Metal strip metallographic sampling scale and sampling method

Abstract

The invention relates to a metal strip metallographic sampling scale and a sampling method, and is characterized in that the sampling scale comprises a square stainless steel scale, a plurality of strip width lines are respectively arranged on the front side and the back side of the scale in the transverse direction and the longitudinal direction, and strip width proportion scale marks are arranged at the upper corner, the lower corner, the left corner and the right corner of the square stainless steel scale; the sampling method comprises the following steps of: measuring metal strips with different specifications by adopting the sampling ruler, marking on the strips after measurement, connecting lines according to the marks, finally cutting a plurality of longitudinal metal strip samples according to the connecting lines, and finally cutting a plurality of transverse samples to finish sampling. The device has the advantages that the requirement of the national standard on the sampling length of the metal strip is met; the operation is simple and convenient, time and labor are saved, and the working efficiency of metallographic detection is improved; and errors caused by manual operation are avoided to a great extent.

Description

Technical Field

[0001] The invention belongs to the field of metal material detection, and in particular relates to a metal strip metallographic sampling scale and a sampling method. Background Art

[0002] Metallographic testing of metal strip involves microscopic observation of non-metallic inclusions and internal structures within the metal strip using a microscope. This provides a basis for adjusting process steps and modifying process parameters, guiding production, and analyzing failure causes of the metal strip. Sampling is crucial to ensuring the accuracy and reliability of test results. Metal strip is a thin, rolled steel strip with a certain degree of directionality. Depending on the testing requirements, longitudinal and transverse specimens of the metal strip must be taken. Due to the small thickness of the specimens, they must be bundled and mounted before being ground, polished, and then inspected under a microscope. Specimens can be mounted using two methods: cold mounting, mechanical mounting, and resin mounting, as well as hot mounting. Hot mounting is commonly used because it does not damage the surface film of the steel strip, is time-efficient, and has lower consumable costs.

[0003] The original sampling method is as follows: (1) Draw two horizontal lines parallel to the main deformation direction (longitudinal direction) on the metal strip sample reserved in the workshop to mark the direction of the metal strip sample; (2) Cut 5 samples with a length of about 15 mm from the metal strip sample, and then cut these 5 samples in half; (3) Classify the 10 cut sample pieces, and classify them into 5 samples parallel to the main deformation direction of the steel plate as the longitudinal direction and 5 samples perpendicular to the main deformation direction of the steel plate as the transverse direction.

[0004] (Because 100mm was proposed after December 1, 2023, it was moved to page 22. I don’t know if it is appropriate.) From December 1, 2023, the new national standard "Standard for the determination of non-metallic inclusions in steel - Microscopic examination method" (GB / T10561-2023) will be implemented, which has clear requirements for sampling methods. The current standard clause 5.2 requires that "the polishing area of ​​the sample used to measure the inclusion content should be 200mm 2 (20mm×10mm). The polishing surface should be parallel to the main deformation direction of the steel and located in the middle position between the outer surface and the center of the steel. When the thickness, diameter or wall thickness of the product is small, a sufficient number of samples should be cut from the same sample to ensure that the total polishing area is 200mm 2 , and these specimens are regarded as one specimen; when the total length of continuous sampling in the main deformation direction reaches 100mm as one specimen, the polishing area is less than 200mm 2 It is allowed. "Clause 5.4" The sampling method shall be specified in the product standard or agreement. If the product standard or agreement does not specify, the sampling method shall be carried out as follows: Steel plates with a nominal thickness less than or equal to 25mm: the inspection surface shall be the full thickness section at 1 / 4 of the width. After the implementation of the new national standard, the original sampling method mainly has the following problems: 1. The longitudinal sample intercepted according to the original method has a detection area less than 200 mm 2 And the total length is less than 100 mm.

[0005] 2. The sample according to the sampling method needs to be polished for a long time, and the full-thickness section at about 1 / 4 of the width of the metal strip is polished, and the detection position is not accurate.

[0006] 3. According to the current national standard "Standard Grading Microscopic Test Method for Determining Non-metallic Inclusion Content in Steel", the sampling method measured by the conventional ruler is complicated, low in work efficiency, and large in error. For example, the most common width of the metal strip in the market is 31.75 mm, the longitudinal sample is taken: (1) the length of the longitudinal sample is 100 mm, which is measured by the ruler from the metal strip product reserved in the workshop; (2) the width of the 1 / 4 of the upper and lower edges of the metal strip is calculated according to the width of the metal strip 31.75 mm, which is 7.94 mm and 23.82 mm respectively; (3) the detection surface scale of 7.94 mm and 23.82 mm is marked on the left and right sides of the longitudinal sample respectively, and the same detection surface scale on the left and right sides is connected and marked; (4) the longitudinal sample is cut according to the connection; the transverse sample is taken: (5) two sections of the metal strip with a length of about 15 mm are cut from the steel strip (6) the detection surface scale of 1 / 2 of the width of the transverse sample is calculated and measured, which is 15.88 mm, and is marked; (7) the transverse sample is cut according to the mark.

[0007] The sampling is carried out by using the conventional ruler measurement, and each metal strip sample needs to be measured at least four times, and the multiple measurement steps not only take a long time, but also increase the measurement error.

