公开(公告)号：US20240011135A1

公开(公告)日：2024-01-11

申请号：US18008518

申请日：2021-06-11

申请人： UDDEHOLMS AB

发明人： Sebastian EJNERMARK ,  Anders KVARNED ,  Richard OLIVER

IPC分类号： C22C38/24 ,  C22C38/22 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C21D1/18 ,  C21D1/773 ,  C21D1/32 ,  C21D8/00 ,  C21D9/00

CPC分类号： C22C38/24 ,  C22C38/22 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C21D1/18 ,  C21D1/773 ,  C21D1/32 ,  C21D8/005 ,  C21D9/0068 ,  C21D2211/001

摘要： A matrix type hot work tool steel, in use, has an improved abrasive wear resistance in demanding applications. The steel is suited for applications in hot forging, die casting or hot extrusion. It is also suitable for press hardening, in particular for press hardening of Advance High Strength Steel (AHSS) and has a high hot wear resistance. The hot work tool steel has a composition including, in weight % (wt. %): C 0.65-0.85; Si 0.03-0.8; Mn 0.1-1.8; Cr 4.5-6.6; Mo 1.8-3.5; V 1.3-2.3; Al≤0.1; N≤0.12; Ni≤1; W≤0.5; Co≤2; Cu≤1; Nb≤0.1; Ti≤0.05; Zr≤0.05; Ta≤0.05; B≤0.01; Ca≤0.01; Mg≤0.01; REM≤0.2; and balance Fe and impurities.

公开(公告)号：US11731180B2

公开(公告)日：2023-08-22

申请号：US17640356

申请日：2022-01-06

申请人： ZHEJIANG OCEAN UNIVERSITY

发明人： Baikang Zhu ,  Hengcong Tao ,  Le Zhang ,  Bo Ding

IPC分类号： B23P15/00 ,  B21C23/00 ,  C22C38/50 ,  C21D6/00 ,  C21D1/32

CPC分类号： B21C23/002 ,  C21D1/32 ,  C21D6/004 ,  C22C38/50

摘要： The present disclosure relates to the field of screw pump technologies, and in particular to a rotary mold extrusion molding process of a screw pump rotor. The rotary mold extrusion molding process of a screw pump rotor includes: performing isothermal spheroidizing annealing for a metal embryo material after treating the metal embryo material ultrasonically for 8˜30 s; performing cylindrical turning for the annealed metal embryo material and then performing sand-blasting, and soaking the metal embryo material in saponified oil for 10˜30 min for lubrication treatment, where the saponified oil contains a nano-silicon carbide of 0.5%˜8% which is a nano-silicon carbide mixture with particle sizes of 20˜60 nm and 140˜200 nm with a mixed weight ratio of 1:(2.8˜4); at room temperature, placing the metal embryo material into an extrusion cylinder to perform rotary mold extrusion molding so as to obtain a finished product.

公开(公告)号：US20230211398A1

公开(公告)日：2023-07-06

申请号：US17640356

申请日：2022-01-06

申请人： ZHEJIANG OCEAN UNIVERSITY

发明人： Baikang ZHU ,  Hengcong TAO ,  Le ZHANG ,  Bo DING

IPC分类号： B21C23/00 ,  C21D1/32 ,  C21D6/00 ,  C22C38/50

CPC分类号： B21C23/002 ,  C21D1/32 ,  C21D6/004 ,  C22C38/50

摘要： The present disclosure relates to the field of screw pump technologies, and in particular to a rotary mold extrusion molding process of a screw pump rotor. The rotary mold extrusion molding process of a screw pump rotor includes: performing isothermal spheroidizing annealing for a metal embryo material after treating the metal embryo material ultrasonically for 8˜30 s; performing cylindrical turning for the annealed metal embryo material and then performing sand-blasting, and soaking the metal embryo material in saponified oil for 10˜30 min for lubrication treatment, where the saponified oil contains a nano-silicon carbide of 0.5%˜8% which is a nano-silicon carbide mixture with particle sizes of 20˜60 nm and 140˜200 nm with a mixed weight ratio of 1:(2.8˜4); at room temperature, placing the metal embryo material into an extrusion cylinder to perform rotary mold extrusion molding so as to obtain a finished product.

