公开(公告)号：US20240318276A1

公开(公告)日：2024-09-26

申请号：US18278386

申请日：2022-03-02

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Jun Zhang ,  Sixin Zhao ,  Jiaqiang Gao ,  Wei Wang

IPC: C21D9/32 ,  C21D1/32 ,  C21D1/84 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32

CPC classification number: C21D9/32 ,  C21D1/32 ,  C21D1/84 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C21D2211/005

Abstract: Disclosed is a cold forged gear steel. In addition to Fe and inevitable impurities, the cold forged gear steel further comprises the following chemical elements in mass percentage: 0.15-0.17% of C, 0.10-0.20% of Si, 1.0-1.10% of Mn, 0.80-0.90% of Cr and 0.02-0.04% of Al. Correspondingly, further disclosed is a manufacturing method for the cold forged gear steel, comprising the steps of: (1) smelting and casting; (2) heating; (3) forging or rolling; and (4) spheroidizing annealing: heating to and keeping at 750-770° C., then cooling with a cooling rate of 5-15° C./h to and keeping at 700-720° C., cooling with a cooling rate of 3-12° C./h to and keeping at 660-680° C., and cooling with a cooling rate of 5-20° C./h to 500° C. or below, and then tapping and cooling.

公开(公告)号：US20230318478A1

公开(公告)日：2023-10-05

申请号：US18126711

申请日：2023-03-27

Applicant: Neturen Co., Ltd.

Inventor： Masato Sugimoto ,  Hirotaka Tanaka ,  Yohei Masuda

IPC: H02M7/00 ,  H02M7/537 ,  H05B6/04 ,  H05B6/06 ,  C21D1/42 ,  C21D1/62 ,  C21D11/00

CPC classification number: H02M7/003 ,  H02M7/537 ,  H05B6/04 ,  H05B6/06 ,  C21D1/42 ,  C21D1/62 ,  C21D11/00 ,  C21D9/32

Abstract: Provided are a dual-frequency power-supply apparatus, a high-frequency heating apparatus, and a high-frequency quenching apparatus having a high durability.
A dual-frequency power-supply apparatus 1 includes a power supply 10 that alternately outputs a low-frequency current and a high-frequency current. The power supply 10 has an inverter 30 that converts a direct current into the low-frequency current and the high-frequency current and a controller 40 that controls the inverter 30. The controller 40 repeats, in this order, a first output period T11 in which the low-frequency current is output, a first intermission T12 in which output is stopped, a second output period T13 in which the high-frequency current is output, and a second intermission T14 in which output is stopped. The controller 40 sets the length of the first intermission T12 longer than a time Ta until the polarity of the output voltage of the power supply 10 is reversed fourthly after transition from the first output period T11 to the first intermission T12.

公开(公告)号：US11697859B2

公开(公告)日：2023-07-11

申请号：US16465086

申请日：2017-11-06

Applicant: HANGZHOU UNITED TOOLS CO., LTD. ,  HANGZHOU GREAT STAR INDUSTRIAL CO., LTD.

Inventor： Yueming Li

IPC: C21D9/32 ,  C21D9/00 ,  B25B7/02 ,  B25B13/46 ,  B25B15/04

CPC classification number: C21D9/32 ,  B25B7/02 ,  B25B13/462 ,  B25B15/04 ,  C21D9/0068

Abstract: The present invention discloses a method for manufacturing a manual tool, comprising: performing dual-frequency induction quenching on a first surface of a moment output part or a moment transmission part of the manual tool such that a quench-hardened layer is formed within a first depth range from the first surface of the moment output part to the interior of the moment output part or within a first depth range from the first surface of the moment transmission part to the interior of the moment transmission part, the hardness of the quench-hardened layer being higher than that of the body of the moment output part or the moment transmission part; the dual-frequency induction quenching being configured to simultaneously feed or introduce a high-frequency current and an intermediate-frequency current to the same induction coil to simultaneously heat the first surface of the moment output part or the first surface of the moment transmission part by the high-frequency current and the intermediate-frequency current, and then the moment output part or the moment transmission part being cooled and quenched. The present invention also discloses a manual tool manufactured by the above method. The manual tool subjected to double-frequency induction quenching according to the present invention has good abrasion resistance.

