公开(公告)号：US09908174B2

公开(公告)日：2018-03-06

申请号：US15718005

申请日：2017-09-28

Applicant: Kobe Steel, Ltd.

Inventor： Eisuke Kurosawa ,  Takehiro Nakaoka ,  Hideto Oyama ,  Hidetaka Kanahashi

IPC: B22D11/115 ,  B22D11/041 ,  H05H1/44 ,  F27D27/00 ,  B22D21/00 ,  B22D11/00

CPC classification number: B22D11/115 ,  B22D11/00 ,  B22D11/001 ,  B22D11/04 ,  B22D11/041 ,  B22D21/005 ,  B22D27/02 ,  F27D27/00 ,  H05H1/44

Abstract: In the present invention the torch movement period is 20-40 seconds, with the torch movement period being the time required to move plasma torches (which heat the surface of molten metal in the casting mold) one time. The average heat input amount at multiple sites, which are obtained by dividing the initial solidification portion (which is where the molten metal makes contact with the casting mold and first solidifies) into multiple sites in the circumferential direction of the casting mold, is 1.0-2.0 MW/m2. The molten metal advection time, which is the time required for electromagnetically stirred molten metal to travel the length of the torch heating region of the surface of the molten metal in the lengthwise direction of the casting mold, is 3.5 seconds or less.

公开(公告)号：US09895744B2

公开(公告)日：2018-02-20

申请号：US14401107

申请日：2013-05-16

Applicant: Almex USA, Inc.

Inventor： Ravindra V. Tilak ,  Rodney W. Wirtz ,  Ronald M. Streigle

IPC: B22D11/049 ,  B22D11/14 ,  B22D27/04 ,  B22D11/00 ,  B22D7/00 ,  B22D11/16 ,  B22D11/18 ,  B22D27/00 ,  B22D30/00 ,  B22D46/00 ,  C22C21/00

CPC classification number: B22D27/04 ,  B22D7/005 ,  B22D11/003 ,  B22D11/049 ,  B22D11/148 ,  B22D11/16 ,  B22D11/18 ,  B22D27/003 ,  B22D27/045 ,  B22D30/00 ,  B22D46/00 ,  C22C21/00

Abstract: A process in direct chill casting wherein molten metal is introduced into a casting mold and cooled by impingement of a liquid coolant on solidifying metal in a casting pit including a movable platen and an occurrence of a bleed-out or run-out is detected the process including exhausting generated gas from the casting pit; and introducing an inert gas into the casting pit, the inert gas having a density less than a density of air; reducing any flow of the liquid coolant.

公开(公告)号：US09889499B2

公开(公告)日：2018-02-13

申请号：US14914118

申请日：2013-08-26

Applicant: NISSHIN STEEL CO., LTD.

Inventor： Yuuki Honda ,  Hiroshi Morikawa

IPC: B22D11/106 ,  B22D11/111 ,  B22D11/00 ,  B22D31/00 ,  B22D11/11 ,  B22D11/117 ,  B22D11/041 ,  B22D27/00

CPC classification number: B22D11/002 ,  B22D11/041 ,  B22D11/106 ,  B22D11/11 ,  B22D11/111 ,  B22D11/117 ,  B22D27/003 ,  B22D31/002

Abstract: In a continuous casting apparatus 100 for casting a stainless steel billet 3c, a long nozzle 2 extending into a tundish 101 is provided at a ladle 1 for pouring a molten stainless steel 3 in the ladle 1 into the tundish 101. Further, a nitrogen gas 4 is supplied as a seal gas around the molten stainless steel 3 in the tundish 101, and continuous casting of the stainless steel billet 3c is performed, in which, while immersing the spout 2a of the long nozzle 2 into the molten stainless steel 3 in the tundish 101, the molten stainless steel 3 is poured through the long nozzle 2 into the tundish 101 and the molten stainless steel 3 in the tundish 101 is poured into a casting mold 105.

公开(公告)号：US20180021849A1

公开(公告)日：2018-01-25

申请号：US15676156

申请日：2017-08-14

Applicant: ERGOLINES LAB S.R.L.

