CN113092301A - On-spot with experimental calibration test block of richter hardness - Google Patents
On-spot with experimental calibration test block of richter hardness Download PDFInfo
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- CN113092301A CN113092301A CN202110462332.1A CN202110462332A CN113092301A CN 113092301 A CN113092301 A CN 113092301A CN 202110462332 A CN202110462332 A CN 202110462332A CN 113092301 A CN113092301 A CN 113092301A
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Abstract
The invention discloses a field calibration test block for a Leeb hardness test, and belongs to the technical field of test and detection. Comprises a foundation block and a plurality of single test blocks; be equipped with a plurality of mounting holes on the basis piece, a plurality of monomer test blocks are installed in the mounting hole, and the hardness number of a plurality of monomer test blocks is different. A plurality of monomer test blocks with different hardness values are installed in the installation hole of the foundation block, so that the stability of the monomer test blocks is ensured, and the displacement and the shaking cannot occur during detection. After the material quality, the processing technology and other parameters of the detection target are determined, the monomer test blocks with a plurality of hardness values can be selected according to the parameters, and then the hardness meter is checked on the most appropriate monomer test block according to the actual hardness range value of the detection target on site, so that the accuracy of the used hardness meter can be ensured to the maximum extent. Meanwhile, only one foundation block and a plurality of single test blocks need to be carried, calibration and checking of different hardness ranges on one test block can be achieved, and testing precision and operability are greatly improved.
Description
Technical Field
The invention belongs to the technical field of inspection and detection, and relates to a field calibration test block for a Leeb hardness test.
Background
The hardness value of the metal material is one of important parameters for evaluating the mechanical property of the metal material, and can be obtained by a quick, economic and simple method, so that the hardness detection is widely applied to the inspection and detection of the metal material, for example, the hardness detection is one of main detection items for inspecting and accepting a steel pipe base metal and a welding line, and is also one of main items for evaluating the safety of pressure-bearing key equipment of an in-service generator set.
In the field maintenance of the in-service unit, the portable Richter hardness tester is mainly used for rapidly detecting the field hardness. The hardness standard test block is an essential part of a hardness tester and is the only verification method for confirming whether the test value of the hardness tester is accurate. Generally, the standard Richter hardness test block is large in size and weight and not easy to carry, and only one standard test block is usually used for calibration in field detection. The hardness value selectivity of the standard hardness test block is small in practice, the limitation is large, the hardness requirement range of different detected parts on site cannot be completely met, the difference between the hardness value range and the required hardness value range is often far, the hardness tester is calibrated by using the test block with a single hardness value, and when the hardness of the detected part with a large hardness range difference is measured, the measurement result cannot truly and accurately reflect the actual hardness value of the detected part.
Therefore, when the hardness requirement range of the part to be detected and the hardness value difference of the standard hardness test block of the Leeb hardness meter are large, large errors often occur when the part to be detected is detected, the false detection of the base metal and the welding line of the part is easily caused, and potential safety hazards and unnecessary loss are brought to a generator set.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a calibration test block for on-site hardness testing, which can calibrate and check different measurement ranges of a hardness tester to meet the requirement of hardness testing precision.
The invention is realized by the following technical scheme:
the invention discloses a field calibration test block for a Leeb hardness test, which comprises a foundation block and a plurality of monomer test blocks; be equipped with a plurality of mounting holes on the basis piece, a plurality of monomer test blocks are installed in the mounting hole, and the hardness number of a plurality of monomer test blocks is different.
Preferably, the single test block is an external thread cylinder, and the mounting hole is a screw hole matched with the thread of the single test block.
Preferably, the outer wall of the single test block and the inner wall of the mounting hole are respectively provided with a convex strip and a guide groove which are matched with each other.
Further preferably, the outer wall of the single test block is provided with a convex strip, the inner wall of the mounting hole is provided with a guide groove, the length of the guide groove is smaller than that of the mounting hole, and the length of the convex strip is equal to that of the guide groove.
Preferably, the mounting hole is a through hole, and an annular limiting boss is arranged in the mounting hole.
Preferably, the mounting hole is a blind hole, and the bottom of the mounting hole is provided with an exhaust hole communicated with the outside of the base block.
Preferably, the thickness of the monomer test block is greater than 70 mm.
Preferably, the total weight of the base block and the plurality of monomer test blocks is greater than 5 kg.
Preferably, the difference of the Brinell hardness of the monomer test blocks is 25-35 HBHLD.
