Forgings can improve the structure and mechanical properties of metals. Due to the deformation and recrystallization of metals, the original coarse dendrites and columnar crystals are transformed into equiaxed recrystallized structures. The grains are fine and uniform in size, which causes the original segregation and pores in the ingot. The pores and slag inclusions have been compacted and welded, so that the ingot structure is tighter and the plasticity and mechanical properties of the metal are improved.
The mechanical properties of the castings are lower than the forgings of the same material. In addition, the forging process can guarantee the continuity of the metal fiber structure, so that the fiber structure of the forging conforms to the shape of the forging, the metal flow line is complete, and the parts have good mechanical properties and Long service life, forging blanks produced by precision die forging, cold extrusion, warm extrusion and other processes are incomparable for castings.
Forging machining is an object that applies pressure to a metal by plastic deformation to form a desired shape or a suitable compressive force. This force is usually achieved by using a hammer or pressure. The casting process establishes a fine-grained structure and increases the physical properties of the metal. In practical applications, the correct design allows the particles to flow in the direction of the main pressure.
The casting is a metal forming object obtained by each casting method, that is, the molten liquid metal is injected into a pre-prepared casting mold by casting, injecting, suction or other casting method. After cooling, objects of shape, size and properties are obtained by falling sand, washing and post-treatment. Therefore, the manufacture of heavy machinery and important components has a specific meaning.