Скачать или смотреть Tempering by fire and water: the moment when the hardcore of gears is born

In the video, a worker feeds a gear into an induction heating coil. The current creates eddy currents on the metal surface, instantly heating the gear to a fiery red. The gear is then quickly plunged into coolant to complete the quenching process. The stark contrast between the fiery red and the cold water, accompanied by steam and splashes, creates a striking industrial scene. The essence of this process is to use induction heating and rapid cooling to form a high-hardness martensitic structure on the gear surface, achieving "hard exterior, tough interior" properties. This allows the gear to withstand wear and impact at high speeds while maintaining sufficient toughness to prevent fracture. Every gear silently rotating within a machine undergoes this test of fire and water. Behind these seemingly ordinary parts lies the crystallization of the wisdom of materials science and engineering.