CN103725945B - A kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof - Google Patents
A kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof Download PDFInfo
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- CN103725945B CN103725945B CN201410008720.2A CN201410008720A CN103725945B CN 103725945 B CN103725945 B CN 103725945B CN 201410008720 A CN201410008720 A CN 201410008720A CN 103725945 B CN103725945 B CN 103725945B
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- 239000011248 coating agent Substances 0.000 title claims abstract description 37
- 238000000576 coating method Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000005299 abrasion Methods 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 239000011268 mixed slurry Substances 0.000 claims abstract description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010937 tungsten Substances 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000007767 bonding agent Substances 0.000 claims abstract description 4
- 239000013530 defoamer Substances 0.000 claims abstract description 3
- 229910000048 titanium hydride Inorganic materials 0.000 claims description 16
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 9
- 238000001694 spray drying Methods 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 11
- 238000004873 anchoring Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011247 coating layer Substances 0.000 abstract description 2
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010936 titanium Substances 0.000 description 12
- 229910052719 titanium Inorganic materials 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 238000010286 high velocity air fuel Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000001238 wet grinding Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 229910003266 NiCo Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910000989 Alclad Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention discloses a kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof, belong to heat spray coating layer material technical field, described method includes: the TiH of WC, 2～15wt% with 75～88wt%2It is raw material with metallic binding phase powder；Described raw material adds the deionized water of scheduled volume and defoamer and account for described raw material gross weight 2～15% bonding agent after carry out mixing and ball milling, prepare mixed slurry；Described mixed slurry is prepared after being spray-dried agglomerated particle, more described agglomerated particle is prepared described tungsten carbide-base abrasion-resistant coating material through oversintering after broken.Powder particles fuse effect prepared by the present invention is preferably, anchoring strength of coating is higher, wearability is preferable, and the coating hardness of preparation is higher, toughness is preferable.
Description
Technical field
The present invention relates to a kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof, belong to heat spray coating layer material skill
Art field.
Background technology
Plasma spray technology can prepare one layer of protective coating rapidly at surface of the work, gives that surface of the work is wear-resisting, anti-corrosion, subtracts
The different performance such as rub, obturage.Tungsten carbide-base cermet has the performances such as hardness height, good toughness, is widely used in aviation
The industries such as space flight, metallurgy, petrochemical industry, machinery.In terms of commercial Application, HVAF is because its spraying rate is fast, combustion
Burning temperature is relatively low, and carbide decarburization is few, and anchoring strength of coating is high, is to be best suitable for sprayed wc based ceramic metal at present
Method.Common tungsten carbide-base cermet used for hot spraying include WC-12Co, WC-17Co, WC-10Co4Cr,
WC-Cr3C2-Ni, WC-Ni etc..
Thermal spray process is to utilize high velocity air that melted or semi-molten state granularity are deposited in the process of matrix surface, powder material
The fusing degree of material is on coating performance impact greatly.The temperature of HVAF is between 2200～3000 DEG C, and particle adds
The heat time is short, and some particles is distributed in beyond flame stream high-temperature region at motion process, and these all can cause in spraying process and occur not
Molten particle, thus cause the phenomenons such as coating deposition is low, coating is half-cooked, the serious bond strength reducing coating and wearability etc.
Performance.Although the fusing degree that powder is overall can be improved by changing spraying parameter, but improve limitation.Additionally
In spraying process, owing to spraying the inhomogeneities in flame stream temperature field, a part of powder can be made to superfuse, in the powder of superfusion
WC can be dissolved in metallic binding phase cobalt or nickel, in cooling procedure separate out η phase tungsten carbide (CoxW6-xC), this
η phase tungsten carbide reduces the hardness of tungsten carbide and ceramic-metallic toughness, become affect tungsten carbide-base coating performance main because of
Element.
Summary of the invention
The present invention proposes a kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof, to solve existing thermal spraying
During can reduce hardness and the problem of ceramic-metallic toughness of tungsten carbide.To this end, the present invention proposes following technical side
Case:
A kind of tungsten carbide-base abrasion-resistant coating material of high rigidity, the elemental metals of WC, 2～15wt% including 75～88wt%
Ti, surplus is W metal or Co or NiCo alloy.
