1) Properties of abrasives
The hardness, particle size and shape of the abrasive have a great influence on wear. Experiments show that the higher the hardness of rice, the more serious the wear; generally, when the abrasive grain size is 20-200um, the material will wear better.
The wear rate increases with the increase in wear size, but when the abrasive particle size increases to each critical value, the material wear rate is almost unchanged or changes very slowly; polygonal abrasive particles are better than spherical and smooth particles at the same time.
The wear amount is 4 times greater under the conditions. Relatively speaking, the shape of the abrasive has a great impact on ductile materials and has a small impact on brittle materials.
2) Properties of target material
The hardness, toughness and elastic modulus of the target material are the decisive factors that determine whether the material is wear-resistant. Generally speaking, the higher the hardness, the better the toughness, the greater the elastic modulus of the target material, the better the properties of the material.
The better. However, whether the hardness, toughness and elastic modulus of the target material are suitable for a certain working condition does not entirely depend on the material itself, but depends to a large extent on changes in the external environment. This is also
3) The essence and focus of anti-wear.
The obvious difference in the erosion properties of plastic materials and brittle materials is determined by their different erosion mechanisms. For ductile materials such as metals, micro-cutting is the main erosion mechanism; while for brittle materials such as ceramics, micro-cutting is the main erosion mechanism.
For tough materials, crack propagation and cross-generation of brittle fracture are the main erosion mechanisms.
4) Incident speed
Experiments show that speed has a great influence on wear, and the amount of wear is proportional to the cube of speed.
5) Angle of incidence
The incident angle refers to the angle between the trajectories of incident particles on the target surface. When the incident angle is very low, the kinetic energy component of the incident particles in the direction perpendicular to the material surface is not enough to cause damage to the material.
When severely damaged, brittle materials demonstrate the superiority of high hardness and exhibit a lower erosion rate than primary materials. This is why pipes such as elbows, tees, reducers, distributors, etc.
The reason why the wear is more serious than that of straight pipes is that in systems where pipes were used to transport materials for a long time, the erosion wear at the elbows was about 50 times more serious than the wear of the straight pipes.
The impact of the incident angle is related to the type of target material. Plastic materials will suffer greater damage when impacted at an angle of 20°-30°. However, brittle materials suffer greater damage during vertical impact.
Post time: Mar-27-2024