CN116352011A - V-method cast steel composite coating and preparation method thereof - Google Patents
V-method cast steel composite coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 101
- 239000011248 coating agent Substances 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 49
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 65
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000000375 suspending agent Substances 0.000 claims abstract description 40
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 33
- 239000011230 binding agent Substances 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 34
- 229940125904 compound 1 Drugs 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 16
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 15
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 15
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 15
- 239000010453 quartz Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 15
- 229910052845 zircon Inorganic materials 0.000 claims description 15
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 13
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 13
- 239000000440 bentonite Substances 0.000 claims description 13
- 229910000278 bentonite Inorganic materials 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229940125782 compound 2 Drugs 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 9
- -1 dodecyl dimethyl tertiary amine Chemical class 0.000 claims description 8
- AHWALFGBDFAJAI-UHFFFAOYSA-N phenyl carbonochloridate Chemical compound ClC(=O)OC1=CC=CC=C1 AHWALFGBDFAJAI-UHFFFAOYSA-N 0.000 claims description 8
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical group O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 7
- WXDOQCCGPRJVFE-UHFFFAOYSA-N 4-(dichloromethyl)aniline Chemical compound NC1=CC=C(C(Cl)Cl)C=C1 WXDOQCCGPRJVFE-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- AICOOMRHRUFYCM-ZRRPKQBOSA-N oxazine, 1 Chemical compound C([C@@H]1[C@H](C(C[C@]2(C)[C@@H]([C@H](C)N(C)C)[C@H](O)C[C@]21C)=O)CC1=CC2)C[C@H]1[C@@]1(C)[C@H]2N=C(C(C)C)OC1 AICOOMRHRUFYCM-ZRRPKQBOSA-N 0.000 claims description 2
- XVMSFILGAMDHEY-UHFFFAOYSA-N 6-(4-aminophenyl)sulfonylpyridin-3-amine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=N1 XVMSFILGAMDHEY-UHFFFAOYSA-N 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 18
- 239000000725 suspension Substances 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 10
- 239000004576 sand Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 description 3
- 125000003368 amide group Chemical group 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 125000001453 quaternary ammonium group Chemical group 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004323 potassium nitrate Substances 0.000 description 2
- 235000010333 potassium nitrate Nutrition 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 244000035744 Hura crepitans Species 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- YMUYTQCKKRCJMP-UHFFFAOYSA-N aluminum;calcium;oxygen(2-) Chemical compound [O-2].[Al+3].[Ca+2] YMUYTQCKKRCJMP-UHFFFAOYSA-N 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
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)
Abstract
The invention relates to the technical field of casting coatings, in particular to a V-method cast steel composite coating and a preparation method thereof. The composite coating comprises the following components in parts by weight: 90-100 parts of refractory powder; 1.0-2.5 parts of suspending agent; 1.0-3.0 parts of adhesive; 0.2-0.4 part of auxiliary agent; 50-65 parts of alcohol-based solution; the preparation method comprises the following steps: respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby; sequentially adding the suspending agent and the binder into the alcohol-based solution, stirring at a high speed for 10-15min, then adding the refractory powder, continuously stirring for 15-20min, finally adding the auxiliary agent, and stirring at a low speed for 5-10min to obtain the composite coating. The V-method cast steel composite coating prepared by the invention has good suspension property, high drying speed, good coating property and uniform coating thickness; the gas generation amount is small, and casting pores can be reduced; the wear resistance is good, and the high-temperature crack resistance is good; the composite coating has excellent comprehensive performance, has wide application value and can meet market demands.
Description
Technical Field
The invention relates to the technical field of casting coatings, in particular to a V-method cast steel composite coating and a preparation method thereof.
Background
The V-process casting is a physical forming process, which adopts dry sand moulding without binder and water, the plastic film is sealed on the sand box, negative pressure is generated by means of the pumping of a vacuum pump, so that the sand is tightly formed by the internal and external pressure difference of the sand mould, and the casting is obtained after the casting is solidified, the negative pressure is relieved, and the sand is collapsed. However, the plastic film may be burnt during the production process, so that sand inclusion is generated when the molding sand falls off, and sand sticking is generated when the molten metal permeates into the casting mold under the action of vacuum suction, so that special paint needs to be applied to the surface of the plastic film on one side of the molding sand, thereby preventing sand inclusion and sand sticking.
