A standard test block for measuring the depth of a hardening layer on a metal surface

Abstract

The present application belongs to the field of hardened layer depth detection, and relates to a metal surface hardened layer depth standard test block. The whole standard test block is half-boat-shaped. A stepped hardened layer area is arranged at the upper end of the standard test block, which is used for detecting the hardened layer depth of a planar component. A small-curvature outer-arc-surface hardened layer area is arranged at the left end, which is used for detecting the hardened layer depth of the outer surface of a thin shaft component and a special-shaped component. A small-curvature inner-arc-surface hardened layer area is arranged at the lower end, which is used for detecting the hardened layer depth of the inner surface of a pipe component and a special-shaped component. A large-curvature outer-arc-surface hardened layer area is arranged at the right end, which is used for detecting the hardened layer depth of the outer surface of a column component, a shaft component, a pipe component and a disc component. A large-curvature inner-arc-surface hardened layer area is arranged at the upper right end, which is used for detecting the hardened layer depth of the inner surface of a pipe component and a disc component. The test block of the present application can meet the requirements of hardened layer depth detection equipment calibration and hardened layer depth verification of various components.

Description

Technical Field

[0001] This invention belongs to the field of hardened layer depth detection and relates to a standard test block for the hardened layer depth of a metal surface. Background Technology

[0002] Hardened layer depth standard blocks are important tools for calibrating and validating hardened layer depth testing equipment and methods. Hardened layer depth testing equipment requires calibration before use to ensure the accuracy of measurement results. Standard blocks provide known hardened layer depth values; by measuring these blocks, the parameters of the testing equipment can be adjusted to make the measurement results conform to the standard values. Commonly used hardened layer depth standard blocks include: single hardened layer depth blocks, stepped hardened layer depth blocks, and hardened layer depth blocks simulating actual parts.

[0003] Single-layer-depth standard test blocks have a single hardened layer depth and are typically used to calibrate and validate testing equipment and methods within a specific depth range. For example, a standard test block with a hardened layer depth of 1 mm can be used to calibrate and validate the measurement accuracy of testing equipment within a depth range of 0.8 mm to 1.2 mm.

[0004] A stepped hardening layer depth standard test block has multiple hardening layers of different depths and is typically used to verify the measurement accuracy and linearity of testing equipment within different depth ranges. For example, a stepped hardening layer depth test block can have hardening layers of different depths, such as 1 mm, 2 mm, and 3 mm. By measuring these different depths, the measurement performance of the testing equipment within different depth ranges can be verified.

[0005] Standard test blocks simulating actual parts have similar shapes and sizes to the actual parts and are typically used to verify the feasibility and accuracy of testing equipment in practical applications. For example, a standard test block simulating a car engine crankshaft can be used to verify the accuracy and reliability of ultrasonic non-destructive testing equipment in detecting the depth of the hardened layer on the crankshaft.

[0006] The metal surfaces being inspected mainly include flat surfaces, outer curved surfaces, inner curved surfaces, and irregularly shaped surfaces. When inspecting the surface hardening layer depth of components that simultaneously have flat and curved surfaces, it is necessary to carry single hardening layer depth test blocks, stepped hardening layer depth test blocks, and hardening layer depth test blocks simulating actual parts to comprehensively calibrate and verify the depth of the testing equipment. However, these three types of test blocks have relatively simple structures and functions, making them difficult to package and carry during actual testing, resulting in low testing efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a standard test block for the hardened layer depth of a semi-boat-shaped metal surface. This test block integrates a standard stepped hardened layer depth region, a hardened layer depth region on a large-curvature outer arc surface, a hardened layer depth region on a large-curvature inner arc surface, a hardened layer depth region on a small-curvature outer arc surface, and a hardened layer depth region on a small-curvature inner arc surface. This simultaneously meets the needs for calibration and verification of hardened layer depth testing equipment for planar components with different hardened layer depths, columnar, shaft, tubular, and disc-shaped components with large-curvature outer and inner arc surfaces, and shaftar, tubular, and irregularly shaped components with small-curvature outer and inner arc surfaces, significantly improving testing efficiency.

