CN109437911A - A kind of flame heat spray carbide composite ceramic stick and preparation method thereof - Google Patents
A kind of flame heat spray carbide composite ceramic stick and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of flame heat spray carbide composite ceramic stick and preparation method thereof, first have to use, 20-30 parts of zirconium oxides, 10-15 parts of carbon blacks and 15-25 parts of silicon carbide；Ingredient is weighed with other auxiliary materials such as a small amount of SiO2, CaO, screening, is uniformly mixed, and 45-55 parts of boric acid and a certain proportion of water, oil, glue, body mixing, rolling, then extrusion molding, drying and processing is added；Carbide composite ceramic stick is finally burnt under certain high temperature；It is relatively low that carbide composite ceramic stick produced by the invention solves existing traditional single silicon carbide ceramics coating fusing point, and fusing is easy in thermal spraying and is decomposed, thus the problem of causing coating composition and mirror image to form antioxygenic property that is unstable and influencing coating.
Description
Technical field
The present invention relates to thermal spraying ceramic stick preparation technical field, specially a kind of flame-spraying carbide composite ceramic
Stick and preparation method thereof.
Background technique
In the epoch that science and technology is greatly developed, ceramic thermal spray technology has been widely available application, at present nonmetallic materials
Thermal spraying mainly there is powder plasma to spray and flame heat spray technology, wherein plasma spraying method is multiple because of process unit
Miscellaneous, price is high, and the reasons application such as troublesome in poeration is limited, and the flame spray technique equipment of ceramic rod is simple, versatile, technique
Method is simple, keeps coating finer and close, wear-resisting, thus is used widely.
Different according to used spraying raw material, flame spray technique is divided into powder flame spraying and ceramic rod flame spray again
It applies, for powder flame spraying, since ceramic powder particle is heated by the flame in flight course, particle is in flame
The heating time being subject to is very short, therefore is commonly present the particle not melted sufficiently in the coating, causes coating uneven, and powder
Last utilization rate is low, has quite a few to be blown away by high gas velocity；And ceramic rod flame spraying is usually usual high-temperature oxygen, acetylene general
The melting of ceramic rod end, forms ceramics liquid drop, is then reinjected into the surface of workpiece, forms the ceramic coating of even compact.By
Still be liquid when drop is on striking work surface, and be accelerated to the speed of about 80 meter per seconds, first very big thermal energy and
Kinetic energy gets to workpiece substrate surface, therefore, can between matrix the excellent ceramic coating of forming properties, so, ceramic rod flame spray
Painting is a practical and effective ceramic spraying technology.
Existing traditional single silicon carbide ceramics coating fusing point is relatively low, and fusing is easy in thermal spraying and is decomposed, to make
Antioxygenic property that is unstable and influencing coating is formed at coating composition and mirror image, even if some composite ceramic coats are by carbon
SiClx and other ceramic materials carry out it is compound be modified processing, but traditional way be usually directly by silicon carbide be modified material
Material is mixed, and chemical reaction is not generated, therefore the binding force of the two is inadequate, while ratio setting and unreasonable, is caused most
End form at composite coating anti-oxidant and flushing resistance it is bad.
Summary of the invention
(1) technical solution
In view of the deficiencies of the prior art, the present invention provides a kind of flame-spraying carbide composite ceramic sticks and its preparation
Method；
To achieve the above object, the invention provides the following technical scheme:
A kind of flame-spraying carbide composite ceramic stick, the raw material including following parts by weight:
Major ingredient: 45-55 parts of boric acid, 20-30 parts of zirconium oxides, 10-15 parts of carbon blacks and 15-25 parts of silicon carbide；
Auxiliary material: 0.15 part of magnesia and 0.32 part of calcium oxide；
Liquid solvent: mass concentration be 4% polyvinyl alcohol and polyethylene glycol mixed solution, atoleine, glycerol and
Oleic acid；
Wherein, major ingredient silicon carbide and zirconium oxide are all made of purity 99% or more, and particle size range is in 2-10 μm of fine powder；
Major ingredient carbon black uses purity 99.5% or more, and particle size range is in 0.5-1 μm of fine powder.
