CN106077664A - A kind of bucket tooth and preparation method thereof - Google Patents
A kind of bucket tooth and preparation method thereof Download PDFInfo
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- CN106077664A CN106077664A CN201610704732.8A CN201610704732A CN106077664A CN 106077664 A CN106077664 A CN 106077664A CN 201610704732 A CN201610704732 A CN 201610704732A CN 106077664 A CN106077664 A CN 106077664A
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- bucket tooth
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- cermet coating
- raw material
- printer
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000011195 cermet Substances 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 49
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011159 matrix material Substances 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000011812 mixed powder Substances 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 239000011651 chromium Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 13
- 239000011733 molybdenum Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 13
- 239000010937 tungsten Substances 0.000 claims abstract description 13
- 230000004927 fusion Effects 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 46
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000002905 metal composite material Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims 1
- 230000002421 anti-septic effect Effects 0.000 abstract description 9
- 230000000704 physical effect Effects 0.000 abstract description 7
- 210000000515 tooth Anatomy 0.000 description 87
- 239000010410 layer Substances 0.000 description 26
- 238000005516 engineering process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010146 3D printing Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021386 carbon form Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002320 enamel (paints) Substances 0.000 description 1
- 150000002343 gold Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention provides a kind of bucket tooth, including bucket tooth matrix, the surface of described bucket tooth matrix is covered with the cermet coating with gradient-structure；In terms of mass fraction, described cermet coating is mainly formed by the spraying of 3D printer by following raw material: chromium 10 30 parts, silicon 5 12 parts, ferrum 30 40 parts, 5 13 parts of carbon, 30 40 parts of nickel, molybdenum 12 parts, 12 parts of tungsten.The preparation method of this bucket tooth includes: all raw material mixing and stirring making described cermet coating are made mixed-powder by (A)；(B) after the energetic particle beam that employing 3D printer produces is to described mixed-powder laser fusion, then 3D printer is used to be sprayed at described bucket tooth matrix surface,.The physical properties such as the bucket tooth antiseptic property of embodiment of the present invention offer, toughness, intensity are improved significantly, good stability.
Description
Technical field
The present invention relates to bucket tooth manufacture field, in particular to a kind of bucket tooth and preparation method thereof.
Background technology
Excavator bucket teeth is the vitals on excavator, is similar to the tooth of people, is also consumable accessory, is by toothholder and tooth
The Dipper Teeth of point composition, the two connects by bearing pin.
In view of the importance of bucket tooth, the highest to the physical property requirements of bucket tooth, such as its wearability, toughness and anti-
Corruption is all the important indicator needing in actual use to investigate, but the universal antiseptic property of bucket tooth is the best now, application
Time owing to being corroded by oxide and sour gas, the actual life of bucket tooth can be shortened, other physical properties of bucket tooth
Can the index such as toughness, intensity be not such as highly desirable, indirectly limit the value of its application, range also can be by corresponding
Restriction.
In view of this, the special proposition present invention.
Summary of the invention
The first object of the present invention is to provide a kind of bucket tooth, and described bucket tooth is by spelling with nothing on the top layer of bucket tooth matrix
Welding seam, integrated cermet coating, the physical property such as antiseptic property, toughness, intensity is improved significantly, stability
Good.
The second object of the present invention is to provide the preparation method of a kind of described bucket tooth, this preparation method to have method letter
Single, easy to operate, by 3D technology being used in combination ceramic-metal composite in the formation of bucket tooth matrix surface in manufacturing process
Having the cermet coating of gradient-structure, antiseptic property is good.