[0008] The solution adopted in this invention is as follows:

[0009] A standard test block for the depth of a hardened layer on a metal surface is generally semi-boat-shaped. A stepped hardened layer area 1 is set at the upper end of the standard test block, a hardened layer area 2 with a small curvature outer arc surface is set at the left end, a hardened layer area 3 with a small curvature inner arc surface is set at the lower end, a hardened layer area 4 with a large curvature outer arc surface is set at the lower right end, i.e., the bow position, and a hardened layer area 5 with a large curvature inner arc surface is set at the upper right end.

[0010] Among them, the stepped hardening layer area 1 is used to detect the hardening layer depth of planar components; the small curvature outer arc surface hardening layer area 2 is used to detect the hardening layer depth of the outer surface of thin shafts and irregularly shaped components; the small curvature inner arc surface hardening layer area 3 is used to detect the hardening layer depth of the inner surface of pipes and irregularly shaped components; the large curvature outer arc surface hardening layer area 4 is used to detect the hardening layer depth of the outer surface of column, shaft, pipe and disc components; and the large curvature inner arc surface hardening layer area 5 is used to detect the hardening layer depth of the inner surface of pipe and disc components.

[0011] Furthermore, the standard test block for the depth of the hardened layer on the metal surface has a length of 200 mm, a width of 115 mm, and a thickness of 20 mm.

[0012] Furthermore, the length of the stepped hardening layer region 1 is 200 mm.

[0013] Furthermore, the stepped hardening layer area has 10 different depths of hardening layers at 20mm intervals from right to left, with depths of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, and 15mm respectively.

[0014] Furthermore, the length of the hardened layer region 2 on the small curvature outer arc surface is 115 mm, the radius of curvature is 15 mm, and the depth of the hardened layer is 5 mm.

[0015] Furthermore, the length of the hardened layer region 3 on the small curvature inner arc surface is 100 mm, the radius of curvature is 15 mm, and the depth of the hardened layer is 5 mm.

[0016] Furthermore, the radius of curvature of the hardened layer region 4 on the large curvature outer arc surface is 50 mm, and the depth of the hardened layer is 5 mm.

[0017] Furthermore, the radius of curvature of the hardened layer region 5 on the large curvature inner arc surface is 50 mm, and the depth of the hardened layer is 5 mm.

[0018] Furthermore, the depth deviation of the hardened layer of the test block does not exceed ±0.05 mm.

[0019] Furthermore, the hardening treatment method of the standard test block for hardened layer depth should be the same as or similar to that of the actual part to ensure that the hardened layer structure and performance of the test block are consistent with the hardened layer of the actual part.

[0020] The beneficial effects of this invention are:

[0021] The semi-boat-shaped standard test block for the hardened layer depth of metal surfaces integrates a standard stepped hardened layer region, a hardened layer region with large curvature outer arc surface, a hardened layer region with large curvature inner arc surface, a hardened layer region with small curvature outer arc surface, and a hardened layer region with small curvature inner arc surface. This test block simultaneously meets the needs for calibration and verification of hardened layer depth testing equipment for planar components with different hardened layer depths, columnar, shaft, tubular, and disc-shaped components with hardened layer depths on large curvature outer and inner arc surfaces, and shaftar, tubular, and irregularly shaped components with hardened layer depths on small curvature outer and inner arc surfaces.

[0022] Hardened layer depth standard test blocks are indispensable tools in hardened layer depth testing. They provide important reference data for the calibration of testing equipment, the verification of testing methods, and the quality control of the production process. When using standard test blocks, the manufacturing requirements and usage methods should be strictly followed to ensure the accuracy and reliability of the measurement results. Attached Figure Description

[0023] Figure 1 It is a test block for the depth of the hardened layer on a semi-boat-shaped metal surface;

[0024] Figure 2 This is a schematic diagram showing the depth and distribution of the hardened layer on the surface of a semi-boat-shaped metal. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] The standard test block for the depth of the hardened layer on the metal surface designed in this invention is semi-boat-shaped, with a length of 200mm, a width of 115mm, and a thickness of 20mm.