The patent with application number 201610047922.7 discloses a special coating for producing micro-carbon high alloy steel castings by a V-method casting process, which consists of a composite refractory aggregate consisting of white silicon carbide and aluminum-calcium oxide, a decarburizing agent consisting of potassium nitrate and montmorillonite, a composite suspending agent consisting of attapulgite and sepiolite, a binder consisting of phenolic resin and butyraldehyde and an organic and inorganic auxiliary agent; oxygen is gradually released at high temperature through the oxidizer corrosion inhibitor potassium nitrate and montmorillonite, so that organic matters contained in the film and the coating are carbonized and oxidized into carbon dioxide gas and water vapor when molten steel is poured, and the carbon dioxide gas and the water vapor are vacuumized, although the process of forming the ultralow-carbon high-alloy steel casting is realized; however, the released oxygen is oxidized with high-temperature liquid metal, paint and casting mould at high temperature, so that extremely strong adhesive compound is generated on the surface of the casting, and the casting mould is not easy to peel off. The patent with application number 201911066971.5 discloses a V-method cast steel composite coating and a spraying device thereof, wherein the composite coating comprises 98-105 parts of refractory powder, 1.5-3.0 parts of suspending agent, 55-70 parts of carrier liquid, 1.5-3.5 parts of binder and 0.1-0.5 part of auxiliary agent; compared with the traditional coating, the composite coating has higher refractoriness, can form a stripping layer during sintering, is easy to collapse during casting cleaning, has good coating property, thixotropy and leveling property, but the wear resistance and adhesion of different coatings provided are unstable, have a larger gap, have poorer suspension property for 24 hours, are easy to generate precipitation and hardening in the long-term storage and transportation processes, and reduce the using effect of the coating.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the V-method cast steel composite coating and the preparation method thereof, and the prepared composite coating has good suspension property, high drying speed, good coating property and uniform coating thickness; the gas generation amount is small, and casting pores can be reduced; the wear resistance is good, and the high-temperature cracking resistance is good.
The technical scheme adopted by the invention for achieving the purpose is as follows:
a V-method cast steel composite coating comprises the following components in parts by weight: 90-100 parts of refractory powder; 1.0-2.5 parts of suspending agent; 1.0-3.0 parts of adhesive; 0.2-0.4 part of auxiliary agent; 50-65 parts of alcohol-based solution; the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder; the binder consists of polyvinyl butyral and rosin; the auxiliary agent is ferric oxide; the alcohol-based solution is 90-95% ethanol solution. The mass ratio of the zircon powder to the quartz powder is 1:2-3; the mass ratio of the polyvinyl butyral to the rosin is 1:4-6.
Further, the preparation method of the organic modified bentonite comprises the following steps: adding bentonite into distilled water, heating to 70-80 ℃, stirring for 1.5-2h, then adding a compound 1, continuing stirring for 2-4h, naturally cooling to room temperature after the reaction is completed, standing for 20-24h, filtering, placing filter residues at 60-70 ℃, and drying for 4-6h to obtain the organic modified bentonite; the mass ratio of the bentonite to the compound 1 to the distilled water is 1:0.5-0.8:25-30.
Further, the chemical structural formula of the compound 1 is:
further, the preparation method of the compound 1 comprises the following steps:
s1, sequentially adding p-aminochlorobenzyl chloride and pyridine into an N, N-dimethylformamide solution, cooling to-25-20 ℃, slowly dropwise adding phenyl chloroformate, and continuously stirring for reaction for 2-4 hours after dropwise adding to obtain a compound 2 with a chemical structural formula:
s2, sequentially adding the compound 2 and the dodecyl dimethyl tertiary amine into an ethanol solution, and carrying out reflux reaction for 9-12h at 80-85 ℃ to obtain the compound 1.
Further, in the step S1, the molar ratio of the p-aminochlorobenzyl chloride, phenyl chloroformate and pyridine is 1:1.2-1.4:2.0-2.5; the molar ratio of the compound 2 to the dodecyl dimethyl tertiary amine in the step S2 is 1:1.1-1.2.
The invention also provides a preparation method of the V-method cast steel composite coating, which comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 10-15min, then adding refractory powder, continuously stirring for 15-20min, finally adding an auxiliary agent, and stirring at a low speed for 5-10min to obtain a composite coating; the high speed is 800-1000r/min; the low speed is 200-300r/min.
The application method of the V-method cast steel composite coating provided by the invention comprises the following steps: spraying the composite paint onto EVA organic film with thickness of 0.3-0.7mm, and air drying at 55-70deg.C for 10-15min.
