What are the measurement requirements for a Leeb Hardness Tester?

Abstract: 这篇文章概述了使用里氏硬度计进行测量的要求。首先，试样表面应光滑无污垢，表面粗糙度需符合规定。试样需要足够的质量和刚度，以防止测试时的位移或反弹。试样的最小厚度应达到标准要求。此外，如果试样表面有硬化层，其深度也需符合规定。对于各种形状的试样（如凹面、凸面、圆柱形和球形），表面曲率半径需满足标准要求，并应使用适当的支撑环以确保测试精度。试样不应具有磁性。每个测量点之间的距离应大于3~4mm，以避免在同一点重复测试，从而减少误差并延长传感器的使用寿命。

1. Requirements for the surface of the sample

The test surface should have metallic luster, no scale and other dirt, and the surface roughness should meet the following requirements:

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2. Sample weight requirements

Specimens need to be of sufficient mass and stiffness to ensure no displacement or rebound during reconstruction. Quality should meet the following requirements:

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3. Sample thickness requirements

The sample should have sufficient thickness, and the minimum thickness should meet the following requirements:

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4. There is a hardened layer on the surface of the sample, and the depth of the hardened layer should meet the following requirements:

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5. For concave, convex, cylindrical and spherical samples, the surface curvature radius should meet the following requirements:

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For specimens with curved surfaces, appropriate support rings should be used to ensure that the position deviation of the impact head is within 0.5mm during impact.