At present, in sintered metal bonded diamond tools, electrolytic copper powder is almost one of the indispensable main raw materials, especially in cutting tools, the quality of which has an important impact on the performance of the tool. Electrolytic copper powder is added to the sintered carcass as a soft conditioning phase, an easy-to-sinter phase, and a cold forming guarantee phase. The structure and mechanical properties of the carcass are mainly the sintered compactness of the carcass, the holding power of diamond, and The wear performance has a direct and important influence, which in turn affects the sharpness and service life of the tool. At present, the quality characteristics of domestic supply of electrolytic copper powder on tool products are mainly reflected in the powder’s structural shape, oxidation resistance and sintering activity, etc., especially whether the powder’s dendritic structure is developed or not. Organization and performance have a huge impact. The quality of electrolytic copper powder not only affects the quality of certain types of tool products, but also has a profound impact on the entire domestic metal bond product industry. Therefore, it is important to understand the influence of the quality characteristics of electrolytic copper powder on the tools to obtain high-quality tool products and ensure the quality stability of the products.
The domestic suppliers of electrolytic copper powder are mainly several large state-owned enterprises, and their products have little difference in terms of oxidation resistance and sintering activity. The main differences are reflected in the powder form (dendritic structure) and particle size distribution. It is precisely the most critical factor that affects sintered products. The production factors of small saw blades are cold press formability and sintering stability, and electrolytic copper powder is the main factor for cold press formability. Its proportion, particle size and form in the formula directly affect production efficiency and quality.
Among the factors that affect the performance of diamond sintered saw blades, the quality of the raw materials is very important, which directly affects the cold press formability of the saw blade and the structural properties of the sintered carcass, and then affects and restricts the performance of the saw blade. The dendritic structure morphology and particle size distribution have important effects on the microstructure and properties of the sintered saw blade carcass, the holding power and cutting performance of diamond; the electrolytic copper powder with a well-developed tree structure is beneficial to increase the density of the sintered saw carcass and its density. The holding power of diamond, thus improving the sharpness and service life of the saw blade.