The invention has the following beneficial effects:
according to the invention, by utilizing the characteristic that bentonite can undergo cation exchange, a compound 1 containing quaternary ammonium groups, long-chain hydrophobic alkane, amide groups and rigid benzene ring groups in molecules is introduced into bentonite to obtain organic modified bentonite, and the organic modified bentonite is used as a suspending agent, wherein the quaternary ammonium groups and the long-chain hydrophobic alkane can enable components of the coating to be dispersed in an alcohol-based solution for a long time, the functions of the components of the composite coating are fully exerted when the composite coating is used, and the polar amide groups can increase the binding force between the composite coating and an organic film, so that the composite coating has good adhesiveness, a denser three-dimensional grid is formed by combining with a binder, refractory powder is better attached in the three-dimensional grid, the binding force and the acting area between the refractory powder are increased, and the wear resistance of the composite coating is effectively improved; the rigid benzene ring structure can also improve the strength of the composite coating, so that the wear resistance of the composite coating is enhanced, and the composite coating is free from cracking and foaming at normal temperature and high temperature. The quartz powder and the zircon powder are used as refractory powder of casting paint, have higher wear resistance, can effectively prevent the damage of the coating, and have excellent adhesion performance; the alcohol-based composite coating can be dried quickly.
The V-method cast steel composite coating prepared by the invention has good suspension property, high drying speed, good coating property and uniform coating thickness; the gas generation amount is small, and casting pores can be reduced; the wear resistance is good, and the high-temperature crack resistance is good; the composite coating has excellent comprehensive performance, has wide application value and can meet market demands.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely in connection with the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Polyvinyl butyral CAS number 63148-65-2; rosin CAS No. 8050-09-7; iron oxide CAS number 1332-37-2; bentonite CAS number 1302-78-9; p-aminochlorobenzyl CAS number 65581-19-3; pyridine CAS number 110-86-1; phenyl chloroformate CAS number 1885-14-9; dodecyl dimethyl tertiary amine CAS number 112-18-5; n, N-dimethylformamide CAS number 68-12-2; ethanol CAS number 64-17-5; ethyl acetate CAS No. 141-78-6; all chemical reagents are commercially available.
Example 1
The embodiment provides a V-method cast steel composite coating and a preparation method thereof.
A V-method cast steel composite coating consists of the following components in parts by weight: 100 parts of refractory powder; 2.5 parts of suspending agent; 3.0 parts of binder; 0.4 parts of auxiliary agent; 65 parts of alcohol-based solution; wherein the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder, wherein the mass ratio of the zircon powder to the quartz powder is 1:3; the adhesive consists of polyvinyl butyral and rosin, wherein the mass ratio of the polyvinyl butyral to the rosin is 1:6; the auxiliary agent is ferric oxide; the alcohol-based solution is a 95% ethanol solution.
A preparation method of V-method cast steel composite coating comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 10min, then adding refractory powder, continuously stirring for 15min, finally adding an auxiliary agent, and stirring at a low speed for 5min to obtain a composite coating; wherein the high speed is 1000r/min; the low speed was 300r/min.
The preparation method of the organic modified bentonite comprises the following steps: adding bentonite into distilled water, heating to 70 ℃, stirring for 2 hours, then adding a compound 1, continuing stirring for reaction for 3 hours, naturally cooling to room temperature after the reaction is completed, standing for 24 hours, filtering, placing filter residues at 70 ℃, and drying for 6 hours to obtain organic modified bentonite; wherein the mass ratio of bentonite to compound 1 to distilled water is 1:0.8:30.
