Forged parts: basic introduction to forging
Source：未知Author：admin Date：2018-07-31 09:22 Browse：
A forging machine is used to apply pressure to a metal blank to cause plastic deformation to obtain a forging having a certain mechanical property, a certain shape and size. One of the two major components of forging. By forging, it can eliminate the looseness of the as-cast state of the metal, weld the hole, and the mechanical properties of the forging are generally superior to those of the same material. For the important parts of the machine with high load and severe working conditions, forged parts are used in addition to the simple-used rolled sheets, profiles or welded parts.
Forged parts can be divided into: 1 open forging (free forging) according to the forming method. The impact force or pressure is used to deform the metal between the upper and lower two irons (anvil) to obtain the required forging. The forging ratio is mainly manual forging and mechanical forging. 2 closed mode forging. The metal blank is subjected to compression deformation in a forging die having a certain shape to obtain a forged piece, which can be classified into die forging, cold heading, rotary forging, extrusion, and the like. Forging at deformation temperature can be further divided into hot forging (processing temperature is higher than recrystallization temperature of billet metal), warm forging (below recrystallization temperature) and cold forging (normal temperature).
The forging material is mainly carbon steel and alloy steel of various compositions, followed by aluminum, magnesium, titanium, copper and the like and alloys thereof. The raw state of the material is bar, ingot, metal powder and liquid metal. The ratio of the cross-sectional area of the metal before deformation to the cross-sectional area after deformation is called the forging ratio. Proper selection of forging ratios has a lot to do with improving product quality and reducing costs.