[0008] In addition, due to the continuous development of new products, the original method also has certain limitations for the steel strip products with large width. SUMMARY

[0009] In order to solve the above technical problems, the purpose of the present application is to provide a metal strip metallographic sampling ruler and a sampling method, The purpose of the present application is achieved.

[0010] The metal strip metallographic sampling ruler of the present application is characterized in that it comprises a square stainless steel ruler, a plurality of strip width lines are arranged on the front and back of the ruler in the transverse and longitudinal directions, and strip width proportional scale lines are arranged on the upper, lower, left and right corners of the square stainless steel ruler. The front face of the scale is provided with a longitudinal tape width line B1 at a position 16.00 mm from the left edge of the scale; between the right edge of the scale and the longitudinal tape width line B1, a longitudinal tape width line B2 is provided at a position 25.40 mm from the right edge of the scale; between the right edge of the scale and the longitudinal tape width line B2, a longitudinal tape width line B3 is provided at a position 12.70 mm from the right edge of the scale; The front face of the scale is provided with a longitudinal tape width line B1 at a position 16.00 mm from the left edge of the scale; between the right edge of the scale and the longitudinal tape width line B1, a longitudinal tape width line B2 is provided at a position 25.40 mm from the right edge of the scale; between the right edge of the scale and the longitudinal tape width line B2, a longitudinal tape width line B3 is provided at a position 12.70 mm from the right edge of the scale; The upper left corner and the upper right corner of the front face of the scale are provided with a scale line at the 1 / 4 width of the 31.75 mm wide tape, respectively at a position 7.94 mm from the upper edge of the scale, and at a position 15.88 mm from the upper edge of the scale, and at a position 23.82 mm from the upper edge of the scale; The upper left corner and the upper right corner of the front face of the scale are provided with a scale line at the 1 / 4 width of the 31.75 mm wide tape, respectively at a position 7.94 mm from the upper edge of the scale, and at a position 15.88 mm from the upper edge of the scale, and at a position 23.82 mm from the upper edge of the scale; The upper left corner and the upper right corner of the front face of the scale are provided with a scale line at the 1 / 4 width of the 31.75 mm wide tape, respectively at a position 7.94 mm from the upper edge of the scale, and at a position 15.88 mm from the upper edge of the scale, and at a position 23.82 mm from the upper edge of the scale; The upper left corner and the upper right corner of the front face of the scale are provided with a scale line at the 1 / 4 width of the 31.75 mm wide tape, respectively at a position 7.94 mm from the upper edge of the scale, and at a position 15.88 mm from the upper edge of the scale, and at a position 23.82 mm from the upper edge of the scale; The upper left corner and the upper right corner of the front face of the scale are provided with a scale line at the 1 / 4 width of the 31.75 mm wide tape, respectively at a position 7.94 mm from the upper edge of the scale, and at a position 15.88 mm from the upper edge of the scale, and at a position 23.82 mm from the upper edge of the scale;

[0011] The back face of the scale is provided with longitudinal tape width lines A3 and A4 at positions 40.00 mm and 45.00 mm from the upper edge of the scale, and longitudinal tape width lines A5 and A6 at positions 60.00 mm and 65.00 mm from the lower edge of the scale; The scale reverse side, longitudinally from left to right, the position of 70.00mm and 75.00mm from the left edge of the scale is set with the longitudinal strip width line B4 and B5; from right to left, the position of 50.00mm and 55.00mm from the right edge of the scale is set with the longitudinal strip width line B6 and B7; The upper left corner and the upper right corner of the scale reverse side, respectively from top to bottom, the position of 10.00mm from the upper edge of the scale is set with the scale line at the 1 / 4 width of the 40.00mm strip; from top to bottom, the position of 20.00mm from the upper edge of the scale is set with the scale line at the 1 / 2 width of the 40.00mm strip; from top to bottom, the position of 30.00mm from the upper edge of the scale is set with the scale line at the 1 / 4 width of the 40.00mm strip; The upper left and right edge of the scale reverse side, respectively from top to bottom, the position of 11.25mm from the upper edge of the scale is set with the scale line at the 1 / 4 width of the 45.00mm strip; from top to bottom, the position of 22.50mm from the upper edge of the scale is set with the scale line at the 1 / 2 width of the 45.00mm strip; from top to bottom, the position of 33.75mm from the upper edge of the scale is set with the scale line at the 1 / 4 width of the 45.00mm strip; The lower left corner and the lower right corner of the scale reverse side, respectively from bottom to top, the position of 15.00mm from the lower edge of the scale is set with the scale line at the 1 / 4 width of the 60.00mm strip; from bottom to top, the position of 30.00mm from the lower edge of the scale is set with the scale line at the 1 / 2 width of the 60.00mm strip; from bottom to top, the position of 45.00mm from the lower edge of the scale is set with the scale line at the 1 / 4 width of the 60.00mm strip; The lower left and right edge of the scale reverse side, respectively from bottom to top, the position of 16.25mm from the lower edge of the scale is set with the scale line at the 1 / 4 width of the 65.00mm strip; from bottom to top, the position of 32.50mm from the lower edge of the scale is set with the scale line at the 1 / 2 width of the 65.00mm strip; from bottom to top, the position of 48.75mm from the lower edge of the scale is set with the scale line at the 1 / 4 width of the 65.00mm strip; The scale reverse side, from bottom to top, the position of 50.00mm from the lower edge of the scale is set with the scale line 50.00mm, so as to measure the longitudinal sample length of the strip; The upper left corner and the lower left corner of the reverse side of the scale are respectively provided with scale lines at the positions 17.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip; the scale lines are at the positions 35.00 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 2 of the width of the strip; the scale lines are at the positions 52.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip. The upper left corner and the lower left corner of the reverse side of the scale are respectively provided with scale lines at the positions 17.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip; the scale lines are at the positions 35.00 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 2 of the width of the strip; the scale lines are at the positions 52.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip. The upper left corner and the lower left corner of the reverse side of the scale are respectively provided with scale lines at the positions 17.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip; the scale lines are at the positions 35.00 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 2 of the width of the strip; the scale lines are at the positions 52.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip. The upper left corner and the lower left corner of the reverse side of the scale are respectively provided with scale lines at the positions 17.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip; the scale lines are at the positions 35.00 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 2 of the width of the strip; the scale lines are at the positions 52.50 mm away from the left edge of the scale from left to right, and the width of the strip is 70.00 mm, and the scale lines are at the positions of 1 / 4 of the width of the strip.

