WO2007060907A1 - タングステン合金粒、それを用いた加工方法およびその製造方法 - Google Patents
タングステン合金粒、それを用いた加工方法およびその製造方法 Download PDFInfo
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- WO2007060907A1 WO2007060907A1 PCT/JP2006/323077 JP2006323077W WO2007060907A1 WO 2007060907 A1 WO2007060907 A1 WO 2007060907A1 JP 2006323077 W JP2006323077 W JP 2006323077W WO 2007060907 A1 WO2007060907 A1 WO 2007060907A1
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- Prior art keywords
- tungsten alloy
- tungsten
- powder
- workpiece
- elements
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/02—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving rotary barrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1409—Abrasive particles per se
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- Tungsten alloy grain processing method using the same, and manufacturing method thereof
- the present invention generally relates to tungsten alloy grains, a method of manufacturing the same, and a method of manufacturing the same. Specifically, in order to shape a piezoelectric element such as a crystal resonator, an electronic device, or the like.
- the present invention relates to a tungsten alloy grain used, a caching method using the same, and a manufacturing method thereof.
- shape processing of a piezoelectric element such as a crystal resonator and an electronic device has been performed in a state where an abrasive and a workpiece, or an abrasive, an auxiliary material, and a workpiece are mixed and placed in a processing container. It is done by rotating the processing container.
- Patent Document 1 Japanese Patent Laid-Open No. 10-217084 describes a method of manufacturing a rectangular AT vibrating piece.
- an abrasive and a rectangular AT vibrating piece are placed in a spherical pot, and the spherical pot rotates and revolves to form a slope on the plane of the rectangular AT vibrating piece.
- Patent Document 2 describes a beveling method for a crystal resonator or the like.
- a piezoelectric element plate such as a crystal resonator and a processed polishing material such as an alumina-based loose polishing abrasive grain
- a spherical shape such as a ceramic, a resin material, a crystal material, or a metal is used.
- a plate-like auxiliary material is supplied, put in a processing cylinder, and the processing cylinder is rotated to thereby apply a beveling force to the piezoelectric element plate.
- auxiliary materials are added to increase the caloric efficiency in the shape processing of piezoelectric elements, electronic devices, and the like.
- Patent Document 3 Japanese Patent Laid-Open No. 4-308003
- Patent Document 4 Japanese Patent Laid-Open No. 4-308003
- Patent Document 1 Japanese Patent Laid-Open No. 10-217084
- Patent Document 2 JP 2002-330042 A
- Patent Document 3 Japanese Patent No. 2987911
- Patent Document 4 Japanese Patent Laid-Open No. 4-308003
- an object of the present invention is to reduce the processing time and the quality of the shape imparted to the workpiece in the auxiliary material used for shape check. It is to provide an auxiliary material having a relatively low manufacturing cost, a processing method using the auxiliary material, and a manufacturing method thereof.
- Tungsten alloy grains according to the present invention inevitably have 80% by mass or more and 98% by mass or less tandasten, at least one metal selected from the group consisting of nickel, iron, copper and cobalt.
- the maximum diameter is 0.1 mm or more and 5. Omm or less, and the specific surface area is 0.02 m 2 Zg or less.
- the tungsten alloy grains of the present invention may contain elements other than nickel, iron, copper, and cobalt as long as the operational effects of the present invention are not impaired. For example, manganese, molybdenum, silicon, rhenium, Elements such as chromium, titanium, vanadium, niobium, and tantalum may be contained.
- the tungsten alloy grains according to the present invention have an abundance ratio of elements other than tungsten on the outer surface of the tungsten alloy grains, which is greater than the abundance ratio of elements other than tungsten within the tungsten alloy grains. I prefer that.
- the tungsten alloy particles according to the present invention are preferably used by being mixed with a workpiece in order to process the shape.
- the carbon content of the tungsten alloy grains according to the present invention is 0.01 mass% or less. It is preferable.
