obtained in example 1 or example 2 was compared with an existing ladle as follows:
FIG. 1 is a comparison between the prior art ladle and the ladle obtained in example 1 before baking and pouring, and it can be seen that the ladle obtained in example 1 has better surface finish, no bumps and pits, the whole inner wall and the neck of the ladle are intact, and no stripping of lumps occurs, while the prior art ladle has poor surface finish and obvious bumps and pits.
FIG. 2 is a comparison of the ladle obtained in example 1 and the ladle in the prior art after baking and pouring, and it can be seen that the peeling of the ladle material occurs in the prior art after baking and pouring, while the inner wall and the neck of the ladle in example 1 are intact and the ladle has no cracks or peeling.
Example 4:
in order to further verify the use effect and quality of the ladle obtained in example 1, the ladle obtained in example 1 and the existing ladle were used in the same smelting and casting process, and the use state of the ladle at each time was recorded by shooting, specifically as shown in fig. 3, it can be seen that the service life of the ladle in the prior art was 3 times, and the ladle body was severely cracked and peeled off during use, while the service life of the ladle obtained in the present invention was 5 times, and the ladle body was slightly cracked but not peeled off after the fourth use.
Therefore, the casting ladle provided by the invention can improve the use effect, and the service life of each casting ladle can be prolonged from 3 times to 5 times at least, so that the overall use cost of the casting ladle in the smelting and pouring process is effectively reduced.
Claims (6)
1. A preparation method of a novel casting ladle for investment casting is characterized by comprising the following steps:
s1: preparing a bag body material:
putting the prepared silica sol and the refractory material into a stirrer to be uniformly stirred until no agglomeration exists;
s2: preparing zircon powder coating:
mixing the proportioned zircon powder, silica sol, wetting agent and defoaming agent together, fully stirring, and finishing curing;
s3: attaching and fixing the bag body material in the step S1 on the inner wall of the stainless steel shell in a knocking mode to form a bag body layer;
s4: brushing the zircon powder coating of the step S2 on the inclusion layer to form a zircon powder coating layer to obtain a casting ladle blank;
s5: and (4) sequentially airing, baking and casting the casting ladle blank to obtain a casting ladle finished product.
2. The method of claim 1, wherein the silica sol is present in an amount ranging from 3% to 5% by weight of the refractory material in step S1.
3. The method of claim 1, wherein the zircon powder, the silica sol, the wetting agent and the defoaming agent in step S2 are arranged in the following order by weight:
8-10 parts of zircon powder, 2-3 parts of silica sol, 1-3 parts of wetting agent and 0.8-2 parts of defoaming agent.
4. The method for preparing the novel ladle for investment casting according to claim 1, wherein the time for airing in step S5 is not less than 12 hours.
5. The method of claim 1, wherein the baking in step S5 is performed at 1050 ± 200 ℃ for 45-60 min.
6. The method of claim 1, wherein the preheating time of the casting in the step S5 is 15-20 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542470.5A CN114888272A (en) | 2022-05-18 | 2022-05-18 | Preparation method of novel casting ladle for investment casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210542470.5A CN114888272A (en) | 2022-05-18 | 2022-05-18 | Preparation method of novel casting ladle for investment casting |
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| CN114888272A true CN114888272A (en) | 2022-08-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383101A (en) * | 2022-08-15 | 2022-11-25 | 东风精密铸造有限公司 | Heat-preservation pouring ladle for investment casting |
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| KR101709780B1 (en) * | 2016-06-02 | 2017-02-23 | 주식회사 동국알앤에스 | Manufacturing Method of ladle for transferring molten metal |
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| CN107030250A (en) * | 2017-04-01 | 2017-08-11 | 东风精密铸造安徽有限公司 | A kind of process for making shell of model casting |
| CN107117950A (en) * | 2017-05-22 | 2017-09-01 | 攀钢冶金材料有限责任公司 | A kind of refractory brick and preparation method thereof |
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| CN110405134A (en) * | 2019-08-26 | 2019-11-05 | 上海大学 | A kind of high-strength composite fiber ceramics shell and preparation method thereof |
| CN110614346A (en) * | 2019-10-11 | 2019-12-27 | 柳州市顺昇机械有限公司 | Method for producing automobile mold by lost foam casting process |
| CN113649522A (en) * | 2021-06-01 | 2021-11-16 | 东风精密铸造有限公司 | Coating for low-temperature wax investment casting |
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2022
- 2022-05-18 CN CN202210542470.5A patent/CN114888272A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102875161A (en) * | 2012-08-02 | 2013-01-16 | 南车戚墅堰机车车辆工艺研究所有限公司 | Small-size molten steel casting ladle lining and preparation method thereof |
| KR101709780B1 (en) * | 2016-06-02 | 2017-02-23 | 주식회사 동국알앤에스 | Manufacturing Method of ladle for transferring molten metal |
| CN106735150A (en) * | 2016-12-06 | 2017-05-31 | 武汉威林科技股份有限公司 | A kind of tundish lining refractory material and its manufacturing process |
| CN107030250A (en) * | 2017-04-01 | 2017-08-11 | 东风精密铸造安徽有限公司 | A kind of process for making shell of model casting |
| CN107117950A (en) * | 2017-05-22 | 2017-09-01 | 攀钢冶金材料有限责任公司 | A kind of refractory brick and preparation method thereof |
| CN107442768A (en) * | 2017-08-10 | 2017-12-08 | 张家港浦项不锈钢有限公司 | The pouring technology of steel-making continuous casting tundish permanent layer |
| CN110405134A (en) * | 2019-08-26 | 2019-11-05 | 上海大学 | A kind of high-strength composite fiber ceramics shell and preparation method thereof |
| CN110614346A (en) * | 2019-10-11 | 2019-12-27 | 柳州市顺昇机械有限公司 | Method for producing automobile mold by lost foam casting process |
| CN113649522A (en) * | 2021-06-01 | 2021-11-16 | 东风精密铸造有限公司 | Coating for low-temperature wax investment casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383101A (en) * | 2022-08-15 | 2022-11-25 | 东风精密铸造有限公司 | Heat-preservation pouring ladle for investment casting |
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