CN106637032A - Wear-resistant and corrosion-resistant magnesium alloy with gradient coating, and preparation method thereof - Google Patents
Wear-resistant and corrosion-resistant magnesium alloy with gradient coating, and preparation method thereof Download PDFInfo
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- CN106637032A CN106637032A CN201611015214.1A CN201611015214A CN106637032A CN 106637032 A CN106637032 A CN 106637032A CN 201611015214 A CN201611015214 A CN 201611015214A CN 106637032 A CN106637032 A CN 106637032A
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- magnesium alloy
- nicrbsi
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- resistant
- bond coatings
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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
- C23C4/04—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
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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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a wear-resistant and corrosion-resistant magnesium alloy. The wear-resistant and corrosion-resistant magnesium alloy comprises a NiCrBSi bonding coating attached to the surface of the magnesium alloy, and an Al2O3-Mo2FeB2-Si3N4 ceramic coating attached to the NiCrBSi bonding coating, wherein the thickness of the NiCrBSi bonding coating is 150-200[mu]m, and the thickness of the Al2O3-Mo2FeB2-Si3N4 ceramic coating is 350-700[mu]m. The magnesium alloy prepared by the preparation method disclosed by the invention is high in hardness, wear-resistant and corrosion-resistant, and excellent in performance.
Description
Technical field
The present invention relates to field of material technology, more particularly to a kind of wear resistant corrosion resistant gradient coating magnesium alloy and its preparation side
Method.
Background technology
Because magnesium alloy has specific strength, specific stiffness high, thermal conductivity, machinability are good, and electromagnetic shielding capability waits by force special
Point so that magnesium alloy has important application in automobile, electronics, electrical equipment, traffic, space flight, aviation and national defense and military industrial circle
Value and application prospect.
In recent years, magnesium alloy application is improved year by year, but some problems to be resolved cause the application cost of magnesium alloy still
It is very high.Because the chemical property of magnesium is very active, easily with oxygen, nitrogen gas and water, CO2、SO2Consistency is generated etc. reacting
One layer of relatively low non-metallic film of coefficient, this tunic can not play the effect of being effectively protected to metallic matrix.In addition, the standard electric of magnesium
Electrode potential is -2.34eV, is minimum in common metal structural material, when contacting with other metals, galvanic corrosion easily occurs
And accelerate dissolving.Further, the burning-point of magnesium alloy is low, easily burns in fusion process, it is therefore necessary to take safeguard measure, industry
Mainly using saline flux or gas shield in production, the former easily causes foundry goods and is mingled with, and affects product quality, HCl of release etc.
Gaseous contamination environment；Or adopt SF more6Gas, it is harmless, but due to SF6It is the greenhouse gases for making terrestrial climate warm,
Its greenhouse effect is CO223900 times.And the hardness of magnesium conjunction is relatively low, this results in it and wears no resistance.These all become restriction
The key issue of magnesium alloy application.
The content of the invention
It is an object of the invention to propose a kind of wear resistant corrosion resistant gradient coating magnesium alloy, can be obtained in Mg alloy surface
Bond strength is high, the good coating of anti-corrosion, wearability.Can minimize cost again simultaneously, reduce the pollution to environment.
It is that, up to this purpose, the present invention is employed the following technical solutions：
A kind of wear resistant corrosion resistant gradient coating magnesium alloy, it includes being attached to the NiCrBSi bond coatings of Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3-Mo2FeB2-Si3N4Ceramic coating, wherein NiCrBSi bond coatings
Thickness is 150-200 μm, Al2O3-Mo2FeB2-Si3N4Thickness of ceramic coating is 350-700 μm.
The present invention also provides a kind of preparation method of wear resistant corrosion resistant gradient coating magnesium alloy, and methods described includes：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by the magnesium alloy substrate compressed air spraying after roughening, acetone is washed and is dried；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance be 100mm～
150mm, spray angle is that between 60 °～90 °, powder feeding throughput is 0.6～0.8m3/ h, coating layer thickness is 150-200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3-Mo2FeB2-Si3N4Ceramic coating, spray distance is
100mm～150mm, plasma flame flow axis and the angle for being sprayed-on specimen surface are no less than 45 °, spray angle 45 °～
Between 90 °, powder feeding throughput is 0.6～0.8m3/h, and coating layer thickness is 350-700 μm.
