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Tempering of heat treatment process

May 12, 2023

Tempering is a heat treatment process used to increase the toughness and ductility of materials such as steel. The tempering process involves heating a material to a temperature below its critical point, usually between 150°C and 700°C, and holding it at that temperature for a period of time before cooling it to room temperature.

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The purpose of tempering is to reduce the hardness and brittleness of a material that has been quenched or otherwise hardened. During tempering, some of the excess hardness is removed from the material, improving toughness, ductility and impact resistance.

The temperature and duration of the tempering process can be adjusted to achieve the desired properties of the material. The higher the tempering temperature and the longer the duration, the softer the material and the better the ductility; the lower the tempering temperature and the shorter the duration, the harder and more brittle the material.

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The tempering process is commonly used in the production of steel products such as tools, gears and springs. It is also used in the production of structural components, such as bridges and buildings, to increase their toughness and fracture resistance.