What is hot forging

The difference between hot forging and cold forging is the temperature. Usually the temperature above 800? is hot forging.  Hot forging is forging process that forging a metal above its recrystallization temperature The high temperature will improve the plastic of metals and help to improve the intrinsic quality of the workpiece, making it difficult to crack. High temperature could reduce the deformation resistance of metals and reduce the tonnage required of forging machines. However the hot forging products have poor accuracy of the workpiece, surface is not smooth, easy to be oxidation, decarbonization and burning.So most of them need the machining, sawing, polishing and other services.ادامه مطلب...

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