The hammer contains a large number of high - hardness carbides, and its wear resistance, especially the wear resistance of the wear-resistant material is very superior. So it requires it to be hard. But in the wear process, if we only pursue the hardness of materials and ignore the toughness of materials, it will inevitably lead to the reduction of the hammer's function and even premature rupture. The general design idea of hammer is to ensure that the hammer has a certain toughness, and the higher the hardness is, the better the material performance will be.