Method for quantitatively representing shape of molybdenum powder
A molybdenum powder and characterization technology is applied in the field of quantitative statistics of molybdenum powder particle morphology parameters, achieving the effects of slow calculation speed, fast calculation speed and reasonable design.
Active Publication Date: 2012-10-17
JINDUICHENG MOLYBDENUM CO LTD
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[0004] The technical problem to be solved by the present invention is to provide a method for quantitative characterization of molybdenum powder morphology, which is reasonable in design, convenient in implementation, low in investment cost, small in error, high in practical value, and can effectively Solve the practical problem that the existing molybdenum powder detection method cannot analyze the influence of molybdenum powder microstructure on the overall molybdenum powder quality, and effectively improve the yield of subsequent molybdenum products
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[0039] like figure 1 A molybdenum powder morphology quantitative characterization method shown comprises the following steps
[0040] Step 1. Sampling: Weigh 0.1-0.6g of molybdenum powder to be tested, the Fischer particle size of the molybdenum powder to be tested is 2.0μm-6.0μm and its loose specific gravity is 0.8g / cm 3 ~1.6g / cm 3 ; Put the weighed molybdenum powder sample into a sealed dispersion chamber and place it on the tin foil at the top, the upper part of the sealed sample chamber is provided with an air pressure pipeline connected with a high-pressure gas source and the air pressure pipeline is connected to the airtight The interior of the sample chamber is connected, and the air outlet of the air pressure pipeline is located above the tin foil.
[0041] During actual use, an observation window is provided on the side wall of the airtight sample chamber. In this embodiment, the airtight sample chamber is made of transparent glass, and its shape is a cube. When ...
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Abstract
The invention discloses a method for quantitatively representing the shape of molybdenum powder, which comprises the following steps of: 1, sampling; 2, dispersing a sample, namely instantaneously dispersing a molybdenum powder sample arranged on the top of a dispersing cavity by using compressed air, and freely settling to a flat glass slide at the bottom of the dispersing cavity; 3, standing the sample; 4, demarcating a measurement area; 5, acquiring an image and synchronously uploading the image; and 6, analyzing a molybdenum powder shape parameter and synchronously displaying the parameter, wherein the parameter analysis process comprises the following steps of: preprocessing the image, extracting a molybdenum powder particle boundary line, calculating and storing the equivalent circle diameter and roundness parameter of molybdenum powder particles according to the extracted molybdenum powder particle boundary line, and correspondingly making a volume distribution graph and a roundness distribution graph of the molybdenum powder particles. The method has a reasonable design, low investment cost, small errors and high practical value, is convenient to implement, can effectivelysolve the practical problem that the influence of a molybdenum powder microstructure on the whole molybdenum powder quality cannot be analyzed by the conventional molybdenum powder detection method, and effectively improves the yield of subsequent molybdenum products.
Description
technical field [0001] The invention belongs to the technical field of quantification and statistics of molybdenum powder particle morphology parameters, and in particular relates to a method for quantitative characterization of molybdenum powder morphology. Background technique [0002] At present, the global refractory metal powder metallurgy industry does not conduct two-dimensional quantitative analysis of the microscopic morphology of molybdenum powder, and can only use electron microscopy to qualitatively explain the shape and agglomeration of molybdenum powder, so it is impossible to accurately characterize the particle equivalent circle diameter, Roundness and convexity parameters, it is impossible to deeply analyze the influence of the basic unit of molybdenum powder particles on product quality. [0003] At present, when detecting molybdenum powder, the detection parameters mainly include chemical index detection and physical index detection, among which, chemical ...
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IPC IPC(8): G01B11/24G01N15/02
Inventor 韩强王峰曹维成张增祥张菊平刘振华
Owner JINDUICHENG MOLYBDENUM CO LTD