Method for detecting number of inclusions in alloy powder

Abstract

The invention relates to a method for detecting the number of inclusions in alloy powder, and relates to the technical field of material analysis. According to the main technical scheme, the method for detecting the number of the inclusions in the alloy powder comprises the following steps that powder to be detected is subjected to first pressing treatment, and a first pressed sample is obtained; then, carrying out second pressing treatment on the first pressed sample in a protective atmosphere to obtain a detection sample; and detecting one or more detection samples by adopting a ray detection method to obtain the quantity of inclusions contained in the detection samples. The method is mainly used for improving the accuracy, high efficiency and comprehensiveness of inclusion quantity detection in the alloy powder.

Description

Technical Field

[0001] The present invention relates to the technical field of material analysis, and particularly to a method for detecting the inclusion quantity in alloy powder. Background Art

[0002] Powder inclusions are important indicators of powder materials and key factors for ensuring the mechanical properties of formed parts. The inclusions in alloy powders for additive manufacturing can be mainly divided into two categories, namely: metal inclusions and non-metal inclusions. Metal inclusions mainly come from aspects such as stainless steel sieves, powder storage tanks, and powder storage bottles. Non-metal inclusions mainly come from master alloys; specifically, non-metal inclusions in slag, thermal insulation materials, and furnace charges during vacuum melting may all become inclusion sources; therefore, the non-metal inclusions in the original powder are mainly ceramics, slag and other inclusions with various shapes, and their main chemical components are Al, Si, Ca, Ti, Mg, C, and the sizes also vary from several thousand micrometers to several hundred micrometers.

[0003] Factors such as the type, quantity, and size of inclusions in the powder will directly affect the mechanical properties and service life of the formed part. Currently, the detection methods specified in the national standard GB / T 39251-2020 (Additive Manufacturing - Methods for Characterizing the Properties of Metal Powders) are mainly three detection methods: microscopy method, scanning electron microscopy method, and industrial CT scanning method. However, the above three detection methods all have obvious limitations in the actual detection process, resulting in obvious deviations in the detection results.

[0004] For the existing microscopy method, its detection process is as follows: "Check through visual inspection and a stereomicroscope. Take 100 g of the powder to be tested and put it into a glassware with a diameter of 50 - 100 mm. First, conduct a visual inspection, and then carefully check the inclusions in the powder sample with a stereomicroscope." However, a stereomicroscope distinguishes inclusions by the difference in the light reflection ability of powders with different components. Through research, it is found that when using a stereomicroscope for detection, only the powder sample perpendicular to the light source can show the normal powder morphology, and the powder at the remaining angles will more or less reflect the light source (as Figure 1 shown), thus making it impossible to distinguish the existence of inclusions.

[0005] For the existing scanning electron microscope method, the detection is generally carried out in accordance with the General Rules for Analytical Scanning Electron Microscope Methods (JY / T 010-1996). However, this method first needs to distinguish the powder to be tested and the suspected inclusions in terms of morphology, and then uses an energy spectrum analyzer to determine the composition of the inclusions. In other words, if the powder to be tested and the suspected inclusions cannot be distinguished in terms of morphology, it is very easy to lead to the inability to determine the existence of inclusions. For other alloy powders mixed in, the powder to be tested and the inclusion powder are very close in terms of particle size and sphericity. Therefore, using this method will result in low accuracy and efficiency of the detection results. In addition, a method for detecting the inclusion content in ultra-fine titanium alloy powder for selective laser melting is disclosed in the relevant patent (201811204036.6). The accuracy of the detection results of this method depends on the preparation process of the powder sample. However, on the one hand, the number of powder samples taken is small, and the detection is not representative; on the other hand, in the sample preparation process (here the sample preparation process refers to spreading the powder on the conductive adhesive), inclusions in the powder will be lost, resulting in deviation of the detection results. Therefore, this method also cannot meet the detection requirements of inclusions.

