Forging refines the grain structure and improves physical properties of the metal. With proper design, the grain flow can be oriented in the direction of principal stresses encountered in actual use. Grain flow is the direction of the pattern that the crystals take during plastic deformation. Physical properties (such as strength, ductility and toughness) are much better in a forging than in the base metal, which has, crystals randomly oriented.
Process:
The process includes forging billet cutting, forging billet heating and pretreatment before forming parts, post-forming heat treatment, cleaning, calibration and testing.
Equipment:
East forging foundry branch has the following essential equipment: 1 set of hydraulic press with capacity 31500KN; 3 sets of closed-die forging hammer with capacities of 3t,5t,10t respectively; 2 sets of open die forging hammer with capacities of 2t,5t respectively; 1 set of electric arc furnace with a capacity 5t; 4 sets of SCR intermediate-frequency electrical furnace all with capacity of 3t; 38 sets of various of machine tools including 5m and 3.5m vertical lathes and 1.6m*12m horizontal lathe. The equipment matched with the forging and casting equipment listed above including heating furnaces, trimming presses, manipulators for forging, feed-output devices for heating, heat-treatment furnaces, box heat generating electrical furnaces available in the widths ranging from two meters to eleven meters etc.