JP5890843B2 - Mo powder for thermal spraying, Mo sprayed film using the same, and Mo sprayed film parts - Google Patents

Description

  The present invention relates to a thermal spraying Mo powder, a Mo sprayed film using the same, and a Mo sprayed film component.

  Thermal spraying is a film forming method in which a material is heated and melted and sprayed onto a substrate (workpiece) to form a film. A combustion flame or plasma is used as a heat source for heating. Thermal spraying methods include flame spraying, explosion spraying, electric spraying, high-speed flame spraying, and the like. In recent years, a cold spray method for forming a film without melting a material has been developed.

  Since thermal spraying can be applied to any material that melts, various materials such as metals, ceramics, cermets, and plastics are used. Therefore, the use is also various, and an abrasion-resistant film | membrane, a corrosion-resistant film | membrane, a heat resistant film | membrane etc. are mentioned, and it is applied to various fields, such as a motor vehicle part, an industrial machine part, and parts for film-forming apparatuses.

  By the way, thermal spraying is performed by processing the thermal spray material into powder or wire (wire shape, rod shape) and supplying it to a heating source. Taking flame spraying as an example, a method using a linear thermal spray material is called “wire flame spraying”, and a method using a powdered molten material is called “powder flame spraying”. I'm calling. The hot wire flame spraying method has an advantage that a linear spray material can be continuously supplied to the combustion flame, so that the supply amount can be easily controlled to be uniform and a uniform sprayed film can be easily obtained.

  However, since the thermal spray material must be processed into a wire, it is suitable for materials that are relatively easy to process such as carbon steel, aluminum, and zinc. However, when applied to hard refractory metals such as molybdenum and tungsten, the cost increases. It was a factor.

  For this reason, when flame spraying a refractory metal, powder flame spraying is often applied. For example, Japanese Patent Application Laid-Open No. 2004-300555 (Patent Document 1) is disclosed as a thermal spraying powder. In patent document 1, the powder for thermal spraying of 5-75 micrometers or 45-250 micrometers is obtained for the Mo powder with an average particle diameter of 10 micrometers or less by the granulation sintering method.

JP 2004-300555 A

  By increasing the particle size by the granulation sintering method, the amount supplied to the thermal spray nozzle (combustion flame) can be increased, so the amount of film formation can be increased. However, the particles obtained simply by the granulation sintering method were large particles (secondary particles) having an aspect ratio of about 2 to 3. Secondary particles with a large aspect ratio have poor fluidity, and when supplied to a thermal spray nozzle, the amount of instantaneous spray powder supplied varies, making it difficult to obtain a film with a uniform thickness. There was a problem.

  The present invention is intended to solve such problems, and an object of the present invention is to provide a thermal spraying Mo powder capable of obtaining a uniform thermal sprayed film, an Mo film using the same, and an Mo film component.

  The Mo powder for thermal spraying according to the present invention is an Mo powder for thermal spraying in which the average particle size of primary particles is 1 μm or more and 10 μm or less, and the average particle size of secondary particles is 20 μm or more and 200 μm or less. The ratio of the secondary particles having .5 is 80% by mass or more and 100% by mass or less.

  In the aspect of the present invention, in an SEM photograph having a unit area of 1000 μm × 1000 μm, even if the area ratio (total area ratio of particles having a major axis of 5 μm or less / 5% total area ratio of particles exceeding 5 μm) is 0 to 10%. Good.

In the embodiment of the present invention, the density of the secondary particles may be 5.0 kg / cm ³ or less.

  In the embodiment of the present invention, the Mo purity may be 99.0% or more.

  In the aspect of the present invention, the thermal spraying Mo powder may be a mixture of Mo powder and second component powder.

  In the embodiment of the present invention, the second component powder may be a carbide component or a Ni component.

  Moreover, in the aspect of this invention, 1-35 mass% of said 2nd component powder may be contained.

  In the aspect of the present invention, the thermal spraying Mo powder may be subjected to a degreasing process or a sintering process.

  In the embodiment of the present invention, the fluidity of the thermal spraying Mo powder may be 50 sec / 50 g or less.

  In the embodiment of the present invention, the cross section of the secondary particles may have a structure in which the cross section of the secondary particles is continuous with the Mo powder and / or the second component powder.

  In another aspect of the present invention, there is also provided a Mo spray coating formed by thermal spraying using the thermal spraying Mo powder.

  Moreover, in another aspect of the present invention, a Mo sprayed film component including the Mo sprayed film is also provided.