In order to realize the above-mentioned purpose of the present invention, spy by the following technical solutions:
Embodiments providing a kind of bucket tooth with superpower anticorrosion antiwear performance, this bucket tooth includes bucket tooth base
Body, the surface of bucket tooth matrix is covered with the cermet coating with gradient-structure, and wherein cermet coating is mainly led to by following raw material
Cross the spraying of 3D printer to be formed: in terms of mass fraction, chromium 10-30 part, silicon 5-12 part, ferrum 30-40 part, carbon 5-13 part, nickel 30-40
Part, molybdenum 1-2 part, tungsten 1-2 part, i.e. on the surface of bucket tooth matrix by 3D printing technique formation cermet coating, and this gold
Genus ceramic layer the rambling composite of mixing of non-generic, but the cermet material arranged in gradient, this knot
The cermet coating antiseptic property of structure is good, and anti-wear performance is excellent, and good combination property good stability simultaneously improves the use of bucket tooth
Life-span.The technical ceramics layer of this arrangement of gradients is actual by metal level, metal ceramic composite bed and ceramic layer three layers in gradient
Rearrange, more excellent three layers put in order for: be followed successively by metal level, ceramic metal from the inside to the outside along described bucket tooth matrix multiple
Close layer, ceramic layer.Due to the ceramic metallic material microstructure of this structure along some or certain several specific directions in even
Continuous change, thus eliminate thermal stress circle produced due to metal and the greatest differences of pottery physical parameter at material internal
Face, reaches to relax thermal stress and heat-resisting heat insulation purpose, and therefore, this ceramic metal functional material with gradient-structure has
The most powerful wear-resisting and Anticorrosive Character, 3D technology is specially applied on ceramic-metal composite just can prepare by the present invention
There is the cermet coating of special construction, the more conventional metal composite that carry out mix rambling with pottery wear-resisting
Performance and antiseptic property are the most excellent, it is possible to reach such effect and have selected the metal with this more excellent structure with inventor
Ceramic layer is overlying on bucket tooth matrix surface as wear-resistant protective layer and is undivided.Wherein metal level be positioned at innermost layer can be more preferable
Play antiseptic effect, be difficult to be corroded.
In prior art, excavator bucket teeth is the vitals on excavator, is similar to the tooth of people, is also consumable accessory,
The Dipper Teeth being made up of toothholder and crown, the two connects by bearing pin, in view of the importance of bucket tooth, the physical property to bucket tooth
Require the highest, but during practice, each side physical property of bucket tooth is the best, constrains its actual application value.
The present invention is to solve the technical problem appeared above, it is provided that the bucket tooth of a kind of anticorrosion antiwear, this bucket tooth has excellence
Performance.
Wherein, prepare in the raw material of cermet coating, because the fusing point of chromium and carbon is higher, print the process of spraying at 3D
In, chromium and carbon form hard phase chromium carbide, become the wear-resistant component that this cermet coating is main, thus improve bucket tooth itself
Anti-wear performance, ferrum, nickel fusing point relatively low, 3D print spraying during pass through liquid-phase sintering, it is possible to accelerate metal pottery
The molding of enamel coating, and during shaping, ferrum, the interior atoms granule of nickel can carry out reintegrating arrangement, crystallite dimension
Also can be controlled, and then be optimized microstructure and the performance of the compound of ferrum, nickel and generation, be improved the work of cermet coating
Skill processing characteristics, meanwhile, during shaping, it is possible to fill up the space between big particulate matter, it is to avoid the metal of shaping
There is defect in ceramic layer, and and bucket tooth matrix between form minority specioz, improve the adhesion between bucket tooth matrix.Non-
Metal material composition silicon can improve wetting property and the diffusion velocity of material composition, prints spraying by 3D, makes ceramic metal
Material forms metallurgical reaction with bucket tooth matrix, has the highest bond strength, can form the metal of densification at bucket tooth matrix surface
Ceramic layer, is difficult to come off from bucket tooth matrix surface, decreases scrapping in advance of the bucket tooth that causes because of coating shedding.And because
Silicon has good heat conductivility, it is possible to increase the heat conductivility of cermet coating so that cermet coating is in higher work
At a temperature of the most easy to crack, improve its service life.And transition metal molybdenum can improve the anti-wear performance of cermet coating comprehensively
And decay resistance, tungsten enables in particular to improve the stability of cermet coating so that it is using in hot environment also will not be easily
Oxidized or be corroded.The performance of the effect of these raw material components visible also depends on the connected applications of 3D technology.