A kind of preparation method of high-hardness tungsten carbide base abrasion-resistant coating material, including:
The TiH2 of WC, 2～15wt% with 75～88wt% and metallic binding phase powder are as raw material；
In described raw material, add deionized water and the defoamer of scheduled volume and account for described raw material gross weight 2～the bonding agent of 15%
After carry out mixing and ball milling, prepare mixed slurry；
Described mixed slurry is prepared after being spray-dried agglomerated particle, then by described agglomerated particle through oversintering and broken after
Prepare described tungsten carbide-base abrasion-resistant coating material.
As seen from the above technical solution provided by the invention, powder particles fuse prepared by the method using the present invention to provide
Effect is preferably, anchoring strength of coating is higher, wearability is preferable, and the coating hardness of preparation is higher, toughness is preferable.
Detailed description of the invention
The detailed description of the invention of the present invention proposes a kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof, and it is former
Reason is to utilize the fusing degree that can improve dusty spray from exothermic reaction in spraying raw material, such as nickel alclad composite powder, profit
The fusing degree of powder is improve with reaction between nickel and aluminium in spraying process.Therefore the present invention is at tungsten carbide wc Base Metal
Pottery adds appropriate titanium simple substance, utilizes the heat in spraying process to cause the reaction of titanium and tungsten carbide, improve powder
Fusing degree；In powder particle cooling procedure, owing to titanium is the carbide former more higher than tungsten, η phase tungsten carbide
(CoxW6-xC) carbon in can preferentially be combined with titanium, generates Ti1-xC or TixW1-xC, reduces η phase tungsten carbide (CoxW6- xC) generation, simultaneously Ti1-xC or TixW1-xThe hardness (about more than HV2200) of C is higher than WC (HV1800),
Be conducive to improving coating hardness, simultaneously η phase tungsten carbide (CoxW6-xC) minimizing is also beneficial to the raising of coating toughness.
Further, in order to ensure the uniformity of composition, the particle diameter of material powder typically requires below 10 μm, and this is concrete
The TiH2 that embodiment uses is readily available particle diameter particulate powders below 5 μm, and oxygen content is low, and TiH2 exists simultaneously
Vacuum 600～800 DEG C decomposite pure titanium valve.
Concrete, the tungsten carbide-base abrasion-resistant coating material of the high rigidity that this detailed description of the invention provides includes 75～88wt%
The elemental metals Ti of WC, 2～15wt%, surplus is W metal or Co or NiCo alloy.
The preparation method of the high-hardness tungsten carbide base abrasion-resistant coating material that this detailed description of the invention provides includes:
Step 1, with WC (0.8～8 μm), TiH2, metallic binding phase powder (cobalt powder, nickel powder or cobalt powder and chromium powder mixed
Compound) it is raw material, the percentage by weight that wherein WC accounts for is 75～88%, TiH2The percentage by weight accounted for is 2～15%, wherein
WC and TiH2Shared percentage by weight summation is not more than 90%, and surplus is metallic binding phase powder；
Step 2, adding appropriate deionized water in above-mentioned raw materials is wet grinding media, adds and to account for raw material gross weight 2～15%
Polyvinyl alcohol is binding agent, adds proper quantity of defoaming agent etc., ball milling more than 4 hours, prepares mixed slurry；
Step 3, inputs centrifugal atomizing spray drying device, inlet temperature 180～280 DEG C, outlet temperature by above-mentioned mixed slurry
100～190 DEG C, atomizing disk rotating speed 5000～20000r/min, feeding amount 100～400ml/min, it is thus achieved that agglomerated particle；
Step 4, is placed in vacuum degumming stove heating by above-mentioned agglomerated particle, is incubated more than 1 hour at 800 DEG C, then exists
1150～1300 DEG C of sintering, come out of the stove after cooling to the furnace at 100 DEG C after being incubated 2 hours；
Step 5, by the blank crushing and screening classification after sintering, it is thus achieved that use the powder requiring particle diameter.
Make below by high-hardness tungsten carbide base abrasion-resistant coating material that the present invention is proposed by specific embodiment and preparation method thereof
Describe in detail.