  In the aspect of the present invention, the Mo sprayed film component is at least one selected from the group consisting of an automotive component, an aircraft component, a power generator component, an X-ray tube component, a thermoelectric conversion device, and a mold. It can be a seed.

  Moreover, in the aspect of this invention, 5-500 micrometers may be sufficient as the average film thickness of the said Mo sprayed film.

  The Mo powder for thermal spraying according to the present invention can easily manage the supply amount of the thermal spraying powder to the thermal spray nozzle by increasing the ratio of secondary particles having an aspect ratio in the range of 1.0 to 1.5. Therefore, a uniform high melting point metal sprayed film can be obtained. In addition, the use of secondary particles to which primary particles are bonded can prevent an increase in cost.

The figure which shows one embodiment of the Mo powder for thermal spraying by this invention. The figure which shows another embodiment of the Mo powder for thermal spraying by this invention. Sectional drawing of the secondary particle of the Mo powder for thermal spraying by one embodiment of this invention. The figure which shows an example of Mo sprayed film components.

  The Mo powder for thermal spraying according to the present invention is an Mo powder for thermal spraying in which the average particle size of primary particles is 1 μm or more and 10 μm or less, and the average particle size of secondary particles is 20 μm or more and 200 μm or less. The ratio of the secondary particles having .5 is 80% by mass or more and 100% by mass or less.

  In the present invention, primary particles indicate one Mo powder (one grain) or one second component powder (one grain), and secondary particles are particles in which a plurality of primary particles are solidified. Show. The term “primary particles are solidified” indicates a state in which the particles are aggregated and solidified, a state in which the particles are bonded via an adhesive or a binder, or a case where primary particles are granulated.

  FIG. 1 shows an example of a state in which primary particles and secondary particles are mixed. In the figure, reference numeral 1 denotes primary particles of the thermal spraying Mo powder, and reference numeral 2 denotes secondary particles of the thermal spraying Mo powder.

  The Mo powder for thermal spraying according to the present invention may be composed of Mo metal alone, or may be a mixture of Mo powder and second component powder. When the second component powder is included in the thermal spraying Mo powder, the second component powder is not particularly limited as long as it is other than metal Mo. Carbide powder, Ni component powder, Co component powder, rare earth element component powder Etc. Examples of the carbide include molybdenum carbide, tungsten carbide, and silicon carbide. The Ni component powder, the Co component powder, and the rare earth element component powder include various metals such as simple metals, alloys, and compounds. Among these, molybdenum carbide or Ni component is preferable as the second component powder. Molybdenum carbide has an effect of adsorbing impurity oxygen (including oxygen at the time of thermal spraying in the atmosphere) in the thermal spraying process. Further, since molybdenum carbide also has an effect as a lubricant, it is possible to improve the wear resistance of the sprayed film. Further, since the Ni component has good corrosion resistance, the corrosion resistance of the sprayed film can be improved. Further, the second component powder is not limited to one type, and may be two or more types. Moreover, it is preferable that the mixing amount of 2nd component powder is the range of 1-35 mass% when the sum total value of Mo powder and 2nd component powder is 100 mass%. If it is this range, the characteristic of 2nd component can be provided taking advantage of the goodness of Mo in a sprayed film. Hereinafter, when it is simply described as “Mo powder”, it is meant to include a mixture of Mo powder and a second component powder in addition to those composed of Mo powder alone.

  The Mo purity is preferably 99.0% or more (mass%). If the Mo purity is less than 99.0%, the melting point of the Mo powder may vary due to the presence of impurities.

  In the present invention, if the average particle size of the primary particles is less than 1 μm, the powder is too fine and the handleability is poor, and if it exceeds 10 μm, the size of the secondary particles may be unnecessarily large. Further, when the average particle size of the secondary particles is less than 20 μm, the effect of forming the secondary particles is small. When the average particle size exceeds 200 μm, the size is too large, resulting in variations in the material supply amount in the thermal spraying process. In addition, the temperature of the flame flame is different between the surface and the center of the flame, and even if the Mo powder is supplied to the same flame flame, the melting method is different between the large powder and the small powder. If the melting of the Mo powder (and the second component powder) is not uniform, an unmelted structure is formed in the obtained sprayed film, and the film quality varies. Therefore, it is preferable that there are no very large particles.

