So the grain size was restricted in dynamic recrystallization.3) At 300℃, the CT-Mg-6Zn-1Y-1Ce alloy after direct extrusion has the finest grains.
3)正挤压CT-Mg-6Zn-1Y-1Ce镁合金,300℃时所得晶粒最为细小,当温度超过370℃时,组织发生完全动态再结晶。
参考来源 - 变形参数对Mg·2,447,543篇论文数据，部分数据来源于NoteExpress
But the direct extrusion press has a thermodynamic problem.
但是正向挤压机也存在一个热力学的问题。
The direct extrusion press design is the most popular design because it is simple to produce, operate and maintain.
正向挤压机是普遍采用的设计，因为它易于生产加工、控制使用和维护保养。
The deforming force of cone-die direct extrusion is solved by a mathematic method based on the simplified flow model of slip line field.
基于滑移线场的简化流动模型，运用数学方法求解出了一种锥形模正挤压变形力的最佳上限解，并将该上限解用通用解析式表达出来。
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