公开(公告)号：US20230405674A1

公开(公告)日：2023-12-21

申请号：US18035603

申请日：2020-12-31

申请人： South China University of Technology

发明人： Min ZHU ,  Zhongchen LU ,  Meiqin ZENG ,  Liuzhang OUYANG ,  Renzong HU ,  Hui WANG

IPC分类号： B22F9/04 ,  B02C17/10 ,  B02C17/14 ,  B02C21/00 ,  B22F9/14 ,  C01B32/21 ,  C01B32/949 ,  C01G41/02

CPC分类号： B22F9/04 ,  B02C17/10 ,  B02C17/14 ,  B02C21/00 ,  B22F9/14 ,  C01B32/21 ,  C01B32/949 ,  C01G41/02 ,  B22F2009/043 ,  C01P2002/88 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/80

摘要： Disclosed are a continuous low-temperature plasma powder treatment and ball-milling production device, and a method thereof. The device includes a powder circulating and conveying pipeline system (1), a ball mill (2), a low-temperature plasma discharge pipeline (3), a vacuum discharge system (4) and a controllable atmosphere system (5), where the powder circulating and conveying pipeline system (1) is sequentially connected to the ball mill (2) and the low-temperature plasma discharge pipeline (3) through pipelines; and the controllable atmosphere system (5) is connected to the powder circulating and conveying pipeline system (1). The powder circulating and conveying pipeline system (1) is used for circulating and conveying to-be-treated powder at a controllable air pressure and flow speed. On one hand, a double-dielectric barrier discharge structure is introduced in a powder conveying process to form the low-temperature plasma discharge pipeline (3), thereby realizing a plasma discharge treatment on a transfer material powder; and on the other hand, the ball mill (2) is introduced to perform ball-milling refining or alloying on a powder subjected to plasma discharge treatment, thereby treating the powder through a large-area, uniform and high-energy non-equilibrium plasma in cooperation with mechanical ball milling and being capable of being used for performing a surface circulating modification treatment on a conventional metal, macromolecule or oxide powder.

公开(公告)号：US20200056266A1

公开(公告)日：2020-02-20

申请号：US16343766

申请日：2017-12-21

申请人： SOUTH CHINA UNIVERSITY OF TECHNOLOGY

发明人： Min ZHU ,  Wei WANG ,  Zhongchen LU ,  Meiqin ZENG ,  Xianyong BAO

IPC分类号： C22C1/05 ,  C22C29/08 ,  C22C29/06

摘要： The invention discloses a preparation method of a WC cemented carbide with adjustable alignment of plate-shape grains. According to the theoretical composition of the cemented carbide, the weighed W powder is composed of two raw W materials with significantly different particle sizes in a certain mass ratio. Also graphite powder and Co powder are weighed. W—C—Co powder is subjected to planetary ball milling with controlled process parameters; then, after plasma-assisted ball milling, W—C—Co composite powder composed of small-sized lamellar W sheets and large-sized lamellar W sheet is obtained; Finally dense cemented carbide containing plate-shape WC grains is obtained by press molding of the ball milled power and in-situ carbonization through sintering at a high temperature. The invention not only provides simple preparation process with low energy consumption, but also can regulate the degree of orientated alignment of the plate-shape WC in the sintered block. Besides, the mechanical properties of the WC—Co cemented carbide containing plate-shape WC grains are optimized, so that the cemented carbide has excellent overall mechanical properties.