CN113333667B - Composition for casting material and preparation method thereof - Google Patents
Composition for casting material and preparation method thereof Download PDFInfo
- Publication number
- CN113333667B CN113333667B CN202110635929.1A CN202110635929A CN113333667B CN 113333667 B CN113333667 B CN 113333667B CN 202110635929 A CN202110635929 A CN 202110635929A CN 113333667 B CN113333667 B CN 113333667B
- Authority
- CN
- China
- Prior art keywords
- powder
- bentonite
- mixing
- modified
- water
- Prior art date
- 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.)
- Active
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a casting materialA composition for a casting material and a method for preparing the same, the composition for a casting material comprising: modified bentonite composite powder and modified Al 2 O 3 Composite powder, LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 Powder, magnesium oxide powder, water-soluble alkyd resin, carbon-chromium-iron alloy powder and Al 2 O 3 ·2SiO 2 ·2H 2 O powder and water. Solves the problems that the existing casting coating has higher gas evolution and the casting coating and the casting body are easy to peel.
Description
Technical Field
The invention relates to the field of inorganic materials, in particular to a composition for a casting material and a preparation method thereof.
Background
The application of stainless steel castings is more and more extensive, the quality of the stainless steel castings is closely related to the coating in the casting process, the casting coating determines the quality of the surface of the stainless steel, and the existing casting coating has a plurality of defects: 1. easily forming low-melting-point compounds to cause sand sticking; 2. the adhesion of the coating is poor; 3. the coating is easy to foam and generate cracks after being burnt and dried; 3. the leveling property is poor, the coating uniformity is poor, layering occurs in a short time, and the refractory aggregate is easy to harden. For example, chinese patent No. CN201611176016.3 provides a casting coating for extra large stainless steel castings and a preparation method thereof, wherein the chemical components of the casting coating comprise the following components in parts by weight: 100 parts of aggregate, 1-5 parts of modified kaolin, 1-5 parts of carrageenan, 0.2-3 parts of polyacrylamide, 0.2-3 parts of alcohol-soluble polyester modified resin, 0.1-3 parts of low-viscosity polyvinyl butyral resin and 20-40 parts of carrier liquid. The technical scheme can effectively solve the technical problems, but the gas evolution of the casting coating is high, and the casting coating and the casting body are easy to peel.
Disclosure of Invention
The invention aims to provide a composition for a casting material and a preparation method thereof, and solves the problems that the existing casting coating has high gas evolution and the casting coating and a casting body are easy to peel.
In order to achieve the above object, the present invention provides a composition for a foundry material comprising: modified bentonite composite powder and modified Al 2 O 3 Composite powder, LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 Powder, magnesium oxide powder, water-soluble alkyd resin, carbon-chromium-iron alloy powder and Al 2 O 3 ·2SiO 2 ·2H 2 O powder and water.
In a preferred embodiment of the present invention, the composition for a casting material comprises the following weight percentageThe raw materials are as follows: 22-27% of modified bentonite composite powder and modified Al 2 O 3 10-15% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 19-23% of powder, 1.2-1.8% of magnesium oxide powder, 4-8% of water-soluble alkyd resin, 0.6-1.1% of carbon-chromium-iron alloy powder, 18-21% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 And (4) O powder.
In a preferred embodiment of the present invention, a method for preparing a modified bentonite composite powder comprises: mixing Al (ClO) 3 ) 3 Mixing bentonite, sodium carbonate and water under heating to obtain the modified bentonite composite powder.
In a preferred embodiment of the invention, Al (ClO) is first introduced 3 ) 3 Mixing with bentonite at a weight ratio of 5.6:100, adding water at a solid-to-liquid ratio of 4:6-9, and adding Al (ClO) 3 ) 3 And sodium carbonate accounting for 1.2 to 1.5 percent of the weight of the bentonite mixture.
In a preferred embodiment of the present invention, Al (ClO) is added 3 ) 3 Mixing bentonite, sodium carbonate and water, stirring for 25-30min, keeping the temperature at 85-95 ℃ for 13-15h, filtering and drying to obtain the modified bentonite composite powder.
In a preferred embodiment of the present invention, the drying conditions include: the temperature is 85-100 ℃ and the time is 1.5-2 h.
