Powder Metallurgy Molding Technology

Powder metallurgy is a processing method that prepares metal powder and makes products from metal powder or a mixture of metal powder and non-metal powder through processes such as shaping and sintering. It can not only prepare special materials that are difficult to prepare by ordinary smelting methods, but also manufacture various products. A kind of precision mechanical parts, saving labor and materials. However, the cost of molds and metal powder is high, and it should not be used when the batch size is small or the size of the product is too large. Compared with traditional material processes, powder metallurgy materials and processes have the following characteristics:
Powder metallurgy is a processing method that prepares metal powder and makes products from metal powder or a mixture of metal powder and non-metal powder through processes such as shaping and sintering. It can not only prepare special materials that are difficult to prepare by ordinary smelting methods, but also manufacture various products. A kind of precision mechanical parts, saving labor and materials. However, the cost of molds and metal powder is high, and it should not be used when the batch size is small or the size of the product is too large. Compared with traditional material processes, powder metallurgy materials and processes have the following characteristics:

1. The powder metallurgy process is carried out at a melting point lower than the base metal, so it can obtain multi-phase heterogeneous special functional composite materials and products such as a variety of metals, metals and ceramics, metals and plastics with widely different melting points and densities. .
2. Improve material performance. Fine metal or alloy powder prepared by a special method has extremely fast solidification speed and fine and uniform grains, ensuring a uniform structure of the material, stable performance, and good cold and hot processing properties, and the powder particles are not affected by alloy elements and content Limitation, the reinforcing phase content can be increased, thereby developing new material systems.
3. Using various forming processes, powder raw materials can be directly formed into blanks or net-shape parts with little or no margin, greatly reducing the amount of machining. Improve material utilization and reduce costs.
   Powder metallurgy is an advanced metal forming technology. It is a high-tech technology in which metal and other powders are processed into mechanical parts and metal products through processing, pressing, sintering and necessary subsequent processing. Due to its many advantages such as energy saving, material saving, high efficiency, and environmental protection, it has been widely used and has great market potential and development prospects. In recent years, the powder metallurgy industry has developed rapidly, especially the rapid development of the automotive industry, machinery manufacturing, metal industry, aerospace, instrumentation, hardware tools, engineering machinery, electronic appliances and high-tech industries, etc., which has brought great changes to the powder metallurgy industry. Rare development opportunities and huge market space. At the same time, higher requirements have been put forward for the technical level of the industry. Looking at the current status of international new material research and development, major Western industrialized countries are concentrating manpower and material resources to seek breakthroughs. The United States, the European Community, Japan and South Korea have all included new materials and their preparation in their latest national science and technology plans. The technology has been listed as one of the national key technologies and will receive key support. As China joins the WTO and the global economic integration process continues to accelerate, the powder metallurgy industry is facing new challenges. my country’s powder metallurgy industry must accelerate its development in order to remain invincible in the fierce market competition.
   The future development directions of powder metallurgy materials and products are mainly as follows: representative iron-based alloys will develop into large-volume precision products and high-quality structural parts; manufacturing of uniform microstructure, difficult to process and completely dense High-performance alloys; using enhanced densification processes to create special alloys that generally contain mixed phase compositions; manufacturing non-homogeneous materials, amorphous, microcrystalline or metastable alloys; processing composite parts with unique and unusual shapes or compositions .