在环件轧制过程中，孔型是环件轧制的重要工艺参数之一。
The rolling pass is one of the important technological parameters of the ring rolling process.
在研究轧制工艺参数对轧制复合过程的影响时，重点探讨了轧制温度以及变形量的影响。
While studying the rolling influence of the course to rolling compounding of craft parameter, have probed into the rolling temperature and influence of deformation amount especially.
介绍了整体火车车轮的生产工艺和轧制设备，指出了车轮轧制过程中存在的问题。
The paper presents the manufacturing technology as well as the rolling equipment for one piece railroad wheel, and meantime, the problems existing in its rolling process.
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