CN107699841A - A kind of preparation method of wear-resisting WC coatings - Google Patents
A kind of preparation method of wear-resisting WC coatings Download PDFInfo
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- CN107699841A CN107699841A CN201710772688.9A CN201710772688A CN107699841A CN 107699841 A CN107699841 A CN 107699841A CN 201710772688 A CN201710772688 A CN 201710772688A CN 107699841 A CN107699841 A CN 107699841A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
Abstract
The present invention discloses a kind of preparation method of wear-resisting WC coatings, is related to wear-resistant coating technical field.Including following preparation process：（1）Commercialized WC 10wt.%Co powder is passed through into screening process, it is respectively 20 50 μm, 5 20 μm of two kinds of WC alloy powders to obtain particle diameter；（2）By step（1）Obtained particle size range carries out ball-milling treatment in 5 20 μm of WC alloy powders, and the WC powder particle diameter obtained after ball milling is 300 500nm；（3）By step（1）And step（2）The WC powder of two kinds of obtained different-grain diameters is according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；（4）With by step（3）Obtained hybrid alloys powder is raw material, and matrix surface is sprayed using supersonic velocity flame plating equipment, produces composite coating.The present invention provides and is mixed the WC alloy powders of different-grain diameter according to certain ratio, obtains coating by the method for HVAF, due to the presence of the nanometer powder of rational proportion, the coating is had higher anti-wear performance.
Description
Technical field
The present invention relates to wear-resistant coating technical field, more particularly to a kind of preparation method of wear-resisting WC coatings.
Background technology
WC coatings have good Abrasive Resistance of Stubble-cleaning, and this coating has important for raising parts service life
Effect, therefore wear-resistant coating containing WC applies most coating forms in fields such as mine, coal, metallurgy.
However, the anti-wear performance of single WC coatings is not highly desirable, at present, mostly using addition Fe based powders, Ni
The materials such as based powders, ceramic powders are to form the method for composite coating to improve its anti-wear performance, due to introducing in these methods
Second phase will necessarily produce the problem of adhesion between WC powder and the second phase is weaker, finally can also cause WC wear-resistant coatings
Service life cannot increase substantially.
It is 201310444447.3 that State Patent Office disclosed a number of patent application on the 25th in September in 2013, entitled
Iron based metallic glass composite coating of WC-CO enhancings and preparation method thereof.This patent disclose following technical scheme：By by body
The WC-Co powder of fraction 10%~30% and the Fe amorphous powders of volume fraction 70~90% are uniformly mixed as sprayed on material,
The glassy metal coating that the hard alloy prepared using HVAF technique on piece surface is strengthened.With current Fe
Base amorphous coating is compared, and its hardness, intensity and wearability increase.Compared with WC-Co coatings prepared by same procedure, property
Can be close, cost can but reduce a lot.But this patent can not by the alloy powder of two kinds of different-grain diameters completely it is embedding and, lead
Cause Fe based powders and WC powder adhesion weaker, eventually the service life of WC wear-resistant coatings cannot be increased substantially.
（The patent and the relation of this case seem little）.
The content of the invention
The problem to be solved in the present invention is to provide a kind of preparation method of single WC wear-resistant coatings, and the WC of different-grain diameter is closed
Bronze end is mixed according to certain ratio, coating is made by the method for HVAF, the coating is compared to same
Coating made from particle diameter WC powder has higher anti-wear performance.Therefore, now propose following technical scheme：
A kind of preparation method of wear-resisting WC coatings, comprises the following steps：
（1）Commercialized WC-10wt.%Co alloy powders are subjected to screening process, it is respectively 20-50 μm, 5-20 μm to obtain particle diameter
Two kinds of WC alloy powders；
（2）By step（1）The WC alloy powders that obtained particle diameter is 5-20 μm carry out ball-milling treatment, the WC alloy powders after ball milling
Particle diameter is 300-500nm；
（3）By step（1）In particle diameter be 20-50 μm WC alloy powders and step（2）Obtain the WC that particle diameter is 300-500nm
Alloy powder is according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；
（4）Corrosion derusting, sandblasting roughening treatment are first carried out to matrix surface, and matrix is preheated；Then with step（3）System
The hybrid alloys powder obtained is raw material, and matrix surface is sprayed using supersonic velocity flame plating equipment, after end to be sprayed,
Natural cooling, that is, obtain WC coatings.
