Method for analyzing residual dust on surface of aluminum alloy plate

Abstract

The invention discloses a method for analyzing residual dust on the surface of an aluminum alloy plate, which comprises the following steps: S1, taking down the residual dust on the surface of the aluminum alloy plate by using a transparent adhesive tape to obtain a residual dust sample to be detected; s2, observing and photographing the residual dust sample to be detected by using an optical microscope to obtain a metallographic diagram of the residual dust sample on the surface of the aluminum alloy plate; and S3, analyzing the metallographic diagram of the residual dust sample on the surface of the aluminum alloy plate by utilizing analysis software, obtaining a unit view field through cutting, and analyzing the unit view field by adopting binary extraction, so as to obtain the content of the residual dust on the surface of the aluminum alloy plate. The method can effectively detect the content of dust (aluminum powder and dust) remaining on the surface of the aluminum alloy plate so as to judge whether the aluminum alloy plate meets the product requirement or not, further product defects caused in the subsequent rolling process are avoided, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy product analysis and relates to a method for analyzing residual dust on the surface of an aluminum alloy plate. Background Art

[0002] With the current proposal and application of lightweight aluminum alloy, aluminum alloy is gradually replacing the steel industry. At present, the production process of aluminum alloy is simple, and rolling, extrusion, integrated casting and other methods can be used, but aluminum is relatively soft. During the rolling and extrusion process, due to external dust or residual aluminum powder and dust (dust) from equipment falling on the aluminum plate, the surface of the aluminum plate will be damaged. At the least, the surface of the aluminum plate will appear different colors, bright spots, etc. after rolling, and at the worst, there will be defects such as scratches and holes. In order to timely grasp the content of residual aluminum powder and dust (dust) on the surface of the aluminum alloy plate, and effectively reduce the occurrence of debris or dust on the surface of the aluminum alloy plate during the processing of the aluminum plate, the current market uses the method of wiping with a paper towel to observe the content of residual aluminum powder and dust (dust) on the surface of the aluminum alloy. This method is extremely simple, but it cannot effectively observe the specific content of residual aluminum powder and dust (dust) on the surface of the aluminum alloy plate in a timely manner. Therefore, it is urgent to analyze the content of residual aluminum powder and dust (dust) on the surface of the aluminum alloy.

[0003] There have also been many studies on improving the aluminum powder and dust content on the surface of aluminum alloy plates in the prior art, including chemical methods, X-rays and other methods. For example, the document "Research Progress of Aluminum Ash Detection Technology" published with article number 167-3962 (2023) 10-0833-07 uses X-ray fluorescence spectroscopy, wet chemical analysis, and X-ray diffraction to measure the aluminum powder content. Chinese patent publication number CN 106546512A discloses a qualitative and quantitative detection method for residual aluminum powder on the surface of aluminum alloy plates and strips. After sampling with a metallographic microscope, take a picture directly, and judge by naked eyes which part of the content is aluminum powder. The chemical analysis method obtains the aluminum element content ppm (mass percentage) by dissolution, and then obtains the aluminum powder density. The above technology is mainly aimed at the research on the aluminum powder content on the surface of aluminum alloy, and its related research does not involve how to ensure the actual content of aluminum powder and dust generated on the surface of the aluminum plate in actual production (the content here refers to the area of ​​the aluminum powder and dust occupying the entire aluminum plate surface). Therefore, it is of great significance to develop an analysis method for residual aluminum powder and dust (dust) on the surface of aluminum alloy plate, so as to solve the problem of defects in the plate during processing caused by the increase of aluminum powder and dust on the surface of the aluminum plate, which in turn leads to a reduction in the material yield. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for analyzing residual dust on the surface of an aluminum alloy plate, which can effectively detect the content of residual dust (aluminum powder and dust) on the surface of an aluminum alloy plate, so as to determine whether the aluminum alloy plate meets the product requirements and avoid further product defects in the subsequent rolling process, which helps to improve production efficiency and product quality.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention provides a method for analyzing residual dust on the surface of an aluminum alloy plate, comprising the following steps:

[0007] S1, remove the residual dust on the surface of the aluminum alloy plate with a transparent tape to obtain a residual dust sample to be tested;

[0008] S2, using an optical microscope to observe and photograph the residual dust sample to be tested, and obtain a metallographic image of the residual dust sample on the surface of the aluminum alloy plate;

[0009] S3, using analysis software to analyze the metallographic image of the residual dust sample on the surface of the aluminum alloy plate, obtaining a unit field of view by cutting, and using binary extraction to analyze the unit field of view, thereby obtaining the content of residual dust on the surface of the aluminum alloy plate.

