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国产HB-2型锤击式布氏硬度计广泛用于退火、正火及调质处理等大型工件的硬度测定,具有携带方便、操作灵活等特点。但是,在操作时,由于不易握正,难以使硬度计的轴线垂直于工件的表面,造成试验误差加大,有时,其误差可达±7～10％。所以,其试验数据不能作为成品验收的依据。为在锤击压痕时,能确保硬度计轴线与被测试面的相互垂直,从而提高
Domestic HB-2 Hammer-type Brinell hardness tester widely used in annealing, normalizing and quenching and tempering and other large parts of the hardness determination, with easy to carry, flexible operation and so on. However, during operation, it is difficult to make the axis of the durometer perpendicular to the surface of the workpiece due to the difficulty of gripping. As a result, the test error may increase, and the error may reach ± 7 to 10% in some cases. Therefore, the test data can not be used as the basis for acceptance of finished products. In the hammer indentation, to ensure that the durometer axis and the test surface perpendicular to each other, thereby enhancing