continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6445/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :23/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "HIGH MN STEEL SHEET FOR HIGH CORROSION RESISTANCE AND METHOD OF
MANUFACTURING GALVANIZING THE STEEL SHEET"
(51) International classification :C23C 2/06 (71)Name of Applicant :
(31) Priority Document No :10-2005-0129212 1)POSCO
(32) Priority Date :24/12/2005
Address of Applicant :1 KOEDONG-DONG NAM-KU,
(33) Name of priority country :Republic of Korea POHANG, KYUNGSANGBOOK-DO 790-300, REPUBLIC OF
(86) International Application No :PCT/KR2006/005597 KOREA. Republic of Korea
Filing Date
:20/12/2006 (72)Name of Inventor :
(87) International Publication No :WO 2007/074994 1)SOHN, II-RYOUNG
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
2)CHIN, KWANG-GEUN
3)KIM, SEONG-JU
4)KIM, MYUNG-SOO
(62) Divisional to Application Number :NA
5)KIM, SUNG-KYU
Filing Date
:NA
(57) Abstract :
Disclosed herein are a high-manganese hot-dip coated steel sheet exhibiting high ductility and high strength, mainly used for inner and
outer panels of automobiles, and a method of manufacturing the same. The high-manganese hot-dip coated steel sheet includes a
substrate steel sheet having a composition of (in weight %) 0.1 to 1.5 % of C, 5 to 35 % of Mn, and the remainder including Fe and
other unavoidable impurities, and a hot-dip zinc coating layer formed on the substrate steel sheet, the hot-dip zinc coating layer
containing only Zn, or an alloying hot-dip coating layer formed on the substrate steel sheet, the alloying hot-dip coating layer having a
composition of (in weight %) 0.1 to 10 % of AAn, 5 to 15 % of Fe, and the remainder including Zn and other unavoidable impurities.
Consequently, the hot-dip coated steel sheet according to the present invention exhibits high corrosion resistance as well as high
strength and high ductility.
No. of Pages : 20 No. of Claims : 26
The Patent Office Journal 24/10/2008 26039