公开(公告)号：US10060014B2

公开(公告)日：2018-08-28

申请号：US14918257

申请日：2015-10-20

申请人： Hyundai Motor Company

发明人： Sung-Chul Cha ,  Si-Yup Lee ,  Young-Sang Ko ,  Moon-Ki Bae ,  Seung-Hyun Hong

IPC分类号： C21D1/32 ,  C22C38/02 ,  C21D8/06 ,  C21D9/52 ,  C21D1/18

CPC分类号： C22C38/02 ,  C21D1/18 ,  C21D1/32 ,  C21D8/065 ,  C21D9/525

摘要： A bearing steel includes 1.0 to 1.3 wt % carbon; 0.9 to 1.6 wt % silicon; 0.5 to 1.0 wt % manganese; 1.5 to 2.5 wt % nickel; 1.5 to 2.5 wt % chromium; 0.2 to 0.5 wt % molybdenum; 0.01 to 0.06 wt % aluminum; 0.01 to 0.1 wt % copper; at least one selected from the group consisting of more than 0 wt % and less than 0.38 wt % vanadium and more than 0 wt % and less than 0.02 wt % niobium; and a balance of iron.

公开(公告)号：US09957595B2

公开(公告)日：2018-05-01

申请号：US14920766

申请日：2015-10-22

申请人： Hyundai Motor Company

发明人： Sung-Chul Cha ,  Moon-Ki Bae ,  Seung-Hyun Hong ,  Si-Yup Lee

IPC分类号： C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D1/58 ,  C23C8/22 ,  C23C8/80

CPC分类号： C22C38/54 ,  C21D1/58 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C8/22 ,  C23C8/80

摘要： A carburized alloy steel includes, based on a total weight of the carburized alloy steel, 0.1 to 0.35 wt % carbon, 0.1 to 2.0 wt % silicon, 0.1 to 1.5 wt % manganese, 1.5 to 3.0 wt % chromium, 0.2 to 0.5 wt % molybdenum, greater than 0 to 0.07 wt % niobium, and a balance of iron.

公开(公告)号：US11542573B2

公开(公告)日：2023-01-03

申请号：US16786063

申请日：2020-02-10

申请人： HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION

发明人： Min-Woo Kang ,  Soon-Woo Kwon ,  Chung-An Lee ,  Seung-Hyun Hong ,  Young-Nam Kim

IPC分类号： C22C9/06 ,  C22C30/02 ,  B23K26/352 ,  B23K26/34

摘要： A composition of a copper alloy for a laser cladding valve sheet is disclosed. The copper alloy includes a matrix structure and a hard phase, which includes 12 to 24 wt % of Ni, 2 to 4 wt % of Si, 8 to 30 wt % of Fe, more than 5 wt % and less than 10 wt % of Mo, 2 to 10 wt % of Al, and the balance Cu. The interfacial delamination may be suppressed in a fatigue environment by micronizing the hard phase and the distribution thereof, thereby improving fatigue resistance and wear resistance.

公开(公告)号：US11479842B2

公开(公告)日：2022-10-25

申请号：US17175384

申请日：2021-02-12

申请人： HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION

发明人： Dong-Hwi Kim ,  Soon-Woo Kwon ,  Chung-An Lee ,  Hyun-Ki Kim ,  Seung-Hyun Hong ,  Min-Woo Kang

IPC分类号： C23C8/26

摘要： A heat treatment method of a component for a vehicle includes: heating an inner space of a heat treatment furnace in which a component for a vehicle is disposed in the inner space; stabilizing hydrogen (H2) by injecting the H2 into the inner space; and performing nitrification heat treatment for the component by injecting only ammonia (NH3) into the inner space after the stabilizing. The heat treatment method may adjust the degree of vacuum and the flow rate instead of a Kn without additionally injecting the H2 gas into an NH3 gas, thereby implementing the nitrification heat treatment of a quality similar to that of a conventional nitrification heat treatment for a short time.

公开(公告)号：US20210115535A1

公开(公告)日：2021-04-22

申请号：US16786063

申请日：2020-02-10

申请人： HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION

发明人： Min-Woo Kang ,  Soon-Woo Kwon ,  Chung-An Lee ,  Seung-Hyun Hong ,  Young-Nam Kim

IPC分类号： C22C9/06

摘要： A composition of a copper alloy for a laser cladding valve sheet is disclosed. The copper alloy includes a matrix structure and a hard phase, which includes 12 to 24 wt % of Ni, 2 to 4 wt % of Si, 8 to 30 wt % of Fe, more than 5 wt % and less than 10 wt % of Mo, 2 to 10 wt % of Al, and the balance Cu. The interfacial delamination may be suppressed in a fatigue environment by micronizing the hard phase and the distribution thereof, thereby improving fatigue resistance and wear resistance.

公开(公告)号：US10240219B2

公开(公告)日：2019-03-26

申请号：US13715695

申请日：2012-12-14

申请人： Hyundai Motor Company

发明人： Seung-Hyun Hong ,  Ji-Hong Yoo

IPC分类号： C21D6/00 ,  C21D7/13 ,  C21D1/19 ,  C21D1/42 ,  C21D1/673 ,  C22C1/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04

摘要： Disclosed is a high frequency heat treatment method of hot-stamping-treated ultra-high strength parts, which comprises: a first step of heating the parts until the temperature of a heat treatment zone thereof becomes the AC3 transformation point or higher; a second step of maintaining the temperature until phase transformation of the heat treatment zone to austenite is completed; and a third step of cooling the heat treatment zone to transform the structure thereof to ferrite-pearlite. The present method improves the energy absorbing efficiency by increasing the parts' elongation ratio by locally forming a softening structure which absorbs energy.