  In the present invention, secondary particles having an aspect ratio of 1.0 to 1.5 are contained in an amount of 80% by mass to 100% by mass. For the measurement of the aspect ratio, an enlarged photograph is used, and the vertical and horizontal maximum lengths of secondary particles appearing in the enlarged photograph (SEM photograph) as shown in FIG. The aspect ratio is obtained by (A / B or B / A), where the smaller of the maximum vertical length A and the maximum horizontal length B is the denominator and the larger is the numerator. Since the smaller one of the maximum vertical length A and the maximum horizontal length B is used as the denominator, the minimum value is 1.0. An aspect ratio of 1.5 or less indicates that the secondary particles are almost spherical. When the aspect ratio is larger than 1.5, the size of individual secondary particles varies greatly. If the size variation is large, the amount of material supplied to the spray flame flame varies, and the film thickness of the sprayed film varies, making it difficult to form a uniform film. In addition, as described above, the temperature of the spray flame flame differs between the surface and the center, so if there are secondary particles with a very large aspect ratio, the secondary particles will be melted differently, and an unmelted structure will be formed in the sprayed film. As a result, the film quality is uneven. Therefore, in the present invention, the ratio of secondary particles having an aspect ratio of 1.0 to 1.5 is 80% by mass or more. It is preferable that all the secondary particles have an aspect ratio in the range of 1.0 to 1.5.

  As described above, the Mo sprayed film composed of the Mo powder alone or the Mo sprayed film provided with the characteristics of the second component powder while maintaining the characteristics of the Mo sprayed film needs to be a sprayed film having a uniform film quality. . In order to form a uniform sprayed film, it is important to use secondary particles and control the aspect ratio of the secondary particles. In order to obtain a more uniform sprayed film, it is also necessary to minimize the presence of small particles. The sprayed film is a technique for forming a film by melting Mo powder with a flame flame and spraying it at a high speed. In the present invention, since the thermal spraying Mo powder is melted by the thermal spray flame, if the size of the Mo powder varies, the method of melting the Mo powder varies. A small Mo powder is a primary particle which did not become a secondary particle, or a small secondary particle even if it is a secondary particle.

  Therefore, in the SEM photograph having a unit area of 1000 μm × 1000 μm, it is preferable that the area ratio (total area ratio of particles having a major axis of 5 μm or less / total area ratio of particles exceeding 5 μm) is 0 to 10%. For the area ratio, first, an SEM photograph (enlarged photograph) having a unit area of 1000 μm × 1000 μm is taken, and the longest diagonal line of each powder is measured as the major axis L. FIG. 2 shows an example of measuring the major axis. By using the enlarged photo, the powder can be captured in two dimensions. The major axis L of the primary particle or secondary particle reflected there is measured. The major axis L is distributed to particles of 5 μm or less and more than 5 μm, and the respective areas are obtained and totaled. The major axis L and the area are determined for a total of 200 or more particles to determine the area ratio (total area ratio of particles having a major axis of 5 μm or less / 5% total area ratio of particles exceeding 5 μm).

  By reducing the area ratio of small particles (primary particles that did not become secondary particles or small secondary particles) having a major axis L of 5 μm or less to 10% or less, variation in melting when injected into a spray flame flame is reduced. be able to. In order to reduce the melting variation, the area ratio should be 10% or less, further 5% or less, and most preferably 0%. In other words, all the particles are made into secondary particles having a major axis L exceeding 5 μm.

Moreover, it is preferable that the density of a secondary particle is 5.0 kg / cm < ³ > or less. So far, the control by the external shape such as the particle size and aspect ratio of the primary particles and the secondary particles has been described. However, the secondary particles are formed by sterically bonding the primary particles. Therefore, it is also important to control the density of secondary particles.

The secondary particles of the thermal spraying Mo powder are dispersed into primary particles when put into the thermal spray flame. The scattered primary particles are melted, sprayed at a high speed, and deposited on the substrate to form a sprayed film. For this reason, if the density of the secondary particles is too high, it will be difficult to disperse by being scattered to the primary particles when put into the spray flame flame. When the secondary particles are deposited as a sprayed film, an unmelted structure is formed and the film quality is different. Therefore, the density of the secondary particles is preferably 5.0 g / cm ³ or less, more preferably 3.0 g / cm ³ or less. The lower limit value of the density is not particularly limited, but if the density is too low, the shape maintaining property of the secondary particles is deteriorated and the primary particles are scattered before being supplied to the flame spray flame. On the other hand, when the density is too low, secondary particles with hollow inside are formed. If there are too many cavities, the material supply will vary. That is, even if the secondary particles have the same particle size and aspect ratio, if the density is different, the amount of primary particles forming the secondary particles is different, resulting in variations in the amount of material supply. Therefore, the density of the secondary particles is preferably 1.0 g / cm ³ or more. The density of the secondary particles is more preferably 1.0 to 3.0 g / cm ³ . In addition, the density of secondary particles shall be performed by the Archimedes method.

