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Handling Precautions For Portable Hardness Testers
Oct 11, 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.