公开(公告)号：US20220178007A1

公开(公告)日：2022-06-09

申请号：US17498779

申请日：2021-10-12

Applicant: University of Science and Technology Beijing

Inventor： Zhiyong LIU ,  Xiaogang LI ,  Wei WU

IPC: C22C38/50 ,  C22C38/42 ,  C22C38/48 ,  C22C38/00 ,  C21D8/00

Abstract: A binary alloy design method for a marine high-strength low-alloy (HSLA) stress corrosion-resistant steel is provided. The binary alloy design method permits synergistic inhibition of anodic dissolution and hydrogen embrittlement by binary alloying to prepare the marine HSLA stress corrosion-resistant steel, the marine HSLA stress corrosion-resistant steel has an increase of more than 50% in stress corrosion resistance in a simulated SO2 polluted marine atmospheric environment. Microalloying of one element is carried out to improve properties of a rust layer on a surface of a HSLA steel in a marine environment and reduce a electrochemical activity in a local microenvironment to inhibit the anodic dissolution. Microalloying of another element is carried out to reduce a cathodic hydrogen evolution, to increase a hydrogen trap density and to decrease a multiplicative hydrogen diffusion channel density as well as enhance a hydrogen resistance of a structure to inhibit the hydrogen embrittlement.

公开(公告)号：US20220065771A1

公开(公告)日：2022-03-03

申请号：US16649279

申请日：2019-06-25

Applicant: University of Science and Technology Beijing

Inventor： Xuequn Cheng ,  Xiaogang Li ,  Chaofang Dong ,  Dawei Zhang ,  Hong Luo

IPC: G01N17/00 ,  G01N17/04

Abstract: The present disclosure provides a high-flux sensor suitable for corrosion big data monitoring and a method of manufacturing the same. The sensor includes a first metal sheet, a second metal sheet and an insulating sheet therebetween. The two metal sheets are laminated. The metal sheets and the insulating sheet form a test piece group. A through hole is drilled in the test piece group.

公开(公告)号：US11220733B1

公开(公告)日：2022-01-11

申请号：US17108436

申请日：2020-12-01

Applicant: University of Science and Technology Beijing

Inventor： Jinfeng Huang ,  Jin Zhang ,  Cheng Zhang ,  Chao Zhao ,  Yong Lian ,  Jianqiang Li ,  Cheng Zhang

IPC: C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C22C38/48 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C22C38/00

Abstract: The present application provides a low carbon martensitic high temperature strength steel and a preparation method thereof, wherein the chemical composition of the low carbon martensitic high temperature strength steel are: C: 0.10-0.25 wt %, Cr: 10.0-13.0 wt %, Ni: 2.0-3.2 wt %, Mo: 1.50-2.50 wt %, Si≤0.60 wt %, Mn≤0.60 wt %, W: 0.4-0.8 wt %, V: 0.1-0.5 wt %, Co: 0.3-0.6 wt %, Al: 0.3-1.0 wt %, Nb: 0.01-0.2 wt %, and a balance of Fe. The high temperature strength steel of the present application achieves high strength at high temperature by simultaneously precipitating both nano-coherent carbides and intermetallic compounds. It has an excellent toughness, and can be used for certain structural parts under special working conditions, such as aero-engines to increase its service life and service temperature.

公开(公告)号：US20210394259A1

公开(公告)日：2021-12-23

申请号：US17226019

申请日：2021-04-08

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Qing LIU ,  Yanshen HAN ,  Jiangshan ZHANG

IPC: B22D11/128 ,  B22D11/124 ,  B22D11/14

Abstract: A method for improving center segregation and surface crack of continuous casting medium-thick slab of peritectic steel reduces the cooling intensity at the earlier stage of solidification and enhancing the cooling intensity at the final stage of solidification. For example, the cooling water amount of the wide face of the mould is 3400-3600 L/min, and the cooling water amount of the narrow face of the mould is 480-530 L/min. The cooling water amount of the wide face of the foot roller section is 239-298 L/min, and the cooling water amount of the narrow face of the foot roller section is 61-65 L/min. The total cooling water amount of the sector segment is 1517-2166 L/min.

公开(公告)号：US11174524B1

公开(公告)日：2021-11-16

申请号：US17124506

申请日：2020-12-17

Applicant: University of Science and Technology Beijing

Inventor： Rong Zhu ,  Bohan Tian ,  Kai Dong ,  Guangsheng Wei ,  Rongfang Su

IPC: C21B13/12 ,  F27B3/19 ,  F27B3/08 ,  H05B6/18

Abstract: A production apparatus and method for electric arc furnace steelmaking with a fully continuous ultra-short process are provided. A continuous adding, melting, smelting and continuous casting of a metal material are integrated, and a metallurgy process is completed in a flowing of a molten steel, to realize a continuous production of ingot blanks. The production apparatus includes four operation sites of an electric arc furnace for melting and primary refining, a sealed tapping chute for molten steel flowing, a refinement storage bed for molten-steel desulfurization and alloying and a conticaster for continuous casting A material flow, an energy flow and a time stream in the four operation sites are in a dynamic equilibrium. The production apparatus and method realize a molten-steel casting is started within 120 minutes after the metal material is started to be continuously added, and an uninterrupted continuous production is maintained for above 80 hours.

