In the process of cutting, diamond blades will withstand many alternating loads, such as the pressure of cutting, centrifugal force, and cutting heat. These force effects and temperature effects will cause the wear of the blades.

1. Force Effects

The force effects on blades should be axial and tangential, which can cause the deformations of blades. These deformations will then lead to the non-straight cutting section, wastes of stone materials, bigger noises, increased vibrations, and the early wear and shorter life of the blades.

2. Temperature Effects

The traditional theory thinks that the temperature effects on diamond blades are mainly shown in two ways: one is leading to the graphitization of the diamonds in the blades’ segments; the other is causing the thermal stress between the diamonds and the bond, and then leading to the diamond particles to fall off early.

However, new researches show that the heat generated in the cutting process is mainly conducted into the blade’s segments, and the temperature of the segments’ bodies is not high, generally between 40 to 120°C, but the temperature of the grinding points of diamonds is fairly high, generally between 250 to 700°C. The coolant can reduce the average temperature of the segment’s body, but has no much help to the temperature of diamonds. Though this temperature normally will not lead to the graphitization of the diamonds, it will change the friction performance between the diamonds and the material being processed, and will lead to the thermal stress between the diamonds and the bond, and then the working mechanism of diamonds will be changed fundamentally.

The researches show that temperature effects are the biggest factor for the wear of diamond blades.