Aging impact test sample processing device and method

Abstract

The invention relates to the technical field of steel performance testing, in particular to an aging impact test sample machining device and method.The device comprises a cuboid-shaped clamping piece, the clamping piece is provided with a sample bin transversely penetrating through the interior of the clamping piece, the width of the sample bin is 12 mm, and at least two saw gaps are formed in the upper end face of the clamping piece downwards in the height direction; the depth of the saw kerfs is smaller than the height of the clamping piece, the bottom ends of the saw kerfs are located below the sample bin, the saw kerfs divide the clamping piece into a plurality of sub-clamping pieces, the upper end face of each sub-clamping piece is provided with a screwed fastening bolt, and the bottom ends of the fastening bolts are located in the sample bin. According to the invention, the processing efficiency of the aging impact sample can be obviously improved, the size of the sample in the length direction can be prevented from exceeding allowance, and the processing precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel performance testing, and in particular to a device and method for processing a specimen for an aging impact test. Background Art

[0002] The aging impact test is a test method used to determine the change in the impact absorbed energy of a metal material after a specific strain and subsequent artificial aging treatment. It is a process in which the sample is first deformed a certain amount, kept at a certain temperature for a certain period of time (simulating the service condition of the component), and then processed into a standard impact sample after aging treatment, and then subjected to an impact test. This test method is mainly used to evaluate the strain aging sensitivity of steel, that is, after the material is plastically deformed, the diffusion and aggregation of solute atoms (such as C, N, B, etc.) causes the dislocation movement to be hindered, thereby affecting the toughness and plasticity of the material. This test is of great significance for ensuring the performance stability of the material in actual use, especially under low temperature or dynamic load conditions.

[0003] At present, the processing method of aging impact standard specimens is to take a long strip specimen from the designated position of the slab for strain stretching and aging treatment according to GB / T 4160, GB / T 229 or the agreement, and then use a sawing machine to saw the specimens into impact specimen blanks one by one, and then perform post-processing milling and notch processing to obtain impact specimens that meet relevant standards. The disadvantage of this processing method is that the process of sawing into impact specimen blanks requires sawing processing one by one, which has low processing efficiency; and the length direction accuracy may exceed the tolerance due to the offset of the saw blade during the sawing process. Summary of the invention

[0004] In view of the technical problems of low efficiency and poor precision in specimen processing and sawing, the present invention provides a device and method for processing aging impact test specimens, which can significantly improve the processing efficiency of aging impact specimens, avoid the dimension of the specimen in the length direction from exceeding the tolerance, and improve the processing precision.

[0005] In the first aspect, the present invention provides an aging impact test specimen processing device, including a clamping piece in the shape of a rectangular parallelepiped, the clamping piece is provided with a specimen chamber which runs transversely through the interior thereof, the width of the specimen chamber is 12 mm, at least two saw slits are opened downwardly along the height direction on the upper end surface of the clamping piece, the depth of the saw slits is less than the height of the clamping piece and the bottom end of the saw slits is located below the specimen chamber, the saw slits divide the clamping piece into a plurality of sub-clamping pieces, each sub-clamping piece is provided with a screwed-in fastening bolt on the upper end surface thereof, and the bottom end of the fastening bolt is located in the specimen chamber.

[0006] Furthermore, the lengths of the sub-clamps are equal, 55 mm, and the width of the sample bin is 12 mm. The sample bin of this size has a binding effect on the sample blank after aging treatment in the width direction.

[0007] Furthermore, the width of the saw kerf matches the thickness of the saw blade, which is 1mm larger than the thickness of the saw blade, and varies slightly according to the type and material of the saw blade. The saw kerf of this width can ensure the smooth operation of the saw blade and also restrain the saw blade to avoid the size exceeding the tolerance due to the deviation of the saw blade during the sawing process.

[0008] In a second aspect, the present invention provides a method for processing a specimen for an aging impact test, comprising: (1) The sample is subjected to strain and aging treatment, and the strain is tensile strain; (2) The processed groups of samples are stacked in sequence and sent into the sample bin along the length direction; (3) Rotate the fastening bolt so that the bottom end of the fastening bolt moves downward and presses against the surface of the sample to fix the sample; (4) Use a saw blade to saw downward along the saw seam until multiple groups of sample blanks are sawed off; (5) Rotate the fastening bolt in the opposite direction to separate the bottom end of the fastening bolt from the sample. Remove the sawn sample and obtain the standard specimen after post-processing.

