This Is How Steel Gets Hardened: Factory Quenching For Super Strong Metal Parts - Video

The video shows heat treatment workers lifting a basket of red-hot steel parts out of an industrial furnace, preparing for the quenching process.

These workers wear special heat-resistant suits to protect themselves from extreme high-temperature radiation. The glowing steel parts, mainly machinery bushings and sleeves, have been fully heated to over 800°C inside the furnace to change their internal metal structure.

They will quickly lower the red-hot parts into a cooling tank. This fast cooling process will drastically harden the steel, greatly boosting its strength and wear resistance. This is quenching — a core industrial process that makes metal parts strong and durable enough for heavy mechanical use.