铝合金锻件中有时有未锻合的疏松和残留的枝晶自由表面，并保留有原始的结晶台阶。
Unhealed porosities and free surface of dendrites with crystalline steps were occasionally observed in aluminium alloy forgings.
并采用组合的模具结构和局部加载方法等，成功地锻制出上机匣锻件。
The Combined die structure and local loading method were adopted. The upper housing was forged successfully by isothermal precision forging.
在通用压机上生产类似全纤维曲轴一类锻件的先进工艺为多向镦锻法。
The advanced technology for producing these kind of forgings which are similar to full fi-bers crankshaft forging on a general forging press is upsetting and offsetting operation.
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