- the cleaning method using tungsten alloy particles according to the present invention is a state in which the tungsten alloy particles having the above-mentioned characteristics, the workpiece, and the abrasive are mixed and placed in a container. Then, the shape of the workpiece is processed by rotating the container.
- the workpiece is preferably a crystal piece.
- a method for producing tungsten alloy particles according to the present invention includes a step of mixing tungsten powder, nickel powder, and at least one powder selected from the group consisting of iron powder, copper powder, and cobalt powder.
- the step of granulating by adding an organic binder to the mixed powder obtained in the above mixing step and the granulated powder obtained in the above granulating step are stirred at a temperature above the soft spot of the organic noder.
- the method comprises a step of spheronizing the granulated powder by cooling and a step of sintering the granulated powder.
- the abundance ratio of elements other than tungsten on the outer surface of the tungsten alloy grain based on the abundance ratio of elements other than tungsten inside the tungsten alloy grain. Is also preferably large.
- the tungsten alloy grains contain tungsten as a main component in an amount of 80 mass% or more and 98 mass% or less. Therefore, the tungsten alloy grains have a high specific gravity and are easier to machine than metal tungsten.
- the maximum diameter which is relatively low in manufacturing cost, is 0.1 mm or more and 5. Omm or less, so if it is used as an auxiliary material for shape cleaning, it contributes to the improvement of processing efficiency and the specific surface area is 0. Since it is less than 02m 2 Zg, if it is used as an auxiliary material for shape processing, the possibility of scratching the workpiece can be reduced, and the quality of the shape imparted to the workpiece can be reduced. Can be prevented.
- tungsten alloy grains having a high specific gravity and a smoother surface can be obtained at a relatively low production cost.
- FIG. 1 is a cross-sectional view schematically showing a cross section of a tungsten alloy grain of the present invention.
- FIG. 2 is a diagram conceptually showing a method of applying a beveling force to a quartz crystal as a workable material using the tungsten alloy grains of the present invention as an auxiliary material.
- FIG. 3 shows a scanning electron micrograph of the tungsten alloy grains obtained in Example 1.
- FIG. 4 shows a scanning electron micrograph of the tungsten alloy grains obtained in Comparative Example 2.
- FIG. 5 shows a scanning electron micrograph of the outer surface of the tungsten alloy grain obtained in Example 1.
- FIG. 6 The surface analysis result of the tandastene element by energy dispersive X-ray analysis in the scanning electron micrograph of FIG. 5 is shown.
- FIG. 7 shows a scanning electron micrograph of the inside of the tungsten alloy grains obtained in Example 1.
- FIG. 8 The surface analysis result of the tandastene element by energy dispersive X-ray analysis in the scanning electron micrograph of FIG. 7 is shown.
- FIG. 9 is a diagram showing a method for calculating the abundance ratio of elements other than tandastene in the scanning electron micrographs of the outer surface and inside of tungsten alloy grains.
- the present inventor in the auxiliary material used for shape processing, can shorten the processing time and, on the other hand, does not deteriorate the quality of the shape imparted to the workpiece. In order to obtain an auxiliary material with a low production cost, the following examination was made.
- the characteristics required for a practical high specific gravity auxiliary material are: (a) having a smoother surface so as not to damage the workpiece; and (b) relatively high specific gravity. Three points can be mentioned: high cost and (c) relatively low manufacturing cost.
- Metal tungsten can be listed as a material having a relatively higher specific gravity than steel and stainless steel. Metallic tungsten satisfies the above characteristic (b) and has a relatively low material cost. However, since tungsten metal is a very hard material, it is difficult to machine to satisfy the above characteristic (a) and does not satisfy the above characteristic (c)!
- a tungsten alloy can be cited as a material having a relatively high specific gravity that is easy to machine.
- the tungsten alloy satisfies the above characteristics (b) and (c).
- a tandastain alloy material so as to have a smooth surface so as to satisfy the above characteristic (a) with a conventional tungsten alloy material or tungsten alloy grains.
