How to make a diamond saw blade sharper?

Selection of diamond particle size When the diamond particle size is coarse and single particle size, the saw blade head is sharp and the sawing efficiency is reduced, but the bending strength of diamond agglomeration decreases; when the diamond particle size is fine or coarse and fine particle size is mixed, the durability of the saw blade head , but less efficient.

Considering the above factors, it is more appropriate to choose the diamond particle size as 50/60 mesh.

1. The choice of diamond distribution concentration is within a certain range. When the diamond concentration changes from low to low, the sharpness and sawing efficiency of the saw blade gradually decrease, and the service life is gradually extended; but the saw blade will become dull if the concentration is too high. However, with low concentration and coarse particle size, the efficiency will be improved. Taking advantage of the different functions of the various parts of the cutter head during sawing, different concentrations are used (that is, the middle layer can use a lower concentration in a three-layer or multi-layer structure), and the cutter head forms an intermediate groove during the sawing process. It is beneficial to prevent the saw blade from swaying, thereby improving the quality of stone processing.

2. Selection of diamond strength Diamond strength is an important indicator to ensure cutting performance. Excessive strength will make the crystal not easy to be broken, the abrasive grains will be polished during use, and the sharpness will be reduced, resulting in the deterioration of tool performance; when the diamond strength is not enough, it will be easily broken after being impacted, and it is difficult to bear the heavy responsibility of cutting. Therefore, the strength should be selected at 130~140N.

3. The choice of the binder phase The performance of the saw blade does not only depend on the diamond, but on the overall performance of the composite material of the cutter head formed by the proper coordination of the diamond and the binder. For soft stones such as marble, the mechanical properties of the cutter head are required to be relatively low, and copper-based binders can be used. However, the copper-based binder has low sintering temperature, low strength and hardness, high toughness, and low bonding strength with diamond. When adding tungsten carbide (WC), use WC or W2C as the skeleton metal, with an appropriate amount of cobalt to improve the strength, hardness and bonding characteristics, and add a small amount of metals such as Cu, Sn, Zn, etc. with low melting point and low hardness for bonding Mutually. The particle size of the main additive component should be finer than 200 mesh, and the particle size of the additive component should be finer than 300 mesh.

4. The selection of sintering process As the temperature increases, the densification degree of the matrix increases, and the flexural strength also increases, and with the extension of the holding time, the flexural strength of the blank matrix and diamond agglomerates increases first and then To reduce, the sintering process at 800℃ for 120s can be selected to meet the performance requirements.