CN106498336A - A kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof - Google Patents
A kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof Download PDFInfo
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- CN106498336A CN106498336A CN201611027938.8A CN201611027938A CN106498336A CN 106498336 A CN106498336 A CN 106498336A CN 201611027938 A CN201611027938 A CN 201611027938A CN 106498336 A CN106498336 A CN 106498336A
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- magnesium alloy
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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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- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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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- 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 kind of wear resistant corrosion resistant magnesium alloy, which includes the NiCrBSi bond coatings for being attached to Mg alloy surface, and the Al being attached on the NiCrBSi bond coatings2O3/ WC ceramic coatings, wherein NiCrBSi bond coatings thickness are 150 200 μm, Al2O3/ WC thickness of ceramic coating is 350 700 μm.The magnesium alloy that the preparation method of the present invention is prepared, its hardness are high, wear-resisting and corrosion-resistant, excellent performance.
Description
Technical field
The present invention relates to field of material technology, more particularly to a kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof.
Background technology
As magnesium alloy has specific strength, specific stiffness high, heat 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
It is worth 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
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 protective 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, 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 which and wears no resistance.These all become restriction
The key issue of magnesium alloy application.
Content of the invention
It is an object of the invention to a kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof is proposed, can be in Mg alloy surface
Prepared bond strength is high, the good coating of anti-corrosion, wearability.Can minimize cost again simultaneously, reduce the pollution to environment.
It is that the present invention is employed the following technical solutions up to this purpose：
A kind of wear resistant corrosion resistant magnesium alloy, it include the NiCrBSi bond coatings for being attached to Mg alloy surface, and attachment
Al on the NiCrBSi bond coatings2O3/ WC ceramic coatings, wherein NiCrBSi bond coatings thickness are 150-200 μm,
Al2O3/ WC thickness of ceramic coating is 350-700 μm.
The present invention also provides the preparation method of the wear resistant corrosion resistant magnesium alloy, and methods described includes：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by roughening after magnesium alloy substrate compressed air spraying, washing with acetone simultaneously dries；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance be 100mm～
150mm, spray angle are that powder feeding throughput is 0.6～0.8m between 60 °～90 °3/ h, coating layer thickness are 150-200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3/ WC ceramic coatings, spray distance be 100mm～
150mm, plasma flame flow axis and is sprayed-on the angle of specimen surface and is no less than 45 °, spray angle between 45 °～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, which 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, between its each composition, ratio does not do specific restriction, 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 Al2O3In/WC ceramic coatings, Al2O3With the ratio of WC, be equally each composition in effective dose scope,
Such as Al2O3:WC mol ratios are 7-3:1.
Preferably, magnesium alloy substrate was heated to 80- before magnesium alloy matrix surface sandblasting roughening treatment by the present invention
100℃.Matrix material is suitably preheated before spraying, the moisture and dampness of specimen surface can be eliminated, improved spraying particle
With interface temperature during substrate contact, apply caused by reducing the stress caused because of the thermal dilation difference of matrix material and coating material
Layer cracking, so that 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.Increase bond strength and improve the antioxygenic property of coating.
The NiCrBSi alloys for being used as bond coating form one layer of fine and close oxide-film in alloy surface, prevent interface oxygen former
, by oxide-film to internal diffusion, and oxide-film being capable of intactly covering alloy surface for son.Plasma spraying ceramic coat is again
Play good covering protection effect to bottom, further increase the corrosion resisting property of alloy.
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.After 24h, result is as follows, 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, is not affected by substantially corroding.
The magnesium alloy that the preparation method of the present invention is prepared, its hardness are 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 roughening after magnesium alloy substrate compressed air spraying, washing with acetone simultaneously dries；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance is 100mm, spray
It is that powder feeding throughput is 0.6m between 60 ° to apply angle3/ h, coating layer thickness are 150 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3/ WC ceramic coatings, spray distance are 100mm, wait from
Sub- flame stream axis is no less than 45 ° with the angle for being sprayed-on specimen surface, and at 45 °, powder feeding throughput is 0.6m to spray angle3/
H, coating layer thickness are 350 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including being attached to the NiCrBSi bond coatings of Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3/ WC ceramic coatings.
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 roughening after magnesium alloy substrate compressed air spraying, washing with acetone simultaneously dries；
(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 are 200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3/ WC ceramic coatings, spray distance are 150mm, wait from
Sub- flame stream axis is no less than 45 ° with the angle for being sprayed-on specimen surface, and at 90 °, powder feeding throughput is 0.8m to spray angle3/
H, coating layer thickness are 700 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including being attached to the NiCrBSi bond coatings of Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3/ WC ceramic coatings.
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 roughening after magnesium alloy substrate compressed air spraying, washing with acetone simultaneously dries；
(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 are 170 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3/ WC ceramic coatings, spray distance are 170mm, wait from
Sub- flame stream axis is no less than 45 ° with the angle for being sprayed-on specimen surface, and at 60 °, powder feeding throughput is 0.7m to spray angle3/
H, coating layer thickness are 500 μm.
The wear resistant corrosion resistant magnesium alloy that methods described is obtained, including being attached to the NiCrBSi bond coatings of Mg alloy surface,
And the Al being attached on the NiCrBSi bond coatings2O3/ WC ceramic coatings.
Claims (3)
1. a kind of wear resistant corrosion resistant magnesium alloy, which includes the NiCrBSi bond coatings for being attached to Mg alloy surface, and is attached to
Al on the NiCrBSi bond coatings2O3/ WC ceramic coatings, wherein NiCrBSi bond coatings thickness are 150-200 μm,
Al2O3/ WC thickness of ceramic coating is 350-700 μm.
2. the preparation method of wear resistant corrosion resistant magnesium alloy as claimed in claim 1, methods described include：
(1) magnesium alloy matrix surface sandblasting is roughened；
(2) by roughening after magnesium alloy substrate compressed air spraying, washing with acetone simultaneously dries；
(3) in dry magnesium alloy matrix surface flame-spraying NiCrBSi bond coatings, spray distance be 100mm～
150mm, spray angle are that powder feeding throughput is 0.6～0.8m between 60 °～90 °3/ h, coating layer thickness are 150-200 μm；
(4) Al is sprayed in NiCrBSi bond coatings upper plasma2O3/ WC ceramic coatings, spray distance are 100mm～150mm, etc.
Ion flame stream axis and be sprayed-on the angle of specimen surface and be no less than 45 °, spray angle between 45 °～90 °, powder feeding air-flow
Measure as 0.6～0.8m3/h, coating layer thickness is 350-700 μm.
3. preparation method as claimed in claim 2, it is characterised in that before magnesium alloy matrix surface sandblasting roughening treatment,
Magnesium alloy substrate is heated to 80-100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027938.8A CN106498336A (en) | 2016-11-18 | 2016-11-18 | A kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027938.8A CN106498336A (en) | 2016-11-18 | 2016-11-18 | A kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106498336A true CN106498336A (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611027938.8A Pending CN106498336A (en) | 2016-11-18 | 2016-11-18 | A kind of wear resistant corrosion resistant magnesium alloy and preparation method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255365A (en) * | 2013-05-22 | 2013-08-21 | 北京工业大学 | Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating |
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- 2016-11-18 CN CN201611027938.8A patent/CN106498336A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255365A (en) * | 2013-05-22 | 2013-08-21 | 北京工业大学 | Corrosion and wear resistant coating for magnesium alloy surface and preparation method of corrosion and wear resistant coating |
Non-Patent Citations (1)
| Title |
|---|
| 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》 * |
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