(1) The difference in axial and radial mechanical properties of forgings is smaller than that of rolled products.
That is to say, the isotropy of forgings is much higher than that of rolled products, so the life of forgings is much longer than that of rollings.
The following figure shows the metallographic diagram of the eutectic carbides in different directions of the Cr12MoV rolled sheet.
(2) In terms of the degree of transformation, the degree of deformation of the forging is much greater than that of the rolling, which means that the effect of breaking eutectic carbide through forging is better than that of rolling.
(3) In terms of processing cost, the cost of forging is much higher than the cost of rolling.
For some key parts, workpieces that are subject to large loads or impacts, and workpieces with complex shapes or very strict requirements, forging must be used for processing.
(4) Forgings have complete metal flow lines.
The integrity of the metal streamline is destroyed by mechanical work after rolling, which greatly shortens the life of the workpiece.
The following picture shows the metal flow lines of casting, machining and forging workpieces.
