Which material is wear-resistant for the hammer head of the pebble sand machine? The reason affecting the service life of the hammer of the pebble sand machine, among which the material of the hammer is an important factor.
At present, high chromium cast iron is recognized as the wear-resistant hammer material. High chromium alloy hammer head has high hardness and is a good wear-resistant material. It has been widely used in sand punching machine and hammer crusher. The hardness of high chromium cast iron after heat treatment can reach more than 58HRC, the matrix is martensite with high hardness, and the structure contains a large amount of high hardness carbide M7C3, which is considered as an ideal wear-resistant material for the hammer of sand punching machine. The structure and properties of the wear-resistant hammer mainly depend on the content of chromium, carbon and manganese. Because the affinity of carbon and chromium is greater than that of iron and carbon, a series of stable ferrochrome compounds are formed.
Compared with high manganese steel hammerheads, high chromium hammerheads have higher hardness and better wear resistance, and have been widely used. Due to hammer are relatively high, the content of chromium and carbon in chromium carbide network form and grain boundary elements, causing a lot of continuous distribution of eutectic carbides in the grain boundary and matrix for twin martensite structure, distributed the continuous on the grain boundary in hard brittle matrix of brittleness of the carbide network organization structure of the hammer toughness reserve is insufficient, affect its application ranges.
How to improve the toughness of high chromium hammer has become an important problem for crusher hammer manufacturers. As a wear-resistant material, high hardness must be required. However, in the process of wear and tear only the pursuit of material hardness and neglect of material toughness, will inevitably lead to the use of hammer in the process of peeling effectiveness, even premature fracture phenomenon.
The impact toughness of high chromium cast iron is poor, leading to the hammer is prone to fracture, Our company will make high chromium cast iron composite hammer head, and add alloy, hammer handle with good impact toughness cast steel manganese steel material, this double liquid bimetal composite hammer play the advantages of high chromium cast iron hardness and good wear resistance, It also makes up for the shortcoming that the integral high chromium cast hammer head is easy to break at the position of the hammer handle, and can save Ni, Mo and other precious metal elements
