CN109207995B - High-flux abrasion-resistant material plasma cladding preparation system and implementation method thereof - Google Patents
High-flux abrasion-resistant material plasma cladding preparation system and implementation method thereof Download PDFInfo
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Abstract
The invention discloses a high-flux abrasion-resistant material plasma cladding preparation system and an implementation method thereof. During implementation, required powder is placed into each charging barrel, the speed of a servo motor of each charging barrel powder feeding mechanism is adjusted, so that the powder in each charging barrel falls into a stirring barrel below according to a designed proportion, and the powder is stirred and uniformly mixed and then is sent to a powder storage tank to wait for plasma cladding. The invention can directly prepare abrasion-resistant coatings or gradient materials with various formulas and different processes on the same metal matrix at one time, thereby reducing experimental errors.
Description
Technical Field
The invention relates to a preparation and screening technology of a high-flux abrasion-resistant material, belonging to the field of surface treatment of metal materials. In particular to a coating material which can efficiently obtain different components, tissue structures and abrasion resistance by using a plasma fusion method, thereby improving the research and development efficiency; meanwhile, the coating and the matrix are metallurgically bonded, and the gradient material with continuously changed performance in the thickness direction can be obtained at high efficiency.
Background
The protective coating material and the performance of the surface of a workpiece are not satisfactory in complex and severe abrasion and corrosion environments when the gate valves in the coal chemical industry and the petroleum industry of China, and various sand pumps, slurry pumps, water turbines, conveying pipelines and the like in the mine and cement industry work, so that the service life is greatly shortened, potential safety hazards are brought, and the gate valves become wearing parts with the largest consumption.
The currently common ways to obtain ultra-thick and strong metallurgical bonding coatings on surfaces mainly include: laser and plasma cladding, overlaying, bimetal composite casting or imbedding and the like are all to prepare different cladding layers on different metal material base materials and then respectively detect the performances of wear resistance, corrosion resistance and the like. The current common practice is mostly limited to an experimental method, different element proportions are adjusted according to the requirements of workpieces, different samples are prepared, and then the performance of the samples is measured. However, in the face of the preparation of multi-element and multi-proportion abrasion-resistant coatings, the efficiency is low, the cost is high, the time consumption is long, and the process parameters influencing the performance of the coatings in the preparation process are many, so that the application of the research method can not meet the requirements of different industries on abrasion-resistant materials and coatings.
Chinese patent CN 106198366 a discloses an ion beam sputtering method for a high-flux soft magnetic material surface anticorrosive layer, which can perform high-flux design and preparation, has high efficiency and low cost, shortens the period of research and development, and is suitable for preparing multi-element and multi-proportion anticorrosive materials, thereby obtaining a large number of surface anticorrosive material samples with excellent performance.
Chinese patent CN 105954074A discloses a device for preparing multi-component gradient metal material with high flux, which realizes the high flux preparation of multi-component gradient of multi-component alloy pipe, rod, profile and other long materials with chemical components continuously distributed in gradient along the length direction. The preparation of the high-flux multi-component gradient metal material is realized by controlling the continuous casting process of molten metal components, the time process of designing, smelting, preparing performance and preparing application of the material from the components is shortened, the metallurgical energy consumption of multi-furnace smelting alloy is reduced, the development cost is reduced, and the preparation quality and efficiency of the new metal gradient material are improved. The device has inflexible control mode of powder flow and cannot realize accurate control.
Chinese patent CN 105839169A discloses an electro-deposition high-flux preparation device and method of a material, wherein almost all components of the whole system can be prepared by a single experiment, and the electro-deposition high-flux preparation device can be used for preparing micro-nano samples for experimental research and large-scale industrial production.
Chinese patent CN 105935780 a discloses a device for synthesizing metal-based powder material and a high-throughput synthesis method thereof. Chinese patent CN 105834691A discloses a high-flux preparation method of zirconium alloy, relates to a high-flux preparation method of zirconium alloy used as nuclear fuel cladding in a water-cooled nuclear reactor, and can quickly establish a high-flux preparation and characterization method of the relation between the corrosion resistance and the components of the zirconium alloy.