[0027] A stepped hardening layer region 1 was set at the upper end of a standard test block for the depth of the hardened layer on a metal surface; a small-curvature outer arc surface hardening layer region 2 was set at the left end; a small-curvature inner arc surface hardening layer region 3 was set at the lower end; a large-curvature outer arc surface hardening layer region 4 was set at the lower right end (the bow position); and a large-curvature inner arc surface hardening layer region 5 was set at the upper right end. The stepped hardening layer region 1 has a length of 200 mm; the small-curvature outer arc surface hardening layer region 2 has a length of 115 mm and a radius of curvature of 15 mm; the small-curvature inner arc surface hardening layer region 3 has a length of 100 mm and a radius of curvature of 15 mm; the large-curvature outer arc surface hardening layer region 4 has a radius of curvature of 50 mm; and the large-curvature inner arc surface hardening layer region 5 has a radius of curvature of 50 mm. Figure 1 As shown.

[0028] The stepped hardening layer area features 10 different depths of hardening layers spaced 20mm apart from right to left, with depths of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, and 15mm respectively. Figure 2 As shown. The size of the test block can also be appropriately increased to create a deeper hardening layer, depending on the actual testing requirements.

[0029] When calibrating instruments for measuring the hardened layer of metals using this standard test block, the stepped hardened layer depth region can be used to detect the hardened layer depth of planar components. A hardened layer depth of 5mm is found on the outer surface of a small-curvature outer arc surface, suitable for detecting the hardened layer depth on the outer surfaces of thin shafts and irregularly shaped components. A hardened layer depth of 5mm is found on the inner surface of pipes and irregularly shaped components (such as the root of gears). A hardened layer depth of 5mm is found on the outer surface of a large-curvature outer arc surface, suitable for detecting the hardened layer depth on the outer surfaces of columnar, shaft, pipe, and disc-shaped components; a hardened layer depth of 5mm is found on the inner surface of pipe and disc-shaped components.

[0030] The material of the standard test block for the hardened layer depth of this invention should be the same as or similar to the actual test material to ensure that the hardened layer characteristics of the test block are consistent with those of the actual part. If the actual test material is steel, then the standard test block should also be made of steel. At the same time, the hardness, strength, and other mechanical properties of the test block should also be similar to those of the actual part to ensure the accuracy of the measurement results.

[0031] The hardening treatment method for the standard test block of the hardened layer depth of the present invention should be the same as or similar to the hardening treatment method of the actual part to ensure that the hardened layer structure and properties of the test block are consistent with those of the actual part. For example, if the actual part uses quenching treatment to obtain the hardened layer, then the standard test block should also be quenched. At the same time, the process parameters of the hardening treatment, such as quenching temperature and cooling rate, should also be similar to the processing parameters of the actual part to ensure the quality of the hardened layer of the test block.

[0032] The dimensional accuracy of the standard test block for the hardened layer depth of this invention should meet the requirements of relevant standards to ensure the dimensional stability and measurement accuracy of the test block. For example, the geometric tolerances such as flatness, parallelism, and perpendicularity of the test block should be controlled within a certain range to ensure good contact between the probe and the surface of the test block, thereby improving the accuracy of the measurement results.

[0033] The hardened layer depth of the standard test block of the present invention should have good uniformity to ensure the reliability of the measurement results. For example, the deviation of the hardened layer depth of the test block should be controlled within a certain range, usually not exceeding ±0.05 mm.

[0034] Key points of this invention:

[0035] 1. The standard test block for the depth of the hardened layer on the metal surface is semi-boat-shaped. A stepped hardened layer area is set at the upper end of the test block, a hardened layer area with a small curvature outer arc surface is set at the left end, a hardened layer area with a small curvature inner arc surface is set at the lower end, a hardened layer area with a large curvature outer arc surface is set at the lower right end, and a hardened layer area with a large curvature inner arc surface is set at the upper right end.