The above-mentioned flame-spraying preparation method of carbide composite ceramic stick, includes the following steps:
(1) it stocks up: the auxiliary material in above-mentioned raw materials being subjected to dusting cover point, each component raw material is sized to particle size range and is existed
It is spare between 250-350 mesh；
(2) it grinds dry-mixed: the auxiliary material that step (1) has been sieved, and major ingredient zirconium oxide, carbon black and the silicon carbide got ready
According to the proportion ingredient in raw material, each raw material is successively then placed in progress mixing grinding, mixing time 4-5h in ball mill；
(3) prepared by pug: each powder taking-up of dry-mixed completion being placed in de-airing mixer, phase in ingredient is sequentially added
The boric acid of mass parts is answered, weight is equivalent to the oleic acid of above-mentioned dry mash weight 2-4%, the glycerol of 0.5-1%, 1-1.5% liquid
Paraffin is then gradually adding polyvinyl alcohol and polyethylene glycol mixed solution, and starts de-airing mixer and be mixed, until
Obtain plastic walk；
(4) press mold is homogenized: mixed pug being put into press mold in roller film laminator, further homogenizing mixing increases each
Combination density between raw material；
(5) extrusion molding: by the pug after the completion of press mold, being placed in extrusion molding in vacuum-extruder, and it is rodlike to obtain ceramics
Blank；
(6) it dries: the rodlike blank of ceramics of extrusion molding being placed on wooden supporting plate, is subsequently placed in vacuum drying oven and dries
It is dry, when drying to blank content liquid less than 10%；
(7) high temperature sintering: the rodlike blank of ceramics after drying is placed in kiln, ceramic rod blank is burnt through 1600 DEG C of high temperature
Form carbide composite ceramic bar stock material；
(8) finished product finishes: by carbide composite ceramic bar stock material made of sintering, being refined to outer diameter with numerically control grinder
For the rodlike standard component of 6.20-6.23mm, it is then packaged into finished product.
It is kiln furnace used in step (7) preferably to use horizontal sintering furnace；It is slow first when being sintered using horizontal sintering furnace
Slow heating, it is desirable that temperature is raised to 1000-1100 DEG C in 7-8 hours, and keeps the temperature 1-2 hours at this temperature, then proceedes to rise
Temperature to 1600 DEG C sintering 2-3 hours to get carbide composite ceramic bar stock material.
In order to further enhance the extrusion molding effect of plastic walk, the liquid of the plastic walk obtained in step (3) contains
Amount is 15-20%.
Vacuum drying temperature is preferably arranged to 140-160 DEG C in step (6).
(2) beneficial effect
The present invention provides a kind of flame-spraying carbide composite ceramic sticks and preparation method thereof to have following beneficial effect
Fruit:
Invention adds carbon according to proper ratio using the boric acid, zirconium oxide, carbon black for synthesizing zirconium diboride as raw material
SiClx powder is prepared by screening, ground and mixed, mud processed, extrusion molding, drying and high-temperature calcination in silicon carbide shape
At the composite ceramics stick of stable zirconium diboride layer；Due to ZrB2Crystal grain is in SiC particulate Surface Creation, and two kinds of crystal grain have
It is preferable to combine, it avoids ZrB simply2Powder and SiC powder directly mix, mud processed and high temperature sintering and the ceramics prepared
Stick, the coating formed in flame spraying process can cause the defect of sprayed surface uneven components due to the two density difference,
This kind of composite coating binding force is strong, can effectively solve the problem that single SiC ceramic material is easy fusing in thermal spraying and decomposes, to make
Defect that is unstable and influencing coating antioxygenic property is formed at coating composition and mirror image, while SiC coating can also be effectively retained
The advantageous property itself having.
The present invention is when preparing the carbide composite ceramic stick, using advanced sleeping burning technology, hangs firing technique phase with other
Than there is simple process, high production efficiency, qualification rate is higher, saves kiln space, thus more energy efficient.
Carbide composite ceramic stick prepared by the present invention can be used in ceramic rod flame spraying process means, by ceramic rod end
First melt is melted, and is formed ceramics liquid drop, is then reinjected into the surface of workpiece, ultimately forms the ceramic coating of even compact, different
In traditional carbide composite ceramic powder, it is only used for ceramic powders flame-spraying, this kind of ceramic powders flame-spraying is formed
Coating in be commonly present the particle not melted sufficiently, cause coating uneven, and powder using efficiency is low, there is quite a few quilt
High gas velocity is blown away.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of flame-spraying carbide composite ceramic stick, the raw material including following parts by weight:
Major ingredient: 45 parts of boric acid, 20 parts of zirconium oxides, 10 parts of carbon blacks and 15 parts of silicon carbide；
Auxiliary material: 0.15 part of magnesia and 0.32 part of calcium oxide；
Liquid solvent: mass concentration be 4% polyvinyl alcohol and polyethylene glycol mixed solution, atoleine, glycerol and
Oleic acid；
Wherein, major ingredient silicon carbide and zirconium oxide are all made of purity 99% or more, and particle size range is in 2-10 μm of fine powder；
Major ingredient carbon black uses purity 99.5% or more, and particle size range is in 0.5-1 μm of fine powder.
The above-mentioned flame-spraying preparation method of carbide composite ceramic stick, includes the following steps:
(1) it stocks up: the auxiliary material in above-mentioned raw materials being subjected to dusting cover point, each component raw material is sized to particle size range and is existed
It is spare between 250-350 mesh；
(2) it grinds dry-mixed: the auxiliary material that step (1) has been sieved, and major ingredient zirconium oxide, carbon black and the silicon carbide got ready
According to the proportion ingredient in raw material, each raw material is successively then placed in progress mixing grinding, mixing time 4h in ball mill；
(3) prepared by pug: each powder taking-up of dry-mixed completion being placed in de-airing mixer, phase in ingredient is sequentially added
Answer the boric acid of mass parts, weight is equivalent to the oleic acid of above-mentioned dry mash weight 2%, 0.5% glycerol, 1% atoleine, then
It is gradually added polyvinyl alcohol and polyethylene glycol mixed solution, and starts de-airing mixer and is mixed, until obtaining liquid
The plastic walk that content is 15%；
(4) press mold is homogenized: mixed pug being put into press mold in roller film laminator, further homogenizing mixing increases each
Combination density between raw material；
(5) extrusion molding: by the pug after the completion of press mold, being placed in extrusion molding in vacuum-extruder, and it is rodlike to obtain ceramics
Blank；
(6) it dries: the rodlike blank of ceramics of extrusion molding being placed on wooden supporting plate, is subsequently placed in vacuum drying oven and dries
Dry, vacuum drying temperature is set as 140 DEG C, when drying to blank content liquid less than 10%；
(7) high temperature sintering: the rodlike blank of ceramics after drying is placed in horizontal sintering furnace；Using horizontal sintering furnace into
When row sintering, slowly heating first, it is desirable that temperature is raised to 1000 DEG C in 7 hours, and keeps the temperature 1 hour at this temperature, then
1600 DEG C of sintering are continuously heating to 2 hours to get carbide composite ceramic bar stock material.
(8) finished product finishes: by carbide composite ceramic bar stock material made of sintering, being refined to outer diameter with numerically control grinder
For the rodlike standard component of 6.20-6.23mm, it is then packaged into finished product.
Embodiment 2
A kind of flame-spraying carbide composite ceramic stick, the raw material including following parts by weight:
Major ingredient: 50 parts of boric acid, 25 parts of zirconium oxides, 12 parts of carbon blacks and 20 parts of silicon carbide；
Auxiliary material: 0.15 part of magnesia and 0.32 part of calcium oxide；
Liquid solvent: mass concentration be 4% polyvinyl alcohol and polyethylene glycol mixed solution, atoleine, glycerol and
Oleic acid；
Wherein, major ingredient silicon carbide and zirconium oxide are all made of purity 99% or more, and particle size range is in 2-10 μm of fine powder；
Major ingredient carbon black uses purity 99.5% or more, and particle size range is in 0.5-1 μm of fine powder.
The above-mentioned flame-spraying preparation method of carbide composite ceramic stick, includes the following steps:
(1) it stocks up: the auxiliary material in above-mentioned raw materials being subjected to dusting cover point, each component raw material is sized to particle size range and is existed
It is spare between 250-350 mesh；
(2) it grinds dry-mixed: the auxiliary material that step (1) has been sieved, and major ingredient zirconium oxide, carbon black and the silicon carbide got ready
According to the proportion ingredient in raw material, each raw material is successively then placed in progress mixing grinding, mixing time 4.5h in ball mill；
(3) prepared by pug: each powder taking-up of dry-mixed completion being placed in de-airing mixer, phase in ingredient is sequentially added
Answer the boric acid of mass parts, weight is equivalent to the oleic acid of above-mentioned dry mash weight 3%, 0.7% glycerol, 1.2% atoleine, so
After be gradually added polyvinyl alcohol and polyethylene glycol mixed solution, and start de-airing mixer and be mixed, until obtaining liquid
The plastic walk that body content is 17%；
(4) press mold is homogenized: mixed pug being put into press mold in roller film laminator, further homogenizing mixing increases each
Combination density between raw material；
(5) extrusion molding: by the pug after the completion of press mold, being placed in extrusion molding in vacuum-extruder, and it is rodlike to obtain ceramics
Blank；
(6) it dries: the rodlike blank of ceramics of extrusion molding being placed on wooden supporting plate, is subsequently placed in vacuum drying oven and dries
Dry, vacuum drying temperature is set as 150 DEG C, when drying to blank content liquid less than 10%；
(7) high temperature sintering: the rodlike blank of ceramics after drying is placed in horizontal sintering furnace；Using horizontal sintering furnace into
When row sintering, slowly heating first, it is desirable that temperature is raised to 1050 DEG C in 7.5 hours, and keeps the temperature 1.5 hours at this temperature,
It then proceedes to be warming up to 1600 DEG C of sintering 2.5 hours to get carbide composite ceramic bar stock material.