[0006] Moreover, there are also two deficiencies in the existing industrial CT scanning method (GB∕T 39251-2020 Additive Manufacturing - Metal Powder Property Characterization Method) when directly detecting powder inclusions. On the one hand, the detection ability is insufficient, and on the other hand, the detection efficiency is extremely low. In terms of detection ability, since industrial CT is used for detection, the detection accuracy limit of industrial CT technology is 50μm, which makes it difficult to detect powder inclusions with a particle size less than 50μm. Moreover, post-image processing is also required (here the image processing is relatively complex, including: using reconstruction software to reconstruct the two-dimensional images collected by CT into three-dimensional stereo information; using processing software to adjust the contrast, brightness, etc. of the image globally and locally to make the image easy to observe; using fractional software to measure the surface of the three-dimensional stereo information of the sample and filter unnecessary substances such as air; using analysis software to observe the three-dimensional information of the sample layer by layer; selecting the gray value of the powder sample and using analysis software to identify inclusions in the sample). This leads to a decrease in the stability of the detection results. In addition, when using industrial CT equipment to detect the inclusion rate of powder, the detection cost is high and the detection efficiency is low. In terms of detection efficiency, the standard stipulates that the powder to be tested needs to be pre-treated in the detection environment for 12h before detection can be carried out. For industrial production, the same batch of powder often needs to be produced in more than a dozen furnaces, and each furnace of powder needs to be detected, which results in the detection time for each batch of powder being at least more than 180h, seriously affecting the production progress of the powder.

[0007] In addition, the related technology (CN108043586) proposes a method for detecting the content of non-metallic inclusions in metal powder. Among them, although this method can improve the detection efficiency, since it uses the electrostatic principle to detect inclusions, this method can only detect non-metallic inclusions and still cannot efficiently and accurately detect metal inclusions.

[0008] In summary, there is an urgent need for a method for detecting the number of inclusions in alloy powder for additive manufacturing to improve the detection accuracy and detection efficiency. Summary of the Invention

[0009] In view of this, the present invention provides a method for detecting the number of inclusions in alloy powder, and the main purpose is to improve the detection accuracy and detection efficiency.

[0010] To achieve the above object, the present invention mainly provides the following technical solutions: An embodiment of the present invention provides a method for detecting the number of inclusions in alloy powder for additive manufacturing, which includes the following steps: Step of preparing a test sample: performing a first pressing treatment on the powder to be tested to obtain a first pressed sample; then, performing a second pressing treatment on the first pressed sample under a protective atmosphere to obtain a test sample; Detection step: using a ray detection method to detect one or more of the test samples to obtain the number of inclusions contained in the test samples.

[0011] Preferably, in the step of preparing a test sample: putting the powder to be tested into a jacket for the first pressing treatment and the second pressing treatment, and removing the jacket to obtain a test sample.

[0012] Preferably, the first pressing treatment uses cold pressing treatment.

[0013] Preferably, the temperature of the first pressing treatment is room temperature, the deformation amount of the first pressing treatment is 40-60%, the pressure of the first pressing treatment is 300-500 MPa, and the time of the first pressing treatment is 30-60 min.

[0014] Preferably, the temperature of the second pressing treatment is 300-600 °C; the pressure of the second pressing treatment is 400-600 MPa; the time of the second pressing treatment is 1-4 h; the deformation amount of the second pressing treatment is 10-30%.

[0015] Preferably, the mass of the powder to be tested is not less than 600 g.

[0016] Preferably, the mass of the powder to be tested is not higher than 900 g.

[0017] Preferably, in the step of preparing the test sample: divide the powder to be tested into multiple portions, and then perform a first pressing process and a second pressing process on the multiple portions of the powder to be tested to obtain multiple test samples.

[0018] Preferably, in the step of preparing the test sample: divide the powder to be tested into 3 - 6 portions.

[0019] Preferably, in the testing step: based on the ray detection principle, detect one or more test samples, fill the voids in the detected image, and observe the filled image to obtain the number of inclusions contained in the sample.

[0020] Preferably, in the testing step: the detection method selected is the X - ray detection method or the micro - CT detection method.

[0021] Preferably, the particle size of the powder to be tested is less than 250μm.

[0022] Preferably, the powder to be tested is titanium alloy powder.

[0023] Preferably, the powder to be tested is alloy powder for additive manufacturing.