By adopting the different high-flux design and preparation methods, the preparation quality and efficiency of the new material can be improved, but the method for developing the ultra-thick and strong metallurgical bonding coating with the abrasion resistance by applying the combined preparation and high-flux screening technology has not been reported at home and abroad so far. When the abrasion-resistant coating is designed and manufactured, the performance of the abrasion-resistant coating needs to be mastered, but the influence of the components and the structure of the abrasion-resistant coating on the performance is very complex, and the preparation efficiency is low, so that the performance of the coating is single, and the requirements of large-range and complex working condition conditions cannot be met; meanwhile, in order to obtain the influence rule of the process parameters and the test conditions of the system on the abrasion-resistant material, a large amount of time is usually consumed to carry out a series of experiments, so that the development cycle of a new material is greatly hindered; meanwhile, many abrasion-resistant materials with impact resistance requirements need to be obtained by the continuous change of raw material components or a preparation process of different performance gradients, namely, a coating and a matrix are metallurgically combined, and the performance of the materials is a gradient material with continuously changed thickness direction. Therefore, the development of a technology for preparing the abrasion-resistant material and the coating with high throughput is urgently needed, ideal performance is rapidly obtained, the research and development efficiency is improved, and the cost is reduced.
Disclosure of Invention
In order to solve the technical problems of poor adjustability of powder flow and poor proportioning accuracy in the prior art, the invention provides a high-flux plasma cladding preparation system for an abrasion-resistant material, which can obtain an ultra-thick and strong metallurgical bonding coating with abrasion resistance. The system drives a synchronous belt and a belt wheel by a servo motor, and the powder flow, the proportioning accuracy and the continuous adjustment are realized more easily through inorganic speed change.
The invention also provides an implementation method of the system.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a high flux abrasion-resistant material plasma cladding preparation system, it includes a plurality of feed cylinders, first powder feeding mechanism, at least one agitator tank, a storage powder jar, a set of second powder feeding mechanism and a plasma generator that top-down set up, requires every feed cylinder to correspond a set of first powder feeding mechanism, wherein:
first powder feeding mechanism and second powder feeding mechanism structure the same, single set of powder feeding mechanism structure is: the automatic powder feeding device comprises a closed shell, wherein the upper end of the closed shell is connected with a powder outlet of a charging barrel through a feeding pipe, a synchronous belt wheel is arranged inside the closed shell, the synchronous belt wheel is connected to the output end of an external servo motor, and a synchronous belt is arranged on the synchronous belt wheel; the lower end of the closed shell is connected with the feed inlets of all the stirring tanks through parallel powder feeding pipes, valves are arranged on the parallel powder feeding pipes, and the valves are arranged to control powder of the charging barrel to be fed into a specified stirring tank;
the discharge port of the stirring tank is also connected with the powder storage tank through a powder feeding pipe, the lower end of the powder storage tank is connected with a second powder feeding mechanism, and the bottom end of the second powder feeding mechanism is connected with the plasma generator through a powder feeding pipe;
the charging barrel is provided with an air supply port;
further: a valve is also arranged at the discharge port of the mixing drum, and an air supply port is arranged at the top of the mixing drum;
the implementation method of the plasma cladding preparation system for the high-flux abrasion-resistant material comprises the following steps: the method specifically comprises the following steps:
step 1: powder preparation
The abrasion-resistant raw materials are divided into three categories: firstly, metal powder, secondly intermetallic compound raw material powder and thirdly ceramic strengthening phase raw material powder so as to obtain a metal-ceramic composite coating;
further, the metal powder includes: fe. Al, Ni, Co, Cr, etc.; the intermetallic compound raw material powder includes: fe + Al, Ni + Al, Co + Al, Cr + Al, etc.; the ceramic strengthening phase raw material powder comprises Ti + W + B4C+C3N, etc.;
step 2: charging
Designing a plurality of test schemes with different components and different proportions, and filling all raw materials involved in the test schemes into different barrels;
and step 3: high-flux continuous powder feeding and mixing
Starting a servo motor, adjusting the speed of the servo motor of each charging barrel powder feeding mechanism to enable the powder in each charging barrel to fall on a respective synchronous belt according to the proportion designed by the test scheme, driving a belt wheel and the synchronous belt when the servo motor rotates, enabling the powder on the synchronous belt to fall into a stirring barrel below, and stirring and uniformly mixing the powder in the stirring barrel; similarly, according to the same method, the flow rates of different raw materials are adjusted, and the supply amounts of different powders entering different mixing drums are controlled so as to meet different test schemes;
