Posco

Posco Co., Ltd

Noroo Coil Coatings Co., Ltd.

Hongduk Industrial Co., Ltd.

Kiswire Ltd.

Jong-Sang Kim

Il-Ryoung Sohn

Tae-Chul Kim

Min-Suk Oh

Myung-Soo Kim

Bong-Hwan Yoo

Joong-Chul Park

Hyun-Chu Yun

Jin-Keun Oh

Yeol-Rae Cho

Sang-Heon Kim

Han-Gu Cho

Bong-Hoon Chung

Jong-Seog Lee

Yon-Kyun Song

Young-Ha Kim

Dae-Young Kang

Yong-Gyun Jung

Yang-Ho Choi

Joong-Kyu Kim

Ju-Youn Lee

Young-Jin Kwak

Tae-Yeob Kim

Hyeon-Seok Hwang

Kyoo-Young Lee

Ki-Cheol Kang

Kwang-Geun Chin

Jin-Tae Kim

Jung-Hwan Lee

Jung-Kuk Kim

Kyoung-Pil Ko

Sun-Ho Jeon

Jin Tae Kim

Chang-Hoon Choi

Ha-Na Choi

Hye Jin Yoo

Rho-Bum Park

Hye-Jin Yoo

Myoung-Hee Choi

Jung Su Kim

Chang Se Byeon

Yeon-Ho Kim

Jung Hwan Lee

Gab-Yong Kim

Bong-Woo Ha

Jae-Dong Cho

Sung-Joo Kim

Jong-Kook Kim

Jin Ho Jung

Bong Woo Ha

Woon-Jong Kim

Gwang-Weon Yu

Sung-Hoon Kang

Jong-Sung Kim

Sang-Tae Han

Kwang-Won Kim

Hyeon-seok Hwang

Tae-Kyo Han

A hot-dip galvanized steel sheet according to one aspect of the present invention comprises a base steel sheet and a hot-dip galvanized layer formed on the surface of the base steel sheet, wherein the difference between the average of the Mn/Si values of surface oxides present on a surface portion, which is the region from the interface between the hot-dip galvanized layer and the base steel sheet to a depth of 15 nm, and the average of the Mn/Si values of internal oxides, which are present in the region from the interface to a depth of 50-100 nm, can be 0.5 or more. Mn and Si of each oxide mean the amounts (wt %) of Mn and Si components in the oxide, which are measured by EDS, and the average of Mn/Si values means the averaged value of the Mn/Si values measured for each oxide.

High-strength hot-dip galvanized steel sheet having excellent surface quality and electric resistance spot weldability, and manufacturing method therefor

Provided is a hot press formed product, which is prepared by means of hot press forming of a Zn—Al—Mg-based plated steel material comprising base iron and a Zn—Al—Mg-based plated layer, and a method for preparing the same, the hot press formed product comprising an oxide layer formed on the surface thereof, wherein the content ratio of Al to Mg (Al/Mg) in the oxide layer is 0.8 or more.

Hot press formed product having excellent corrosion resistance and method for preparing same

The present invention relates to a plated steel sheet having excellent corrosion resistance, workability and surface quality, and at the same time, capable of reducing occurrence of liquid metal embrittlement (LME).

Plated steel sheet having excellent corrosion resistance, workability and surface quality and method for manufacturing same

Provided is a method of manufacturing a zinc-plated steel sheet. The method includes: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; and zinc plating the annealed steel sheet by dipping in a molten zinc plating bath. Further provided is a method of manufacturing a hot-press part including: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; zinc plating the annealed steel sheet by dipping in a molten zinc plating bath; heating the zinc-plated steel sheet; and press forming the heated steel sheet.

Zinc-plated steel sheet for hot pressing having outstanding surface characteristics, hot-pressed moulded parts obtained using the same, and a production method for the same

A plated steel wire, according to one aspect of the present invention, comprises: a base steel wire; and a zinc alloy plated layer. The zinc alloy plated layer comprises, in percentage by weight: 1.0% to 3.0% of Al; 1.0% to 2.0% of Mg; 0.5% to 5.0% of Fe; and the balance being Zn and unavoidable impurities, and includes a Zn/MgZn2/Al ternary eutectic structure, a Zn single-phase structure, and an Fe&#x2014;Zn&#x2014;Al-based crystal structure, wherein the Fe&#x2014;Zn&#x2014;Al-based crystal structure is formed adjacent to the base steel wire, and can have an average thickness of &#x2155; to &#xbd; with respect to an average thickness of the zinc alloy plated layer.

