How to improve the quality of high quality diamond saw blade efficiently

- Dec 17, 2019-

How to improve the quality of high quality diamond saw blade efficiently




With the development of decorative materials market, the demand for stone materials is greatly increased. In stone processing, the demand for diamond tools is also growing. However, the quality of diamond saw blade in Yunfu market is not ideal. It is often very sharp at the beginning. When the diamond is cut to half, the cutting edge is not good and the falling off is serious, or the cutting quantity is small. The cutting efficiency is not high because the cutting head is changed many times in one working hour.


With the development of decorative materials market, the demand for stone materials is greatly increased. In stone processing, the demand for diamond tools is also growing. However, the quality of diamond saw blade in Yunfu market is not ideal. It is often very sharp at the beginning. When the diamond is cut to half, the cutting edge is not good and the falling off is serious, or the cutting quantity is small. The cutting efficiency is not high because the cutting head is changed many times in one working hour.




Stone enterprises urgently need diamond saw blade with high efficiency, high quality and good cost performance. In view of the current situation, through the practice of maitai saw blade experts for many times, a set of technical scheme for the production of high-efficiency and high-quality diamond saw blade came out.




1. High strength diamond with stable production performance, coarse particles and good thermal stability (TI is close to TFI). Diamond tools are basically fixed on the working matrix by diamond and matrix under certain technological conditions, and different stones are processed mainly by the grinding agent and cutting effect of diamond. Therefore, the quality, granularity and concentration of raw materials (diamond) play a decisive role in diamond tools.




2. Although the strong carbon powder element is added, the diamond holding force is improved. In the process of diamond saw blade processing, if the matrix of the cutter head has a good holding force on the diamond, the diamond will have a good cutting edge and will not fall off prematurely. When cutting, it is sharp and efficient. Generally, a layer of strong carbon compound can be coated on the surface of diamond to form metal elements, such as plating, titanium, chromium, nickel, tungsten, etc., so as to improve the bonding between diamond and matrix powder, and to prevent the oxidation and graphitization of diamond after high temperature sintering; in addition, a small amount of strong carbon powder elements, such as molybdenum, chromium, tungsten powder, etc., can be added to matrix powder. Due to the good wettability and affinity of this kind of powder to gold and corundum, carbide alloy is formed on the surface of diamond and matrix metal during sintering, which is conducive to the chemical bonding and metallurgical combination of diamond and matrix metal, thus greatly improving the control force of matrix to diamond.




3. Improve the particle size ratio of diamond. In the traditional ratio, the cutting head should be sharper, and more coarse-grained diamond should be used, otherwise fine-grained diamond should be used. It is true, but the best work efficiency is not achieved all the time. Because of the high hardness and modulus of elasticity of diamond, it is difficult to produce plastic deformation when sintering at high temperature. It is beneficial to improve the wear ratio by selecting the ratio and increasing the bulk density of diamond particles before sintering. After many experiments, it is found that the optimum ratio of diamond particle size is 1:0.0227:0.071.




Diamond circular saw blade


4. Use ultra-fine powder and pre alloy powder. Superfine powder can reduce sintering temperature and improve the hardness of matrix. The pre alloyed powder can shorten the contact time between powder and air, prevent the premature loss and segregation of low melting point metal, improve the strength of sintered products and increase the holding power of diamond.




5. Add some rare earth elements (such as rare earth lanthanum, cerium, etc.) to the matrix powder. It can obviously reduce the wear performance of bond and improve the cutting efficiency of diamond saw blade.




6. Adopt the process of cold pressing and hot sintering to carry out sintering in vacuum protective atmosphere. The tool head sintered after cold pressing is very sharp in the sawing process, and the production efficiency is improved a lot. However, the vacuum protective atmosphere sintering can prevent powder oxidation and activate sintering, which not only improves the performance of the tool head, but also extends the life of the graphite mold, and also reduces the production cost.




7. The correct welding process, at present, the diamond saw blades are all welded by high-frequency welding machine, which is very easy to cause the second "burn" of the cutting head and the phenomenon of cutting head falling. It is not only unsafe, but also affects the production. Therefore, high strength and good permeability silver solder chips should be used for welding.




Special diamond saw blade


Combining the above points, a high quality and efficient diamond saw blade is developed successfully. But in the process of production and use of diamond circular saw blade, it is necessary to adjust "stone" according to different stone texture and different sawing machines, select and use saw blade reasonably and correctly so as to give full play to the performance of saw blade and obtain good use effect.