Compared to other bond coatings, using NiCrBSi as bond coating, it serves reduction heat treatment to the present invention
Temperature, improve the effect that matrix is connected property with working lining, realize good combination.
NiCrBSi of the present invention, ratio does not do specific restriction between its each composition, as long as each composition reaches effectively
Amount.For example, its content be Cr 14-18wt%, B 3-4.5wt%, Si 3.5-5.5wt%, Ni surpluses.
The Al2O3-Mo2FeB2-Si3N4In ceramic coating, Al2O3-Mo2FeB2-Si3N4Ratio, be equally each composition
In effective dose scope, such as Al2O3-Mo2FeB2-Si3N4Weight ratio is 7-3:0.5-2:1.
Mo2FeB2Due to stable chemical performance, thermal conductivity factor is high, thermal coefficient of expansion is little, anti-wear performance is good, the mixing
Powder coats the inwall of turbine impeller or cylinder block, can improve its wearability and increase the service life 1～2 times.Cause
This present invention is by Mo2FeB2With Al2O3And Si3N4Combination, its not only anti-wear performance it is outstanding, while with extremely strong anticorrosive property
Energy.
Preferably, magnesium alloy substrate was heated to 80- by the present invention before magnesium alloy matrix surface sandblasting roughening treatment
100℃.Matrix material is suitably preheated before spraying, the moisture and moisture of specimen surface can be eliminated, improved spraying particle
With interface temperature during substrate contact, reduce and applied caused by the stress caused because of the thermal dilation difference of matrix material and coating material
Layer cracking, so as to improve the bond strength of coating and matrix.
The present invention is from NiCrBSi alloy powders as gradient ceramic coating intermediate layer.NiCrBSi alloy powders are to use
Temperature is higher, the alloy powder that high-temperature comprehensive property is excellent.The hardness of Cr is high, the Cr of generation2O3Oxide-film can not only prevent gas
Further oxidation to coating, while the wearability of coating can also be strengthened..
The present invention coating microhardness be more than 1020HV, significantly larger than magnesium alloy substrate microhardness (less than
100HV), its anti-wear performance is substantially increased.
Using salt water immersion test, also referred to as immersion corrosion test.Result is as follows after 24h, does not spray sample corrosion acutely, rotten
Erosion is serious, and surface forms a large amount of black point corrosion pits, and it is uneven that surface becomes, and has a large amount of corrosion products to produce.And spray sample
Corrosion is slow, and corrosion is not affected by substantially.
The magnesium alloy that the preparation method of the present invention is prepared, its hardness is high, wear-resisting and corrosion-resistant, excellent performance.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
Wear resistant corrosion resistant magnesium alloy is prepared according to following processing steps：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by the magnesium alloy substrate compressed air spraying after roughening, acetone is washed and is dried；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance is 100mm, spray
It is that between 60 °, powder feeding throughput is 0.6m to apply angle3/ h, coating layer thickness is 150 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3-Mo2FeB2-Si3N4Ceramic coating, spray distance is
100mm, plasma flame flow axis and the angle for being sprayed-on specimen surface are no less than 45 °, spray angle at 45 °, powder feeding air-flow
Measure as 0.6m3/ h, coating layer thickness is 350 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including the NiCrBSi bond coatings for being attached to Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3-Mo2FeB2-Si3N4Ceramic coating.
Embodiment 2
Wear resistant corrosion resistant magnesium alloy is prepared according to following processing steps：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by the magnesium alloy substrate compressed air spraying after roughening, acetone is washed and is dried；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance is 150mm, spray
It is 90 ° to apply angle, and powder feeding throughput is 0.8m3/ h, coating layer thickness is 200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3-Mo2FeB2-Si3N4Ceramic coating, spray distance is
150mm, plasma flame flow axis and the angle for being sprayed-on specimen surface are no less than 45 °, spray angle at 90 °, powder feeding air-flow
Measure as 0.8m3/ h, coating layer thickness is 700 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including the NiCrBSi bond coatings for being attached to Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3-Mo2FeB2-Si3N4Ceramic coating.