(8) finished product finishes: by carbide composite ceramic bar stock material made of sintering, being refined to outer diameter with numerically control grinder
For the rodlike standard component of 6.20-6.23mm, it is then packaged into finished product.
Embodiment 3
A kind of flame-spraying carbide composite ceramic stick, the raw material including following parts by weight:
Major ingredient: 55 parts of boric acid, 30 parts of zirconium oxides, 15 parts of carbon blacks and 25 parts of silicon carbide；
Auxiliary material: 0.15 part of magnesia and 0.32 part of calcium oxide；
Liquid solvent: mass concentration be 4% polyvinyl alcohol and polyethylene glycol mixed solution, atoleine, glycerol and
Oleic acid；
Wherein, major ingredient silicon carbide and zirconium oxide are all made of purity 99% or more, and particle size range is in 2-10 μm of fine powder；
Major ingredient carbon black uses purity 99.5% or more, and particle size range is in 0.5-1 μm of fine powder.
The above-mentioned flame-spraying preparation method of carbide composite ceramic stick, includes the following steps:
(1) it stocks up: the auxiliary material in above-mentioned raw materials being subjected to dusting cover point, each component raw material is sized to particle size range and is existed
It is spare between 250-350 mesh；
(2) it grinds dry-mixed: the auxiliary material that step (1) has been sieved, and major ingredient zirconium oxide, carbon black and the silicon carbide got ready
According to the proportion ingredient in raw material, each raw material is successively then placed in progress mixing grinding, mixing time 5h in ball mill；
(3) prepared by pug: each powder taking-up of dry-mixed completion being placed in de-airing mixer, phase in ingredient is sequentially added
Answer the boric acid of mass parts, weight is equivalent to the oleic acid of above-mentioned dry mash weight 4%, 1% glycerol, 1.5% atoleine, then
It is gradually added polyvinyl alcohol and polyethylene glycol mixed solution, and starts de-airing mixer and is mixed, until obtaining liquid
The plastic walk that content is 20%；
(4) press mold is homogenized: mixed pug being put into press mold in roller film laminator, further homogenizing mixing increases each
Combination density between raw material；
(5) extrusion molding: by the pug after the completion of press mold, being placed in extrusion molding in vacuum-extruder, and it is rodlike to obtain ceramics
Blank；
(6) it dries: the rodlike blank of ceramics of extrusion molding being placed on wooden supporting plate, is subsequently placed in vacuum drying oven and dries
Dry, vacuum drying temperature is set as 160 DEG C, when drying to blank content liquid less than 10%；
(7) high temperature sintering: the rodlike blank of ceramics after drying is placed in horizontal sintering furnace；Using horizontal sintering furnace into
When row sintering, slowly heating first, it is desirable that temperature is raised to 1100 DEG C in 8 hours, and keeps the temperature 2 hours at this temperature, then
1600 DEG C of sintering are continuously heating to 3 hours to get carbide composite ceramic bar stock material.
(8) finished product finishes: by carbide composite ceramic bar stock material made of sintering, being refined to outer diameter with numerically control grinder
For the rodlike standard component of 6.20-6.23mm, it is then packaged into finished product.
