熔体体积流动速率（MVR）是表征聚合物流动特性的重要参数之一。

Melt volume flow rate (MVR) is one of the important parameters for characterization of flow property of polymers.

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根据轴向体积流动规律导出了法兰环件轧制尺寸变化规律和其各种轧制用毛坯的体积分配规律。

The volume flow amount is also calculated. The dimension variation law for rolling flange ring and the volume distribution law for its rolling blank are derived from the axial volume flow.

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基于阶梯孔环件轧制体积流动规律，提出了阶梯孔环件轧制用毛坯设计原理和方法，并进行了轧制实验验证。

The blank design principle and method for rolling ring with stepped hole is developed based on the volume flow law and the comparison to the ring rolling experiment is done.

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