Factors Causing Damage To High Pressure MillDate:2018-11-29

Summary:What factors can cause damage to the fuselage of the high pressure mill?Summary of contents: In the process of operation, the machine will inevitably suffer som

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What factors can cause damage to the fuselage of the high pressure mill?

Summary of contents: In the process of operation, the machine will inevitably suffer some damage, as is the high-pressure mill. The factors that cause damage to the high-pressure mill mainly include the influence of abrasive hardness on the wear rate of the material, the shape and size of the abrasive, and the mechanical properties of the material. We all know that the machine will inevitably suffer some damage during the operation, as is the high-pressure mill. The main factors that cause damage to the high-pressure mill are as follows:

1, the impact of abrasive hardness

Abrasive hardness has a significant effect on the wear rate of the material. The extent of this effect is primarily a function of the ratio of the hardness of the material to the hardness of the abrasive. As the ratio changes, the material wear mechanism changes.

2, the impact of abrasive shape size

The abrasive shape (sharpness) also has a significant effect on the wear of the high pressure mill. For example, the newly broken quartz sand is more violent to the material than the river sand. Since the shapes of various abrasives are difficult to measure and quantitatively distinguish, the abrasives are generally only qualitatively classified into three types: sharp, polygonal, and round and blunt. Under the same hardness condition, the sharp abrasive has severe damage to the material, and the wear mechanism is mainly micro-cutting; the polygon wears the material second, the wear mechanism is micro-cutting plus furrow; the round-shaped abrasive fork is second. The wear mechanism is dominated by plowing. The size of the abrasive has a certain influence on the wear. When the abrasive is below a certain critical size, the volume wear is sharply proportionally increased by the increase of the size of the wearer; when the critical dimension is exceeded, the increase of the wear is significantly reduced.

3. Influence of mechanical properties of materials

The mechanical properties of materials affecting the wear of high-pressure mills are: elastic modulus, macro hardness and surface hardness, strength, ductility and fracture toughness. The tolerance of industrial pure metals is directly proportional to its modulus of elasticity. However, this relationship does not apply to heat-treated steel, although heat treatment does not change the elastic modulus of the material, but it will greatly improve its wear resistance. In contrast, the relative wear resistance of industrial pure metals and different types of steel is directly proportional to its macroscopic hardness. The relative wear resistance of the steel before and after the heat treatment is determined to be its macro hardness, but the slope of the wear resistance varies with the increase of its macro hardness. The wear resistance depends not only on the hardness of the steel, but also on the composition of the crucible. Although the steels of different compositions have the same hardness after heat treatment, their wear resistance is different, which indicates the wear resistance of various steels and their macro hardness. There is no single value correspondence between them.

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