It addition, the dosage of each component is all to have concrete limiting to require in raw material, because in chemical reaction field,
All knowing can be because the difference of addition can generate different products between compound, when the addition of chromium and carbon is excessive, and gold
Though the anti-wear performance belonging to ceramic layer is high, but in use, owing to long fricative heat is more, easily produce and collapse
Split.If addition is very few, its anti-wear performance will be short of.And the addition of ferrum and nickel too much time, at high temperature its crystal grain hold
The most excessive, the fragility in turn resulting in cermet coating is relatively big, is easily broken off.And addition very few time, cermet coating shape
During, easily produce void defects.And silicon can improve the heat conductivity of cermet coating, but, can weaken when adding too much
The stability of cermet coating, its with air in oxide be susceptible to reaction, and heat conduction when addition is very few, can be caused
Degradation.In visible raw material each component choose and how much the consumption of component is all for the product of the present invention
Specifically, lack any raw material or the most a certain raw material dosage is excessive or the too small property all influencing whether cermet coating
Can, thus affect service life and the actual application value of bucket tooth, the most only with specified raw material and the cooperation of the present invention
The cermet coating that 3D printing technique is prepared just has good performance.
Rockwell hardness standard C (HRC) of the cermet coating that the present invention is formed after measured reaches between 80-95, and
42CrMo typically at below HRC50, nickel-base antiwear alloy such as Ni-Cr alloy commonly used in the prior art, Ni-Cr-Mo alloy,
Ni-Cr-Fe alloy, Ni-Cu alloy, Ni-P and Ni-Cr-P alloy, Ni-Cr-Mo-Fe alloy etc., typically at below HRC60, can
See that the cermet coating that the present invention uses 3D technology to be formed improves the anti-wear performance of bucket tooth conscientiously.
In order to improve the accuracy rate that raw material uses, and then improve the quality of product, form each raw material of cermet coating
Usage amount is preferably: in terms of mass fraction, chromium 15-25 part, silicon 7-10 part, ferrum 32-38 part, carbon 6-10 part, nickel 30-37 part, molybdenum
1.2-1.8 part, tungsten 1.2-1.8 part.
More optimally, in terms of mass fraction, the consumption of each raw material is: chromium 20 parts, silicon 7 parts, ferrum 31 parts, 7 parts of carbon, nickel 35
Part, molybdenum 1.6 parts, 1.6 parts of tungsten.
The embodiment of the present invention, except providing a kind of bucket tooth, additionally provides the preparation method of this bucket tooth, comprises the steps:
(A) all raw material mixing and stirring making described cermet coating are made mixed-powder；
(B) after the energetic particle beam that employing 3D printer produces is to described mixed-powder laser fusion, then 3D is used to print
Machine is sprayed at described bucket tooth matrix surface,.
In this process, mixed-powder is melted by the energetic particle beam using 3D printer to produce, and uses after fusing
3D printer is sprayed at described bucket tooth matrix surface, is finally made finished product, and the melting efficiency of this energetic particle beam own is high, light beam
Quality is good, working stability.This process is simple, good product quality, reduces cost of manufacture for making anticorrosion antiwear bucket tooth.With
It is high that Shi Yinwei also has the stability after performance of technical process well, and shaping, in actual applications, than existing bucket tooth
Length more than 5 times in service life.According to test, this bucket tooth uses continuously, at least can use more than 5 years.And prior art makes
Bucket tooth on the premise of discontinuous use, be necessary for after substantially using 1 year changing, use cost is high.So, and existing
Some bucket tooths are compared, and performance is more excellent, and service life is long, and technique cost of manufacture is low, beneficially large-scale production and
Use on a large scale.
