JP7194904B2 - magnesium alloy powder - Google Patents

Description

The present invention relates to a magnesium alloy powder that is produced as a powder instead of mechanically pulverizing or shaving an alloy billet.

BACKGROUND ART Various metal materials are used to form housings and the like in various applications such as electronic equipment, transportation equipment such as automobiles and aircraft, precision equipment, and manufacturing machinery. Such electronic equipment, transportation equipment, precision equipment, manufacturing machines, etc. are required to be lightweight. Electronic equipment and precision equipment are required to be lightweight in order to improve portability. Transportation equipment and the like are required to be lighter in order to improve fuel efficiency and operational performance.

In addition, strength and durability are also required in many fields such as electronic equipment and transportation equipment. Electronic devices and precision devices require metal materials that are lightweight yet strong for their housings. Transportation equipment requires metal materials that are lightweight, strong, and heat-resistant.

Such metal materials, which are lightweight yet have excellent durability and strength (heat resistance), are increasingly being used for the structural members of these devices. For example, aluminum and aluminum alloys are sometimes adopted from the viewpoint of lightness. This is because its lightness is high when compared with iron materials.

However, aluminum and aluminum alloys are often inadequate in terms of strength, durability, and the like. In recent years, there has been a demand for metal materials in the form of powder for three-dimensional printers and plastic working, rather than molding metal materials in the form of ingots and the like.

There is also increasing use of additive manufacturing to manufacture parts using metallic materials in powder form. Among these, the above-mentioned three-dimensional printer is used as one of lamination molding. That is, the production of members by additive manufacturing, including three-dimensional printers, is increasing, and for this reason, metal materials in the form of powder are required.

Under these circumstances, among the metals that can be used as structural materials, magnesium, which has the lowest density, has attracted attention. The room temperature density of magnesium is 1.7 g/cm3, which is about 1/4 that of iron and about 2/3 that of aluminum. Magnesium is also known to have excellent properties such as specific strength, specific rigidity, machinability, dent resistance, and vibration absorption.

In other words, magnesium is superior not only to metal materials such as iron, but also to aluminum in terms of weight reduction and other points. For this reason, magnesium has been used in small electronic devices such as the housings of notebook computers and mobile terminals. As a further development, as described above, it is desired to be used for various parts of transportation equipment including electronic equipment. Alternatively, it is required to be adopted not only for housings but also for internal structural members (parts of internal combustion engines, etc.).

However, magnesium easily ignites at low temperatures and has the problem of low strength characteristics (low flame retardancy) in high temperature environments. The low flame retardancy of electronic equipment also makes it difficult to use magnesium metal for components and housings of electronic equipment. Furthermore, when magnesium metal is applied to equipment that tends to generate heat, such as transportation equipment, the problem of low flame retardancy appears more remarkably.

For example, many transportation vehicles are often driven by engine mechanisms. Various parts used in transportation equipment are susceptible to heat from the engine mechanism and heat from driving, and are likely to be in a high-temperature environment. Unlike small electronic devices, it has been difficult to apply magnesium metal to various parts of transportation equipment due to the problem of heat resistance.

In addition, as described above, in recent years, the production of members using a three-dimensional printer and the production of members by plastic working are increasing. In such a manufacturing process, it is preferable that the metal material is manufactured from a powder form rather than being molded from an ingot form. In particular, three-dimensional printers require powder metal materials. This is because production from this powder is required in layered manufacturing.

In addition to the structural members of electronic equipment and transportation equipment, the application of magnesium-based metal materials is required in various fields such as battery electrode materials, medical devices, and paints, due to their light weight and chemical properties. . For such applications as well, there is a demand for magnesium-based metal materials in the form of powder rather than in the form of ingots or plates.

Thus, there is a need for magnesium alloys in powder form for applications that require light weight, flame retardancy, and production from powder form. This powder form is realized as a powder when the magnesium alloy is produced, and is not made fine by cutting an ingot or the like.

Under such circumstances, a technique for magnesium alloy powder has been proposed (see, for example, Patent Document 1).

JP 2017-61753 A

Patent Document 1 describes a powder composed of a magnesium-based alloy containing 0.2% by mass or more and 5% by mass or less of calcium, the particle surfaces of which are covered with a coating layer containing calcium oxide, and the average particle diameter of the particles is 100 μm or more and 1500 μm or less, and when the micro Vickers hardness is measured at 10 points on the cross section of the particle, the average value of the hardness variation index, which is the value obtained by dividing the difference between the maximum value and the minimum value by the maximum value, is 0 .3 or less magnesium-based alloy powder is disclosed.

