Copper powder can be produced though the water atomization, gas atomization process and the oxidation-reduction method. And its shape is spherical or irregular shape. Physical properties of atomized powder (such as: bulk density, mobility, particle size and green strength) is related with the process conditions, such as: specific additives, melting temperature, atomization pressure, the reduction temperature and post-processing of powder. Redox median diameter of powder through oxidation reduction is 10 microns. The bulk density is less than 1.5 g / cc. The green density is greater than 20MP. Atomized powder particle size and the reduction temperature are key factors in determining the powder products.

The first application of the copper powder (FCu) is to manufacture of bronze pieces using copper and tin powder mixtures. At peak production, the powder factory produces about 455 tons of copper powder every month. In the mid-1980s, smelting and electrolytic refining enterprises are forced to close due to plant closures, although some companies are trying to production of electrolytic copper powder, no electrolytic copper powder production. Today, the origin of electrolytic copper powder in Europe, Japan, Russia, India and South Korea.

Electrolytic copper powder particles with dendritic characteristics, bulk density by adjusting the process is less than 1 grams / cubic centimeter, and the green strength is greater than 35MP. Adjust the settlement process and powder processing, the bulk density can be improved. Atomization and oxidation to restore the nature of the powder with electrolytic copper powder in the application of the basic application exception is the need of dendritic powder and very low bulk density.

Processing of self-lubricating copper and tin based oil bearing (internal pores) Powder Metallurgy unique characteristics. These bearings are sintered to a certain density, porosity oil content can reach 10 to 30 percent. These bearings require regular lubrication to ensure the safe operation of the equipment life cycle. Self-lubricating bearings for the first time in 1920 at the Buick automobile industry. In other industrial use is quite large, changing the home appliances industry. Manufacturing self-lubricating bearings consumes about 55% of the production of copper powder.

Cu-Pb, and Cu-Pb-Sn bearings used in automotive, turbine, thrust washers and industrial pumping equipment. The steel backing material has replaced bronze bearings of the casting and forging, powder covering the steel substrate by sintering and rolling up to a certain density, the porosity of the final product is less than 0.25%. 5.9 ~ 6.4 million tons of North American usage of 22,000 tons, 18,000 tons in Europe, other countries, consumption of 4500 tons in 2002 the world copper powder usage estimates. About 55% copper powder bronze, 13% mixed with iron to produce powder metallurgy parts, 12% penetration of the sintered powder, 10% for brass, 10% for other applications.

In the brass powder and nickel powder alloy with the atomization production method, brass powder, the content of zinc is from 10% to 30%. Sometimes the lead is added to improve the mechanical properties. It is applied in the lock, instrument pointer and driving equipment. Because of the beautiful color, brass is used in decorative metal medals. The brass powder metallurgy parts now are used in robot arm parts. The tensile strength of sintered parts whose sintered density is7.7 g / cc is about 193MPa and the elongation rate is 14%. A lot of powder metallurgy parts show that the use of copper-based materials is very potential and creative in powder metallurgy process.

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