Hammerhead's life but also with the technical parameters of the crusher, of which the most important is the power and speed of the rotor body. These two parameters directly reflects the hammer line speed and impact, they are not only related to the production capacity of crusher is also related to the degree of hardening of the impact hammer. Good hardening impact hammer, life is bound to be extended. Rotor speed is too low, not only low production capacity, and the kinetic energy is low, resulting in adverse impact hammer hardening, poor wear resistance; the rotor speed is too high, although can get a better impact hammer hardening equipment to improve productivity. But will also cause the hammer, grate and liner wear strong, life is also unfavorable for the hammer, and it will significantly increase the power consumption. Therefore, we should determine a reasonable speed to increase the impact of the initial work hardening of the hammer, hammer reduce wear. Different structures and geometries hammer, the mechanical properties of the heat treatment, the internal microstructure is very different, and thus have a greater impact on the wear resistance, especially the thickness, size large hammer impact is more prominent . Heavy hammer the more, the more difficult hardenability, its wear resistance also worse. Due to the internal hammer wear resistance was significantly lower than the surface, therefore, for greater thickness hammer, only by means of rational casting and heat treatment: [art to improve the situation, but the means to improve the hammer wear resistance is limited, the best way is to not change the kinetic energy of the hammer blow of the situation and the strength of the hammerhead structure to optimize the design, one can improve the utilization of the hammer, on the other hand can be reduced affect the structural properties of heat, avoid the wear resistance of the hammer fell. 

keywords: Hammer, hammer manufacturers, wearable hammerhead,