In a preferred embodiment of the present invention, modified Al 2 O 3 The preparation method of the composite powder comprises the following steps:
1) ZnSO is added 4 Mixing the aqueous solution with NaOH, and calcining to obtain ZnO powder;
2) mixing ethanol, water, CTAB, phosphotungstic acid and bentonite, and drying to obtain bentonite (CTAB) 3 PW 12 O4 powder;
3) mixing Al 2 O 3 Aqueous solution, NaOH, ZnO powder and bentonite-Containing (CTAB) 3 PW 12 Mixing O4 powder, drying and heating to obtain modified Al 2 O 3 Composite powder。
In a preferred embodiment of the present invention, in step (3), Al is added 2 O 3 Aqueous solution, NaOH, ZnO powder and bentonite-Containing (CTAB) 3 PW 12 Mixing O4 powder, drying for 0.5-1h, and heating to 210 ℃ and 250 ℃ to obtain modified Al 2 O 3 And (3) compounding powder.
In a preferred embodiment of the present invention, in step (1), the calcination conditions include a temperature of 400 ℃ and a temperature of 500 ℃ for a time of 2-4 h.
The invention also provides a preparation method of the composition for the casting material, which comprises the steps of mixing the modified bentonite composite powder and the modified Al 2 O 3 Composite powder, LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 Powder, magnesium oxide powder, water-soluble alkyd resin, carbon-chromium-iron alloy powder and Al 2 O 3 ·2SiO 2 ·2H 2 And mixing the O powder and water to obtain the composition for the casting material.
Compared with the prior art, the technical scheme of the invention has the following advantages: the gas evolution of the magnesium oxide powder and the carbon-chromium-iron alloy powder in the material is low, and the stripping property with a casting body is improved. The material is medium carbon ferrochrome powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 The powder has good heat insulation and heat resistance in the material, good high-temperature stability and low gas evolution. Al (ClO) 3 ) 3 Modified bentonite composite material powder, ZnO and bentonite-Containing (CTAB) 3 PW 12 O 40 Modified Al 2 O 3 Composite powder and Al 2 O 3 ·2SiO 2 ·2H 2 The O powder has higher body strength, and the high-temperature and low-temperature strength of the material is obviously improved. Suspending agent is Al (ClO) 3 ) 3 Modified bentonite composite material as main material, LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 As an auxiliary, the gas evolution is low; the binder is ZnO and bentonite-Containing (CTAB) 3 PW 12 O 40 Modified Al 2 O 3 The composite powder is mainly prepared by mixingA water-soluble alkyd resin; the addition of the magnesium oxide powder and the carbon-chromium-iron alloy powder is not easy to agglomerate and has good dispersibility. The obtained composition for the casting material has small gas evolution so as to improve the stripping property with the casting body.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes the embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
22 percent of modified bentonite composite powder and modified Al 2 O 3 10% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 19% of powder, 1.2% of magnesium oxide powder, 4% of water-soluble alkyd resin, 0.6% of carbon-chromium-iron alloy powder (FeCr67C6.0), 18% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 Mixing the O powder to obtain a composition for the casting material; the preparation method of the modified bentonite composite powder comprises the following steps: by Al (ClO) 3 ) 3 And the bentonite is 5.6:100, grinding bentonite to 100 meshes, mixing with Al (ClO) 3 ) 3 Mixing, and then mixing according to the solid-liquid weight ratio of 4: 7 adding water, stirring, adding Al (ClO) 3 ) 3 Sodium carbonate accounting for 1.3 percent of the weight of the bentonite mixture, stirring for 28min, preserving heat at 90 ℃ for 14h, filtering