Posco

Steel & Convergence Technology Research Association

Posco Coated & Color Steel Co., Ltd.

Dae-Young Kang

Il-Ryoung Sohn

Myung-Soo Kim

Tae-Chul Kim

Jong-Sang Kim

Min-Suk Oh

Sung-Joo Kim

Heung-Yun Kim

Hyeon-Seok Hwang

Suk-Kyu Lee

Kwang-Tai Min

Yong-Joo Kim

Kyung-Kwan Park

Moon-Hi Hong

Tae-Yeul Park

A hot-dipped galvanized steel sheet of the present invention includes: a base steel sheet; a Zn—Mg—Al based plating layer provided on at least one surface of the base steel sheet and including, in wt %, with respect to components other than iron (Fe) diffused from the base steel sheet, 5.1 to 25% of Al and 4.0-10% of Mg, and the remainder of Zn and other inevitable impurities; and an interfacial alloy layer having a Fe—Al—Zn composition formed between the base steel sheet and the plating layer, wherein the interfacial alloy layer has a thickness of 0.5-2 μm and has a dendritic form, the Zn—Mg—Al based plating layer has a Zn—Al—MgZnternary eutectic structure, a Zn—MgZnbinary eutectic structure, and a structure including one or more of an Al single-phase structure having solid-solubilized Zn and a Zn single-phase structure, and agglomerated Al is included in a MgZnstructure.

Hot-dipped galvanized steel sheet having excellent bending workability and corrosion resistance and manufacturing method therefor

Provided are a plated steel sheet and a method for manufacturing same, the plated steel sheet comprising: a base steel sheet; a Zn—Mg—Al plating layer provided on at least one surface of the base steel sheet; and an Fe—Al inhibition layer provided between the base steel sheet and the Zn—Mg—Al plating layer. The plating layer comprises, by weight %, 4 to 10% of Mg and 5.1-25% of Al and the remainder being Zn and unavoidable impurities with respect to components not including iron (Fe) diffused from the base steel sheet. The plating layer comprises a 24-50% MgZnphase in phase fraction. In the MgZnphase, an Al single phase is present in the ratio of 1-30% relative to the cross-sectional area of the total MgZnphase.

Plated steel sheet having excellent corrosion resistance, galling resistance, workability and surface property

The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.

Aluminum-based alloy-plated steel sheet having excellent workability and corrosion resistance, and manufacturing method therefor

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

Growing community of inventors

Gwangyang-si, South Korea

Dae-Young Kang