公开(公告)号：US11085097B2

公开(公告)日：2021-08-10

申请号：US16327884

申请日：2017-08-31

申请人： Xi'an University of Technology

发明人： Yang Xu ,  Guojun Yan ,  Baojian Liu

IPC分类号： C21D9/40 ,  C21D1/32 ,  C22C37/06 ,  C22C37/10 ,  C22C37/08 ,  F16C33/66 ,  B22D11/14 ,  C21D1/20 ,  C22C33/08 ,  C22C37/04

摘要： A self-lubricating rolling bearing is provided. The chemical compositions in the inner rings and the outer rings of bearing are 3.4-3.7% C, 2.7-2.9% Si, 0.3-0.5% Mn, 0.3-0.5% Cr, ≤0.05% S, ≤0.05% P, 0.03-0.045% Residual Mg, and the remainder Fe. The total percent of the chemical compositions is 100%. The material for the inner and outer rings of the rolling bearing introduced in the invention is austempered ductile iron (ADI). In the microstructure of ADI, the diameter of the graphite nodules is less than 0.02 mm, the number of graphite spheres per square millimeter is more than 400, and the microstructure of the metal matrix in the ADI can be showed clearly only when it is observed on the microscope with a magnification more than 500. Eventually, the self-lubricating rolling bearings are made from the ADI.

公开(公告)号：US10988823B2

公开(公告)日：2021-04-27

申请号：US15936088

申请日：2018-03-26

申请人： DAIDO STEEL CO., LTD.

发明人： Masamichi Kawano

IPC分类号： C21D1/32 ,  C21D9/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/60 ,  C21D6/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/20 ,  C21D1/78 ,  C21D1/26

摘要： The present invention provides an annealed steel material having a composition containing, in mass %, 0.28≤C≤0.42, 0.01≤Si≤1.50, 0.20≤Mn≤1.20, 4.80≤Cr≤6.00, 0.80≤Mo≤3.20, 0.40≤V≤1.20, and 0.002≤N≤0.080, with the balance being Fe and unavoidable impurities; in which the annealed steel material has a cross-sectional size of a thickness of 200 mm or more and a width of 250 mm or more, and a hardness of 100 HRB or less; and in which a diameter of a largest ferritic grain observed in a microstructure is 120 μm or less in terms of a perfect circle equivalent, an area ratio of carbides is 3.0% or more and less than 10.5%, and an average particle diameter of the carbides is 0.18 μm or more and 0.29 μm or less.

公开(公告)号：US10967609B2

公开(公告)日：2021-04-06

申请号：US15925876

申请日：2018-03-20

申请人： HITACHI METALS, LTD.

发明人： Shinji Yamamoto

IPC分类号： B32B15/01 ,  B23K20/227 ,  B23K20/04 ,  H01M10/6554 ,  B21B3/00 ,  C21D1/26 ,  C21D1/32 ,  C22F1/08 ,  H01L23/36 ,  B32B15/20 ,  B32B15/04 ,  B32B15/18 ,  B32B37/10 ,  B32B38/00 ,  B23K103/04 ,  B23K103/12 ,  C22C38/44 ,  B23K103/16 ,  C22C38/02 ,  C22C38/04 ,  H01M10/653 ,  B21B1/38

摘要： A clad material includes a first layer made of stainless steel and a second layer made of Cu or a Cu alloy and roll-bonded to the first layer. In the clad material, a grain size of the second layer measured by a comparison method of JIS H 0501 is 0.150 mm or less.

公开(公告)号：US20210032737A1

公开(公告)日：2021-02-04

申请号：US17046064

申请日：2019-05-10

申请人： KOMATSU LTD.