- a conventional tungsten alloy material is manufactured by preparing a raw material powder of tungsten, forming secondary particles as an aggregate of the particles, and sintering using the secondary particles. At this time, since there are protrusions or corners on the surface of the secondary particles before sintering, the protrusions are also formed on the surface of the tungsten alloy material obtained by sintering the secondary particles. Part or corner remains present.
- conventional secondary particles are formed by mixing a raw material powder of tungsten, a solvent, and an organic binder, and granulating the mixture by a spray dryer method, a stirring method, a rolling method, or the like. Is done by doing. When the granulated powder obtained in this granulation process is dried, the surface force solvent evaporates, so the surface of the secondary particles becomes lava and there are protrusions or corners.
- the green compact may be pulverized to form secondary particles.
- the fracture surface is randomly formed on the surface of the secondary particles, there are protrusions or corners on the surface of the tungsten alloy material obtained by sintering the secondary particles, resulting in a polyhedral shape. Tandastain alloy materials can be obtained.
- the conventional tungsten alloy grains having a maximum diameter of 0.1 to 0.5 mm produced in this way have protrusions or corners on the surface with a specific surface area of about 0.04 m 2 Zg. .
- the specific surface area should be significantly reduced to 0.02 m 2 Zg or less, which is a level that does not damage the workpiece. Is practically difficult because the maximum diameter is as small as 0.1 to 0.5 mm.
- the present inventor has focused on the manufacturing process of the tungsten alloy material. Repeated research. As a result, it has been found that tungsten alloy grains capable of achieving the above object can be obtained by performing a specific treatment in the manufacturing process. The present invention has been made based on such knowledge of the inventors.
- the tungsten alloy grains of the present invention contain tungsten as a main component in an amount of 80% by mass or more and 98% by mass or less, the tungsten alloy grain has a high specific gravity of 15gZcm 3 or more, and it is easier to form granules than metallic tungsten. Since the mechanical force is easy, the manufacturing cost is relatively low. It is preferable that the content of tungsten is 95% by mass or more and the specific gravity is 18 g / cm 3 or more. When the tungsten content exceeds 98% by mass, a high specific gravity exceeding 18.8 g / cm 3 is obtained, but the properties are close to those of pure tungsten, resulting in hard and brittle tungsten alloy grains.
- the total content of nickel, iron, copper and cobalt is preferably 2% by mass or more and 20% by mass or less.
- the total content of these elements is less than 2% by mass, the properties are close to those of pure tungsten, resulting in hard and brittle tungsten alloy grains.
- the total content of these elements exceeds 20% by mass, the specific gravity of the tungsten alloy grains decreases. More preferably, the total content of nickel, iron, copper and cobalt is 2% by mass or more and 5% by mass or less.
- the maximum diameter of the tungsten alloy particles of the present invention is 0.1 mm or more and 5. Omm or less, when used as an auxiliary material for shape processing, the mixed state with the abrasive is improved. This contributes to the improvement of the processing efficiency, that is, the processing time is shortened.
- the maximum diameter of the tungsten alloy grains is preferably 0.1 mm or more and 1. Omm or less, more preferably 0.1 mm or more and 0.5 mm or less.
- the specific surface area of the tungsten alloy grain of the present invention is 0.02 m 2 Zg or less, there are almost no protrusions or corners on the surface, and it is used as an auxiliary material for shape processing. As a result, the possibility of scratching the workpiece material can be reduced, and the quality of the shape imparted to the workpiece can be prevented from being deteriorated.
- the specific surface area of the tungsten alloy grains is more favorable preferable than 0. 015m 2 Zg and even preferably less instrument 0. 01m 2 Zg.
- the specific surface area of the tungsten alloy grains is preferably small, but is preferably at least 0.001 m 2 / g. It is difficult to produce tungsten alloy particles having a specific surface area of less than 0.001 m 2 / g, or the production cost may increase.
- the tungsten alloy particles of the present invention correspond to the tungsten alloy particles obtained after sintering. Thus, it is possible to eliminate the features of the above-described shape without performing post-processing and hardly performing post-processing.