  Moreover, it is preferable that the cross section of a secondary particle is a structure where Mo powder and / or 2nd component powder are continuing. As described above, when the secondary particles are supplied to the spray flame flame, the secondary particles are scattered to the primary particles, and the scattered primary particles are melted and deposited on the base material to form a sprayed film. Since the cross-section of the secondary particles has a structure in which the primary particles are continuous, the ratio of the primary particles can be made uniform in the process in which the scattered primary particles are sprayed onto the base material. If the ratio of the primary particles is uniform in the step of spraying onto the base material, the film quality of the finished sprayed film can be made uniform. FIG. 3 shows an example of a structure in which Mo powders (and second component powders) are connected. When the cross section of the secondary particle is viewed, it has a structure in which Mo powder or Mo powder and second component powder (primary particles) are connected from one end to the other end.

  Further, the thermal spraying Mo powder according to the present invention is preferably subjected to a degreasing treatment or a sintering treatment. If it is Mo powder for thermal spraying of this invention, fluidity | liquidity can be 50 sec / 50g or less. By performing the degreasing process or the sintering process, the fluidity can be improved to 30 sec / 50 g or less. In the present invention, the fluidity is measured by using an extruded plastometer according to JIS-K-6760 and measuring how many seconds it takes for 50 g of the thermal spraying Mo powder to be extruded.

  A degreasing process is a process which heat-processes at less than 600-1000 degreeC, and burns down the resin binder in a secondary particle. In addition, the sintering process is a method of heating to 1000 to 1400 ° C. to burn out the resin binder and strengthen the bonding force between the primary particles. If the degreasing treatment temperature is less than 600 ° C., the degreasing treatment takes too much time and the productivity is lowered. On the other hand, when the sintering temperature is higher than 1400 ° C., the binding force of the primary particles becomes too strong, and the secondary particles are difficult to be dispersed into the primary particles when put into the spray flame flame.

  As described above, with the thermal spraying Mo powder according to the present invention, fine primary particles are processed into secondary particles, and the aspect ratio of the secondary particles is set to a predetermined size, so that the handleability is good. . Therefore, the supply amount to the thermal spray flame can be stabilized. Furthermore, when the secondary particles are supplied to the spray flame flame and dispersed on the base material to form a film on the base material, the supply amount of the primary particles to the base material can be stabilized. Therefore, a uniform Mo sprayed film can be obtained. Moreover, since Mo powder is more easily melted than Mo wire and Mo rod as in the prior art, the deposition rate can be increased with the same spray flame flame.

  Moreover, if the thermal spraying Mo powder of the present invention is used, the film formation amount can be made uniform while enabling a significant cost reduction compared to the case of using a wire. In addition, by controlling the density and fluidity, not only the film formation amount can be made uniform, but also handleability such as automation of the film formation process can be improved.

  By spraying such a thermal spraying Mo powder and forming a film on the substrate, various Mo sprayed films can be obtained. Further, the present invention can be applied to various sprayed parts provided with such a sprayed film. FIG. 4 shows an example of a thermal sprayed part. In the figure, reference numeral 4 represents a sprayed film, and reference numeral 5 represents a substrate. The sprayed parts are not particularly limited as long as they are parts having a sprayed film, but examples include wear-resistant films, corrosion-resistant films, heat-resistant films, automotive parts, industrial machine parts, film forming apparatus parts, etc. It can be applied to various fields. Moreover, the film thickness of a sprayed film is not specifically limited, 10-500 micrometers is illustrated.

  Next, the manufacturing method of the thermal spraying Mo powder by this invention is demonstrated. If the Mo powder for thermal spraying of this invention comprises the said structure, the manufacturing method will not be specifically limited, However, The following method is mentioned as a manufacturing method for improving a yield.

  First, Mo powder having a primary particle diameter of 1 to 10 μm is prepared. Moreover, when obtaining what mixed Mo powder and 2nd component powder as Mo powder for thermal spraying, Mo powder and 2nd component powder whose primary particle diameters are 1-10 micrometers in average particle diameter are prepared. The primary particle size is the FSSS particle size. The purity of the Mo powder is preferably 99.0 wt% or more, more preferably 99.9 wt% or more. The prepared Mo powder (and the second component powder) is put into a stirring device such as a rotary atomizer and sufficiently stirred. In addition, hereinafter, when simply described as “Mo powder”, it is meant to include a mixture of a Mo powder and a second component powder in addition to a Mo powder alone.

