CN115977864B - Screw drilling tool motor with strong wear resistance and erosion resistance and preparation method - Google Patents
Screw drilling tool motor with strong wear resistance and erosion resistance and preparation methodInfo
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- CN115977864B CN115977864B CN202310089960.9A CN202310089960A CN115977864B CN 115977864 B CN115977864 B CN 115977864B CN 202310089960 A CN202310089960 A CN 202310089960A CN 115977864 B CN115977864 B CN 115977864B
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Abstract
The invention discloses a screw drilling tool motor with strong wear resistance and erosion resistance and a preparation method thereof. The screw drilling tool motor comprises a stator and a rotor, wherein the stator consists of a stator matrix and a diamond wear-resistant layer A arranged on the inner surface of the stator matrix, the rotor consists of a rotor matrix and a diamond wear-resistant layer B arranged on the outer surface of the rotor matrix, the diamond wear-resistant layer A and the diamond wear-resistant layer B are both composed of alloy and diamond, and the thicknesses of the diamond wear-resistant layer A and the diamond wear-resistant layer B are all 2-5 mm.
Description
Technical Field
The invention relates to a screw drilling tool motor for petroleum drilling, in particular to a screw drilling tool motor with strong wear resistance and erosion resistance and a preparation method thereof.
Background
The screw drilling tool is widely applied to underground power drilling, and the motor is the most core part of the screw drilling tool. The screw drill motor consists of a stator and a rotor. The traditional screw drilling tool motor stator is manufactured by adopting rubber lining inside a steel sleeve, and has the defects of low high temperature resistance, corrosion resistance, wear resistance and bearing capacity, the rotor is usually formed by milling a steel body, the outer surface of the rotor is required to be subjected to surface strengthening treatment to improve the wear resistance, and the manufacturing process is complex. The stator and the rotor of the screw drilling tool motor rub against each other in the underground use process and are eroded by drilling fluid and underground particles, so that the service life of the screw drilling tool motor is reduced. In recent years, with the development of drilling industry, the drilling operation depth and the bottom hole temperature are higher and higher, and the requirements on the screw drilling tool are also higher and higher, so that a screw drilling tool motor with higher wear resistance and wider application range is needed to meet the production requirements.
The 3D printing technology belongs to one of the rapid manufacturing technologies, and has the advantages that the product design and manufacturing period is short, complex parts can be manufactured, the product precision is high, and the 3D printing technology is widely concerned, however, no report on the preparation of a high-wear-resistance and erosion-resistance screw drilling tool motor by adopting a 3D printing manufacturing method exists in the prior art.
Disclosure of Invention
In view of the shortcomings of the prior art, a first object of the present invention is to provide a screw drilling tool motor with strong wear resistance and erosion resistance, which has the advantages of strong wear resistance, erosion resistance, high temperature resistance, corrosion resistance, long service life and the like.
The second object of the invention is to provide a method for preparing a screw drilling tool motor with strong wear resistance and erosion resistance.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The invention relates to a screw drilling tool motor, which comprises a stator and a rotor, wherein the stator consists of a stator matrix and a diamond wear-resistant layer A arranged on the surface of the stator matrix, the rotor consists of a rotor matrix and a diamond wear-resistant layer B arranged on the outer surface of the rotor matrix, the diamond wear-resistant layer A and the diamond wear-resistant layer B consist of alloy and diamond, and the thicknesses of the diamond wear-resistant layer A and the diamond wear-resistant layer B are 2-5 mm.
According to the screw drilling tool motor provided by the invention, the diamond wear-resistant layers with the thickness of 2-5 mm are respectively arranged on the surfaces of the stator matrix and the rotor matrix, so that the wear resistance, erosion resistance, high temperature resistance and corrosion resistance of the screw drilling tool motor are greatly improved, and the service life of the screw drilling tool motor is greatly prolonged.
In the preferred scheme, in the diamond wear-resistant layer A and the diamond wear-resistant layer B, the volume ratio of alloy to diamond is 1-9:1, and the alloy comprises 20-50% of copper, 3-7% of tin, 20-60% of tungsten carbide, 1-10% of nickel, 1-6% of manganese and 1-15% of cobalt.
The diamond wear-resistant layers A and B provided by the invention are both composed of alloy and diamond, wherein copper and tin are used as framework materials in the alloy to play a supporting role, nickel, cobalt and manganese are used as alloy materials for improving the matrix performance of the wear-resistant layers, tungsten carbide mainly plays a role in enhancing the wear resistance of the wear-resistant layers, under the control of the components and the components, the inventor finds that the proportion of raw materials of the wear-resistant layers is important, and if the proportion of prefabricated alloy micro powder is unreasonable, the wear resistance of the prepared stator and rotor wear-resistant layers is lower, and the strong wear-resistant and erosion-resistant effects cannot be exerted.
Further preferably, the components of the diamond wear-resistant layer A and the diamond wear-resistant layer B are the same in proportion, and the components of the alloy comprise 30-45% of copper, 4-7% of tin, 30-40% of tungsten carbide, 5-8% of nickel, 4-6% of manganese and 5-12% of cobalt.
The inventor finds that the wear resistance and erosion resistance of the screw drilling tool motor provided by controlling the component ratio of the diamond wear-resistant layer A to the diamond wear-resistant layer B within the above range are optimal.
In a preferred embodiment, the stator matrix and the rotor matrix are made of iron.
In a preferred scheme, the rotor is located in the inner cavity of the stator, the distance from the outer surface of the rotor to the inner surface of the stator is 0.1-0.5 mm, and the rotor and the stator are in clearance fit in a matching mode.
The invention relates to a preparation method of a screw drilling tool motor, which comprises the steps of mixing iron powder and a binding agent to obtain a stator and rotor mixture, mixing the stator and rotor mixture, granulating, drawing wires to obtain a stator and rotor filiform material, mixing diamond micropowder, alloy raw material powder and binding agent according to a designed proportion to obtain a wear-resistant layer mixture, mixing the wear-resistant layer mixture, granulating, drawing wires to obtain a wear-resistant layer filiform material, printing the stator and rotor filiform material to obtain a stator basal body green body and a rotor basal body green body respectively, printing the wear-resistant layer filiform material on the surface of the stator basal body green body to obtain a stator green body, printing the wear-resistant layer filiform material on the surface of the rotor basal body green body to obtain a rotor green body, and degreasing and sintering the stator green body and the rotor green body in sequence to obtain the screw drilling tool motor.
In a preferred scheme, in the mixture of the stator and the rotor, iron powder is mixed with binder=5-20:1 according to mass ratio.
According to the preferred scheme, the alloy raw material powder comprises, by mass, 20-50% of copper powder, 3-7% of tin powder, 20-60% of tungsten carbide powder, 1-10% of nickel powder, 1-6% of manganese powder and 1-15% of cobalt powder.
Further preferably, the alloy raw material powder comprises, by mass, 30-45% of copper, 4-7% of tin, 30-40% of tungsten carbide, 5-8% of nickel, 4-6% of manganese and 5-12% of cobalt.
In a preferred embodiment, the diamond micropowder has a particle diameter of 150 μm or less and the alloy raw material powder has a particle diameter of 100 μm or less.
In the preferable scheme, in the wear-resistant layer mixture, the mass ratio of the (diamond micro powder and alloy raw material powder) is (binder=5-20:1).
In a preferred scheme, in the wear-resistant layer mixture, the volume ratio of alloy raw material powder to diamond micro powder is 1-9:1.
According to the preferred scheme, the binding agent in the stator and rotor mixture and the wear-resistant layer mixture comprises, by volume, 30-50% of acrylic acid grafted polyethylene, 15-30% of paraffin, 20-50% of styrene-isoprene-styrene block copolymer and 5-15% of stearic acid.
According to the invention, the acrylic acid grafted polyethylene and the styrene-isoprene-styrene segmented copolymer are used as skeleton components of the binder, so that on one hand, the wire has flexibility, high elasticity and rigidity, and meanwhile, gradient degreasing temperatures are set according to different binder components in a degreasing process, so that a green body with high degreasing rate and relatively complete degreasing rate is obtained, the defect of degreasing defects such as cracks, collapse and the like caused by insufficient supporting force of a single binder in degreasing is avoided, stearic acid is used as a surfactant to wet metal powder, the coating capability of the binder on the metal powder is improved, paraffin is used as a lubricant to enable the wire to have good flowability, printing and forming are facilitated, and the composition of the binder is controlled within the range of the invention, so that the prepared wire has good flexibility, flowability and uniformity, and the green body with uniform performance is conveniently printed.
