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Method for detecting granularity and sphericity of titanium alloy ultrafine powder for laser selective melting

A technology of laser selective melting and detection method, applied in particle size analysis, particle and sedimentation analysis, measuring device and other directions, can solve the problems of large fluctuation, inaccurate test results of titanium alloy powder particle size and sphericity, etc. Wide range of effects to resolve inaccurate detection results

Pending Publication Date: 2019-09-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] In order to overcome the above problems, the object of the present invention is to provide a detection method for the particle size and sphericity of titanium alloy ultrafine powder for laser selective melting, which can accurately and quickly detect the particle size and sphericity of powder for laser selective melting, and solve the existing problems. The particle size and sphericity test results of titanium alloy powder are inaccurate and fluctuate greatly, providing theoretical support for the application of laser selective melting

Method used

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  • Method for detecting granularity and sphericity of titanium alloy ultrafine powder for laser selective melting
  • Method for detecting granularity and sphericity of titanium alloy ultrafine powder for laser selective melting

Examples

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Embodiment 1

[0051] In the present embodiment, the detection method of TC4 titanium alloy superfine powder particle size and sphericity comprises the following steps:

[0052] (1) Before testing, clean all glassware and sample spoons with water and alcohol in sequence, and fully dry the cleaned glassware and sample spoons to remove residual moisture on the inner and outer surfaces.

[0053] (2) Randomly draw 5 samples of the powder to be tested from the powder storage tank, 1g each time, and shake the powder storage tank upside down twice before each extraction.

[0054] (3) Weigh 10ml of the dispersant with a glass measuring cylinder.

[0055] (4) Put the weighed powder to be tested into a glass beaker, add 10ml of dispersant, and stir well.

[0056] (5) Add deionized water to 100ml, and use a disperser to ultrasonically disperse for 7 minutes, and remove air bubbles on the surface of the suspension during the dispersing process.

[0057] (6) if Figure 1-Figure 2 As shown, the dispers...

Embodiment 2

[0061] In the present embodiment, the detection method of Ti60 alloy superfine powder particle size and sphericity comprises the following steps:

[0062] (1) Before testing, clean all glassware and sample spoons with water and alcohol in sequence, and fully dry the cleaned glassware and sample spoons to remove residual moisture on the inner and outer surfaces.

[0063] (2) Randomly draw 8 samples of the powder to be tested from the powder storage tank, 0.5g each time, and shake the powder storage tank upside down 3 times before each extraction.

[0064] (3) Weigh 8ml of the dispersant with a glass measuring cylinder.

[0065] (4) Put the weighed powder to be tested into a glass beaker, add 8ml of dispersant, and stir well.

[0066] (5) Add deionized water to 80ml, and use a disperser to ultrasonically disperse for 10 minutes, and remove air bubbles on the surface of the suspension during the dispersing process.

[0067] (6) if Figure 1-Figure 2 As shown, the dispersed sus...

Embodiment 3

[0071] In this example, Ti 2 The detection method of AlNb alloy superfine powder particle size and sphericity comprises the following steps:

[0072] (1) Before testing, clean all glassware and sample spoons with water and alcohol in sequence, and fully dry the cleaned glassware and sample spoons to remove residual moisture on the inner and outer surfaces.

[0073](2) Randomly extract 4 samples of the powder to be tested from the powder storage tank, 1.5g each time, and shake the powder storage tank upside down once before each extraction.

[0074] (3) Weigh 12ml of the dispersant with a glass measuring cylinder.

[0075] (4) Put the weighed powder to be tested into a glass beaker, add 12ml of dispersant, and stir well.

[0076] (5) Add deionized water to 90ml, and use a disperser to ultrasonically disperse for 5 minutes, and remove air bubbles on the surface of the suspension during the dispersing process.

[0077] (6) if Figure 1-Figure 2 As shown, the dispersed suspens...

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Abstract

The invention relates to the field of titanium alloy additive manufacturing, and in particular to a method for detecting granularity and sphericity of titanium alloy ultrafine powder for laser selective melting. The method comprises the following steps of: 1) before detecting, cleaning all apparatus by adopting water and alcohol and fully drying; 2) randomly extracting a powder sample from to-be-detected powder, wherein the powder is uniformly shaken before extraction; 3) weighing a dispersing agent by adopting a glass measuring cylinder; 4) fully mixing the weighed to-be-detected powder withthe dispersing agent and uniformly stirring; 5) preparing a suspension liquid and fully dispersing by adopting a disperser; 6) putting the dispersed suspension liquid in a dynamic image analyzer and putting a sample guiding tube in a fixing clamp; and 7) inputting sample information and starting the detection. The method disclosed by the invention has the advantage that the granularity and the sphericity of the titanium alloy ultrafine powder for the laser selective melting can be accurately and quickly detected.

Description

technical field [0001] The invention relates to the field of titanium alloy additive manufacturing, in particular to a method for detecting the particle size and sphericity of titanium alloy ultrafine powder for laser selective melting. Background technique [0002] High-energy beam additive manufacturing technology, also known as 3D printing technology, is a high-tech integrated from three-dimensional digital model conceptual design to three-dimensional solid flexible manufacturing. An advanced manufacturing technology that integrates multiple disciplines such as heat source, computer, and digital modeling. According to the order in which materials and energy arrive at the deposition point, it can be divided into selective melting technology and cladding deposition technology. Laser beams and electron beams are commonly used as heat sources in industrial manufacturing. With the continuous development of additive manufacturing technology, this technology has formed three k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N15/00
CPCG01N15/0227G01N15/00
Inventor 蔡雨升杨锐吉海宾雷家峰常楠
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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