However, the magnesium-based alloy powder of Patent Document 1 has a problem that the average particle size is 100 μm or more and the particle size is large. For example, a three-dimensional printer requires a powder metal material with a particle size of less than 100 μm, and the magnesium-based alloy powder disclosed in Patent Document 1 is difficult to use in a three-dimensional printer. In addition, not only structural members manufactured by three-dimensional printers, but also electrode materials, paints, medical devices, etc., need to have a small powder particle size in terms of strength, durability, workability, and the like.

In this respect as well, there is a problem that the technique of Patent Document 1 is insufficient.

In addition, the technology of Patent Document 1, as described in claim 10, is used for extruded bodies. There is also a problem that it is not suitable for applications such as.

In view of these problems, the present invention is a magnesium alloy powder in a powder form that is lightweight and suitable for applications such as structural members in three-dimensional printers, electrode materials, paints, medical devices, etc. intended to provide

In view of the above problems, the magnesium alloy powder of the present invention contains calcium,
contains magnesium,
The calcium is 20 mass% or less with respect to the whole,
The average particle size of the powder is less than 100 μm,
The average grain size of the solidified structure is less than 5 μm,
The particle size shape of the powder is substantially spherical,
In the particle size distribution of the powder to be produced, the particle size of 90% or more of the powder as a whole is less than 100 μm,
Used in 3D printers.

The magnesium alloy powder of the present invention is produced as a powder without being finely milled from an ingot or the like by cutting or the like. For this reason, each of the powders contains a solidified structure, and the properties of magnesium and the properties of other substances added can be appropriately reflected. In addition, since it is a powder of particles in which the solidified structure has grown, the individual shapes and physical properties of the powder are highly uniform, making it suitable for the subsequent production of members. In particular, the lightness characteristic of magnesium can also be realized in the manufactured members.

In addition, since the particle size and the particle size of the solidified structure are sufficiently small compared to the conventional technology, it can be optimally used for a three-dimensional printer.

In addition, since the grain size of the solidified structure is very small, the mechanical properties are improved due to the refinement of the structure.

4 is a graph showing that the ignition temperature of magnesium alloys increases when calcium is mixed. 1 is a photograph of magnesium alloy powder in Embodiment 1 of the present invention. 4 is a photograph of magnesium alloy powder having different average particle diameters according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram showing a method for producing a magnesium alloy ingot; 2 is a photograph of an ingot-type magnesium alloy manufactured by the inventor in Embodiment 2 of the present invention. It is a measurement result of the composition ratio of the magnesium alloy of the ingot form. FIG. 4 is a schematic diagram showing a method for producing magnesium alloy powder according to Embodiment 2 of the present invention. 4 is a photograph of magnesium alloy powder produced in Embodiment 2 of the present invention. FIG. 5 is an explanatory diagram showing quantitative evaluation of magnesium alloy powder in Embodiment 2 of the present invention. 4 is a graph showing calculation results of the average particle size of magnesium alloy powder produced in Embodiment 2 of the present invention. 4 is a graph showing the average grain size distribution of the solidified structure in Embodiment 2 of the present invention.

The magnesium alloy powder according to the first aspect of the present invention comprises calcium,
contains magnesium,
The average particle size of the powder is less than 200 μm,
The average grain size of the solidified structure is less than 5 μm.

With this configuration, it is possible to provide an alloy material that is lightweight and flame-retardant and that can be used to manufacture members and parts by processes such as layered manufacturing and spraying.

In the magnesium alloy powder according to the second aspect of the present invention, in addition to the first aspect, the average particle size of the powder is less than 100 μm.

With this configuration, the particle size becomes smaller, and a magnesium alloy powder that can be optimally used for various applications such as layered manufacturing and coating can be realized.

In the magnesium alloy powder according to the third aspect of the present invention, in addition to the first aspect, the average particle size of the powder is less than 67 μm.

This configuration allows optimal use, for example, in a three-dimensional printer.

In the magnesium alloy powder according to the fourth invention of the present invention, in addition to any one of the first to third inventions, the calcium content is 0 to 20 mass% with respect to the whole.

With this configuration, it is possible to realize a magnesium alloy powder that can maintain the properties of magnesium while achieving flame retardancy.

In the magnesium alloy powder according to the fifth aspect of the present invention, in addition to any one of the first to fourth aspects, the particle size shape of the powder is substantially spherical.

This configuration facilitates use in a variety of applications.

