公开(公告)号：US20210298320A1

公开(公告)日：2021-09-30

申请号：US17265309

申请日：2019-09-27

申请人： KOMATSUSEIKI KOSAKUSHO CO., LTD.

发明人： Takafumi Komatsu ,  Fumie Yusa

IPC分类号： A23C9/123 ,  B21B3/02 ,  C12N1/38 ,  C12N11/14

摘要： Provided is a metal material capable of optimizing a response of a fermentative microorganism, a method of controlling a response of a fermentative microorganism, and a method of producing a fermented food product. A metal material includes a crystal grain having an average crystal grain size for controlling a response of a fermentative microorganism. The average crystal grain size of the crystal grain is preferably 100 nm or more and 10 μm or less. The metal material is preferably stainless steel. It is preferable that the response of the fermentative microorganism is adsorption or growth of the fermentative microorganism on the metal material.

公开(公告)号：US20210214816A1

公开(公告)日：2021-07-15

申请号：US17217770

申请日：2021-03-30

申请人： ArcelorMittal

发明人： Sebastian Cobo ,  Juan David Puerta Velasquez ,  Martin Beauvais ,  Catherine Vinci

IPC分类号： C21D9/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C21D8/02 ,  C23C2/06 ,  C21D1/673 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C22C38/18 ,  C22C38/40 ,  C22C38/38 ,  C21D9/46 ,  B21D22/02 ,  C21D1/18 ,  C22C38/00 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23F17/00 ,  B21B3/02 ,  C21D1/06 ,  C21D8/00 ,  C22C38/12 ,  C22C38/14

摘要： The present invention provides fabrication methods for cold rolled, precoated and press hardened steel sheets, for which the chemical composition includes, with contents expressed by weight, 0.24%≤C≤0.38%, 0.40%≤Mn≤3%, 0.10%≤Si≤0.70%, 0.015%≤Al≤0.070%, 0%≤Cr≤2%, 0.25%≤Ni≤2%, 0.015%≤Ti≤0.10%, 0%≤Nb≤0.060%, 0.0005%≤B≤0.0040%, 0.003%≤N≤0.010%, 0.0001%≤S≤0.005%, 0.0001%≤P≤0.025%, it being understood that the titanium and nitrogen content satisfy: Ti/N>3.42, and that the carbon, manganese, chromium and silicon content satisfy: 2.6C+Mn/5.3+Cr/13+Si/15≥1.1%, with the chemical composition optionally including one or more of the following elements: 0.05%≤Mo≤0.65%, 0.001%≤W≤0.30%, 0.0005%≤Ca≤0.005%, with the remainder made up of iron and inevitable impurities coming from preparation.

公开(公告)号：US11028458B2

公开(公告)日：2021-06-08

申请号：US16481291

申请日：2017-01-27

申请人： NIPPON STEEL CORPORATION

发明人： Yuri Toda ,  Masafumi Azuma ,  Akihiro Uenishi ,  Eisaku Sakurada ,  Tatsuo Yokoi ,  Genichi Shigesato

IPC分类号： C21D9/46 ,  C22C38/42 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B32B15/01 ,  C21D8/02 ,  C21D6/00 ,  B21B3/02 ,  B21B1/02

摘要： When a zone surrounded by a grain boundary that is measured to be 5.0° or more by an EBSD analysis is assumed to be a grain, and when a K value is a value obtained by multiplying an average value of Image Qualities in a grain by 10−3, a Y value is an average crystal misorientation (°) in the grain, a metallic phase 1 is a metallic phase the K value of which is less than 4.000, a metallic phase 2 is a metallic phase the K value of which is 4.000 or more and the Y value of which is 0.5 to 1.0, a metallic phase 3 is a metallic phase the K value of which is 4.000 or more and the Y value of which is less than 0.5, and a metallic phase 4 is a metallic phase that falls under none of metallic phases 1 to 3, there is provided a steel sheet that has a predetermined chemical composition and includes a microstructure including, in area percent, a metallic phase 1: 1.0% or more and less than 35.0%, a metallic phase 2: 30.0% or more and 80.0% or less, a metallic phase 3: 5.0% or more and 50.0% or less, and a metallic phase 4: 5.0% or less. The steel sheet has a strength as high as 590 MPa or more (further, 780 MPa or more) in terms of tensile strength and has an excellent hole-expansion property.