and 4, step 4: high flux plasma beam cladding
The powder falling into the stirring tank is stirred and uniformly mixed and then falls into a lower powder storage tank under the action of powder conveying gas, the powder falls onto a synchronous belt of a second powder conveying mechanism below the powder storage tank under the action of the powder conveying gas, the powder is conveyed into a plasma generator under the protection of argon through the second powder conveying mechanism, the powder is directly blown into a plasma beam molten pool for plasma cladding under the action of a plasma beam, and the generator is cooled through cooling circulating water;
step five: continuous high flux plasma beam cladding
After cladding is finished, obtaining a sample with a coating, opening a valve of another stirring tank, and preparing the coating of the second test design scheme according to the method of the fourth step, wherein in the cladding process, the vacated stirring cylinder can continue mixing of other test scheme components, so that continuous powder feeding of the plasma generator is realized; thus, the current of the plasma equipment is adjusted, the plasma beam horizontal movement is combined, the abrasion-resistant coatings with different component ratios or the abrasion-resistant coatings with the same component ratio and continuously changed process parameters-current are prepared on the metal surface through continuous powder feeding, and the samples of the gradient coatings with different components or process parameters can be formed through the horizontal movement of the plasma beam and the combination of height adjustment;
step six: screening samples
Step 6.1: sample processing
Respectively cutting the samples with different components or after cladding process parameters into sample sizes convenient for screening, preferably samples with the size of 10 x 10mm, and making sequence marks;
step 6.2: abrasion test
All samples are put on an abrasion experiment table, the actual working condition is simulated, reciprocating and rotary abrasion is carried out under the same environment, and meanwhile, mediums such as acid, alkali or salt are dripped in, so that the abrasion test of the coating material is completed at one time. After the specified time is reached, removing the sample, drying the sample, and cleaning the surface by using acetone;
step 6.3: abrasion resistance and comparison
Observing the abrasion morphology of different areas of all samples by using a three-dimensional morphology instrument, sequentially recording the volume loss of each sample, and evaluating the abrasion resistance of the coating according to the volume loss after abrasion; and measuring the average components of each sample by using an electronic probe, further quickly establishing the relationship between the abrasion resistance of the coating and the components and the process, and quickly screening according to the corresponding abrasion performance data result to finally obtain the components and the process parameters of the coating with excellent abrasion resistance.
When the metal-ceramic composite coating is prepared, the components of the intermetallic compound can be prepared in advance and directly added into one charging barrel, and the components of the intermetallic compound can also be added into different charging barrels respectively, so that the number of the required charging barrels is large.
Further, the flow rate of the intermetallic compound matrix raw material or metal powder in step 1 is uniform throughout the plasma cladding process, and the flow rate of the ceramic reinforcing phase raw material powder is gradually increased from zero to be consistent with the flow rate of the intermetallic compound matrix raw material powder. Therefore, by controlling the powder flow rate in the charging barrel, not only can a simple intermetallic compound coating be obtained to improve the corrosion resistance, but also a composite coating which takes the intermetallic compound as a matrix and has ceramic strengthening phase continuously changed from 0 to 50 wt.% can be obtained to improve the corrosion resistance.
Further, in the metal-ceramic composite coating described in step 1, by changing the intermetallic compound matrix and adjusting the ceramic phase content from 0 to 50 wt.%, a series of components can be automatically generated in one experiment, and meanwhile, intermetallic compound/ceramic composite coating samples with various different components can be obtained, so that the preparation efficiency can be remarkably improved, the exploration of the best components is accelerated according to different working conditions, the research and development period is shortened, and the experimental error is reduced.
The invention has the advantages that:
1. by adopting the technical scheme, compared with the prior art, the invention has the following technical effects: the invention adopts the synchronous belt and the belt pulley, controls the flow through the inorganic variable speed, continuously adjusts the powder flow speed, more easily realizes the powder flow, the proportion is accurate, and the continuous adjustment realizes the random combination of a plurality of components in different proportions, and is beneficial to selecting the optimal coating material component in a wide range; the coating is subjected to the same plasma cladding process without interruption, so that the identity of sample preparation conditions is ensured; efficient screening is carried out on samples with different components by using an accelerated test, and the test of the abrasion resistance of the coating is completed at one time; the high-throughput method can be used for high-throughput preparation and screening, has high efficiency and reduces experimental errors.
