CN106498334A - A kind of preparation method of WC NiB graded composite wear-resistant coatings - Google Patents
A kind of preparation method of WC NiB graded composite wear-resistant coatings Download PDFInfo
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- CN106498334A CN106498334A CN201611015174.0A CN201611015174A CN106498334A CN 106498334 A CN106498334 A CN 106498334A CN 201611015174 A CN201611015174 A CN 201611015174A CN 106498334 A CN106498334 A CN 106498334A
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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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- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of preparation method of WC NiB graded composite wear-resistant coatings, which includes：(1) substrate surface is carried out sandblasting roughening treatment；(2) wash substrate surface respectively with acetone and ethanol, and dry at 100 160 DEG C；(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones are carried out to the substrate surface, the transition region thickness is 0.1 0.3mm；(4) using air plasma spraying WC NiB mixed-powders on transition zone, WC NiB graded composite wear-resistant coatings are obtained, the graded composite wear-resistant coating thickness is 0.2 0.6mm.The composite coating can improve the anti-wear performance of matrix.
Description
Technical field
A kind of the present invention relates to field of material technology, more particularly to preparation method of WC-NiB graded composites wear-resistant coating.
Background technology
Abrasion is one of three kinds of main causes (abrasion, corrosion and fatigue) of metal parts failure.Economy caused by it
Loss is very huge, the numeral that such as U.S. announces for 1981, and it is beautiful that the loss for being caused due to abrasion every year is up to 100,000,000,000
Unit.Wherein about 20,000,000,000 dollars of material consumption, equivalent to the 7% of material annual production.As material wear ability is poor, China is big
The Loss of Life of amount fundamental parts generally significantly less than the level of external advanced product, therefore directly and indirectly economic loss
And it is very surprising.
Only with regard to metallurgical mine, agricultural machinery, coal, electric power and the incomplete statistics of five industrial departments of building materials, annual merely due to
Abrasive wear and the spare part that requires supplementation with just up to 1,000,000 tons of steel, equivalent to 15～2,000,000,000 RMB.And for example mechanical industry is annual
Steel used, there are about half be consume in the production of spare part, and the major part in spare part be as wear-out life is not high and
Failure, such as from about 40% agricultural machinery and implement spare part is consumed due to abrasive wear, and about 30% seamless steel tube for boiler is due to corrosion mill
Loss effect.
In metallurgical mine production, the operating mode and use environment of machinery is very severe, and wear out failure is the master of mechanical failure
Want reason.By taking slurry pump as an example, it is remaining CHARACTERISTICS OF TAILINGS SAND mud after the washup that extracts, in mud containing part hardness compared with
Washed ore, grit and larger stone, and wherein need when transporting mud in addition also containing corrosive materials such as sulphur
Pressure head that will be higher, therefore in pump, the speed of fluid is very high.There is larger impulsive force.These working conditions determine Pulp pump
Using when to can bear the abrasion of various ways, have very high mechanical tenacity and intensity again, thus to pump flow passage components
Material propose very high requirement.But the performance of homogenous material be difficult to meet this to have a very high mechanical strength, and
Have the capability of doing sth the requirement of mill, corrosion resistant.
Hot-spraying technique and the generation of composite, are to solve this problem to open a piece of new prospect.For example, will be resistance to
Mill ceramic material is sprayed on impact-resistant metal material, and bi-material is learnt from other's strong points to offset one's weaknesses, and is had complementary advantages, can be met machinery and set
The standby mechanical load for increasingly improving and the rigors to abrasion resistance.
Thermal spraying composite anti-wear coating success it is critical only that wearability, but sprayed on material is had with the property of coating
Very big difference, so, selection can only be carried out according to the existing property of sprayed on material, the wearability as wear-resistant coating needs in a large number
Performance test checking.Wear-resistant coating quality is also affected with coating structure by spraying coating process except relevant with sprayed on material,
This is related to the bond strength of coating and residual thermal stress, high bond strength and the final mesh that low residual thermal stress is hot-spraying technique
's.