[0010] Preferably, in step S1, at least three residual dust samples to be tested are prepared.

[0011] Preferably, in step S2, the sample to be tested is photographed using ZENcore software connected to an optical microscope.

[0012] Preferably, in step S3, the analysis is performed using Prolmagling analysis software, and the metallographic image of the residual dust sample on the surface of the aluminum alloy plate is cut by a field of view tool to obtain a 1 mm 2 The unit field of view.

[0013] Preferably, in step S3, when the unit field of view is analyzed using binary extraction, all aluminum powder and dust particles in the unit field of view are extracted, and the dust area and proportion in the unit field of view are obtained through the two-phase area content, thereby obtaining the area content of residual dust on the surface of the aluminum alloy plate.

[0014] The method for analyzing residual dust on the surface of an aluminum alloy plate provided by the present invention has the following beneficial effects:

[0015] 1. The residual dust analysis method on the surface of the aluminum alloy plate of the present invention can quickly obtain the proportion and content of residual aluminum powder and dust (dust) on the surface of the aluminum alloy plate by sampling and analysis according to the needs of different plates (the content here is the area of ​​the aluminum powder and dust on the entire aluminum plate surface). This method is highly operable and has good promotion value;

[0016] 2. The present invention studies the content of residual aluminum powder and dust (dust) on the surfaces of different aluminum alloys to obtain the adverse factors affecting the surface quality of aluminum alloy plates, thereby further determining the rolling methods of different alloys under different processes. The present invention can quantify the data of residual aluminum powder and dust (dust) on the surfaces of aluminum alloy plates, which is beneficial for the workshop to adjust the rolling process in time according to the quantitative data during the production process, so as to improve the performance, quality and efficiency of aluminum alloy plates, promote the development of lightweight automobiles, and thus achieve the goal of green, environmental protection, energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 It is a flow chart of the residual dust analysis method of the aluminum alloy plate surface of the present invention;

[0019] Figure 2 A 1 mm cut in the method of the present invention 2 Schematic diagram of unit field of view;

[0020] Figure 3 for Figure 2 Middle 1mm 2 Dust distribution map within the unit field of view;

[0021] Figure 4 for Figure 2 Middle 1mm 2 Dust distribution data within the unit field of view. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with embodiments.

[0023] In view of the problems of black spots, discoloration, stripes, etc. on the surface of aluminum plates caused by residual aluminum powder and dust (dust) on the surface of aluminum alloys, it is impossible to use data to timely determine the content of residual aluminum powder and dust (dust) on the surface of aluminum plates; in order to effectively prevent the occurrence of debris or dust on the surface of aluminum plates during the processing of aluminum plates, which in turn causes scratches, discoloration and other defects on the surface of aluminum plates, affecting product quality. The present invention uses adhesive tape to remove the residual aluminum powder and dust (dust) on the white surface of aluminum alloys, uses an optical microscope to take pictures of the residual aluminum powder and dust (dust) at different magnifications, and uses analysis software to analyze the residual aluminum powder and dust (dust) after taking pictures; according to the analysis data, the content of residual aluminum powder and dust (dust) on the surface of aluminum alloys is judged, so as to adjust the rolling process.

[0024] Combination Figure 1 As shown, the present invention provides a method for analyzing residual dust on the surface of an aluminum alloy plate, comprising the following steps:

[0025] S1, remove the residual dust on the surface of the aluminum alloy plate with a transparent tape to obtain a residual dust sample to be tested;

[0026] In this step, take an aluminum alloy plate from the workshop and stick it on the surface of the aluminum alloy plate with transparent tape. It should be noted that no bubbles should be generated when sticking the tape and the tape and the aluminum alloy plate should be tightly attached. Then remove the transparent tape from the aluminum alloy plate surface to obtain the residual dust sample to be tested. Among them, in order to ensure accurate experimental data in the future, at least 3 residual dust samples to be tested are prepared, and the sampling position of the residual dust sample to be tested needs to be determined according to the on-site conditions and the purpose of the test, such as along the rolling direction of the aluminum alloy plate, the head, tail and middle of the aluminum alloy plate, etc.

