Powder Metallurgy
Powder Metallurgy is a technology for manufacturing high-precision parts by taking metal powder, placing it into a die, compressing it to solidify it, and then sintering it at high temperatures. It is denoted as Powder Metallurgy, or abbreviated as PM or P/M.
In Powder Metallurgy, metal powder materials can be used efficiently through simple processes like "Mixing", "Compacting", and "Sintering". Since there is no need to shave or shape the part after compacting, it is an environmentally friendly technology that avoids wasting energy. Furthermore, for applications requiring high precision or strength, it is possible to create advanced components by performing processes such as "Repressing", "Quenching", and "Surface Treatment".
✅ Advantages
- Ease of Mass Production: Manufacturing using dies facilitates mass production, leading to cost reduction.
- Near-Net-Shape Manufacturing: Manufacturing near-net-shape parts using dies is possible. This leads to good material yield and further cost reduction through part integration.
- Applicable to Hard-to-Process Materials: The technology can be applied even to materials that are difficult to machine.
- Easy Material Property Adjustment: Material quality and composition can be easily adjusted through the blending of metal powders.
- Lightweight Components: Since the product usually contains many pores internally, the apparent density is lower than the true density, making it possible to lighten the weight of the components.
- Self-Lubricating Functionality: The pores can be utilized to absorb lubricating oil, eliminating the need for oil replenishment.
❌ Disadvantages
- Inferior Mechanical Properties: Since the apparent density is lower than the true density, mechanical properties such as strength are inferior compared to solid materials.
- Difficulty in Manufacturing Large Shapes: It is difficult to manufacture parts with large dimensions or complex internal features.
- Oxide Film Issue: The presence of an oxide film on the powder surface can sometimes cause issues during processing or in the final product.