The test of single compact weight decrease proved that when the shrinkage ratio of the compacting die is increased to over 1.22, there is no more crack initiated in the compact inner hole.
并用压坯单重递减法试验证实，当将压模收缩比增加到1 2 2以上时，可以保证压坯内孔不出现裂纹。
The test of single compact weight decrease proved that when the shrinkage ratio of the compacting die is increased to over 1.22, there is no more crack initiated in the compact inner hole.
并用压坯单重递减法试验证实，当将压模收缩比增加到1 2 2以上时，可以保证压坯内孔不出现裂纹。
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