About Material of Jaw Crusher’s Toothed Plate

Abrasion of jaw crusher’s toothed plate is a type of gouging abrasion. Take 250*500 jaw crusher’s toothed plate for example; the raw material of its toothed plate is standard high manganese steel which has been processed by water toughening treatment.

Seen in the scanning electronic microscope, the surface of the toothed plate were sags and crests, which were squeezed by the grinding material and finally forms a tongue depressor grinding surface which has lots of wear scar scratched by the sharp corner of the grinding materials.

The main reasons for the abrasion of jaw crusher’s toothed plate is that, the grinding materials which do short-range sliding relative to the toothed plate will cut the metal materials. At the same time, the toothed plate will be squeezed again and again by the grinding materials, which will result in the drop of metal materials.

Hence, the raw material of the toothed plate shall be in good hardness and tenacity. The harder the raw material, the shallower the squeezing depth of the toothed plate is; the cutting abrasion of the materials caused by the short range slid will also be smaller. Good tenacity of the raw material will offer the toothed plate a strong fracture-resistance. It can avoid the brittle rupture in the squeezing and impacting process.

As you know, different model of jaw crusher has different requirement about the feeding size. The extrusion force and impact force of raw materials are also different. Generally speaking, the large and medium jaw crusher will bear bigger force. In addition to the extrusion-pressure-resistance and the cutting action, the impact resistance and the bending stress of the toothed plate shall also be considered. So the big scale toothed plate shall choose material of high tenacity and comprehensive performance.

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