CN114717506A - Hard alloy sintering anti-sticking coating and preparation method thereof - Google Patents
Hard alloy sintering anti-sticking coating and preparation method thereof Download PDFInfo
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- CN114717506A CN114717506A CN202210232754.4A CN202210232754A CN114717506A CN 114717506 A CN114717506 A CN 114717506A CN 202210232754 A CN202210232754 A CN 202210232754A CN 114717506 A CN114717506 A CN 114717506A
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- 238000000576 coating method Methods 0.000 title claims abstract description 75
- 239000011248 coating agent Substances 0.000 title claims abstract description 68
- 239000000956 alloy Substances 0.000 title claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 24
- 238000005245 sintering Methods 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 26
- 238000007750 plasma spraying Methods 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 23
- 238000005488 sandblasting Methods 0.000 claims abstract description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 239000010937 tungsten Substances 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 8
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 239000011733 molybdenum Substances 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims 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 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- 229910017052 cobalt Inorganic materials 0.000 abstract description 11
- 239000010941 cobalt Substances 0.000 abstract description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 22
- 230000008569 process Effects 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000003870 refractory metal Substances 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
- 239000007921 spray Substances 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention provides a preparation method of a hard alloy sintering anti-sticking coating, which comprises the following steps: step S1, cleaning and drying the surface of the boat, and then carrying out sand blasting treatment; step S2, clamping the boat subjected to sand blasting treatment on a spraying working surface, and preheating; step S3, plasma spraying tungsten and/or molybdenum on the preheated boat to obtain a transition layer; step S4, plasma spraying metal oxide on the surface of the transition layer to obtain a working layer; step S5, repeating step S3 and step S4 in sequence; the hard alloy sintering anti-sticking coating prepared by the invention adopts the shell-like layered alternate structure coating, increases the thickness of the oxide coating, relieves the stress of the coating, improves the combination of the coating and the boat, enhances the isolation and protection effect of the coating, and prolongs the service life of the medium and high cobalt hard alloy sintering boat.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a hard alloy sintering anti-sticking coating and a preparation method thereof.
Background
The hard alloy is made of refractory metal hard compound and bonding metal by a powder metallurgy process, has the characteristics of high strength and hardness, good wear resistance and toughness, excellent heat resistance and corrosion resistance and the like, is used for manufacturing cutting tools, excavating tools, drilling tools, high-wear-resistance parts and the like, and is known as 'industrial teeth'. The production process mainly comprises the steps of powder preparation, mixing, pressing, sintering and the like. At sintering temperature, the wettability between the binding phase in the hard alloy and the boat is good, and diffusion and migration are easy to occur. With the increase of the content of the binder in the alloy components, the diffusion reaction is intensified, so that the defects of boat adhesion, carburization, deformation and the like of the product are easy to occur. Therefore, the sintering performance of the product can be effectively improved by adding the isolating layer between the hard alloy and the boat.
At present, anti-sticking coatings commonly used in the hard alloy industry mainly comprise graphite, carbon black, metal oxides, tween, PEG and the like, the coatings prepared by the coatings have poor adhesiveness and short service life, can be generally used for only 1 time, and have the defects of unstable quality, poor working environment, more labor and the like because the coatings need to be removed and new coatings need to be brushed again after each use.
The plasma spraying technology adopts high-temperature high-speed plasma jet as a heat source, can melt and spray all materials with physical melting points, and is one of the most widely applied spraying technologies at present. The plasma spraying technology has high deposition efficiency and low production cost, and can realize the preparation of large-size part coatings.
The surface anti-bonding method of the hard alloy parison sintering boat disclosed in the Chinese patent CN102744404A is characterized in that a zirconium oxide coating is prepared by a plasma spraying process, the use frequency of the zirconium oxide coating can reach 10 times, and the repeated use frequency of the zirconium oxide coating is lower. Patent CN110643929A discloses an anti-sticking coating on the surface of a sintered hard alloy boat and a preparation method thereof, wherein silicon carbide or aluminum oxide is sprayed on the surface of the boat as a transition layer, and then rare earth oxide is sprayed as a working layer, and the sintering frequency of the coating is about 40 times. However, the sintered products of the spraying boat disclosed at present are all blade or bar products with low cobalt content, and the middle and high cobalt products are not tested. With the increase of the cobalt content in the hard alloy components, the defects of boat adhesion, carburization and the like are more likely to occur in the product, so that the coating falls off, and the service life of the boat is further influenced.
