Overview

Powder metallurgy is a process technology for producing metal powders or using metal powders (or mixtures of metal powders and non-metal powders) as raw materials, forming and sintering them to manufacture metal materials, composite materials, and various types of products. Powder metallurgy has similarities with the production of ceramics, both of which belong to powder sintering technology. Therefore, a series of new powder metallurgy technologies can also be used for the preparation of ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a crucial role in the development of new materials.

Powder metallurgy includes powder production and finished products. Among them, powder production is mainly a metallurgical process, which is consistent with the literal meaning. Powder metallurgy products often go far beyond the scope of materials and metallurgy, and are often interdisciplinary technologies (materials and metallurgy, machinery and mechanics, etc.). Especially modern metal powder 3D printing, integrating mechanical engineering CAD、 The integration of reverse engineering technology, layered manufacturing technology, numerical control technology, materials science, and laser technology has made powder metallurgy product technology a modern comprehensive technology that spans more disciplines.

The mixing operation of powder materials is one of the important unit operations in many industries. It has been widely used in industrial production such as chemical, pharmaceutical, food, and building materials. There are various types of mixing equipment in the current market, such as one-dimensional mixer, two-dimensional mixer, three-dimensional mixer, V-shaped mixer, double cone mixer, square cone mixer, screw belt mixer, double helix mixer, etc. The objects served by the above mixers are solid powder granules.

The above various mixers are not suitable for mixing metal powders because metal powders have their own characteristics. Taking aluminum powder as an example, it has the following characteristics: (1) small particle size, with a minimum of 0.5 µ m, making mixing difficult; (2) Aluminum powder is prone to oxidation and discoloration in oxygen, which can alter its physical properties; (3) Aluminum powder is a flammable and explosive substance. When mixed, friction occurs between the material and equipment, as well as between the materials, causing an increase in temperature and making it prone to combustion or explosion in aerobic environments; (4) The mixing amount is large, which means the output is high. This requires an increase in the mixing amount at once, as well as a shorter mixing time and less auxiliary time. Within the same time, the maximum number of mixing batches should be increased.

Scope of application

Tungsten powder, iron powder, silver powder, stainless steel powder, copper lead powder, copper tin powder, copper-clad iron powder, lead tin alloy, copper iron powder, iron tungsten alloy, copper iron powder, iron tungsten alloy, magnesium alloy, aluminum magnesium alloy, copper oxide, tantalum carbide, carbonyl nickel powder, niobium oxide, yttrium oxide, metallic silicon, ferrosilicon, sponge iron, aluminum hydroxide, magnesium oxide, magnesium hydroxide, zinc oxide, precipitated barium sulfate, combustion aid, calcium phosphate, foaming agent, white carbon black, silica gel, strontium carbonate, powder metallurgy mineral powder, metallurgical materials, molybdenum iron powder, etc.