[0027] S2, using an optical microscope to observe and photograph the residual dust sample to be tested, and obtain a metallographic image of the residual dust sample on the surface of the aluminum alloy plate;

[0028] In this step, the residual dust sample to be tested is placed on an optical microscope, and the ZENcore software connected to the optical microscope is used to take a photo of the sample to be tested, so as to obtain a metallographic image of the residual dust sample on the surface of the aluminum alloy plate;

[0029] S3, using analysis software to analyze the metallographic image of the residual dust sample on the surface of the aluminum alloy plate, obtaining a unit field of view by cutting, and using binary extraction to analyze the unit field of view, thereby obtaining the content of residual dust on the surface of the aluminum alloy plate.

[0030] In this step, the Prolmagling analysis software is used for analysis. The metallographic image of the residual dust sample on the surface of the aluminum alloy plate is opened, and the square icon in the field of view tool is clicked to cut the metallographic image to obtain 1mm 2 The unit field of view is as follows: Figure 2Then click Binary Extraction to extract all aluminum powder and dust particles in the unit field of view, and move the red line in the color range so that the red points cover all the aluminum powder and dust on the sample surface. Figure 3 Then click on the special analysis - two-phase area content, and then get the phase area and phase ratio. Since the phases in the unit field of view are the marked aluminum powder and dust particles, the phase area content and phase ratio in the figure are equivalent to 1mm 2 The area content and ratio of dust (aluminum powder and dust) per unit field of view, from which the area content of residual dust on the surface of the aluminum alloy plate is obtained, see Figure 4 shown.

[0031] The present invention can efficiently analyze the area content of residual dust on the surface of aluminum alloy plates, and the acquired data is accurate. Subsequently, the residual dust area content under different processes of different products can be used to quickly know whether the corresponding production process meets the product requirements, thereby avoiding defects caused by subsequent processing that lead to material scrapping and other phenomena that affect product quality, which helps to improve production efficiency and improve product quality.

[0032] The method for analyzing residual dust on the surface of an aluminum alloy plate of the present invention is further introduced below with reference to specific examples.

[0033] Example 1

[0034] The material in this embodiment is 6014 aluminum alloy plate, the size is 500x200mm, the tools used are tape, 20cm ruler, scissors, and the instrument used is an optical microscope. The method for analyzing residual dust on the surface of the aluminum alloy plate in this embodiment is as follows:

[0035] (1) Take a 6014 aluminum alloy plate from the workshop, remove the residual dust on the surface of the aluminum alloy plate with transparent tape, and obtain three residual dust samples with a size of 60x60mm to be tested;

[0036] (2) placing the residual dust samples to be tested on an optical microscope and taking pictures using ZENcore software to obtain metallographic images of the residual dust samples on the surfaces of the three aluminum alloy plates and save them;

[0037] (3) Use Prolmagling analysis software to analyze the three metallographic images respectively. Click the square icon in the field of view tool in the software to cut the metallographic images to obtain 1mm 2 Unit field of view, and save;

[0038] (4) Click on the binary extraction in the Prolmagling analysis software to extract the 1mm 2All dust particles including aluminum powder and dust in the unit field of view are extracted, and the red line in the color interval is moved so that the red points completely cover the dust particles including aluminum powder and dust in the unit field of view.

[0039] (5) Click on the Special Analysis - Two-phase Area Content in the Prolmagling analysis software to obtain the phase area and phase ratio, thereby obtaining 1mm 2 The area content and proportion of the internal dust are used to obtain the content of residual dust on the surface of the aluminum alloy plate. The specific results are shown in Table 1.