  Next, a resin binder is added and a granulation process is performed. The resin binder is preferably at least one of polyvinyl alcohol powder, polyethylene glycol powder or carbomethylmethylcellulose powder. Since these resin binders are burned off when heated to 600 ° C. or higher, it is easy to control the density of secondary particles. Moreover, since it can be mixed with Mo powder in powder form, it can mix uniformly. It is preferable to apply a spray dryer system, a rolling granulation system, etc. to a granulation process. By performing the granulation step, the primary particles can be processed into secondary particles.

  Moreover, a degreasing process or a sintering process is performed as needed. A degreasing process is a process which heat-processes at less than 600-1000 degreeC, and burns down the resin binder in a secondary particle. In addition, the sintering process is a method of heating to 1000 to 1400 ° C. to burn out the resin binder and strengthen the bonding force between the primary particles. When such a treatment is performed, the density of the secondary particles can be adjusted, and the cross section can be made to have a structure in which Mo powders (primary particles) are connected. Moreover, the aspect ratio of secondary particles can improve the ratio of aspect ratio 1.0-1.5 by optimizing the conditions of a granulation process. It is also effective to classify the shape by sieving or the like as necessary. In particular, since the rolling speed of the inclined surface is different when the aspect ratio is 1.5 or less and 1.6 or more, the shape classification method using this phenomenon is also effective. The thermal spraying Mo powder obtained by such a production method is excellent in handling properties because of its excellent fluidity.

  Examples The present invention will be described in more detail with reference to examples, but the present invention is not limited to the contents of these examples.

<Examples A1 to A5, Comparative Example A1>
A molybdenum powder having a purity of 99.9% by mass or more (primary particle diameter is shown in Table 1) was prepared as a raw material powder. The molybdenum powder was pulverized by a rotary atomizer. Next, it was mixed with a resin binder (polyvinyl alcohol resin binder) to prepare a Mo powder slurry.

  Next, secondary particles of Mo powder were obtained by granulating the Mo powder slurry using a spray dryer. In addition, degreasing treatment or sintering treatment was performed as shown in the table. What changed the ratio of the secondary particle of aspect ratio 1.0-1.5 by changing the conditions (rotation speed, supply amount, etc.) of the spray dryer was prepared.

  Regarding the Mo powder for thermal spraying of each Example and Comparative Example, the area ratio (total area ratio of particles having a major axis of 5 μm or less / 5% total area ratio of particles exceeding 5 μm), the density of secondary particles, and the cross section of the secondary particles are Mo powder. The fluidity was examined to see if they were connected. The results are shown in Tables 1 and 2.

  In addition, the area ratio (total area ratio of particles having a major axis of 5 μm or less / total area ratio of particles exceeding 5 μm) was determined as follows. First, the thermal spraying Mo powder was spread on a glass plate, and an enlarged photograph having a unit area of 1000 μm × 1000 μm was taken. The maximum diameter of each thermal spraying Mo powder shown in the enlarged photograph was measured, and the area ratio was determined by dividing the maximum diameter into those having a maximum diameter of 5 μm or less and exceeding 5 μm.

  The density of secondary particles was analyzed by Archimedes method. In addition, the cross-section of the secondary particles is determined by checking whether the Mo powders are connected to each other by cutting the secondary particles and taking a cross-sectional photograph to determine whether the Mo powders (primary particles) are connected at an arbitrary diagonal line. did. The fluidity was measured by using an extruded plastometer according to JIS-K-6760, and how many seconds it took for 50 g of the thermal spraying Mo powder to be extruded.

  As shown in Tables 1 and 2, the thermal spraying Mo powders of Examples A1 to A5 were excellent in fluidity.

Next, a thermal spray film was formed using the thermal spraying Mo powders of Examples A1 to A5 and Comparative Example A1 obtained as described above. A film was formed in the atmosphere using a powder frame spraying device. A Mo plate having a length of 10 cm, a width of 10 cm, and a thickness of 1 mm was used as the substrate. The variation in film thickness was examined when a sprayed film of 2 cm in length and 2 cm in width was sprayed over a certain time on a substrate. Three 2 × 2 cm sprayed films were provided, and the difference between the maximum value and the minimum value of the film thickness was determined as follows, and this was used as the dispersion of the sprayed film.
Dispersion of sprayed film (%) = [(maximum value of film thickness−minimum value of film thickness) / (maximum value of film thickness + minimum value of film thickness)] × 100 (%)
Further, the surface roughness Ra of each sprayed film was obtained. The results are shown in Table 3.