[0012] The sampling scale is a square scale with a size of 100*100 mm, and the thickness is 1 mm.

[0013] The metal strip metallographic sampling method of the application is characterized in that the above-mentioned metal strip metallographic sampling scale is used, and the specific steps of using the front scale sampling and the reverse scale sampling are as follows: The transverse of the front side of the metal strip metallographic sampling scale is suitable for measuring metal strips with widths of 19.00 mm and 31.75 mm, and the longitudinal is suitable for measuring metal strips with widths of 12.70 mm, 25.40 mm, and 16.00 mm, and the metal strip metallographic sampling method comprises the following steps: Step 1) Measurement and marking According to the width of the metal strip to be tested, the rotating scale selects the corresponding transverse or longitudinal full-length strip width line on the front scale, places the scale on the metal strip to be tested, aligns the upper edge of the scale with the upper and lower edges of the metal strip respectively corresponding to the transverse or longitudinal full-length strip width line, and then marks the position of the scale line at the strip width 1 / 4 or the scale line at the strip width 1 / 2 along the longitudinal direction of the metal strip to be tested; finally, the corresponding marks on the metal strip are connected; Step 2) Cutting According to the connecting line, the metal strip sample is cut, the connecting line part of the mark at the strip width 1 / 4 is taken as the longitudinal sample, and it is cut into 5-6 pieces on average, and 4 pieces of transverse sample with a length of 15 mm are cut off; The reverse scale is transversely applicable to measuring metal strips with a width of 40.00 mm, 45.00 mm, and 60.00 mm, 65.00 mm, and longitudinally applicable to measuring metal strips with a width of 70.00 mm, 75.00 mm, and 50.00 mm, 55.00 mm, and the sampling method of the reverse scale is: Step 1) Measurement and marking According to the width of the metal strip to be tested, the rotating scale selects the corresponding transverse or longitudinal full-length strip width line on the front scale, places the scale on the metal strip to be tested, aligns the upper edge of the scale with the upper and lower edges of the metal strip respectively corresponding to the transverse or longitudinal full-length strip width line, and then marks the position of the scale line at the strip width 1 / 4 or the scale line at the strip width 1 / 2 along the longitudinal direction of the metal strip to be tested; finally, the corresponding marks on the metal strip are connected; Step 2) Cutting According to the connecting line of step 1), the metal strip sample is cut. The wave line part with a length of 50 mm is cut in half according to the scale line at the strip width 1 / 2 to form a longitudinal sample with a test surface length of 100 mm, which is evenly divided into 6 longitudinal samples; then a transverse sample with a length of 15 mm is cut off, which is cut into 4 transverse samples according to the connecting line.

[0014] Preferably, when the front scale is used to measure a metal strip with a width of 25.40 mm or 31.75 mm, Step 1) Measurement and marking According to the width of the metal strip to be tested, the rotating scale selects the corresponding transverse or longitudinal full-length strip width line on the front scale, places the scale on the metal strip to be tested, aligns the upper edge of the scale with the upper and lower edges of the metal strip respectively corresponding to the transverse or longitudinal full-length strip width line, and then marks the position of the scale line at the strip width 1 / 4 or the scale line at the strip width 1 / 2 along the longitudinal direction of the metal strip to be tested; finally, the corresponding marks on the metal strip are connected; Marking the scale lines at the positions corresponding to the 1 / 4 width and the 1 / 2 width of the strip on the left and right sides of the surface of the metal strip, and then connecting the corresponding marks, wherein the connecting line of the scale line at the 1 / 2 width is extended outward by 30 mm, and the extended part is the cutting position of the two transverse samples; Step 2) Cutting Cutting the metal strip sample according to the connecting line of step 1), and the connecting line part of the mark at the 1 / 4 width is a longitudinal sample, which is evenly cut into 5-6 pieces, and the two transverse samples are cut into 4 pieces of transverse samples according to the connecting line of the scale line at the 1 / 2 width.

