CN104388876B - A kind of WC-HfO2nano coating and preparation method thereof - Google Patents
A kind of WC-HfO2nano coating and preparation method thereof Download PDFInfo
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- CN104388876B CN104388876B CN201410603926.XA CN201410603926A CN104388876B CN 104388876 B CN104388876 B CN 104388876B CN 201410603926 A CN201410603926 A CN 201410603926A CN 104388876 B CN104388876 B CN 104388876B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000000576 coating method Methods 0.000 title abstract description 20
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002103 nanocoating Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 11
- 239000011573 trace mineral Substances 0.000 claims abstract description 11
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 229910004140 HfO Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000003213 activating Effects 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000002077 nanosphere Substances 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000007750 plasma spraying Methods 0.000 description 4
- 238000005296 abrasive Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N N#B Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- -1 structure Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The present invention relates to a kind of WC HfO2Nano coating and preparation method thereof, the mass percent of its component and each component be WC account for 19.31% 37.47%, HfO2Account for 61.26% 79.42%, trace element accounts for 1.27%, and described trace element includes Ni, Cr, Si, B, Mo, and its preparation method is: first use dry type comminuting method to prepare WC and HfO2Nanosphere, then use activating agent Protection Code mixing Ni, Cr, Si, B, Mo prepare nanometer powder, afterwards use plasma spray coating process on 9Cr18 mould steel matrix, prepare WC HfO2Nano coating.HfO of the present invention2Content is higher, so anchoring strength of coating, grasping force are higher, is better than conventional washcoat material, and hardness is high, wearability is good, solves the problem that existing coating abrasion performance is poor, corrosion resistance is relatively low, improves the microstructure of material surface coating, structure.
Description
Technical field
The present invention relates to technical field of hot, a kind of WC-HfO2Nano coating and preparation method thereof.
Background technology
Plasma spraying technology is the accurate spraying method of a kind of new multi-purpose greatly developed after flame-spraying, and it has: 1, superhigh temperature characteristic, it is simple to carry out the spraying of materials with high melting point；2, the speed of jet particle is high, and coating is fine and close, and adhesion strength is high；3, owing to use noble gas is as working gas, so sprayed on material is the most oxidizable.
Along with popularizing of plasma spraying technology, increasing workpiece begins to use plasma spraying recovery technique " to come back to life ", but the material kind of workpiece is different, use condition different, and the spraying method and the sprayed on material that are used during reparation are the most different.
Generally there is, for existing coating, the problem that wearability is poor, corrosion resistance is relatively low, people need one can coordinate re-manufacturing technology, for improving the microstructure of material surface coating, structure, improve the new material of coating hardness.
Summary of the invention
For above-mentioned technical problem, the present invention provides a kind of WC-HfO2Nano coating and preparation method thereof.
The technical problem to be solved realizes by the following technical solutions:
A kind of WC-HfO2Nano coating, the mass percent of its component and each component is that WC accounts for 19.31%-37.47%, HfO2Account for 61.26%-79.42%, trace element accounts for 1.27%, and described trace element includes that Ni, Cr, Si, B, Mo, WC are the second hard materials being only second to diamond, there is good physics, chemical property, elastic modelling quantity is close with diamond, and heat stability is higher than diamond, HfO2Can improve intensity and the toughness nearly 50% of material, some rare earth elements added can improve the conjugation of coating, grasping force.
A kind of WC-HfO2The preparation method of nano coating, comprises the following steps: first use dry type comminuting method to prepare WC and HfO2Nanosphere, then use activating agent Protection Code mixing Ni, Cr, Si, B, Mo prepare nanometer powder, afterwards use plasma spray coating process on 9Cr18 mould steel matrix, prepare WC-HfO2Nano coating.
The invention has the beneficial effects as follows: the HfO of the present invention2Content is higher, so anchoring strength of coating, grasping force is higher, it is better than conventional washcoat material, hardness is high, wearability is good, solve existing coating abrasion performance poor, the problem that corrosion resistance is relatively low, improve the microstructure of material surface coating, structure, coating hardness is made to improve 50%, elastic modelling quantity improves 8.5%-14.4%, thus it is integrally improved the anti-wear performance of material surface, the most also the comprehensive mechanical property improving the property improved there is obvious action, it is applicable to plasma spraying, available spraying steel have: 2Cr13, 4Cr13, 9Cr18, 4Cr5W2VSi, 8Cr3 etc..
Detailed description of the invention
In order to make technological means that the present invention realizes and creation characteristic be easy to understand, below the present invention is expanded on further.
Embodiment one:
A kind of WC-HfO2Nano coating, the mass percent of its component and each component be WC account for 19.31%, HfO2Account for 79.42%, trace element accounts for 1.27%, and described trace element includes Ni, Cr, Si, B, Mo.
A kind of WC-HfO2The preparation method of nano coating, comprises the following steps: first use dry type comminuting method to prepare WC and HfO2Nanosphere, then use activating agent Protection Code mixing Ni, Cr, Si, B, Mo prepare nanometer powder, afterwards use plasma spray coating process on 9Cr18 mould steel matrix, prepare WC-HfO2Nano coating.
