CN103725945A - High hardness tungsten carbide base wear-resistant coating material and preparation method thereof - Google Patents
High hardness tungsten carbide base wear-resistant coating material and preparation method thereof Download PDFInfo
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- CN103725945A CN103725945A CN201410008720.2A CN201410008720A CN103725945A CN 103725945 A CN103725945 A CN 103725945A CN 201410008720 A CN201410008720 A CN 201410008720A CN 103725945 A CN103725945 A CN 103725945A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 39
- 238000000576 coating method Methods 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 title claims abstract description 18
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- 239000011268 mixed slurry Substances 0.000 claims abstract description 11
- 238000001694 spray drying Methods 0.000 claims abstract description 8
- 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
- 239000013530 defoamer Substances 0.000 claims abstract description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 17
- 239000010936 titanium Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 14
- 238000005299 abrasion Methods 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 11
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 239000010937 tungsten Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 238000002156 mixing 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
- 229910003266 NiCo Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 2
- 238000006062 fragmentation reaction Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 229910000048 titanium hydride Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 2
- 238000007751 thermal spraying Methods 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 238000010285 flame spraying Methods 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 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
- 238000001238 wet grinding Methods 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 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
- 229910019543 CoxW Inorganic materials 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
- 239000011247 coating layer 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
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a high hardness tungsten carbide base wear-resistant coating material and a preparation method thereof and belongs to the technical field of thermal spraying coating materials. The method comprises the following steps of: by taking 75-88wt% of WC, 2-15wt% of TiH2 and metal binding phase powder as raw materials, adding predetermined amount of deionized water, a defoamer and a binding material accounting for 2-15% of total weight of the raw materials into the raw materials to carry out mixed ball milling to prepare mixed slurry, carrying out spray drying on the mixed slurry to prepare agglomerated particles, and sintering and crushing the agglomerated particles to prepare the tungsten carbide base wear-resistant coating material. The prepared powder particles are good in melting effect, a coating is high in bonding strength and good in abrasive resistance, and the prepared coating is high in hardness and good in tenacity.
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 technical field.
Background technology
Hot-spraying techniques can be prepared one deck protective coating rapidly at workpiece surface, gives that workpiece surface is wear-resisting, anti-corrosion, antifriction, the different performance such as obturage.Tungsten carbide-base sintering metal has the performances such as hardness is high, good toughness, is widely used in the industries such as aerospace, metallurgy, petrochemical industry, machinery.Aspect industrial application, hypersonic flame spraying is because its spraying rate is fast, temperature of combustion is relatively low, and carbide decarburization is few, and anchoring strength of coating is high, is the method for the most applicable current sprayed wc based ceramic metal.Common used for hot spraying tungsten carbide-base sintering metal comprises WC-12Co, WC-17Co, WC-10Co4Cr, WC-Cr
3c
2-Ni, WC-Ni etc.
Thermal spray process is to utilize high velocity air melting or semi-melting state granularity to be deposited in to the process of matrix surface, and the fusing degree of powdered material on coating performance impact greatly.The temperature of hypersonic flame spraying is between 2200～3000 ℃, particle is short heat-up time, part particle is beyond moving process is distributed in flame stream high-temperature zone, these all can cause and in spraying process, occur no cofusing particle, thereby cause the phenomenons such as coating deposition is low, coating is half-cooked, seriously reduce the performances such as the bonding strength of coating and wear resistance.Although can improve the fusing degree of powder integral body by changing spraying parameter, raising degree is limited.In spraying process, the ununiformity due to spraying flame stream temperature field, can make a part of powder superfuse in addition, and the WC in the powder of superfusion can be dissolved in metallic binding phase cobalt or nickel, separates out η phase wolfram varbide (Co in process of cooling
xw
6-xc), this η phase wolfram varbide has reduced hardness and the ceramic-metallic toughness of wolfram varbide, becomes the principal element that affects tungsten carbide-base coating performance.
