New Material Breakthrough: Powder Metallurgy Gears and the Art of Balancing Cost and Performance
2025-11-19
Under the dual pressures of pursuing high performance and low cost, powder metallurgy (PM) gear technology has made significant breakthroughs. This process involves compacting metal powder in a mold and then sintering it, enabling near-net-shape production with little to no cutting. The material utilization rate is over 95%, significantly reducing cost and energy consumption. Modern PM technology can produce high-strength gears with densities close to those of cast and wrought materials, and their mechanical properties can be further enhanced through subsequent processes like copper infiltration and heat treatment. A unique advantage of PM is its ability to easily create complex tooth profiles, special-shaped holes, and even multi-layer composite structures, which are difficult to achieve with traditional machining. Currently, PM gears have successfully expanded from past low-load applications (e.g., home appliances) into core areas like automotive engines and transmissions, becoming an important complement to traditional gear manufacturing technologies.
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