- post-processing such as barrel polishing and lapping is performed. You may give it.
- the factor or element that can reduce the specific surface area to 0.02 m 2 Zg or less is that the composition or phase constituting the outer surface of the tungsten alloy grain is tungsten. This is thought to be due to the difference in the composition or phase constituting the interior of the alloy grain. Specifically, it is considered that the existence ratio of elements other than tungsten is larger than the existence ratio of elements other than tungsten inside the tungsten alloy grains on the outer surface of the tungsten alloy grains.
- FIG. 1 is a cross-sectional view schematically showing a cross section of a tungsten alloy grain of the present invention.
- Tungsten alloys are generally filled with tungsten particles at a high density so as to satisfy a desired specific gravity, and gaps between these tungsten particles and between the tungsten particles are reduced to nickel (Ni), iron (Fe), It has a structure that fills with a binder that also has elemental power other than tungsten, such as Conoleto (Co).
- the inside of the tungsten alloy particles 1 of the present invention manufactured by the manufacturing method described later is filled with tungsten particles 11 at a high density so as to satisfy a desired specific gravity.
- the structure is such that the binder 12 made of an element other than tungsten, such as nickel (Ni), iron (Fe), and conoret (Co), is filled around the tungsten particles 11 and between the tungsten particles 11.
- the outer surface of the tungsten alloy grain 1 has a shape close to a smooth sphere in a state where the tungsten alloy grain 1 is sintered, that is, in a state where no post-processing is performed.
- the tungsten alloy grain 1 according to the present invention has a structure in which the concave portion formed between the tungsten particles 11 exposed on the outer surface is filled with more binder 12. Since the outer surface of the tungsten alloy grain 1 according to the present invention has the above-described structure, the abundance ratio of elements other than tungsten is present on the outer surface of the tungsten alloy grain of elements other than tungsten inside the tungsten alloy grain. It is becoming larger than the existence ratio.
- the abundance ratio of elements other than tungsten is 30-60 on the outer surface of tungsten alloy grains. %, Preferably within the range of 4-30%. If the abundance ratio of elements other than tungsten on the outer surface of the tungsten alloy grains is less than 30%, the irregularities on the outer surface will increase, making it difficult to obtain a smooth outer surface. It becomes difficult to produce the grains substantially, or the overall specific gravity of the tungsten alloy grains decreases. On the other hand, if it is less than the abundance force of elements other than tungsten inside the tungsten alloy grains, the properties are close to those of pure tungsten, and the tungsten alloy grains become hard and brittle. If the abundance ratio of elements other than tungsten in the tungsten alloy grains exceeds 30%, the total specific gravity of the tungsten alloy grains decreases, and the desired high V specific gravity cannot be obtained.
- the carbon content of the tungsten alloy grains of the present invention is preferably 0.01% by mass or less. If the carbon content exceeds 0.01% by mass, the hardness of the tungsten alloy grains will increase, and if used as an auxiliary material for shape care, there is a high possibility of scratching the work material. Become.
- the carbon content is preferably as low as possible, but at least 0.001% by mass or more is desirable. It is practically difficult to produce tungsten alloy grains having a carbon content of less than 0.001% by mass, or the production cost may increase.
- the hardness of the tungsten alloy grains of the present invention is preferably 200 to 400 in terms of Vickers hardness when 5 kg is applied.
- the tungsten alloy grains have a hardness of less than 200, wear due to wear when tungsten alloy grains are used as an auxiliary material may increase. When the hardness of the tungsten alloy grains exceeds 400, the possibility that the tungsten alloy grains will scratch the work material is increased.
- the tungsten alloy particles of the present invention are used in combination with a force-treated material in order to process the shape.
- the cleaning method using tungsten alloy grains according to the present invention comprises rotating the container while rotating the container in a state where the tungsten alloy grains having the above-described characteristics, the workpiece, and the abrasive are mixed and placed in the container. Cover the shape of the power construction material.