The preparation method of the compound 1 comprises the following steps:
s1, sequentially adding 15.0g of p-aminochlorobenzyl chloride and 20.9g of pyridine into 500mL of N, N-dimethylformamide solution, cooling to-20 ℃, slowly dropwise adding 16.6g of phenyl chloroformate, continuously stirring for reaction for 4 hours, naturally heating to room temperature after the reaction is finished, adding 500mL of water and 1000mL of ethyl acetate for extraction, carrying out water phase back extraction once, collecting an organic phase, drying, and concentrating under reduced pressure to obtain 25.4g of compound 2, wherein the molar ratio of p-aminochlorobenzyl chloride to phenyl chloroformate to pyridine is 1:1.4:2.5; the reaction process is as follows:
compound 2: ESI (m/z): 262.7[ M+H ]] + ， 1 H-NMR(600MHz，DMSO-d 6 ，δppm)：9.86(s，1H)，7.56(d，2H)，7.49-7.50(m，2H)，7.34-7.36(m，3H)，7.23-7.25(m，2H)，4.52(s，2H)。
S2, sequentially adding 25.4g of compound 2 and 24.4g of dodecyl dimethyl tertiary amine into 450mL of ethanol solution, carrying out reflux reaction for 10h at 80 ℃, naturally cooling to room temperature after the reaction is finished, concentrating the reaction solution to remove most ethanol, adding 450mL of water and 500mL of ethyl acetate into the reaction solution for extraction, carrying out organic reverse extraction once, combining aqueous phases, drying, and concentrating under reduced pressure to obtain 36.5g of compound 1, wherein the molar ratio of the compound 2 to the dodecyl dimethyl tertiary amine is 1:1.2; the reaction process is as follows:
compound 1: ESI (m/z): 439.6[ M-Cl] + ， 1 H-NMR(600MHz，DMSO-d 6 ，δppm)：9.87(s，1H)，7.48-7.49(m，4H)，7.30-7.31(m，1H)，7.24-7.26(m，4H)，4.38(s，2H)，3.20-3.22(m，2H)，2.90(s，6H)，1.71-1.72(m，2H)，1.26-1.29(m，18H)，0.88-0.89(m，3H)。
Example 2
The embodiment provides a V-method cast steel composite coating and a preparation method thereof.
A V-method cast steel composite coating consists of the following components in parts by weight: 100 parts of refractory powder; 2.5 parts of suspending agent; 3.0 parts of binder; 0.4 parts of auxiliary agent; 65 parts of alcohol-based solution; wherein the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder, wherein the mass ratio of the zircon powder to the quartz powder is 1:2; the adhesive consists of polyvinyl butyral and rosin, wherein the mass ratio of the polyvinyl butyral to the rosin is 1:4; the auxiliary agent is ferric oxide; the alcohol-based solution is a 90% ethanol solution.
A preparation method of V-method cast steel composite coating comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 15min, then adding refractory powder, continuously stirring for 20min, finally adding an auxiliary agent, and stirring at a low speed for 10min to obtain a composite coating; wherein the high speed is 800r/min; the low speed is 200r/min.
Wherein the preparation method of the organic modified bentonite is the same as in example 1.
Example 3
The embodiment provides a V-method cast steel composite coating and a preparation method thereof.
A V-method cast steel composite coating consists of the following components in parts by weight: 95 parts of refractory powder; 2.0 parts of suspending agent; 2.0 parts of binder; 0.3 parts of auxiliary agent; 60 parts of alcohol-based solution; wherein the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder, wherein the mass ratio of the zircon powder to the quartz powder is 1:3; the adhesive consists of polyvinyl butyral and rosin, wherein the mass ratio of the polyvinyl butyral to the rosin is 1:6; the auxiliary agent is ferric oxide; the alcohol-based solution is a 95% ethanol solution.
A preparation method of V-method cast steel composite coating comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 13min, then adding refractory powder, continuously stirring for 18min, finally adding an auxiliary agent, and stirring at a low speed for 8min to obtain a composite coating; wherein the high speed is 900r/min; the low speed is 250r/min.
Wherein the preparation method of the organic modified bentonite is the same as in example 1.
Example 4
The embodiment provides a V-method cast steel composite coating and a preparation method thereof.
A V-method cast steel composite coating consists of the following components in parts by weight: 90 parts of refractory powder; 1.0 part of suspending agent; 1.0 parts of a binder; 0.2 parts of auxiliary agent; 55 parts of alcohol-based solution; wherein the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder, wherein the mass ratio of the zircon powder to the quartz powder is 1:2.5; the adhesive consists of polyvinyl butyral and rosin, wherein the mass ratio of the polyvinyl butyral to the rosin is 1:5; the auxiliary agent is ferric oxide; the alcohol-based solution is a 90% ethanol solution.
A preparation method of V-method cast steel composite coating comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 10min, then adding refractory powder, continuously stirring for 15min, finally adding an auxiliary agent, and stirring at a low speed for 5min to obtain a composite coating; wherein the high speed is 1000r/min; the low speed was 300r/min.
Wherein the preparation method of the organic modified bentonite is the same as in example 1.
Example 5
The embodiment provides a V-method cast steel composite coating and a preparation method thereof.
