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Forging Process and Material Requirements

Different forging methods have different processes, among which hot die forging process is the longest, and the general sequence is: forging blank blanking; forging blank heating; roll forging blank preparation; die forging; trimming; punching; correction; intermediate inspection, inspection of forging size and surface defects; forging heat treatment, to eliminate forging stress and improve metal cutting performance; cleaning, mainly to remove surface oxygen. Generally, forgings shall be subject to appearance and hardness inspection, and important forgings shall be subject to chemical composition analysis, mechanical property, residual stress and other inspection and NDT.

In addition to the common materials used in forging, such as carbon steel and alloy steel of various components, followed by aluminium, magnesium, copper, titanium and their alloys, the wrought alloys of iron-based superalloy, nickel-based superalloy and cobalt-based superalloy are also forged or rolled, but these alloys are relatively difficult to forge due to their relatively narrow plastic zone Different materials used in forging have strict requirements on heating temperature, open forging temperature and final forging temperature.