Embodiment 1:
With WC (0.8～2 μm), TiH2, cobalt powder be raw material, wherein WC accounts for 75%, TiH2Accounting for 15%, Co powder accounts for
10%；By WC, TiH2, Co mixing and ball milling, adding appropriate deionized water is wet grinding media, adds that to account for mixed-powder total
The polyvinyl alcohol weighing 10% is binding agent, adds proper quantity of defoaming agent etc., ball milling 8 hours；Mixed slurry is inputted centrifugal atomizing spray
Mist drying equipment, inlet temperature 270 DEG C, outlet temperature 180 DEG C, atomizing disk rotating speed 18000r/min, feeding amount
300ml/min, obtains agglomerated particle in exit；Particle after reuniting is placed in vacuum degumming stove, vacuumizes, vacuum
Begin to warm up when degree is less than 3Pa, be heated to insulation 1 hour when 800 DEG C, then heat to 1280 DEG C of sintering, be incubated 2 hours
After cool to the furnace at 100 DEG C after come out of the stove；By the blank crushing and screening classification after sintering, choose the powder conduct of 15～45 μm
Finished product.Detection understands in powder and accounts for 77% containing WC, and Ti accounts for 14%, and cobalt is surplus.This powder is through HVAF
Without the no cofusing particle being mingled with in the coating of rear preparation, coating microhardness is more than HV1400, and anchoring strength of coating is more than
70MPa。
Embodiment 2:
With WC (5～8 μm), TiH2, cobalt powder be raw material, wherein WC accounts for 85%, TiH2Accounting for 3%, Co powder accounts for 12%；
By WC, TiH2, Co mixing and ball milling, adding appropriate deionized water is wet grinding media, add account for mixed-powder gross weight 15%
Polyvinyl alcohol be binding agent, add proper quantity of defoaming agent etc., ball milling 8 hours；Mixed slurry inputs centrifugal atomizing be spray-dried
Equipment, inlet temperature 220 DEG C, outlet temperature 130 DEG C, atomizing disk rotating speed 12000r/min, feeding amount 200ml/min,
Exit obtains agglomerated particle；Particle after reuniting is placed in vacuum degumming stove, vacuumizes, and opens when vacuum is less than 3Pa
Begin to heat, be heated to insulation 1 hour when 800 DEG C, then heat to 1180 DEG C of sintering, cool to the furnace after being incubated 3 hours
Come out of the stove after at 100 DEG C；By the blank crushing and screening classification after sintering, choose the powder of 10～45 μm as finished product.Detection can
Knowing in powder and account for 84% containing WC, Ti accounts for 2.5%, and cobalt is surplus.The painting that this powder is prepared after HVAF
Without the no cofusing particle being mingled with in Ceng, coating microhardness is more than HV1600, and anchoring strength of coating is more than 70MPa.
Embodiment 3:
With WC (2～5 μm), TiH2, cobalt powder, chromium powder be raw material, wherein WC accounts for 75%, TiH2Account for 11%, Co powder
Accounting for 10%, Cr powder accounts for 4%；By WC, TiH2, Co, Cr mixing and ball milling, adding appropriate deionized water is wet grinding media,
It is binding agent that addition accounts for the polyvinyl alcohol of mixed-powder gross weight 15%, adds proper quantity of defoaming agent etc., ball milling 8 hours；By compound
Slurry input centrifugal atomizing spray drying device, inlet temperature 220 DEG C, outlet temperature 130 DEG C, atomizing disk rotating speed
12000r/min, feeding amount 200ml/min, agglomerated particle is obtained in exit；Particle after reuniting is placed in vacuum degumming
In stove, vacuumize, begin to warm up when vacuum is less than 3Pa, be heated to insulation 1 hour when 800 DEG C, then heat to 1230
DEG C sintering, come out of the stove after cooling to the furnace at 100 DEG C after being incubated 3 hours；By the blank crushing and screening classification after sintering, choose
The powder of 10～45 μm is as finished product.Detection understands in powder and accounts for 75% containing WC, and Ti accounts for 10.5%, and cobalt is 11%,
Surplus is chromium.Without the no cofusing particle being mingled with in the coating that this powder is prepared after HVAF, coating microhardness is big
In HV1500, anchoring strength of coating is more than 70MPa.