公开(公告)号：US20190194793A1

公开(公告)日：2019-06-27

申请号：US16210078

申请日：2018-12-05

Applicant: GE AVIO S.R.L.

Inventor： Lorenzo Rigo ,  Andrea Piazza ,  Diana Di Gioia

IPC: C23C8/38 ,  C23C8/02

CPC classification number: C23C8/38 ,  C21D1/06 ,  C21D9/32 ,  C22C38/44 ,  C22C38/52 ,  C23C8/02 ,  C23C8/34

Abstract: Methods for treating steel, along with the resulting treated steel, are provided. The method may comprise: nitriding a carburized Ferrium steel component such that the Ferrium steel component has a surface portion with a nitrogen content that is greater than 0% to about 5% by weight. Nitriding the Ferrium steel component may increase the surface hardness of the Ferrium steel. The surface portion may have a nitrogen content of about 0.05% to about 0.5% by weight.

公开(公告)号：US20180347025A1

公开(公告)日：2018-12-06

申请号：US15778153

申请日：2016-11-25

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Akira SHIGA ,  Hajime HASEGAWA ,  Manabu KUBOTA ,  Hideo MIZUKAMI

IPC: C23C8/22 ,  C23C8/32 ,  C23C8/80 ,  C21D9/32 ,  C21D9/28 ,  C21D8/00 ,  C21D1/06 ,  C22C38/54 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/20 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC classification number: C21D1/06 ,  C21D8/06 ,  C21D9/28 ,  C21D9/32 ,  C22C38/00 ,  C22C38/60 ,  C23C8/22 ,  C23C8/80

Abstract: A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, an AlN precipitation index IAlN ranges from greater than 0.00030 to smaller than 0.00110, a metallographic structure includes ferrite ranging from 85 to 100 area %, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 μm or greater to smaller than 2 μm, is shorter than 30.0 μm, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 μm or greater to smaller than 2 μm, is 300 pieces/mm2 or more.

公开(公告)号：US10053747B2

公开(公告)日：2018-08-21

申请号：US15124453

申请日：2015-03-11

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kenji Matsumoto

IPC: C22C30/00 ,  C21D9/32 ,  C21D7/06 ,  C23C8/32 ,  C21D1/06 ,  C21D1/78 ,  C23C8/80

CPC classification number: C21D9/32 ,  C21D1/06 ,  C21D1/785 ,  C21D7/06 ,  C23C8/32 ,  C23C8/80 ,  C23C28/044 ,  C23C28/046

Abstract: A surface of a steel material cut to a desired shape and carbonitrided is heated by excitation and thereafter repeatedly heated/cooled a predetermined number of times, such that an ultrafine crystal layer is formed immediately under the surface of the steel material and at least a predetermined number of cracks are formed under the formed ultrafine crystal layer, thereby enabling to increase toughness of the surface or immediately thereunder and enhance tenacity and inhibiting growth of cracks.

公开(公告)号：US20180202534A1

公开(公告)日：2018-07-19

申请号：US15407888

申请日：2017-01-17

Applicant: FORUM US, INC.

Inventor： Austin CHUNN ,  Wesley FREED ,  Mark C. DILLE

IPC: F16H57/00 ,  F16D1/076 ,  C21D9/32 ,  C21D9/08

CPC classification number: F16H57/0025 ,  C21D9/08 ,  C21D9/32 ,  F16C3/023 ,  F16D1/033

Abstract: A modular pinion shaft that includes a tubular member having a first end and a second end, a first pinion gear member secured to the first end by a plurality of fasteners, and a second pinion gear member secured to the first end by a plurality of fasteners. Gear teeth of each of the pinion gear members are aligned by one or more indexing members disposed between the tubular member and each pinion gear member.

