Gears are an indispensable part of mechanical components. The materials used to make gears must have strong bending fatigue strength and contact fatigue strength, while the tooth surface should have sufficient hardness and wear resistance, and the core needs to have a certain strength and toughness.
Modern gears widely utilize alloy steels, such as chromium-molybdenum steel and chromium-nickel steel, to provide superior performance. With continuous technological advancements, gears will evolve further in the future, with polymer materials and advanced metal alloys being applied to more demanding industries, such as medical, food machinery, chemical pharmaceuticals, and marine engineering. The evolution of gears drives the continuous improvement of the industry.
