Device and method for preparing ultra-fine grain block material at low temperature

• Main Authors: LIANG RUIKANG, SONG SHAOHUA, SONG WEI, HE MIN, JIAN XINYI, GU YUNJIE, YANG FENG, XIA XIAOLEI
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING

The invention discloses a device and method for preparing an ultra-fine grain block material at low temperature. The device comprises a low-temperature box, a lining and a female die assembly. The lining is fixedly arranged on a bottom plate of the closed box body, the central axis of the lining is perpendicular to the bottom plate of the closed box body, and the inner surface of the lining is of a big-end-up conical surface structure. The conical outer surface of the female die assembly of the frustum structure is of a conical surface structure matched with the inner surface of the lining, the female die assembly is of a two-half type separable structure with an attached connecting face, a spiral channel angular extrusion channel is formed in the female die assembly, and the space between the inner surface of the closed box body and the outer surface of the lining is filled with refrigerants. According to the invention, the metal block material can be subjected to two plastic deformations of extrusion and ex