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 in existing thermal spray process, can reduce the hardness of wolfram varbide and the problem of ceramic-metallic toughness.For this reason, the present invention proposes following technical scheme:
A tungsten carbide-base abrasion-resistant coating material for high rigidity, comprises the elemental metals Ti of WC, the 2～15wt% of 75～88wt%, and surplus is metal Ni or Co or NiCo alloy.
A preparation method for high-hardness tungsten carbide base abrasion-resistant coating material, comprising:
Take the WC of 75～88wt%, the TiH2 of 2～15wt% and metallic binding phase powder are raw material;
After adding deionized water and the defoamer of predetermined amount and account for the caking agent of described raw material gross weight 2～15% in described raw material, carry out mixing and ball milling, make mixed slurry;
After described mixed slurry is dried through spraying, make agglomerating particles, more described agglomerating particles is made to described tungsten carbide-base abrasion-resistant coating material after oversintering and fragmentation.
As seen from the above technical solution provided by the invention, adopt powder particle fusing effect prepared by method provided by the invention better, anchoring strength of coating is higher, wear resistance is better, the coating hardness of preparation is higher, toughness is better.
Embodiment
The specific embodiment of the present invention has proposed a kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof, its principle is to utilize from thermopositive reaction, can improve the fusing degree of dusty spray in spraying raw material, as nickel alclad composite powder, utilize the reaction between nickel and aluminium in spraying process to improve the fusing degree of powder.Therefore the present invention adds appropriate titanium metal simple substance in tungsten carbide wc based ceramic metal, utilizes heat in spraying process to cause reacting of titanium and wolfram varbide, the fusing degree of raising powder; In powder particle process of cooling, because titanium is the carbide forming element stronger than tungsten, η phase wolfram varbide (Co
xw
6-xc) carbon in can be preferentially combined with titanium, generates Ti
1-xc or Ti
xw
1-xc, reduces η phase wolfram varbide (CoxW
6- xc) generation, simultaneously Ti
1-xc or Ti
xw
1-xthe hardness of C (more than being about HV2200) is higher than WC (HV1800), is conducive to improve coating hardness, simultaneously η phase wolfram varbide (Co
xw
6-xc) minimizing is also conducive to the raising of coating toughness.
Further, in order to guarantee the homogeneity of composition, the particle diameter general requirement of raw material powder is below 10 μ m, and the TiH2 that this embodiment adopts easily obtains the particulate powders of particle diameter below 5 μ m, and oxygen level is low, TiH2 decomposites pure titanium valve in 600～800 ℃, vacuum simultaneously.
Concrete, the tungsten carbide-base abrasion-resistant coating material of the high rigidity that this embodiment provides comprises the elemental metals Ti of WC, the 2～15wt% of 75～88wt%, surplus is metal Ni or Co or NiCo alloy.
The preparation method of the high-hardness tungsten carbide base abrasion-resistant coating material that this embodiment provides comprises:
Step 1, with WC (0.8～8 μ m), TiH
2, metallic binding phase powder (mixture of cobalt powder, nickel powder or cobalt powder and chromium powder) is raw material, the weight percent that wherein WC accounts for is 75～88%, TiH
2the weight percent accounting for is 2～15%, wherein WC and TiH
2shared weight percent summation is not more than 90%, and surplus is metallic binding phase powder;
Step 2, in above-mentioned raw materials, adding appropriate deionized water is wet grinding media, and adding the polyvinyl alcohol that accounts for raw material gross weight 2～15% is binding agent, adds proper quantity of defoaming agent etc., and ball milling more than 4 hours, makes mixed slurry;
Step 3, by above-mentioned mixed slurry input centrifugal atomizing spray drying device, 180～280 ℃ of inlet temperatures, 100～190 ℃ of temperature outs, atomizing disk rotating speed 5000～20000r/min, feeding amount 100～400ml/min, obtains agglomerating particles;
Step 4, is placed in vacuum degumming stove by above-mentioned agglomerating particles and heats, and 800 ℃ of insulations, more than 1 hour, then at 1150～1300 ℃ of sintering, is incubated after cooling to the furnace at 100 ℃ after 2 hours and comes out of the stove;
Step 5, by the blank crushing and screening classification after sintering, obtains the powder of service requirements particle diameter.