[0024] Compared with the prior art, the method for detecting the number of inclusions in the alloy powder of the present invention has at least the following beneficial effects: The embodiment of the present invention provides a method for detecting the number of inclusions in alloy powder, which includes the following steps: perform a first pressing process on the powder to be tested to obtain a first pressed sample; then, under a protective atmosphere, perform a second pressing process on the first pressed sample to obtain a test sample; use a ray detection method to detect the test sample to obtain the number of inclusions contained in the test sample. Here, the above steps are explained as follows: The present invention only needs to press the powder to be tested into a test sample for detection. Among them, in terms of detection efficiency, the present invention can detect multiple test samples simultaneously, while other existing methods require multiple detections. In terms of accuracy, this method of the present invention can press and prepare test samples for at least 600g of powder for detection, while the sample quality detected by other existing methods is less than 50g. Since the sampling quality is small, inclusion particles will be missed during sampling. In terms of the scientific nature of sample preparation, no powder loss will occur during the pressing process of the present invention, while other methods are prone to powder particle loss during sample preparation (such as spreading the powder on conductive glue), resulting in inaccurate inclusion particle numbers. It can be seen that compared with the existing detection methods, the method of the embodiment of the present invention is more scientific and accurate in the process of preparing test samples, and will not cause deviation of results due to sample preparation. At the same time, the present invention is significantly improved compared with the existing methods in terms of detection efficiency, accuracy, and comprehensiveness, and can more conveniently, accurately, comprehensively, and quickly detect the number of inclusions in the powder for additive manufacturing.

[0025] Furthermore, an embodiment of the present invention provides a method for detecting the inclusion quantity in alloy powder. By controlling the temperature (room temperature), pressure, and deformation amount of the first pressing process, and controlling the atmosphere, temperature, pressure, and deformation amount of the second pressing process, not only can the gaps between powder particles be eliminated as much as possible, but also detection samples with corresponding sizes can be prepared according to the requirements of the detection equipment, thereby effectively controlling the sample size, so as to detect more samples at one time and improve the detection efficiency.

[0026] Furthermore, an embodiment of the present invention provides a method for detecting the inclusion quantity in alloy powder. By randomly selecting the powder to be tested and evenly dividing the powder to be tested into multiple portions, and then performing the first pressing process and the second pressing process respectively to obtain multiple detection samples, and detecting the multiple detection samples, it can ensure that the sample preparation process will not affect the accuracy of the detection result.

[0027] Furthermore, an embodiment of the present invention provides a method for detecting the inclusion quantity in alloy powder, which uses X-ray (DR technology) or micro-CT detection to achieve high detection accuracy; the present invention can detect a large number of powders, has a high detection efficiency, and at the same time, the single detection time of the present invention is only about 1 hour; the sample preparation process of the present invention is more scientific and will not cause deviation of the detection result due to sample preparation.

[0028] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the accompanying drawings to elaborate in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a detection image of detecting inclusions in powder using a stereomicroscope in the prior art; Figure 2 is a detection image of Embodiment 1 of the present invention; Figure 2 In (a) of, it is a detection image of the first detection sample in Embodiment 1, Figure 2 In (b) of, it is a detection image of the second detection sample in Embodiment 1; Figure 2 In (c) of, it is a detection image of the third detection sample in Embodiment 1; Figure 2 In (d) of, it is a detection image of the fourth detection sample in Embodiment 1; Figure 3 is a detection image of Embodiment 2 of the present invention; Figure 3 In (a) of, it is a detection image of the first detection sample in Embodiment 2, Figure 3 In (b) of, it is a detection image of the second detection sample in Embodiment 2; Figure 3 In (c) of, it is a detection image of the third detection sample in Embodiment 2; Figure 4 It is the detection image of Embodiment 3 of the present invention; Figure 4 In (a) of it, it is the detection image of the first detection sample in Embodiment 3; Figure 4 In (b) of it, it is the detection image of the second detection sample in Embodiment 3; Figure 4 In (c) of it, it is the detection image of the third detection sample in Embodiment 3; Figure 4 In (d) of it, it is the detection image of the fourth detection sample in Embodiment 3; Figure 4 In (e) of it, it is the detection image of the fifth detection sample in Embodiment 3; Figure 4 In (f) of it, it is the detection image of the sixth detection sample in Embodiment 3; Figure 5 It is the morphology diagram of the powder after being laid flat in Comparative Example 1 of the present invention; among them, (a) is the macroscopic morphology diagram; (b) is the microscopic morphology diagram. Detailed implementation manners