2. As for the high-flux preparation technology adopted by the invention, the advanced coating composition and performance quasi-continuous change preparation method is adopted, so that the method has great advantages in the research of the abrasion-resistant coating material. Compared with the traditional cladding coating technology, the preparation method of the invention comprises the following steps: the high-flux preparation can be carried out, so that the material selection range is wide, the efficiency is high, and the cost is low; the method is particularly suitable for preparing multi-component and multi-process-parameter abrasion-resistant materials, so that a large number of abrasion-resistant material samples with excellent performance can be obtained; can directly prepare abrasion-resistant coatings or gradient materials with various formulas and different processes on the same metal matrix at one time, and reduces experimental errors.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a plasma cladding preparation system for a high flux erosion resistant material in accordance with the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1.
In the figure: 1-a charging barrel; 2-a first powder feeding mechanism; 3-a stirring tank; 4-powder storage tank; 5-a second powder feeding mechanism; 6-plasma generator; 7-a substrate; 8-plasma beam; 9-a molten pool; 10-cooling water pipe.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
As shown in fig. 1-2, an embodiment of a plasma cladding preparation system for a high-throughput abrasion-resistant material is longitudinally arranged from top to bottom, and sequentially comprises: five charging barrels 1, five sets of first powder feeding mechanisms 2, five stirring tanks 3, one powder storage tank 4, one set of second powder feeding mechanism 5 and a plasma generator 6. As can be seen from fig. 1, the lower ends of the five charging barrels 1 are respectively connected with the corresponding first powder feeding mechanisms 2 through powder feeding pipes, the first powder feeding mechanisms 2 and the second powder feeding mechanisms 5 have the same structure, and the single-set powder feeding mechanism has the following structure: the powder feeding device comprises a closed shell, wherein the upper end of the closed shell is connected with a powder feeding pipe of a charging barrel 1, a synchronous belt wheel is fixedly supported in the closed shell, the synchronous belt wheel is connected to the output end of an external servo motor, and a synchronous belt is arranged on the synchronous belt wheel; five powder feeding pipes extend out of the lower side of the closed shell, each powder feeding pipe is provided with a valve, the preferential installation position of the valve is the starting position of the powder feeding pipe, the five powder feeding pipes are respectively connected with five stirring tanks 3, and the lower ends of the five stirring tanks 3 are respectively connected to a powder storage tank 4 through the powder feeding pipes; the bottom of the powder storage tank 4 is connected with a second powder feeding mechanism 5 through a powder feeding pipe, the second powder feeding mechanism 5 is connected with a plasma generator 6 through a powder feeding pipe, and a substrate 7 is arranged at the corresponding position on the lower side of the plasma generator 6.
The following describes the implementation method of the plasma cladding preparation system of the high-flux abrasion-resistant material according to the present invention by using examples.
For convenience of description, the powder system in the examples is the same as the number of the cartridges
The first embodiment is as follows:
example one takes the preparation of an intermetallic-ceramic composite coating as an example.
Step 1: powder preparation
Intermetallic compound raw material: respectively proportioning Fe + Al, Ni + Al, Co + Al and Cr + Al according to the molar ratio of Fe to Al, Ni to Al, Co to Al and Cr to Al of 1:1, and respectively forming different FeAl, NiAl, CoAl and CrAl intermetallic compounds in the coating after cladding;
ceramic strengthening phase raw materials: according to the molar ratio of Ti to W to B4C:C3N43:3:2:1 or 4; 1:2:1 to obtain Ti + W + B4C+C3N4Raw materials are clad to form WC and W in an intermetallic compound matrix2C、TiB2Ceramic reinforcing phases such as TiC and Ti (C, N), and the like, and the intermetallic compound-ceramic composite coating of 5 systems in total.