Described WC-HfO2The workpiece of nano coating is shown in Table 1 with the performance comparison experimental result of 20Cr round steel matrix.
Described WC-HfO2The friction and wear behavior experimental result of the workpiece of nano coating is shown in Table 2 with the friction and wear behavior experimental result contrast of 20Cr round steel matrix.
Embodiment two:
A kind of WC-HfO2Nano coating, the mass percent of its component and each component be WC account for 37.47%, HfO2Account for 61.26%, trace element accounts for 1.27%, and described trace element includes Ni, Cr, Si, B, Mo.
A kind of WC-HfO2The preparation method of nano coating, with embodiment one.
Described WC-HfO2The workpiece of nano coating is shown in Table 1 with the performance comparison experimental result of 20Cr round steel matrix.
Described WC-HfO2The friction and wear behavior experimental result of the workpiece of nano coating is shown in Table 2 with the friction and wear behavior experimental result contrast of 20Cr round steel matrix.
Embodiment three:
A kind of WC-HfO2Nano coating, the mass percent of its component and each component be WC account for 28.53%, HfO2Account for 70.2%, trace element accounts for 1.27%, and described trace element includes Ni, Cr, Si, B, Mo.
A kind of WC-HfO2The preparation method of nano coating, with embodiment one.
Described WC-HfO2The workpiece of nano coating is shown in Table 1 with the performance comparison experimental result of 20Cr round steel matrix.
Described WC-HfO2The friction and wear behavior experimental result of the workpiece of nano coating is shown in Table 2 with the friction and wear behavior experimental result contrast of 20Cr round steel matrix.
Described nano coating can use plasma spray coating process to prepare WC-HfO2 nano coating on 9Cr18 mould steel matrix.
Test the bond strength of coating, microhardness, the porosity and abrasive wear resistance, and utilize XRD that dusty spray Ji coating has been carried out Phase Structure Analysis, being observed the coating morphology before and after dusty spray, abrasive wear by scanning electron microscope, main experimental results and conclusion are as follows:
The workpiece of table 1 WC-HfO2 nano coating and the performance comparison experimental result of 20Cr round steel matrix:
Can be obtained by experimental data, WC-HfO2Nano coating can effectively reduce the porosity of surface of the work, improves the bond strength of surface of the work, can significantly improve the microhardness of surface of the work.
WC-HfO in each embodiment of table 22The friction and wear behavior experimental result of nano coating:
| Group | Before test (g) | After test (g) | Loss (mg) |
| Embodiment one | 49.6246 | 49.6237 | 0.9 |
| Embodiment two | 49.8356 | 49.8346 | 1.0 |
| Embodiment three | 49.8545 | 49.8533 | 1.2 |
| Matched group | 49.4578 | 49.4456 | 12.2 |
From table 2, WC-HfO2Nano coating has excellent wearability.
Result shows: described WC-HfO2The relative density of nano coating, up to 95.4%, does not has obvious gap, WC-HfO between disperse cubic boron nitride particle and ultra-fine cemented carbide matrix2The bending strength of nano coating is 823MPa, and hardness ranges up to HRC68, and density is up to 3.13g/cm3, coating thickness is up to 5 millimeters, and consistency is well 0.82, and at identical conditions, the wear extent of 12CrNi3A is WC-HfO210 times of coating, this shows WC-HfO prepared by plasma2Coating has the abrasive wear resistance of excellence.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the principle of the simply present invention described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (1)
1. a WC-HfO2The preparation method of nano coating, it is characterised in that: the group that described nano coating includes
Divide and the mass percent of each component is that WC accounts for 19.31%-37.47%, HfO2Account for 61.26%-79.42%, trace unit
Element accounts for 1.27%, and described trace element includes that Ni, Cr, Si, B, Mo, described preparation method are first to use to do
Formula comminuting method prepares WC and HfO2Nanosphere, then use activating agent Protection Code mix Ni, Cr, Si, B, Mo
Prepare nanometer powder, use plasma spray coating process to prepare WC-HfO on mould steel matrix afterwards2Nano coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410603926.XA CN104388876B (en) | 2014-10-30 | A kind of WC-HfO2nano coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410603926.XA CN104388876B (en) | 2014-10-30 | A kind of WC-HfO2nano coating and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104388876A CN104388876A (en) | 2015-03-04 |
| CN104388876B true CN104388876B (en) | 2017-01-04 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334759A (en) * | 1999-01-06 | 2002-02-06 | 塞拉麦特复合材料有限公司 | Metal-ceramic laminar-band composite |
| CN101787528A (en) * | 2010-02-09 | 2010-07-28 | 江苏大学 | Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334759A (en) * | 1999-01-06 | 2002-02-06 | 塞拉麦特复合材料有限公司 | Metal-ceramic laminar-band composite |
| CN101787528A (en) * | 2010-02-09 | 2010-07-28 | 江苏大学 | Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect |
Non-Patent Citations (1)
| Title |
|---|
| 激光表面熔覆制备纳米结构涂层的研究进展;王东生等;《中国激光》;20081130;第35卷(第11期);第1698-1709页 * |
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