  As can be seen from Table 3, the sprayed film using the thermal spraying Mo powders of Examples A1 to A5 had a dispersion of the sprayed film as small as 6% or less. Moreover, the surface roughness (Ra) was small, and a film with uniform film quality was obtained despite the film formation in the atmosphere. In particular, those subjected to degreasing treatment and sintering treatment exhibited excellent characteristics.

<Examples B1 to B5, Comparative Example B1>
Implementation was carried out except that the raw material powder used was a mixture of molybdenum powder having a purity of 99.9% by mass or more and each second component powder shown in Table 4 (primary particle diameter and blending ratio are shown in Table 4). In the same manner as in Example A1, Mo powder for thermal spraying was produced. About the obtained Mo powder for thermal spraying, in the same manner as in Example A1, the area ratio (total area ratio of particles having a major axis of 5 μm or less / total area ratio of particles exceeding 5 μm), the density of secondary particles, and the secondary particles The cross section was examined for fluidity as to whether or not the Mo powder was continuous. The results are shown in Tables 4 and 5.

  As shown in Tables 4 and 5, the thermal spraying Mo powders of Examples B1 to B5 were excellent in fluidity.

  Next, using the obtained thermal spraying Mo powders of Examples B1 to B5 and Comparative Example B1, a thermal spray film was formed in the same manner as in Example A1, and the variation (%) of the thermal spray film and the surface roughness of the thermal spray film were measured. Ra was determined. The results are shown in Table 6.

  As can be seen from Table 6, the sprayed film using the thermal spraying Mo powders of Examples B1 to B5 had a dispersion of the sprayed film as small as 6% or less. Moreover, the surface roughness (Ra) was small, and a film with uniform film quality was obtained despite the film formation in the atmosphere. In particular, those subjected to degreasing treatment and sintering treatment exhibited excellent characteristics.

1 ... Mo powder for spraying (primary particles)
2 ... Mo powder for thermal spraying (secondary particles)
L: Particle size of Mo powder for spraying (secondary particles) 3 ... Part where Mo powder and / or second component powder are connected 4 ... Sprayed film 5 ... Base material

Claims (11)

In the thermal spraying Mo powder having an average primary particle size of 1 μm or more and 10 μm or less, and an average secondary particle size of 20 μm or more and 200 μm or less, secondary particles having an aspect ratio of 1.0 to 1.5 are included. proportion of is 80 mass% or more state, and are 100% by mass,
In the SEM photograph having a unit area of 1000 μm × 1000 μm, the area ratio (total area ratio of particles having a major axis of 5 μm or less / 5% total area ratio of particles exceeding 5 μm) is 0 to 5%.
The density of the secondary particles is 1.0 to 3.0 g / cm ³ ;
The cross-section of the secondary particles has a structure in which Mo powder and / or second component powder is continuous . The Mo powder for thermal spraying according to claim 1 , wherein the Mo purity is 99.0% or more. The Mo powder for thermal spraying according to claim 1 or 2 , wherein the Mo powder for thermal spraying is a mixture of Mo powder and a second component powder. The Mo powder for thermal spraying according to claim 3 , wherein the second component powder is a carbide component or a Ni component. The Mo powder for thermal spraying according to claim 3 or 4 , wherein the second component powder is contained in an amount of 1 to 35 mass%. The Mo powder for thermal spraying according to any one of claims 1 to 5 , wherein a degreasing treatment or a sintering treatment is performed. The Mo powder for thermal spraying according to any one of claims 1 to 6 , wherein the fluidity is 50 sec / 50 g or less. Mo sprayed film formed by thermal spraying using the Mo powder for thermal spraying according to any one of claims 1 to 7 . A Mo sprayed film component comprising the Mo sprayed film according to claim 8 . Mo sprayed coating component is at least one parts, aircraft parts, power generation equipment power parts, parts for X-ray tube, is selected from the group consisting of thermoelectric conversion devices, and mold automobile, according to claim 9 Mo sprayed coating parts. The Mo sprayed film component according to claim 9 or 10 , wherein an average film thickness of the Mo sprayed film is 5 to 500 µm.

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