冷镦头剧烈变形能力与合金组织、塑性和剪切强度关系较大。
Big deformability was more related with its microstructure, plasticity, and shear strength.
结果表明，原材料热轧后冷速过快，造成组织异常，硬度偏高，导致了剪切开裂。
The results showed that high cooling rate of hot rolled billet resulted in abnormal microstructure formation and high hardness, which caused shear cracking.
首先，在冷态流动中完成了利用网格湍流控制射流剪切层的实验研究。
First of all, control of the shear layer of jets by grid turbulence was studied for isothermal flows.
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