STEEL SHEET FOR AN OIL SAND SLURRY PIPE HAVING EXCELLENT ABRASION RESISTANCE, CORROSION RESISTANCE AND LOW-TEMPERATURE TOUGHNESS AND METHOD FOR MANUFACTURING SAME

Title:

STEEL SHEET FOR AN OIL SAND SLURRY PIPE HAVING EXCELLENT ABRASION RESISTANCE, CORROSION RESISTANCE AND LOW-TEMPERATURE TOUGHNESS AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2012/087028

Kind Code:

A2

Abstract:

In one aspect of the present invention, a steel sheet for an oil sand slurry pipe with excellent abrasion resistance, corrosion resistance and low-temperature toughness is provided, wherein the steel sheet comprises, 0.2 to 0.35 weight % of C, 0.1 to 0.5 weight % of Si, 0.5 to 1.8 weight % of Mn, 0.1 to 0.6 weight % of Ni, 0.005 to 0.05 weight % of Nb, 0.005 to 0.02 weight % of Ti, 0.03 weight % or lower of P, 0.03 weight % or lower of S, 0.05 weight % or lower (but not 0%) of Al, 0.01 weight % or lower (but not 0%) of N, the remainder being Fe and unavoidable impurities. Steel components and microstructure of the steel sheet of the present invention are controlled to enable the steel sheet to be produced into a pipe and provide excellent abrasion resistance in a severe abrasion environment of an oil sand slurry pipe, improved corrosion resistance and excellent impact toughness at a low temperature. In addition, the steel sheet of the present invention provides remarkable economic benefits and production efficiency.

Inventors:

KOH SEONG-UNG (KR)
JUNG HWAN-GYO (KR)

Application Number:

PCT/KR2011/009943

Publication Date:

June 28, 2012

Filing Date:

December 21, 2011

Export Citation:

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Assignee:

POSCO (KR)
KOH SEONG-UNG (KR)
JUNG HWAN-GYO (KR)

International Classes:

C22C38/00; C21D8/02; C22C38/58

Foreign References:

KR870010217A	1987-11-30
KR20000046429A	2000-07-25
KR20010066189A	2001-07-11
KR20070017409A	2007-02-09
KR20000041284A	2000-07-15
KR20040059177A	2004-07-05

Other References: