CN112723895A - alpha-SiAlON ceramic numerical control lathe tool and preparation method thereof - Google Patents
alpha-SiAlON ceramic numerical control lathe tool and preparation method thereof Download PDFInfo
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- CN112723895A CN112723895A CN202011600002.6A CN202011600002A CN112723895A CN 112723895 A CN112723895 A CN 112723895A CN 202011600002 A CN202011600002 A CN 202011600002A CN 112723895 A CN112723895 A CN 112723895A
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- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
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Abstract
The application belongs to the technical field of ceramic materials, and particularly relates to an alpha-SiAlON ceramic numerical control turning tool and a preparation method thereof. The application provides a preparation method of an alpha-SiAlON ceramic numerical control lathe tool, which comprises the steps of mixing alpha-SiAlON ceramic powder, any one or more of PPTTA, HDDA, BPA2EODMA and TMPTA, Irgacure819 and/or Irgacure369 and a dispersing agent, dispersing, ball-milling, photocuring, printing and forming by 3D, degreasing and sintering to obtain the alpha-SiAlON ceramic numerical control lathe tool; the application provides the alpha-SiAlON ceramic numerical control turning tool and the preparation method thereof, which can effectively solve the problem that the alpha-SiAlON ceramic tool with complex surface patterns and chip breaker groove structures cannot be efficiently and precisely prepared by machining, and can quickly meet the requirements of individuation and complex shape customization under the condition of extremely many tool varieties.
Description
Technical Field
The application belongs to the technical field of ceramic materials, and particularly relates to an alpha-SiAlON ceramic numerical control turning tool and a preparation method thereof.
Background
The alpha-SiAlON ceramic has the advantages of high hardness, wear resistance, thermal shock resistance, oxidation resistance and the like, is one of ideal high-temperature structural materials, and can be used for well processing cast iron and nickel-based high-temperature alloy.
The existing alpha-SiAlON ceramic cutting tool is divided into two types of molding and sintering processes, one is to sinter the alpha-SiAlON ceramic into a fixed shape by hot pressing and then machine the alpha-SiAlON ceramic cutting tool into an alpha-SiAlON ceramic cutting tool with a certain shape by later-stage machining; the other method is to shape the alpha-SiAlON ceramic powder in an isostatic pressing mode, then sinter the powder in a pressureless sintering or air pressure sintering mode, and finally obtain the alpha-SiAlON ceramic cutter through machining. In the existing process for preparing the alpha-SiAlON ceramic cutter, the alpha-SiAlON ceramic cutter with complex shapes such as circular arc cutting edges, chip breakers, surface patterns and the like is extremely difficult to machine or can not be machined completely due to the high hardness, wear resistance, thermal shock resistance and oxidation resistance of the alpha-SiAlON ceramic cutter, and the mechanical machining of the alpha-SiAlON ceramic cutter has low precision, low efficiency and high cost; and the current cutters are extremely various, and the customization requirements of personalized and complex-shaped cutters cannot be met.
Disclosure of Invention
In view of the above, the application provides an alpha-SiAlON ceramic numerical control turning tool and a preparation method thereof, which are used for solving the technical problem that an alpha-SiAlON ceramic tool with complex surface patterns and chip breaker groove structures cannot be efficiently and precisely prepared by machining.
The application provides a preparation method of an alpha-SiAlON ceramic numerical control lathe tool in a first aspect, which comprises the following steps:
step 3, performing photocuring 3D printing molding on the second ceramic slurry to obtain an alpha-SiAlON ceramic numerical control lathe tool blank;
step 4, degreasing, sintering and cooling the alpha-SiAlON ceramic numerical control lathe tool biscuit body to obtain an alpha-SiAlON ceramic numerical control lathe tool with an arc cutting edge, a chip breaker groove and surface patterns;
the photosensitive resin is one or more of PPTTA, HDDA, BPA2EODMA and TMPTA;
the photoinitiator is one or two of Irgacure819 and Irgacure 369.
Preferably, the alpha-SiAlON ceramic powder is doped with one or more rare earth cations with radius smaller than
The rare earth oxide of (1);
the rare earth metal oxide is yttrium oxide, ytterbium oxide or dysprosium oxide.
Preferably, the sintering is hot isostatic pressing sintering, hot pressing sintering in a nitrogen atmosphere, pressure sintering in a protective atmosphere, spark plasma sintering or microwave sintering.
Preferably, the step 2 specifically comprises:
and placing the second ceramic slurry into a trough of a photocuring 3D printer, leveling the second ceramic slurry by a scraper, slicing the three-dimensional model of the alpha-SiAlON ceramic numerical control lathe tool by a computer, curing by ultraviolet light to obtain a single-layer alpha-SiAlON ceramic numerical control lathe tool blank, and continuing curing by the single-layer ultraviolet light to obtain the alpha-SiAlON ceramic numerical control lathe tool blank.
Preferably, the degreasing is specifically as follows:
and (3) placing the alpha-SiAlON ceramic numerical control turning tool blank in a muffle furnace, raising the temperature to 400-plus-500 ℃ at the heating rate of 0.25-1 ℃/min, and preserving the temperature for 2h for air degreasing.
Preferably, before the air degreasing, the alpha-SiAlON ceramic numerical control turning tool blank is placed in a tube furnace, the temperature is raised to 500-600 ℃ at the heating rate of 0.5-2 ℃/min, and the temperature is kept for 2h for vacuum degreasing or nitrogen atmosphere degreasing.
Preferably, the method further comprises the step 5: the coating is prepared on the surface of the alpha-SiAlON ceramic numerical control lathe tool by a physical vapor deposition process or a chemical vapor deposition method.
Preferably, the coating is an alumina coating.
The second aspect of the application provides an alpha-SiAlON ceramic numerical control lathe tool.
Compared with the prior art, the method has the following beneficial effects.
1. Compared with the alpha-SiAlON ceramic numerical control lathe tool prepared by machining, the method reduces the later part machining allowance, reduces the machining time and improves the efficiency by photocuring 3D printing and forming.
2. The first ceramic slurry obtained by using any one or more of PPTA, HDDA, BPA2EODMA and TMPTA as photosensitive resin and adding Irgacure819 and Irgacure369 which have high solubility and low mobility in PPTA, HDDA, BPA2EODMA and TMPTA as photoinitiators has the characteristics of low viscosity, high curing speed, low curing shrinkage and good cured film flexibility.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a view of an alpha-SiAlON ceramic numerical control lathe tool model prepared in an embodiment of the application;
FIG. 2 is a view of an alpha-SiAlON ceramic numerical control lathe tool model A-A prepared in an embodiment of the application;
FIG. 3 is a schematic diagram of a numerical control turning tool made of a ceramic material having a model of DNMG 120408 α -SiAlON according to an embodiment of the present disclosure;
in the figure: the turning tool comprises a turning tool body 1, a circular arc edge 2, a chip breaker groove 3, a circular assembling hole 4, a chip bevel transition circular arc radius R3, a chip bevel transition circular arc radius L1 is 12mm, an chip bevel transition circular arc radius L2 is 10mm, an chip bevel transition circular arc radius R0 is 0.8mm, an chip bevel transition circular arc radius H is 4mm, an alpha 1 is 55 degrees, an chip bevel transition circular arc radius L3 is 1-4 mm, an chip bevel transition circular arc radius LA is 0.2-0.5 mm, a chip bevel transition circular arc radius phi 2 is 10-45 degrees, and a chip bevel transition circular arc radius phi 3 is 10-45 degrees.
Detailed Description
The application provides an alpha-SiAlON ceramic numerical control turning tool and a preparation method and application thereof, which are used for solving the technical problem that the alpha-SiAlON ceramic cutting tool with complex surface patterns and chip breaker groove structures cannot be efficiently and precisely prepared by machining.
The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
The embodiment 1 of the application provides a first preparation method of an alpha-SiAlON ceramic numerical control turning tool, which specifically comprises the following steps:
step 1: respectively weighing PPTA and HDDA as photosensitive resins, uniformly mixing, and then adding a photoinitiator Irgacure819, alpha-SiAlON ceramic powder and a BYK9077 dispersant to obtain first ceramic slurry, wherein the mass ratio of PPTA to HDDA is 80:20, the mass ratio of Irgacure819 to photosensitive resins is 1:100, the mass ratio of alpha-SiAlON ceramic powder to first ceramic slurry is 50:100, and the mass ratio of BYK9077 dispersant to first ceramic slurry is 1: 100;
the first ceramic slurry obtained by selecting PPTA and HDDA as photosensitive resin and adding Irgacure819 and Irgacure369 which have high solubility and low mobility in PPTA and HDDA as photoinitiators has the characteristics of low viscosity, high curing speed, low curing shrinkage and good flexibility of a cured film;
step 2: and dispersing the first ceramic slurry by using a homogenizer, pouring the first ceramic slurry dispersed by the homogenizer into a ball milling tank, and adding a certain amount of tungsten carbide steel balls. Ball-milling by using a planetary ball mill to obtain second ceramic slurry, wherein the rotating speed of a homogenizer is 2500 r-3000/min per section, the rotating time is 1-2 min, the ball-milling rotation speed is 300-400 r/min, and the ball-milling time is set to be 2-6 h;
and step 3: placing the second ceramic slurry into a material groove of a photocuring 3D printer, and numerically controlling the alpha-SiAlON ceramic with the required complex shapeThe three-dimensional model of the cutter is sliced by a computer, the thickness of the slice layer is set to be 20um as shown in figure 1, then slurry is leveled by a scraper and solidified by ultraviolet light to obtain a single-layer alpha-SiAlON ceramic numerical control lathe tool blank, the ultraviolet light is continuously solidified layer by layer, and finally the alpha-SiAlON ceramic numerical control lathe tool blank with complex shapes such as arc blade, chip breaker, surface pattern and the like is printed, wherein the exposure power of the ultraviolet light solidification is 10mw/cm2The exposure time is 20-40 s, and the thickness of the single-layer alpha-SiAlON ceramic numerical control lathe tool blank is 20 um;
the three-dimensional model of the alpha-SiAlON ceramic numerical control lathe tool can be set individually according to needs, the constraint of a conventional mechanical die is eliminated, the three-dimensional model can be set into any complex shape, the later part machining allowance is reduced, the machining time and the machining cost are reduced, and the machining efficiency is improved;
and 4, step 4: placing the alpha-SiAlON ceramic numerical control lathe tool blank in a vacuum tube furnace for vacuum atmosphere degreasing, and then placing the blank in a muffle furnace for air degreasing, wherein the temperature rise speed of vacuum degreasing is 0.5-2 ℃/min, the maximum degreasing temperature is 500 ℃, and the heat preservation time of the maximum degreasing temperature is 2 h; wherein the heating rate of air degreasing is 0.5-2 ℃/min, the maximum degreasing temperature is 500 ℃, and the maximum degreasing time is 2 h;
and 5: placing the degreased alpha-SiAlON ceramic numerical control lathe tool blank in the step 4 in a graphite crucible in a pressureless sintering furnace filled with high-purity nitrogen for sintering, wherein the air pressure of the high-purity nitrogen is 0.1MPa, the sintering temperature is increased from room temperature to 1200 ℃, and the temperature increasing speed is 10-15 ℃/min; setting the heating rate to be 10-15 ℃/min when the temperature rise middle temperature section is 1200-1500 ℃; when the medium-high temperature point is set to be 1500 ℃, the temperature is kept for 1-3 h; when the temperature is set to be 1500-1800 ℃, the temperature rising speed is limited to be 5-10 ℃/min; the sintering highest temperature is 1800 ℃, and the heat preservation time is 1-3 h; in the temperature reduction stage, the temperature is 1800-1200 ℃, and the temperature reduction speed is limited to 10-15 ℃/min; when the temperature is lower than 1200 ℃, the alpha-SiAlON ceramic numerical control turning tool with excellent hardness, wear resistance, thermal shock resistance and oxidation resistance is obtained by furnace cooling.
The embodiment of the application selects PPTA and HDDA as photosensitive resin, and also adds Irgacure819 and Irgacure369 which are high in solubility and low in mobility in PPTA and HDDA as photoinitiators to obtain first ceramic slurry, so that the first ceramic slurry has the characteristics of low viscosity, high curing speed, low curing shrinkage and good flexibility of a cured film, and in the process of preparing the alpha-SiAlON ceramic numerical control lathe tool through photocuring 3D printing and forming, the photocuring efficiency is improved, and the problem of low precision of complex shapes such as arc cutting edges, chip breakers and surface patterns on the alpha-SiAlON ceramic tool caused by low curing speed and high curing shrinkage of the second ceramic slurry is solved.
Example 2:
the embodiment 2 of the application provides a second preparation method of an alpha-SiAlON ceramic numerical control turning tool, which specifically comprises the following steps:
step 1: PPTTA and HDDA are respectively weighed as photosensitive resin, and after being uniformly mixed, the photoinitiator Irgacure819 and rare earth-doped cation with radius smaller than
The first ceramic slurry is obtained from the yttrium oxide metal ion alpha-SiAlON ceramic powder and a BYK9077 dispersing agent, wherein the mass ratio of PPTTA to HDDA is 80:20, the mass ratio of Irgacure819 to photosensitive resin is 1:100, the mass ratio of the alpha-SiAlON ceramic powder to the first ceramic slurry is 50:100, and the mass ratio of the BYK9077 dispersing agent to the first ceramic slurry is 1: 100;
the radius of rare earth cation doped in the alpha-SiAlON ceramic powder is less
The yttrium oxide metal ions can effectively change the crystal habit of the alpha-SiAlON ceramic, so that part of equiaxed crystals are converted into long columnar crystals, the self-toughening effect is realized, and the fracture toughness of the alpha-SiAlON ceramic is effectively improved;
step 2: and dispersing the first ceramic slurry by using a homogenizer, pouring the first ceramic slurry dispersed by the homogenizer into a ball milling tank, and adding a certain amount of tungsten carbide steel balls. Ball-milling by using a planetary ball mill to obtain second ceramic slurry, wherein the rotating speed of a homogenizer is 2500 r-3000/min per section, the rotating time is 1-2 min, the ball-milling rotation speed is 300-400 r/min, and the ball-milling time is set to be 2-6 h;
and step 3: placing the second ceramic slurry into a material groove of a photocuring 3D printer, slicing a three-dimensional model of the alpha-SiAlON ceramic numerical control lathe tool with a required complex shape by a computer, setting the thickness of a slice layer to be 20 mu m as shown in figure 1, leveling the slurry by a scraper to obtain a single-layer alpha-SiAlON ceramic numerical control lathe tool blank with the thickness of 20 mu m, and finally printing the alpha-SiAlON ceramic numerical control lathe tool blank with complex shapes such as an arc blade, a chip breaker groove, surface patterns and the like through ultraviolet light layer-by-layer curing, wherein the exposure power of the ultraviolet light curing is 10mw/cm2The exposure time is 20-40 s;
the three-dimensional model of the alpha-SiAlON ceramic numerical control lathe tool can be set individually according to needs, the constraint of a conventional mechanical die is eliminated, the three-dimensional model can be set into any complex shape, the later part machining allowance is reduced, the machining time and the machining cost are reduced, and the machining efficiency is improved;
and 4, step 4: placing the alpha-SiAlON ceramic numerical control lathe tool blank in a vacuum tube furnace for vacuum atmosphere degreasing, and then placing the blank in a muffle furnace for air degreasing, wherein the temperature rise speed of vacuum degreasing is 0.5-2 ℃/min, the maximum degreasing temperature is 500 ℃, and the heat preservation time of the maximum degreasing temperature is 2 h; wherein the heating rate of air degreasing is 0.5-2 ℃/min, the maximum degreasing temperature is 500 ℃, and the maximum degreasing time is 2 h;
and 5: placing the degreased alpha-SiAlON ceramic numerical control lathe tool blank in the step 4 in a graphite crucible in a pressureless sintering furnace filled with high-purity nitrogen for sintering, wherein the air pressure of the high-purity nitrogen is 0.1MPa, the sintering temperature is increased from room temperature to 1200 ℃, and the temperature increasing speed is 10-15 ℃/min; setting the heating rate to be 10-15 ℃/min when the temperature rise middle temperature section is 1200-1500 ℃; when the medium-high temperature point is set to be 1500 ℃, the temperature is kept for 1-3 h; when the temperature is set to be 1500-1800 ℃, the temperature rising speed is limited to be 5-10 ℃/min; the sintering highest temperature is 1800 ℃, and the heat preservation time is 1-3 h; in the temperature reduction stage, the temperature is 1800-1200 ℃, and the temperature reduction speed is limited to 10-15 ℃/min; when the temperature is lower than 1200 ℃, the alpha-SiAlON ceramic numerical control turning tool with excellent hardness, wear resistance, thermal shock resistance and oxidation resistance is obtained by furnace cooling.
Step 6, after the sintered alpha-SiAlON ceramic numerical control lathe tool is subjected to finishing, polishing, dry or wet sand blasting and cleaning treatment, the PVD technology is utilized to prepare Al on the surface of the ceramic lathe tool2O3Coating, the thickness of the prepared alumina coating is 5-10 μm.
It is noted that Al is prepared on the surface of the alpha-SiAlON ceramic numerical control lathe tool2O3The coating improves the high-temperature stability of the alpha-SiAlON ceramic numerical control lathe tool, so that the alpha-SiAlON ceramic numerical control lathe tool still has high wear resistance and high red hardness at high temperature.
Because alpha-SiAlON ceramic numerical control lathe tool is often used for cutting parts at high temperature and high speed, the alpha-SiAlON ceramic numerical control lathe tool is easy to wear and break, and the service life is short, in the embodiment of the application, one or more rare earth cations are doped in alpha-SiAlON ceramic powder, and the radius is smaller than
The rare earth oxide improves the fracture toughness of the alpha-SiAlON ceramic numerical control lathe tool, avoids the alpha-SiAlON ceramic numerical control lathe tool from being easily fractured in the process of cutting parts at high temperature and high speed, and prepares Al on the surface of the alpha-SiAlON ceramic numerical control lathe tool2O3The coating improves the stability of the alpha-SiAlON ceramic numerical control lathe tool at high temperature and reduces the abrasion of the alpha-SiAlON ceramic numerical control lathe tool.
Example 3
Compared with the embodiment 1 or 2, in the embodiment, the photosensitive resin monomers are BPA2EODMA and HDDA which are respectively weighed according to the mass fractions of 80% and 20%, and are uniformly mixed.
Example 4:
compared with the embodiment 1 or 2, in the embodiment, the photosensitive resin monomers are BPA2EODMA and TMPTA which are respectively weighed according to the mass fractions of 80% and 20%, and are uniformly mixed.
Example 5:
in this example, the solid content of the ceramic particles was 70% by mass of the slurry (relative to the ceramic slurry) in terms of percentage, as compared with example 1 or 2.
Example 6:
compared with the embodiment 1 or 2, in the embodiment, the photoinitiator accounts for 2 wt% of the mass of the photosensitive resin, and the type-to-mass ratio of the photoinitiator is Irgacure 819: irgacure369 ═ 1: 1.
example 7:
in this example, the dispersant BYK9077 was added in an amount of 3% by mass based on the mass of the ceramic powder, as compared with example 1 or 2.
Example 8:
compared with the embodiment 1 or 2, in the embodiment, the kind and the mass ratio of the added dispersant are BYK9077: BYK9096 which is 1: 1;
the used dispersing equipment is a planetary ball mill, the self-rotating speed of the ball mill is 400r/min, and the ball milling time is 4-6 h.
Example 9:
compared with the embodiment 1 or 2, in the embodiment, the exposure power of the surface of the photocuring 3D printer is 20-50 mw/cm2, and the single-layer exposure time is 5-20 s.
Example 10:
in contrast to example 1 or 2, in this example, the degreasing method used was two-step degreasing, in which the first-step degreasing method used nitrogen atmosphere degreasing using a tube furnace filled with 0.1MPa nitrogen.
Example 11:
compared with the embodiment 1 or 2, the degreasing method used in the embodiment is two-step degreasing, wherein the temperature rising rate of the degreasing in the first step is 0.5-2 ℃, the maximum temperature is 500-600 ℃, and the maximum temperature holding time is 2 hours.
Example 12:
compared with the embodiment 1 or 2, the degreasing method used in the embodiment is one-step air degreasing, wherein the degreasing temperature rise speed is limited to 0.25-1 ℃/min, the maximum degreasing temperature is 400-500 ℃, and the maximum temperature holding time is 2 h.
Example 13:
compared with the embodiment 1 or 2, in the embodiment, a period of heat preservation is set at the middle-high temperature point 1600 ℃ in the sintering, and the heat preservation time is 1-3 h.
