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Home > Wear failure related factors of grinding steel ball

Wear failure related factors of grinding steel ball

 

 

Wear and tear - the gradual loss of surface material due to mechanical action. Wear failure due to wear of materials due to the loss of mechanical products. The wear resistance of the steel ball wear in the abrasive loss of more than 50%. The abrasive wear is: into the hard particles between the friction surfaces by external or protrusion on the surface of soft materials on the plough dug many furrows. A wear phenomenon resulting from the migration of materials. The wear mechanism of wear resistant steel ball should be considered from two aspects: the external environment and the intrinsic characteristics of wear resistant steel ball. The external environmental conditions of mechanical wear: hardness, strength, speed, angle, temperature, humidity, particle size, etc...

 

1. Abrasive hardness: in many of the characteristics of wear, the impact of material hardness is the most important.

 

2. The pressure of the material on the abrasive. The wear rate increases with the increase of wear pressure. As the pressure increases, the penetration depth of abrasive wear resistant steel ball increases, and the energy of cutting deformation is enhanced.

 

3. The speed of the mill: for different wear types, wear rate is different. In the case of sliding wear, the effect of velocity is not obvious. Erosion wear rate has an important influence on wear. When the impact speed is high to a certain extent, the original wear or wear at low speed situation does not cause wear material can also cause wear.

 

4. Angle: the impact angle of erosion wear is very big. Impact angle has different effects on brittle and ductile materials. For brittle materials such as ceramics. With the increase of the angle of wear, the wear rate reaches the maximum at the angle of 90 degrees. The results show that brittle materials are not suitable for large angle erosion. For ductile materials, the wear rate increases with the increase of impact angle. At a certain angle, it reaches the maximum value, and then decreases with the increase of impact angle. The results show that the wear resistance of ductile materials is very low. While in high angle can give full play to its wear resistance. This is because the toughness of the material hardness is low, low angle erosion abrasive particles on the surface of the most favorable, the amount of wear is rising. When the material is in the vertical impact, the surface of the material is most likely to be broken. So the maximum wear.

 

5. Temperature: with the increase of temperature with the increase of wear.

 

6. Humidity: in practical engineering, in the case of metal friction pairs. Liquid into the grinding interface, wear can be greatly reduced. However, in the case of abrasive wear, abrasive water into, wear and become serious.

 

7. Grain size: abrasive particle size: the impact on wear initially increased linearly with increasing particle size. When a value is called the critical particle size. The increase in wear becomes slow, or the appearance of no longer increases.