在锻造时，金属的脆性杂质被打碎 ，forging采购，顺着金属主要伸长方向呈碎粒状或链状分布；塑性杂质随着金属变形沿主要伸长方向呈带状分布 ，forging哪家好， 这样热锻后的金属*就具有一定的方向性。

When forging， the brittle metal impurities to be broken down，辽宁forging， the main direction of elongation is like particles of metal or plastic chain distribution; impurities with metal deformation distributed along the main direction of elongati*o after hot forging metal organization has certain direction.

自由锻生产率低，加工余量大，但工具简单，forging设备，通用性大，故被广泛用于锻造形状较简单的单件、小批生产的锻件。自由锻设备有空气锤、蒸汽-空气锤和水压机等，分别适合小、中和大型锻件的生产。

Free forging ha*any advantages such as low productivity， large machining allowance， but simple tool and versatility. So it is widely used for forging single piece and *all batch forgings with simpler shape. The free forging equipments include air hammer， steam air hammer and hydraulic press， etc.， which are suitable for the production of *all and medium he*y forgings， respectively.