[0015] 4. The metal strip metallographic sampling method according to claim 2, characterized in that, When measuring the metal strip of 12.70 mm or 16.00 mm or 19.00 mm by using the front scale, step 1) measures and marks According to the width of the metal strip to be tested, rotating the scale to select the corresponding full-length strip width line of 12.70 mm or 16.00 mm or 19.00 mm on the front scale, and placing the scale on the strip so that the edge of the scale, the full-length strip width line of 12.70 mm or 16.00 mm or 19.00 mm, and the upper and lower edges of the strip are aligned respectively; marking the positions of the scale lines at the 1 / 4 width of the strip on the left and right sides of the surface of the metal strip, and then connecting the corresponding marks. Step 2) Cutting Cutting the metal strip sample according to the connecting line of step 1), and the connecting line part of the mark at the 1 / 4 width is a longitudinal sample, which is evenly cut into 5-6 pieces, and the two transverse samples are cut into 4 pieces of transverse samples according to the connecting line of the scale line at the 1 / 2 width.

[0016] The advantages of the present application are: The metal strip metallographic sampling scale and the sampling method of the present application not only meet the requirements of the national standard for the sampling length and the testing position of the metal strip, but also are simple and easy to operate, time-saving and labor-saving, and improve the work efficiency of the metallographic testing, and greatly avoid the mistakes caused by human operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the metal strip sampling scale.

[0018] Figure 2 It is a back view of the metal strip sampling scale.

[0019] Figure 3 It is a sampling connecting line diagram of the metal strip with a width of 31.75 mm steel strip.

[0020] Figure 4 It is a sampling connecting line diagram of the metal strip with a width of 12.70 mm steel strip.

[0021] Figure 5 The sampling connection diagram is for a steel strip with a metal strip width of 50.00 mm. DETAILED DESCRIPTION

[0022] The application will be described below in conjunction with the drawings.

[0023] It should be noted that in the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the relative or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] As shown in Figure 1 and Figure 2 , a metal strip metallographic sampling scale is characterized in that it comprises a square stainless steel scale, a plurality of strip width lines are arranged on the front and back of the scale in the transverse and longitudinal directions, and strip width proportional scale lines are arranged on the upper, lower, left and right corners of the square stainless steel scale. On the front of the scale, a transverse strip width line A1 is arranged from top to bottom at a position 31.75 mm away from the upper edge of the scale; on the front of the scale, a transverse strip width line A2 is arranged from bottom to top at a position 19.00 mm away from the lower edge of the scale. On the front of the scale, a longitudinal strip width line B1 is arranged from left to right at a position 16.00 mm away from the left edge of the scale; between the right edge of the scale and the longitudinal strip width line B1, a longitudinal strip width line B2 is arranged from right to left at a position 25.40 mm away from the right edge of the scale; between the right edge of the scale and the strip width line B2 of 25.40 mm, a longitudinal strip width line B3 is arranged from right to left at a position 12.70 mm away from the right edge of the scale. On the upper left and right corners of the front of the scale, respectively from top to bottom, a scale line is arranged at a position 7.94 mm away from the upper edge of the scale in the transverse direction, which is 1 / 4 of the width of the strip with a width of 31.75 mm; from top to bottom, a scale line is arranged at a position 15.88 mm away from the upper edge of the scale in the transverse direction, which is 1 / 2 of the width of the strip with a width of 31.75 mm; from top to bottom, a scale line is arranged at a position 23.82 mm away from the upper edge of the scale in the transverse direction, which is 1 / 4 of the width of the strip with a width of 31.75 mm. The upper left corner and the lower left corner of the front side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 16.00 mm wide strip at a position 4.00 mm away from the left edge of the scale from left to right. The upper right corner and the lower right corner of the front side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 12.70 mm wide strip at a position 3.18 mm away from the right edge of the scale from right to left. The upper right and lower right edges of the front side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 25.40 mm wide strip at a position 6.35 mm and 19.05 mm away from the right edge of the scale from right to left. The lower left corner and the lower right corner of the front side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 19.00 mm wide strip at a position 4.75 mm away from the lower edge of the scale from bottom to top.

[0025] The back side of the scale is provided with a full-length transverse strip width line A3 and A4 at a position 40.00 mm and 45.00 mm away from the upper edge of the scale from top to bottom; and a full-length transverse strip width line A5 and A6 at a position 60.00 mm and 65.00 mm away from the lower edge of the scale from bottom to top. The back side of the scale is provided with a full-length longitudinal strip width line B4 and B5 at a position 70.00 mm and 75.00 mm away from the left edge of the scale from left to right; and a full-length longitudinal strip width line B6 and B7 at a position 50.00 mm and 55.00 mm away from the right edge of the scale from right to left. The upper left corner and the upper right corner of the back side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 40.00 mm wide strip at a position 10.00 mm away from the upper edge of the scale from top to bottom; a scale line of 1 / 2 of the width of a 40.00 mm wide strip at a position 20.00 mm away from the upper edge of the scale from top to bottom; and a scale line of 1 / 4 of the width of a 40.00 mm wide strip at a position 30.00 mm away from the upper edge of the scale from top to bottom. The upper left and upper right edges of the back side of the scale are respectively provided with a scale line of 1 / 4 of the width of a 45.00 mm wide strip at a position 11.25 mm away from the upper edge of the scale from top to bottom; a scale line of 1 / 2 of the width of a 45.00 mm wide strip at a position 22.50 mm away from the upper edge of the scale from top to bottom; and a scale line of 1 / 4 of the width of a 45.00 mm wide strip at a position 33.75 mm away from the upper edge of the scale from top to bottom. The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The left lower corner and the right lower corner of the reverse side of the scale are respectively provided with scale lines at the positions 15.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; 30.00 mm from the lower edge of the scale, 1 / 2 of the width of the 60.00 mm wide strip in the transverse direction; 45.00 mm from the lower edge of the scale, 1 / 4 of the width of the 60.00 mm wide strip in the transverse direction; The right upper and lower edges of the reverse side of the scale are respectively provided with scale lines of the width 1 / 4 of the 55.00mm wide strip from the right to the left at a position 13.75mm away from the right edge of the scale, scale lines of the width 1 / 2 of the 55.00mm wide strip from the right to the left at a position 27.50mm away from the right edge of the scale, and scale lines of the width 1 / 4 of the 55.00mm wide strip from the right to the left at a position 41.25mm away from the right edge of the scale.

