公开(公告)号：US11911826B2

公开(公告)日：2024-02-27

申请号：US17200475

申请日：2021-03-12

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Gang Chen ,  Mingli Qin ,  Qiying Tao ,  Xuanhui Qu

IPC: B22F9/04 ,  B33Y70/00 ,  B01J2/16 ,  B22F1/052

CPC classification number: B22F9/04 ,  B01J2/16 ,  B22F1/052 ,  B33Y70/00 ,  B22F2009/044 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/15 ,  B22F2301/205

Abstract: A method of preparation of titanium and titanium alloy powder for 3D printing is based on a fluidized bed jet milling technique. Hydride-dehydrite titanium powder and titanium alloy powder are used as main raw material powder, jet milling and shaping are carried out in shielding atmosphere of nitrogen or argon, and finally high-performance titanium and titanium alloy powder meeting the requirements of 3D printing process is obtained. The titanium and titanium alloy powder prepared using this method has a narrow particle size distribution, approximately spherical shape, and controllable oxygen content.

公开(公告)号：US11900255B2

公开(公告)日：2024-02-13

申请号：US18183402

申请日：2023-03-14

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Yanping Bao ,  Ruixuan Zheng

IPC: G06N3/08

CPC classification number: G06N3/08

Abstract: The invention is in the field of iron and steel metallurgy, specifically a method and system for determining the amount of alloy added during the converter tapping process. Given that the LSTM neural network has a strong ability to capture nonlinear relationships, the invention builds an alloy element yield prediction model based on the LSTM neural network. Because different alloy elements have different factors that affect their yield, that is, different model input variables, different LSTM models are established for training. Furthermore, the invention uses integer linear programming to combine the yield prediction results to determine the alloy addition amount. This method not only finds the optimal alloy proportioning scheme quickly, but it also improves the component hit rate and the stability of steel products in the converter steelmaking process, obtains the lowest total cost, effectively reduces alloying costs, and has a good application prospect.

公开(公告)号：US20230407442A1

公开(公告)日：2023-12-21

申请号：US18125173

申请日：2023-03-23

Applicant: University of Science and Technology Beijing

Inventor： You WANG ,  Zhangjian ZHOU

IPC: C22C33/06 ,  C22C33/00 ,  C22C38/34 ,  C22C38/22 ,  C22C38/24 ,  C22C38/00

CPC classification number: C22C33/06 ,  C22C33/006 ,  C22C38/002 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34

Abstract: Disclosed are a high strength-ductility matched oxide-particles dispersion steel, a preparation method and application thereof, belonging to the technical field of novel structural materials. The high strength-ductility matched oxide-particles dispersion steel comprises the following components in percentage by mass: chromium (Cr) 11.0-13.0 percent (%), tungsten (W) 1.0-2.0%, vanadium (V) 0.1-0.2%, yttrium (Y) 0.3-0.4%, oxygen (O) 0.05-0.15%, silicon (Si) 1.5-2.5%, carbon (C)≤0.0016%, with iron (Fe) and unavoidable impurities accounting for a rest. The high strength-ductility matched oxide-particles dispersion steel in the present application is prepared, using a powder metallurgical preparation method, by introducing high-content of silicon elements and introducing high-density oxide particles with a complete core-shell structure using a specific heat treatment regime.

公开(公告)号：US11788160B2

公开(公告)日：2023-10-17

申请号：US17049449

申请日：2020-01-21

Applicant: University of Science and Technology Beijing

Inventor： Chao Feng ,  Rong Zhu ,  Guangsheng Wei ,  Baochen Han ,  Kai Dong ,  Xueliang Wang ,  Wenhe Wu ,  Shaoyan Hu ,  Weifeng Li ,  Juanjuan Jiang ,  Jianfeng Dong

IPC: C21C5/32 ,  C21C5/46

CPC classification number: C21C5/32 ,  C21C5/4673

Abstract: The present disclosure provides a converter CO2—O2 mixed injection smelting method and a fire point area temperature dynamic control method. The method realizes online monitoring through an infrared temperature sensor installed inside an oxygen lance, dynamically adjusts the mixing ratio of CO2 and O2 and the height of the oxygen lance position according to the fire point area temperature changes and process requirements in different smelting stages, so that the secondary smelting system interlockingly and dynamically controls the fire point area temperature and the molten pool heating rate.

公开(公告)号：US20230142397A1

公开(公告)日：2023-05-11

申请号：US17897257

申请日：2022-08-29

Applicant: University of Science and Technology Beijing

Inventor： Qing LIU ,  Leilei ZOU ,  Jiangshan ZHANG ,  Huisheng WANG ,  Biao TAO

IPC: B22D11/22 ,  B22D11/00 ,  C21D6/02

CPC classification number: B22D11/225 ,  B22D11/001 ,  C21D6/02

Abstract: A secondary cooling control method for reinforcing surface solidification structure of microalloyed steel continuous casting bloom includes: in situ observing precipitation behavior of secondary phase particles of the microalloyed steel, and determining a concentrated precipitation temperature range; cooling the microalloyed steel at different cooling rates, obtaining a particle size and a volume fraction of the secondary phase particles of the microalloyed steel at different cooling rates; determining an optimal average cooling rate; determining an optimal average cooling rate r; determining an optimal average cooling rate; and determining an optimal average cooling rate range through intersection of the three optimal average cooling rates whereby the continuous casting secondary cooling is optimized. The present invention can enhance the surface solidification structure of continuous casting bloom and reduce surface and subsurface cracks of the microalloyed steel continuous casting bloom.