In the preferred scheme, in the process of obtaining the stator and rotor filaments and the wear-resistant layer filaments, the mixing temperature is 180-190 ℃, and the mixing time is 80-100 min.
In a preferred scheme, the diameters of the stator and rotor filaments and the wear-resistant layer filaments are 1.65-1.85 mm.
In the present invention, the uniformity of the extruded material from the nozzle can be sufficiently ensured by preparing the filaments first, and then performing melt extrusion molding.
In the preferred scheme, stator and rotor filars and wear-resistant layer filars are respectively arranged at double feed inlets corresponding to a double-nozzle FDM printer, a stator base body green body and a rotor base body green body are printed by one nozzle, and the wear-resistant layers arranged on the surfaces of the stator base body green body and the rotor base body green body are synchronously printed by the other nozzle.
The inventor finds that the wear-resistant layer and the matrix are integrally formed by adopting double-nozzle printing, and finally the performance of the screw drilling tool motor is optimal.
In the preferred scheme, in the printing process, the printing parameters are that the thickness of a printing layer is 0.1-0.3 mm, the temperature of a printing platform is 50-60 ℃, and the temperature of a printing nozzle is 180-200 ℃.
In the actual operation process, a stator matrix and a wear-resistant layer model thereof, a rotor matrix and a wear-resistant layer model thereof are established in three-dimensional modeling software, the models are imported into slicing software for printing parameter setting, a final file is imported into a double-nozzle FDM printer, printing is carried out according to the set parameters, and a stator green body and a rotor green body are obtained after printing and forming.
In a preferred scheme, the stator green body and the rotor green body are firstly placed in an organic solvent for solvent degreasing, and then are subjected to thermal degreasing in an argon atmosphere.
Further preferably, the organic solvent is cyclohexane, the degreasing temperature of the solvent is 60-80 ℃, and the degreasing time of the solvent is 4-6 h.
According to the preferable scheme, the thermal degreasing process comprises the steps of heating a degreasing furnace to 280-330 ℃ at a heating rate of 2-3 ℃ per minute, preserving heat for 1-2 hours, heating the degreasing furnace to 410-460 ℃ at a heating rate of 0.5-1 ℃ per minute, heating the degreasing furnace to 580-630 ℃ at a heating rate of 2-3 ℃ per minute, and preserving heat for 1-2 hours.
In the thermal degreasing process, the gradient heating mode is adopted for step degreasing based on the difference of pyrolysis temperature ranges of different components of the binder, so that the integrity of the green body and the removal effect of the binder in the green body can be effectively ensured, and the degreasing defect is avoided.
According to the preferred scheme, the sintering process is that the temperature is raised to 800-1000 ℃ at the temperature rising rate of 10-80 ℃ per minute, the temperature is kept for 8-15 min, and the sintering pressure is controlled to be 1-5 MPa.
The inventor finds that the sintering process needs to be controlled effectively, if the sintering temperature is too high, the diamond will graphitize and cannot play the roles of strong wear resistance and erosion resistance, and if the heat preservation time is insufficient, the diamond on the wear-resistant layer will be easy to fall off.
The beneficial effects obtained by the invention are as follows:
(1) By utilizing the 3D printing technology, a 2-5mm thick diamond wear-resistant layer is added on the outer surface of the rotor and the inner surface of the stator of the screw drilling tool motor, so that the wear resistance, erosion resistance and corrosion resistance of the screw drilling tool motor are enhanced, and the service life of the screw drilling tool is prolonged.
(2) The inner surface of the motor stator of the screw drilling tool is a diamond wear-resistant layer, so that the stator has high bearing capacity and high temperature resistance, and is suitable for drilling in a complex underground environment.
(3) The invention utilizes the 3D printing technology to manufacture the screw drilling tool motor with strong wear resistance and erosion resistance, effectively improves the preparation precision of the screw drilling tool motor, improves the production efficiency and reduces the manufacturing cost.
Drawings
Figure 1 is a schematic view of a stator,
Figure 2 is a schematic view of a rotor of the type shown in figure 2,
Figure 3 is a view of the engagement of the screw drill motor,
Fig. 4 is a cross-sectional view of a screw motor.
Detailed Description
The invention is described in further detail below with reference to the examples of the drawings.
Example 1
An example is a screw drilling tool motor with strong wear resistance and erosion resistance, which comprises a stator and a rotor, wherein the rotor has a large diameter of 79mm and a small diameter of 59mm, the stator has a large diameter of 90mm and a small diameter of 70mm, and the outer diameter of the stator is 120mm. The clearance distance from the outer surface of the rotor to the inner surface of the stator is 0.5mm, the heights of the stator and the rotor are 100mm, the screw pitches are 100mm, and the thicknesses of the diamond wear-resistant layers are 5mm.
The 3D printing manufacturing method of the screw drilling tool motor with strong wear resistance and erosion resistance comprises the following steps:
(1) The manufacturing method comprises the steps of preparing a wire, namely, a metal matrix is composed of iron powder, a wear-resistant layer is composed of metal alloy powder and diamond micropowder, the volume ratio of the metal alloy powder to the diamond micropowder is 9:1, wherein the wear-resistant layer contains 45% of copper powder, 7% of tin powder, 30% of tungsten carbide powder, 6% of nickel powder, 4% of manganese powder and 8% of cobalt powder, the granularity of the metal powder is 62-75 mu m, the granularity of the diamond micropowder is 75-100 mu m, the mass ratio of the powder to a binder is 20:1, the volume ratio of the binder is 50% of acrylic acid grafted polyethylene, 25% of styrene-isoprene-styrene block copolymer, 15% of paraffin and 10% of stearic acid, and the powder and the binder are calculated and weighed according to the design ratio.
Mixing the powder used by the matrix, the powder used by the wear-resistant layer and the binder uniformly, and placing into an internal mixer for internal mixing at 190 ℃ for 80min, wherein the purpose of internal mixing is to tightly combine the powder and the binder. And (3) after banburying, obtaining a mixed banburying material with plasticity, taking out and granulating, putting the obtained granules into a filament extruder for filament extrusion to obtain different composite filaments of 1.75+/-0.05 mm for printing a matrix and a wear-resistant layer, and finishing traction rolling on a traction machine.
(2) And (3) respectively establishing a stator matrix and a 5mm thick diamond wear-resistant layer model thereof and a rotor matrix and a 5mm thick diamond wear-resistant layer model thereof in UG (NX 12.0) modeling software, importing the model into slicing software, merging the matrix and the wear-resistant layer, setting a left nozzle printing matrix, a right nozzle printing diamond wear-resistant layer, setting a printing layer thickness of 0.2mm, filling degree of 100%, printing temperature of 200 ℃ and platform temperature of 60 ℃, slicing, setting and exporting a final file, importing the final file into a double nozzle FDM printer, printing according to the set parameters, and obtaining a stator green body and a rotor green body after printing.
(3) Degreasing, namely placing the stator green compact and the rotor green compact into a water bath heating pot for solvent degreasing, wherein cyclohexane is selected as a degreasing solvent, the degreasing temperature is 60 ℃, soaking is carried out for 6 hours, then, thermal degreasing is carried out in a degreasing furnace filled with argon, the temperature of the degreasing furnace is raised to 330 ℃ at the heating rate of 3 ℃ per minute, the temperature is kept for 1 hour, then, the temperature of the degreasing furnace is heated to 460 ℃ at the heating rate of 1 ℃ per minute, the temperature is kept for 1 hour, finally, the temperature of the degreasing furnace is heated to 630 ℃ at the heating rate of 3 ℃ per minute, and the temperature is kept for 1 hour, so that the purpose of degreasing is to remove binder components in the green compact.
(4) And sintering, namely placing the stator green compact and the rotor green compact into hot-pressing sintering equipment after degreasing, pressurizing to 5MPa, heating a sintering furnace to 950 ℃ from room temperature at a heating rate of 80 ℃ per minute, preserving heat for 8 minutes, and then cooling to complete sintering, thereby obtaining the screw drilling tool stator and rotor with strong wear resistance and erosion resistance. The prepared stator and rotor wear-resistant layer has the Vickers hardness of 1700hv, which is improved by about 800 compared with the Vickers hardness of the traditional chromium plating rotor, and the service life thereof exceeds 240 hours, which is improved by about 1.4 times compared with the traditional screw motor.
