Patents by Inventor Shengli Cui

Shengli Cui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • METHOD OF MAKING RARE EARTH PERMANENT MAGNET WITH EXCELLENT MAGNETIC PROPERTY
    Publication number: 20170333993
    Abstract: Disclosed is a method of manufacturing a rare earth permanent magnet with substantially improved magnetic property. The method comprises: preparing a magnet master alloy by melting an R-T-B based alloy; pulverizing the magnet master alloy to provide a magnet powder; pressurizing the magnet powder as applying magnetic field to the magnet powder under an inert atmosphere to form a magnet molded body; sintering the magnet molded body under a vacuum atmosphere to obtain a sintered magnet molded body having oxygen content of about 0.1 wt % or less based on the total weight of the sintered magnet molded body; and treating the sintered magnet molded body with Dy and Tb.
    Type: Application
    Filed: December 5, 2016
    Publication date: November 23, 2017
    Inventors: Jae Ryung Lee, Zhongjie Peng, Shengli Cui, Zhanji Dong, Yongcong Sun, Hongjian Chen
  • Method for producing an R-T-B-M sintered magnet
    Patent number: 9672981
    Abstract: The present invention provides a method for producing an R-T-B-M sintered magnet having an oxygen content of less than 0.07 wt. % from R-T-B-M raw materials. The composition of R-T-B-M includes R being at least one element selected from a rare earth metal including Sc and Y. The composition also includes T being at least one element selected from Fe and Co. B in the composition is defined as Boron. The composition further includes M being at least one element selected from Ti, Ni, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Cu, Ga, Mo, W, and Ta. The present invention provides for a step of creating an inert gas environment in the steps of casting, milling, mixing, molding, heating, and aging to prevent the powder from reacting with the oxygen in anyone of the above mentioned steps.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: June 6, 2017
    Assignee: YANTAI SHOUGANG MAGNETIC MATERIALS INC.
    Inventors: Xifeng Lin, Kaihong Ding, Yongjie Wang, Shengli Cui, Zhong Jie Peng, Wenchao Li
  • R-T-B-M-C sintered magnet and production method and an apparatus for manufacturing the R-T-B-M-C sintered magnet
    Patent number: 9672980
    Abstract: The present invention discloses an R-T-B-M-C sintered magnet and a method for manufacturing the R-T-B-M-C sintered magnet from an R-T-B-M-C alloy powder including the lubricant. The present invention also discloses an apparatus for manufacturing the R-T-B-M-C sintered magnet from the R-T-B-M-C alloy powder including the lubricant. The apparatus includes an alloy powder feeding mechanism for distributing the R-T-B-M-C alloy powder including the lubricant, a filling mechanism including a mold for receiving the R-T-B-M-C alloy powder including the lubricant, a press mechanism for compressing the R-T-B-M-C alloy powder including the lubricant and a stacking mechanism for storing the mold including the R-T-B-M-C alloy powder including the lubricant.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: June 6, 2017
    Assignee: YANTAI SHOUGANG MAGNETIC MATERIALS INC.
    Inventors: Zhongjie Peng, Xiaotong Liu, Shengli Cui, Kaihong Ding
  • METHOD FOR PRODUCING AN R-T-B-M SINTERED MAGNET
    Publication number: 20150023831
    Abstract: The present invention provides a method for producing an R-T-B-M sintered magnet having an oxygen content of less than 0.07 wt. % from R-T-B-M raw materials. The composition of R-T-B-M includes R being at least one element selected from a rare earth metal including Sc and Y. The composition also includes T being at least one element selected from Fe and Co. B in the composition is defined as Boron. The composition further includes M being at least one element selected from Ti, Ni, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Cu, Ga, Mo, W, and Ta. The present invention provides for a step of creating an inert gas environment in the steps of casting, milling, mixing, molding, heating, and aging to prevent the powder from reacting with the oxygen in anyone of the above mentioned steps.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 22, 2015
    Inventors: Xifeng Lin, Kaihong Ding, Yongjie Wang, Shengli Cui, Zhong Jie Peng, Wenchao Li
  • R-T-B-M-C Sintered Magnet And Production Method And An Apparatus For Manufacturing The R-T-B-M-C Sintered Magnet
    Publication number: 20140210580
    Abstract: The present invention discloses an R-T-B-M-C sintered magnet and a method for manufacturing the R-T-B-M-C sintered magnet from an R-T-B-M-C alloy powder including the lubricant. The present invention also discloses an apparatus for manufacturing the R-T-B-M-C sintered magnet from the R-T-B-M-C alloy powder including the lubricant. The apparatus includes an alloy powder feeding mechanism for distributing the R-T-B-M-C alloy powder including the lubricant, a filling mechanism including a mold for receiving the R-T-B-M-C alloy powder including the lubricant, a press mechanism for compressing the R-T-B-M-C alloy powder including the lubricant and a stacking mechanism for storing the mold including the R-T-B-M-C alloy powder including the lubricant.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Inventors: Zhongjie Peng, Xiaotong Liu, Shengli Cui, Kaihong Ding