公开(公告)号：US20210152111A1

公开(公告)日：2021-05-20

申请号：US17048633

申请日：2018-11-29

申请人： Hitachi Industrial Equipment Systems Co., Ltd.

发明人： Guangbin ZHOU ,  Yoshitaka IWAJI ,  Satoru KANEKO ,  Kazuaki TOBARI

IPC分类号： H02P21/16 ,  H02P5/74 ,  H02P21/22 ,  B21B3/02

摘要： An induction motor overheat monitoring method and device detects overheating of an induction motor from a detection value of a current sensor. A resistance calculation relationship data indicating a relationship between a resistance and a feature amount at the time of starting of the induction motor and a determination reference value for determining overheating are stored in advance. At each starting, a current of the induction motor is detected, a signal regarding a phase angle difference is calculated, and a feature amount of the motor is calculated from the signal regarding the phase angle difference. Further, a resistance of the induction motor is calculated by using the feature amount of the motor and the resistance calculation reference data stored in advance. Then, a temperature of the induction motor is calculated from the resistance of the induction motor, and it is determined if the motor is overheated.

公开(公告)号：US10894278B2

公开(公告)日：2021-01-19

申请号：US15883181

申请日：2018-01-30

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Masakazu Fujiwara

IPC分类号： B21B19/04 ,  B21B19/06 ,  B21B3/02 ,  B21B25/00 ,  B21B45/00

摘要： Provided is a round billet capable of reducing damage on a piercing plug in a method of producing a seamless metal tube with a Mannesmann process. The round billet (5), for use in a seamless metal tube, to be produced into a seamless metal tube with a Mannesmann process includes a body having a hole (6) formed in an axial direction of the body. The hole (6) includes an aperture (6a) opening at least at one end face of the round billet (5), and a tapered portion (61) continued to the aperture (6a) and having a diameter gradually increasing toward the aperture (6a).

公开(公告)号：US10597742B2

公开(公告)日：2020-03-24

申请号：US15310085

申请日：2015-04-15

申请人： Yanshan University

发明人： Yu hui Wang ,  Xiao xu Huang ,  Tian sheng Wang ,  Yan Peng ,  Yan ming He ,  Ya nan Zheng ,  Bo Liao

IPC分类号： B21B1/02 ,  B21B1/30 ,  B21C1/00 ,  B21C1/22 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C21D8/10 ,  C21D9/08 ,  C22C38/00 ,  C22C38/04 ,  B21B3/02 ,  C21D1/26 ,  B21B1/22

摘要： The present invention discloses a machining technology of a low-temperature high-strength-ductility high manganese steel, high manganese steel plate, and high manganese steel tube, and a high manganese steel comprises the following components in percentage by weight: Mn 30%-36%, C 0.02%-0.06%, S≤0.01%, P≤0.008% and the balance being Fe. Smelted steel ingots are subject to solution treatment and are rolled and homogenized to obtain a high manganese steel plate or are drawn to form a high manganese steel tube. The hot-rolled or cold-rolled steel plate after being hot-rolled has tremendous application value in the fields of low-temperature applications, such as the steel plate used for a low temperature pressure container.

公开(公告)号：US20190270127A1

公开(公告)日：2019-09-05

申请号：US16319254

申请日：2017-07-21

申请人： Hyundai Steel Company

发明人： Seung Han Cho ,  Ji Seong Hwang ,  Tae Kyung Kim ,  Hyun Soo Kim ,  Hyeong Jin Kim ,  Myung Soo Park ,  Young Soo Park ,  Ki Pyo Lee ,  Seung Ha Lee ,  Jong Hyob Lim ,  Jun Seok Lim ,  Hee Joong Lim

IPC分类号： B21B1/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B21B3/02

摘要： Embodiments include a method for manufacturing a hot-rolled coil and a method for correcting the shape of a hot-rolled coil. In one embodiment, the method for manufacturing the hot-rolled coil includes the steps of: reheating a steel slab comprising 0.18 to 0.56 wt % carbon (C), 0.1 to 0.5 wt % silicon (Si), 0.7 to 6.5 wt % manganese (Mn), more than 0 wt % but not more than 0.02 wt % phosphorus (P), more than 0 wt % but not more than 0.02 wt % sulfur (S), more than 0 wt % but not more than 0.3 wt % chromium (Cr), more than 0 wt % but not more than 0.004 wt % boron (B), 0.01 to 0.04 wt % titanium (Ti), and the remainder being iron (Fe) and other inevitable impurities; hot-rolling the steel slab at a finishing mill delivery temperature of 850° C. to 950° C., thereby forming a hot-rolled sheet; and cooling the hot-rolled sheet, followed by coiling at a coiling temperature of 700° C. or higher.

