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A kind of preparation method of standard sample of galvanized steel sheet
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A technology for standard samples and galvanized steel sheets, applied in the preparation of test samples, etc., which can solve the problems of poor repeatability, large size deviation of standard samples, and unfavorable environmental protection.
Active Publication Date: 2021-06-08
BEIJING SHOUGANG COLD ROLLED SHEET
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[0002] After hot-dip galvanizing on the surface of the steel plate of the automobile plate, the zinc can form a film with good corrosion resistance on the surface in a corrosive environment. The weight of the zinc layer protecting the zinc coating itself and the surface of the steel-based galvanized sheet is an important indicator. Conventional The detection is carried out by chemical dissolution, but it is not conducive to the protection of the environment, and the repeatability is not good. Therefore, the role of non-destructive testing technology in the quality assurance system is increasingly showing its importance and necessity, and has become a control Product quality, an important means to ensure the safe operation of in-service equipment
However, its important role depends on the correct selection of non-destructive testing methods and the reliability of the test results. Therefore, the uniformity of standard samples is very important. Under the existing methods, reasonable sampling is the premise to ensure the production of standard samples, but processing standards Samples often exhibit large size deviations
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Embodiment 1
[0055] Such as figure 1 as shown, figure 1 A schematic flow diagram of a method for preparing a galvanized steel sheet standard sample provided in Embodiment 1 of the present invention, specifically comprising the following steps:
[0056] Select a sample with uniform coating and vertical edges, the size is about 230mm*230mm, such as figure 1 shown.
[0057] Before preparing the first standard sample S1, the second standard sample S2, the third standard sample S3, and the fourth standard sample S4, process the above-mentioned samples on the grinding wheel to form a vertical reference surface 1 (first reference surface), Reference plane 2 (second reference plane);
[0058] Punch out a 45mm disc test standard sample S1 on the punch press at a position greater than 25mm from the reference plane 1 and 2 for the processed sample, see Figure 2a ;
[0059] Align the reference plane 1 with a dial indicator, parallel to the horizontal movement direction of the workbench, fix the ...
Embodiment 2
[0066] Such as image 3 as shown, image 3 A schematic flow diagram of a method for preparing a galvanized steel sheet standard sample provided in Embodiment 2 of the present invention, specifically comprising the following steps:
[0067] Select an angle sample with uniform coating and non-perpendicular edges, with a size of about 230mm*230mm, as shown in Figure 3.
[0068] Use a punch press to punch a sample circular hole (central hole) in the center of the above-mentioned sample as a reference hole, and roughly draw the positions of the standard samples S1, S2, S3, and S4;
[0069] Utilize the stoppers with mutually perpendicular surfaces, align the reference plane with a dial indicator, parallel to the horizontal movement direction of the workbench, fix it on the workbench with a locking device, and align the main shaft concentrically with the above-mentioned round hole.
[0070] Stick the stopper with the standard block of LMU2, and keep the workbench still, the dial in...
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Abstract
The invention provides a method for preparing a standard sample of galvanized steel sheet, comprising the following steps: 1) selecting a galvanized steel sheet with uniform coating as a sample; 2) obtaining a first reference surface and a second reference surface perpendicular to each other of the sample; 3) open a reference hole on the sample; 4) fix the sample on the workbench; 5) contact the dial indicator contact with the first reference surface or the second reference surface, record the reading, and the percentage will When the meter remains unchanged, move the workbench vertically or laterally, put down the mark block or remove the mark block between the sample piece and the contact of the dial gauge, keep the original dial gauge reading, and process a sample on the sample piece. A plurality of standard samples; 6) remove the sample sheet as a sampling template; stick the sampling template on the galvanized steel coil, sample according to the hole spacing positions of each standard sample, and obtain a plurality of satellite samples. The invention guarantees the sampling distance requirement between standard samples, lays a foundation for the determination of subsequent standard samples, and thus obtains standard samples with small deviations.
Description
technical field [0001] The invention belongs to the technical field of sample preparation, in particular to a preparation method of a galvanized steel sheet standard sample. Background technique [0002] After hot-dip galvanizing on the surface of the steel plate of the automobile plate, the zinc can form a film with good corrosion resistance on the surface in a corrosive environment. The weight of the zinc layer protecting the zinc coating itself and the surface of the steel-based galvanized sheet is an important indicator. Conventional The detection is carried out by chemical dissolution, but it is not conducive to the protection of the environment, and the repeatability is not good. Therefore, the role of non-destructive testing technology in the quality assurance system is increasingly showing its importance and necessity, and has become a control Product quality is an important means to ensure the safe operation of in-service equipment. However, its important role depe...
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Application Information
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