公开(公告)号：US09994944B2

公开(公告)日：2018-06-12

申请号：US13880484

申请日：2011-10-19

Applicant: Hideki Imataka ,  Masayuki Horimoto ,  Yusuke Usui ,  Yuya Gyotoku

Inventor： Hideki Imataka ,  Masayuki Horimoto ,  Yusuke Usui ,  Yuya Gyotoku

IPC: C22C38/52 ,  C21D7/02 ,  C21D9/32 ,  C22C38/24 ,  C22C38/60 ,  C23C8/26 ,  C23C8/32 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/40 ,  C22C38/42 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/46 ,  C22C38/50

CPC classification number: C22C38/52 ,  C21D7/02 ,  C21D9/32 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/60 ,  C23C8/26 ,  C23C8/32 ,  Y10T428/12972

Abstract: A steel for cold forging/nitriding has, by mass percent, C: 0.01 to 0.15%, Si≤0.35%, Mn: 0.10 to 0.90%, P≤0.030%, S≤0.030%, Cr: 0.50 to 2.0%, V: 0.10 to 0.50%, Al: 0.01 to 0.10%, N≤0.0080%, and O≤0.0030%, further according to need a specific amount of one or more elements selected from Mo, Cu, Ni, Ti, Nb, Zr, Pb, Ca, Bi, Te, Se and Sb, with the balance being Fe and impurities, and further satisfying the conditions of [399×C+26×Si+123×Mn+30×Cr+32×Mo+19×V≤160], [20≤(669.3×logeC−1959.6×logeN−6983.3)×(0.067×Mo+0.147×V)≤80], [140×Cr+125×Al+235×V≥160] and [90≤511×C+33×Mn+56×Cu+15×Ni+36×Cr+5×Mo+134×V≤170] are excellent in cold forgeability and machinability after cold forging.

公开(公告)号：US09988704B2

公开(公告)日：2018-06-05

申请号：US15429819

申请日：2017-02-10

Applicant: DOWA THERMOTECH CO., LTD. ,  HONDA MOTOR CO., LTD.

Inventor： Yuichiro Shimizu ,  Atsushi Kobayashi ,  Susumu Maeda ,  Masao Kanayama ,  Kiyotaka Akimoto

IPC: C23C8/48 ,  C23C8/26 ,  C21D1/06 ,  C21D1/74 ,  C21D1/76 ,  C21D9/32 ,  C22C38/22 ,  C22C38/44 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C23C8/26 ,  C21D1/06 ,  C21D1/74 ,  C21D1/76 ,  C21D9/32 ,  C21D2201/05 ,  C21D2221/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/44

Abstract: A manufacturing method of a nitrided steel member and the nitrided steel member include: performing a nitriding treatment on a steel member made of a carbon steel or an alloy steel in an atmosphere of a nitriding treatment gas in which when the total pressure is set to 1, a partial pressure ratio of NH3 gas is set to 0.08 to 0.34, a partial pressure ratio of H2 gas is set to 0.54 to 0.82, and a partial pressure ratio of N2 gas is set to 0.09 to 0.18, at a flow speed of the nitriding treatment gas set to 1 m/s or more, at 500 to 620° C.; and thereby, forming an iron nitride compound layer having a thickness of 2 to 17 μm on a surface of the steel member.

公开(公告)号：US20180030562A1

公开(公告)日：2018-02-01

申请号：US15221993

申请日：2016-07-28

Applicant: THE GLEASON WORKS

Inventor： Arthur C. Reardon

IPC: C21D9/32 ,  C21D6/00 ,  B23K20/12 ,  C21D9/50

CPC classification number: C21D9/32 ,  B23K20/12 ,  C21D1/18 ,  C21D6/00 ,  C21D9/505

Abstract: A heat treatment process for a non-quench hardened steel article or friction-welded steel article including normalizing and annealing steps whereby uniformity of microstructure and hardness are significantly improved.