热-机影响区有塑性变形流线，且范围较窄；
There are plastic deformation streamlines in the thermo-mechanically affected zone and it is quite narrow.
试样的流线、网格变化及硬度分布所显示的变形区范围和理论分析一致。
Displaed strain regions by the flow lines, network changes and hardness distributions show a good agreement with theoretical analysis.
通过实验和变形区流线变化、金相组织和显微硬度的变化，对精冲成形的过程、特点、精冲成形机理进行了研究。
On the basis of experiment and change of metal flow line, metallographic structure and micro-hardness in deformation zone, this paper researched process, characteristic and mechanism of fine-blanking.
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