Muyu Taizhou Powder Metallurgy stated that due to the powder metallurgy method being able to press into final size compacts without or with little need for subsequent mechanical processing, it can greatly save metal and reduce product costs. When using powder metallurgy method to manufacture products, the metal loss is only 1-5%, while when using general casting method to produce, the metal loss may reach 80%. Due to the fact that powder metallurgy process does not melt materials during material production, it is not afraid of impurities brought by crucibles and deoxidizers. Sintering is generally carried out in a vacuum and reducing atmosphere, and is not afraid of oxidation or any pollution to the material. Therefore, it is possible to produce high-purity materials.
Powder metallurgy method can ensure the correctness and uniformity of material composition ratio. Powder metallurgy is suitable for producing a large number of products of the same shape, especially products with high processing costs such as gears. Manufacturing using powder metallurgy can greatly reduce production costs.
The basic process of powder metallurgy process is the preparation of raw material powder. The current powder metallurgy methods in Muyu Taizhou can be roughly divided into two categories: mechanical method and physicochemical method. The mechanical method can be divided into: mechanical crushing and atomization method; Physical and chemical methods are further divided into electrochemical corrosion method, reduction method, chemical method, reduction chemical method, vapor deposition method, liquid deposition method, and electrolysis method. The most widely used methods are reduction, atomization, and electrolysis. The powder is formed into the desired shape of the billet. The purpose of forming is to produce a compact of a certain shape and size, and to make it have a certain density and strength. The forming methods are basically divided into pressure forming and non pressure forming. The most commonly used method in pressure forming is molding. Sintering of billets. Sintering is a critical process in powder metallurgy processes. The formed compacts are sintered to achieve the required final physical and mechanical properties. Sintering can be divided into unit system sintering and multi system sintering. For solid-phase sintering of unit and multiple systems, the sintering temperature is lower than the melting point of the metals and alloys used; For liquid phase sintering of multicomponent systems, the sintering temperature is generally lower than the melting point of the refractory component, but higher than the melting point of the fusible component. In addition to ordinary sintering, there are also special sintering processes such as loose pack sintering, melt immersion method, and hot pressing method.