Step 2: charging
Five systems of the two types of raw materials described in the step 1 are adopted: fe + Al, Ni + Al, Co + Al, Cr + Al, Ti, W, B4C:C3N4Respectively loading into five different charging barrels 1;
and step 3: high-flux continuous powder feeding and mixing
Starting a motor, enabling powder of the material barrel 1 to fall onto a synchronous belt, driving a belt wheel and the synchronous belt of a first powder feeding mechanism 2 of the material barrel 1 when the motor rotates, enabling the belt wheel to drive powder on the synchronous belt to fall into a stirring tank 3 for stirring and uniformly mixing, and adjusting the speed of a servo motor of the first powder feeding mechanism 1 of a certain material barrel, namely adjusting the material speed of raw materials in the material barrel 1, wherein the higher the speed is, the higher the content of the corresponding powder in the mixed raw materials is; the supply amount of different powders entering different stirring tanks 3 is controlled by adjusting the flow rate of different raw materials, and the powders in the stirring tanks 3 are fully mixed and then enter a powder storage tank so as to obtain different continuously-changed proportions; thus, the mixed powder in the five stirring tanks is equivalent to five test schemes, and the mixed powder has the same components and different proportions, or has different components and the same component proportions, or has different component proportions;
and 4, step 4: high flux plasma beam cladding
When powder in one stirring tank 3 is needed, a valve of the stirring tank 3 is opened, the powder falls into a powder storage tank 4 below under the action of powder conveying gas, the powder falls onto a synchronous belt of a second powder conveying mechanism below under the action of the powder conveying gas after the powder storage tank 4, the powder is conveyed by a second powder conveying mechanism 5 and is directly blown into a plasma generator 6 under the protection of argon, the powder is directly blown into a plasma molten pool 9 under the action of a plasma beam 8, and the generator is cooled by circulating water in a cooling water pipe 10;
step five: continuous high flux plasma beam cladding
After cladding is finished, obtaining a sample with a coating, opening a valve of another stirring tank, preparing the coating for the second time according to the method of the fourth step, and so on; in the cladding process, the vacated mixing drum 3 can continue mixing the components of other test schemes, so that continuous powder feeding of the plasma generator is realized; adjusting the current of the plasma equipment to be 100-200A, combining horizontal movement of plasma beams, preparing abrasion-resistant coatings with different component ratios on the metal surface through continuous powder feeding, or preparing the abrasion-resistant coatings with the same component ratio and continuously changing process parameters-current, or combining horizontal movement of the plasma beams with height adjustment to form samples of gradient coatings with different components or process parameters;
the plasma cladding process parameters are as follows: the powder feeding speed is controlled to be 8-15g/min, the transferred arc current is 100-200A, the voltage is 50V, the horizontal moving linear speed of a plasma generator is 500-700mm/min, the gas quantity of the powder feeding gas argon is 5-8L/min, the diameter phi 10mm of a plasma beam spot is equal to the width of a sample unit in the sample array, the distance between a plasma nozzle and the surface is 10mm, and the thickness of the coating is controlled to be 2.0-5.0 mm.
Step six: screening for optimal assay protocols
Step 6.1: sample processing
Respectively cutting the samples with different components or after cladding process parameters into sample sizes convenient for screening, preferably samples with the size of 10 x 10mm, and making sequence marks;
step 6.2: abrasion test
Putting all samples on an abrasion experiment table, simulating the actual working condition, carrying out reciprocating and rotary abrasion under the same environment, and simultaneously dripping media such as acid, alkali or salt and the like to finish the abrasion test of the coating material at one time; after the specified time is reached, removing the sample, drying the sample, and cleaning the surface by using acetone;
step 6.3: abrasion resistance and comparison
Observing the abrasion morphology of different areas of all samples by using a three-dimensional morphology instrument, sequentially recording the volume loss of each sample, and evaluating the abrasion resistance of the coating according to the volume loss after abrasion; and measuring the average components of each sample by using an electronic probe, further quickly establishing the relationship between the abrasion resistance of the coating and the components and the process, and quickly screening according to the corresponding abrasion performance data result to finally obtain the components and the process parameters of the coating with excellent abrasion resistance.