The preparation method of Magnetic Spherical matrix material the present invention being proposed below by specific embodiment elaborates.
Embodiment 1:
With WC (0.8～2 μ m), TiH
2, cobalt powder is raw material, wherein WC accounts for 75%, TiH
2account for 15%, Co powder and account for 10%; By WC, TiH
2, Co mixing and ball milling, adding appropriate deionized water is wet grinding media, adding the polyvinyl alcohol that accounts for mixed powder gross weight 10% is binding agent, adds proper quantity of defoaming agent etc., ball milling 8 hours; Mixed slurry is inputted to centrifugal atomizing spray drying device, 270 ℃ of inlet temperatures, 180 ℃ of temperature outs, atomizing disk rotating speed 18000r/min, feeding amount 300ml/min, obtains agglomerating particles in exit; Particle after reuniting is placed in to vacuum degumming stove, vacuumizes, when vacuum tightness is less than 3Pa, start heating, while being heated to 800 ℃, be incubated 1 hour, be then warming up to 1280 ℃ of sintering, be incubated after cooling to the furnace at 100 ℃ after 2 hours and come out of the stove; By the blank crushing and screening classification after sintering, choose the powder of 15～45 μ m as finished product.Detect and in known powder, contain WC and account for 77%, Ti and account for 14%, cobalt is surplus.In the coating that this powder is prepared after hypersonic flame spraying, without the no cofusing particle being mingled with, coating microhardness is greater than HV1400, and anchoring strength of coating is greater than 70MPa.
Embodiment 2:
With WC (5～8 μ m), TiH
2, cobalt powder is raw material, wherein WC accounts for 85%, TiH
2account for 3%, Co powder and account for 12%; By WC, TiH
2, Co mixing and ball milling, adding appropriate deionized water is wet grinding media, adding the polyvinyl alcohol that accounts for mixed powder gross weight 15% is binding agent, adds proper quantity of defoaming agent etc., ball milling 8 hours; Mixed slurry is inputted to centrifugal atomizing spray drying device, 220 ℃ of inlet temperatures, 130 ℃ of temperature outs, atomizing disk rotating speed 12000r/min, feeding amount 200ml/min, obtains agglomerating particles in exit; Particle after reuniting is placed in to vacuum degumming stove, vacuumizes, when vacuum tightness is less than 3Pa, start heating, while being heated to 800 ℃, be incubated 1 hour, be then warming up to 1180 ℃ of sintering, be incubated after cooling to the furnace at 100 ℃ after 3 hours and come out of the stove; By the blank crushing and screening classification after sintering, choose the powder of 10～45 μ m as finished product.Detect and in known powder, contain WC and account for 84%, Ti and account for 2.5%, cobalt is surplus.In the coating that this powder is prepared after hypersonic flame spraying, without the no cofusing particle being mingled with, coating microhardness is greater than HV1600, and anchoring strength of coating is greater than 70MPa.
Embodiment 3:
With WC (2～5 μ m), TiH
2, cobalt powder, chromium powder be raw material, wherein WC accounts for 75%, TiH
2accounting for 11%, Co powder accounts for 10%, Cr powder and accounts for 4%; By WC, TiH
2, Co, Cr mixing and ball milling, adding appropriate deionized water is wet grinding media, adding the polyvinyl alcohol that accounts for mixed powder gross weight 15% is binding agent, adds proper quantity of defoaming agent etc., ball milling 8 hours; Mixed slurry is inputted to centrifugal atomizing spray drying device, 220 ℃ of inlet temperatures, 130 ℃ of temperature outs, atomizing disk rotating speed 12000r/min, feeding amount 200ml/min, obtains agglomerating particles in exit; Particle after reuniting is placed in to vacuum degumming stove, vacuumizes, when vacuum tightness is less than 3Pa, start heating, while being heated to 800 ℃, be incubated 1 hour, be then warming up to 1230 ℃ of sintering, be incubated and after 3 hours, cool to 100 with the furnace and (after 2 times, come out of the stove; By the blank crushing and screening classification after sintering, choose the powder of 10～45 μ m as finished product.Detect and in known powder, contain WC and account for 75%, Ti and account for 10.5%, cobalt is 11%, and surplus is chromium.In the coating that this powder is prepared after hypersonic flame spraying, without the no cofusing particle being mingled with, coating microhardness is greater than HV1500, and anchoring strength of coating is greater than 70MPa.
