What are the raw materials for powder metallurgy process
Powder metallurgy structural parts are very common in the fields of automobiles, motorcycles and mechanical equipment, and even the small gears of notebooks are made by powder metallurgy process. It can be seen that powder metallurgy technology has penetrated into many aspects of our lives, bringing us great convenience.
So what are the raw materials used to produce powder metallurgy structural parts:
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Powder metallurgy high-temperature materials
Powder metallurgy superalloys, refractory metals and alloys, metal ceramics, dispersion-strengthened and fiber-reinforced materials, etc. They are used to manufacture turbine disks, nozzles, blades and other high-temperature parts.
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Powder metallurgy electrical materials
In electrical materials and electrical materials, there are powder metallurgy materials made of precious metals such as gold, silver and platinum, as well as powder metallurgy materials made of silver and copper as the matrix, with tungsten, nickel, iron, tungsten carbide and graphite. Powder metallurgy materials such as tungsten copper, tungsten nickel copper, etc. They are used as electrodes; metal-graphite powder metallurgy materials are used as brushes;
powder metallurgy materials such as molybdenum, tantalum and tungsten are used as electric heating alloys and thermocouples.
Many applications of ceramic are dependent on the electrical insulation, at this point the MIM products has proven to be fully effective. Alumina low conductivity, applications in microelectronics and computer has a long history, is a good material applied to high performance of insulators. Silica is also suitable for used as electrical insulators, but a mixture of alumina and silica material is the combination of the lowest cost. molding. MIM dielectric constant of alumina ceramic body (8-10F / m), and other process routes difficult to distinguish in nature, such as tape casting, slip casting or molding. At up to 700 degrees Celsius, resistance can still be maintained. In 1kHz, MIM dielectric constant of alumina greenhouse 9.8F / m, the loss tangent is negative quartic 10 or smaller, the performance can be maintained to 1MHz. When add the silicon oxide, insulation will decrease slightly.
MIM metal electrical applications of the products is by its resistivity (conductivity) from bottom to characterization. Residual holes and impurities will reduce the conductivity, but high temperature related to sintering process can remove reduce the conductivity of the impurities. It is important to note that the resistance of the ceramic products is high. In some studies, for the powder injection molding manufacturing electrical excitation ceramic device, especially piezoelectric carbonate. A suggestion of application is submarine underwater sonar detection.
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Powder metallurgy mold materials
Including hard alloys, powder metallurgy high-speed steel, etc. The latter has a uniform structure, fine grains, no segregation, better toughness and wear resistance than cast high-speed steel, small heat treatment deformation, and long service life. It can be used to manufacture blanks of tools, molds and parts.
The above is an introduction to the raw materials used to produce powder metallurgy. Each material has different characteristics and applicable fields. For example, the automotive field requires alloy steel and other wear-resistant, corrosion-resistant materials with long gear life.
Harber Metal Group was founded in 2014 and is a national high-tech enterprise integrating R&D and production of powder metallurgy. The mim company has set up R&D center, testing center, metal powder forming (PM) division, powder injection molding (MIM) division and other industrial supporting facilities. It is a specialized, refined, special and new enterprise in Guangdong Province, an innovative enterprise in Guangdong Province, a science and technology small giant enterprise in Dongguan City, a director unit of Guangdong Powder Metallurgy Industry Technology Innovation Alliance, and an initiator of Dongguan Advanced Powder Metallurgy Cluster Promotion Center.