In terms of jaw plate material selection, the key to wear resistance performance depends on the balance between hardness and toughness of the material. ① When the material hardness is too high, the depth of material compression becomes shallow, and the amount of deformation decreases, resulting in a reduced short-range slip and cutting effect between materials. ② On the other hand, materials with excellent toughness can significantly improve fracture resistance, effectively avoiding brittle fracture during compression and impact processes, while also enhancing the ability to resist fatigue deformation and cracking. Duma Machinery, an expert in china jaw crusher spare parts, points out that these two performance indicators often conflict with each other, and achieving the optimal balance becomes a technical challenge in the industry.
For different specifications of crusher jaw plate casting, it is necessary to choose the appropriate material based on the actual working conditions. Jaw crushers face different feed sizes and sharpness (with varying shapes) due to differences in dimensions and specifications, resulting in significant differences in the compression and impact forces experienced by the jaw plate. For medium and large equipment, in addition to resisting material compression and shearing, the impact force and bending stress should also be given special consideration. Therefore, large equipment generally uses Mn13Cr2 modified high-manganese steel as the jaw plate material.
In terms of jaw plate material research and development, an ideal material should have both high hardness (resisting compression and micro-chisel damage) and sufficient toughness (preventing edge chipping and impact fatigue). Additionally, optimizing the design of the jaw plate structure can effectively reduce relative sliding, which not only enhances the equipment's productivity but also significantly extends the lifespan of china jaw crusher spare parts.
Currently, small crusher jaw plate castings mainly use high-manganese steel, with low-alloy cast iron being rarely applied. The latter suffers from insufficient toughness, making it prone to fracture. However, practical experience shows that small equipment, due to insufficient impact force, cannot fully activate the quenching characteristics of high-manganese steel, causing its excellent wear resistance to not fully manifest. As a result, the jaw plate's lifespan typically only lasts for 200-400 hours, leading to significant waste of high-manganese steel resources. Therefore, the development of new jaw plate material to extend the service life and reduce material consumption has become an important research direction in the field of crusher jaw plate casting.