[0026] According to the metal strip related metallographic detection standard requirements and the summary of production practice, the sampling principle is: the longitudinal sample with a length of 100mm and a test surface of 1 / 4 of the width of the steel strip and the transverse sample with a length of more than 20mm and a test surface of at least 1 / 2 of the width of the steel strip to the edge; the sample height of not more than 20mm can simultaneously hot embed two samples.

[0027] The longitudinal sample has a length of 100mm, which not only meets the national sampling quantity requirements but also leaves a proper embedding space for the transverse sample. The scale line at the width 1 / 4 position indicates that the longitudinal sample detection surface position is at the width 1 / 4 of the steel strip. Because the cavity height of the hot embedding machine is limited, the shortest scale line at the width 1 / 4 position is arranged on the upper and lower edges of the steel strip with a width of more than 25.40mm, and the upper and lower edges are cut to the width 1 / 4 position, so that the sample height is shortened, two samples can be simultaneously hot embedded, and the non-width 1 / 4 position as the detection surface can be avoided.

[0028] The metal strip metallographic sampling scale is shown in the accompanying drawings. Figures 3-5 The specific sampling method is as follows: The front surface of the metal strip metallographic sampling scale of the application is transversely applicable to measuring the metal strip with a width of 19.00mm and 31.75mm, and longitudinally applicable to measuring the metal strip with a width of 12.70mm, 25.40mm and 16.00mm.

[0029] When the 25.40mm or 31.75mm metal strip is measured by using the front surface scale, Step 1) Measurement and marking According to the width of the metal strip to be detected, the corresponding length strip width line 25.40mm or 31.75mm on the front surface scale is selected, the scale is placed on the strip, and the scale edge, the length strip width line 25.40mm or 31.75mm and the upper and lower edges of the strip are respectively aligned. Mark the positions of the scale lines at 1 / 4 and 1 / 2 of the width of the strip on the left and right sides of the scale on the surface of the metal strip, then connect the corresponding marks, and the line connecting the scale line at 1 / 2 of the width of the strip should be extended outward by 30 mm, and the extended part is the position of the two transverse samples; Step 2) Cutting Cut the metal strip sample according to the line in step 1), the line connecting the marks at 1 / 4 of the width is the longitudinal sample, first cut the longitudinal sample into 5-6 pieces, then cut off the upper and lower edges of the line connecting the marks at 1 / 4 of the width of the metal strip sample to form a longitudinal sample with a test surface length of 100 mm, and finally cut the two transverse samples into four pieces according to the line connecting the scale lines at 1 / 2 of the width.

[0030] (Move to page 22, not sure if it's appropriate.) Example: The most common width of metal strip on the market is 31.75 mm, and the sampling method is as follows: Step 1) Select the 31.75 mm long scale line of the scale, align the scale line with the edge of the steel strip, mark the positions of 7.94, 15.88, and 23.82 on both sides of the scale, and move the scale down to connect the lines, where the 15.88 scale line is extended outward by 30 mm, and the extended part is the position of the two transverse samples; Cut according to step 2 above, as shown in Figure 3 .

[0031] As shown in Figure 5 , when measuring 12.70 mm or 16.00 mm or 19.00 mm metal strip with the front scale, step 1) measures and marks According to the width of the metal strip being tested, rotate the scale to select the corresponding full-length strip width line 12.70 mm or 16.00 mm or 19.00 mm on the front scale, place the scale on the strip so that the edge of the scale, the full-length strip width line 12.70 mm or 16.00 mm or 19.00 mm, and the upper and lower edges of the strip are aligned respectively; mark the positions of the scale lines at 1 / 4 of the width of the metal strip on the left and right sides of the scale on the surface of the metal strip, then connect the corresponding marks; Step 2) Cutting Cut the metal strip sample according to the line in step 1), the line connecting the marks at 1 / 4 of the width is the longitudinal sample, first cut the longitudinal sample into 5-6 pieces, then cut off the upper and lower edges of the line connecting the marks at 1 / 4 of the width of the metal strip sample to form a longitudinal sample with a test surface length of 100 mm, and finally cut the two transverse samples into four pieces according to the line connecting the scale lines at 1 / 2 of the width.

[0032] The steel strip sample with width less than 19.00mm only needs to be cut to 1 / 4 full thickness position, and two metallographic samples can be embedded at the same time, and the other side is smooth blue edge, which is easy to identify 1 / 4 position test surface.