Example 14:
compared with the embodiment 1 or 2, in the embodiment, the highest temperature point during sintering is 1900 ℃, and the heat preservation time of the highest sintering temperature is 1-2 h.
Example 15:
in this example, the coating is Al, compared to example 1 or 22O3And TiB2The composite coating of (1).
Comparative example 1:
this comparison provides a third method for preparing an alpha-SiAlON ceramic numerically controlled lathe tool, which specifically comprises the steps of:
step 1: PPTA and HDDA are weighed respectively and used as photosensitive resin to be mixed with BYK9077 dispersant and alpha-SiAlON ceramic powder to obtain first ceramic slurry, wherein the mass ratio of PPTA to HDDA is 80:20, and the mass ratio of alpha-SiAlON ceramic powder to the first ceramic slurry is 50: 100.
Step 2: and dispersing the first ceramic slurry by using a homogenizer, pouring the first ceramic slurry dispersed by the homogenizer into a ball milling tank, and adding a certain amount of tungsten carbide steel balls. Ball-milling by using a planetary ball mill to obtain second ceramic slurry, wherein the rotating speed of a homogenizer is 2500 r-3000/min per section, the rotating time is 1-2 min, the ball-milling rotation speed is 300-400 r/min, and the ball-milling time is set to be 2-6 h;
and step 3: placing the second ceramic slurry into a material groove of a photocuring 3D printer, slicing a three-dimensional model of an alpha-SiAlON ceramic numerical control lathe tool with a required complex shape by a computer, setting the thickness of a slice layer to be 20 mu m, leveling the slurry by a scraper, and then carrying out exposure with the exposure power of 10mw/cm2After exposure time is 40s, the alpha-SiAlON ceramic numerical control lathe tool blank with the single-layer thickness of 20um cannot be obtained through solidification, after exposure time is 60s, the alpha-SiAlON ceramic numerical control lathe tool blank with the single-layer thickness of 20um is obtained, and ultraviolet light is continuously solidified layer by layer for 60s, so that the alpha-SiAlON ceramic numerical control lathe tool is obtained.
Compared with the photocuring 3D printing method of the alpha-SiAlON ceramic numerical control lathe tool provided by the embodiment 1, the alpha-SiAlON ceramic numerical control lathe tool preparation method provided by the comparative example 1 has the advantages that the alpha-SiAlON ceramic numerical control lathe tool with the single-layer thickness of 20um can be obtained only through the long-time ultraviolet light curing, the curing efficiency is low, and the high-precision alpha-SiAlON ceramic numerical control lathe tool cannot be prepared due to the slow curing speed and the high curing shrinkage rate of the ceramic slurry.
It can be understood from the above embodiments and comparative examples that PPTTA and HDDA are selected as photosensitive resins in the embodiments of the present application, and Irgacure819 and Irgacure369, which have high solubility and low mobility in PPTTA and HDDA, are added as photoinitiators to obtain a first ceramic slurry, which has the characteristics of low viscosity, fast curing speed, low curing shrinkage and good cured film flexibility, and during the process of preparing an alpha-SiAlON ceramic numerically controlled lathe tool by photocuring 3D printing and molding, the photocuring efficiency is improved, the problem of low precision of complex shapes such as arc cutting edges, chip breakers, surface patterns and the like on an alpha-SiAlON ceramic cutter caused by high curing shrinkage of a second ceramic slurry is avoided, and one or more rare earth cations with radius < in alpha-SiAlON ceramic powder is doped
The rare earth oxide improves the fracture toughness of the alpha-SiAlON ceramic numerical control lathe tool, avoids the alpha-SiAlON ceramic numerical control lathe tool from being easily fractured in the process of cutting parts at high temperature and high speed, and prepares Al on the surface of the alpha-SiAlON ceramic numerical control lathe tool2O3The coating improves the stability of the alpha-SiAlON ceramic numerical control lathe tool at high temperature, reduces the abrasion of the alpha-SiAlON ceramic numerical control lathe tool, can prepare the high-precision alpha-SiAlON ceramic numerical control lathe tool with a circular arc cutting edge, a chip breaker groove and a surface with complex shapes and complex shapes according to the requirement, and has high hardness, wear resistance, thermal shock resistance and oxidation resistance at high temperature and high speed, and long service life.
The foregoing is only a preferred embodiment of the present application, and it should be noted that those skilled in the art can also make various changes without departing from the principle of the present applicationDry modification and finishing, e.g. by doping with other rare earth cations with radii <
The rare earth oxides of (a), other methods useful for sintering ceramics, and for making other ISO standard digitally controlled ceramic cutting tools, such improvements and finishes should also be considered within the scope of this application.
Claims (10)
1. A preparation method of an alpha-SiAlON ceramic numerical control turning tool is characterized by comprising the following steps:
step 1: mixing alpha-SiAlON ceramic powder, photosensitive resin, photoinitiator and dispersant to obtain first ceramic slurry;
step 2: dispersing and ball-milling the first ceramic slurry to obtain a second ceramic slurry;
and step 3: carrying out photocuring 3D printing molding on the second ceramic slurry to obtain an alpha-SiAlON ceramic numerical control lathe tool blank;
and 4, step 4: degreasing, sintering and cooling the alpha-SiAlON ceramic numerical control lathe tool blank to obtain an alpha-SiAlON ceramic numerical control lathe tool with an arc blade, a chip breaker groove and surface patterns;
the photosensitive resin is one or more of PPTTA, HDDA, BPA2EODMA and TMPTA;
the photoinitiator is Irgacure819 and/or Irgacure 369.
2. The method for preparing a ceramic numerically controlled lathe tool according to claim 1, wherein the ceramic numerically controlled lathe tool is prepared by a method comprising a step of forming a ceramic layer on the surface of the workpiece
The rare earth metal oxide is yttrium oxide, ytterbium oxide or dysprosium oxide.
3. The method for preparing the ceramic numerical control turning tool according to claim 1, wherein the sintering is hot isostatic pressing sintering, nitrogen atmosphere hot pressing sintering, protective atmosphere gas pressure sintering, spark plasma sintering or microwave sintering.
4. The method for preparing the ceramic numerical control turning tool according to claim 1, wherein the step 2 specifically comprises:
and placing the second ceramic slurry in a trough of a photocuring 3D printer, leveling the second ceramic slurry by a scraper, slicing the three-dimensional model of the alpha-SiAlON ceramic numerical control lathe tool by a computer, performing photocuring to obtain a single-layer alpha-SiAlON ceramic numerical control lathe tool blank body, and continuing photocuring to obtain the alpha-SiAlON ceramic numerical control lathe tool blank body.
5. The method for preparing the ceramic numerical control turning tool according to claim 1, wherein the degreasing is specifically as follows:
and (3) placing the alpha-SiAlON ceramic numerical control turning tool blank in a muffle furnace, raising the temperature to 400-500 ℃ at the heating rate of 0.25-1 ℃/min, and preserving the temperature for 2h for air degreasing.
6. The method for preparing the ceramic numerical control turning tool according to claim 5, wherein before the air degreasing, the method further comprises the steps of placing the alpha-SiAlON ceramic numerical control turning tool blank in a tube furnace, raising the temperature to 500-600 ℃ at the heating rate of 0.5-2 ℃/min, and preserving the temperature for 2h for vacuum degreasing or nitrogen atmosphere degreasing.
7. The method for preparing the ceramic numerical control turning tool according to claim 1, characterized by further comprising the step 5: the coating is prepared on the surface of the alpha-SiAlON ceramic numerical control lathe tool by a physical vapor deposition process or a chemical vapor deposition method.
8. The method for preparing a ceramic numerically controlled lathe tool according to claim 7, wherein the coating is TiC, TiN, TiCN, TiAlN, TiAlSiN or Al2O3And TiB2Any one coating or a composite coating of a plurality of coatings.
9. According to the claimsThe preparation method of the ceramic numerical control lathe tool in claim 7 is characterized in that the coating is Al2O3And (4) coating.
10. An alpha-SiAlON ceramic numerical control lathe tool, which is characterized by being prepared according to the preparation method of the ceramic numerical control lathe tool of any one of claims 1 to 9.
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| PCT/CN2021/083074 WO2022141836A1 (en) | 2020-12-29 | 2021-03-25 | α-SIALON CERAMIC NUMERICAL CONTROL TURNING TOOL AND PREPARATION METHOD THEREFOR |
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