Preferably, the distance between the axes of the adjacent mounting holes is 1.5 times the maximum width of the single test block.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the field-used Leeb hardness test calibration test block disclosed by the invention, the plurality of monomer test blocks with different hardness values are installed in the installation holes of the foundation block, so that the stability of the monomer test blocks is ensured, and displacement and shaking can not occur during detection. After the material quality, the processing technology and other parameters of the detection target are determined, the monomer test blocks with a plurality of hardness values can be selected according to the parameters, and then the hardness meter is checked on the most appropriate monomer test block according to the actual hardness range value of the detection target on site, so that the accuracy of the used hardness meter can be ensured to the maximum extent. Meanwhile, only one foundation block and a plurality of single test blocks need to be carried, calibration and checking of different hardness ranges on one test block can be achieved, and testing precision and operability are greatly improved.
Furthermore, the monomer test block is the external screw thread cylinder, and the mounting hole is the screw that matches with the screw of monomer test block, simple to operate, and it is comparatively inseparable to combine, and stability is high.
Further, monomer test block outer wall and mounting hole inner wall are equipped with sand grip and the guide slot that matches each other respectively, and this structure processing is simple, and the cooperation is good.
Further, when the mounting hole is the blind hole, the bottom of mounting hole is equipped with the exhaust hole with the outside intercommunication of basic piece, can avoid piston effect, and the installation is simple high-efficient.
Furthermore, the thickness of the single test block is larger than 70mm, the detection meets the relevant requirements, and the accuracy of the detection value is ensured.
Furthermore, the total weight of the foundation block and the plurality of monomer test blocks is more than 5kg, so that enough stability can be reported, the detection meets the relevant requirements, and the accuracy of the detection value is ensured.
Furthermore, the Brinell hardness difference value of the single test blocks is 25-35 HBHLD, the specification number of the single test blocks can be reduced on the premise of ensuring the detection range and precision, and therefore the manufacturing cost is reduced.
Furthermore, the distance between the axes of the adjacent mounting holes is 1.5 times of the maximum width of the single test block, so that the detection head of the hardness tester cannot enter the range of the adjacent single test block during detection, and the detection precision is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of embodiment 1;
FIG. 3 is a schematic structural view of example 5.
In the figure, 1 is a base block, 2 is a monomer test block, 2-1 is a first monomer test block, 2-2 is a second monomer test block, 2-3 is a third monomer test block, 2-4 is a fourth monomer test block, 2-5 is a fifth monomer test block, 3 is a mounting hole, 3-1 is a first mounting hole, 3-2 is a second mounting hole, 3-3 is a third mounting hole, 3-4 is a fourth mounting hole, and 3-5 is a fifth mounting hole.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
referring to fig. 1, the field calibration test block for the richter hardness test of the present invention comprises a base block 1 and a plurality of single test blocks 2; be equipped with a plurality of mounting holes 3 on the basis piece 1, a plurality of monomer test blocks 2 are installed in mounting hole 3, and the hardness number of a plurality of monomer test blocks 2 is different. The thickness of the monomer test block 2 is more than 70 mm; the total weight of the base block 1 and the plurality of monomer test blocks 2 is more than 5 kg; the Brinell hardness difference of the monomer test blocks 2 is 25-35 HBHLD; the distance between the axes of the adjacent mounting holes 3 is 1.5 times of the maximum width of the single test block 2.
Example 1
The basis piece 1 is the cylinder, is equipped with a plurality of cylinder mounting holes 3 on the basis piece 1, and after mounting hole 3 was installed into to a plurality of monomer test blocks 2, realized fixedly through the one end with the welding of basis piece 1 of monomer test block 2. The welding adopts spot welding and can be removed or replaced after detection.
Example 2
The foundation block 1 is a cylinder, a plurality of mounting holes 3 are arranged on the foundation block 1, the mounting holes 3 are screw holes, the single test block 2 is a stud, and the single test block 2 can be screwed into the mounting holes 3.
Example 3
Be equipped with a plurality of mounting holes 3 on the basis piece 1, be equipped with the sand grip on the outer wall of monomer test block 2, be equipped with the guide slot on the inner wall of mounting hole 3. Preferably, the length of the guide groove is smaller than that of the mounting hole 3, and the length of the convex strip is equal to that of the guide groove.
Example 4
Be equipped with a plurality of mounting holes 3 on the basis piece 1, mounting hole 3 is the through-hole, and the bottom region of mounting hole 3 is equipped with cyclic annular spacing boss.
Example 5
As shown in fig. 3, a plurality of mounting holes 3 are formed in the foundation block 1, the mounting holes 3 are blind holes, and exhaust holes communicated with the outside of the foundation block 1 are formed in the bottoms of the mounting holes 3.
The selection of the particular parameters of each component is further illustrated by the following one of the specific embodiments:
as shown in fig. 2, the base block 1 is a cylinder having a diameter of 120mm and a thickness of 70 mm. The foundation block 1 is provided with a first mounting hole 3-1, a second mounting hole 3-2, a third mounting hole 3-3, a fourth mounting hole 3-4 and a fifth mounting hole 3-5, wherein the axes of the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole and the fifth mounting hole are all parallel to the axis of the foundation block 1, the diameters of the 5 mounting holes are all 30mm, and the distance between the axes of the adjacent mounting holes is 40 mm.