Inventor： Stefano DE MONTE ,  Stefano SPAGNUL ,  Isabella MAZZA

IPC: B22D2/00 ,  B22D11/00

CPC classification number: B22D2/003 ,  B22D2/006 ,  B22D11/00 ,  B22D11/182 ,  B22D11/186 ,  B22D11/202 ,  B22D11/205 ,  G01F23/2961 ,  G01F23/2962 ,  G01F23/2968 ,  G01K13/02 ,  G01K2013/026

Abstract: Mould provided with a detection system of the level a liquid metal within a crystallizer of the mould in which the detection system is based on the transmission of at least one detection signal transmitted towards the crystallizer and a phase of reception of at least one received measuring signal dependent on the transmitted detection signal and mould and continuous casting machine provided with said mould.

公开(公告)号：US20180015534A1

公开(公告)日：2018-01-18

申请号：US15718005

申请日：2017-09-28

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

Inventor： Eisuke KUROSAWA ,  Takehiro NAKAOKA ,  Hideto OYAMA ,  Hidetaka KANAHASHI

IPC: B22D11/115 ,  B22D21/00 ,  B22D11/00 ,  B22D11/041 ,  H05H1/44 ,  F27D27/00

CPC classification number: B22D11/115 ,  B22D11/00 ,  B22D11/001 ,  B22D11/04 ,  B22D11/041 ,  B22D21/005 ,  B22D27/02 ,  F27D27/00 ,  H05H1/44

Abstract: In the present invention the torch movement period is 20-40 seconds, with the torch movement period being the time required to move plasma torches (which heat the surface of molten metal in the casting mold) one time. The average heat input amount at multiple sites, which are obtained by dividing the initial solidification portion (which is where the molten metal makes contact with the casting mold and first solidifies) into multiple sites in the circumferential direction of the casting mold, is 1.0-2.0 MW/m2. The molten metal advection time, which is the time required for electromagnetically stirred molten metal to travel the length of the torch heating region of the surface of the molten metal in the lengthwise direction of the casting mold, is 3.5 seconds or less.

公开(公告)号：US09869002B2

公开(公告)日：2018-01-16

申请号：US14962424

申请日：2015-12-08

Applicant: POSCO

Inventor： Sung Jin Park ,  Man Jin Ha ,  Dae Sung Lee

IPC: C21C7/06 ,  C21D3/04 ,  C22C38/58 ,  C22C38/42 ,  C22C38/02 ,  C22C38/00 ,  C21C5/00 ,  C21C7/00 ,  C21C7/064 ,  C21C7/068 ,  B22D11/00 ,  B22D11/06

CPC classification number: C21D3/04 ,  B22D11/002 ,  B22D11/0622 ,  C21C5/005 ,  C21C7/0075 ,  C21C7/0087 ,  C21C7/06 ,  C21C7/064 ,  C21C7/0685 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/42 ,  C22C38/58

Abstract: There is provided a method for manufacturing a duplex stainless steel sheet having reduced inclusions through argon oxygen decarburization (AOD), ladle treatment (LT), and twin roll strip casting. The method includes deoxidizing molten steel using silicon (Si) during the AOD, wherein the molten steel has a silicon (Si) content of 0.55 wt % to 0.75 wt % at the end of the AOD.

公开(公告)号：US09862030B2

公开(公告)日：2018-01-09

申请号：US13807909

申请日：2011-07-01

Applicant: Takuya Onimura ,  Shinya Tabata

Inventor： Takuya Onimura ,  Shinya Tabata

IPC: B22F9/08 ,  B22D11/00 ,  C21D6/00 ,  C22C1/04 ,  C22C38/00 ,  C22C38/10 ,  C22C38/16 ,  B22D11/06 ,  C22C33/02 ,  H01F1/057 ,  C22C38/06

CPC classification number: B22F9/08 ,  B22D11/001 ,  B22D11/0611 ,  B22F2998/10 ,  C21D6/00 ,  C21D2211/004 ,  C22C1/04 ,  C22C33/02 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0571 ,  B22F9/04 ,  B22F3/02 ,  B22F3/10

Abstract: Provided are alloy flakes for rare earth sintered magnet, which achieve a high rare earth component yield after pulverization with respect to before pulverization and a uniform particle size after pulverization, and a method for producing such alloy at high energy efficiency in an industrial scale. The method includes (A) preparing an alloy melt containing R composed of at least one element selected from rare earth metal elements including Y, B, and the balance M composed of Fe, or of Fe and at least one element selected from transition metal elements other than Fe, Si, and C, (B) rapidly cooling/solidifying the alloy melt to not lower than 700° C. and not higher than 1000° C. by strip casting with a cooling roll, and (C) heating and maintaining, in a particular temperature range, alloy flakes separated from the roll by rapid cooling and solidifying in step (B) before the flakes are cooled to not higher than 500° C., to obtain alloy flakes having a composition of 27.0 to 33.0 mass % R, 0.90 to 1.30 mass % boron, and the balance M.

