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Powder metallurgy
Powder metallurgy is a manufacturing metal powder and metal powder (sometimes adding a small amount of non-metal powder) as raw materials, mixing, forming and sintering, the material or article manufacturing techniques. It consists of two parts, namely:
(1) Production of metal powder (including alloy powder, hereinafter referred to as "metal powder").
(2) with a metal powder (sometimes adding a small amount of non-metal powder) as starting materials, mixing, forming and sintering, manufacturing materials (referred to as "PM Materials") or article (referred to as "powder metallurgy article").
Powder metallurgy production process
(1) Production of powder. Powder production process including the preparation of powder, mixed powder of other steps. In order to improve the powder moldability and plasticity are normally added oil, rubber or paraffin plasticizer.
(2) pressing. Powder at 15-600MPa pressure, pressed into the desired shape.
(3) sintering. Carried out in a high temperature protective atmosphere furnace or vacuum furnace. Sintered Unlike metal melting, there is at least one element is still in the solid state sintering. Between powder particles during sintering through diffusion, recrystallization, welding, compounds dissolved and a series of physical and chemical processes, to become metallurgical products have a certain porosity.
(4) post-treatment. Under normal circumstances, the sintered parts can be used directly. However, for certain size requirements of high precision and high hardness, wear resistance of the sintered article but also for treatment. After processing includes coining, rolling, extrusion, quenching, surface hardening, oil-soaked, and infiltration and so on.
The current status of PM
Our powder metallurgy industry has been nearly 10 years of rapid development, but with foreign industry are still gaps in the following areas:
(1) enterprises, small-scale, economic and foreign companies vary greatly.
(2) Cross, companies lower prices, competition is fierce.
(3) Most enterprises lack technical support, R & D capabilities backward, low-grade products, it is difficult to compete with foreign countries.
(4) lack of re-investment problems.
(5) process equipment, facilities behind.
(6) product export less, poor trade channels.
With China's accession to WTO, the above shortcomings and weaknesses will improve, since joining the WTO, the gradual internationalization of the market, powder metallurgy market will be further expanded opportunities; while at the same time with the entry of foreign capital and technology, metallurgy and related technology will also be improved and developed.
Powder metallurgy is a manufacturing metal powder and metal powder (sometimes adding a small amount of non-metal powder) as raw materials, mixing, forming and sintering, the material or article manufacturing techniques. It consists of two parts, namely:
(1) Production of metal powder (including alloy powder, hereinafter referred to as "metal powder").
(2) with a metal powder (sometimes adding a small amount of non-metal powder) as starting materials, mixing, forming and sintering, manufacturing materials (referred to as "PM Materials") or article (referred to as "powder metallurgy article").
Powder metallurgy production process
(1) Production of powder. Powder production process including the preparation of powder, mixed powder of other steps. In order to improve the powder moldability and plasticity are normally added oil, rubber or paraffin plasticizer.
(2) pressing. Powder at 15-600MPa pressure, pressed into the desired shape.
(3) sintering. Carried out in a high temperature protective atmosphere furnace or vacuum furnace. Sintered Unlike metal melting, there is at least one element is still in the solid state sintering. Between powder particles during sintering through diffusion, recrystallization, welding, compounds dissolved and a series of physical and chemical processes, to become metallurgical products have a certain porosity.
(4) post-treatment. Under normal circumstances, the sintered parts can be used directly. However, for certain size requirements of high precision and high hardness, wear resistance of the sintered article but also for treatment. After processing includes coining, rolling, extrusion, quenching, surface hardening, oil-soaked, and infiltration and so on.
The current status of PM
Our powder metallurgy industry has been nearly 10 years of rapid development, but with foreign industry are still gaps in the following areas:
(1) enterprises, small-scale, economic and foreign companies vary greatly.
(2) Cross, companies lower prices, competition is fierce.
(3) Most enterprises lack technical support, R & D capabilities backward, low-grade products, it is difficult to compete with foreign countries.
(4) lack of re-investment problems.
(5) process equipment, facilities behind.
(6) product export less, poor trade channels.
With China's accession to WTO, the above shortcomings and weaknesses will improve, since joining the WTO, the gradual internationalization of the market, powder metallurgy market will be further expanded opportunities; while at the same time with the entry of foreign capital and technology, metallurgy and related technology will also be improved and developed.