In addition, since the difference in thermal expansion coefficient between the oxide coating and the boat is large, if the oxide coating is too thick, the coating is more likely to crack and peel. Therefore, the development of a coating material which is not easy to fall off and has long service life is urgently needed.
Disclosure of Invention
The invention provides a hard alloy sintering anti-sticking coating and a preparation method thereof, which can effectively solve the problem.
The invention provides a preparation method of a hard alloy sintering anti-sticking coating on one hand, which comprises the following steps:
step S1, cleaning and drying the surface of the boat, and then carrying out sand blasting treatment;
step S2, clamping the boat subjected to sand blasting treatment on a spraying working surface, and preheating;
step S3, plasma spraying tungsten and/or molybdenum on the preheated boat to obtain a transition layer;
step S4, plasma spraying metal oxide on the surface of the transition layer to obtain a working layer;
step S5, repeating the steps S3 and S4 in sequence.
In another aspect, the invention provides a cemented carbide sintered anti-sticking coating prepared by the method.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
the hard alloy sintering anti-sticking coating prepared by the invention adopts the shell-like layered alternate structure coating, increases the thickness of the oxide coating, relieves the stress of the coating, improves the combination of the coating and the boat, enhances the isolation and protection effect of the coating, and prolongs the service life of the medium and high cobalt hard alloy sintering boat.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic cross-sectional view of a cemented carbide sintered release coating provided in example 1 of the present invention;
FIG. 2 is a gold phase diagram of a cemented carbide sintered release coating provided in example 1 of the present invention;
fig. 3 is an appearance and appearance diagram of the cemented carbide sintered anti-adhesion coating provided in embodiment 1 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In one aspect, the present invention provides a method for preparing an anti-sticking coating layer by sintering hard alloy, comprising the following steps:
step S1, cleaning and drying the surface of the boat, and then carrying out sand blasting treatment;
step S2, clamping the boat subjected to sand blasting treatment on a spraying working surface, and preheating;
step S3, plasma spraying tungsten and/or molybdenum on the preheated boat to obtain a transition layer;
step S4, plasma spraying metal oxide on the surface of the transition layer to obtain a working layer;
step S5, repeating the steps S3 and S4 in sequence.
In the scheme, the prepared coating is not limited to a shell-like layered alternating structure mode of 2+2, and a shell-like layered alternating structure mode of 3+3 or more alternating structure layers can be adopted according to the actual application requirement.
Therefore, the surface of the boat can be coarsened, and the subsequent coating and the matrix can be combined conveniently.
Further, in step S1, the blasting treatment uses 40-100 mesh corundum grit, and the blasting grade is Sa3 grade.
The purpose of sand blasting is to coarsen the surface of the boat, which is beneficial to the combination of the subsequent coating and the matrix.
Further, in step S2, the preheating temperature is 80-200 ℃.
The purpose of the preheating is to remove moisture from the surface of the boat substrate and to reduce thermal stress between the boat and the coating.
Further, in step S3, the plasma spraying is:
the main gas is argon, and the flow rate of the main gas is 20-80L/min; the auxiliary gas is hydrogen, and the flow rate of the auxiliary gas is 1-15L/min; the powder feeding rate is 10-40 g/min; the spraying distance is 60-160 mm.
Further, in step S4, the plasma spraying is:
the main gas is argon, and the main gas flow is 20-80L/min; the auxiliary gas is hydrogen, and the flow rate of the auxiliary gas is 4-25L/min; the powder feeding rate is 15-70 g/min; the spraying distance is 60-160 mm.
Further, in step S4, the metal oxide is alumina or a rare earth oxide;
wherein the rare earth oxide is yttria, zirconia or yttria-stabilized zirconia.
Furthermore, the doping content of yttrium oxide in the yttrium oxide stabilized zirconia is more than or equal to 8 percent.
