You Want to Know the Difference Between Lowe’s, BrucelLAe and Vickers

The difference and connection between Brinell, Rockwell, and Vickers's hardness

Differences among the three:

1.Rockwell hardness is used to test quenched steel, tempered steel, and some stainless steel, test all kinds of annealed steel, normalizing steel, mild steel, some stainless steel, and hard copper alloy, test pure copper, soft copper alloy, and duraluminum.

2.Brinell hardness is suitable for the hardness test of forged steel and cast iron with uneven structure; Brinell hardness test can also be used for non-ferrous metals and mild steel, small diameter ball indenter can measure the small size and thin materials. The Brinell hardness tester is mainly used for raw materials and semi-finished products.

3.Vickers hardness test thin to 0.05mm thick surface hardening layer, its accuracy is the highest, can distinguish the small differences in the surface hardness of the heat treatment workpiece.

Contact:

1.All three are tested by static pressure detection force. The calculation formula of Brinell and Vickers is the quotient obtained by dividing the detection force by the indentation area, and Rockwell hardness is related to the indentation depth.

2. from the use of time, Brucellae is the earliest, followed by Lowe’s, and the last is Vickers. Compared with the first two Vickers from the design principle, there is an obvious point: you can choose any testing force, and the measured hardness value is unchanged.

3.Brinell and Vickers apply the detection force directly for testing, while Rockwell has an initial detection force and then applies the main detection force. Therefore, compared with the other two kinds of hardness, Rockwell has little influence on the hardness value due to the slight roughness of the material surface.

4.Brinell adopts the large pressure head diameter; for soft metal, the hardness value measured is very accurate. Rothschild’s operation is simple, can read directly, and is suitable for mass inspection; Vickers can measure the hardness of materials from very soft to very hard, and all of them are the same scale, which can reflect the hardness of the material more intuitively.

The advantages of Brinell, Rockwell, and Vickers durometers are introduced.

Advantages of Rockwell hardness:

Rockwell hardness tester is easy to operate, has high test efficiency, and is very suitable for industrial production of batch testing. The load force is small, and the indentation size is smaller than that of Brinell hardness, so Rockwell hardness is more suitable for the test of the thin strip and thin wall tube. Different Rockwell hardness scales have different indenter and total test forces, resulting in a wide range of Rockwell hardness values. Rockwell hardness test has the initial test force, so the slight unevenness of the sample surface has little influence on the test value.

Advantages of Vickers hardness tester:

The indentation of the Vickers hardness test is square, the light profile is clear, and the diagonal measurement is accurate. Therefore, the Vickers hardness test is the most accurate hardness test method in common use, and its repeatability is also good, which is superior to the Brinell hardness tester.

The Vickers hardness test has a wide range of measurements. It can measure almost all metal materials used in industry today, from very soft materials (a few Vickers hardness units) to very hard materials (3000 Vickers hardness units).

The great advantage of the Vickers hardness test is that its hardness value has nothing to do with the size of the test force. As long as the material with uniform hardness, the test force can be chosen arbitrarily, and its hardness value is unchanged. This is equivalent to having a uniform scale over a wide range of hardness. This is superior to the Rockwell hardness test.

The Vickers hardness test and Brinell hardness test results will get similar hardness values in the range of medium and low hardness values on the same uniform material.

Vickers hardness test can be as small as 10gF; the indentation is very small, especially suitable for testing small thin materials.

Advantages of Brinell hardness tester:

The advantage of the Brinell hardness test is that its hardness is representative. As a 10mm diameter, spherical indenter with 3000Kg test force is usually used, the indentation area is large, which can reflect the average value of the comprehensive influence of various metal composition phases in a large range, and the surface is not affected by individual composition phases and small inhomogeneity. Therefore, it is especially suitable for determining gray cast iron, bearing alloy, and metal materials with coarse grains. Brinell hardness tester, its test data is stable, reproducibility is good, accuracy is higher than Rockwell, lower than Vickers. In addition, there is a good correspondence between the Brinell hardness and tensile strength values.

The Brinell hardness test has the advantage of being a good hardness representative; the Brinell hardness test is generally used in hard alloy ball head diameter is larger test force can be as high as 3000 kg, the indentation area is larger, can remove metal material pool associated with the composition of the minute differences influence, can reflect the comprehensive performance of polycrystal metal material of average. Therefore, it is especially suitable for determining gray cast iron, annealed steel, Brinell hardness tester-bearing alloy, and other metal materials with coarse grain. The test data has good repeatability, and the result is stable.