With the rapid development of industrial technology, China''s metallurgical technology has been rapid development, is the most representative of the powder metallurgy technology, it is mixed with metal powder and non-metallic powder, usually adding gasoline, rubber or paraffin increasedthe plasticizer improve formability and plasticity of the powder. Pressed into the desired shape. Powder in the sintering of the powder production process includes the steps of the powder preparation, powder mixing, etc.. Powder under a pressure of 500-600MPa. The need to maintain the high temperature of the atmosphere furnace or a vacuum furnace. Sintering and metal molten, at least one element is still in the solid state. By diffusion between powder particles in its process, a series of physical and chemical processes such as crystallization, welding, compounds, dissolved, competence metallurgical products have a certain porosity. Generally cooked parts can be used directly, but some parts of the higher requirements for size, hardness, wear, which requires post-processing. Post-processing, coining, rolling, extrusion, quenching oil immersion and infiltration. Powder metallurgy technology has been a huge application, roasting products made with it, not only the machining process is simplified, and the precision is very high, the powder metallurgy technology will soon be widely used in industries. |