[0033] As shown in Figure 2 The scale line of the shorter scale line of the reverse scale represents the transverse sample detection surface position at 1 / 2 of the width of the steel strip, such as 20.00, which represents the distance from the end point of the scale to the short scale line, which is the transverse sample detection surface position at 1 / 2 of the width of the steel strip with a width of 40.00mm; The shortest scale line of the reverse scale represents the longitudinal sample detection surface position at 1 / 4 of the width of the steel strip. For example, 10.00 and 30.00 represent the distance from the end point of the scale to the short scale line, which is the longitudinal sample detection surface position at 1 / 4 of the width of the upper and lower edges of the steel strip with a width of 40.00mm.

[0034] The values at the four corner positions of the reverse scale represent: 10.00 represents the distance from the end point of the scale to the short scale line, which is the longitudinal sample detection surface position at 1 / 4 of the width of the steel strip with a width of 40.00mm; 12.50 represents the distance from the end point of the scale to the short scale line, which is the longitudinal sample detection surface position at 1 / 4 of the width of the steel strip with a width of 50.00mm; 15.00 represents the distance from the end point of the scale to the short scale line, which is the longitudinal sample detection surface position at 1 / 4 of the width of the steel strip with a width of 60.00mm; 17.50 represents the distance from the end point of the scale to the short scale line, which is the longitudinal sample detection surface position at 1 / 4 of the width of the steel strip with a width of 70.00mm; The sampling method of the reverse scale: Step 1) Measurement and marking According to the width of the metal strip to be tested, rotate the reverse scale to select the corresponding transverse or longitudinal strip width line on the scale, place the scale on the strip so that the upper edge of the scale and the corresponding transverse or longitudinal strip width line are aligned with the upper and lower edges of the strip, respectively, then mark the positions of the 1 / 4 width scale line and the 1 / 2 width scale line along the longitudinal direction of the strip, connect the corresponding marks on the strip, and mark the position of the sample length of 50mm, draw a wavy line mark on the 1 / 4 width scale line to the position of 50mm length; Step 2) Cutting According to the connecting line of step 1), the metal strip sample is cut, the wavy line part with a length of 50mm is cut in half according to the scale line at the width of 1 / 2, forming a longitudinal sample with a test surface length of 100mm, which is evenly divided into 6 longitudinal samples; then a transverse sample with a length of 15mm is cut, which is cut into 4 transverse samples according to the connecting line.

[0035] For example: the width of the metal strip is 50.00mm, the sampling method is as follows: Step 1) Select the reverse scale 50.00mm long scale line, place the scale on the steel strip, align the scale line with the edge of the steel strip, mark the positions of 12.50, 25.00 and 37.50 on both sides of the scale, and mark the position of 50.00mm length on the connecting line while moving the scale connecting line. Draw a wavy line at the width of 1 / 4 of the longitudinal sample test surface edge and mark it to the position of 50.00mm length, and the 50.00mm wavy line part is the cutting length of the longitudinal sample.

[0036] Step 2) According to the connecting line, cut the wavy line part with a length of 50.00mm according to the scale line at the width of 1 / 2, form a longitudinal sample with a length of 10.00mm, the side marked by the wavy line is the longitudinal sample test surface, and cut a transverse sample with a length of about 15mm from the remaining part, cut it into 4 transverse samples according to the connecting line. As shown in Figure 4 .

[0037] The above cutting method can meet the requirements of the number of longitudinal samples in the national standard on the one hand, and on the other hand, two steel strip samples with larger width can be simultaneously subjected to hot inlaying; the operation is simple, time-saving and labor-saving, the work efficiency of metallographic detection is improved, and the operation errors are greatly avoided.

