What are the differences between hot forging and cold forging?

Hot forging and cold forging are both methods of shaping metal, but they differ in the temperature at which they are performed.
Hot forging involves heating the metal above its recrystallization temperature, typically around 60% to 80% of the metal’s melting temperature. This makes the metal easier to deform, allowing it to be shaped into the desired form. Hot forging is generally used for larger, more complex parts, and can result in stronger, more durable products due to the metal’s increased ductility at high temperatures.
Cold forging, on the other hand, is performed at or near room temperature, and does not involve heating the metal to high temperatures. This method relies on the metal’s inherent strength and elasticity to shape it into the desired form through the application of force. Cold forging is often used for smaller, simpler parts, and can result in faster production times and reduced material waste compared to hot forging.
Overall, the choice between hot forging and cold forging depends on the specific characteristics and requirements of the metal being shaped, as well as the desired end product.

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