Further improvement of these options, in step（2）In, when WC alloy powders are carried out into ball-milling treatment, abrading-ball is
Hard alloy, ratio of grinding media to material is 50 during ball milling:1, Ball-milling Time is 2 hours, using argon gas as protective gas in mechanical milling process.
Further improvement of these options, in step（4）In, the spraying coating process ginseng of the supersonic velocity flame plating equipment
Number is oxygen pressure 0.5-0.6 MPa；Oxygen flow is 160-200L/min；Propane pressure 0.4-0.6MPa；Propane flow 20-
25 L/min；Spray distance 220-260 mm；Powder feed rate 4-6 rpm.
Further improvement of these options, the spraying parameter of the supersonic velocity flame plating equipment is oxygen pressure
0.53 MPa；Oxygen flow is 180 L/min；Propane pressure 0.45MPa；The L/min of propane flow 22；The mm of spray distance 250；
The rpm of powder feed rate 5.
Further improvement of these options, the model JP-5000 of the supersonic spray coating equipment.
Compared with prior art, the beneficial effects of the present invention are：
（1）Alloy powder is carried out ball-milling treatment so that obtained after ball milling by the present invention before being sprayed to matrix surface
WC powder particle diameter is about 300-500nm, and due to the presence of nanoscale WC alloy powders, the WC alloy powders of the particle size range are rear
There can be the process of part fusing in continuous thermal spray process, the powder of fusing is advantageous to improve micron order WC alloy powder particles
With the bond strength between nanoscale WC alloy powder particles, so that the WC coating porosities obtained are relatively low, can solve
Needed in traditional WC coatings preparation process by other materials it is compound the problem of.
（2）During coating duty, the presence of nano-scale particle can play obstruction or delay crackle the present invention
The process of extension, so as to improve the quality of whole coating, and the WC coatings that the present invention prepares, there is good wearability
Can, service life is greatly improved than traditional WC wear-resistant coatings.
（3）The WC alloy powders that the present invention is 300-500nm by the WC alloy powders and particle diameter that are 20-50 μm by particle diameter
Mix and be sprayed on matrix surface, in spraying process, on the one hand, nanoscale WC alloy powders can have the process of part fusing, melt
The powder of change plays a part of " bonding agent ", is advantageous to improve micron order WC alloy powder particles and nanoscale WC alloy powders
Bond strength between grain, on the other hand, it unfused powder, can be filled in the gap of micron order WC powder, be advantageous to drop
Low coating porosity, the flatness of composite coating is improved, make the composite coating for being sprayed on matrix surface more attractive in appearance.
Embodiment
To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, with reference to
Embodiment, the present invention is expanded on further.
Embodiment 1
A kind of preparation method of wear-resisting WC coatings, comprises the following steps：
（1）Commercialized WC-10wt.%Co alloy powders are subjected to screening process, it is respectively 35 μm to obtain particle diameter, and the two of 15 μm
Kind WC alloy powders；
（2）By step（1）The WC alloy powders that obtained particle diameter is 15 μm carry out ball-milling treatment, the WC alloyed powders obtained after ball milling
Last particle diameter is 400nm；
（3）By step（1）In particle diameter be 35 μm WC alloy powders and step（2）Obtain the WC alloyed powders that particle diameter is 400nm
End is according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；
（4）Corrosion derusting, sandblasting roughening treatment are first carried out to matrix surface, and matrix is preheated；Then with step（3）System
The hybrid alloys powder obtained is raw material, and matrix surface is sprayed using model JP-5000 supersonic velocity flame plating equipment
Apply, spraying parameter is preferably the MPa of oxygen pressure 0.53；Oxygen flow is 180 L/min；Propane pressure 0.45MPa；Third
The L/min of alkane flow 22；The mm of spray distance 250；The rpm of powder feed rate 5, after end to be sprayed, natural cooling, that is, obtain WC paintings
Layer.
