Brinell hardness (HB) is generally used when materials are softer、 such as non-ferrous metals、 steel before heat treatment、 or after annealing. Brinell hardness (HB) is the process of pressing a hardened steel ball or hard alloy ball with a certain diameter into the surface of the tested metal under a certain test load、 holding it for a specified time、 and then unloading it to measure the diameter of the indentation on the tested surface. The Brinell hardness value is the quotient obtained by dividing the load by the spherical surface area of the indentation. Generally、 a certain size of quenched steel ball is pressed into the surface of the material under a certain load、 maintained for a period of time、 and after unloading、 the ratio of the load to the indentation area is the Brinell hardness value (HB)、 in kilograms of force/(N/). The test load and the diameter of the test steel ball need to be determined based on the actual performance of the material P>
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