A magnesium alloy powder according to a sixth aspect of the present invention, in addition to any one of the first to fifth aspects, is used in a three-dimensional printer.

With this configuration, even in a three-dimensional printer, it becomes possible to manufacture members and parts that take advantage of the properties of magnesium.

In the magnesium alloy powder according to the seventh invention of the present invention, in addition to any one of the first to sixth inventions, the magnesium alloy powder is used for electronic equipment, transportation equipment, precision equipment, electrode materials, medical devices, Used in any of the paints.

This configuration makes it optimal for use in a variety of applications where powder form is preferred.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)

(overall overview)
First, an overview of the magnesium alloy powder of the present invention will be described.

The magnesium alloy powder in Embodiment 1 of the present invention is produced in the form of powder. Powder is not obtained by cutting a member such as an ingot.

The magnesium alloy powder in Embodiment 1 contains calcium and magnesium, has an average particle size of less than 200 μm as a powder, and an average particle size of a solidified structure of less than 5 μm.

Magnesium alloy powder is powdery at the stage of production. The powder in this form has an average particle size of less than 200 μm. Since it is the average particle size, it is the average of the particle sizes of a plurality of magnesium alloy powders. The average particle size of the plurality of magnesium alloy powders is 200 μm or less.

Since it has a very small average particle size of less than 200 μm, it can be suitably used for electrode materials, medical devices, paints, materials for laminated devices, and the like.

Moreover, the magnesium alloy powder has a solidified structure inside. A solidified structure grows during the manufacturing process. The average grain size of this solidified structure is less than 5 μm. When the average grain size of the solidified structure is less than 5 µm, the strength of the magnesium alloy powder is achieved. As a result, the magnesium alloy powder can be suitably used for electrode materials, medical devices, paints, materials for laminated devices, and the like.

In addition, since the average grain size of the solidified structure is as small as less than 5 μm, the mechanical properties of members and parts manufactured using the magnesium alloy powder are improved.

Magnesium alloy powder can be suitably used for electrode materials, medical devices, paints, materials for laminated devices, etc., because the average particle size and the average particle size of the solidified structure are very small. Moreover, it can be suitably used as a material for laminated devices such as three-dimensional printers. It can be suitably used in fields where it is necessary to be powdery and to have a small particle size.

In addition, the magnesium alloy powder of the present invention also has the advantage of being flame-retardant because it contains calcium. Being flame-retardant (having a high ignition temperature), it can also be used for parts, members, structural materials, etc. of electronic equipment and transportation equipment that can reach high temperatures.

FIG. 1 is a graph showing that the ignition temperature of magnesium alloys increases when calcium is mixed. As shown in the graph of FIG. 1, the ignition temperature of the magnesium alloy mixed with calcium is higher than that of magnesium alone, and the ignition temperature rises as the amount of the mixture increases. As a result, it can be seen that the flame retardancy of magnesium alloys to which calcium is added is enhanced.

(Average particle size)
In the above description, as the first stage, the case where the average particle size of the magnesium alloy powder is less than 200 μm has been described. As a second step, the magnesium alloy powder of the present invention preferably has an average particle size of less than 100 μm.

When the average particle size is less than 100 μm, the magnesium alloy powder of the present invention becomes smaller and can be used more preferably for the electrode materials, medical devices, paints, materials for laminated devices, and the like. A small particle size facilitates the manufacturing process in such devices and improves the durability and strength of these devices and components produced.

As the third step, it is also preferable that the average particle size of the magnesium alloy powder is less than 67 μm. In recent years, three-dimensional printers have been used in various fields. In addition to manufacturing parts and members using conventional processing techniques such as molding and grinding, the use of three-dimensional printers to manufacture parts and members is increasing. In particular, the use of three-dimensional printers has been increasing in the case of small-lot production of a wide variety of products and the production of prototypes.

This three-dimensional printer manufactures parts and members by laminating powder materials. Therefore, a powder material is required. At this time, it is preferable that the powder material used in the three-dimensional printer has a small particle size. Among them, being 67 μm or less is one standard for use in a three-dimensional printer.

Therefore, it is very preferable that the average particle size of the magnesium alloy powder of the present invention is less than 67 μm.

It should be noted that the particle size required for the powder material used may differ depending on the structure and type of the three-dimensional printer. Less than 67 μm is an example of this. Other sizes may be used as a reference.

