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DIAMOND SEGMENT
Detailed description of diamond segment manufacturing
Publish Date:2020-12-29
In the manufacturing process of diamond segment, the selection of the raw material of the diamond segment matrix and the sintering process are two critical factors. Cobalt bond, iron bond, copper bond alloys and other metals are often selected as raw materials for the matrix, but they are subject to manufacturing costs and mechanical constraints on processing. After extensive testing and testing, the iron-nickel-copper-tungsten alloy is the most cost-effective choice of modern metal bond as the matrix material of the diamond segment.The manufacturing process of diamond saw blade segment is to sinter metal powder and diamond particles through high temperature and high pressure. It is a powder metallurgy process: the mixed metal powder is at high temperature (800-1000°C) and high pressure (180-25OKg). /cm2), through a series of physical and chemical reactions such as diffusion, welding, compounding, and recrystallization, the metal powder particles form a sintered body with a fixed shape and a hard structure. This is the production process of the cutter head.
The saw blade segment has the following requirements for the matrix bond, not all metals can meet the requirements:
1. The diamond segment should have good bonding and ultra-high hardness. The bonding with diamond is used to ensure the formation of a good protective structure for the impregnated diamond and prevent it from falling off. The ultra-high hardness is determined by its wear resistance. Generally speaking, the hardness and wear resistance of the matrix should match the efficiency of cutting the stone.
2. The entire sintering process can be completed at a lower sintering temperature (generally not more than 950°C) and a short holding time (5 minutes). Sintering at this temperature can ensure that the diamond carbonization is not excessive. If the blade is over-carbonized, the segment will less sharpness and fail to cut, and the structure of the segment is not strong due to excessive carbonization.
3. The matrix bond can achieve chemical mutual solubility by adding some rare elements. For example, Fe-Ni, Cu-Ni can achieve complete mutual solubility, and WCIW-Ni, WC-Cu, Fe-Cu can achieve limited mutual solubility and can produce strengthening matrix, so adding some trace metal elements can better combine the matrix with the diamond.
4. Fe, Ni group VIII elements have a brilliant affinity for diamond. Taking advantage of iron and nickel elements, it can make the diamond on the segment not easy to peel off.
After sintering, the diamond segment will become a finished product. It can be used on various blade body. For example, welded to the saw blade body to form a diamond saw blade, welded to a metal grinding disc to form a stone abrasive. It can also be placed on calibrating wheels, CNC tools, drill bits and other places. Finally, finished products with different functions are made by polishing and painting, which will be widely used in cutting, grinding, drilling and other processes in stone, concrete, ceramic tiles and other industries.
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