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the attached drawings and preferred embodiments to detail the specific implementation manners, structures, features and their effects of the application according to the present invention. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0031] The embodiment of the present invention provides a method for detecting the inclusion quantity in alloy powder, and for the first time, it is proposed to perform a first pressing treatment on the powder to be measured to obtain a first pressed sample; then, under a protective atmosphere, perform a second pressing treatment on the first pressed sample to obtain a detection sample, which can ensure the scientificity and accuracy of the preparation of the powder to be measured. Then, by using X-ray (DR technology) or industrial CT detection technology to detect the detection sample, efficient and accurate detection of powder inclusions can be achieved. The method of the present invention has the advantages of simple operation, high detection efficiency and accuracy, and comprehensive detection. The solution of the present invention is specifically as follows: The embodiment of the present invention provides a method for detecting the inclusion quantity in alloy powder, mainly including the following steps: 1) Step of preparing a detection sample: Randomly extract the powder to be measured, and put the powder to be measured into a package for the first pressing treatment to obtain a first pressed sample; then, under a protective atmosphere, perform a second pressing treatment on the first pressed sample to remove the package and obtain a detection sample.

[0032] Preferably, the mass of the powder to be measured is not less than 600 g, and preferably not more than 900 g.

[0033] Preferably, the powder to be tested is evenly divided into multiple portions (3 - 6 portions), and then the first pressing treatment and the second pressing treatment are respectively carried out to obtain multiple test samples.

[0034] Preferably, the first pressing treatment is a cold pressing treatment (temperature is room temperature), and the deformation amount is 40 - 60%. The pressure of the first pressing treatment is 300 - 500 MPa, and the time of the first pressing treatment is 30 - 60 min.

[0035] Preferably, the temperature of the second pressing treatment is 300 - 600 °C, the pressure is 400 - 600 MPa, the time is 1 - 4 h, the deformation amount is 10 - 30%, the protective atmosphere is an inert gas, preferably argon or helium.

[0036] Preferably, the particle size of the powder to be tested is less than 250 μm. Preferably, the powder to be tested is a titanium alloy powder. Preferably, the powder to be tested is an alloy powder for additive manufacturing.

[0037] 2) Detection step: Using a ray detection method, the test samples are detected to obtain the number of inclusions contained in the test samples.

[0038] Preferably, in this step, the test samples are detected based on the ray detection principle, the voids in the detected image are filled, and the processed image is observed to obtain the number of inclusions contained in the test samples.

[0039] It should be noted here that: (1) The voids in the detection image come from the uncompacted part; (2) The void parts are filled through an image processing software (such as Photoshop, Picture Editor Assistant, Adobe Lightroom, etc.) to make the contrast between the voids and the material matrix consistent. The voids are black and the inclusions are highlighted; (4) All types of inclusions can be detected. The principle is that the contrast between the inclusions and the matrix is different under X - rays.

[0040] In addition, it should be noted that: The present invention only needs to fill the detection image, and the operation is simple.

[0041] Preferably, the ray detection method is X - ray (DR technology) or micro - CT detection, and inclusions of several microns can be detected.

[0042] The following is further illustrated by specific experimental examples as follows: Example 1 In this example, the number of inclusions in the TC4 alloy powder for additive manufacturing is detected, including the following steps: (1)Randomly extract 800 g of the powder to be tested, with a particle size range of 10 - 53 μm. Divide the powder to be tested evenly into 4 parts, and put the 4 parts of the powder to be tested into envelopes respectively for the first pressing treatment (cold pressing). The temperature of the first pressing treatment is room temperature, the pressure is 500 MPa, the pressing treatment time is 45 min, and the pressing deformation is 50%, obtaining 4 first-pressed samples. Under an argon atmosphere, perform the second pressing treatment on the 4 first-pressed samples respectively. The temperature of the second pressing treatment is 500 °C, the pressure of the second pressing treatment is 450 MPa, the time of the second pressing treatment is 2 h, and the pressing deformation is 20%, obtaining 4 test samples.

[0043] (2)Use micro-CT technology to perform ray detection on the 4 test samples, fill the voids in the detected image, and then observe the processed image to obtain the number of inclusions contained in the test samples.

[0044] Among them, in this embodiment, a total of 1 inclusion is detected in the 4 test samples. See Figure 2 Figures (a), (b), (c), and (d) shown therein. Only the first test sample detects 1 inclusion.