The first monomer test block 2-1, the second monomer test block 2-2, the third monomer test block 2-3, the fourth monomer test block 2-4 and the fifth monomer test block 2-5 are cylinders, the diameters of the cylinders are 29mm, and the thicknesses of the cylinders are 70 mm; the Brinell hardness values of the 5 test blocks are 140-145 HBHLD, 180-185 HBHLD, 210-215 HBHLD, 250-255 HBHLD and 295-300 HBHLD respectively.
When the invention is used:
1) measuring the end faces of all the monomer test blocks 2 by using a desk type Brinell hardness tester which is qualified in verification, and calibrating the numerical values; obtaining the approximate hardness range value of the detection target according to the known parameters of the material, the processing technology and the like of the detection target, and carrying the single test block 2 according to the value;
2) after the monomer test block 2 and the foundation block 1 are assembled on site, selecting the monomer test block 2 with the closest numerical value according to the actual hardness numerical value of a detection target, measuring the monomer test block 2 by using a Leeb hardness tester, and checking the Leeb hardness tester according to the calibration numerical value and the measurement value of the monomer test block 2;
3) and testing the detection target by using the checked Leeb hardness tester.
It should be noted that the above description is only one embodiment of the present invention, and all equivalent changes of the system described in the present invention are included in the protection scope of the present invention. Persons skilled in the art to which this invention pertains may substitute similar alternatives for the specific embodiments described, all without departing from the scope of the invention as defined by the claims.
Claims (10)
1. A field calibration test block for a Leeb hardness test is characterized by comprising a base block (1) and a plurality of monomer test blocks (2); be equipped with a plurality of mounting holes (3) on basic block (1), install in mounting hole (3) a plurality of monomer test blocks (2), the hardness number of a plurality of monomer test blocks (2) is different.
2. The on-site Leeb hardness test calibration block according to claim 1, characterized in that the monoblock (2) is an externally threaded cylinder and the mounting hole (3) is a threaded hole matching the threads of the monoblock (2).
3. The on-site Leeb hardness test calibration block according to claim 1, wherein the outer wall of the single block (2) and the inner wall of the mounting hole (3) are respectively provided with a rib and a guide groove which are matched with each other.
4. The on-site Leeb hardness test calibration block according to claim 3, wherein the outer wall of the single block (2) is provided with a convex strip, the inner wall of the mounting hole (3) is provided with a guide groove, the length of the guide groove is less than that of the mounting hole (3), and the length of the convex strip is equal to that of the guide groove.
5. The on-site Leeb hardness test calibration block according to claim 1, wherein the mounting hole (3) is a through hole, and an annular limiting boss is arranged in the mounting hole (3).
6. The on-site Leeb hardness test calibration block according to claim 1, wherein the mounting hole (3) is a blind hole, and the bottom of the mounting hole (3) is provided with an exhaust hole communicated with the outside of the base block (1).
7. The field use Leeb hardness test calibration block according to claim 1, wherein the thickness of the monolithic block (2) is more than 70 mm.
8. The site-specific use of the Leeb hardness test calibration block according to claim 1, wherein the total weight of the base block (1) and the plurality of test blocks (2) is greater than 5 kg.
9. The field calibration test block using the Richch hardness test of claim 1, wherein the Brinell hardness difference of the plurality of test blocks (2) is 25-35 HBHLD.
10. The site-specific Leeb hardness test calibration block according to claim 1, wherein the distance between the axes of adjacent mounting holes (3) is 1.5 times the maximum width of the individual block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462332.1A CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462332.1A CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
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| Publication Number | Publication Date |
|---|---|
| CN113092301A true CN113092301A (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110462332.1A Pending CN113092301A (en) | 2021-04-27 | 2021-04-27 | On-spot with experimental calibration test block of richter hardness |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
| CN113848100A (en) * | 2021-09-08 | 2021-12-28 | 河南中原特钢装备制造有限公司 | Method for manufacturing reference block of chromium coating hardness of retained mandrel for tandem rolling mill |
-
2021
- 2021-04-27 CN CN202110462332.1A patent/CN113092301A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607513A (en) * | 2021-07-20 | 2021-11-05 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking low-hardness 91 steel hardness value |
| CN113607513B (en) * | 2021-07-20 | 2023-06-23 | 华电电力科学研究院有限公司 | Test block and method capable of rapidly checking hardness value of low-hardness 91 steel |
| CN113848100A (en) * | 2021-09-08 | 2021-12-28 | 河南中原特钢装备制造有限公司 | Method for manufacturing reference block of chromium coating hardness of retained mandrel for tandem rolling mill |
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