Metal sintering

industrial

There are different ways of obtaining mechanical parts such as forging, machining, casting, welding, stamping, etc. Among the existing manufacturing processes, powder metallurgy, also called sintering, has real advantages. Indeed, sintering allows to produce parts in alloys specifically adapted to their applications and in a more economical way. At Poral, the raw materials are prepared either by mixing different components (iron, graphite, copper, etc.) or by purchasing premixes supplied by our European partners. Since the characteristics of the powders have an impact on the quality of the sintered parts, we check that all our raw materials meet our requirements in terms of composition, grain size, density and flow ability. The density, thermal cycle and composition are defined according to the characteristics and design of the desired products. Once the powders are qualified, we start the first step of our process: compression. During this operation, the powdered material is introduced by gravity into a tool whose axis is arranged vertically on mechanical or hydraulic presses. In order to agglomerate the metal powder, it is subjected to pressures of several hundred MPa. The part obtains a mechanical resistance sufficient to be handled with some precautions. Our tooling workshop is equipped with wire EDM or sinker EDM machines allows the production of complex shaped or high precision toothed tools. Complemented by machining centres, grinding, honing and 3D control machines, this workshop creates compression, calibration and control tools designed by Poral's design office to obtain parts according to customer specifications.