CN108893696B - High-erosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, coating and preparation method thereof - Google Patents
High-erosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, coating and preparation method thereof Download PDFInfo
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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
- C23C4/12—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
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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
- C23C4/134—Plasma spraying
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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
- C23C4/18—After-treatment
Abstract
The invention discloses a high-impact-erosion-resistant and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, a coating and a preparation method thereof, wherein the powder comprises the following components: tungsten carbide (WC), a metal binder and a nano carbide strengthening phase, wherein the nano carbide strengthening phase is one or more of tantalum carbide (TaC), titanium carbide (TiC) and zirconium carbide (ZrC). The composite powder can effectively improve the strength and hardness of a metal bonding phase, simultaneously inhibit the growth of grains of WC in the thermal spraying process, improve the erosion resistance of the coating by 50-200 percent compared with the common tungsten carbide-based metal ceramic coating, obviously improve the toughness, hardly cause burst, and keep good high temperature resistance, corrosion resistance and cavitation resistance.
Description
Technical Field
The invention belongs to the technical field of material surface strengthening, relates to tungsten carbide-based metal ceramic powder and a coating, and particularly relates to high-impact-erosion-resistant and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, a coating and a preparation method thereof.
Background
Erosion abrasion, cavitation erosion and corrosion are one of the main forms of hydraulic machinery failure such as a water turbine and the like, and are widely used in flow passage components of machinery such as the water turbine, a water pump and the like, so that the efficiency of the hydraulic machinery is low, the service life is shortened, the stability and the safe operation of a unit are seriously influenced, and huge resources and economic waste are caused. The thermal spraying tungsten carbide metal ceramic coating has good erosion resistance and certain cavitation resistance and corrosion resistance, but the erosion resistance of the thermal spraying tungsten carbide metal ceramic coating is still insufficient in high-silt water flow such as Xinjiang, yellow river and the like, particularly the erosion resistance of quartz sand, and the stripping failure of the coating is caused by the cracking phenomenon of the tungsten carbide coating frequently. And in the high-speed operation process of the hydraulic machine, the tungsten carbide metal ceramic coating can generate a huge cavitation action, so that the tungsten carbide metal ceramic coating can not play a role in anti-cavitation protection for the base material. Microscopic analysis on the failure coating shows that in high-sediment water flow, because the hardness of sand grains is high, under the continuous impact action of sand-containing water flow, the sand grains firstly cause a serious cutting action on a bonding phase of the tungsten carbide-based coating. The binder phase of the coating is removed by the micro-cutting and plowing action of the scour particles, resulting in WC particles being exposed at the surface of the coating. As the surface layer binder phase is gradually reduced, the binding action of the WC particles on the surface layer is gradually weakened and the particles are detached by the impact of the particles, and the coating is gradually worn. Meanwhile, the coating generates cracks under the high-speed impact of silt, and the cracks continuously extend and expand under the action of subsequent long-time impact, so that the coating is cracked and fails. Thus, long-term erosion protection is not available.
Disclosure of Invention
The invention aims to provide high-impact-corrosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, a coating and a preparation method thereof aiming at overcoming the defects of the prior art, so as to solve the problem that the existing tungsten carbide-based metal ceramic coating material cannot meet the actual engineering use requirements, and improve the impact corrosion resistance and the anti-cracking performance of equipment while giving consideration to good corrosion resistance.
The invention is realized by adopting the following technical scheme:
a high-erosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder comprises the following components:
tungsten carbide (WC): 30-80 wt%, metal binder: 10-60 wt% of a nano carbide strengthening phase: 5-20 wt%, the nano carbide strengthening phase is one or a combination of more of tantalum carbide (TaC), titanium carbide (TiC) and zirconium carbide (ZrC).
In the above technical scheme, the metal binder is one or a combination of two of Co, Cr and Ni.
The granularity of the tungsten carbide (WC) is 0.5-8 μm or 50-200 nm.
The particle size of the nano carbide strengthening phase is 20-100 nm.
The particle size of the composite powder is 10-55 mu m.
The composite powder is used as a raw material, kerosene supersonic flame spraying or atmospheric supersonic flame spraying is adopted to spray the raw material, and a nano-carbide reinforced tungsten carbide-based composite coating with high erosion resistance and anti-explosion performance can be directly formed; or the composite coating can be obtained by spraying the raw materials with kerosene supersonic flame or atmospheric supersonic flame, and remelting and forming with high enthalpy plasma.