and drying (90 ℃ and 1.8h) to obtain Al (ClO) 3 ) 3 Modified bentonite composite material. The composite material was ground to 300 mesh. Modified Al 2 O 3 The preparation method of the composite powder comprises the following steps: taking zinc salt ZnSO 4 Is prepared to contain ZnSO 4 At 55g/L in water, ZnSO was then added 4 NaOH 2 times in molar amount was stirred for 0.8h, and then the precipitate was washed 2 times with distilled water and absolute ethanol, respectively. Putting the powder into a drying oven to dry for 0.8h, and then calcining the powder for 3h at 450 ℃ to obtain ZnO powder. CTAB of 0.5mol is added into 1000ml ethanol and 1000ml water,stirring for 15min, adding 0.5mol CTAB, stirring for 15min, adding 0.165mol phosphotungstic acid, reacting for 4 min under stirring, adding bentonite powder, stirring for 1h, standing at 50 deg.C for 30min, washing with ethanol, vacuum filtering, and oven drying at 50 deg.C to obtain bentonite-Containing (CTAB) 3 PW 12 O 40 And (3) powder. The bentonite is added in an amount of (CTAB) 3 PW 12 O 40 6% by weight. Taking Al 2 (SO 4 ) 3 Is prepared to contain Al 2 O 3 108g/L of an aqueous solution, and then Al was added 2 (SO 4 ) 3 NaOH 6 times the molar amount, stirring the solution for 4 minutes, adding ZnO powder and bentonite-Containing (CTAB) 3 PW 12 O 40 Powders, ZnO and bentonite-Containing (CTAB) 3 PW 12 O 40 The addition amount of the powder is Al 2 O 3 6% by weight. ZnO and bentonite-Containing (CTAB) 3 PW 12 O 40 The weight ratio of the powder is 1: 1.2. the solution was then stirred for a further 0.8h, and the precipitate was then washed 2 times with distilled water and absolute ethanol, respectively. Drying in a drying oven for 0.8h, heating to 230 deg.C to obtain ZnO and bentonite-Containing (CTAB) 3 PW 12 O 40 Modified Al 2 O 3 And (3) composite powder.
Example 2
The procedure was carried out as in example 1, except that 25% of modified bentonite composite powder and 25% of modified Al were mixed 2 O 3 13% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 21% of powder, 1.5% of magnesium oxide powder, 6% of water-soluble alkyd resin, 0.9% of carbon-chromium-iron alloy powder (FeCr67C6.0), 20% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 And mixing the O powder to obtain the composition for the casting material.
Example 3
The procedure was carried out as in example 1, except that 27% of modified bentonite composite powder and modified Al were mixed 2 O 3 15% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 23% of powder, 1.8% of magnesium oxide powder, 8% of water-soluble alkyd resin, 1.1% of carbon-chromium-iron alloy powder (FeCr67C6.0), 21% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 And mixing the O powder to obtain the composition for the casting material.
Comparative example 1
The procedure was carried out as in example 1, except that 21% of modified bentonite composite powder and 21% of modified Al were mixed 2 O 3 9% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 18% of powder, 1% of magnesium oxide powder, 3% of water-soluble alkyd resin, 0.5% of carbon-chromium-iron alloy powder (FeCr67C6.0), 16% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 And mixing the O powder to obtain the composition for the casting material.
Comparative example 2
The procedure was carried out as in example 1, except that 27.5% of modified bentonite composite powder and 27.5% of modified Al were mixed 2 O 3 15.5% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 23.5 percent of powder, 2 percent of magnesia powder, 8.5 percent of water-soluble alkyd resin, 1.2 percent of carbon-chromium-iron alloy powder (FeCr67C6.0), 21.5 percent of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 And mixing the O powder to obtain the composition for the casting material.
Comparative example 3
The patent number is CN 201611176016.3.