[0009] Furthermore, in step (1), the thicknesses of the multiple groups of samples are the same or different.

[0010] Furthermore, in step (1), the widths of the samples after sampling are equal.

[0011] Furthermore, in step (1), when sampling the sample, at least one rolled surface is retained.

[0012] Furthermore, in step (1), when the thickness of the motherboard is ≥12 mm, the thickness of the sample after sampling is 12 mm; when the thickness of the motherboard is less than 12 mm, the thickness of the sample after sampling is the thickness of the motherboard.

[0013] Furthermore, in step (4), when the end of the sample is exposed by sawing the side of the clamp, the saw blade needs to be adjusted to be close to the side of the clamp to saw off the sample.

[0014] The beneficial effects of the present invention are: (1) The method and device for processing aging impact specimens provided by the present invention can realize batch sawing of specimens through the use of a specimen chamber and fastening bolts, thereby improving the efficiency of specimen processing.

[0015] (2) The processing method and device of the aging impact specimen provided by the present invention stack the specimens in sequence and send them into the specimen bin along the length direction. The specimen bin has a restraining effect on the specimen in the width direction. The specimen is then fixed by fastening bolts and the saw blade is restrained by the saw seam, ensuring that the specimen will not move in the specimen bin during the sawing process and the saw blade will not deviate, thereby ensuring the accuracy of specimen processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the processing device in Example 1 of the specific implementation mode of the present invention.

[0018] Figure 2 yes Figure 1 Side view.

[0019] Figure 3 yes Figure 1 Main view.

[0020] Figure 4 It is a sample loading diagram of a specific implementation mode of the present invention.

[0021] Figure 5 It is a schematic diagram of sawing a sample according to a specific embodiment of the present invention.

[0022] In the figure, 1-clamping part, 2-saw seam, 3-sub-clamping part, 4-fastening bolt, 5-sample chamber, 6-sample blank, 7-saw blade. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] Example 1 like Figure 1 The present invention provides a processing device for an aging impact test specimen, comprising a clamping member 1 in the shape of a rectangular parallelepiped, the clamping member 1 being provided with a specimen chamber 5 which runs transversely through the interior thereof, at least two saw slits 2 being provided downwardly along the height direction on the upper end surface of the clamping member 1, the width of the saw slit 2 being greater than the thickness of a saw blade 7 by 1 mm, the width of the saw slit 2 being matched with the thickness of the saw blade, the saw slit 2 of this width having a binding effect on the saw blade to avoid the dimension exceeding the tolerance due to the deviation of the saw blade during the sawing process, the depth of the saw slit 2 being less than the height of the clamping member 1 and the bottom end of the saw slit 2 being located below the specimen chamber 5, the saw slit 2 dividing the clamping member 1 into a plurality of sub-clamping members 3, the upper end surface of each sub-clamping member 3 being provided with a screwed-in fastening bolt 4, the bottom end of the fastening bolt 4 being located in the specimen chamber 5.

[0025] Combination Figure 2 , the width a of the sample chamber 5 of the present invention is 12 mm.

[0026] Combination Figure 3 , the lengths b, c, and d of each sub-clamping member 3 of the present invention are equal, b=c=d=55mm.

[0027] Example 2 Combination Figure 4 , Figure 5 The present invention provides a method for processing an aging impact test specimen, wherein the processing device in Example 1 is used to process the specimen, and a group of steel materials having a slab mother plate thickness of 18 mm, 18 mm, 12 mm, 10 mm, and 8 mm in Example 2 are used to process the aging impact specimen, and the strain type is tensile strain. The processing method comprises: (1) Samples are taken from the mother plate according to the relevant product standards. The sample 6 is a tensile sample, including: the sample is taken from the steel mother plate with a thickness of 18 mm. The size of the tensile sample is 12 mm (thickness) × 12 mm (width) × L (length), and one rolling surface is retained. The sample is taken from the steel mother plate with a thickness of 12 mm. The size of the tensile sample is 12 mm (thickness) × 12 mm (width) × L (length), and two rolling surfaces are retained. The sample is taken from the steel mother plate with a thickness of 10 mm. The size of the tensile sample is 10 mm (thickness) × 12 mm (width) × L (length), and two rolling surfaces are retained. The sample is taken from the steel mother plate with a thickness of 8 mm. The size of the tensile sample is 8 mm (thickness) × 12 mm (width) × L (length), and two rolling surfaces are retained. The width of all tensile samples is 12 mm, and L is the length of the tensile sample.