Thus, the magnesium alloy powder of the present invention has a very small average particle size. In addition, the average particle size can also be adjusted according to the stage required in the application. As a result, it can be used appropriately for electrode materials, medical devices, paints, materials for laminated devices, and the like. By being able to use these materials, it will eventually be possible to apply them to the parts and members of electronic equipment, precision equipment, transportation equipment, and the like.

FIG. 2 is a photograph of magnesium alloy powder in Embodiment 1 of the present invention. Magnesium alloy powder 1 shown in the photograph of FIG. 2 was actually produced by the inventor. Magnesium alloy powder 1 is actually manufactured in a powder state.

Further, a solidified structure 2 grows inside the magnesium alloy powder 1 in the photograph of FIG. The solidified tissue 2 is the network-like black portion and the white portion surrounded by it in the photograph.

The average particle size of magnesium alloy powder 1 is based on the diameter of the circle shown in the photograph of FIG. The average grain size of the solidified structure 2 is based on the diameter of the white portion surrounded by the mesh-like black portion inside the photograph of FIG.

FIG. 3 is a photograph of magnesium alloy powders having different average particle diameters according to Embodiment 1 of the present invention. The photograph of FIG. 3 shows, from the left, magnesium alloy powder with a particle size of 46 μm, magnesium alloy powder with a particle size of 70 μm, and magnesium alloy powder with a particle size of 107 μm.

All of these are magnesium alloy powders actually produced by the inventors. The magnesium alloy with a particle size of 46 μm on the left is an example of magnesium alloy powder with an average particle size of less than 67 μm. The middle magnesium alloy powder with a particle size of 70 μm is an example of a magnesium alloy powder with an average particle size of less than 100 μm. The magnesium alloy powder with a particle size of 107 μm on the right is an example of magnesium alloy powder with an average particle size of less than 200 μm.

In this way, magnesium alloy powders with an average particle size of less than 200 μm can be produced in stages of less than 100 μm and less than 67 μm.

(coagulation tissue)
As shown in the photograph of FIG. 2, the magnesium alloy powder 1 contains a solidified structure 2 inside. During the process of manufacturing the magnesium alloy powder 1, the internal solidified structure grows.

The average grain size of the solidified structure 2 is less than 5 μm. Since the average grain size of the solidified structure 2 is very small in this way, the mechanical properties are improved. In particular, the mechanical properties of parts and members manufactured using the magnesium alloy powder 1 are also improved.

The magnesium alloy powder 1 not only has a small average particle size, but also has a small average particle size of the internal solidified structure 2. It also has high mechanical properties.

For example, members and parts that are layered and manufactured using the magnesium alloy powder 1 have high mechanical properties. For example, it has high mechanical strength. In addition, the mechanical properties of parts and structural materials made by processing this member are also high. In this way, by taking over the properties of the magnesium alloy powder 1, target parts and members can be manufactured.

(Calcium content)
Magnesium alloy powder contains calcium and magnesium. Other elements may additionally be included as needed.

Here, calcium is also preferably 0 to 20 mass% with respect to the whole. When the content of calcium is within this range, the flame retardancy of the magnesium alloy powder is improved without impairing the properties of magnesium (lightness, etc.) of the magnesium alloy powder.

(Powder shape)
As shown in FIGS. 2 and 3, the outer shape of the magnesium alloy powder is also preferably substantially spherical. FIGS. 2 and 3 show magnesium alloy powder actually produced by the inventor, and both of them have a substantially spherical outer shape. Being substantially spherical, it is suitable as a material for lamination molding.

This is because the substantially spherical shape facilitates use when used for lamination molding as in a three-dimensional printer. Moreover, in addition to facilitating use, the accuracy of members and parts manufactured by lamination molding is improved.

(Application)
The magnesium alloy powder 1 described above is used for various purposes. Among them, it is suitable to be used for manufacturing parts and members by lamination molding. This is because the powder form is optimal for additive manufacturing.

It is suitable to be used as a powder material for use in a three-dimensional printer that performs layered manufacturing. In recent years, 3D printers have been widely used at manufacturing sites and development sites. Materials containing magnesium as a main component are also in demand in the manufacture of members and parts using three-dimensional printers. This is because weight reduction is required.

Therefore, magnesium alloy powder 1 is most suitable for use in this three-dimensional printer. In addition, flame retardancy is realized by containing calcium.

Moreover, the magnesium alloy powder 1 is preferably used for electronic equipment, transportation equipment, precision equipment, electrode materials, medical devices, and paints. This is because these are also produced by hardening powder or by coating or vapor-depositing powder on a substrate.

