The advantages of metal powder injection molding dynamic magnetic pressing technology

The advantages of metal powder injection molding dynamic magnetic pressing technology

The metal powder injection molding technology needs to press the product, and the traditional pressing technology has certain limitations. With the continuous development of powder metallurgy technology, there has been a series of new powder metallurgy pressing technology, dynamic magnetic pressing technology is one of the new technology, then, what are the advantages of metal powder injection molding dynamic magnetic pressing technology?

Advantages of metal powder injection molding dynamic magnetic pressing:

1, because the mold is not used, the mold wall friction is reduced to 0 during molding, so higher pressing pressure can be achieved, which is conducive to improving the product and low production cost;

2, because in any temperature and atmosphere can be pressurized, and applicable to all materials, so the working conditions are more flexible;

3, because this process does not use lubricants and binders, so the molding products do not contain impurities, high performance, but also conducive to environmental protection;

4, moving magnetic pressing parts can be sintered under conventional sintering conditions, and its mechanical properties are higher than traditional pressing parts. Moving magnetic pressing is suitable for the manufacture of cylindrical symmetrical near-final parts, thin-walled tubes, parts with high aspect ratio and parts with complex internal shapes;

5, moving magnetic pressing is being used to develop high-performance bonded Ndfeb magnets and sintered samarium cobalt magnets. Due to the high density of the bonded NdFeb magnet pressed by moving magnetic, its magnetic energy product can be increased by 15%-20%.

Powder metallurgy sintering methods usually have the following categories:

1. Liquid phase sintering

If there are more than two kinds of components in the powder compact, sintering may be carried out above the melting point of a certain component, so a small amount of liquid phase appears in the powder compact during sintering.

2, pressure sintering

During sintering, pressure is applied to the powder body to promote its densification process. Pressure sintering is sometimes synonymous with hot pressing, a process that combines the forming and sintering of powder to directly produce powder metallurgy products.

3, activation sintering

Some physical or chemical measures are adopted in the sintering process, so that the sintering temperature is greatly reduced, the sintering time is significantly shortened, and the performance of the sintered body is improved and enhanced.

4. Electric spark sintering

The powder body is sintered by direct current and pulse electricity to generate arc between powder particles during forming and pressing. Pressure is gradually applied to the workpiece during sintering, combining the two processes of forming and sintering.

5, powder solid phase sintering

Powder sintering method in which the components of loose powder or compact do not melt during sintering. Powder solid-phase sintering can be divided into two categories according to the number of its components: unit solid-phase sintering and multicomponent solid-phase sintering.