The specific preparation process comprises the following steps:
1) the preparation method comprises the steps of preparing tungsten carbide, a metal binder and a nano carbide strengthening phase according to a certain mass percentage, adding alcohol and polyethylene glycol into prepared formula raw materials, and fully mixing in a ball mill for 20-30 hours.
2) And (3) performing spray drying granulation on the prepared slurry by adopting water atomization or alcohol atomization, and sintering the granulated original composite powder in a molybdenum wire furnace under a hydrogen protective atmosphere at the sintering temperature of 1000-1250 ℃. And crushing and screening after sintering to obtain the high-impact-corrosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder, wherein the particle size of the nano carbide reinforced tungsten carbide-based composite powder is 10-55 mu m.
3) And (3) drying the composite powder in a heat preservation box at the heat preservation temperature of 60-100 ℃ for 1-2 hours.
4) The surface of the carbon steel or alloy steel base material is cleaned, derusted and dried, and the surface is sandblasted and roughened, and the surface roughness after sandblasting is 6.3-12.0 mu m.
5) Taking the dried composite powder in the step 3) as a raw material, and directly forming a nano carbide reinforced tungsten carbide-based composite coating with high impact erosion resistance and anti-explosion performance by adopting kerosene supersonic flame spraying or atmospheric supersonic flame spraying or high enthalpy plasma spraying; or the raw material is subjected to kerosene supersonic flame spraying or atmospheric supersonic flame spraying or high-enthalpy plasma spraying, and then subjected to high-enthalpy plasma remelting forming to obtain the nano-carbide reinforced tungsten carbide-based composite coating with high erosion resistance and explosion resistance.
The porosity of the composite coating obtained by the invention is less than 0.5 percent; the bonding strength of the composite coating reaches more than 80MPa, under the condition of high sediment water flow, the erosion weight loss of the composite coating is only 3.3-6.7% of that of 0Cr13Ni5Mo high-strength stainless steel, the cavitation weight loss is 77-67% of that of the high-strength stainless steel, almost no bursting occurs, and the self-corrosion potential is higher than that of a common tungsten carbide-based metal ceramic coating. The composite coating has corrosion resistance and high-temperature resistance, and has more excellent erosion resistance and burst resistance.
The invention has the beneficial effects that:
the invention obtains the nano-carbide reinforced tungsten carbide-based composite powder and the coating with high erosion resistance and explosion resistance by continuously researching the components of the tungsten carbide-based powder and the preparation method of the coating, effectively improves the strength and the hardness of a metal bonding phase, simultaneously inhibits the grain growth of WC in the thermal spraying process, improves the erosion resistance of the coating by 50-200 percent compared with the common tungsten carbide-based metal ceramic coating, obviously improves the toughness, almost has no explosion, simultaneously keeps good corrosion resistance and cavitation resistance, has reliable process and stable performance, is suitable for application and popularization in the fields of erosion resistance and cavitation resistance of water turbines, water pumps and the like, and is particularly suitable for high-silt water flow environments.
Detailed Description
The present invention is further illustrated by the following examples.
The kerosene supersonic flame spraying process parameters adopted in the embodiment of the invention are as follows: the flow rate of kerosene is 22-30L/h, the pressure of kerosene is 1.5-2.0 MPa, the flow rate of oxygen is 840-950L/min, the pressure of oxygen is 1.7-2.0 MPa, the powder feeding rate is 80-100 g/min, the flow rate of nitrogen is 10-15L/min, the pressure of nitrogen is 1.0-1.2 MPa, and the spraying distance is 350-400 mm.
The technical parameters of the atmospheric supersonic flame spraying adopted in the embodiment of the invention are as follows: the propane pressure is 0.6-0.8 MPa, and the air pressure is as follows: 0.7-0.9 MPa, nitrogen pressure: 0.2-0.4 MPa, the powder feeding rate is 80-120 g/min, and the spraying distance is 150-220 mm.
