自由锻造所用工具和设备简单，通用性好，成本低。 同铸造毛坯相比，自由锻消除了缩孔、 缩松、气孔等缺陷，使毛坯具有更高的力学性能。锻件形状简单，操作灵活。

Free forging tools and equipment are simple，forging哪家好， versatility and low cost. Compared with the casting blank， the free forging eliminates the defects such as shrinkage porosity， porosity， porosity and so on， so that the blank has higher mechanical properties. The shape of the forgings is simple and the operation is flexible.

若因温度和变形程度选择不当而得到粗大晶粒时，可利用热处理相变细化晶粒组织，但对于热处理中不发生相变的钢种，forging报价，如奥氏体钢，就必须在锻造过程中获得细小而均匀的晶粒组织，因此对这样的材料在锻造时须加倍注意。

If the temperature and degree of deformation and improper selection of coarse grains， the grain refinement phase change heat treatment， but for the steel phase transition does not occur in the heat treatment， such as austenitic steel， it must be in the forging process have fine and uniform grains， so this kind of material in the forging must pay more attention to.

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，以免得到粗大晶粒组织。具体来说，高温下金属塑性好，forging，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 cidered， especially when the last fire is forged，forging价格， the critical deformation should be avoided as far as ， so as to avoid coarse grain structure. Concretely speaking， high temperature metal has good plasticity and small deformation resistance. We should adopt large deformation amount forging far greater than critical deformation degree. When low temperature correction is used， small deformation below critical deformation degree should be used for local trimming.

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