公开(公告)号：US20190024204A1

公开(公告)日：2019-01-24

申请号：US16142009

申请日：2018-09-26

申请人： ATI PROPERTIES LLC

发明人： Njall Stefansson ,  Ronald E. Bailey ,  Glenn J. Swiatek

IPC分类号： C21D9/42 ,  F41H5/04 ,  C22C38/44 ,  B21B1/00 ,  B21B1/02 ,  B21B1/04 ,  B21B1/22 ,  B21B1/24 ,  B21B1/26 ,  B21B1/46 ,  C22C38/08 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/50 ,  C21D8/02 ,  C21D7/13 ,  C21D7/04 ,  C21D1/18 ,  B32B15/18 ,  B32B15/04 ,  B32B15/01 ,  B23K35/02 ,  B23K20/227 ,  B23K20/08 ,  B21B3/02 ,  B21B3/00 ,  B23K103/04

摘要： A dual hardness steel article comprises a first air hardenable steel alloy having a first hardness metallurgically bonded to a second air hardenable steel alloy having a second hardness. A method of manufacturing a dual hard steel article comprises providing a first air hardenable steel alloy part comprising a first mating surface and having a first part hardness, and providing a second air hardenable steel alloy part comprising a second mating surface and having a second part hardness. The first air hardenable steel alloy part is metallurgically secured to the second air hardenable steel alloy part to form a metallurgically secured assembly, and the metallurgically secured assembly is hot rolled to provide a metallurgical bond between the first mating surface and the second mating surface.

公开(公告)号：US20180363087A1

公开(公告)日：2018-12-20

申请号：US15562986

申请日：2016-03-16

申请人： Nisshin Steel Co., Ltd.

发明人： Takafumi KAWAGOE ,  Junichi KATSUKI

IPC分类号： C21D9/46 ,  C22C38/58 ,  C22C38/42 ,  C22C38/44 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C21D1/76 ,  C23C8/10 ,  G11B33/14 ,  G11B33/02 ,  B21B3/02

摘要： In an austenitic stainless steel sheet, the arithmetic average roughness Ra is 0.2 μm or more and 1.2 μm or less. In addition, the dull pattern transfer rate on the steel sheet surface is 15% or more and 70% or less. Furthermore, micropits with a depth of 0.5 μm or more and an open area of 10 μm2 or more which are formed on the steel sheet surface have an existing density of 10.0 or less per 0.01 mm2 and an open area ratio of 1.0% or less. In addition, a film formed on the steel sheet surface is constituted from an oxide containing SiO2 as a main constituent, which oxide contains at least Si, N, Al, Mn, Cr, Fe, Nb, Ti and O as film-forming elements other than C, wherein the Si content is 10 at % or more, and the N content is 10 at % or less.

公开(公告)号：US10144986B2

公开(公告)日：2018-12-04

申请号：US14911709

申请日：2013-08-14

申请人： POSCO

发明人： Sung-Kyu Kim ,  Won-Tae Cho ,  Tai-Ho Kim ,  Kwang-Geun Chin ,  Sang-Ho Han

IPC分类号： C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C22C38/58 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/54 ,  C21D6/00 ,  B21B3/02 ,  C22C38/50 ,  C22C38/40

摘要： The present invention relates to an ultrahigh-strength steel sheet and a manufacturing method therefor. More specifically, the present invention can provide an ultra-high strength steel sheet which can ensure weldability and a delayed fracture resistance property by controlling the contents of elements affecting platability along with the contents of austenite-stabilizing elements and increasing twin formation through re-rolling, and simultaneously improve impact characteristics and workability by ensuring excellent yield strength and ductility.