[0045] Example 2 This embodiment detects the number of inclusions in the Ti60 alloy powder for additive manufacturing, including the following steps: (1)Randomly extract 600 g of the powder to be tested (with a particle size of 75 - 180 microns), divide the powder to be tested evenly into 3 parts, and put the 3 parts of the powder to be tested into envelopes respectively for the first pressing treatment. Among them, the temperature of the first pressing treatment is room temperature, the pressure is 550 MPa, the pressing treatment time is 60 min, and the pressing deformation is 60%, obtaining 3 first-pressed samples. Under a helium atmosphere, perform the second pressing treatment on the 3 first-pressed samples respectively. The temperature of the second pressing treatment is 550 °C, the pressure of the second pressing treatment is 550 MPa, the time of the second pressing treatment is 1.5 h, and the pressing deformation is 15%, obtaining 3 test samples.

[0046] (2)Use industrial CT technology to perform ray detection on the 3 test samples, fill the voids in the detected image, and then observe the processed image to obtain the number of inclusions contained in the test samples.

[0047] A total of 3 inclusions are detected in the 3 test samples in this embodiment. See Figure 3 shown, see Figure 3 Figures (a), (b), and (c) shown therein. The first test sample detects two inclusions, the second test sample detects one inclusion, and the third test sample does not detect any inclusions.

[0048] Example 3 In this example, the inclusion quantity of Ti2AlNb alloy powder for additive manufacturing was detected, including the following steps: (1) Randomly extract 900 g of the powder to be tested (particle size: 75 - 250 microns), evenly divide the powder to be tested into 6 portions, and separately load the 6 portions of the powder to be tested into envelopes for the first pressing process; wherein, the temperature of the first pressing process is room temperature, the pressure of the first pressing process is 485 MPa, the deformation amount of the first pressing process is 55%, and 6 first-pressed samples are obtained. Under an argon atmosphere, perform a second pressing process on the 6 first-pressed samples respectively, wherein, the temperature of the second pressing process is 600 °C, the pressure of the second pressing process is 575 MPa, the time of the second pressing process is 2.5 h, and the pressing deformation amount is 10%, obtaining 6 detection samples.

[0049] (2) Use X-ray (DR technology) to perform ray detection on the 6 detection samples, fill the voids in the detected image, and observe the filled image, thereby obtaining the quantity of inclusions contained in the samples.

[0050] No inclusions were detected in the 6 detection samples in this example. Refer to Figure 4 Figures (a), (b), (c), (d), (e), and (f) shown.

[0051] Comparative Example 1 In Comparative Example 1, the inclusions in TC4 titanium alloy ultrafine powder were detected by the method of the existing technology, mainly including the following steps: 1) Detect the inclusions in TC4 titanium alloy ultrafine powder. The particle size range of the TC4 titanium alloy ultrafine powder is below 63 μm. Use a sampler to randomly take out 1 kg of powder in a device with an argon protection device. Wear powder-free rubber gloves during sampling to prevent introducing contaminants and affecting the detection results; 2) Randomly take out 20 g from the 1 kg of powder in the device with an argon protection device as the powder to be tested, and evenly divide the powder to be tested into 5 portions, each portion being 4 g. Wear powder-free rubber gloves during sampling to prevent introducing contaminants and affecting the detection results; 3) Stick the conductive adhesive on the stage, and evenly spread the powder on the conductive adhesive, avoiding excessive powder overlap; 4) Put the stage with the powder to be tested into a sputtering device for sputtering treatment. The sputtering parameters are: current 20 - 30 mA, vacuum degree < 10 Pa; 5) Put the prepared powder to be tested into a scanning electron microscope. The device parameters are: voltage 20 KV, current 128 - 133 mA; 6) Observe the morphology of the powder at a magnification of 10 - 8000 times in a scanning electron microscope to identify suspicious powder inclusions; 7) After identifying the suspicious powder inclusions, use the energy dispersive spectrometer (EDS) equipped with the scanning electron microscope to perform energy spectrum analysis on the suspicious powder inclusions to determine whether they are powder inclusions. The equipment parameters of the energy dispersive spectrometer are: voltage 20 KV, magnification 500 times; 8) Repeat the above steps 4 times to comprehensively detect 20 g of powder, and record the number of inclusion powders to evaluate the inclusion content in 20 g of powder, so as to determine whether the ultrafine TC4 titanium alloy powder meets the usage requirements.