[0040] Table 1 Residual dust content on the surface of 6014 aluminum alloy plate

[0041]

[0042] Combined with Table 1, it can be seen that the surface residual dust (aluminum powder and dust) content of the 6014 aluminum alloy plate in the three fields of view is evenly distributed, and the surface residual dust content is in the range of 5.9% to 6.6%. From the perspective of proportion analysis, the residual dust on the surface of the 6014 aluminum alloy plate is more distributed. The production process of the 6014 aluminum alloy plate needs to be improved. In order to avoid defects caused by subsequent processing, the residual dust on the surface of the 6014 aluminum alloy plate needs to be removed before processing to avoid material scrapping and improve product quality.

[0043] Example 2

[0044] The material in this embodiment is 6451 aluminum alloy plate, with a size of 500x200mm. The tools used are tape, 20cm ruler, and scissors. The instrument used is an optical microscope. This embodiment adopts the method in Example 1, and the content of residual dust on the surface of the aluminum alloy plate is measured as shown in Table 2.

[0045] Table 2 Residual dust content on the surface of 6451 aluminum alloy plate

[0046]

[0047] Combined with Table 1, it can be seen that the surface residual dust (aluminum powder and dust) content of the 6451 aluminum alloy plate in the three fields of view is evenly distributed, and the surface residual dust content is in the range of 6.3% to 7.1%. From the perspective of proportion analysis, the surface residual dust of the 6451 aluminum alloy plate is more distributed. The production process of the 6451 aluminum alloy plate needs to be improved. In order to avoid defects caused by subsequent processing, the residual dust on the surface of the 6451 aluminum alloy plate needs to be removed before processing to avoid material scrapping and improve product quality.

[0048] Example 3

[0049] The material in this embodiment is 5182 aluminum alloy plate, with a size of 500x200mm. The tools used are tape, 20cm ruler, and scissors. The instrument used is an optical microscope. This embodiment adopts the method in Example 1, and the content of residual dust on the surface of the aluminum alloy plate is measured. The results are shown in Table 3.

[0050] Table 3 Residual dust content on the surface of 5182 aluminum alloy plate

[0051]

[0052] Combined with Table 1, it can be seen that the surface residual dust (aluminum powder and dust) content of the 5182 aluminum alloy plate in the three fields of view is evenly distributed, and the surface residual dust content is in the range of 3.1-4.1%. From the perspective of proportion analysis, the surface residual dust of the 5182 aluminum alloy plate is less distributed, and the production process of the 5182 aluminum alloy plate basically meets the product requirements.

[0053] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for analyzing residual dust on the surface of an aluminum alloy plate, characterized in that: The following steps are involved: S1, remove the residual dust on the surface of the aluminum alloy plate with a transparent tape to obtain a residual dust sample to be tested; S2, using an optical microscope to observe and photograph the residual dust sample to be tested, and obtain a metallographic image of the residual dust sample on the surface of the aluminum alloy plate; S3, using analysis software to analyze the metallographic image of the residual dust sample on the surface of the aluminum alloy plate, obtaining a unit field of view by cutting, and using binary extraction to analyze the unit field of view, thereby obtaining the content of residual dust on the surface of the aluminum alloy plate.

2. The method for analyzing residual dust on the surface of an aluminum alloy plate according to claim 1, characterized in that: In the step S1, at least three residual dust samples to be tested are prepared.

3. The method for analyzing residual dust on the surface of an aluminum alloy plate according to claim 1, characterized in that: In the step S2, the sample to be tested is photographed using ZENcore software connected to an optical microscope.

4. The method for analyzing residual dust on the surface of an aluminum alloy plate according to claim 1, characterized in that: In step S3, the Prolmagling analysis software is used to analyze and the metallographic image of the residual dust sample on the surface of the aluminum alloy plate is cut by the field of view tool to obtain a 1 mm 2 The unit field of view.

5. The method for analyzing residual dust on the surface of an aluminum alloy plate according to claim 1, characterized in that: In step S3, when the unit field of view is analyzed by binary extraction, all aluminum powder and dust particles in the unit field of view are extracted, and the dust area and proportion in the unit field of view are obtained by the two-phase area content, thereby obtaining the area content of residual dust on the surface of the aluminum alloy plate.

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