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Production Introduction

The quality control of the production process is the key to the product quality control. Therefore, testing should be carried out during the production process and after the fact. To ensure product quality, we must strengthen the quality control of the production process. Quality control is the operation techniques and activities taken to achieve quality requirements. Its purpose is to ensure product quality by monitoring the process and eliminating unsatisfactory factors at all stages of quality. Whether it is a component product or a final product, we must pay attention to their quality.

01 First, use high-strength diamond with stable production performance, coarse particles and good thermal stability (ti and tfi are directly close). Diamond tools are basically fixed on the working substrate by diamond and matrix under certain process conditions, and different stone materials are processed mainly by the abrasive and cutting action of diamond. Therefore, the quality, particle size and concentration of the raw material (diamond) play a decisive role in diamond tools.

02 Secondly, add carbon powder element to improve the diamond holding power. In the process of diamond saw blade processing, if the cutter head matrix has a good grip on the diamond, the diamond will have a good edge, will not fall off prematurely, and the cutting will be sharp and efficient. Generally, metal elements, such as plating, titanium, chromium, nickel, tungsten, etc., can be formed by coating the surface of diamond with a layer of strong carbon compound, so as to improve the bonding between diamond and matrix powder, and help prevent diamond from sintering at high temperature. In addition, a small amount of strong carbon powder elements can be added to the matrix powder, such as molybdenum, chromium, tungsten powder, etc. Since this type of powder has good wettability and affinity for diamond and diamond, carbide alloys are formed on the surface of diamond and matrix metal during sintering, which is conducive to the chemical bonding and metallurgical bonding of diamond and matrix metal, thereby greatly improving tire placement. The body's holding power to the diamond.

03 Improve the particle size ratio of diamond. In the traditional ratio, the cutter head should be sharper, and more coarse-grained diamonds should be used, otherwise, fine-grained diamonds should be used. That's true, but it's not always optimal. Due to the high hardness and elastic modulus of diamond, plastic deformation is difficult to occur during high temperature sintering. It is beneficial to improve the wear ratio of the tool by selecting a good ratio and increasing the bulk density of the diamond particles before sintering. After many experiments, it is concluded that the general cutter head is composed of three kinds of diamond particles: coarse, medium-coarse and fine-grained, and the optimal particle size ratio is 1:0.0227:0.071.

04 Use ultrafine powder and pre-alloyed powder. Ultrafine powder is beneficial to reduce the sintering temperature and increase the hardness of the carcass. The pre-alloyed powder, through three-dimensional mixing, greatly shortens the contact time between the powder and the air, prevents the premature loss and segregation of the low-melting point metal, and is beneficial to improve the strength of the sintered product and increase the holding force of the diamond.

05 Add an appropriate amount of rare earth elements (such as rare earth lanthanum, cerium, etc.) to the matrix powder. It can obviously reduce the wear performance of the bonding agent and improve the cutting efficiency of the diamond saw blade.

06 Finally, a cold pressing-hot sintering process is used to sinter in a vacuum protective atmosphere. The cutter head that is sintered after cold pressing is very sharp in the sawing process, and the production efficiency is greatly improved. The vacuum protective atmosphere sintering can prevent powder oxidation and activate sintering, which not only improves the performance of the cutter head, but also prolongs the graphite mold. life and reduce production costs.