Content of the invention
It is an object of the invention to proposing a kind of preparation method of graded composite wear-resistant coating, the composite coating can be carried
The anti-wear performance of high matrix.
It is that the present invention is employed the following technical solutions up to this purpose：
A kind of preparation method of WC-NiB graded composites wear-resistant coating, which includes：
(1) substrate surface is carried out sandblasting roughening treatment；
(2) wash substrate surface respectively with acetone and ethanol, and dry at 100-160 DEG C；
(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones, institute are carried out to the substrate surface
Transition region thickness is stated for 0.1-0.3mm；
(4) WC-NiB graded composites are obtained wear-resisting using air plasma spraying WC-NiB mixed-powders on transition zone
Coating, the graded composite wear-resistant coating thickness are 0.2-0.6mm.
WC-NiB mixed-powders of the present invention, which is nanoscale, and the two is with 10-3:1 weight is than mixing.
The NiB powder, Ni:The atomic ratio of B is 5-2:1.
The air plasma spraying equipment of the present invention, is the known technology of this area, and the determination of its process conditions can
With according to the state of the art, or limited number of time test is determined, and the present invention is no longer defined with regard to which.
Air plasma spraying is flexibility is most strong in all of hot-spraying technique one, and it can produce enough energy
Amount fusing any material.Spraying method can be divided into atmospheric plasma, atmosphere protection plasma, vacuum plasma and the steady plasma of water
Spraying etc..Spraying equipment is mainly made up of spray gun, powder feeder, dc source, control system, heat exchanger and pipe-line system.By
Use powder as coating material in plasma spraying, the quantity of the coating material that can be used in plasma spray coating process is several
It is unlimited.Hf electric arc is lighted between anode (nozzle) and negative electrode (electrode), the process gas for flowing therebetween is (generally
Mixture for argon gas, nitrogen, hydrogen and helium) plume for thermal plasma gas is ionized, so as to exceed sun surface
6,600 DEG C to 16,600 DEG C of temperature.After coating material is injected into gas plume, material is melted and is fired to target base
Body.
The energy that the electric current co- controlling technique applied on the process gas for using and electrode is produced.Due to can be to every kind of
Gas and electric current used are accurately adjusted, so coating result can repeat and predict.Meanwhile, material is launched into plume
Place and angle and spray gun can be also controlled to the distance of target, produce appropriate material spraying ginseng so as to high flexible
Number, expands the temperature range of fusing.
The distance of plasma gun and target part, the relative velocity of spray gun and part and part are cooled down (generally by collection
In target matrix the help sprayed of air), typically the spraying temperature of part is controlled at 38 DEG C to 260 DEG C.
Preferably, impeller or housing of the base material of the present invention for Pulp pump.I.e.：
The NiCrAl primers are commercially available prod, and those skilled in the art can be commercially available, or oneself processing
Prepare.For example, according to 1-3:1-3:The atomic ratio compounding of 1-3 is obtained.
The present invention is combined using WC-NiB, and is arranged in the middle of NiCrAl between substrate surface and the gradient composite coating
Coating so that coating wear resistant corrosion resistant, and strong with adhesion.
The present invention is particularly suitable for the present invention using air plasma spraying technique compared to other hot-spraying techniques
Slurry pump impeller and the irregular component such as housing, and the technique coordinated with the certain material of the present invention, and the coating for obtaining is hard
Reinforce and lean on, anticorrosive wear-resistant.
The graded composite wear-resistant coating matrix that the present invention is obtained is placed in water sand mixture, carries out rotation wear test,
After 24 hours, weigh, and be compared with the weight before abrasion, abrasion loss rate illustrates present invention system less than 0.001%
The standby composite coating for obtaining is wear-resisting and is tightly combined firmly with matrix.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of impeller of Pulp pump or the preparation method of housing WC-NiB graded composite wear-resistant coatings, which includes：
(1) substrate surface is carried out sandblasting roughening treatment；
(2) wash substrate surface respectively with acetone and ethanol, and dry at 100-160 DEG C；
(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones, institute are carried out to the substrate surface
Transition region thickness is stated for 0.1mm；
(4) air plasma spraying WC-NiB mixed-powders are adopted on transition zone, and the two ratio is 10:1, obtain WC-
NiB graded composite wear-resistant coatings, the graded composite wear-resistant coating thickness are 0.2mm.