The embodiment of the invention adopts the technical parameters of high enthalpy plasma remelting: the power of the spray gun is 80-100 kW, the argon flow is 250-400 SCFH (cubic feet per hour), the nitrogen flow is 100-150 SCFH (cubic feet per hour), the hydrogen flow is 90-130 SCFH (cubic feet per hour), the powder feeding rate is 80-110 g/min, and the working distance is 50-150 mm.
In the embodiment of the invention, nano carbide reinforced tungsten carbide-based composite powder with high impact resistance and anti-explosion performance is used as a raw material, and the nano carbide reinforced tungsten carbide-based composite powder comprises the following components: 30-80 wt%, metal binder: 10-60 wt% of a nano carbide strengthening phase: 5 to 20 wt%. The metal binder is one or the combination of two of Co, Cr and Ni. The nano carbide strengthening phase is one or the combination of two or three of tantalum carbide (TaC), titanium carbide (TiC) and zirconium carbide (ZrC). The granularity of the tungsten carbide (WC) is 0.5-8 mu m or 50-200 nm. The particle size of the nano carbide strengthening phase is 20-100 nm; the particle size of the composite powder is 10-55 mu m.
In the embodiment of the invention, the spraying substrate is made of 45 carbon steel or 0Cr13Ni5Mo stainless steel.
Example 1
Tungsten carbide (WC) with the granularity of 60-100 nm, a metal binder Co and nano tantalum carbide (TaC) with the granularity of 30-50 nm are mixed according to the weight ratio of tungsten carbide (WC): 80 wt%, metal binder Co: 15 wt%, nano tantalum carbide (TaC): preparing 5 wt% of the raw materials, adding alcohol and polyethylene glycol into the prepared formula raw materials, and fully mixing in a ball mill for 20 hours.
And (3) performing spray drying granulation on the prepared slurry by adopting water atomization, and sintering the granulated original composite powder in a molybdenum wire furnace under the hydrogen protective atmosphere at the sintering temperature of 1100 ℃. And crushing and screening the sintered product to obtain the high-impact-corrosion-resistance anti-cracking nano tantalum carbide reinforced tungsten carbide-cobalt composite powder. The particle size of the composite powder is 15-45 mu m.
And (3) drying the composite powder in a heat preservation box at the heat preservation temperature of 60 ℃ for 1 hour.
And cleaning, derusting and drying the surface of the carbon steel, and blasting sand to roughen the surface of the carbon steel, wherein the surface roughness after sand blasting is 6.3-12.0 mu m.
The dried composite powder is used as a raw material, kerosene supersonic flame spraying is adopted for the raw material, and the spraying process parameters are as follows: the kerosene flow was 25L/h, the kerosene pressure was 1.5MPa, the oxygen flow was 865L/min, the oxygen pressure was 2.0MPa, the powder feed rate was 85g/min, the nitrogen flow was 10L/min, the nitrogen pressure was 1.2MPa, and the spraying distance was 375 mm. The nano tantalum carbide reinforced tungsten carbide-cobalt chromium composite coating with high erosion resistance and burst resistance is obtained by spraying.
The thickness of the composite coating is 250 mu m, the porosity of the coating is 0.36%, the bonding strength of the coating is 88MPa, the erosion weight loss of the coating is only 4.21% of 0Cr13Ni5Mo high-strength stainless steel under high silt flow, the coating has no explosion phenomenon, the cavitation weight loss is only 68.32% of the high-strength stainless steel, the self-corrosion potential of the coating is-0.1969V, and the coating is higher than that of a common tungsten carbide coating (about-0.28V). The composite coating has high erosion resistance and anti-explosion performance, and has good cavitation resistance and corrosion resistance.
Example 2
Tungsten carbide (WC) with the granularity of 50-90 nm, a metal binder Co, a metal binder Cr and nano titanium carbide (TiC) with the granularity of 20-50 nm are mixed according to the weight ratio of tungsten carbide (WC): 70 wt%, metallic binder Co: 10 wt%, metal binder Cr4 wt%, nano titanium carbide (TiC): preparing 6 wt% of the raw materials, adding alcohol and polyethylene glycol into the prepared formula raw materials, and fully mixing the raw materials in a ball mill for 25 hours.