Example 2
The screw drilling tool motor with high wear resistance and erosion resistance comprises a stator and a rotor, wherein the major diameter of the rotor is 89.6mm, the minor diameter of the rotor is 73.6mm, the major diameter of the stator is 98mm, the minor diameter of the stator is 82mm, and the outer diameter of the stator is 120mm. The clearance distance from the outer surface of the rotor to the inner surface of the stator is 0.2mm, the heights of the stator and the rotor are 100mm, the screw pitches are 100mm, and the thicknesses of the diamond wear-resistant layers are 3mm.
(1) The manufacturing method comprises the steps of preparing a wire, namely, a metal matrix is composed of iron powder, a wear-resistant layer is composed of metal alloy powder and diamond micropowder, the volume ratio of the metal alloy powder to the diamond micropowder is 7:3, wherein the wear-resistant layer contains the metal alloy powder comprising, by mass, 39% of copper powder, 6% of tin powder, 40% of tungsten carbide powder, 5% of nickel powder, 5% of manganese powder and 5% of cobalt powder, the metal powder has the granularity of 62-75 mu m, the diamond micropowder has the granularity of 75-100 mu m, the mass ratio of the powder to a binder is 10:1, the volume ratio of the binder is 35% of acrylic acid grafted polyethylene, 20% of paraffin and 10% of stearic acid, and the powder and the binder are calculated and weighed according to the design ratio.
Mixing the powder used by the matrix, the powder used by the wear-resistant layer and the binder uniformly, and placing into an internal mixer for internal mixing at 185 ℃ for 90min, wherein the purpose of internal mixing is to tightly combine the powder and the binder. And (3) after banburying, obtaining a mixed banburying material with plasticity, taking out and granulating, putting the obtained granules into a filament extruder for filament extrusion to obtain different composite filaments of 1.75+/-0.05 mm for printing a matrix and a wear-resistant layer, and finishing traction rolling on a traction machine.
(2) And (3) respectively establishing a stator matrix and a 3mm thick diamond wear-resistant layer model thereof and a rotor matrix and a 3mm thick diamond wear-resistant layer model thereof in UG (NX 12.0) modeling software, importing the model into slicing software, merging the matrix and the wear-resistant layer, setting a left nozzle printing matrix, printing the diamond wear-resistant layer by a right nozzle, setting the thickness of a printing layer to be 0.2mm, filling the model to be 100%, printing the temperature of the printing nozzle to be 190 ℃ and the temperature of a platform to be 55 ℃, slicing the printing matrix, exporting a final file, importing the final file into a double nozzle FDM printer, printing according to the set parameters, and obtaining a stator green body and a rotor green body after printing.
(3) Degreasing, namely placing the stator green body and the rotor green body in a water bath heating pot for solvent degreasing, wherein cyclohexane is selected as a degreasing solvent, the degreasing temperature is 70 ℃, soaking is carried out for 5 hours, then, the thermal degreasing is carried out in a degreasing furnace filled with argon, the temperature of the degreasing furnace is raised to 300 ℃ at a heating rate of 2.5 ℃ per minute, the temperature is kept for 1 hour, then, the temperature of the degreasing furnace is heated to 440 ℃ at a heating rate of 0.8 ℃ per minute, the temperature is kept for 1 hour, finally, the temperature of the degreasing furnace is heated to 600 ℃ at a heating rate of 2.5 ℃ per minute, and the temperature is kept for 1 hour, so that the binder components in the green body are removed.
(4) And sintering, namely placing the stator green compact and the rotor green compact into hot-pressing sintering equipment after degreasing, pressurizing to 3MPa, heating a sintering furnace to 900 ℃ from room temperature at a heating rate of 40 ℃ per minute, preserving heat for 12 minutes, and then cooling to complete sintering, thereby obtaining the screw drilling tool stator and rotor with strong wear resistance and erosion resistance. The prepared stator and rotor wear-resistant layer has the Vickers hardness of 2000hv, which is improved by about 1100 compared with the Vickers hardness of the traditional chromium plating rotor, the service life of the stator and rotor wear-resistant layer can exceed 300 hours, and the service life of the stator and rotor wear-resistant layer is improved by 2 times compared with the traditional screw motor.
