Powder Metal Parts
Powder metallurgy is used to produce complex-shaped parts with profiles and intricate designs. The process of powder metallurgy is basically used to improve various machine parts and tools by making them stronger, more durable, and sometimes adding options that wouldn’t be possible without it. These components are used in many automotive applications, medical applications, and the aircraft industry, etc. Typical powder metal parts are items such as: cemented carbide inserts that are used extensively in machining operations, metal filters, blocks, ceramic insulators, light bulb filaments, fuel pump cams, refractory nozzles, gear pumps, brake linings, crucibles, isotropic graphite, special chemical application tubes, ferrites, permanent magnets, and pre-forms, etc.
Powder metallurgy is a process that consists of three steps that are designed to make machine parts and tools that are much superior to those that are made by other means, such as by liquefying and metal casting. The process can often be done at a lower cost than other metal part creation methods.
The first step of the process is to powder the metal which is done by grinding a solid metal object into powder. The micro parts of the metal are then placed into a mold. The next second step is to put the powder into a mold or through a die. This creates a weak cohesion and keeps the powder together in its desired shape through cold welding. The last step in the process is to heat the powder until it fuses together without it melting, using compression.
Sintered products have an excellent finish and very close tolerances and they do not need subsequent machining. Based on the type of powder that is used, they may have self-lubricating properties. This is a high volume production process and high part-to-part repeatability is ensured with good methods, the correct powder compacting and heat treatment techniques.
In powder metallurgy you can also make stronger products by combining the materials into one, as many kinds of metals can be fused together. Various types of tools and metal parts can be made to be self-lubricating if you place oil into the mix during the compression process. These parts often possess self-dampening features that make them operate quieter in the machinery.
Large scale magnet manufacturing is a very important process. Carbide inserts have totally revolutionized the metal cutting, mining and rock-drilling industries. These inserts are manufactured using the powder metallurgy process. Special cams with complex contours are required to set the timing in fuel pumps. Powder metallurgy is the most economical process that meets the required dimensions.