Drop forging is a forging process where a hammer is raised and then "dropped" onto the workpiece to deform it according to the shape of the die. There are two types of drop forging: open-die drop forging and closed-die drop forging. As the names imply, the difference is in the shape of the die, with the former not fully enclosing the workpiece, while the latter does.
Hot forging of steel
■ Forging temperatures above the recrystallization temperature between 950 - 1250 °C
■ Good formability
■ Low forming forces
■ Constant tensile strength of the workpieces
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