Tungsten Copper Process — Deformation Processing (1/2)

Tungsten copper product is commonly fabricated by powder metallurgy (PM) and infiltration. Due to the large difference of hardness and melting point of tungsten (W) and copper (Cu) and completely immiscible, it is also known as two-phase psudoalloy. Through its incorporation of tungsten powder or after forming part of a mixed copper powder special suppress internal communication pore tungsten skeleton, tungsten copper alloy is further formed by copper infiltration process with relatively high density, the excellent properties. At present, there have been superfine nano-crystalline tungsten-copper alloy, the microscopic structure is more reasonable and stable, relative density and intensity has also increased significantly, but its plasticity and ductility is relatively low, can not meet the particular requirements of some products (such as sheet, for wire, foil, etc.), and therefore the study of the deformation processing of tungsten copper alloy material has also become a hot topic.

For the deformation processing of tungsten copper material, we can specifically divide it into two types, one is cold deformation processing, another is heat deformation processing. From the definition, cold deformation processing is a kind of plastic deformation processing under recrystallization temperature. With the development of the core technology of mechanical processing industry, the production of more and more molded parts are manufactured by cold mold, types of cold deformation of the mold used more. Volume cold forging (cold heading, cold extrusion, stamping, etc.); sheet metal stamping (such as drawing, blanking, cutting, punching, etc.); material rolling (cold rolling wheel molding, etc.). Although many types of cold deformation of the mold, different working conditions, performance requirements are different, but the basic work in close: that was so in the cold state of the metal deformation, withstand greater shear force at work, pressure, bending force, impact and friction.