Test example
Examples 1-3 and comparative examples 1-3 were tested according to the method specified in JB/T9226 Sand casting coatings and the results were as follows:
| numbering | Gas evolution volume mL/g |
| Example 1 | 6.4 |
| Example 2 | 6.1 |
| Example 3 | 6.3 |
| Comparative example 1 | 6.6 |
| Comparative example 2 | 6.7 |
| Comparative example 3 | 7-10 |
As is clear from the above measurement structure, the composition for a casting material provided by the present invention has a small gas evolution, and within the scope of the present invention, the gas evolution is 6.1 to 6.4mL/g, and is lower than the gas evolution of the prior art.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (2)
1. A composition for a foundry material, comprising: modified bentonite composite powder and modified Al 2 O 3 Composite powder, LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 Powder, magnesium oxide powder, water-soluble alkyd resin, carbon-chromium-iron alloy powder and Al 2 O 3 ·2SiO 2 ·2H 2 O powder and water; the composition for the casting material comprises the following raw materials in percentage by weight: 22-27% of modified bentonite composite powder and modified Al 2 O 3 10-15% of composite powder and LiAl (SiO) 3 ) 2 /Li 2 O·Al 2 O 3 ·4SiO 2 19-23% of powder, 1.2-1.8% of magnesium oxide powder, 4-8% of water-soluble alkyd resin, 0.6-1.1% of carbon-chromium-iron alloy powder, 18-21% of water and the balance of Al 2 O 3 ·2SiO 2 ·2H 2 O powder; the preparation method of the modified bentonite composite powder comprises the following steps: mixing Al (ClO) 3 ) 3 Mixing bentonite, sodium carbonate and water under the heating condition to obtain modified bentonite composite powder; al (ClO) is firstly added 3 ) 3 Mixing with bentonite at a weight ratio of 5.6:100, adding water at a solid-to-liquid ratio of 4:6-9, and adding Al (ClO) 3 ) 3 And sodium carbonate in an amount of 1.2 to 1.5% by weight of the bentonite mixture; mixing Al (ClO) 3 ) 3 Mixing bentonite, sodium carbonate and water, stirring for 25-30min, keeping the temperature at 85-95 ℃ for 13-15h, filtering and drying to obtain modified bentonite composite powder; the drying conditions include: the temperature is 85-100 ℃, and the time is 1.5-2 h; modified Al 2 O 3 The preparation method of the composite powder comprises the following steps:
1) ZnSO is added 4 Mixing the aqueous solution with NaOH, and calcining to obtain ZnO powder;
2) mixing ethanol, water, CTAB, phosphotungstic acid and bentonite, and drying to obtain bentonite (CTAB) 3 PW 12 O4 powder;
3) mixing Al 2 O 3 Aqueous solution, NaOH, ZnO powder and bentonite-Containing (CTAB) 3 PW 12 Mixing O4 powder, drying and heating to obtain modified Al 2 O 3 Compounding powder; in the step (3), Al is added 2 O 3 Aqueous solution, NaOH, ZnO powder and bentonite-Containing (CTAB) 3 PW 12 Mixing O4 powder, drying for 0.5-1h, and heating to 210 ℃ and 250 ℃ to obtain modified Al 2 O 3 And (3) compounding powder.
2. The composition for a foundry material as set forth in claim 1, wherein, in the step (1), the calcination is carried out under conditions comprising a temperature of 400 ℃ and 500 ℃ for a period of 2 to 4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635929.1A CN113333667B (en) | 2021-06-08 | 2021-06-08 | Composition for casting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635929.1A CN113333667B (en) | 2021-06-08 | 2021-06-08 | Composition for casting material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113333667A CN113333667A (en) | 2021-09-03 |
| CN113333667B true CN113333667B (en) | 2022-08-23 |
Family
ID=77475204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110635929.1A Active CN113333667B (en) | 2021-06-08 | 2021-06-08 | Composition for casting material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113333667B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB857377A (en) * | 1958-10-27 | 1960-12-29 | Mond Nickel Co Ltd | Improvements relating to casting moulds and to the production of ingots in them |
| JPH05237630A (en) * | 1992-03-02 | 1993-09-17 | Honda Motor Co Ltd | Coating material for ceramic member for internal chill casting |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
| CN102407275A (en) * | 2011-04-25 | 2012-04-11 | 湖北工业大学 | Expendable pattern casting (EPC) molding shell paint for casting steel and preparation method thereof |
| CN102836952A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Resin sand type casting coating and preparation method thereof |
| CN105195670A (en) * | 2015-10-09 | 2015-12-30 | 宁夏共享化工有限公司 | Production method of water-based flow coating paint capable of preventing veining defects |
| CN106623761A (en) * | 2016-12-19 | 2017-05-10 | 二重集团（德阳）重型装备股份有限公司 | Casting coating for oversize stainless steel castings and preparation method of casting coating |