Also in these applications, the lightness of magnesium and the flame retardancy due to the inclusion of calcium are suitable. In addition, since it is a powder and both the average particle size and the average particle size of the solidified structure are small, the production is easy and the mechanical properties after production are enhanced.

As described above, the magnesium alloy powder according to Embodiment 1 can be suitably used in various fields including additive manufacturing because of its small average particle size and average particle size of the solidified structure. In addition, since the average particle size is small, it is possible to expand the range of applications and improve the manufacturing accuracy. In addition, since the average grain size of the solidified structure is small, properties such as mechanical strength are improved.

(Embodiment 2)

Next, Embodiment 2 will be described. In Embodiment 2, a method for producing the magnesium alloy powder described in Embodiment 1 will be described.

(1) Method for producing alloy ingots As a procedure for producing magnesium alloy powder, it is necessary to first produce magnesium alloy ingots. FIG. 3 is a schematic diagram showing a method for producing a magnesium alloy ingot.

FIG. 4 illustrates an alloy called AZX912 as an example.

The ingot alloy is in the so-called solid form. In the prior art, the alloy powder was sometimes produced by cutting the alloy of this ingot.

The alloy of AZX912 is based on magnesium, aluminum, zinc and calcium. It may contain unavoidable mixtures, and other ingredients may be present depending on the precision of the raw materials used in the manufacturing process.

Here, this AZX912 magnesium alloy has a component composition of 9 mass% aluminum, 0.7 mass% zinc, 2 mass% calcium, 0.2 mass% manganese, and the balance magnesium.

1: Each element is weighed so as to obtain a predetermined composition ratio. As described above, it is weighed as 9 mass% aluminum, 0.7 mass% zinc, 2 mass% calcium, 0.2 mass% manganese, and the balance magnesium.
2: The weighed raw materials are put into a crucible and heated to melt. A molten metal is obtained.
3: After melting, stir so that the components are uniform. This is because the homogenization of the components realizes the uniformity of the quality of the manufactured ingots.
4: Cast into a mold at a molten metal temperature of 700°C and allow to cool.
5: After cooling, remove the solid ingot from the mold.

An ingot-type magnesium alloy is produced as described above. FIG. 5 shows a photograph of the produced magnesium alloy in the form of an ingot. FIG. 5 is a photograph of an ingot-type magnesium alloy manufactured by the inventor in Embodiment 2 of the present invention.

In addition, the composition ratio of the actually manufactured ingot-type magnesium alloy was measured. FIG. 6 shows the measurement results of the composition ratio of the magnesium alloy in ingot form. In the measurement, the magnesium alloy in ingot form was subjected to emission spectroscopic analysis using an analyzer "PDA-7000" manufactured by Shimadzu Corporation.

By this analysis, the composition ratios in FIG. 6 were confirmed. The composition ratio set in weighing is almost achieved.

(2) Manufacturing method of magnesium alloy powder Magnesium alloy powder is manufactured using the ingot-type magnesium alloy described in (1). FIG. 4 shows this manufacturing method.

FIG. 7 is a schematic diagram showing a method for producing magnesium alloy powder according to Embodiment 2 of the present invention. FIG. 7 shows the procedure of the manufacturing method and an example of a manufacturing apparatus.

The manufacturing apparatus shown in FIG. 7 is an example of a manufacturing apparatus used for the gas atomization method. The manufacturing apparatus includes a melting furnace 10 , a spray tank 11 and a recovery section 12 . The manufacturing process progresses through these elements in sequence. Starting from the melting furnace 10, the ingot manufactured in (1) is used.

1: The ingot is melted in the melting furnace 10 replaced with inert gas. Argon gas, nitrogen gas, helium gas and the like are available as inert gases. In this production example, argon gas was used.
2: Replace the spray tank 11 with an inert gas.
3: Molten magnesium alloy is dripped and an inert gas is blown. The blowing of the inert gas pulverizes the molten magnesium alloy.
4: Recover the powdered magnesium alloy powder from the recovery unit 12 .

Magnesium alloy powder is manufactured by the above steps.

FIG. 8 is a photograph of magnesium alloy powder produced in Embodiment 2 of the present invention. Magnesium alloy powder manufactured through manufacturing steps (1) and (2) is shown.

A magnesium alloy powder as shown in the photograph of FIG. 8 is produced. 2 and 3 are microscope enlarged photographs of the magnesium alloy powder produced as shown in this photograph.