Embodiment 2
A kind of preparation method of wear-resisting WC coatings, comprises the following steps：
（1）Commercialized WC-10wt.%Co alloy powders are subjected to screening process, it is respectively 20 μm, two kinds of 5 μm to obtain particle diameter
WC alloy powders；
（2）By step（1）The WC alloy powders that obtained particle diameter is 5 μm carry out ball-milling treatment, the WC alloyed powders obtained after ball milling
Last particle diameter is 300nm；
（3）By step（1）In particle diameter be 20 μm WC alloy powders and step（2）Obtain the WC alloyed powders that particle diameter is 300nm
End is according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；
（4）Corrosion derusting, sandblasting roughening treatment are first carried out to matrix surface, and matrix is preheated；Then with step（3）System
The hybrid alloys powder obtained is raw material, and matrix surface is sprayed using model JP-5000 supersonic velocity flame plating equipment
Apply, spraying parameter is oxygen pressure 0.5MPa；Oxygen flow is 160L/min；Propane pressure 0.4MPa；Propane flow
20L/min；Spray distance 220mm；Powder feed rate 4rpm, after end to be sprayed, natural cooling, that is, obtain WC coatings.
Embodiment 3
A kind of preparation method of wear-resisting WC coatings, comprises the following steps：
（1）Commercialized WC-10wt.%Co alloy powders are subjected to screening process, obtain particle diameter be respectively 50 μm, the two of 20 μm
Kind WC alloy powders；
（2）By step（1）Obtain the WC alloy powders that particle diameter is 20 μm and carry out ball-milling treatment, the WC alloy powders obtained after ball milling
Particle diameter is 500nm；
（3）By step（1）In particle diameter be 50 μm WC alloy powders and step（2）Obtain the WC alloyed powders that particle diameter is 500nm
End is according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；
（4）Corrosion derusting, sandblasting roughening treatment are first carried out to matrix surface, and matrix is preheated；Then with step（3）System
The hybrid alloys powder obtained is raw material, and matrix surface is sprayed using model JP-5000 supersonic velocity flame plating equipment
Apply, spraying parameter is the MPa of oxygen pressure 0.6；Oxygen flow is 200L/min；Propane pressure 0.6MPa；Propane flow 25
L/min；The mm of spray distance 260；The rpm of powder feed rate 6, after end to be sprayed, natural cooling, that is, obtain WC coatings.
（4）In above three embodiment, embodiment 1 is most preferred embodiment.The present invention is carrying out spraying it to matrix surface
Before, alloy powder is subjected to ball-milling treatment so that the WC powder particle diameter obtained after ball milling is about 300-500nm, due to nanoscale
The presence of WC alloy powders, the WC alloy powders of the particle size range can have the mistake of part fusing in follow-up thermal spray process
Journey, the combination that the powder of fusing is advantageous to improve between micron order WC alloy powder particles and nanoscale WC alloy powder particles are strong
Degree, so that the coating porosity obtained is relatively low, can solve to need to pass through other materials in traditional WC coatings preparation process
The problem of compound.During coating duty, the presence of nano-scale particle can play obstruction or delay the present invention in addition
The process of Crack Extension, so as to improve the quality of whole coating, and the WC coatings that the present invention prepares, there is well resistance to
Performance is ground, service life is greatly improved than traditional WC wear-resistant coatings.The present invention is by the way that the WC that particle diameter is 20-50 μm is closed
Bronze end and particle diameter are sprayed on matrix surface for the WC alloy powders mixing of 300-500 nanometers, can reduce coating porosity, improve
The flatness of composite coating, make the composite coating for being sprayed on matrix surface more attractive in appearance.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all fall in scope of the presently claimed invention.
Claims (5)
1. a kind of preparation method of wear-resisting WC coatings, it is characterised in that comprise the following steps：
（1）Commercialized WC-10wt.%Co alloy powders are subjected to screening process, it is respectively 20-50 μm, 5-20 μm to obtain particle diameter
Two kinds of WC alloy powders；
（2）By step（1）The WC alloy powders that obtained particle diameter is 5-20 μm carry out ball-milling treatment, the WC alloys obtained after ball milling
Powder diameter is 0.3-0.5 μm；
（3）By step（1）WC alloy powders and the step that obtained particle diameter is 20-50 μm（2）It is 0.3-0.5 μm to obtain particle diameter
WC alloy powders are according to mass percent 9:1 carries out ball milling mixing, obtains hybrid alloys powder；
（4）Corrosion derusting, sandblasting roughening treatment are first carried out to matrix surface, and matrix is preheated；Then with step（3）System
The hybrid alloys powder obtained is raw material, and matrix surface is sprayed using supersonic velocity flame plating equipment, after end to be sprayed,
Natural cooling, that is, obtain WC coatings.
