Most crushers are mainly for crushing hard materials, so the choice of equipment materials is particularly important. This article uses the impact crusher as an example to explain the selection of equipment materials.

Impact crusher is a new type of crushing equipment with small volume, large production capacity, large crushing ratio, uniform product particle size, and can selectively carry out crushing operations. During the working of the impact crusher, the hammer and impact plate of the hammer are particularly prone to wear and need to be replaced frequently.

At the beginning of work, when the surface shape of the hammer head is changed, it is mainly subject to impact wear. The material strikes the metal surface with a positive force to produce plastic deformation and impact pits. Therefore, the hammer head material must be carefully selected. The wear resistance of a material is a comprehensive factor index, which is mainly closely related to its hardness and toughness.

Hardness is an important condition for ensuring the wear resistance of the hammer head. The hardness ratio of materials and materials has a great influence on the wear rate. When the ratio is between 0.7-1.3, the wear rate starts to rise and the wear resistance decreases. If the hardness of the material does not change, you can try to increase the hardness of the material to significantly increase its abrasion resistance;

Increasing the hardness of the material blindly does not necessarily improve the wear resistance. Long-term production practice has proven that the wear resistance of hammer heads with the same material hardness and different impact toughness increases with the impact toughness value. Therefore, toughness has a non-negligible effect on improving the wear resistance of the material, and it is a sign that the material itself absorbs external energy.

Due to the importance of material selection, if you want to improve the abrasion resistance of the hammer head and the impact plate, you should observe the following principles when selecting the material: First, in order to reduce the phenomenon that the material is off the metal surface, the hardness of the hammer head material must be increased Second, in order to suppress the initiation and expansion of cracks in the hammer head and reduce the formation of fatigue spalling, we must pay attention to improving the toughness of the material.

Through repeated experimental research, the high-chromium alloy cast iron impact crusher was used to solve the wear problem. This material has the characteristics of high alloy content, good fluidity, large shrinkage, and poor thermal conductivity. Therefore, when designing its casting molding process, the principle of sequential solidification is adopted, and in order to enhance the effect of the riser on the casting, the impact hammer, The thick and large castings such as the impact plate are cast by the vertical pouring rain-type insulation riser.

Since the use of this wear-resistant material, not only reduces the wear of the equipment hammer head and the impact plate, but also effectively extends the equipment life.