By utilizing cermet coating that 3D printing technique sprays except having the superior structural of gradient shape so that metal
It is higher that ceramic layer attaches performance, and difficult drop-off, more firmly, and is one-body molded, without any splicing gap, so in the future
During use, stability is more preferable, is difficult to be etched, and this advantage is that any one of prior art spraying technology cannot compare
Intend, be inventor's a kind of technology of combining that the practical situation of the present invention is specially selected.Only use the preparation method of the present invention
Special ceramic metal formula is coordinated to can be only achieved such effect.
While improving bucket tooth performance, in order to improve the service efficiency of bucket tooth and control use cost, at bucket tooth matrix table
The THICKNESS CONTROL of the cermet coating in face is 1.5-1.8mm, it is preferable that can control between 1.6-1.7mm.
In order to improve the stability of energetic particle beam fusion process, the energy density of energetic particle beam is preferably controlled in 90-
120J/mm2Between, the time of laser fusion controls at 2-3min, and to ensure the uniformity of distribution in fusion process, swashs
Light fusing time can not long can not be too short, long meeting makes cermet coating form impurity substances too much, Er Qieyi
The crystal grain of a little compounds generated meeting fast growth under high temperature long-time high-energy fused state, and then cause cermet coating
Easily brittle failure, and then affect the quality of cermet coating.And fusing time too short time, raw material can not react complete the most completely,
Final products are substandard product.Therefore it is highly preferred that the time of laser fusion best about 2min.
In order to improve the compactness of cermet coating, the mesh granularity of mixed-powder is preferably controlled in more than 200 mesh, preferably
200-300 mesh.
In order to improve the homogeneity of cermet coating, the stir speed (S.S.) of all raw material mix and blends controls at 100-
300rad/min, preferably 200rad/min.Stir speed (S.S.) can not be too fast, can destroy the effective ingredient of each composition, shadow in raw material
Ringing practical application effect, stir speed (S.S.) can not reach the purpose of mixing and stirring the most slowly.
Comparing with bucket tooth of the prior art, the anticorrosion antiwear bucket tooth that the present invention provides, not only anti-wear performance is good, and combines
Close stable performance, on the premise of using continuously, be at least its service life more than 5 years, improve the work efficiency of bucket tooth, simultaneously
Also reduce cost.
Compared with prior art, the invention have the benefit that
(1) the invention provides a kind of bucket tooth, this bucket tooth on the top layer of bucket tooth matrix with without splicing welding joint, one-body molded
Cermet coating, the physical property such as antiseptic property, toughness, intensity is improved significantly, and this cermet coating has
Unique trapezium structure, eliminates the thermal stress produced due to metal and the greatest differences of pottery physical parameter at material internal
Interface, reaches to relax thermal stress and heat-resisting heat insulation purpose, and stability improves；
(2) present invention is by being applied to cermet material field by 3D technology, during printing spraying at 3D,
The each component enabling to ceramic metal raw material plays one's part to the full, thus promotes ceramic-metallic performance, finally promotes bucket tooth
Using value, this technical value obtains large-scale popularization and application；
(3) mixed-powder is melted by the energetic particle beam that the preparation method of the bucket tooth of the present invention uses 3D printer to produce,
Using 3D printer to be sprayed at described bucket tooth matrix surface after fusing, be finally made finished product, this energetic particle beam itself melts
Efficiency is high, good beam quality, working stability；
(4) the 3D printing technique that have employed that the preparation method of the bucket tooth of the present invention is creative combines ceramic-metal composite
Technology of preparing, this bucket tooth manufacture field that is combined in still belongs to pioneering, substantially prolongs the service life of bucket tooth so that the property of bucket tooth
Can be greatly improved, the bucket tooth that the present invention prepares uses continuously, at least can use more than 5 years, and existing skill
The bucket tooth used in art, on the premise of discontinuous use, is necessary for after substantially using 1 year changing, and use cost is high, this
The technology of invention sufficiently lower use cost, expands the range of application of bucket tooth, creates certain economic benefit.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but those skilled in the art will
Understanding, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.In embodiment unreceipted specifically
Condition person, the condition advised according to normal condition or manufacturer is carried out.Agents useful for same or instrument unreceipted production firm person, be
Can be by the commercially available conventional products bought and obtain.