And (3) performing spray drying granulation on the prepared slurry by adopting water atomization, and sintering the granulated original composite powder in a molybdenum wire furnace under a hydrogen protective atmosphere at the sintering temperature of 1150 ℃. And crushing and screening the sintered product to obtain the high-impact-corrosion-resistance anti-cracking nano titanium carbide reinforced tungsten carbide-cobalt chromium composite powder. The particle size of the composite powder is 10-30 mu m.
And (3) drying the composite powder in a heat preservation box at the heat preservation temperature of 60 ℃ for 1 hour.
And cleaning, derusting and drying the surface of the carbon steel, and blasting sand to roughen the surface of the carbon steel, wherein the surface roughness after sand blasting is 6.3-12.0 mu m.
The dried composite powder is used as a raw material, the raw material is sprayed by adopting atmospheric supersonic flame, and the spraying process parameters are as follows: propane pressure: 0.65MPa, air pressure: 0.8MPa, nitrogen pressure: 0.25MPa, the powder feeding rate is 80g/min, and the spraying distance is 150 mm. The nano titanium carbide reinforced tungsten carbide-cobalt chromium composite coating with high erosion resistance, burst resistance, cavitation resistance and corrosion resistance is obtained by spraying.
The thickness of the composite coating is 235 microns, the porosity of the coating is 0.30%, the bonding strength of the coating is 84MPa, the erosion weight loss of the coating is only 6.6% of 0Cr13Ni5Mo high-strength stainless steel under high silt flow, almost no bursting phenomenon exists, the cavitation erosion weight loss is only 76.16% of the high-strength stainless steel, the self-corrosion potential of the coating is-0.1875V, and the coating is higher than that of a common tungsten carbide coating (about-0.28V). The composite coating has high erosion resistance and anti-explosion performance, and has good cavitation resistance and corrosion resistance.
Example 3
Tungsten carbide (WC) with the granularity of 60-120 nm, a metal binder Ni, a metal binder Cr, nano tantalum carbide (TaC) with the granularity of 20-50 nm, nano titanium carbide (TiC) with the granularity of 50-80 nm and nano zirconium carbide (ZrC) with the granularity of 20-50 nm are mixed according to the proportion of tungsten carbide (WC): 35 wt%, metal binder Ni: 35 wt%, 20 wt% of metal binder Cr, 4 wt% of nano tantalum carbide (TaC), and nano titanium carbide (TiC): 2 wt%, nano zirconium carbide (ZrC): preparing 4 wt% of the raw materials, adding alcohol and polyethylene glycol into the prepared formula raw materials, and fully mixing in a ball mill for 28 hours.
And (3) carrying out spray drying granulation on the prepared slurry by adopting alcohol atomization, and sintering the granulated original composite powder in a molybdenum wire furnace under a hydrogen protective atmosphere at the sintering temperature of 1150 ℃. And crushing and screening after sintering to obtain the high-impact-corrosion-resistance anti-cracking composite powder. The particle size of the powder is 15-55 μm.
And (3) drying the composite powder in a heat preservation box at the heat preservation temperature of 80 ℃ for 1.5 hours.
The surface of 0Cr13Ni5Mo stainless steel is cleaned, derusted and dried, and the surface is sandblasted and roughened, and the surface roughness after sandblasting is 6.3-12.0 mu m.
The dried composite powder is used as a raw material, the composite powder in the example is sprayed by supersonic flame, the kerosene flow is 26L/h, the kerosene pressure is 1.5MPa, the oxygen flow is 850L/min, the oxygen pressure is 2.0MPa, the powder feeding speed is 80g/min, the nitrogen flow is 10L/min, the nitrogen pressure is 1.2MPa, and the spraying distance is 385 mm. The coating was then remelted using a high enthalpy plasma remelting technique with a torch power of 96kW, an argon flow of 358SCFH (cubic feet per hour), a nitrogen flow of 125SCFH (cubic feet per hour), a hydrogen flow of 198SCFH (cubic feet per hour), and a remelting distance of 50 mm. The nanometer tantalum carbide, titanium carbide and zirconium carbide reinforced tungsten carbide-cobalt chromium composite coating with high erosion resistance, burst resistance, cavitation resistance and corrosion resistance is obtained.