- the tungsten alloy particles of the present invention are used in combination with a work material in order to check the shape as an auxiliary material such as convex conveyor and beveling carpet, the conventional auxiliary Compared to the case of using materials, the heating time can be reduced to about 1Z3.
- the workpiece is preferably a crystal piece.
- the beveling caloe is a caloe that forms an R-shaped curved surface on the main surface and side surface of a base plate of a piezoelectric element such as a crystal resonator.
- the tungsten alloy particles of the present invention are used as the auxiliary material 10
- the alumina-based abrasive is used as the polishing material 20
- the base plate (cuboid shape) of the crystal resonator is used as the work material 30.
- an R-shaped curved surface 41 is formed at the corner.
- an R-shaped curved surface 51 is formed on the main surface of the base plate
- an R-shaped curved surface 52 is formed on the side surface of the base plate.
- the tungsten alloy particles of the present invention are produced as follows.
- tungsten powder, a nickel powder, and a powder containing at least one selected from the group consisting of iron powder, copper powder, and cobalt powder are mixed.
- the organic powder is added to the mixed powder obtained in the mixing step and granulated.
- various granulation methods such as a spray dryer method, a stirring method, and a rolling method may be used.
- organic binders that can be used include paraffin, acrylic resin, polybulal alcohol, and polybutylbutyral.
- the granulated powder obtained in the granulation step is stirred at a temperature equal to or higher than the softening point (glass transition point) of the organic binder, and then the granulated powder is spheroidized by cooling.
- the softened granulated powder is agitated and rolled, whereby the projections or corners present on the surface of the secondary particles are rounded to obtain a granulated powder having a smoother surface.
- the spheroidized granulated powder is sieved to separate the granulated powder with a maximum diameter of 0.1 mm or more and 5. Omm or less.
- the maximum diameter is less than 0.1 mm, the mass of the single grain becomes small, so that the tungsten alloy grain does not function as an auxiliary material for shape processing.
- the maximum diameter exceeds 5. Omm, when used as an auxiliary material for shape processing, mixing with the abrasive becomes worse, and tungsten alloy grains do not contribute to shortening the cache time.
- the granulated powder having the spheroidized shape is sintered.
- the sintering temperature is the liquid phase of nickel, iron, copper, and cobalt as binder components other than tungsten so that no protrusions or corners are formed on the surface of the particles by utilizing the surface tension of the solder component.
- the temperature is preferably at least 10 ° C higher than the temperature.
- the tungsten alloy grain of the present invention is used as an auxiliary material for shape check.
- it has a high specific gravity and a smooth surface! You can use it for other purposes by taking advantage of its characteristics.
- tungsten (W) powder, nickel (Ni) powder, iron (Fe) powder, copper (Cu) powder, and cobalt (Co) powder were blended in the mass ratios shown in Table 1 for 1 hour using a mixer.
- various organic binders were added to the above-mentioned metal mixed powder at the mass ratio shown in Table 1 to produce granulated powder.
- the soft spot of paraffin used as the organic binder is 70 ° C
- the soft spot of talyl resin is 110 ° C.
- Example 10 after adding 5% by mass of acrylic resin as an organic binder and 5% by mass of CHBr as a solvent to the above metal mixed powder and mixing for 2 hours in a Henschel mixer, a vacuum pump
- Example 1 the obtained granulated powder was stirred with a mixing stirrer under the conditions of temperature and time shown in Table 1, and then cooled to perform spheroidization.
- Comparative Example 1 commercially available copper (Cu) powder was used as an auxiliary material as it was.
- FIG. 2 shows a scanning electron microscope (SEM) photograph of the tungsten alloy grains obtained in Example 1.
- FIG. 3 shows a scanning electron microscope (SEM) photograph (magnification: X 200) of the tungsten alloy grains obtained in Comparative Example 2.