公开(公告)号：US20230083210A1

公开(公告)日：2023-03-16

申请号：US17730232

申请日：2022-04-27

Applicant: University of Science and Technology Beijing

Inventor： Wei HE ,  Xiaoyang WU ,  Xinyue TANG ,  Qiang FU ,  Yongbin SUN ,  Yao ZOU ,  Xiuyu HE ,  Hui ZHANG ,  Changyin SUN ,  Yaonan WANG

IPC: G05D1/10

Abstract: A flapping-wing aerial robot formation control method includes: determining a trailing vortex generation mechanism, an energy saving principle and a trailing vortex attenuation mechanism of the formation flight of a group of wild geese in accordance with the pattern of the formation flight of the group of wild geese; determining the formation flight of a group of flapping-wing aerial robots and a formation switching solution in accordance with the trailing vortex generation mechanism, energy saving principle and trailing vortex attenuation mechanism of the formation flight of the group of wild geese in conjunction with the flapping characteristic of a flapping-wing aerial robot from the perspective of energy consumption equalization and energy saving; and carrying out formation keeping control and formation reconfiguration control in accordance with the formation flight of the group of flapping-wing aerial robots and the formation switching solution by controlling positions of the group of flapping-wing aerial robots.

公开(公告)号：US20230015174A1

公开(公告)日：2023-01-19

申请号：US17891342

申请日：2022-08-19

Applicant: University of Science and Technology Beijing

Inventor： Xiaolu Pang ,  Tao Guo ,  Kewei Gao

IPC: C23C14/34 ,  C23C14/06 ,  C23C14/00 ,  C30B29/38 ,  C30B25/06 ,  C30B25/18 ,  C01B21/06

Abstract: In a general aspect, a ceramic thin film with nanotwinned regions at a tunable volume fraction is manufactured. In some aspects, a method for manufacturing a ceramic thin film on a surface of a substrate in an evacuated chamber is disclosed. The ceramic thin film includes crystalline grains; and each of the crystalline grains includes one or more nanotwinned regions. The one or more nanotwinned regions have a volume fraction in a range of 30-80% of the ceramic thin film. The ceramic thin film comprises titanium, nitrogen, and boron. A plurality of targets including a plurality of sputtering materials is prepared. A gas atmosphere in the evacuated chamber is formed. Electric power is supplied to the plurality of targets to cause co-sputtering of the plurality of sputtering materials to form the ceramic thin film with the one or more nanotwinned regions.

公开(公告)号：US20220406413A1

公开(公告)日：2022-12-22

申请号：US17844364

申请日：2022-06-20

Applicant: North China University of Technology ,  Yanshan University ,  University of Science and Technology Beijing

Inventor： LIFENG ZHANG ,  WEIJIAN WANG ,  QIANG REN ,  YING REN ,  YAN LUO

IPC: G16C20/10 ,  G16C20/70

Abstract: A method for predicting a yield of calcium in a calcium treatment process based on deep neural network as provided relates to a calcium treatment process of molten steel refining in the field of iron and steel metallurgy, and includes steps of: obtaining production and operation data information of each of charges and thereby constructing a dataset; training and testing a deep neural network based on constructed dataset to establish a prediction model; and based on the prediction model, predicting and calculating current yield of calcium by taking actual production and operation data information of each charge as input. The method can predict the yield of calcium in the calcium treatment process, is favorable for accurately controlling a calcium content of steel, can stably control the calcium treatment process, improve the calcium treatment effect, improve the product quality, and ensure the production stability.

公开(公告)号：US20220362839A1

公开(公告)日：2022-11-17

申请号：US17639901

申请日：2021-11-25

Applicant: University of Science and Technology Beijing

Inventor： Jingyuan LI ,  Shang DAI ,  Chen CAI ,  Mingfan QI ,  Jinbo GU ,  Jianxin XIE

IPC: B22D13/02 ,  B22D13/04 ,  B22D13/10 ,  B22D13/12 ,  B29C39/08 ,  B29C39/22 ,  C03B19/02

Abstract: A screw smelting machine melts raw materials with a different chemical ratio in a mixing funnel in a feeding order to prevent the long-range diffusion of a melt, and controls outflow at a suitable speed. A centrifugal casting machine solidifies the melt with the ingredients gradient varying into a radial ingredient gradient material by a centrifugal casting style. A temperature sensor monitors temperature of an outer surface of a centrifuge cavity of the centrifugal casting machine during centrifugal casting, and transmits the temperature to a control platform. The control platform determines an optimal flow rate of the melt at an end of screw rod according to ingredient gradient of ingredient radial-gradient pipe materials and a thickness of each component gradient material required with preparation, in combination with a real-time data fed back from the temperature sensor, and feeds back to a feeding end.

公开(公告)号：US20220356543A1

公开(公告)日：2022-11-10

申请号：US17740091

申请日：2022-06-30

Applicant: University of Science and Technology Beijing

Inventor： Baijun YAN ,  Zihui DONG ,  Jie ZHANG

IPC: C22B7/04 ,  C22B7/00 ,  C22B34/32 ,  C22B34/22 ,  C22B34/12

Abstract: The present disclosure provides a method for co-extraction of vanadium, titanium and chromium from vanadium slag. The method selectively reduces pyroxene and fayalite wrapped on spinel through low-temperature hydrogen reduction, iron removal by ferric chloride, and low-temperature leaching of the vanadium slag by oxalic acid, thereby destroying a structure of the spinel, dissociating a spinel phase and a silicate phase, and fully exposing the spinel phase. The method also directly leaches the vanadium slag at a low temperature by acidity and strong complexation of the oxalic acid, and destroys the structure of the spinel, such that vanadium, titanium, chromium and oxalate are complexed into a solution to co-extract vanadium, titanium and chromium. The present disclosure extracts vanadium, titanium and chromium from the vanadium slag, with a leaching rate each being greater than 99%.