Metal powder and characteristics commonly used in diamond tools
According to the different uses, varieties and production processes of diamond tools, different powders such as metals, non-metals, alloys, compounds, etc. are required. Let us introduce in detail the common metal powders and characteristics of diamond tools:
1. Copper powder: The electrolytic copper powder has good moldability and is widely used for sintering after cold pressing.
2. Iron powder: There are reduced iron powder, electrolytic iron powder and carbonyl iron powder. As a binder material, iron powder has the advantages of low price, good wettability with diamond, and good compatibility with framework materials.
钴 3. Cobalt powder: It is irregular sponge and is a binder material. Its advantages are: good moldability and sinterability; it can increase the bending strength of the carcass; it has a large bonding force with diamond and good wettability.
4. Nickel powder: irregular dendritic, prepared by electrolytic method. Suitable for making tools acting under heavy load, good strength and toughness; reducing sintering loss of iron-copper-based carcass.
5. Tin powder: The particles are in the form of drops, off-white powder, easily oxidized, yellow after oxidation, and prepared by atomization method. The role is to improve the sinterability of the carcass (lower the melting point); it is easy to form intermetallic compounds, which can improve the wear performance and deformability.
6. Tungsten powder: cyan black, micron powder, increase the wear resistance of the carcass and reduce deformation.
7. Tungsten carbide: black, no mechanical inclusions, porous sponge-like, prepared by reduction method. Tungsten and tungsten carbide are mainly added to the carcass as a skeleton material to improve the abrasion resistance of the carcass. If the content is too high, the brittleness of the carcass will increase.