Example 3
The screw drilling tool motor with high wear resistance and erosion resistance comprises a stator and a rotor, wherein the rotor has a large diameter of 79.8mm and a small diameter of 47.8mm, the stator has a large diameter of 96mm and a small diameter of 64mm, and the outer diameter of the stator is 120mm. The clearance distance from the outer surface of the rotor to the inner surface of the stator is 0.1mm, the heights of the stator and the rotor are 100mm, the screw pitches are 100mm, and the thicknesses of the diamond wear-resistant layers are 2mm.
(1) The manufacturing method comprises the steps of preparing a wire, namely, a metal matrix is composed of iron powder, a wear-resistant layer is composed of metal alloy powder and diamond micropowder, the volume ratio of the metal alloy powder to the diamond micropowder is 1:1, wherein the wear-resistant layer contains the metal alloy powder comprising, by mass, 30% of copper powder, 4% of tin powder, 40% of tungsten carbide powder, 8% of nickel powder, 6% of manganese powder and 12% of cobalt powder, the metal powder has the granularity of 62-75 mu m, the diamond micropowder has the granularity of 75-100 mu m, the mass ratio of the powder to a binder is 5:1, the volume ratio of the binder is 30% of acrylic acid grafted polyethylene, 30% of styrene-isoprene-styrene block copolymer, 15% of paraffin and 15% of stearic acid, and the powder and the binder are calculated and weighed according to the design ratio.
Mixing the powder used by the matrix, the powder used by the wear-resistant layer and the binder uniformly, and placing into an internal mixer for internal mixing at 180 ℃ for 100min, wherein the purpose of internal mixing is to tightly combine the powder and the binder. And (3) after banburying, obtaining a mixed banburying material with plasticity, taking out and granulating, putting the obtained granules into a filament extruder for filament extrusion to obtain different composite filaments of 1.75+/-0.05 mm for printing a matrix and a wear-resistant layer, and finishing traction rolling on a traction machine.
(2) And (3) respectively establishing a stator matrix and a 2mm thick diamond wear-resistant layer model thereof and a rotor matrix and a 2mm thick diamond wear-resistant layer model thereof in UG (NX 12.0) modeling software, importing the model into slicing software, merging the matrix and the wear-resistant layer, setting a left nozzle printing matrix, printing the diamond wear-resistant layer by a right nozzle, setting the thickness of a printing layer to be 0.2mm, filling the printing nozzle to be 100%, printing the temperature of the printing nozzle to be 180 ℃ and the temperature of a platform to be 50 ℃, slicing the printing matrix, exporting a final file, importing the final file into a double nozzle FDM printer, printing according to the set parameters, and obtaining a stator green body and a rotor green body after printing.
(3) Degreasing, namely placing the stator green compact and the rotor green compact in a water bath heating pot for solvent degreasing, wherein the degreasing solvent is cyclohexane, the degreasing temperature is 80 ℃, soaking for 4 hours, then performing thermal degreasing in a degreasing furnace filled with argon, heating the degreasing furnace to the room temperature of 280 ℃ at the heating rate of 2 ℃ per minute, preserving heat for 1 hour, then heating the degreasing furnace to the room temperature of 410 ℃ at the heating rate of 0.5 ℃ per minute, preserving heat for 1 hour, and finally heating the degreasing furnace to the room temperature of 580 ℃ at the heating rate of 2 ℃ per minute, preserving heat for 1 hour, wherein the degreasing aims at removing binder components in the green compact.
(4) And sintering, namely placing the stator green compact and the rotor green compact into hot-pressing sintering equipment after degreasing, pressurizing to 3MPa, heating a sintering furnace to 860 ℃ from room temperature at a heating rate of 20 ℃ per minute, preserving heat for 15 minutes, and then cooling to complete sintering, thereby obtaining the screw drilling tool stator and rotor with strong wear resistance and erosion resistance. The prepared stator and rotor wear-resistant layer has the Vickers hardness of 1400hv, which is improved by about 500 compared with the Vickers hardness of the traditional chromium plating rotor, and the service life thereof can exceed 200 hours, which is improved by 1 time compared with the service life of the traditional screw motor.
Comparative example 1
Other conditions were the same as in example 1, except that the sintering temperature exceeded 1000 ℃, and it was found that graphitization occurred in diamond on the wear layer of the sintered stator and rotor.