Claims

1. A metal strip metallographic sampling scale, characterized in that: A square stainless steel ruler is provided with a plurality of strip width lines in the horizontal and vertical directions on the front and back of the ruler, and strip width proportional scale lines are provided at the top, bottom, left and right corners of the square stainless steel ruler; On the front of the ruler, a continuous transverse strip width line A1 is set at a position 31.75 mm from the upper edge of the ruler from top to bottom; on the front of the ruler, a continuous transverse strip width line A2 is set at a position 19.00 mm from the lower edge of the ruler from bottom to top; On the front side of the ruler, a longitudinal strip width line B1 is provided at a position 16.00 mm away from the left edge of the ruler from left to right; a longitudinal strip width line B2 is provided between the right edge of the ruler and the longitudinal strip width line B1 and at a position 25.40 mm away from the right edge of the ruler from right to left; and a longitudinal strip width line B3 is provided between the right edge of the ruler and the 25.40 mm strip width line B2 and at a position 12.70 mm away from the right edge of the ruler from right to left. At the upper left and upper right corners of the front of the ruler, respectively, at a position 7.94 mm from the top to the bottom of the upper edge of the ruler, a scale mark is set at 1 / 4 of the width of the strip with a width of 31.75 mm; at a position 15.88 mm from the top to the bottom of the upper edge of the ruler, a scale mark is set at 1 / 2 of the width of the strip with a width of 31.75 mm; and at a position 23.82 mm from the top to the bottom of the upper edge of the ruler, a scale mark is set at 1 / 4 of the width of the strip with a width of 31.75 mm. At the upper left corner and the lower left corner of the front of the ruler, respectively, at a position 4.00 mm away from the left edge of the ruler from left to right, a scale line at 1 / 4 of the width of the 16.00 mm strip is set longitudinally; At the upper right corner and the lower right corner of the front scale, respectively, at a distance of 3.18 mm from the right edge of the scale from right to left, a scale line is set longitudinally at 1 / 4 of the width of the 12.70 mm strip; The upper and lower edges of the right side of the front of the ruler are respectively 6.35 mm and 19.05 mm away from the right edge of the ruler from right to left, and a scale line is set longitudinally at 1 / 4 of the width of the 25.40 mm strip; At the lower left and right corners of the front of the ruler, a scale line is set horizontally at a position 4.75 mm away from the lower edge of the ruler from bottom to top, which is 1 / 4 of the width of the 19.00 mm strip; On the reverse side of the scale, transverse strip width lines A3 and A4 are provided at positions 40.00 mm and 45.00 mm apart from the upper edge of the scale from top to bottom; and transverse strip width lines A5 and A6 are provided at positions 60.00 mm and 65.00 mm apart from the lower edge of the scale from bottom to top. On the reverse side of the ruler, longitudinal strip width lines B4 and B5 are provided at positions 70.00 mm and 75.00 mm from the left edge of the ruler; longitudinal strip width lines B6 and B7 are provided at positions 50.00 mm and 55.00 mm from the right edge of the ruler; At the upper left corner and the upper right corner of the reverse side of the ruler, respectively, at a position 10.00 mm away from the upper edge of the ruler from top to bottom, a scale mark is set at 1 / 4 of the width of the strip with a width of 40.00 mm; at a position 20.00 mm away from the upper edge of the ruler from top to bottom, a scale mark is set at 1 / 2 of the width of the strip with a width of 40.00 mm; and at a position 30.00 mm away from the upper edge of the ruler from top to bottom, a scale mark is set at 1 / 4 of the width of the strip with a width of 40.00 mm; On the upper left and right edges of the reverse side of the ruler, respectively, at a position 11.25 mm from the upper edge of the ruler, a scale mark is set horizontally at 1 / 4 of the width of a strip with a width of 45.00 mm; at a position 22.50 mm from the upper edge of the ruler, a scale mark is set horizontally at 1 / 2 of the width of a strip with a width of 45.00 mm; and at a position 33.75 mm from the upper edge of the ruler, a scale mark is set horizontally at 1 / 4 of the width of a strip with a width of 45.00 mm. At the lower left and lower right corners of the reverse side of the ruler, respectively, at a position 15.00 mm from the bottom to the top, a scale mark is set at 1 / 4 of the width of a 60.00 mm strip; at a position 30.00 mm from the bottom to the top, a scale mark is set at 1 / 2 of the width of a 60.00 mm strip; and at a position 45.00 mm from the bottom to the top, a scale mark is set at 1 / 4 of the width of a 60.00 mm strip. On the left and right lower edges of the reverse side of the ruler, at a position 16.25 mm from the bottom to the top and a distance from the lower edge of the ruler, a scale mark is set horizontally at 1 / 4 of the width of the strip with a width of 65.00 mm; at a position 32.50 mm from the bottom to the top and a distance from the lower edge of the ruler, a scale mark is set horizontally at 1 / 2 of the width of the strip with a width of 65.00 mm; and at a position 48.75 mm from the bottom to the top and a distance from the lower edge of the ruler, a scale mark is set horizontally at 1 / 4 of the width of the strip with a width of 65.00 mm. A horizontal scale line of 50.00 mm is provided on the reverse side of the scale at a position 50.00 mm from bottom to top and from the lower edge of the scale, so as to facilitate measurement of the longitudinal length of the strip sample; At the upper left corner and the lower left corner of the reverse side of the ruler, respectively, at a position 17.50 mm away from the left edge of the ruler, a scale mark is set longitudinally at 1 / 4 of the width of the strip with a width of 70.00 mm; at a position 35.00 mm away from the left edge of the ruler, a scale mark is set longitudinally at 1 / 2 of the width of the strip with a width of 70.00 mm; and at a position 52.50 mm away from the left edge of the ruler, a scale mark is set longitudinally at 1 / 4 of the width of the strip with a width of 70.00 mm; On the left upper and lower edges of the reverse side of the ruler, respectively, at a position 18.75 mm from the left edge of the ruler, a scale mark is set longitudinally at 1 / 4 of the width of a strip with a width of 75.00 mm; at a position 37.50 mm from the left edge of the ruler, a scale mark is set longitudinally at 1 / 2 of the width of a strip with a width of 75.00 mm; and at a position 56.25 mm from the left edge of the ruler, a scale mark is set longitudinally at 1 / 4 of the width of a strip with a width of 75.00 mm; At the upper right corner and the lower right corner of the reverse side of the ruler, respectively, at a distance of 12.50 mm from the right edge of the ruler from right to left, there are longitudinal scale marks at 1 / 4 of the width of a 50.00 mm strip; the longitudinal strip width line B5 is a scale mark at 1 / 2 of the width of a 50.00 mm strip; at a distance of 37.50 mm from the right edge of the ruler from right to left, there is a scale mark at 1 / 4 of the width of a 50.00 mm strip; On the upper and lower edges of the right side of the reverse side of the ruler, at a distance of 13.75 mm from the right edge of the ruler from right to left, a scale line is longitudinally set at 1 / 4 of the width of the strip with a width of 55.00 mm; at a distance of 27.50 mm from the right edge of the ruler from right to left, a scale line is longitudinally set at 1 / 2 of the width of the strip with a width of 55.00 mm; and at a distance of 41.25 mm from the right edge of the ruler from right to left, a scale line is longitudinally set at 1 / 4 of the width of the strip with a width of 55.00 mm.

