The silicon powder in the diamond segment is a commonly used abrasive material, which mainly acts as a filler. Specifically, silicon powder can fill the gaps between diamond particles, enhance the bonding force and rigidity of diamond particles, thereby improving the hardness and wear resistance of the entire diamond segment. In addition, silicon powder can also play a lubricating role, reduce the friction between diamond particles, and reduce the wear of diamond particles. Therefore, silicon powder is an indispensable part of the diamond segment and plays an important role in improving the quality and performance of the diamond segment.
1. Filling function: Silicon powder is usually used as a filling material in the manufacture of diamond segments to fill the gaps between diamond particles and improve the bonding strength and density between diamond particles. Silicon powder will be mixed with diamond particles during the production process, and sintered under high temperature and high pressure conditions to form a sintered structure of diamond segment. The key to silicon powder filling is to control the amount and uniformity of filling, to ensure that the filling material evenly fills the gaps between diamond particles, so as to make full use of the space of the material and improve the compactness and strength of the product. Insufficient or uneven filling may cause weak bonding between diamond particles, affecting the performance and life of the product.
2. Provide surface energy: Silicon powder has a certain surface energy, which can increase the adsorption force and chemical reaction ability between diamond particles and metal powder, thereby strengthening the bonding force between diamond particles and metal powder. In the actual application process, the stronger the bonding force of the diamond, the diameter affects the holding force of the diamond, and directly affects the cutting efficiency and service life of the diamond segment.
3. Enhanced toughness: Silicon powder can be used as a strengthening agent for steel to increase the toughness and ductility of the metal matrix binder, thereby reducing the cracks and fractures of the diamond segment during use.
4.Increase hardness: Silicon powder acts as a filler during the entire segment manufacturing process, which increases the hardness of the diamond segment itself. In addition, high-temperature sintering of silicon powder can increase the bonding strength of diamond and metal powder, further improving the hardness of the diamond segment. When the silicon powder reacts with the steel substrate at high temperature to form silicon carbide, it can form a hardened layer on the surface of the steel, thereby increasing the hardness of the entire segment.
5. Extend the service life of the diamond segment: During the cutting process, silicon powder can prevent the heat generated during cutting from accumulating on the diamond particles, reducing the thermal expansion of the diamond particles and the occurrence of thermal cracks, thereby improving the wear resistance of the diamond segment, In addition, the hardness of silicon powder is also relatively high, which can play a certain reinforcing role when the diamond segment is worn and prolong the service life of the diamond segment. Usually, according to the content of silicon powder, the life of the diamond segment can be increased by 2%-5%.
6. Increase the lubricity of the diamond segment: Silicon powder does not directly increase the lubricity of the diamond segment, but fills the gap between the diamond particles to reduce the friction between the diamond particles, thereby reducing the friction of the diamond segment. The wear and friction coefficients indirectly improve the lubrication performance of the diamond segment. In addition, silicon powder can also increase the hydrophobicity of the diamond segment, making it easier for the lubricating fluid on the surface of the diamond segment to form a lubricating film, thereby improving the lubrication effect.
The content of silicon powder in diamond segment is generally between 5% and 20%, which may be different in different manufacturing processes and application scenarios. If the content of silicon powder is too much, the bonding force between diamond particles will be too weak, the strength and wear resistance of the diamond segment will decrease, and the lubricating performance of the diamond segment may also be deteriorated. If the silicon powder content is too small, the gaps between the diamond particles cannot be fully filled, and the strength and wear resistance of the diamond segment will also decrease. Therefore, the content of silicon powder needs to be adjusted reasonably according to the specific situation.
