公开(公告)号：US20220170125A1

公开(公告)日：2022-06-02

申请号：US17442986

申请日：2020-03-25

Applicant: NIPPON STEEL Stainless Steel Corporation

Inventor： Shota YAMASAKI ,  Kohji TAKANO ,  Akinori YOSHIZAWA ,  Hiroki MORITA

IPC: C21D8/06 ,  C21D9/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54

Abstract: A bar-shaped steel product extends unidirectionally and has a chemical composition including, by mass %, 0.001 to 0.20% of C, 0.01 to 3.0% of Si, 0.01 to 2.0% of Mn, 0.01 to 5.0% of Ni, 7.0 to 35.0% of Cr, 0.01 to 5.0% of Mo, 0.01 to 3.0% of Cu, 0.001 to 0.10% of N, 0.2 to 2.0% of Nb, optional element(s), and a balance consisting of Fe and inevitable impurities, and has 0.5 or less of a rolling-direction-crystal-orientation RD// fraction (an area ratio of crystal having 20 degrees or less of an orientation difference between a orientation and a rolling direction).

公开(公告)号：US11338550B2

公开(公告)日：2022-05-24

申请号：US16979820

申请日：2018-03-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei Tokuda ,  Takuya Mitsunobu ,  Akihiro Sengoku ,  Kenichiro Matsumura

IPC: B32B15/01 ,  C22C38/32 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C30/02 ,  C22C30/06 ,  C22C18/04 ,  C23C2/12 ,  C23C2/06 ,  C23C2/28 ,  B21D22/02 ,  C23C28/02 ,  C21D1/673 ,  C21D1/76 ,  C22C21/10 ,  C22C30/00 ,  C22C18/00 ,  B21D22/20 ,  C22C21/00 ,  C23C18/04 ,  B32B15/18 ,  B32B15/04 ,  B32B15/20 ,  C23C30/00 ,  C23C28/00 ,  C23C8/12 ,  C21D8/00 ,  C21D9/00 ,  C21D1/18 ,  C21D1/34 ,  C21D1/40

Abstract: There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting MgZn2 phases and insular FeAl2 phases, is located on the interface layer, and has a thickness of 3 μm to 40 μm.

公开(公告)号：US11331710B2

公开(公告)日：2022-05-17

申请号：US16080096

申请日：2017-02-23

Applicant: BENTELER AUTOMOBILTECHNIK GMBH ,  BENTELER MASCHINENBAU GMBH

Inventor： Christian Hielscher ,  Simon Werneke ,  Stefan Horn ,  Borek Dvorak ,  Radovan Kout ,  Martin Schaele

IPC: B21D22/02 ,  B21D35/00 ,  B21D37/16 ,  C21D1/673 ,  B21D22/20 ,  B21D53/88 ,  C21D1/20 ,  C21D9/00 ,  C21D11/00

Abstract: A method for producing a motor vehicle component with at least two regions of different strengths and a protective layer, consisting of the following process steps: —providing precoated blanks made of a steel alloy, which can be hardened, —homogeneously heating to a heating temperature, which is at least greater than or equal to the AC1 temperature, preferably greater than or equal to the AC3 temperature, —holding the heating temperature, so that the precoating alloys with the blank, —homogeneously intercooling the alloyed blank to an intercooling temperature between 450 deg. C. and 700 deg. C., partially heating the blank from the intercooling temperature to at least the AC3 temperature in regions of the first type and holding regions of the second type at substantially intercooling temperature, —hot forming and press hardening the partially tempered blank so as to form the motor vehicle component, wherein a tensile strength of greater than 1400 MPa is produced in regions of the first type, a tensile strength of less than 1050 MPa is produced in regions of the second type, and a transition region is produced between said regions.

公开(公告)号：US20220135156A1

公开(公告)日：2022-05-05

申请号：US16949593

申请日：2020-11-05

Applicant: Caterpillar Inc.

Inventor： Benjamin JONES ,  Scott H. MAGNER

IPC: B62D55/20 ,  C21D1/18 ,  C21D9/00 ,  C21D1/10

Abstract: A track pad may include a base member and a roller path member extending from the base member. The roller path member may include a roller path surface for engaging with a roller of a machine. The roller path member may include a leading side and a trailing side in a direction of travel of the machine. The roller path member may include a hardened region that extends from the roller path surface and a body region adjacent the hardened region. The hardened region may have a greater hardness than the body region. The hardened region may have a uniform depth from the leading side to the trailing side of the roller path member.

公开(公告)号：US20220135143A1

公开(公告)日：2022-05-05

申请号：US17431291

申请日：2020-03-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahiko ABE ,  Hiroaki KUBOTA ,  Daisuke MAEDA ,  Yuri TODA

IPC: B62D29/00 ,  B21D22/20 ,  B21D53/88 ,  C21D9/00

Abstract: This vehicle body structure includes a frame member with a first top section, a corner section, a vertical wall section, and a second top section, and a first support section and a second support section provided at the second top section. L/h≤6.7 is satisfied where the h represents a length between an outer surface of the first top section and an outer surface of the second top section, and the L represents a length between the first support section and the second support section.