Using the technical scheme that this detailed description of the invention provides, the powder particles fuse effect of preparation is preferable, anchoring strength of coating
Higher, wearability is preferable, and the coating hardness of preparation is higher, toughness is preferable.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, and appoints
What those familiar with the art in the technical scope that the embodiment of the present invention discloses, the change that can readily occur in or replace
Change, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection of claim
Scope is as the criterion.
Claims (5)
1. the preparation method of a high-hardness tungsten carbide base abrasion-resistant coating material, it is characterised in that including:
The TiH of WC, 2～15wt% with 75～88wt%2It is raw material with metallic binding phase powder；
In described raw material, add deionized water and the defoamer of scheduled volume and account for described raw material gross weight 2～the bonding agent of 15%
After carry out mixing and ball milling, prepare mixed slurry；
Described mixed slurry is prepared after being spray-dried agglomerated particle, then by described agglomerated particle through oversintering and broken after
Prepare described tungsten carbide-base abrasion-resistant coating material；
Wherein, described spray drying uses centrifugal atomizing spray drying device, in spray-drying process, described centrifugal atomizing
The inlet temperature of spray drying device is 180～280 DEG C, and outlet temperature is 100～190 DEG C, and atomizing disk rotating speed is
5000～20000r/min, feeding amount is 100～400ml/min；Described sintering is included in 800 DEG C and is incubated at least 1 hour,
Then sinter under the conditions of 1150～1300 DEG C, come out of the stove after cooling to the furnace at 100 DEG C after being incubated 2 hours.
Preparation method the most according to claim 1, it is characterised in that WC and TiH2Wt% summation be less than
90%.
Preparation method the most according to claim 1, it is characterised in that described metallic binding phase powder is cobalt powder, nickel
The mixture of powder or cobalt powder and chromium powder.
Preparation method the most according to claim 1, it is characterised in that described bonding agent is polyvinyl alcohol.
Preparation method the most according to claim 1, it is characterised in that the time of described ball milling is at least 4 hours.
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| CN104233158A (en) * | 2014-09-11 | 2014-12-24 | 芜湖鼎瀚再制造技术有限公司 | Ni60A-WC nano-coating and preparation method thereof |
| CN105369178A (en) * | 2015-12-01 | 2016-03-02 | 北京矿冶研究总院 | Preparation method of molten zinc corrosion resistant spray coating material |
| CN105316617B (en) * | 2015-12-01 | 2018-03-20 | 北京矿冶研究总院 | Preparation method of micro-nano structure tungsten carbide coating |
| CN106244970A (en) * | 2016-08-30 | 2016-12-21 | 赣州澳克泰工具技术有限公司 | Hot spray powder and preparation method thereof |
| CN111185591B (en) * | 2020-02-18 | 2022-05-10 | 北京科技大学广州新材料研究院 | TiC high manganese steel composite material and preparation method thereof |
| CN111826570B (en) * | 2020-07-23 | 2021-11-16 | 矿冶科技集团有限公司 | High-temperature-resistant and high-wear-resistant nickel-based titanium carbide powder and preparation method thereof |
| CN114570924B (en) * | 2022-04-29 | 2022-07-22 | 矿冶科技集团有限公司 | Binder, 5-15 micron tungsten carbide powder and preparation method thereof |
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| CN101122002A (en) * | 2007-09-28 | 2008-02-13 | 清华大学 | Method for preparing special-purpose coat for breadboard or circuit board crushing knife tool |
| CN102418065A (en) * | 2011-12-12 | 2012-04-18 | 中国矿业大学 | Composite metal carbide wear-resistant coating and preparation process thereof |
| CN102605230A (en) * | 2012-03-30 | 2012-07-25 | 南京航空航天大学 | Bi-phase nano particle reinforced titanium alloy protective coating and preparation method of bi-phase nano particle reinforced titanium alloy protective coating |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122002A (en) * | 2007-09-28 | 2008-02-13 | 清华大学 | Method for preparing special-purpose coat for breadboard or circuit board crushing knife tool |
| CN102418065A (en) * | 2011-12-12 | 2012-04-18 | 中国矿业大学 | Composite metal carbide wear-resistant coating and preparation process thereof |
| CN102605230A (en) * | 2012-03-30 | 2012-07-25 | 南京航空航天大学 | Bi-phase nano particle reinforced titanium alloy protective coating and preparation method of bi-phase nano particle reinforced titanium alloy protective coating |
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