发明人： Kensuke SATO ,  Koji YAMAMOTO ,  Yusuke HIRATSUKA ,  Kazuya HASHIMOTO

IPC分类号： C23C8/22 ,  C22C38/00 ,  C22C38/44 ,  C22C38/04 ,  C22C38/06 ,  C22C38/46 ,  C22C38/54 ,  C21D9/32 ,  C21D1/32 ,  C23C8/80 ,  C22C38/50 ,  C22C38/48 ,  C22C38/02

摘要： A machine component includes a core made up of a steel for machine structural use, and a medium carbon-containing layer and a high carbon-containing layer formed of the steel for machine structural use, the medium carbon-containing layer covering the core, the high carbon-containing layer covering the medium carbon-containing layer and having a carbon concentration of 0.8-1.5%. The high carbon-containing layer is made up of a martensitic structure having carbides dispersed therein and a residual austenitic structure, wherein spheroidized carbides with an aspect ratio of 1.5 or less constitute 90% or more of a total number of the carbides, and the number of spheroidized carbides on prior austenite grain boundaries is 40% or less of the total number of the carbides.

公开(公告)号：US10533242B2

公开(公告)日：2020-01-14

申请号：US15317898

申请日：2014-06-13

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Takahiko Kohtake ,  Kazuto Kawakami ,  Makoto Okonogi

IPC分类号： C22C38/44 ,  C21D1/32 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C21D8/06

摘要： A steel contains, in a chemical composition, C, Si, Mn, and Al, and contains pearlite as a metallographic structure, and a value obtained by dividing an Mn content in a cementite in the pearlite in terms of at % by an Mn content in a ferrite in the pearlite in terms of at % is higher than 0 and equal to or lower than 5.0.

公开(公告)号：US10077491B2

公开(公告)日：2018-09-18

申请号：US14370314

申请日：2012-12-26

申请人： JFE STEEL CORPORATION

发明人： Nobuyuki Nakamura ,  Takashi Kobayashi ,  Yoshimasa Funakawa

IPC分类号： C22C38/60 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C21D1/26 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/32 ,  C22C38/54 ,  C21D1/32

CPC分类号： C22C38/60 ,  C21D1/26 ,  C21D1/32 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/003 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C38/32 ,  C22C38/54 ,  Y02P10/212

摘要： A high carbon hot rolled steel sheet and a method for manufacturing the same are provided, wherein excellent cold workability and excellent hardenability are obtained stably. The high carbon hot rolled steel sheet has a composition containing C: 0.20% to 0.48%, Si: 0.1% or less, Mn: 0.5% or less, P: 0.03% or less, S: 0.01% or less, sol. Al: more than 0.10% and 1.0% or less, N: 0.005% or less, B: 0.0005% to 0.0050%, and the remainder composed of Fe and incidental impurities, on a percent by mass basis, and a microstructure composed of ferrite and cementite, wherein the average grain size of the above-described ferrite is 10 to 20 μm and the spheroidization ratio of the above-described cementite is 90% or more.

公开(公告)号：US09797045B2

公开(公告)日：2017-10-24

申请号：US13818047

申请日：2012-02-08

申请人： Manabu Kubota

发明人： Manabu Kubota

IPC分类号： C23C8/00 ,  C23C22/78 ,  C21D1/06 ,  C21D1/25 ,  C21D1/32 ,  C21D8/06 ,  C21D9/32 ,  C22C38/60 ,  C23C8/22 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54 ,  C23C8/02 ,  C23C8/32 ,  C23C8/80

CPC分类号： C23C22/78 ,  C21D1/06 ,  C21D1/25 ,  C21D1/32 ,  C21D8/005 ,  C21D8/06 ,  C21D9/32 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60 ,  C23C8/02 ,  C23C8/22 ,  C23C8/32 ,  C23C8/80

摘要： A steel for a carburizing and a carburized steel component having a steel portion and a carburized layer with a thickness of more than 0.4 mm to less than 2 mm which is formed on an outside of the steel portion. A chemical composition of the steel for the carburizing and the steel portion of the carburized steel component satisfies simultaneously equations of a hardness parameter, a hardenability parameter, and a TiC precipitation parameter.