研究了坯料尺寸对等径角挤压材料等效应变及单位挤压力的影响。
The effect of billet size on the effective strain and unit extrusion pressure was investigated during equal channel angular pressing.
本文对空心件反挤的单位挤压力，采用滑移线法和上限法进行了计算。
The unit pressure in backward extruding hollow billet has been calculated by the slip line method and the upper bound method.
并导出了平底及锥形凹模内正挤空心件时单位挤压力的计算公式。
The formulas of extrusion for hollow parts in the square dies and the conical dies has been derived.
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