Material Science Beyond Imagination
When engineers consider powder metallurgy (PM) gears, the most frequently asked question is: “How strong is its load-bearing capacity?” The answer to this question is being redefined by modern powder metallurgy technology.
Traditionally, PM gears, due to their internal porous structure, were considered inferior to dense forged gears in terms of fatigue resistance and load capacity. This porosity was a major limitation for the application of PM gears in high-load scenarios.
However, technological innovation has changed all of this. Through high-density pressing, selective surface densification, and advanced alloy formulations, modern PM gears can achieve densities exceeding 7.2 g/cm³, significantly improving contact fatigue strength.
Behind this progress is the unique design freedom of powder metallurgy: through topological optimization, PM gears can increase material in critical load-bearing areas and reduce weight in non-critical areas, achieving a “perfect balance of strength and lightweight.” This design flexibility is difficult to achieve with traditional manufacturing methods.
