Hyundai Motor Company

Samsung Electronics Co., Ltd.

Kia Motors Corporation

Kia Corporation

Sungkyunkwan University

Hyundai Steel Company

Seung-Hyun Hong

Min-Woo Kang

Jae-young Choi

Seung-hyun Baik

Won-young Kim

Sung-Chul Cha

Chung-An Lee

Soon-Woo Kwon

Moon-Ki Bae

Si-Yup Lee

Sang-Min Song

Soon-Jae Won

Shin-Woong Jeong

Jae-Yoon Hwang

Sang-hoon Lee

Won Mok Kim

Hyun-ki Kim

Young-Hee Lee

Young-hee Lee

Eun-sung Kim

Won-Young Kim

Dong-Hwi Kim

Dae-woo Suh

Seung-Hyun Baik

Young-Nam Kim

Young-Sang Ko

Ji-Hong Yoo

Jae-Young Choi

Disclosed is a method for manufacturing high-carbon bearing steel, which include: heating a billet at a temperature of about 950 to 1,050&#xb0; C. for about 70 to 120 minutes, rolling the billet to manufacture a wire rod, winding the wire rod to manufacture a wire rod coil, cooling the wire rod coil, and subsequently heat treating the wire rod coil for spheroidizing and carbonitriding, respectively. The bearing steel may include an amount of about 0.9 to 1.3 wt % of carbon (C), an amount of about 1.1 to 1.6 wt % of silicon (Si), an amount of about 1.0 to 1.5 wt % of manganese (Mn), an amount of about 1.5 to 1.9 wt % of chromium (Cr), an amount of about 0.2 to 0.6 wt % of nickel (Ni), an amount of about 0.1 to 0.3 wt % of molybdenum (Mo), and the balance iron (Fe) based on the total weight thereof.

Method for manufacturing high-carbon bearing steel and high-carbon bearing steel manufactured therefrom

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.

Copper alloy for laser cladding valve sheet

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 (H) by injecting the Hinto the inner space; and performing nitrification heat treatment for the component by injecting only ammonia (NH) 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 Hgas into an NHgas, thereby implementing the nitrification heat treatment of a quality similar to that of a conventional nitrification heat treatment for a short time.

Heat treatment method for a vehicle component

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.

High frequency heat treatment method of ultra-high strength parts

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.

Bearing steel having improved fatigue durability and method of manufacturing the same

A heat radiation-thermoelectric fin includes a thermoelectric inorganic material on a heterogeneous laminate of graphene. The heterogeneous laminate may be tube-shaped or plate-shaped, and a metal conductor may be coupled to one or more of the heterogeneous laminate. A thermoelectric module may be formed to include the fin, and a thermoelectric apparatus may include a heat supplier connected to the thermoelectric module.

Heat radiation-thermoelectric fin, and thermoelectric module and thermoelectric apparatus including the heat radiation-thermoelectric fin

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.

Carburized alloy steel having improved durability and method of manufacturing the same

A thermoelectric material includes a stack structure including alternately stacked first and second material layers. The first material layer may include a carbon nano-material. The second material layer may include a thermoelectric inorganic material. The first material layer may include a thermoelectric inorganic material in addition to the carbon nano-material. The carbon nano-material may include, for example, graphene. At least one of the first and second material layers may include a plurality of nanoparticles. The thermoelectric material may further include at least one conductor extending in an out-of-plane direction of the stack structure.

Thermoelectric material and thermoelectric device including the same

A heterogeneous laminate including: graphene; and a thermoelectric inorganic compound disposed on the graphene.

Heterogeneous laminate including graphene, and thermoelectric material, thermoelectric module, and thermoelectric apparatus including the heterogeneous laminate

Growing community of inventors

Seoul, South Korea

Seung-Hyun Hong