What is the production process of powder metallurgy parts?

The production process of powder metallurgy parts, as a fine and multi-step manufacturing process, combines the essence of material science, mechanical engineering and heat treatment technology. This technology has been widely used in auto parts, electronics industry and other fields because of its high efficiency, flexibility and cost-effectiveness.

The production process of powder metallurgy parts usually includes the following main steps:

1. Powder preparation:

First, a suitable metal powder needs to be prepared. This can be achieved by various methods, such as atomization, reduction, etc. The particle size, shape and composition of these powders need to be strictly controlled to meet the requirements of subsequent processes.

2. Mixing:

The prepared metal powder and other additives (such as lubricants, alloying elements, etc.) are uniformly mixed in a certain proportion to ensure the consistency of the composition.

3. Forming:

The mixed powder is put into a mold and pressed to form a compact having a certain shape and density. The molding method includes press molding, injection molding, and the like.

4. Sintering:

The molded compact is placed in a high temperature furnace for sintering. During the sintering process, metallurgical bonding occurs between the powder particles, and the strength and density of the part are improved. The sintering temperature, time and atmosphere have an important influence on the performance of the parts.

5. Subsequent treatment:

According to specific requirements, some subsequent treatments may be required, such as finishing, heat treatment, surface treatment (such as electroplating, coating, etc.), to further improve the dimensional accuracy, mechanical properties and corrosion resistance of the parts.

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