Basic Knowledge of Forging
Basic Knowledge of Forging
Forging is a processing method that uses forging machinery to apply pressure to metal billets to cause them to undergo plastic deformation to obtain forgings with certain mechanical properties, shapes and sizes. Forging can eliminate defects such as as-cast looseness produced during the smelting process, optimize the microstructure, and because the complete metal flow lines are preserved, the mechanical properties of forgings are generally better than those of castings of the same material.
Application areas of forging
Forging is widely used in the fields of automobiles, general machinery, etc., and is used to manufacture important parts with high loads and severe working conditions. For example, parts with simpler shapes can be made of rolled plates, profiles or welded parts, while parts with complex shapes are mostly made of forgings.
Forging methods and equipment
Forging methods mainly include hot forging and cold forging. Hot forging is carried out at high temperatures and is suitable for mass production; cold forging is carried out at room temperature and is suitable for small-batch production. Forging equipment can be divided into limited forging force forms, quasi-stroke limiting methods, stroke limiting methods and energy limiting methods according to the characteristics of deformation limitation.
Temperature range and heating specifications for forging
The temperature range for forging includes the initial forging temperature and the final forging temperature. The initial forging temperature should ensure that the steel is not overburned, and the final forging temperature should ensure that the steel has sufficient plasticity before final forging. The heating specifications include furnace charging temperature, heating rate, final heating temperature, etc., in order to reduce defects such as oxidation and decarburization, and improve production efficiency and forging quality.