Pressing and sintering of metals is a specialized process used to transform metal powders into solid, dense, and strong metal parts. This process is essential in the field of powder metallurgy, where it is used to create complex shapes and structures from metal powders.
3 Key Steps Explained
1. Blending
The process begins with the mixing of fine metal powders. These powders are often iron-based and are mixed with alloying elements and additives to achieve the desired properties of the final product.
2. Compaction
The blended powder is then pressed into a mold under high pressure to achieve the desired shape. This step compacts the powder but does not fully bond the particles, leaving the part relatively weak and brittle.
3. Sintering
The compacted part is heated in a controlled atmosphere, which allows the particles to bond together without melting. This step involves several sub-processes, including the removal of lubricants, reduction of oxide elements, and the actual bonding of particles. The result is a dense, strong, and durable metal part.
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