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Handling precautions for portable hardness testers
Oct 16, 2018

Handling precautions for portable hardness testers


Let's talk about the following small series, the operation precautions of the portable hardness tester


1. The surface temperature of the workpiece should not be overheated and should be less than 120 °C.


2. The surface roughness of the workpiece should not be too large, otherwise it will cause measurement error. The surface to be tested of the workpiece must be exposed to metallic luster and be smooth, smooth and free of oil.


3. The test piece or thin-walled test piece with the overhanging part of 2-5kg should be supported by the object during the test to avoid the deformation, deformation and movement of the test piece caused by the impact force; Flat, sturdy on the plane.


4. The jue must be placed smoothly without any shaking; only heavy samples larger than 5kg can be directly measured without support. The portable Leeb hardness tester has strict requirements on the thickness of the workpiece to be tested, and the workpiece * small thickness should meet the specifications of the specification.


5. For workpieces with a hardfacing layer, the depth of the hardened layer shall conform to the specifications of the specification.


6. For lighter workpieces, it must be tightly coupled with a solid support. The two coupling surfaces must be flat and smooth, and the amount of coupling agent should not be too much. The test direction must be perpendicular to the coupling plane; when the workpiece is a large-area plate, long When the rod or the bent part is used, even if the weight and thickness are large, the deformation and instability of the test piece may be caused, resulting in the test value being inaccurate. Therefore, the magnet should be reinforced or supported on the back side of the test point. The magnet should be less than 30 Gaussian surface workpiece: workpiece The test surface * is a flat surface.


7. When the workpiece with a radius of curvature R of less than 30 mm is to be tested, a small support ring or a profiled support ring should be used for testing.


8. Keep away from vibration, strong magnetic field, corrosive medium, moisture and dust during storage. Store at room temperature.


9. Under the condition of ensuring the original packaging during transportation, it can be carried out under the conditions of the third-grade highway.


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