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machining of powder metallurgy parts

by:Deyuan      2020-09-14
Powder metallurgy is the process technology of sintering and forming metal friction materials and products with metal powder as raw materials.
In powder metallurgy production, materials and parts have a future of high quality, low cost, energy saving and material saving.
The product structure of powder metallurgy data can be divided into powder metallurgy mechanical parts and ferrite magnetic data.
Including permanent magnet magnetic material, soft magnet magnetic material;
Hard alloy materials and products, high melting point metal materials, refractory metal materials and fine ceramic materials or products.
The powder metallurgy process has many important and unique advantages, such as the elimination of the net shape of the cut, and the use of parts manufactured by the powder metallurgy process, to some extent, consciously leaving the long-term remnants
Short structure, improve the parts from
In addition to the use of manganese powder metallurgy manufacturing processes capable of producing complex alloy parts with conventional casting processes, lubrication and noise are also difficult or impossible to manufacture.
The original intention of the powder metallurgy manufacturing process was to eliminate all processing, but this goal has not yet been achieved.
Most parts are only close to the final shape but need some finishing as well.
However, compared with castings and forgings, Powder Metallurgy parts are durable and difficult to process, which also restricts the promotion and application of powder metallurgy manufacturing process.
The hole rate reduces the processing performance of powder metallurgical parts.
Since the tool can be damaged by the porous structure, the porous structure is one of the features of the widely used powder metallurgy parts.
Porous structure is one of the common features of boron powder metallurgical parts.
The porous structure and noise of the reservoir also produce micro-intermittent cutting.
When the impact on the solid particles moves back and forth from the hole to the tip.
This can lead to small broken deformation and small chips along the cutting edge.
Difficult processing is one of the goals of the powder metallurgy industry in the continuous development, is to eliminate mechanical processing, and a major attraction of powder metallurgy process is only a small amount of processing, but a lot of parts still need to be treated with precision or better surface finish.
Unfortunately, the processing of these parts is very difficult.
Most of the troubles encountered were caused by air holes.
Some unique techniques to overcome these problems.
Penetration can usually close the porous surface structure.
Additional free cutting is usually required.
Recently, in order to improve the technology of powder production, increasing cleanliness and reducing oxide and carbide in heat treatment have been designed.
The porous structure of the closed surface is done by penetration of metal or polymer.
Experiments show that the penetration of the real bit is to close the surface of the porous structure, thus reducing the micro-cutting edgefatigue.
The most widely used tools in the processing of powder metallurgy parts are well worn surface roughness conditions, anti-edge cracking and BUE materials.
These features are useful for any processing operation, especially in the processing of powder metallurgy parts.
These tool materials, including Cubic boron nitrogen cutters, coatings and coated ceramics, and improved coated sintering carbide.
When the hardness of the powder metallurgical parts is lower than that of the Rockwell 35 degrees and the powder (FCu 663)
The hardness of the particles themselves does not exceed the range, and metal ceramics are usually selected.
Metal Ceramics is a hard metal ceramics that can effectively organize and withstand high speed.
Also, because metal-
Ceramics have been used for high
Speed steel and stainless steel are machined to finish, and they are generally suitable for ideal geometric grooves close to molded parts.
Metal Ceramics are most commonly used for turning and drilling operations.
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