Comparative example 2
Otherwise, the conditions were the same as in example 3, except that the solvent degreasing time was less than 4 hours, and the green body was not completely degreased, and defects such as voids were found in the sintered stator and rotor.
Claims (6)
1. The preparation method of the screw drilling tool motor with strong wear resistance and erosion resistance is characterized by mixing iron powder and a bonding agent to obtain a stator and rotor mixture, mixing the stator and rotor mixture, granulating, drawing wires to obtain a stator and rotor wire stock, mixing diamond micropowder, alloy raw material powder and the bonding agent according to a designed proportion to obtain a wear-resistant layer mixture, mixing the wear-resistant layer mixture, granulating, drawing wires to obtain a wear-resistant layer wire stock, printing the stator and rotor wire stock to obtain a stator base green body and a rotor base green body respectively, printing the wear-resistant layer wire stock on the surface of the stator base green body to obtain a stator green body, printing the wear-resistant layer wire stock on the surface of the rotor base green body to obtain a rotor green body, degreasing and sintering the stator green body and the rotor green body in sequence to obtain the screw drilling tool motor;
The alloy raw material powder comprises, by mass, 20-50% of copper powder, 3-7% of tin powder, 20-60% of tungsten carbide powder, 1-10% of nickel powder, 1-6% of manganese powder and 1-15% of cobalt powder;
The binding agent in the stator and rotor mixture and the wear-resistant layer mixture comprises, by volume, 30-50% of acrylic acid grafted polyethylene, 15-30% of paraffin, 20-50% of a styrene-isoprene-styrene block copolymer and 5-15% of stearic acid;
The stator green compact and the rotor green compact are firstly placed in an organic solvent for solvent degreasing, and then are subjected to thermal degreasing in an argon atmosphere;
The organic solvent is cyclohexane, the degreasing temperature of the solvent is 60-80 ℃, and the degreasing time of the solvent is 4-6 h;
The thermal degreasing process comprises the steps of heating a degreasing furnace to 280-330 ℃ at a heating rate of 2-3 ℃ per minute, preserving heat for 1-2 hours, heating the degreasing furnace to 410-460 ℃ at a heating rate of 0.5-1 ℃ per minute, heating the degreasing furnace to 580-630 ℃ at a heating rate of 2-3 ℃ per minute, and preserving heat for 1-2 hours;
The screw drilling tool motor comprises a stator and a rotor, wherein the stator consists of a stator matrix and a diamond wear-resistant layer A arranged on the inner surface of the stator matrix, the rotor consists of a rotor matrix and a diamond wear-resistant layer B arranged on the outer surface of the rotor matrix, the diamond wear-resistant layer A and the diamond wear-resistant layer B are both composed of alloy and diamond, and the thicknesses of the diamond wear-resistant layer A and the diamond wear-resistant layer B are 2-5 mm;
in the diamond wear-resistant layer A and the diamond wear-resistant layer B, the volume ratio of the alloy to the diamond is 1-9:1, and the alloy comprises 20-50% of copper, 3-7% of tin, 20-60% of tungsten carbide, 1-10% of nickel, 1-6% of manganese and 1-15% of cobalt.
2. The method for preparing the screw drilling tool motor with strong wear resistance and erosion resistance according to claim 1, wherein the method comprises the following steps:
In the stator and rotor mixture, the mass ratio of the iron powder to the binding agent=5-20:1;
The grain diameter of the diamond micro powder is less than or equal to 150 mu m, and the grain diameter of the alloy raw material powder is less than or equal to 100 mu m;
in the wear-resistant layer mixture, the mass ratio of (diamond micro powder and alloy raw material powder) is (binding agent=5-20:1;
In the wear-resistant layer mixture, the volume ratio of alloy raw material powder to diamond micro powder is 1-9:1.
3. The method for preparing the screw drilling tool motor with strong wear resistance and erosion resistance according to claim 1, wherein in the process of obtaining the stator and rotor filars and the wear-resistant layer filars, the mixing temperature is 180-190 ℃, and the mixing time is 80-100 min;
the diameters of the stator and rotor filaments and the wear-resistant layer filaments are 1.65-1.85 mm.
