The powder metallurgy mold is obtained by using metal powder as a raw material and undergoing processes such as forming and sintering. The technology used is powder metallurgy technology. Because this technology has the advantages of small material consumption, good performance, good product quality and stability, and can achieve energy saving, it is widely used in transportation, machinery, electronics, aerospace, biological and energy industries, and It is suitable for mass production to improve work efficiency and product output.
Production process of powder metallurgy mold
Production of powder: The production of powder includes the steps of powder preparation, powder mixing and the like. If it is desired to improve and improve the formability and plasticity of the powder, it is also possible to add an appropriate amount of oil, rubber or paraffin as a plasticizer.
Press forming: Generally, pressing a suitable pressure in the pressure range of 15-600 MPa is pressed and pressed into a desired shape.
Sintering: Generally carried out in a high temperature furnace with a protective gas or in a vacuum environment, such as a vacuum furnace. Also, it is not the same as metal melting because at least one element of the material is in a solid state during the sintering process. Moreover, during the sintering process, the powder particles are a series of physical and chemical processes such as diffusion, recrystallization, fusion welding, compounding and dissolution.
Post-treatment: This step is carried out under conditions of high performance requirements, such as high hardness requirements, good wear resistance, and high dimensional requirements. In the types of post-treatment steps, there are fine pressure, rolling, extrusion, quenching, oil immersion and infiltration.