Embodiment 1
The preparation method of bucket tooth is as follows:
By chromium 10g, silicon 5g, ferrum 30g, carbon 5g, nickel 30g, molybdenum 1g, it is 200 mesh that tungsten 1g mixing and stirring makes mesh granularity
Above ceramic metal mixed-powder, utilizes 3D printer to produce energetic particle beam and realizes melting ceramic metal mixed-powder,
Wherein the energy density of energetic particle beam is 90J/mm2, the time of laser fusion is 2min, is adopted by ceramic metal after fusing
Spray on the steel surface of bucket tooth matrix with 3D printer, form fine and close cermet coating, one-body molded, without splicing seams
Gap, stability is higher.
Embodiment 2
The preparation method of bucket tooth is as follows:
By chromium 30g, silicon 12g, ferrum 40g, carbon 13g, nickel 40g, molybdenum 2g, it is 300 that tungsten 2g mixing and stirring makes mesh granularity
Purpose ceramic metal mixed-powder, mixing rate controls at 300rad/min, utilizes 3D printer to produce energetic particle beam and realizes
Melting ceramic metal mixed-powder, wherein the energy density of energetic particle beam is 100J/mm2, the time of laser fusion is
3min, uses 3D printer to spray on the steel surface of bucket tooth matrix by ceramic metal after fusing, form fine and close gold
Belonging to ceramic layer, the thickness of cermet coating is 1.6mm, is followed successively by metal level, ceramic metal from the inside to the outside along described bucket tooth matrix
Composite bed, ceramic layer up of three layers, one-body molded, without splicing gap, stability is higher.
Embodiment 3
The preparation method of bucket tooth is as follows:
By chromium 15g, silicon 7g, ferrum 32g, carbon 6g, nickel 30g, molybdenum 1.2g, tungsten 1.2g mixing and stirring is made mesh granularity and is
The ceramic metal mixed-powder of 200 mesh, mixing rate controls at 100rad/min, utilizes 3D printer to produce energetic particle beam real
Now melting ceramic metal mixed-powder, wherein the energy density of energetic particle beam is 120J/mm2, the time of laser fusion is
2.5min, uses 3D printer to spray on the steel surface of bucket tooth matrix by ceramic metal after fusing, form densification
Cermet coating, the thickness of cermet coating is 1.7mm, is followed successively by ceramic layer, metal pottery from the inside to the outside along described bucket tooth matrix
Porcelain composite bed, metal level up of three layers, one-body molded, without splicing gap, stability is higher.
Embodiment 4
The preparation method of bucket tooth is as follows:
By chromium 25g, silicon 10g, ferrum 38g, carbon 10g, nickel 37g, molybdenum 1.8g, tungsten 1.8g mixing and stirring is made mesh granularity and is
The ceramic metal mixed-powder of 250 mesh, mixing rate controls at 300rad/min, utilizes 3D printer to produce energetic particle beam real
Now melting ceramic metal mixed-powder, wherein the energy density of energetic particle beam is 110J/mm2, the time of laser fusion is
3min, uses 3D printer to spray on the steel surface of bucket tooth matrix by ceramic metal after fusing, form fine and close gold
Belonging to ceramic layer, the thickness of cermet coating is 1.8mm, is followed successively by ceramic layer, ceramic metal from the inside to the outside along described bucket tooth matrix
Composite bed, metal level up of three layers, one-body molded, without splicing gap, stability is higher.