公开(公告)号：US20210333018A1

公开(公告)日：2021-10-28

申请号：US16335676

申请日：2017-11-30

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Shengen Zhang ,  Bolin Zhang ,  Bo Liu ,  Lin Li

IPC: F24H9/20 ,  F23C9/06 ,  F23L7/00 ,  F24H1/00 ,  F24H1/18

Abstract: A double chambers boiler system with oxygen-enriched combustion is provided, relating to fields of thermal power engineering and mechanical manufacturing. The double chambers boiler system includes a boiler furnace subassembly and a combustion control subassembly. The boiler furnace subassembly includes a combustion chamber and a heat exchange chamber. The heat exchange chamber is arranged above the combustion chamber. A high temperature flue gas outlet is arranged between the combustion chamber and the heat exchange chamber. The combustion control subassembly includes a burner, a pure oxygen injector and a fuel injector. The double chambers boiler system with oxygen-enriched combustion is able to simultaneously solve problems of improving a combustion efficiency and reducing an emission concentration of NOx.

公开(公告)号：US20210266196A1

公开(公告)日：2021-08-26

申请号：US17265843

申请日：2020-07-09

Applicant: University of Science and Technology Beijing

Inventor： Tao LIU ,  Hongwei ZHANG ,  Jiajia LIU

IPC: H04L25/02 ,  H04L5/00 ,  H04B11/00 ,  H04L25/03 ,  H04J1/16 ,  H04B17/391

Abstract: A channel estimation method of a steel penetration system is configured to reduce computational complexity and required memory. The method includes: reconstructing, at a receiving end, a channel estimation with a compressed-sensing sparse reconstruction algorithm according to a received pilot signal to obtain estimation values of a channel state response of the steel penetration system; and equalizing a received signal of the receiving end according to the estimation values of the channel state response to obtain an equalized signal.

公开(公告)号：US10976470B2

公开(公告)日：2021-04-13

申请号：US17021099

申请日：2020-09-15

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Weiyao Zhu ,  He Liu ,  Yunfeng Liu ,  Qinglin Shu ,  Zhiyong Song ,  Ming Yue ,  Zenglin Wang ,  Debin Kong ,  Aishan Li ,  Bingbing Li ,  Guodong Zou

IPC: G01V99/00 ,  G06F30/20 ,  E21B49/08 ,  E21B43/26 ,  E21B47/06 ,  E21B49/00 ,  G06F113/08

Abstract: A simulation method for flow field of multi-stage fracturing on horizontal well in tight oil reservoir is provided. The tight oil reservoir comprises multiple horizontal wells with multi-stage fracturing, and for any horizontal well of the multiple horizontal wells, the method comprises: establishing a seepage mathematical model involving threshold pressure gradient according to reservoir physical property data and production data of the horizontal well, and determining formation pressure distribution of the horizontal well after multi-stage fracturing production according to the seepage mathematical model; determining formation pressure field distribution of the horizontal well after multi-stage fracturing production according to the formation pressure distribution and basing on principle of complex potential superposition; and establishing a criterion for identifying effective producing range of the horizontal well according to the formation pressure field distribution, and determining flow field range of the horizontal well according to the criterion.

公开(公告)号：US20210003004A1

公开(公告)日：2021-01-07

申请号：US17027951

申请日：2020-09-22

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： WEIYAO ZHU ,  MING YUE ,  JIANFA WU ,  KAI LIU ,  ZHEN CHEN ,  ZHIYONG SONG ,  DEBIN KONG

IPC: E21B49/00 ,  E21B47/10

Abstract: A method for identifying structure of flow field in unconventional gas reservoir is provided. The unconventional gas reservoir comprises at least one horizontal well, for any horizontal well in the at least one horizontal well, the method comprises: during fracturing fluid flowback stage, obtaining first production data, and drawing an actual production curve diagram of the fracturing fluid flowback stage; obtaining reservoir physical parameters corresponding to different fracture network forms and second production data, and performing numerical simulations on water production rate, gas production rate and casing pressure of the fracturing fluid flowback stage, and drawing layouts of structure of flow field corresponding to different fracture network forms of the fracturing fluid flowback stage; and comparing the actual production curve diagram with the layouts of structure of flow field corresponding to different fracture network forms to identify structure of flow field of the reservoir after fracturing.

公开(公告)号：US10884154B2

公开(公告)日：2021-01-05

申请号：US16343407

申请日：2018-03-30

Applicant: University of Science and Technology Beijing ,  Zhong-an Academy of safety Engineering

Inventor： Zhenlei Li ,  Xueqiu He ,  Dazhao Song ,  Shengquan He ,  Donghui Li

IPC: G01V3/12 ,  E21F17/18 ,  G01L5/00 ,  G01N27/72

Abstract: A monitoring and forewarning method for coal-rock dynamic disasters based on an electromagnetic radiation and an earth-sound monitoring includes the following steps: (1) calculating the weighted average value of research parameter P(t) during a time period according to the monitoring data collected by the electromagnetic radiation and the earth-sound monitoring system in real time; (2) calculating D(t), the deviation value of P(t); (3) calculating |D(t)| as the deviation threshold value, the average value of |D(t)| during period of normal mining of the working surface; (4) calculating DS, the number of times that D(t) is greater than |D(t)| in one day; (5) normalizing DS to obtain the monitoring and forewarning index ε; (6) forewarning the hazard state of dynamic disaster of the working surface in real time according to ε and forewarning method, determining hazard level.