Plated steel wire and manufacturing method for the same

Provided are a hot-dip zinc plated steel material and a method for preparing same, the hot-dip zinc plated steel material comprising: base iron comprising 0.01-1.6 wt % of Si and 1.2-3.1 wt % of Mn; a Zn&#x2014;Al&#x2014;Mg alloy plating layer; and an Al-rich layer formed on the interface of the base iron and Zn&#x2014;Al&#x2014;Mg alloy plating layer, wherein the rate of occupied surface area of the Al-rich layer is 70% or higher (including 100%).

High-strength hot-dip zinc plated steel material having excellent plating properties and method for preparing same

Provided is a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more particularly, to a zinc alloy plated steel material having excellent corrosion resistance after being processed and a method for manufacturing the same.

Zinc alloy plated steel material having excellent corrosion resistance after being processed

Provided is a Zn&#x2014;Al&#x2014;Mg-based alloy-plated steel material that can be used in automobiles and home appliances and the like and, more particularly, to a Zn&#x2014;Al&#x2014;Mg-based alloy-plated steel material that can suppress the generation of cracks in a plating layer that are generated during processing.

Alloy-plated steel material having excellent crack resistance, and method for manufacturing same

Provided is an alloy-plated steel material that can be used in home appliances, automobiles, and construction materials and the like and, more particularly, to an alloy-plated steel material having excellent corrosion resistance and high surface quality.

Alloy-plated steel material having excellent corrosion resistance and high surface quality

Zn alloy plated steel material having excellent weldability and processed-part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.1-5.0%, Mg: 0.1-5.0%, as well as a remainder of Zn and inevitable impurities. The Zn alloy plated steel material includes a lower interface layer and an upper interface layer between the base steel material and the Zn alloy plating layer, wherein the lower interface layer is formed on the base steel material and has a dense structure, and the upper interface layer is formed on the lower interface layer and has a network-type or island-type structure.

Zinc alloy plated steel material having excellent weldability and processed-part corrosion resistance

Provided is a method of manufacturing a hot-dip galvanized steel sheet. According to an aspect of the present invention, the method may include preparing a base steel sheet, forming a iron (Fe)-plated layer on the prepared base steel sheet, oxidation heating the steel sheet having the Fe-plated layer formed thereon at a temperature ranging from 600&#xb0; C. to 800&#xb0; C., maintaining the heated steel sheet at a temperature ranging from 750&#xb0; C. to 900&#xb0; C. for 5 seconds or more in a reducing atmosphere with a dew point of between &#x2212;30&#xb0; C. to 5&#xb0; C. including 20 ppm or less of oxygen, 1 vol % to 20 vol % of H, and Nas well as unavoidable gases as a remainder, cooling the maintained steel sheet, and plating the cooled steel sheet by dipping in a hot-dip galvanizing bath.

High-strength hot-dip galvanized steel sheet having excellent plating surface quality and adhesion, and method of manufacturing the same

A plated steel material includes a plated layer containing, by wt %: 0.5 to 14% of Al, 0.5 to 5% of Mg, and the balance being Zn and inevitable impurities. The plated steel material satisfies the following Equation: ([Mg]&#x2212;[Mg])/[Mg]&#x2265;0.3. [Mg]means a content (wt %) of Mg in a surface of the plated layer, and [Mg]means a content (wt %) of Mg at a &#xbd;t position (t represents a thickness of the plated layer) from the surface of the plated layer in a thickness direction.

Plated steel material having excellent friction resistance and white rust resistance and method for preparing same

Zinc alloy plated steel material having excellent weldability and processed-part corrosion resistance and method of manufacturing same

A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt %, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remainder of Zn and inevitable impurities, and a cross-sectional structure of the Zn alloy plating layer includes, by area percentage, more than 50% of a Zn single phase structure and less than 50% of a Zn&#x2014;Al&#x2014;Mg-based intermetallic compound. A surface structure of the Zn alloy plating layer includes, by area percentage, 40% or less of a Zn single phase structure and 60% or more of a Zn&#x2014;Al&#x2014;Mg-based intermetallic compound.

Zn alloy plated steel sheet having excellent phosphatability and spot weldability and method for manufacturing same

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Gwangyang-si, South Korea

Jong-Sang Kim