Example 1
Step S1, cleaning the boat by using alcohol and acetone to remove oil stains on the surface, and drying the cleaned boat at the drying temperature of 100 +/-10 ℃;
step S2, carrying out sand blasting and coarsening treatment on the dried boat by using 80-mesh corundum gravel, clamping the sand-blasted boat on a spraying workbench, and preheating the surface of the boat by using plasma flame flow, wherein the preheating temperature is 150 ℃;
s3, spraying a metal tungsten intermediate transition layer T1 on the surface of the boat by adopting plasma spraying equipment, wherein the thickness of the coating is 50 microns, and the spraying process parameters are as follows: the flow rate of main gas (argon) is 52L/min, the flow rate of auxiliary gas (hydrogen) is 10L/min, the powder feeding speed is 25g/min, and the spraying distance is 90 mm;
step S4, after the transition layer T1 is cooled, plasma spraying yttria-stabilized zirconia coating W1 (doping content of yttria is 10%) on the surface of the transition layer T1, wherein the coating thickness is 100 μm, and the spraying process parameters are as follows: the flow rate of main gas (argon) is 50L/min, the flow rate of auxiliary gas (hydrogen) is 12L/min, the powder feeding speed is 36g/min, and the spraying distance is 100 mm;
s5, after cooling the yttria-stabilized zirconia coating W1, plasma spraying a metal tungsten intermediate transition layer T2 on the surface of W1, wherein the thickness of the coating is 50 microns, and the spraying process parameters are consistent with those in the step S3;
and S6, after the intermediate transition layer T2 of the metal tungsten is cooled, plasma spraying an yttria stabilized zirconia coating W2 on the surface of the intermediate transition layer, wherein the thickness of the coating is 120 mu m, and the spraying process parameters are consistent with those in the step S4.
Finally obtaining the cemented carbide sintered anti-sticking coating A1.
Example 2
Step S1, cleaning the boat by using alcohol and acetone to remove oil stains on the surface, and drying the cleaned boat at the drying temperature of 100 +/-10 ℃;
step S2, carrying out sand blasting and coarsening treatment on the dried boat by using 80-mesh corundum gravel, clamping the sand-blasted boat on a spraying workbench, and preheating the surface of the boat by using plasma flame flow, wherein the preheating temperature is 190 ℃;
s3, spraying a metal molybdenum intermediate transition layer T1 on the surface of the boat by adopting plasma spraying equipment, wherein the thickness of the coating is 60 mu m, and the spraying process parameters are as follows: the flow rate of main gas (argon) is 55L/min, the flow rate of auxiliary gas (hydrogen) is 12L/min, the powder feeding speed is 20g/min, and the spraying distance is 110 mm;
step S4, after the transition layer T1 is cooled, plasma spraying yttrium oxide coating W1 on the surface of the transition layer T1, wherein the thickness of the coating is 130 μm, and the spraying process parameters are as follows: the flow rate of main gas (argon) is 48L/min, the flow rate of auxiliary gas (hydrogen) is 10L/min, the powder feeding speed is 32g/min, and the spraying distance is 120 mm;
step S5, after the yttrium oxide coating W1 is cooled, plasma spraying a metal tungsten intermediate transition layer T2 on the surface of W1, wherein the thickness of the coating is 60 mu m, and the spraying process parameters are consistent with those in the step S3;
and S6, after the molybdenum intermediate transition layer T2 is cooled, plasma spraying an yttrium oxide coating W2 on the surface of the molybdenum intermediate transition layer, wherein the thickness of the coating is 150 mu m, and the spraying process parameters are consistent with those in the step S4.
Finally obtaining the cemented carbide sintered anti-sticking coating A2.
Experimental example 1
The prepared cemented carbide sintering anti-sticking coating A1 can be used for burning medium and high cobalt cemented carbide products (such as stamping dies and drilling teeth products) with the cobalt content higher than 15 percent continuously for 40 times and 35 times, and the coating does not fall off in the process.
The prepared hard alloy sintering anti-sticking coating A2 can be used for burning medium and high cobalt hard alloy products (such as stamping dies and drilling tooth products) with the cobalt content higher than 15 percent continuously for 45 times and 38 times, wherein the high cobalt hard alloy products (the cobalt content is more than 20 percent), and the coating does not fall off in the process.