[0036] 2. The stepped hardening layer area features 10 different depths of hardening layer spaced 20mm apart from right to left, with depths of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, and 15mm respectively. The specimen size can be appropriately increased to create deeper hardening layers based on actual testing needs. The stepped hardening layer depths can be used for instrument calibration and depth verification when testing the hardening layer depth of planar components.

[0037] 3. The hardened layer depth of the small curvature outer arc surface is 5mm, which can be used to detect the hardened layer depth of the outer surface of thin shafts and irregularly shaped components.

[0038] 4. The hardened layer depth of the small curvature inner arc surface is 5mm, which can be used to detect the hardened layer depth of the inner surface of pipes and irregularly shaped components (such as the root of gears).

[0039] 5. The hardened layer depth of the large curvature outer arc surface is 5mm, which can be used to detect the hardened layer depth of the outer surface of column, shaft, pipe and disc components.

[0040] 6. The hardened layer depth of the large curvature inner arc surface is 5mm, which can be used to detect the hardened layer depth of the inner surface of pipe and disc components.

Claims

1. A standard test block for the depth of a hardened layer on a metal surface, characterized in that, The standard test block for the depth of the hardened metal surface layer is semi-boat-shaped. The length of the standard test block is 200mm, the width is 115mm, and the thickness is 20mm. A stepped hardened layer area (1) is set at the upper end of the standard test block, an outer arc hardened layer area with a curvature radius of 15mm is set at the left end (2), an inner arc hardened layer area with a curvature radius of 15mm is set at the lower end (3), an outer arc hardened layer area with a curvature radius of 50mm is set at the lower right end, i.e., the bow position (4), and an inner arc hardened layer area with a curvature radius of 50mm is set at the upper right end (5). Among them, the stepped hardening layer area (1) is used to detect the hardening layer depth of planar components; the outer arc surface hardening layer area (2) with a curvature radius of 15mm is used to detect the hardening layer depth of the outer surface of thin shafts and irregularly shaped components; the inner arc surface hardening layer area (3) with a curvature radius of 15mm is used to detect the hardening layer depth of the inner surface of pipes and irregularly shaped components; the outer arc surface hardening layer area (4) with a curvature radius of 50mm is used to detect the hardening layer depth of the outer surface of column, shaft, pipe and disc components; and the inner arc surface hardening layer area (5) with a curvature radius of 50mm is used to detect the hardening layer depth of the inner surface of pipe and disc components.

2. The standard test block for the depth of a hardened layer on a metal surface as described in claim 1, characterized in that, The length of the stepped hardened layer area (1) is 200 mm.

3. The standard test block for the depth of a hardened layer on a metal surface as described in claim 2, characterized in that, The stepped hardening layer area has 10 different depths of hardening layer with a spacing of 20mm from right to left, with depths of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm and 15mm respectively.

4. The standard test block for the depth of a hardened layer on a metal surface as described in claim 1, characterized in that, The hardened layer region (2) of the outer arc surface with a curvature radius of 15 mm has a length of 115 mm and a hardened layer depth of 5 mm.

5. A standard test block for the depth of a hardened layer on a metal surface as described in claim 1, characterized in that, The inner arc surface hardened layer region (3) with a curvature radius of 15mm has a length of 100mm and a hardened layer depth of 5mm.

6. A standard test block for the depth of a hardened layer on a metal surface as described in claim 1, characterized in that, The hardened layer region of the outer arc surface with a curvature radius of 50 mm (4) has a hardened layer depth of 5 mm.

7. A standard test block for the depth of a hardened layer on a metal surface as described in claim 1, characterized in that, The hardened layer region of the inner arc surface with a curvature radius of 50 mm (5) has a hardened layer depth of 5 mm.

8. A standard test block for the depth of a hardened layer on a metal surface as described in any one of claims 4 to 7, characterized in that, The depth deviation of the hardened layer of the test block shall not exceed ±0.05mm.

9. A standard test block for the depth of a hardened layer on a metal surface as described in claim 8, characterized in that, The hardening treatment method for the standard test block of hardened layer depth should be the same as or similar to the hardening treatment method of the actual part to ensure that the hardened layer structure and performance of the test block are consistent with the hardened layer of the actual part.

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