"Analysis of the external quenching treatment skills of bearings"

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"Analysis of the external quenching treatment skills of bearings"

Source: Bearing network time: 2013-01-28
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The Vickers hardness tester is an important method to test the hardness of the heat treated workpiece; it can be used with an experimental force of 0.5 to 100 kg; the test is as thin as 0.05 mm thick; the precision is the highest; the heat can be distinguished The hardness of the surface of the treated workpiece is different. Others; the depth of the useful hardened layer is also measured by the Vickers hardness tester; therefore; the unit for performing external heat treatment or many parts for external heat treatment; equipped with a Vickers hardness tester It is necessary.
The external Rockwell hardness tester is also very suitable for testing the hardness of the externally quenched workpiece; the appearance of the Rockwell hardness tester can be selected by three kinds of scales. It can test various hardened workpieces with a hardening depth exceeding 0.1 mm. Although the appearance of the Rockwell hardness tester Accuracy is not as high as Vickers hardness tester; however, it is used as a quality management and qualified inspection method for heat treatment plants; it can now meet the requirements. Moreover, it has simple operation, convenient operation and low price; it is quick to measure and can directly read hardness. Features such as value; using the external Rockwell hardness tester to perform rapid and non-destructive part-by-piece inspection of batches of external heat treatment workpieces. This is of great significance for metal processing and mechanical manufacturing plants.
When the external heat treatment hardening layer is thicker; Rockwell hardness tester can also be used. When the thickness of the heat treatment hardened layer is 0.4 to 0.8 mm; the HRA scale can be used; when the thickness of the hardened layer exceeds 0.88 mm; Use HRC ruler.
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