The thickness of the composite coating is 250 mu m, the coating is almost free of pores, the bonding strength of the coating is more than 90MPa, under the flow of high silt and water, the erosion weight loss of the coating is only 6.63% of 0Cr13Ni5Mo high-strength stainless steel, almost no bursting occurs, the cavitation weight loss is only 67% of the high-strength stainless steel, and the self-corrosion potential of the coating is-0.1638V, which is higher than that of a common tungsten carbide coating (about-0.28V). The composite coating has high erosion resistance and anti-explosion performance, and has good cavitation resistance and corrosion resistance.
Claims (7)
1. A high-erosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder is characterized by comprising the following components:
tungsten carbide (WC): 30-80 wt%, metal binder: 10-60 wt% of a nano carbide strengthening phase: 5-20 wt%, the nano carbide strengthening phase is one or a combination of more of tantalum carbide (TaC), titanium carbide (TiC) and zirconium carbide (ZrC).
2. The high erosion and blast resistant nanocarbide reinforced tungsten carbide based composite powder of claim 1, wherein the metal binder is one or a combination of two of Co, Cr and Ni.
3. The high erosion and blast resistant nanocarbide reinforced tungsten carbide based composite powder of claim 1, wherein the particle size of tungsten carbide (WC) is 0.5 to 8 μm or 50 to 200 nm.
4. The high erosion and blast resistant nanocarbide reinforced tungsten carbide based composite powder of claim 1, wherein the nanocarbide reinforcing phase particle size is 20 to 100 nm.
5. The high erosion and blast resistant nanocarbide reinforced tungsten carbide based composite powder of claim 1, wherein the composite powder has a particle size of 10 to 55 μm.
6. A high-impact-erosion-resistant and anti-cracking nano carbide reinforced tungsten carbide-based composite coating is characterized in that the coating takes the composite powder as claimed in claim 5 as a raw material, and adopts kerosene supersonic flame spraying or atmospheric supersonic flame spraying or high-enthalpy plasma spraying to the raw material; or the raw materials are firstly sprayed by kerosene supersonic flame, atmospheric supersonic flame or high-enthalpy plasma, and then the raw materials are molded by high-enthalpy plasma; and (4) obtaining.
7. The method for preparing the nano-carbide reinforced tungsten carbide-based composite coating with high erosion resistance and explosion resistance as claimed in claim 6, which is characterized by comprising the following steps:
1) preparing tungsten carbide, a metal binder and a nano carbide strengthening phase according to mass percent, adding alcohol and polyethylene glycol into the prepared formula raw materials, and fully mixing in a ball mill for 20-30 hours;
2) performing spray drying granulation on the prepared slurry by adopting water atomization or alcohol atomization, putting the granulated powder into a molybdenum wire furnace under the hydrogen protection atmosphere for sintering at the sintering temperature of 1000-1250 ℃, and crushing and screening after sintering to obtain high-impact-erosion-resistance and anti-cracking nano carbide reinforced tungsten carbide-based composite powder with the particle size of 10-55 microns;
3) drying the composite powder in a heat preservation box at the temperature of 60-100 ℃ for 1-2 hours;
4) cleaning, derusting and drying the surface of a carbon steel or alloy steel base material, and blasting sand to roughen the surface of the carbon steel or alloy steel base material, wherein the surface roughness is 6.3-12.0 mu m after sand blasting;
5) taking the dried composite powder in the step 3) as a raw material, and adopting kerosene supersonic flame spraying or atmospheric supersonic flame spraying to directly form a high-impact-erosion-resistant and anti-cracking nano carbide reinforced tungsten carbide-based composite coating; or the raw material is subjected to kerosene supersonic flame spraying or atmospheric supersonic flame spraying, and then subjected to high-enthalpy plasma remelting forming to obtain the nano-carbide reinforced tungsten carbide-based composite coating with high erosion resistance and explosion resistance.
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| CN109811294A (en) * | 2019-01-30 | 2019-05-28 | 扬州市职业大学(扬州市广播电视大学) | A method of enhancing turbine blade surface with supersonic flame spraying |
| CN110172605A (en) * | 2019-06-03 | 2019-08-27 | 河南四方达超硬材料股份有限公司 | A kind of metal matrix ceramic composites raw powder's production technology |
| CN111978088B (en) * | 2020-07-28 | 2022-10-11 | 湘潭大学 | Toughened ultrahigh-density ultrahigh-temperature ablation-resistant coating and preparation method thereof |
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