The present invention adds carborundum powder according to proper ratio using the boric acid, zirconium oxide, carbon black for synthesizing zirconium diboride as raw material
Body is prepared by screening, ground and mixed, mud processed, extrusion molding, drying and high-temperature calcination and forms surely in silicon carbide
Determine the composite ceramics stick of zirconium diboride layer；Due to ZrB2Crystal grain is in SiC particulate Surface Creation, and two kinds of crystal grain have preferable
In conjunction with avoiding ZrB simply2Powder and SiC powder directly mix, mud processed and high temperature sintering and the ceramic rod prepared,
The coating formed in flame spraying process can cause the defect of sprayed surface uneven components, this kind due to the two density difference
Composite coating binding force is strong, can effectively solve the problem that single SiC ceramic material is easy fusing in thermal spraying and decomposes, to cause to apply
Composition of layer and mirror image form defect that is unstable and influencing coating antioxygenic property, while SiC coating can also be effectively retained itself
The advantageous property having.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of flame-spraying carbide composite ceramic stick, which is characterized in that the raw material including following parts by weight:
Major ingredient: 45-55 parts of boric acid, 20-30 parts of zirconium oxides, 10-15 parts of carbon blacks and 15-25 parts of silicon carbide；
Auxiliary material: 0.15 part of magnesia and 0.32 part of calcium oxide；
Liquid solvent: the polyvinyl alcohol and polyethylene glycol mixed solution, atoleine, glycerol and oleic acid that mass concentration is 4%.
2. flame-spraying according to claim 1 carbide composite ceramic stick, which is characterized in that major ingredient silicon carbide and oxygen
Change zirconium and be all made of purity 99% or more, and particle size range is in 2-10 μm of fine powder.
3. flame-spraying according to claim 1 carbide composite ceramic stick, which is characterized in that major ingredient carbon black is using pure
Degree is 99.5% or more, and particle size range is in 0.5-1 μm of fine powder.
4. the flame-spraying according to any one of claim 1-3 preparation method of carbide composite ceramic stick, special
Sign is, includes the following steps:
(1) it stocks up: the auxiliary material in above-mentioned raw materials being subjected to dusting cover point, each component raw material is sized to particle size range in 250-
It is spare between 350 mesh；
(2) grind dry-mixed: the auxiliary material that step (1) has been sieved, and major ingredient zirconium oxide, carbon black and the silicon carbide got ready according to
Then each raw material is successively placed in progress mixing grinding, mixing time 4-5h in ball mill by the proportion ingredient in raw material；
(3) prepared by pug: each powder taking-up of dry-mixed completion being placed in de-airing mixer, corresponding matter in ingredient is sequentially added
The boric acid of part is measured, weight is equivalent to the oleic acid of above-mentioned dry mash weight 2-4%, the glycerol of 0.5-1%, 1-1.5% atoleine,
It is then gradually adding polyvinyl alcohol and polyethylene glycol mixed solution, and starts de-airing mixer and is mixed, until obtaining
Plastic walk；
(4) press mold is homogenized: mixed pug being put into press mold in roller film laminator, further homogenizing mixing, increases each raw material
Between combination density；
(5) extrusion molding: by the pug after the completion of press mold, being placed in extrusion molding in vacuum-extruder, obtains the rodlike blank of ceramics；
(6) it dries: the rodlike blank of ceramics of extrusion molding being placed on wooden supporting plate, is subsequently placed in vacuum drying oven and dries, do
It is dry to blank content liquid less than 10% when；
(7) high temperature sintering: the rodlike blank of ceramics after drying is placed in kiln, ceramic rod blank is sintered at high temperature into through 1600 DEG C
Carbide composite ceramic bar stock material；
(8) finished product finishes: by carbide composite ceramic bar stock material made of sintering, being refined to outer diameter with numerically control grinder is
The rodlike standard component of 6.20-6.23mm, is then packaged into finished product.
5. the flame-spraying according to claim 4 preparation method of carbide composite ceramic stick, which is characterized in that step
(7) kiln furnace used in use horizontal sintering furnace.
6. the flame-spraying according to claim 5 preparation method of carbide composite ceramic stick, which is characterized in that make
When being sintered with horizontal sintering furnace, slowly heating first, it is desirable that temperature is raised to 1000-1100 DEG C in 7-8 hours, and herein
At a temperature of keep the temperature 1-2 hours, then proceed to be warming up to 1600 DEG C of sintering 2-3 hours to get carbide composite ceramic bar stock material.
7. the flame-spraying according to claim 4 preparation method of carbide composite ceramic stick, which is characterized in that step
Suddenly the content liquid of the plastic walk obtained in (3) is 15-20%.
8. the flame-spraying according to claim 4 preparation method of carbide composite ceramic stick, which is characterized in that step
Suddenly vacuum drying temperature is set as 140-160 DEG C in (6).
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