4. The method for preparing the motor of the screw drilling tool with strong wear resistance and erosion resistance according to claim 1, wherein the stator and rotor filiform materials and the wear-resistant layer filiform materials are respectively arranged at double feed inlets corresponding to a double-nozzle FDM printer, a stator matrix green body and a rotor matrix green body are printed by one nozzle, and the wear-resistant layers arranged on the surfaces of the stator matrix green body and the rotor matrix green body are synchronously printed by the other nozzle;
In the printing process, the printing parameters are that the thickness of a printing layer is 0.1-0.3 mm, the temperature of a printing platform is 50-60 ℃, and the temperature of a printing nozzle is 180-200 ℃.
5. The method for preparing the screw drilling tool motor with strong wear resistance and erosion resistance according to claim 1, wherein the method comprises the following steps:
The sintering process is that the temperature is raised to 800-1000 ℃ at the temperature rising rate of 10-80 ℃ per minute, the temperature is kept for 8-15 min, and the sintering pressure is controlled to be 1-5 MPa.
6. The method for preparing the screw drilling tool motor with strong wear resistance and erosion resistance according to claim 1, wherein the stator matrix and the rotor matrix are made of iron;
The rotor is positioned in the inner cavity of the stator, the distance from the outer surface of the rotor to the inner surface of the stator is 0.1-0.5 mm, and the rotor and the stator are in clearance fit in a matching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310089960.9A CN115977864B (en) | 2023-02-09 | 2023-02-09 | Screw drilling tool motor with strong wear resistance and erosion resistance and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310089960.9A CN115977864B (en) | 2023-02-09 | 2023-02-09 | Screw drilling tool motor with strong wear resistance and erosion resistance and preparation method |
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| CN116771268A (en) * | 2023-07-17 | 2023-09-19 | 盐城市新永佳石油机械制造有限公司 | A high-temperature and high-pressure screw drilling tool and its processing technology |
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| CN101115584A (en) * | 2004-12-30 | 2008-01-30 | 3M创新有限公司 | Abrasive article and method of manufacture |
| CN103388451A (en) * | 2012-05-11 | 2013-11-13 | 天津市闻达石油钻采工程装备有限公司 | Ultrahigh-temperature screw drill |
| CN108907180A (en) * | 2018-08-08 | 2018-11-30 | 美轲（广州）化学股份有限公司 | Binder, metal injection molded feeding, metal parts and preparation method thereof |
| CN115255351A (en) * | 2022-07-12 | 2022-11-01 | 中南大学 | Diamond-metal matrix three-dimensional forming composite material, wire material, preparation thereof and application thereof in FDM printing |
| CN115354959A (en) * | 2022-08-25 | 2022-11-18 | 盐城市新永佳石油机械制造有限公司 | Anti-sticking non-magnetic screw drill and production process thereof |
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| US6056794A (en) * | 1999-03-05 | 2000-05-02 | 3M Innovative Properties Company | Abrasive articles having bonding systems containing abrasive particles |
| US6669745B2 (en) * | 2001-02-21 | 2003-12-30 | 3M Innovative Properties Company | Abrasive article with optimally oriented abrasive particles and method of making the same |
| US7832456B2 (en) * | 2006-04-28 | 2010-11-16 | Halliburton Energy Services, Inc. | Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools |
| JP2019188744A (en) * | 2018-04-27 | 2019-10-31 | 第一セラモ株式会社 | Composition for three-dimensional printer |
| CN115213413A (en) * | 2021-06-18 | 2022-10-21 | 河南四方达超硬材料股份有限公司 | Composite superhard part and production process thereof |
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| CN101115584A (en) * | 2004-12-30 | 2008-01-30 | 3M创新有限公司 | Abrasive article and method of manufacture |
| CN103388451A (en) * | 2012-05-11 | 2013-11-13 | 天津市闻达石油钻采工程装备有限公司 | Ultrahigh-temperature screw drill |
| CN108907180A (en) * | 2018-08-08 | 2018-11-30 | 美轲（广州）化学股份有限公司 | Binder, metal injection molded feeding, metal parts and preparation method thereof |
| CN115255351A (en) * | 2022-07-12 | 2022-11-01 | 中南大学 | Diamond-metal matrix three-dimensional forming composite material, wire material, preparation thereof and application thereof in FDM printing |
| CN115354959A (en) * | 2022-08-25 | 2022-11-18 | 盐城市新永佳石油机械制造有限公司 | Anti-sticking non-magnetic screw drill and production process thereof |
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