Furthermore, the flow rates of the powders of the intermetallic compound matrix raw materials Fe + Al, Ni + Al, Co + Al, Cr + Al and the like in the step 1 are uniform all the time in the plasma cladding process, and the ceramic reinforcing phase raw material Ti + W + B4C+C3N4The flow rate of the powder is increased from zero to correspond to the flow rate of the intermetallic matrix starting material powder. Therefore, by controlling the powder flow rate in the two charging barrels, not only can a simple FeAl, NiAl, CoAl, CrAl and other intermetallic compound coating be obtained to improve the corrosion resistance, but also a ceramic strengthening phase WC + W can be obtained by taking the FeAl, NiAl, CoAl or CrAl and other intermetallic compounds as a matrix2C+TiB2The composite coating with + TiC + Ti (C, N) continuously changed from 0-50wt% improves the abrasion resistance.
Furthermore, the metal ceramic composite coating in the step 1 can automatically generate a series of components in one experiment by changing the intermetallic compound matrix and adjusting the content of the ceramic phase from 0 to 50wt%, and can simultaneously obtain 250 groups of intermetallic compound/ceramic composite coating samples with different components at most, thereby obviously improving the preparation efficiency, quickening the exploration of the best component, shortening the research and development period and reducing the experimental error aiming at different working conditions. The technology realizes the mixing of different component powders by controlling the flow of the powders, and the synchronous belt and the belt wheel are driven by the servo motor, and the flow of the powders, the proportion accuracy and the continuous adjustment are more easily realized by inorganic speed change.
Example two:
the second example is to prepare a simple intermetallic compound coating, which is basically the same as the first example except that the raw materials are metallic raw materials of Fe, Al, Ni, Co, Cr, and five metallic raw materials are charged into five different charging barrels 1.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (3)
1. A high-flux abrasion-resistant material plasma cladding preparation and screening method is characterized in that a system used by the preparation and screening method comprises a plurality of charging barrels, a first powder feeding mechanism, at least one stirring tank, a powder storage tank, a set of second powder feeding mechanism and a plasma generator which are arranged from top to bottom, wherein each charging barrel is required to correspond to one set of first powder feeding mechanism, and the method comprises the following steps:
first powder feeding mechanism and second powder feeding mechanism structure the same, single set of powder feeding mechanism structure is: the automatic powder feeding device comprises a closed shell, wherein the upper end of the closed shell is connected with a powder outlet of a charging barrel through a feeding pipe, a synchronous belt wheel is arranged inside the closed shell, the synchronous belt wheel is connected to the output end of an external servo motor, and a synchronous belt is arranged on the synchronous belt wheel; the lower end of the closed shell is connected with the feed inlets of all the stirring tanks through parallel powder feeding pipes, valves are arranged on the parallel powder feeding pipes, and the valves are arranged to control powder of the charging barrel to be fed into a specified stirring tank;
the discharge port of the stirring tank is also connected with the powder storage tank through a powder feeding pipe, the lower end of the powder storage tank is connected with a second powder feeding mechanism, the bottom end of the second powder feeding mechanism is connected with the plasma generator through a powder feeding pipe, a valve is also arranged at the discharge port of the stirring tank, and an air feeding port is arranged at the top of the stirring tank;
the charging barrel is provided with an air supply port;
the method for preparing and screening high-flux abrasion-resistant materials by using the system comprises the following steps:
step 1: powder preparation
The abrasion-resistant raw materials are divided into three categories: firstly, metal powder, secondly intermetallic compound raw material powder and thirdly ceramic strengthening phase raw material powder so as to obtain a metal-ceramic composite coating;
step 2: charging
Designing a plurality of test schemes with different components and different proportions, and filling all raw materials involved in the test schemes into different barrels;
and step 3: high-flux continuous powder feeding and mixing
Starting a servo motor, adjusting the speed of the servo motor of each charging barrel powder feeding mechanism to enable the powder in each charging barrel to fall on a respective synchronous belt according to the proportion designed by the test scheme, driving a belt wheel and the synchronous belt when the servo motor rotates, enabling the powder on the synchronous belt to fall into a stirring tank below, and stirring and uniformly mixing the powder in the stirring tank; similarly, according to the same method, the flow rates of different raw materials are adjusted, and the supply amounts of different powders entering different stirring tanks are controlled so as to meet different test schemes;
