Shanxi Jin Zhengda answers for you the knowledge of stainless steel forgings: the difference between castings and forgings? Generally speaking, the mechanical properties of castings are lower than those of forgings with the same mechanical properties. In addition, the metal forging process can ensure the continuity of the fiber structure, the forging of the fiber structure, the same forging appearance, the completion of metal flow, can ensure that the parts have good mechanical properties and long service life and precision die forging, cold extrusion, extrusion temperature and other processes of forging, casting is unparalleled.
The structure and mechanical properties of metals can be improved by forging. The method of forging hot deformation of casting structure makes the original coarse dendrite and columnar grain fine and uniform axially recrystallized structure due to the deformation and recrystallization of metal, which makes the original apartheid of ingot, porosity, slag compaction and welding, such as tighter structure, plasticity and mechanical properties of metal.
According to practical work experience, although forgings and castings processing, it can still be seen. It must be carefully observed. It must have different structures, such as brightness, color, etc. But if you just look at it in general, or have no experience, you can't see it. If you have rich experience, you can even infer the process of its blank casting. Centrifugal casting is different from conventional casting and precision casting, but there are still some difficulties after treatment. So with tools, it's easy.
Differences in mechanical properties: secondary work hardening after forging, compact structure, omni-directional mechanical properties, better than castings; different formation methods: good melting ratio of melting furnace after casting, injection model, cooling forming, repeated pressing under the action of pressure.