A kind of 2. preparation method of wear-resisting WC coatings according to claim 1, it is characterised in that：In step（2）In, by WC
When alloy powder carries out ball-milling treatment, abrading-ball is hard alloy, and ratio of grinding media to material is 50 during ball milling:1, Ball-milling Time is 2 hours, ball milling
During using argon gas as protective gas.
A kind of 3. preparation method of wear-resisting WC coatings according to claim 1, it is characterised in that：In step（4）In, it is described
The spraying parameter of supersonic velocity flame plating equipment is oxygen pressure 0.5-0.6 MPa；Oxygen flow is 160-200L/min；
Propane pressure 0.4-0.6MPa；Propane flow 20-25 L/min；Spray distance 220-260 mm；Powder feed rate 4-6 rpm.
A kind of 4. preparation method of wear-resisting WC coatings according to claim 3, it is characterised in that：The supersonic flame spray
The spraying parameter of automatic doubler surface glouer is the MPa of oxygen pressure 0.53；Oxygen flow is 180 L/min；Propane pressure 0.45MPa；Third
The L/min of alkane flow 22；The mm of spray distance 250；The rpm of powder feed rate 5.
A kind of 5. preparation method of wear-resisting WC coatings according to claim 1, it is characterised in that：The supersonic spray coating is set
Standby model JP-5000.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710203585 | 2017-03-30 | ||
| CN2017102035850 | 2017-03-30 |
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| CN107699841A true CN107699841A (en) | 2018-02-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108642430A (en) * | 2018-05-16 | 2018-10-12 | 安徽三环水泵有限责任公司 | A kind of process of surface treatment of slush pump pump shaft |
| CN112251704A (en) * | 2020-10-05 | 2021-01-22 | 宝克(中国)测试设备有限公司 | Manufacturing process of hub with composite coating |
| CN115161585A (en) * | 2022-07-29 | 2022-10-11 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039849A (en) * | 1988-06-02 | 1990-02-21 | 帕金-埃尔默有限公司 | The wolfram varbide that is used for flame plating |
| CN103276340A (en) * | 2013-06-09 | 2013-09-04 | 天津大学 | Metal ceramic coating provided with multi-scale WC (wolfram carbide) crystal grains and preparation method |
| CN104862571A (en) * | 2015-06-16 | 2015-08-26 | 武汉理工大学 | Multi-scale nanostructured WC-CoCr metal ceramic composite powder |
-
2017
- 2017-08-31 CN CN201710772688.9A patent/CN107699841A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039849A (en) * | 1988-06-02 | 1990-02-21 | 帕金-埃尔默有限公司 | The wolfram varbide that is used for flame plating |
| CN103276340A (en) * | 2013-06-09 | 2013-09-04 | 天津大学 | Metal ceramic coating provided with multi-scale WC (wolfram carbide) crystal grains and preparation method |
| CN104862571A (en) * | 2015-06-16 | 2015-08-26 | 武汉理工大学 | Multi-scale nanostructured WC-CoCr metal ceramic composite powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108642430A (en) * | 2018-05-16 | 2018-10-12 | 安徽三环水泵有限责任公司 | A kind of process of surface treatment of slush pump pump shaft |
| CN112251704A (en) * | 2020-10-05 | 2021-01-22 | 宝克(中国)测试设备有限公司 | Manufacturing process of hub with composite coating |
| CN115161585A (en) * | 2022-07-29 | 2022-10-11 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
| CN115161585B (en) * | 2022-07-29 | 2023-11-14 | 上海交通大学内蒙古研究院 | Preparation method of wear-resistant corrosion-resistant WC-10Co4Cr tungsten flash coating |
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