- SEM scanning electron microscope
- FIG. 5 shows a scanning electron microscope (SEM) photograph (magnification: X 300) of the outer surface of the tungsten alloy grain obtained in Example 1
- FIG. 6 shows a scanning electron microscope photograph of FIG. Energy
- Fig. 7 shows a scanning electron microscope (SEM) photograph (magnification: X300) inside the tungsten alloy grains obtained in Example 1
- Fig. 8 shows energy dispersive X-rays in the scanning electron micrograph of Fig. 7.
- the surface analysis result of tungsten element by analysis (EDX) is shown.
- the white dots indicate the presence of tungsten.
- the abundance ratio of the binder filling the circumference of the tungsten particles and the gaps between the tungsten particles is relatively large as shown in FIG. It can be seen that the abundance ratio of these elements (black part) is relatively large.
- the existence ratio of the binder filling the gaps between the tungsten particles and between the tungsten particles is relatively small, as shown in FIG. It can be seen that the abundance ratio of the element (black part) is relatively small.
- FIG. 9 is a diagram showing a method of calculating the abundance ratio of elements other than tungsten in the outer surface and internal scanning electron micrographs of tungsten alloy grains.
- the inner surface is embedded with tungsten alloy grains in thermosetting resin, polished with # 200 sandpaper, polished with # 800 sandpaper, alumina powder with a particle size of 5 ⁇ m. This is the surface polished in 4 steps in the order of lapping used and lapping using alumina powder with a particle size of 1 ⁇ m.
- Fig. 9 in the SEM photograph (magnification: X300) of the outer surface and the inner surface of tungsten alloy grains (Fig. 5 and Fig. 7), arbitrarily draw 10 line segments L with a length of 50 mm (Fig.
- the abundance ratio of elements other than tungsten calculated as described above is 46.1% on the outer surface of the tungsten alloy grain and 7.6% on the inner side.
- the elemental ratio is 53.9% on the outer surface of tungsten alloy grains and 92.4% on the inner surface.
- Table 2 shows the maximum diameter range, specific gravity, specific surface area measured according to JIS R1626 (gas adsorption BET method), and carbon content, which is one of inevitable impurities. (C content). The carbon content was measured by ICP (Inductively Coupled Plasma) emission spectroscopy.
- Example 1 Using the obtained auxiliary material, as shown in Fig. 1, beveling processing of artificial quartz (dimensions of 4mm X I. 8mm X O. 8mm) as work material 30 is performed.
- Example 1 ⁇ Various auxiliary materials 10 obtained in L0 and Comparative Examples 1-2 and alumina-based abrasives as abrasives 20 were encapsulated in the carburized work material 30
- the cylindrical container 100 was rotated in the direction indicated by the arrow R at a rotational speed of 80 rpm in a state where the cylindrical container 100 having a diameter of 50 mm was placed.
- an R-shaped curved surface 41 was formed at the corner as shown in the supported workpiece 40 after processing.
- the processing time (h) until an R shape with a radius of 5 m or more was formed at the corner, and the rate of occurrence of workpieces with polishing scratches that could be identified with a 20-fold stereo microscope were measured.
- Table 2 The results are shown in Table 2.
- ⁇ The rate of occurrence of workpieces with polishing scratches that can be identified with a 20x stereo microscope is 1% or more and less than 5%
- Occurrence rate of workpieces with polishing scratches that can be identified with a 20x stereo microscope is 5% or more and less than 20%
- X The rate of occurrence of workpieces with polishing flaws that can be identified with a 20x stereo microscope is 20% or more.