Embodiment 2
A kind of impeller of Pulp pump or the preparation method of housing WC-NiB graded composite wear-resistant coatings, which includes：
(1) substrate surface is carried out sandblasting roughening treatment；
(2) wash substrate surface respectively with acetone and ethanol, and dry at 100-160 DEG C；
(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones, institute are carried out to the substrate surface
Transition region thickness is stated for 0.3mm；
(4) air plasma spraying WC-NiB mixed-powders are adopted on transition zone, and the two ratio is 10:1, obtain WC-
NiB graded composite wear-resistant coatings, the graded composite wear-resistant coating thickness are 0.6mm.
Embodiment 3
A kind of impeller of Pulp pump or the preparation method of housing WC-NiB graded composite wear-resistant coatings, which includes：
(1) substrate surface is carried out sandblasting roughening treatment；
(2) wash substrate surface respectively with acetone and ethanol, and dry at 100-160 DEG C；
(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones, institute are carried out to the substrate surface
Transition region thickness is stated for 0.2mm；
(4) air plasma spraying WC-NiB mixed-powders are adopted on transition zone, and the two ratio is 5:1, obtain WC-
NiB graded composite wear-resistant coatings, the graded composite wear-resistant coating thickness are 0.4mm.
The graded composite wear-resistant coating matrix that embodiment 1-3 is obtained is placed in water sand mixture, carries out rotation abrasion examination
Test, after 24 hours, weigh, and be compared with the weight before abrasion, abrasion loss rate illustrates embodiment less than 0.01%
Composite coating that 1-3 is prepared is wear-resisting and is tightly combined firmly with matrix.
Claims (2)
1. a kind of preparation method of WC-NiB graded composites wear-resistant coating, which includes：
(1) substrate surface is carried out sandblasting roughening treatment；
(2) wash substrate surface respectively with acetone and ethanol, and dry at 100-160 DEG C；
(3) using air plasma spraying equipment, plasma spraying NiCrAl transition zones, the mistake are carried out to the substrate surface
Thickness degree is crossed for 0.1-0.3mm；
(4) WC-NiB graded composite wear-resistant coatings are obtained using air plasma spraying WC-NiB mixed-powders on transition zone,
The graded composite wear-resistant coating thickness is 0.2-0.6mm；
Described WC-NiB mixed-powders, which is nanoscale, and the two is with 10-3:1 weight is than mixing；
The NiB powder, Ni:The atomic ratio of B is 5-2:1.
2. the preparation method of WC-NiB graded composites wear-resistant coating as claimed in claim 1, it is characterised in that described base material
Impeller or housing for Pulp pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015174.0A CN106498334A (en) | 2016-11-18 | 2016-11-18 | A kind of preparation method of WC NiB graded composite wear-resistant coatings |
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| CN201611015174.0A CN106498334A (en) | 2016-11-18 | 2016-11-18 | A kind of preparation method of WC NiB graded composite wear-resistant coatings |
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Citations (3)
| 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 |
| CN101492749A (en) * | 2008-01-24 | 2009-07-29 | 宝山钢铁股份有限公司 | Tuyeres of blast furnace surface recombination coating and method for preparing the same |
| 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 CN201611015174.0A patent/CN106498334A/en active Pending
Patent Citations (3)
| 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 |
| CN101492749A (en) * | 2008-01-24 | 2009-07-29 | 宝山钢铁股份有限公司 | Tuyeres of blast furnace surface recombination coating and method for preparing the same |
| 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 (1)
| Title |
|---|
| 覃峰等: "《陶瓷/金属复合耐磨涂层的微观结构与磨损性能分析》", 《中国表面工程》 * |
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Application publication date: 20170315 |