[0052] The above steps for Comparative Example 1 have at least the following steps: 1. For step 2): In Comparative Example 1, finally 20 g of powder is extracted for detection, which is not representative compared to the 1 kg sample. When the sample is divided into 5 parts during sample sub-packaging, it will cause the loss of introduced inclusions, affecting the test results.

[0053] 2. For step 3): The macroscopic morphology after the powder is spread out is as shown in Figure 5 Figure (a); No matter how the powder is spread out, the powder will still overlap, and the inclusions at the bottom layer may be blocked by the upper-layer powder (see Figure 5 Figure (b), it can be seen that the bottom-layer powder is blocked by the upper-layer powder), and the scanning electron microscope can only detect the powder from a fixed perspective. Therefore, the inclusions at the bottom layer cannot be detected. At the same time, since only the bottom-layer powder will adhere firmly, the unadhered inclusions in the upper layer will fall off during the sample loading process.

[0054] 3. For step 4): During the gold spraying process, the unadhered inclusion powders will fall off, resulting in inaccurate test results.

[0055] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for detecting the inclusion quantity in an alloy powder, characterized in that, It includes the following steps: Step of preparing a test sample: performing a first pressing process on the powder to be tested to obtain a first pressed sample; then, performing a second pressing process on the first pressed sample under a protective atmosphere to obtain a test sample; Detection step: using a ray detection method to detect one or more of the test samples to obtain the number of inclusions contained in the test samples.

2. The method for detecting the inclusion quantity in the alloy powder according to claim 1, characterized in that In the step of preparing a test sample: Put the powder to be tested into a sheath for the first pressing process and the second pressing process, and after removing the sheath, obtain a test sample.

3. The method for detecting the inclusion quantity in the alloy powder according to claim 1, characterized in that, The first pressing process uses cold pressing.

4. The method for detecting the inclusion quantity in the alloy powder according to claim 2, wherein The temperature of the first pressing process is room temperature, the deformation amount of the first pressing process is 40 - 60%, the pressure of the first pressing process is 300 - 500 MPa, and the time of the first pressing process is 30 - 60 min.

5. The method for detecting the inclusion quantity in the alloy powder according to claim 1, characterized in that, The temperature of the second pressing process is 300 - 600 °C; the pressure of the second pressing process is 400 - 600 MPa; the time of the second pressing process is 1 - 4 h; the deformation amount of the second pressing process is 10 - 30%; the protective atmosphere is an inert gas.

6. The method for detecting the inclusion quantity in the alloy powder according to any one of claims 1-5, characterized in that, The mass of the powder to be tested is not less than 600 g.

7. The method for detecting the inclusion quantity in the alloy powder according to claim 6, characterized in that, The mass of the powder to be tested is not higher than 900 g.

8. The method for detecting the inclusion quantity in the alloy powder according to claim 6, characterized in that, In the step of preparing a test sample: Divide the powder to be tested into multiple portions, and then perform a first pressing process and a second pressing process on the multiple portions of the powder to be tested to obtain multiple test samples.

9. The method for detecting the inclusion quantity in the alloy powder according to claim 8, wherein In the step of preparing a test sample: divide the powder to be tested into 3 - 6 portions.

10. The method for detecting the inclusion quantity in the alloy powder according to claim 1, characterized in that, In the detection step: Based on the ray detection principle, detect one or more of the test samples, fill the voids in the detected image, and observe the filled image to obtain the number of inclusions contained in the sample.

11. The method for detecting the inclusion quantity in the alloy powder according to claim 1, wherein In the detection step: the detection method used is an X-ray detection method or a micro-CT detection method.

12. The method for detecting the inclusion quantity in the alloy powder according to claim 1, wherein The particle size of the powder to be tested is less than 250 μm.

13. The method for detecting the inclusion quantity in the alloy powder according to claim 1, wherein The powder to be tested is a titanium alloy powder.

14. The method for detecting the inclusion quantity in the alloy powder according to claim 1, wherein The powder to be tested is an alloy powder for additive manufacturing.

Images