and 4, step 4: high flux plasma beam cladding
The powder falling into the stirring tank is stirred and uniformly mixed and then falls into a lower powder storage tank under the action of powder conveying gas, the powder falls onto a synchronous belt of a second powder conveying mechanism below the powder storage tank under the action of the powder conveying gas, the powder is conveyed into a plasma generator under the protection of argon through the second powder conveying mechanism, the powder is directly blown into a plasma beam molten pool for plasma cladding under the action of a plasma beam, and the generator is cooled through cooling circulating water;
during cladding, the flow rate of the intermetallic compound raw material powder or the metal powder in the step one is uniform all the time in the plasma cladding process, and the flow rate of the ceramic strengthening phase raw material powder is gradually increased from zero to be consistent with the flow rate of the intermetallic compound raw material powder or the metal powder, so that a pure intermetallic compound coating can be obtained by controlling the powder flow rate in the charging barrel, and a composite coating which takes the intermetallic compound as a matrix and continuously changes the ceramic strengthening phase from 0-50wt% can also be obtained;
step five: continuous high flux plasma beam cladding
After cladding is finished, obtaining a sample with a coating, opening a valve of another stirring tank, preparing the coating of the second test design scheme according to the method of the fourth step again to obtain another sample with the coating, and in the cladding process, the vacated stirring tank can continue mixing of other test scheme components to realize continuous powder feeding of the plasma generator;
step six: screening samples
Step 6.1: sample processing
Respectively cutting the samples with different components or after cladding process parameters into sample sizes convenient for screening, and making sequence marks;
step 6.2: abrasion test
Putting all samples on an abrasion experiment table, simulating actual working conditions, performing reciprocating and rotary abrasion under the same environment, dripping acidic, alkaline or salt medium, completing the abrasion test of the coating material at one time, taking the samples and drying after reaching the specified time, and cleaning the surface by using acetone;
step 6.3: abrasion resistance and comparison
Observing the abrasion morphology of different areas of all samples by using a three-dimensional morphology instrument, sequentially recording the volume loss of each sample, and evaluating the abrasion resistance of the coating according to the volume loss after abrasion; and measuring the average components of each sample by using an electronic probe, further quickly establishing the relationship between the abrasion resistance of the coating and the components and the process, and quickly screening according to the corresponding abrasion performance data result to finally obtain the components and the process parameters of the coating with excellent abrasion resistance.
2. The method for plasma cladding preparing and sizing a high throughput erosion resistant material of claim 1 wherein said metal powder comprises: fe. Al, Ni, Co and Cr; the intermetallic compound raw material powder includes: fe + Al, Ni + Al, Co + Al and Cr + Al; the ceramic strengthening phase raw material powder comprises Ti + W + B4C+C3N。
3. The method for plasma cladding preparing and screening high throughput erosion resistant material of claim 1 wherein said plasma cladding process parameters are: the powder feeding speed is controlled to be 8-15g/min, the transferred arc current is 100-200A, the voltage is 50V, the horizontal moving linear speed of a plasma generator is 500-700mm/min, the gas quantity of the powder feeding gas argon is 5-8L/min, the diameter phi 10mm of a plasma beam spot is equal to the width of a sample unit in the sample array, the distance between a plasma nozzle and the surface is 10mm, and the thickness of the coating is controlled to be 2.0-5.0 mm.
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| CN112827415A (en) * | 2020-12-31 | 2021-05-25 | 广德天运新技术股份有限公司 | Binder dosing unit is used in processing of acupuncture felt |
| CN113043422A (en) * | 2021-04-06 | 2021-06-29 | 中南大学 | High-flux direct-writing device and method for preparing porous ceramic based on precursor conversion method |
| CN113909044B (en) * | 2021-09-18 | 2022-11-08 | 惠州中京电子科技有限公司 | High-flux preparation system and method for PCB substrate |
| CN114309660A (en) * | 2021-12-06 | 2022-04-12 | 烟台大学 | High-throughput preparation device and method for bulk alloy |
| CN116695115B (en) * | 2023-06-09 | 2024-01-26 | 山东森峰激光装备有限公司 | Laser cladding powder feeder applied to gradient coating preparation |
| CN116536665B (en) * | 2023-07-06 | 2023-09-22 | 矿冶科技集团有限公司 | Method for rapidly preparing laser cladding functionally gradient coating and coating obtained by same |
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