Views:49 Author:Ronsco Publish Time: 2021-05-15 Origin:Ronsco
Forged steel bar is a processing method that uses forging machinery to apply pressure to metal blanks to produce plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes, and one of the two major components of forging (forging and stamping) .
Forging can eliminate defects such as loose as-cast during the smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than castings of the same material. For the important parts of related machinery with high load and severe working conditions, in addition to simpler shapes that can be rolled, profiles or welded parts, forgings are mostly used.
Compared with castings, forging metal can improve its structure and mechanical properties after forging. After the casting structure is deformed by the forging method due to the deformation and recrystallization of the metal, the original coarse dendrites and columnar grains become the equiaxed recrystallized structure with finer grains and uniform size, which makes the original segregation in the steel ingot, The compaction and welding of looseness, pores, slag inclusions, etc., make the structure more compact and improve the plasticity and mechanical properties of the metal.
The mechanical properties of castings are lower than the mechanical properties of forgings of the same material. In addition, the forging process can ensure the continuity of the metal fiber structure, keep the fiber structure of the forging consistent with the shape of the forging, and the metal streamline is complete, which can ensure that the parts have good mechanical properties and long service life. Precision die forging and cold extrusion are used. Forgings produced by processes such as, warm extrusion, etc. are unmatched by castings.