How to choose diamond for diamond segment
1: Diamond grit
Diamond grit is also called diamond particle size. Choosing an appropriate grit is the key to ensuring tool performance. The exposure or protrusion height of the diamond on the cutting surface of the diamond segment will affect the cutting depth of each diamond particle. Generally, coarse particles are used for cutting soft materials, while smaller particles are used for cutting tough materials. Therefore, when cutting hard granite, choose diamond with a smaller particle size and higher hardness, and when cutting marble, choosing diamond with a larger particle size and moderate hardness is a better choice.
2: Diamond concentration
The diamond concentration determines the number of diamonds on the cutting surface of the diamond segment. The higher the diamond concentration, the greater the number of diamonds on the surface of the cutting tool, which is beneficial to improve the life. But it is not that the higher the concentration, the better. If the concentration is too high, the surface bonding agent of the segment becomes less, and the structure of the segment becomes weak, which leads to a shorter life. Therefore, to select the appropriate diamond concentration, it is best to find the critical point of the diamond concentration in the segment.
3: Diamond shape
When diamond is under heavy load, the most suitable product is to choose very strong and complete cubic-octahedral diamond. This kind of diamond has the smallest contact surface during the working process and the strongest resistance to breakage, thus reducing equipment power consumption and extending tool life. However, octahedral diamond is not suitable for all. For softer stone, diamond with a weak structure is easier to open, which is convenient for fast cutting.
4: Diamond impurities
Impurities are foreign substances that are wrapped in diamond during growth. The impurities in the diamond not only affect the quality of the diamond during sintering, but also affect the load that the diamond can withstand during cutting. The more diamond impurity in the diamond segment, the more unstable the material will be. On the contrary, the stability of the diamond segment will be higher. Therefore, good diamond segment choose diamonds with less impurities.
5: Impact strength (diamond hardness)
The impact strength is affected by the characteristics of crystal shape, particle size and impurities. When selecting diamond, it is necessary to comprehensively consider the design of the tool, the performance of the bond, the performance of the workpiece material, the power of the machine, the required cutting efficiency and the life, etc. to select the diamond with the appropriate impact strength. The hardness of the diamond in the diamond segment is the core part of the cutting material. The diamond with insufficient strength will be crushed when it is hard and lose the ability to cut. On the contrary, the segment with too hard and not easy to break is easy to be ground. On the contrary, it can not play the role of cutting and grinding stone, which causes the segment to become blunt and increase energy consumption.
Therefore, the selection of diamond in the diamond segment is very particular, and it needs to be determined according to the hardness, wear resistance, and density of the cutting object.