| CN107470551A (en) * | 2017-08-26 | 2017-12-15 | 上海魁殊自动化科技有限公司 | A kind of mold wash and its compound method |
| CN111570720A (en) * | 2020-05-26 | 2020-08-25 | 襄阳聚力新材料科技有限公司 | Water-based flow coating for cast steel and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056289B (en) * | 2013-01-25 | 2014-12-10 | 马鞍山市华达冶金机械有限公司 | Casting paint for high-chromium cast iron and preparation method thereof |
-
2021
- 2021-06-08 CN CN202110635929.1A patent/CN113333667B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB857377A (en) * | 1958-10-27 | 1960-12-29 | Mond Nickel Co Ltd | Improvements relating to casting moulds and to the production of ingots in them |
| JPH05237630A (en) * | 1992-03-02 | 1993-09-17 | Honda Motor Co Ltd | Coating material for ceramic member for internal chill casting |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
| CN102407275A (en) * | 2011-04-25 | 2012-04-11 | 湖北工业大学 | Expendable pattern casting (EPC) molding shell paint for casting steel and preparation method thereof |
| CN102836952A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Resin sand type casting coating and preparation method thereof |
| CN105195670A (en) * | 2015-10-09 | 2015-12-30 | 宁夏共享化工有限公司 | Production method of water-based flow coating paint capable of preventing veining defects |
| CN106623761A (en) * | 2016-12-19 | 2017-05-10 | 二重集团（德阳）重型装备股份有限公司 | Casting coating for oversize stainless steel castings and preparation method of casting coating |
| CN107470551A (en) * | 2017-08-26 | 2017-12-15 | 上海魁殊自动化科技有限公司 | A kind of mold wash and its compound method |
| CN111570720A (en) * | 2020-05-26 | 2020-08-25 | 襄阳聚力新材料科技有限公司 | Water-based flow coating for cast steel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113333667A (en) | 2021-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113059115B (en) | Refractory coating for sand-resistant lost foam casting and preparation method thereof | |
| CN108299001B (en) | Silicon-based ceramic core forming method | |
| CN108183192A (en) | A kind of ceramic slurry and lithium ion battery separator | |
| CN110744031B (en) | Metal ceramic wear-resistant material of three-dimensional network ceramic framework and preparation method thereof | |
| CN107057412B (en) | A kind of self-curing electrolgtic aluminium carbon anode high temperature anti-oxidation coating | |
| CN102921885A (en) | Sand casting technology for titanium, zirconium and nickel and alloy casting thereof | |
| CN113333667B (en) | Composition for casting material and preparation method thereof | |
| CN106365654B (en) | A kind of anti-lithium electric material erosion fire-clay crucible adding ZrN-SiAlON | |
| CN102303978A (en) | Method for preparing porous silicon carbide ceramic with high strength | |
| CN105983650A (en) | Nano hydroxyl magnesium silicate containing high-lubricity low-carbon-residue water-based paint for lost foam casting and preparation method thereof | |
| CN110090917B (en) | Preparation method of cast-infiltration coating and preparation method of cast-infiltration coating | |
| CN108213325B (en) | Casting coating taking calcium bentonite as suspending agent and preparation method thereof | |
| CN113372035B (en) | Anti-segregation agent for concrete and preparation method thereof | |
| WO2019119610A1 (en) | Preparation process for ceramic heating body having mosaic structure | |
| CN114899392A (en) | Preparation method of lithium iron phosphate or lithium ferromanganese anode material of lithium ion battery | |
| CN115196982A (en) | Boiler lining heat-insulating material and preparation method thereof | |
| CN113198971B (en) | Suspending agent, application thereof and coating | |
| CN114171740A (en) | Preparation method of nano lithium iron phosphate cathode material and lithium ion battery | |
| CN109180207B (en) | Refractory material for foundry ladle and preparation method thereof | |
| CN113333666B (en) | Wear-resistant casting coating composition and preparation method thereof | |
| CN108786929B (en) | Preparation method of cordierite catalyst carrier for diesel vehicle | |
| CN116639998B (en) | Porous silicon carbide ceramic material and preparation method thereof | |
| CN108947501A (en) | A kind of preparation method of long-life pocket block | |
| CN101391282B (en) | Magnesium alloy metal-mold low-pressure casting lift-tube coatings and preparation method thereof | |
| CN112570644B (en) | Coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20210903 Assignee: Wuhu JUFA New Material Co.,Ltd. Assignor: ANHUI INSTITUTE OF INFORMATION TECHNOLOGY Contract record no.: X2022980017548 Denomination of invention: Composition for casting materials and its preparation method Granted publication date: 20220823 License type: Common License Record date: 20221010 |
|
| EE01 | Entry into force of recordation of patent licensing contract |