Posco

Posco Co., Ltd

Sun-Ho Jeon

Myung-Soo Kim

Won-Tae Cho

Sang-Heon Kim

Jong-Sang Kim

Kwang-Geun Chin

Hyeon-Seok Hwang

Yon-Kyun Song

Sung-Kyu Kim

Bong-Hwan Yoo

Suk-Kyu Lee

Tae-Jin Song

Tai-Ho Kim

Ju-Youn Lee

Doo-Chan Chang

Jun-Seok Park

Moon-Hi Hong

Hyeon-seok Hwang

Provided is a hot-dip galvanized steel sheet used for an automobile outer panel and so forth and, more specifically, to a method for producing a hot-dip galvanized steel sheet having excellent press formability and clarity after painting, and to a hot-dip galvanized steel sheet produced by the method.

Method for producing hot-dip galvanized steel sheet having excellent press formability and image clarity after painting, and hot-dip galvanized steel sheet produced thereby

Disclosed are a hot-rolled galvanized steel sheet having excellent galling resistance and formability, and a method for manufacturing the same. The hot-rolled galvanized steel sheet, includes: a base steel; and a hot-rolled galvanizing layer formed on the surface of the base steel, wherein the hot-rolled galvanizing layer provides a hot-rolled galvanized steel sheet having a Mn crystallite having a size of 10 &#x3bc;m or less between the resin dendrites of zinc that form sequins.

Hot-rolled galvanized steel sheet having excellent galling resistance, formability and sealer-adhesion property and method for manufacturing same

The present invention relates to a high-strength and high-manganese steel sheet suitable for an outer panel or a vehicle body of a transport vehicle and, more specifically, to a high-strength and high-manganese steel sheet having excellent vibration-proof properties and a method for producing the same.

High manganese steel sheet having high strength and excellent vibration-proof properties and method for manufacturing same

There is provided a high-manganese steel with superior coating adhesion and a method of producing a hot-dip galvanized steel sheet from same. According to an aspect of the present disclosure, a high-manganese steel is characterized by including, by weight, C: 0.3-1%, Mn: 8-25%, Al: 1-8%, Si: 0.1-3.0%, Ti: 0.01-0.2%, Sn: 0.06-0.2%, B: 0.0005-0.01%, with the remainder being Fe and inevitable impurities. The present disclosure can provide a high-manganese and hot-dip galvanized steel sheet with superior surface quality as well as with high strength and workability by preventing coating failures that may be caused by manganese.

High-manganese steel with superior coating adhesion and method for manufacturing hot-dip galvanized steel from same

There are provided a method for manufacturing a high manganese hot-dip galvanized steel sheet having superior coatability and ultra-high strength, and a high manganese hot-dip galvanized steel sheet manufactured by the method. The method includes: cold rolling a hot-rolled steel sheet to form a cold-rolled steel sheet, the hot-rolled steel sheet including, by wt %, C: 0.3% to 1%, Mn: 8% to 25%, Si: 0.1% to 3%, Al: 0.01% to 8%, Cr: 0.1% to 2%, Ti: 0.01% to 0.2%, B: 0.0005% to 0.01%, Ni: 0.01% to 2%, Sn: 0.06% to 0.2%, and a balance of Fe and inevitable impurities; heating the cold-rolled steel sheet; cooling the heated steel sheet to, or maintaining the heated steel sheet; and performing a hot-dip galvanizing process on the cooled or temperature-maintained steel sheet by dipping the cooled or temperature-maintained steel sheet into a hot-dip galvanizing bath.

Method for manufacturing high manganese hot-dip galvanized steel sheet with excellent coatability and ultra-high strength, and high manganese hot-dip galvanized steel sheet manufactured by said method

A high-manganese hot-rolled galvanized steel sheet having no surface defects and improved galvanizing and alloying characteristics is manufactured by using a high-manganese hot-rolled steel sheet. Provided are the high-manganese hot-rolled galvanized steel sheet and a method of manufacturing the high-manganese hot-rolled galvanized steel sheet. The high-manganese hot-rolled galvanized steel sheet includes: a hot-rolled steel sheet including 5 wt % to 35 wt % manganese; and a zinc coating layer formed on the hot-rolled steel sheet, wherein an internal oxide layer is formed in an internal region of the hot-rolled steel sheet facing the zinc coating layer.

High-manganese hot-rolled galvanized steel sheet and manufacturing method thereof

Growing community of inventors

Gwangyang-si, South Korea

Sun-Ho Jeon