What is the principle of powder metallurgy

What is the principle of powder metallurgy

Powder metallurgy is a process technology for preparing metal or using metal powder (or mixture of metal powder and non-metallic powder) as raw materials, forming and sintering metal materials, composite materials and various products. Powder metallurgy is similar to ceramic production, so a series of new powder metallurgy technologies can also be used to prepare ceramic materials. Due to the advantages of powder metallurgy technology, it has become the key to solve the problem of new materials and plays an important role in the development of new materials.

(1) Powder metallurgy technology can minimize alloy composition segregation and eliminate coarse and uneven casting structure. It plays an important role in the preparation of high-performance rare earth permanent magnetic materials, rare earth hydrogen storage materials, rare earth luminescent materials, rare earth catalysts, high temperature superconducting materials and new metal materials (such as aluminum lithium alloys, heat resistant aluminum alloys, high temperature alloys, powder corrosion resistant stainless steel, powder high-speed steel, intermetallic compounds high temperature structural materials, etc.).

(2) A series of high-performance non-equilibrium materials can be prepared, such as amorphous, microcrystalline, quasicrystalline, nanocrystalline and supersaturated solid solution. These materials have excellent electrical, magnetic, optical and mechanical properties.

(3) A variety of composite methods can be easily realized, giving full play to the respective characteristics of each constituent material. It is a low-cost technology to produce high-performance metal matrix and ceramic composites.

(4) It can produce materials and products with special structures and properties that cannot be produced by ordinary smelting methods, such as new porous biological materials, porous separation membrane materials, high-performance structural ceramics and functional ceramics.

(5) It can realize networked and automated mass production and effectively reduce production resources and energy consumption.

(6) It can make full use of ore, tailings, steelmaking sludge, steel mill scale and recycled scrap metal as raw materials. It is a new technology that can effectively regenerate and comprehensively utilize materials.

Many of our commonly used processing tools are made with powder metallurgy technology.