NNX-D67 20X9 ET 24 17 P.C.D 5X112 center hole 66.6 1piece forged wheel (custom 16-24inch and date)   Is the Is the thermal treatment process of large forging parts complicated? Generally, the thermal treatment of large forging parts is combined with the cooling of the forging parts, because the cross-section size of the large forging parts is large and the production process is complicated. In the process of thermal treatment, some forgeds are prone to white dot defects due to uneven tissue performance.   Therefore, in addition to eliminating stress and reducing hardness, the main purpose of large forging heat treatment is to prevent white spots on the forging parts, improve the uniformity of forging chemical composition, and adjust and refine the microstrip of forging.