極低温靭性に優れた高強度鋼板及びその製造方法

Japanese Patent JP2014505170

A

According to one aspect of the present invention, provided is a high-strength steel sheet having superior toughness at cryogenic temperature, comprising, in weight percentage, 0.02 to 0.06% of C, 0.1 to 0.35% of Si, 1.0 to 1.6% of Mn, 0.02% or less (but not 0%) of Al, 0.7 to 2.0% of Ni, 0.4 to 0.9% of Cu, 0.003 to 0.015% of Ti, 0.003 to 0.02% of Nb, 0.01% or less of P, 0.005% or less of S, the remainder being Fe and unavoidable impurities, wherein the high-strength steel sheet satisfies the condition of [Mn]+5.4[Si]+26[Al]+32.8[Nb]<4.3 where [Mn], [Si], [Al], and [Nb] indicate contents of Mn, Si, Al, and Nb in weight percentage, respectively. The steel sheet of the present invention may secure toughness when as being applied to structural steel materials for ships, offshore structures, or the like, or steel materials for tanks storing and carrying liquefied gases, which are exposed to an extreme low temperature environment.

JP3606461	Manufacturing method of thin plate for shadow mask with excellent etching uniformity
JPH0445247	ULTRA-MICROCRYSTALLINE ALLOY EXCELLENT IN CORROSION RESISTANCE
JP3790087	HIGH STRENGTH HOT ROLLED STEEL SHEET EXCELLENT IN WORKABILITY

Kim, u-gyeom
Kim, San-ho
Van, Ki-Hyun
Su, In-Sik

JP2013547333A

February 27, 2014

December 27, 2011

Click for automatic bibliography generation  

POSCO

C22C38/00; C21D8/02; C22C38/16

JPH05202444A	1993-08-10
JP2002363644A	2002-12-18
JPS57123927A	1982-08-02
JP2002266022A	2002-09-18
JPH10168542A	1998-06-23
JP2000008123A	2000-01-11
JPS6415319A	1989-01-19
JPH059651A	1993-01-19
JPH08120338A	1996-05-14
JP2005320624A	2005-11-17
JPH08120338A	1996-05-14
JP2005320624A	2005-11-17
JPH05202444A	1993-08-10
JP2002363644A	2002-12-18
JPS57123927A	1982-08-02
JP2002266022A	2002-09-18
JPH10168542A	1998-06-23
JP2000008123A	2000-01-11
JPS6415319A	1989-01-19
JPH059651A	1993-01-19

Hidekazu Miyoshi
Masakazu Ito
Yuko Hara

Previous Patent: 溶銑製造装置及びそれを利用した溶銑の製造方法

Next Patent: Ｎｂ又はＴａの少なくとも一元素と他のＵ又は希土類元素の少なくとも一�...