2. A metal strip metallographic sampling scale, characterized in that: The sampling ruler is a square ruler of 100×100 mm and has a thickness of 1 mm.

3. A metal strip metallographic sampling method, characterized in that: Using any one of the metal strip metallographic sampling scales of claims 1-3, including using a front scale and a back scale for sampling, the specific steps are as follows: The front side of the strip metallographic sampling scale is suitable for measuring metal strips with widths of 19.00 mm and 31.75 mm in the horizontal direction, and suitable for measuring metal strips with widths of 12.70 mm, 25.40 mm, and 16.00 mm in the vertical direction. The metal strip metallographic sampling method includes the following steps: Step 1) Measure and mark According to the width of the metal strip being inspected, rotate the ruler to select the corresponding horizontal or vertical strip width line on the front scale. Place the ruler on the metal strip being inspected so that the upper edge of the ruler and the corresponding horizontal or vertical strip width line are aligned with the upper and lower edges of the metal strip respectively. Then, mark the scale line at 1 / 4 of the strip width or the scale line at 1 / 2 of the strip width along the longitudinal direction of the metal strip being inspected. Finally, connect the corresponding marks on the metal strip. Step 2) Cropping Cut the metal strip sample according to the connecting line. The connecting line marked at 1 / 4 of the width is used as the longitudinal sample. First, cut the longitudinal sample into 5-6 pieces evenly. Then cut off the upper and lower edges of the connecting line marked at 1 / 4 of the width of the metal strip sample to form a longitudinal sample with a test surface length of 100mm. Finally, cut 4 transverse samples with a length of 15mm. The reverse scale is suitable for measuring metal strips with widths of 40.00mm, 45.00mm, 60.00mm and 65.00mm in the horizontal direction, and for measuring metal strips with widths of 70.00mm, 75.00mm, 50.00mm and 55.00mm in the vertical direction. The sampling method for the reverse scale is as follows: Step 1) Measure and mark According to the width of the metal strip being inspected, rotate the ruler to select the corresponding horizontal or vertical strip width line on the reverse side of the ruler. Place the ruler on the strip so that the upper edge of the ruler and the corresponding horizontal or vertical strip width line are aligned with the upper and lower edges of the strip respectively. Then, mark the position of the scale line at 1 / 4 of the strip width or the scale line at 1 / 2 of the strip width along the longitudinal direction of the strip. Connect the corresponding marks on the strip and mark the position of 50mm of the sample length. Draw a wavy line mark on the scale line at 1 / 4 of the strip width to the 50mm length position. Step 2) Cropping Cut the metal strip specimens along the lines drawn in step 1). Cut the 50mm wavy section in half along the half-width scale line to form a longitudinal specimen with a test surface length of 100mm. Divide this into six equal longitudinal specimens. Then, cut a 15mm transverse specimen and cut it into four transverse specimens along the lines drawn in step 1).

4. The metal strip metallographic sampling method according to claim 3, characterized in that: When using the front scale to measure 25.40mm or 31.75mm metal strips, Step 1) Measure and mark Rotate the ruler according to the width of the metal strip being inspected. Select the corresponding full-length strip width line 25.40mm or 31.75mm on the front scale. Place the ruler on the strip so that the edge of the ruler and the full-length strip width line 25.40mm or 31.75mm are aligned with the upper and lower edges of the strip respectively. Mark the positions of the scale lines at 1 / 4 and 1 / 2 of the width of the strip on the left and right sides of the ruler, and then connect the corresponding marks. The line connecting the scale lines at 1 / 2 of the width needs to be extended outward by 30mm. The extended position is the cutting position of the two transverse specimens. Step 2) Cropping Cut the metal strip specimens according to the connecting lines in step 1). The connecting line marked at 1 / 4 of the width is the longitudinal specimen, which should be cut into 5-6 pieces on average. Cut the two transverse specimens in half along the line connecting the scale lines at 1 / 2 of the width into 4 transverse specimens.

5. The metal strip metallographic sampling method according to claim 4, characterized in that: When using the front scale to measure a metal strip of 12.70mm, 16.00mm or 19.00mm, step 1) measurement and marking Rotate the ruler according to the width of the metal strip being inspected. Select the corresponding full-length strip width line 12.70mm, 16.00mm, or 19.00mm on the front scale. Place the ruler on the strip, aligning the ruler edge, the full-length strip width line 12.70mm, 16.00mm, or 19.00mm with the upper and lower edges of the strip, respectively. Mark the corresponding scale lines at 1 / 4 of the strip width on the left and right sides of the ruler, and then connect the corresponding marks. Step 2) Cropping Cut the metal strip specimens according to the connecting line in step 1). The connecting line marked at 1 / 4 of the width is the longitudinal specimen. Cut it into 5-6 pieces on average, and then cut 4 transverse specimens with a length of 15 mm.

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