[0028] (2) Subject the tensile specimen to the specified tensile strain and aging treatment.

[0029] (3) The processed groups of sample blanks 6 are stacked in sequence and sent into the sample bin along the length direction, with both ends of the sample blanks 6 protruding from the sample bin.

[0030] (4) Rotate the fastening bolt so that the bottom end of the fastening bolt moves downward and rests against the surface of the sample 6 to be fixed.

[0031] (5) Clamp the clamp on the sawing machine fixture, operate the sawing machine, first adjust the saw blade to be close to the left end face of the clamping member, and saw along the end face direction to saw off the exposed part on the left side; then adjust the saw blade to be close to the right end face of the clamping member, and saw along the end face direction to saw off the exposed part on the right side; then operate the sawing machine so that the saw blade saws along the sawing seam until multiple groups of sample blanks 6 are sawn off.

[0032] (6) Remove the clamp from the sawing machine, loosen the fastening bolts, remove the sawn specimen, and use a milling machine, grinder, or slotting machine to process the specimen into a standard specimen specified in GB / T229.

[0033] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A device for processing specimens for an aging impact test, characterized in that: The invention comprises a clamping piece in the shape of a rectangular parallelepiped, wherein the clamping piece is provided with a sample chamber which runs transversely through the inside thereof, the width of the sample chamber is 12 mm, at least two saw slits are opened downwardly along the height direction on the upper end surface of the clamping piece, the depth of the saw slits is less than the height of the clamping piece and the bottom end of the saw slits is located below the sample chamber, the saw slits divide the clamping piece into a plurality of sub-clamping pieces, the upper end surface of each sub-clamping piece is provided with a screwed-in fastening bolt, and the bottom end of the fastening bolt is located in the sample chamber.

2. The aging impact test specimen processing device according to claim 1, characterized in that: The lengths of the sub-clamps are equal, and are all 55 mm.

3. The aging impact test specimen processing device according to claim 1, characterized in that: The width of the sample chamber is 12 mm.

4. The aging impact test specimen processing device according to claim 1, characterized in that: The width of the saw kerf matches the thickness of the saw blade, and the width of the saw kerf is 1mm larger than the thickness of the saw blade.

5. A method for processing samples for aging impact test, characterized in that: The sample is processed by the aging impact test sample processing device according to claim 1, and the processing method includes: (1) The sample is subjected to strain and aging treatment, and the strain is tensile strain; (2) The processed groups of samples are stacked in sequence and sent into the sample bin along the length direction; (3) Rotate the fastening bolt so that the bottom end of the fastening bolt moves downward and presses against the surface of the sample to fix the sample; (4) Use a saw blade to saw downward along the saw seam until multiple groups of sample blanks are sawed off; (5) Rotate the fastening bolt in the opposite direction to separate the bottom end of the fastening bolt from the sample. Remove the sawn sample and obtain the standard specimen through post-processing.

6. The method for processing a specimen for an aging impact test according to claim 5, characterized in that: In step (1), the thicknesses of the plurality of groups of samples are the same or different.

7. The method for processing a specimen for an aging impact test according to claim 5, characterized in that: In step (1), the widths of the samples after sampling are equal.

8. The method for processing a specimen for an aging impact test according to claim 5, characterized in that: In step (1), when sampling the sample, at least one rolled surface is retained.

9. The method for processing a specimen for an aging impact test according to claim 5, characterized in that: In step (1), when the thickness of the motherboard is ≥12 mm, the thickness of the sample after sampling is 12 mm; when the thickness of the motherboard is less than 12 mm, the thickness of the sample after sampling is the thickness of the motherboard.

10. The method for processing a specimen for an aging impact test according to claim 5, characterized in that: In step (4), when the end of the sample is exposed by sawing the side of the clamp, the saw blade needs to be adjusted to be close to the side of the clamp to saw off the sample.

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