Experimental example 2
The cemented carbide sintered release coating a1 obtained in example 1 was subjected to electron microscope scanning and photographed as shown in fig. 2 to 3.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the hard alloy sintering anti-sticking coating is characterized by comprising the following steps of:
step S1, cleaning and drying the surface of the boat, and then carrying out sand blasting treatment;
step S2, clamping the boat subjected to sand blasting treatment on a spraying working surface, and preheating;
step S3, plasma spraying tungsten and/or molybdenum on the preheated boat to obtain a transition layer;
step S4, plasma spraying metal oxide on the surface of the transition layer to obtain a working layer;
and step S5, repeating the step S3 and the step S4 in sequence in a loop.
2. The method for preparing the cemented carbide sintered release coating according to claim 1, wherein in step S1, 40-100 mesh corundum grit is used for sand blasting with a sand blasting grade of Sa 3.
3. The method for preparing the cemented carbide sintered anti-adhesion coating according to claim 1, wherein the preheating temperature is 80-200 ℃ in step S2.
4. The method for preparing the cemented carbide sintered anti-sticking coating according to claim 1, wherein in step S3, the plasma spraying is:
the main gas is argon, and the flow rate of the main gas is 20-80L/min; the auxiliary gas is hydrogen, and the flow rate of the auxiliary gas is 1-15L/min; the powder feeding rate is 10-40 g/min; the spraying distance is 60-160 mm.
5. The method for preparing the cemented carbide sintered anti-adhesion coating as claimed in claim 1, wherein in step S4, the plasma spraying is:
the main gas is argon, and the flow rate of the main gas is 20-80L/min; the auxiliary gas is hydrogen, and the flow rate of the auxiliary gas is 4-25L/min; the powder feeding rate is 15-70 g/min; the spraying distance is 60-160 mm.
6. The method for producing a cemented carbide sintered release coating according to claim 1, wherein in step S4, the metal oxide is alumina or a rare earth oxide;
wherein the rare earth oxide is yttria, zirconia or yttria-stabilized zirconia.
7. The method for preparing the hard alloy sintered anti-sticking coating according to claim 6, wherein the doping content of yttria in the yttria-stabilized zirconia is not less than 8%.
8. A cemented carbide sintered release coating produced by the method for producing a cemented carbide sintered release coating according to any one of claims 1 to 7.
9. The cemented carbide sintered release coating of claim 8 comprising a plurality of alternating transition and working layers.
10. The cemented carbide sintered release coating according to claim 9, wherein the material of the transition layer is tungsten and/or molybdenum and the material of the working layer is a metal oxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210232754.4A CN114717506A (en) | 2022-03-09 | 2022-03-09 | Hard alloy sintering anti-sticking coating and preparation method thereof |
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| CN202210232754.4A CN114717506A (en) | 2022-03-09 | 2022-03-09 | Hard alloy sintering anti-sticking coating and preparation method thereof |
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| CN202210232754.4A Pending CN114717506A (en) | 2022-03-09 | 2022-03-09 | Hard alloy sintering anti-sticking coating and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643929A (en) * | 2019-11-05 | 2020-01-03 | 江西省科学院应用物理研究所 | Anti-sticking coating on surface of hard alloy sintered boat and preparation method thereof |
| CN111285677A (en) * | 2018-07-18 | 2020-06-16 | 中国兵器工业第五九研究所 | Preparation method of high-density laminated composite part |
| CN112159946A (en) * | 2020-09-04 | 2021-01-01 | 崇义章源钨业股份有限公司 | Anti-sticking coating, carbon-based boat and preparation method of anti-sticking coating |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111285677A (en) * | 2018-07-18 | 2020-06-16 | 中国兵器工业第五九研究所 | Preparation method of high-density laminated composite part |
| CN110643929A (en) * | 2019-11-05 | 2020-01-03 | 江西省科学院应用物理研究所 | Anti-sticking coating on surface of hard alloy sintered boat and preparation method thereof |
| CN112159946A (en) * | 2020-09-04 | 2021-01-01 | 崇义章源钨业股份有限公司 | Anti-sticking coating, carbon-based boat and preparation method of anti-sticking coating |
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Application publication date: 20220708 |