A V-method cast steel composite coating consists of the following components in parts by weight: 95 parts of refractory powder; 2.5 parts of suspending agent; 2.5 parts of binder; 0.2 parts of auxiliary agent; 65 parts of alcohol-based solution; wherein the suspending agent is organic modified bentonite; the refractory powder consists of zircon powder and quartz powder, wherein the mass ratio of the zircon powder to the quartz powder is 1:3; the adhesive consists of polyvinyl butyral and rosin, wherein the mass ratio of the polyvinyl butyral to the rosin is 1:5; the auxiliary agent is ferric oxide; the alcohol-based solution is a 90% ethanol solution.
A preparation method of V-method cast steel composite coating comprises the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding a suspending agent and a binder into an alcohol-based solution, stirring at a high speed for 14min, then adding refractory powder, continuously stirring for 16min, finally adding an auxiliary agent, and stirring at a low speed for 6min to obtain a composite coating; wherein the high speed is 1000r/min; the low speed is 200r/min.
Wherein the preparation method of the organic modified bentonite is the same as in example 1.
Comparative example 1
The comparative example provides a V-method cast steel composite coating and a preparation method thereof, and compared with the example 1, the V-method cast steel composite coating has different components, wherein the suspending agent is bentonite, and the rest is the same as the example 1.
The preparation method of the V-method cast steel composite coating is the same as in example 1.
Comparative example 2
Comparative example provides a V-method cast steel composite coating and a preparation method thereof, and the V-method cast steel composite coating has different components compared with the example 1, wherein a suspending agent is a compound 1, and the rest is the same as the example 1.
A preparation method of V-method cast steel composite coating and a preparation method of a compound 1 are the same as in example 1.
Comparative example 3
The comparative example provides a common commercial cast steel liquid coating (purchased from the new dense urban Zhengyang foundry).
Spraying the composite coatings of examples 1-5 and comparative examples 1-3 on EVA organic films, drying by blowing at 60 ℃, recording drying time, and testing the thickness of the coating; meanwhile, performance detection is carried out on the composite coating, and a cross-cut method is adopted for the adhesiveness of the coating according to JISK 5400-1990; other performance tests refer to the JBT 9226-2008 standard; the results are shown in the following table:
as is clear from the above table, the composite coatings prepared in examples 1 to 5 are far superior in combination properties to those of comparative examples 1 to 3, and the composite coatings prepared in examples 1 to 5 have a density of 1.49 to 1.53g/cm 3 The viscosity is 8.5-9.5s, the drying speed is high when the product is used, and the air drying time is 10-15min at 60 ℃; the thickness of the coating is 0.4-0.7mm, the thickness is uniform, and the coating has good coating property; the 24-hour suspension property is 98-99%, and the suspension property is good; the gas generation amount is small (9-11 mL/g), and the air holes of castings can be reduced; the wear resistance and the adhesiveness are good; the coating has high strength, high temperature resistance and good crack resistance, and does not crack or foam at high temperature and high temperature.
Compared with the comparative example 1 (the suspending agent is bentonite), the comparative example 2 (the suspending agent is the compound 1) and the comparative example 3 (the common commercial cast steel liquid coating), the suspending agent used in the example 1 is the organic modified bentonite, and the bentonite has certain dispersion suspension property, and the quaternary ammonium groups and the long-chain hydrophobic alkane contained in the molecules of the bentonite further improve the dispersion property, so that each component of the composite coating can be dispersed in an alcohol-based solution for a long time, the suspension property of the composite coating is kept at 98-99% for 24 hours, no delamination or less delamination is ensured before the composite coating is used, and the functions of each component of the composite coating are fully exerted; the polar amide groups contained in the molecules can interact with the organic film through intermolecular hydrogen bonds or dipole moments, so that the binding force between the composite coating and the organic film is increased, and the adhesiveness of the composite coating is improved; the rigid benzene ring group contained in the molecule can improve the strength of the composite coating, so that the wear resistance of the composite coating is enhanced, and the composite coating is not cracked or foamed at normal temperature and high temperature; according to the invention, the organic modified bentonite is added into the examples 1-5 to be used as a suspending agent, so that the composite coating with excellent comprehensive performance can be prepared.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The V-method cast steel composite coating is characterized by comprising the following components in parts by weight: 90-100 parts of refractory powder; 1.0-2.5 parts of suspending agent; 1.0-3.0 parts of adhesive; 0.2-0.4 part of auxiliary agent; 50-65 parts of alcohol-based solution; the suspending agent is organic modified bentonite;
the preparation method of the organic modified bentonite comprises the following steps: adding bentonite into distilled water, heating to 70-80 ℃, stirring for 1.5-2h, then adding a compound 1, continuing stirring for 2-4h, naturally cooling to room temperature after the reaction is completed, standing for 20-24h, filtering, placing filter residues at 60-70 ℃, and drying for 4-6h to obtain the organic modified bentonite;
the chemical structural formula of the compound 1 is as follows:
2. the V-method cast steel composite coating according to claim 1, wherein the preparation method of the compound 1 is as follows:
s1, sequentially adding p-aminochlorobenzyl chloride and pyridine into an N, N-dimethylformamide solution, cooling to-25-20 ℃, slowly dropwise adding phenyl chloroformate, and continuously stirring for reaction for 2-4 hours after dropwise adding to obtain a compound 2 with a chemical structural formula:
s2, sequentially adding the compound 2 and the dodecyl dimethyl tertiary amine into an ethanol solution, and carrying out reflux reaction for 9-12h at 80-85 ℃ to obtain the compound 1.