公开(公告)号：US11306595B2

公开(公告)日：2022-04-19

申请号：US16131451

申请日：2018-09-14

Applicant: United Technologies Corporation

Inventor： Dilip M. Shah ,  Alan D. Cetel ,  Venkatarama K. Seetharaman

IPC: B23P15/02 ,  F01D5/14 ,  B21J5/00 ,  B21J5/02 ,  C21D9/00 ,  C22F1/10 ,  F01D5/30

Abstract: A method for manufacturing a blade, the method includes casting a nickel alloy blade precursor having an airfoil and a root. The airfoil and the root are solution heat treating differently from each other. After the solution heat treating, the root is wrought processed. After the wrought processing, an exterior of the root is machined.

公开(公告)号：US11299798B2

公开(公告)日：2022-04-12

申请号：US16612400

申请日：2018-05-21

Applicant: JFE STEEL CORPORATION

Inventor： Yoshiko Takeuchi ,  Katsuyuki Ichimiya ,  Kazukuni Hase

IPC: C22C38/04 ,  C21D8/02 ,  C21D9/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/20

Abstract: Excellent CTOD properties for multilayer welding joint is provided for a steel plate. The steel plate comprises a specific chemical composition with Ceq of 0.45% or less where Ceq (%)=[C]+[Mn]/6+([Cu]+[Ni])/15+([Cr]+[Mo]+[V])/5 . . . (1) and Pcm of 0.22% or less where Pcm (%)=[C]+[Si]/30+([Mn]+[Cu]+[Cr])/20+[Ni]/60+[Mo]/15+[V]/10+5 [B] . . . (2); an average effective grain size of 20 μm or less at a mid-thickness part of the steel plate; and porosities having an equivalent circular diameter of 200 μm or more, the number of the porosities per mm2 being 0.1/mm2 or less.

公开(公告)号：US20220106660A1

公开(公告)日：2022-04-07

申请号：US17493484

申请日：2021-10-04

Applicant: HYUNDAI MOTOR COMPANY ,  KIA CORPORATION ,  SEOHAN INDUSTRY CO., LTD. ,  KOREA FLANGE CO., LTD

Inventor： Jeong Lyul Park ,  Wonkew Ban ,  Hyun Ho Yim ,  Chang-Gu Lee ,  Min-Gyu Kim

IPC: C21D9/40 ,  C21D1/42 ,  C21D9/00 ,  C21D1/18 ,  F16D3/205

Abstract: A method for manufacturing a trunnion for a constant velocity joint, the trunnion having a plurality of journal units provided outside around a hub unit, the method including a first step of manufacturing the trunnion, a second step of thermally treating a rounded outer circumferential surface of the journal unit, and a third step of thermally treating a connection unit disposed between the journal unit and the hub unit and having a diameter smaller than that of the journal unit.

公开(公告)号：US11293071B2

公开(公告)日：2022-04-05

申请号：US16561373

申请日：2019-09-05

Applicant: Koyo Thermo Systems Co., Ltd.

Inventor： Takahiro Nakamura ,  Hiroaki Tetsubayashi ,  Takeshi Ueda

IPC: C21D9/00 ,  F27B9/30 ,  F27B9/10

Abstract: Workpieces are disposed between a pair of side walls in a heat treatment chamber. A centrifugal fan is disposed to face the workpieces inside the heat treatment chamber, and sucks gas from the workpiece side and generates air current. In regions at the respective side wall sides relative to an intermediate position between the pair of side walls, an air current regulation unit regulates the air current so as to restrict flows of the air current from the centrifugal fan to the respective side wall sides when a rotary blade of the centrifugal fan rotates in regions in which outer circumferential edge portions of the rotating rotary blade separate from the respective side walls, and allows the flows in regions in which the outer circumferential edge portions of the rotating rotary blade approach the respective side walls.

公开(公告)号：US20220074034A1

公开(公告)日：2022-03-10

申请号：US17277005

申请日：2019-09-17

Applicant: EZM Edelstahlzieherei Mark GmbH

Inventor： Serosh Engineer

IPC: C22C38/54 ,  C22C38/44 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C21D9/00

Abstract: The invention makes a steel available, which, in the case of edge-layer hardening without subsequent relaxation annealing, not only has the potential for developing a hardened edge layer having a great surface hardness, in particular a surface hardness that amounts to more than 820 HV1, but rather also possesses a ductile, fine-grained grain structure and, at the same time, can be easily welded. For this purpose, a steel according to the invention consists of (in weight %) C: 0.10-0.19%, Si: ≤0.15%, Mn: ≤1.0%, P: ≤0.015%, S: ≤0.015%, Cr: 0.2-1.0%, Ni: 0.7-2.0%, Mo: 0.5-1.0%, N: ≤0.015%, Al: 0.010-0.060%, Cu: ≤0.20%, B: ≤0.005%, as well as optionally, in each instance, one or more elements from the group “W, Ti, Nb, V, Ta” in content values in accordance with the following stipulations: W: 0.15-0.65%, Ti: 0.01-0.04%, Nb: 0.015-0.05%, Ta: 0.01-0.04%, V: 0.04-0.12%, and, as the remainder, of iron and unavoidable contaminants.