- the tungsten alloy particles according to the present invention are used as an auxiliary material to shape-check piezoelectric elements such as quartz resonators, electronic devices, and the like.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Powder Metallurgy (AREA)
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2007546428A JP4916450B2 (ja) | 2005-11-28 | 2006-11-20 | タングステン合金粒、それを用いた加工方法およびその製造方法 |
CN2006800445899A CN101316672B (zh) | 2005-11-28 | 2006-11-20 | 钨合金粒、使用该钨合金粒的加工方法及该钨合金粒的制造方法 |
US12/085,376 US8025710B2 (en) | 2005-11-28 | 2006-11-20 | Tungsten alloy grains, processing method using the same, and method for manufacturing the same |
EP06832938A EP1955795B1 (en) | 2005-11-28 | 2006-11-20 | Tungsten alloy particles, machining process with the same, and process for production thereof |
KR1020087010216A KR101274097B1 (ko) | 2005-11-28 | 2006-11-20 | 텅스텐합금 결정립, 이를 이용한 가공 방법 및 그의 제조방법 |
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JP2005342283 | 2005-11-28 | ||
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WO2007060907A1 true WO2007060907A1 (ja) | 2007-05-31 |
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US (1) | US8025710B2 (ja) |
EP (1) | EP1955795B1 (ja) |
JP (1) | JP4916450B2 (ja) |
KR (1) | KR101274097B1 (ja) |
CN (1) | CN101316672B (ja) |
TW (1) | TWI401124B (ja) |
WO (1) | WO2007060907A1 (ja) |
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JP2010077524A (ja) * | 2008-08-25 | 2010-04-08 | Hyogo Prefecture | 遷移金属固溶タングステン合金粉末及びその製造方法 |
JP2010077523A (ja) * | 2008-08-25 | 2010-04-08 | Hyogo Prefecture | 遷移金属内包タングステン炭化物、タングステン炭化物分散超硬合金及びそれらの製造方法 |
JP2015526306A (ja) * | 2013-07-31 | 2015-09-10 | 嘉興華嶺機電設備有限公司 | 微粒子ナイフ及び当該微粒子ナイフを用いた切削装置 |
JP6106323B1 (ja) * | 2016-07-07 | 2017-03-29 | Jfe精密株式会社 | 焼結タングステン基合金及びその製造方法 |
JP2018060998A (ja) * | 2016-09-28 | 2018-04-12 | 株式会社村田製作所 | メディア |
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- 2006-11-20 JP JP2007546428A patent/JP4916450B2/ja not_active Expired - Fee Related
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Cited By (8)
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JP2010077524A (ja) * | 2008-08-25 | 2010-04-08 | Hyogo Prefecture | 遷移金属固溶タングステン合金粉末及びその製造方法 |
JP2010077523A (ja) * | 2008-08-25 | 2010-04-08 | Hyogo Prefecture | 遷移金属内包タングステン炭化物、タングステン炭化物分散超硬合金及びそれらの製造方法 |
JP2015526306A (ja) * | 2013-07-31 | 2015-09-10 | 嘉興華嶺機電設備有限公司 | 微粒子ナイフ及び当該微粒子ナイフを用いた切削装置 |
JP6106323B1 (ja) * | 2016-07-07 | 2017-03-29 | Jfe精密株式会社 | 焼結タングステン基合金及びその製造方法 |
JP2018003135A (ja) * | 2016-07-07 | 2018-01-11 | Jfe精密株式会社 | 焼結タングステン基合金及びその製造方法 |
JP2018060998A (ja) * | 2016-09-28 | 2018-04-12 | 株式会社村田製作所 | メディア |
JP2020107907A (ja) * | 2016-09-28 | 2020-07-09 | 株式会社村田製作所 | 表面処理装置 |
JP7103381B2 (ja) | 2016-09-28 | 2022-07-20 | 株式会社村田製作所 | 表面処理装置 |
Also Published As
Publication number | Publication date |
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TW200728005A (en) | 2007-08-01 |
EP1955795B1 (en) | 2012-02-15 |
JPWO2007060907A1 (ja) | 2009-05-07 |
US8025710B2 (en) | 2011-09-27 |
EP1955795A1 (en) | 2008-08-13 |
CN101316672A (zh) | 2008-12-03 |
KR20080071556A (ko) | 2008-08-04 |
TWI401124B (zh) | 2013-07-11 |
KR101274097B1 (ko) | 2013-06-13 |
JP4916450B2 (ja) | 2012-04-11 |
EP1955795A4 (en) | 2009-06-10 |
US20090169888A1 (en) | 2009-07-02 |
CN101316672B (zh) | 2011-06-22 |
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