公开(公告)号：US20170372823A1

公开(公告)日：2017-12-28

申请号：US15588584

申请日：2017-05-05

Applicant: Yantai Shougang Magnetic Materials, Inc.

Inventor： Kaihong Ding ,  Zhongjie Peng ,  Guohai Wang ,  Xiulei Chen

IPC: H01F1/057 ,  B22D11/00 ,  C22C38/10 ,  C22C38/06 ,  C22C38/00 ,  B22F9/04 ,  C21D6/00 ,  C22C38/14 ,  B22F3/04 ,  B22F3/16 ,  B22F3/24 ,  B22F9/02 ,  C22C38/16 ,  C21D9/00

CPC classification number: H01F1/0577 ,  B22D11/001 ,  B22F3/04 ,  B22F3/16 ,  B22F3/24 ,  B22F9/023 ,  B22F9/04 ,  B22F2003/248 ,  B22F2009/042 ,  B22F2009/044 ,  B22F2201/20 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  B22F2999/00 ,  C21D6/00 ,  C21D9/0068 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  C22C2202/02 ,  H01F41/0253 ,  B22F1/0059 ,  B22F3/087 ,  B22F3/14 ,  B22F2201/02 ,  B22F2201/11

Abstract: A sintered Nd—Fe—B magnet comprising at least one light rare earth element having a weight content between 31 wt. % and 35 wt. %, at least one heavy rare earth element having a weight content of no more than 0.2 wt. %, B having a weight content between 0.95 wt. % and 1.2 wt. %, at least one additive including Ti and having a weight content between 1.31 wt. % and 7.2 wt. %, Fe as a balance, and impurities including C, O, and N. Ti has a weight content between 0.3 wt. % and 1 wt. % and forms a Titanium-Iron-Boron phase with Fe and Boron B and being present in the sintered Nd—Fe—B magnet between 0.86 vol. % and 2.85 vol. %. The C, O, and N satisfy 630 ppm≦1.2C+0.6O+N≦3680 ppm. The sintered Nd—Fe—B magnet has a squareness factor of at least 0.95.

公开(公告)号：US20170355014A1

公开(公告)日：2017-12-14

申请号：US15621614

申请日：2017-06-13

Applicant: Golden Aluminum, Inc.

Inventor： Chris Michael Moellers

IPC: B22D11/14 ,  B22D11/18 ,  B22D11/00

CPC classification number: B22D11/143 ,  B22D11/003 ,  B22D11/004 ,  B22D11/18 ,  B22D11/185 ,  B22D11/186

Abstract: A method includes: replacing a first casting system component by a second casting component; sensing a position of the second casting component relative to at least one of a reference position and a third casting component; determining an adjustment amount and/or direction of the second casting system component; and providing the adjustment amount and/or direction to an operator for adjustment of the second casting system component and/or commanding that the second casting system component be adjusted by the adjustment amount and/or direction.

公开(公告)号：US20170333986A1

公开(公告)日：2017-11-23

申请号：US15598951

申请日：2017-05-18

Applicant: ArcelorMittal France

Inventor： Frederic BONNET ,  Olivier BOUAZIZ ,  Jean-Claude CHEVALLOT

IPC: B22D25/06 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  B22D11/00 ,  C21D8/02 ,  C21D7/00 ,  B32B15/01 ,  B23P17/04 ,  B22D11/06 ,  C22C38/14 ,  C22C38/00

CPC classification number: B22D25/06 ,  B22D11/001 ,  B22D11/0622 ,  B23P17/04 ,  B32B15/011 ,  C21D7/00 ,  C21D8/021 ,  C21D8/0215 ,  C21D8/0247 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  Y10T428/12965

Abstract: A steel plate, the chemical composition of which includes, the contents being expressed by weight: 0.010%≦C≦0.20%, 0.06%≦Mn≦3%, Si≦1.5%, 0.005%≦Al≦1.5%, S≦0.030%, P≦0.040%, 2.5%≦Ti≦7.2%, (0.45×Ti)−0.35%≦B≦(0.45×Ti)+0.70%, and optionally one or more elements chosen from: Ni≦1%, Mo≦1%, Cr≦31, Nb≦0.1%, V≦0.1%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting.