The forging ratio is a parameter that indicates the degree of deformation of the metal during the forging process. It is usually defined as the ratio of the cross-sectional area of ​​the metal before and after forging.
The size of the forging ratio can reflect the impact of forging on the metal structure and mechanical properties. The calculation method of the forging ratio will vary according to the specific forging process, such as drawing or upsetting. For the drawing process, the forging ratio can be expressed by the ratio of the cross-sectional area (F0, F1) or length (L0, L1) before and after drawing; while for the upsetting process, the forging ratio can be expressed by the cross-sectional area before and after upsetting. Expressed by the ratio of area (F0, F1) or height (H0, H1). Forging ratio is not only an important indicator to measure the quality of forgings, but also a key parameter to control the internal quality and performance of forgings. Proper selection of forging ratio is critical to ensuring the quality and performance of forgings.