在考虑锻造工艺时特别是***后一火的锻造时，应尽量避免在临界变形程度下进行，以免得到粗大晶粒***。具体来说，高温下金属塑性好，变形抗力小，应采用远大于临界变形程度的较大变形量锻造；低温修正时采用低于临界变形程度的小变形量进行局部修整。

When the forging process is c***idered， especially when the last fire is forged， the critical deformation should be ***oided as far as ， so as to ***oid coarse grain structure. Concretely speaking， high temperature metal has good plasticity and ***all deformation resistance. We should adopt large deformation amount forging far greater than critical deformation degree. When low temperature correction is used， ***all deformation below critical deformation degree should be used for local trimming.

自由锻生产率低，加工余量大，forging谁家好，但工具简单，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 has many advantages such as low productivity，forging设备， 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.，丹东forging， which are suitable for the production of ***all and medium he***y forgings，forging厂家， respectively.

定期对设备进行***，所有的操作者工作之前必须带好防护用具。在进行锻造作业时，几个操作者之间要集中精力，互相配合，躲开***方向，选择相对安全的位置。

Maintenance of equipment on a regular basis， and all operators must take protective equipment before working. In the process of forging， several operators should their energy， cooperate with each other， ***oid the dangerous direction， and choose a relatively safe.

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