Through such a production method, it is possible to produce a magnesium alloy powder that is in a powder state from the beginning, rather than a powder that has been scraped off by cutting or the like. Cutting or the like may result in a powder in which the solidified structure is not orderly or does not grow as shown in FIG. and

(Quantitative evaluation of manufactured magnesium alloy powder)

In Embodiment 1, the quantitative evaluation of the particle size of the magnesium alloy powder has been described. They are the particle size of the powder itself and the particle size of the solidified structure contained in the powder.

FIG. 9 is an explanatory diagram showing quantitative evaluation of magnesium alloy powder in Embodiment 2 of the present invention.

The particle size of each of the powders is "D" in FIG. The particle size of the magnesium alloy powder is measured by measuring the value from a micrograph or the like.

The grain size of the solidified structure is calculated as shown in FIG. The grain size of the solidified structure is calculated by dividing the circumference by the number of crystals intersecting the concentric circle of the powder cross section. Calculations are performed using the formulas shown in FIG.

Thus, the particle size of one magnesium alloy powder and the particle size of the solidified structure are calculated.

FIG. 10 shows the result of calculating the average particle size in an example of the magnesium alloy powder produced by the production method described in the second embodiment. FIG. 10 is a graph showing calculation results of the average particle size of the magnesium alloy powder produced in Embodiment 2 of the present invention.

(Measuring method)
The particle size of the manufactured magnesium alloy powder (there are many) is measured with the following measuring device.

Apparatus: Microtrack 9320/X100 HRA (manufactured by Nikkiso Co., Ltd.)
Dispersion medium for sample particles: Ion-exchanged water Measurement method: Magnesium alloy powder is flowed and circulated with ion-exchanged water. Measure. By repeating this, the particle size distribution and average particle size are calculated.

Magnesium alloy powder and ion-exchanged water are put into the measuring device, and the particle size of each is measured. The particle size of a number of magnesium alloy powders was measured and the particle size distribution is shown in the graph of FIG.

The grain size of the solidified structure was measured by the method described with reference to FIG.

(Measurement result 1: average particle size)
FIG. 10 is a graph showing the particle size distribution in Embodiment 2 of the present invention.

90% or more of the magnesium alloy powder measured has a particle size of less than 100 μm, and the average particle size is 47 μm. It was confirmed that a magnesium alloy powder satisfying the properties of the magnesium alloy powder described in Embodiment 1 could be produced.

(Measurement result 2: Average grain size of solidified structure)
FIG. 11 is a graph showing the average grain size distribution of the solidified structure in Embodiment 2 of the present invention. As is clear from the graph of FIG. 11, the average particle size of the solidified structure is less than 5 μm regardless of the difference in the average particle size of the powder.

A magnesium alloy powder is produced that satisfies the average grain size of the solidified structure, which is one of the characteristics of the magnesium alloy powder, as described in the first embodiment.

As described above, in Embodiment 2, the magnesium alloy powder described in Embodiment 1 could be produced, and its characteristics could be confirmed.

It should be noted that the magnesium alloy powder described in Embodiments 1 and 2 is merely an example for explaining the gist of the present invention, and includes modifications and alterations within the scope of the gist of the present invention.

REFERENCE SIGNS LIST 1 magnesium alloy powder 2 solidified structure 10 melting furnace 11 spray tank 12 recovery section

Claims (5)

calcium and
contains magnesium,
The calcium is 20 mass% or less with respect to the whole,
The average particle size of the powder is less than 100 μm,
The average grain size of the solidified structure is less than 5 μm,
The particle size shape of the powder is substantially spherical,
In the particle size distribution of the powder to be produced, the particle size of 90% or more of the powder as a whole is less than 100 μm,
Magnesium alloy powder used in 3D printers. 2. The magnesium alloy powder according to claim 1, wherein said calcium is 5 mass % to 20 mass % with respect to the whole. 9 mass% aluminum;
0.7 mass% zinc;
2 mass% calcium;
0.2 mass% manganese;
including magnesium and
The average particle size of the powder is less than 100 μm,
The average grain size of the solidified structure is less than 5 μm,
The particle size shape of the powder is substantially spherical,
In the particle size distribution of the powder to be produced, the particle size of 90% or more of the powder as a whole is less than 100 μm,
Magnesium alloy powder used in 3D printers. The magnesium alloy powder according to any one of claims 1 to 3, wherein said powder has an average particle size of less than 67 µm. 5. The magnesium alloy powder according to any one of claims 1 to 4, wherein said magnesium alloy powder does not contain oxides derived from water cooling in the manufacturing process.

Images