What are the classification and characteristics of the Brinell hardness tester?

The Brinell hardness tester is mainly used to test the hardness of forged steel and cast iron with uneven structures. The Brinell hardness of forged steel and gray cast iron has a good corresponding relationship with the tensile test. The Brinell hardness tester is mostly used for the inspection of raw materials and semi-finished products. Due to the large indentation, it is generally not used for the inspection of finished products.

Here is the content list:

●What types of Brinell hardness testers can be divided into?

●What are the characteristics of the Brinell hardness tester?

What types of Brinell hardness testers can be divided into?

1. Large Brinell hardness tester: portal frame, large movable platform, the maximum moving distance is 1000mm; the test height of the test piece can be up to 950mm; the horizontal movement distance of the spindle is 500mm; it is the largest Brinell hardness tester in China, especially suitable for Determine the Brinell hardness of large metal parts. 2. Hammered Brinell hardness tester: the hammered Brinell hardness tester applies a test force to the steel ball by hammering. The steel ball is pressed into the sample instantly under the action of the hammering force, leaving an indentation on the sample. Measure the indentation diameter and look up the table to get the Brinell hardness value.

What are the characteristics of the Brinell hardness tester?

1. The Brinell hardness tester is simple to operate, easy to carry, has no sampling, has fast test speed, and has low requirements on the surface of the sample. 2. The Brinell hardness tester uses the Brinell hardness test principle to press a large-diameter ball indenter into the surface of the sample. The test area is large, and it is suitable for testing large-scale castings and forgings with relatively coarse grains. 3. The Brinell hardness tester has a simple structure and a low price. It is a relatively inexpensive instrument. 4. The Brinell hardness test is an impact hardness test method. The indentation of the steel ball is completed instantaneously. It is not like the standard Brinell hardness test. The test force can be maintained for several seconds to allow the metal at the indentation to achieve sufficient plastic deformation. Therefore, the test accuracy of the hammered Brinell hardness tester is lower than that of the desktop Brinell hardness tester. 5. Although the hammer Brinell hardness tester belongs to the impact hardness test method with lower accuracy, it belongs to the Brinell hardness test with higher accuracy among various hardness test methods. There are relatively few influencing factors on the test results, the test results are relatively stable, and the test values are relatively reliable. 6. The hammered Brinell hardness tester is the same as the desktop Brinell hardness tester. After the test, a Brinell hardness indentation that can be repeatedly tested at any time will be left on the workpiece. When there is doubt about the test result or the supply and demand sides have disagreements The Brinell indentation can be checked again. This is better than the Leeb hardness tester.

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