Embodiment 5
The preparation method of bucket tooth is as follows:
By chromium 20g, silicon 7g, ferrum 31g, carbon 7g, nickel 35g, molybdenum 1.6g, tungsten 1.6g mixing and stirring is made mesh granularity and is
The ceramic metal mixed-powder of 200 mesh, mixing rate controls at 250rad/min, utilizes 3D printer to produce energetic particle beam real
Now melting ceramic metal mixed-powder, wherein the energy density of energetic particle beam is 100J/mm2, the time of laser fusion is
3min, uses 3D printer to spray on the steel surface of bucket tooth matrix by ceramic metal after fusing, form fine and close gold
Belonging to ceramic layer, the thickness of cermet coating is 1.5mm, is followed successively by metal level, ceramic metal from the inside to the outside along described bucket tooth matrix
Composite bed, ceramic layer up of three layers, one-body molded, without splicing gap, stability is higher.
Experimental example 1
The performance of commercially available common bucket tooth with the bucket tooth prepared by the preparation method of embodiments of the invention 2-3 is entered
Row compares, and concrete outcome see table 1.
Table 1 performance parameter compares
From table 1 it follows that the bucket tooth that the present invention prepares avoids conventional like product easily by the acid in environment
Property gas and oxidation material corrosion, antiseptic property and intensity is all greatly improved, and stability is good.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that without departing substantially from the present invention's
May be made that in the case of spirit and scope many other change and amendment.It is, therefore, intended that in the following claims
Including all such changes and modifications belonged in the scope of the invention.
Claims (10)
1. a bucket tooth, it is characterised in that include that bucket tooth matrix, the surface of described bucket tooth matrix are covered with the gold with gradient-structure
Belong to ceramic layer；
In terms of mass fraction, described cermet coating is mainly formed by the spraying of 3D printer by following raw material: chromium 10-30 part,
Silicon 5-12 part, ferrum 30-40 part, carbon 5-13 part, nickel 30-40 part, molybdenum 1-2 part, tungsten 1-2 part.
A kind of bucket tooth the most according to claim 1, it is characterised in that in terms of mass fraction, the master of described cermet coating
Raw material is wanted to include: chromium 15-25 part, silicon 7-10 part, ferrum 32-38 part, carbon 6-10 part, nickel 30-37 part, molybdenum 1.2-1.8 part, tungsten 1.2-
1.8 part.
A kind of bucket tooth the most according to claim 1, it is characterised in that in terms of mass fraction, the master of described cermet coating
Raw material is wanted to include: chromium 20 parts, silicon 7 parts, ferrum 31 parts, 7 parts of carbon, 35 parts of nickel, molybdenum 1.6 parts, 1.6 parts of tungsten.
A kind of bucket tooth the most according to claim 1, it is characterised in that described cermet coating is by metal level, ceramic metal
Composite bed and ceramic layer three layers rearrange in gradient.
A kind of bucket tooth the most according to claim 4, it is characterised in that be followed successively by metal from the inside to the outside along described bucket tooth matrix
Layer, metal ceramic composite bed, ceramic layer.
6. according to a kind of bucket tooth described in any one of claim 1-5, it is characterised in that the thickness of described cermet coating is
1.5-1.8mm。
7. the preparation method of a kind of bucket tooth described in any one of claim 1-6, it is characterised in that comprise the steps:
(A) all raw material mixing and stirring making described cermet coating are made mixed-powder；
(B) after the energetic particle beam that employing 3D printer produces is to described mixed-powder laser fusion, then 3D printer is used to spray
It is applied to described bucket tooth matrix surface,.
The preparation method of a kind of bucket tooth the most according to claim 7, it is characterised in that in described step (A), described mixing
The mesh Task-size Controlling of powder more than 200 mesh, preferably 200-300 mesh.
The preparation method of a kind of bucket tooth the most according to claim 7, it is characterised in that in described step (A), all raw materials
The stir speed (S.S.) of mix and blend controls at 100-300rad/min.
The preparation method of a kind of bucket tooth the most according to claim 7, it is characterised in that in described step (B), described height
The energy density of energy particle beam controls at 90-120J/mm2Between, the time of laser fusion controls at 2-3min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802231A (en) * | 2019-11-07 | 2020-02-18 | 齐鲁理工学院 | Method for improving 3D printing tissue compactness in mechanical pressure sizing |
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