Continuous friction stir extrusion production method and production device for ultra-fine grain material

The invention provides a continuous friction stir extrusion production method and production device for an ultra-fine grain material. A pair of extrusion wheels is symmetrically arranged, and synchronously rotates in opposite directions to drive at least two blank materials to enter a die cavity from the two sides; a stir bar extends into the die cavity via a center hole of the die cavity to directly reach a converging zone of the at least two blank materials; friction stir processing of the blank materials is realized by rotation of the stir bar; the metal blank materials are fed into a stirzone continuously through rotation of the extrusion wheels; finished product blank materials are rapidly cooled after being extruded by an opening of an extrusion die to form continuous large-length ultra-fine grain type wire products; and forced cooling is performed on the interior of the stir bar through a cooling medium in an operation course. 本发明提供一种超细晶材料的连续搅拌摩擦挤压生产方法及其生产装置，通过一对挤压轮对称布置，同步反向旋转，驱动至少两根坯料从两侧进入模腔，搅拌棒由模腔的中心