The technical scheme that adopts this embodiment to provide, the powder particle fusing effect of preparation is better, anchoring strength of coating is higher, wear resistance is better, and the coating hardness of preparation is higher, toughness is better.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a tungsten carbide-base abrasion-resistant coating material for high rigidity, is characterized in that, comprises the elemental metals Ti of WC, the 2～15wt% of 75～88wt%, and surplus is metal Ni or Co or NiCo alloy.
2. a preparation method for high-hardness tungsten carbide base abrasion-resistant coating material, is characterized in that, comprising:
With the WC of 75～88wt%, the TiH of 2～15wt%
2with metallic binding phase powder be raw material;
After adding deionized water and the defoamer of predetermined amount and account for the caking agent of described raw material gross weight 2～15% in described raw material, carry out mixing and ball milling, make mixed slurry;
After described mixed slurry is dried through spraying, make agglomerating particles, more described agglomerating particles is made to described tungsten carbide-base abrasion-resistant coating material after oversintering and fragmentation.
3. preparation method according to claim 2, is characterized in that, WC and TiH
2wt% summation be no more than 90%.
4. preparation method according to claim 2, is characterized in that, described metallic binding phase powder is the mixture of cobalt powder, nickel powder or cobalt powder and chromium powder.
5. preparation method according to claim 2, is characterized in that, described caking agent is polyvinyl alcohol.
6. preparation method according to claim 2, is characterized in that, the time of described ball milling is at least 4 hours.
7. preparation method according to claim 2, it is characterized in that, the dry centrifugal atomizing spray drying device that adopts of described spraying, in spray-drying process, the temperature as early as possible of described centrifugal atomizing spray drying device is 180～280 ℃, temperature out is 100～190 ℃, and atomizing disk rotating speed is 5000～20000r/min, and feeding amount is 100～400ml/min.
8. preparation method according to claim 2, is characterized in that, described sintering is included in 800 ℃ of insulations at least 1 hour, and sintering under 1150～1300 ℃ of conditions is then incubated after cooling to the furnace at 100 ℃ after 2 hours and comes out of the stove.
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|---|---|---|---|
| CN201410008720.2A CN103725945B (en) | 2014-01-08 | 2014-01-08 | A kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof |
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|---|---|---|---|
| CN201410008720.2A CN103725945B (en) | 2014-01-08 | 2014-01-08 | A kind of high-hardness tungsten carbide base abrasion-resistant coating material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103725945B CN103725945B (en) | 2016-08-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105316617A (en) * | 2015-12-01 | 2016-02-10 | 北京矿冶研究总院 | Preparation method of micro-nano structure tungsten carbide coating |
| 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 |
| 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 |
| CN111185591A (en) * | 2020-02-18 | 2020-05-22 | 北京科技大学广州新材料研究院 | TiC high manganese steel composite material and preparation method thereof |
| CN111826570A (en) * | 2020-07-23 | 2020-10-27 | 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 |
| CN114570924A (en) * | 2022-04-29 | 2022-06-03 | 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105316617A (en) * | 2015-12-01 | 2016-02-10 | 北京矿冶研究总院 | Preparation method of micro-nano structure tungsten carbide coating |
| 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 |
| 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 |
| CN111185591A (en) * | 2020-02-18 | 2020-05-22 | 北京科技大学广州新材料研究院 | TiC high manganese steel composite material 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 |
| CN111826570A (en) * | 2020-07-23 | 2020-10-27 | 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 |
| CN114570924A (en) * | 2022-04-29 | 2022-06-03 | 矿冶科技集团有限公司 | Binder, 5-15 micron tungsten 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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| Publication number | Publication date |
|---|---|
| CN103725945B (en) | 2016-08-24 |
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