3. The composite coating for V-method cast steel according to claim 2, wherein the molar ratio of the p-aminochlorobenzyl chloride, phenyl chloroformate and pyridine in the step S1 is 1:1.2-1.4:2.0-2.5; the molar ratio of the compound 2 to the dodecyl dimethyl tertiary amine in the step S2 is 1:1.1-1.2.
4. The composite coating for V-method cast steel according to claim 1, wherein the refractory powder consists of zircon powder and quartz powder; the binder consists of polyvinyl butyral and rosin; the auxiliary agent is ferric oxide; the alcohol-based solution is 90-95% ethanol solution.
5. The V-method cast steel composite coating according to claim 4, wherein the mass ratio of zircon powder to quartz powder is 1:2-3; the mass ratio of the polyvinyl butyral to the rosin is 1:4-6.
6. The V-method cast steel composite coating according to claim 1, wherein the mass ratio of bentonite to compound 1 to distilled water is 1:0.5-0.8:25-30.
7. The method for preparing the V-method cast steel composite coating according to any one of claims 1 to 6, comprising the following steps:
(1) Respectively weighing refractory powder, a suspending agent, a binder, an auxiliary agent and an alcohol-based solution according to the weight ratio for standby;
(2) Sequentially adding the suspending agent and the binder into the alcohol-based solution, stirring at a high speed for 10-15min, then adding the refractory powder, continuously stirring for 15-20min, finally adding the auxiliary agent, and stirring at a low speed for 5-10min to obtain the composite coating.
8. The method for preparing the V-method cast steel composite coating according to claim 7, wherein the high speed is 800-1000r/min; the low speed is 200-300r/min.
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| CN101049943A (en) * | 2007-03-09 | 2007-10-10 | 广西大学 | Bentonite of organic acid, and preparation method |
| CN101734678A (en) * | 2009-12-23 | 2010-06-16 | 沈阳化工学院 | Organic modified bentonite and preparation method thereof |
| CN101870476A (en) * | 2010-05-14 | 2010-10-27 | 淄博联技化工有限公司 | Method for producing temperature-resistant organically modified bentonite |
| CN103302237A (en) * | 2013-06-21 | 2013-09-18 | 三门峡阳光铸材有限公司 | V-method casting coating and preparation method thereof |
| CN110576147A (en) * | 2019-11-04 | 2019-12-17 | 三门峡阳光铸材有限公司 | V-process cast steel composite coating and spraying device thereof |
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| CN101049943A (en) * | 2007-03-09 | 2007-10-10 | 广西大学 | Bentonite of organic acid, and preparation method |
| CN101734678A (en) * | 2009-12-23 | 2010-06-16 | 沈阳化工学院 | Organic modified bentonite and preparation method thereof |
| CN101870476A (en) * | 2010-05-14 | 2010-10-27 | 淄博联技化工有限公司 | Method for producing temperature-resistant organically modified bentonite |
| CN103302237A (en) * | 2013-06-21 | 2013-09-18 | 三门峡阳光铸材有限公司 | V-method casting coating and preparation method thereof |
| CN110576147A (en) * | 2019-11-04 | 2019-12-17 | 三门峡阳光铸材有限公司 | V-process cast steel composite coating and spraying device thereof |
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