What is the cause of abrasive wear in surface grinding?

Shenzhen Hyde tells you the main factors affecting abrasive wear in grinding.

1. Effect of abrasive particle size on wear.

The wear amount of metal increases with the increase of abrasive particle size, and the wear rate remains unchanged when the abrasive particle size increases to a certain size.

2. The influence of abrasive geometry on wear.

Abrasives with sharp edges and corners have higher wear speed than smooth abrasives. After the abrasive is passivated, the wear speed decreases, and if the abrasive is ground, the grinding speed will increase again.

3. The influence of abrasive hardness on wear.

Therefore, the hardness of parts can reach or exceed the hardness of abrasives through surface strengthening, thus improving the wear resistance of parts. However, materials with high hardness will lead to a decrease in toughness and an increase in brittleness.

When the hardness of (1) abrasive is lower than that of parts, the wear amount is related to the hardness difference between them, and the wear speed decreases with the increase of hardness difference.

(2) When the hardness of the abrasive is slightly higher than the hardness of the parts, the wear is serious, and the hardness difference between them is reduced, and the wear is reduced.

Therefore, the hardness of parts can reach or exceed the hardness of abrasives through surface strengthening, thus improving the wear resistance of parts. However, materials with high hardness will lead to a decrease in toughness and an increase in brittleness.

4. Influence of pressure on wear

For abrasive wear, the wear rate is proportional to the pressure. For parts made of the same material, the pressure is reduced by half and the service life is doubled.

(d) Measures to reduce wear and tear

1. Reduce the entrance of abrasive.

If all kinds of filters are equipped, dust-proof sealing devices are added, magnets, chip collection chambers and oil pollution indicators are installed, and air, fuel and engine oil filtering devices are often cleaned and replaced.

2. Enhance the wear resistance of parts

Heat treatment and surface treatment are used to improve the properties of parts materials, improve the surface hardness, and make the surface hardness exceed the hardness of abrasives as much as possible.

3. Choose materials with good wear resistance.

Martensite steel can be obtained by quenching parts with medium carbon steel and tempering at low temperature, which can make parts have wear resistance and good toughness at the same time.