Embodiment 3
Wear resistant corrosion resistant magnesium alloy is prepared according to following processing steps：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by the magnesium alloy substrate compressed air spraying after roughening, acetone is washed and is dried；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance is 130mm, spray
It is 70 ° to apply angle, and powder feeding throughput is 0.7m3/ h, coating layer thickness is 170 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3-Mo2FeB2-Si3N4Ceramic coating, spray distance is
170mm, plasma flame flow axis and the angle for being sprayed-on specimen surface are no less than 45 °, spray angle at 60 °, powder feeding air-flow
Measure as 0.7m3/ h, coating layer thickness is 500 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including the NiCrBSi bond coatings for being attached to Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3-Mo2FeB2-Si3N4Ceramic coating.
Claims (4)
1. a kind of wear resistant corrosion resistant gradient coating magnesium alloy, it includes being attached to the NiCrBSi bond coatings of Mg alloy surface, with
And the Al being attached on the NiCrBSi bond coatings2O3-Mo2FeB2-Si3N4Ceramic coating, wherein NiCrBSi bond coatings are thick
Spend for 150-200 μm, Al2O3-Mo2FeB2-Si3N4Thickness of ceramic coating is 350-700 μm.
2. wear resistant corrosion resistant gradient coating magnesium alloy as claimed in claim 1, it is characterised in that the NiCrBSi contents are
Cr 14-18wt%, B 3-4.5wt%, Si 3.5-5.5wt%, Ni surpluses.
3. the preparation method of wear resistant corrosion resistant gradient coating magnesium alloy as claimed in claim 1 or 2, methods described includes：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by the magnesium alloy substrate compressed air spraying after roughening, acetone is washed and is dried；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance be 100mm～
150mm, spray angle is that between 60 °～90 °, powder feeding throughput is 0.6～0.8m3/ h, coating layer thickness is 150-200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3-Mo2FeB2-Si3N4Ceramic coating, spray distance is 100mm
～150mm, plasma flame flow axis and the angle for being sprayed-on specimen surface are no less than 45 °, spray angle 45 °～90 ° it
Between, powder feeding throughput is 0.6～0.8m3/h, and coating layer thickness is 350-700 μm.
4. preparation method as claimed in claim 3, it is characterised in that before magnesium alloy matrix surface sandblasting roughening treatment,
Magnesium alloy substrate is heated into 80-100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015214.1A CN106637032A (en) | 2016-11-18 | 2016-11-18 | Wear-resistant and corrosion-resistant magnesium alloy with gradient coating, and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015214.1A CN106637032A (en) | 2016-11-18 | 2016-11-18 | Wear-resistant and corrosion-resistant magnesium alloy with gradient coating, and preparation method thereof |
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| CN106637032A true CN106637032A (en) | 2017-05-10 |
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| CN201611015214.1A Pending CN106637032A (en) | 2016-11-18 | 2016-11-18 | Wear-resistant and corrosion-resistant magnesium alloy with gradient coating, and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109652753A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| CN109652755A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147565A (en) * | 1996-06-06 | 1997-04-16 | 西安交通大学 | Metal-carbide coating preventing superheater of power station boiler from heat corrosion |
| CN102560316A (en) * | 2011-12-29 | 2012-07-11 | 上海鼓风机厂有限公司 | Process for performing ultrasonic spray of composite coatings on surface of fan blade |
-
2016
- 2016-11-18 CN CN201611015214.1A patent/CN106637032A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147565A (en) * | 1996-06-06 | 1997-04-16 | 西安交通大学 | Metal-carbide coating preventing superheater of power station boiler from heat corrosion |
| CN102560316A (en) * | 2011-12-29 | 2012-07-11 | 上海鼓风机厂有限公司 | Process for performing ultrasonic spray of composite coatings on surface of fan blade |
Non-Patent Citations (2)
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|---|
| 曲文超: "《镁合金、纯铜表面反应热喷涂陶瓷涂层制备工艺及性能研究》", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 李文虎: "《Mo2FeB2金属陶瓷覆层材料组织与性能的研究》", 《陶瓷》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109652753A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
| CN109652755A (en) * | 2019-02-12 | 2019-04-19 | 南昌航空大学 | A kind of preparation method of Mg alloy surface corrosion-inhibiting coating |
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Application publication date: 20170510 |