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1. 发明授权

US08647564B2 High-strength steel sheet with excellent low temperature toughness and manufacturing thereof 有权
标题翻译：具有优异的低温韧性的高强度钢板及其制造方法
公开(公告)号：US08647564B2
公开(公告)日：2014-02-11
申请号：US12746073
申请日：2008-11-12
申请人： Seong Soo Ahn , Jang Yong Yoo , Ki Ho Kim , Choong Jae Park , Tae Woo Lee
发明人： Seong Soo Ahn , Jang Yong Yoo , Ki Ho Kim , Choong Jae Park , Tae Woo Lee
IPC分类号： C22C38/00 , C21D8/02
CPC分类号： C22C38/001 , C21D6/005 , C21D8/0205 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/06 , C22C38/12 , C22C38/14
摘要： There is provided a high-strength steel plate having acicular ferrite and bainite as a main microstructure and an austenite/martensite (M & A) as a second phase under the control of a cooling rate above the austenite transformation temperature. The high-strength steel plate comprises: carbon (C): 0.03 to 0.10 wt %, silicon (Si): 0.1 to 0.4 wt %, manganese (Mn): 1.8 wt % or less, nickel (Ni): 1.0 wt % or less, titanium (Ti): 0.005 to 0.03 wt %, niobium (Nb): 0.02 to 0.10 wt %, aluminum (Al): 0.01 to 0.05 wt %, calcium (Ca): 0.006 wt % or less, nitrogen (N): 0.001 to 0.006 wt %, phosphorus (P): 0.02 wt % or less, sulfur (S): 0.005 wt % or less, and the balance of iron (Fe) and other inevitable impurities. The method for manufacturing a high-strength steel plate may be useful to economically and effectively manufacture a high strength steel, which is able to secure excellent properties such as high strength and high toughness since the acicular ferrite and bainite may be effectively formed without adding expensive elements such as molybdenum (Mo).
摘要翻译：在奥氏体转变温度以上的冷却速度的控制下，提供了具有针状铁素体和贝氏体作为主要组织的高强度钢板和作为第二相的奥氏体/马氏体（M＆A）。高强度钢板包括：碳（C）：0.03〜0.10重量％，硅（Si）：0.1〜0.4重量％，锰（Mn）：1.8重量％以下，镍（Ni）：1.0重量％较少，钛（Ti）：0.005〜0.03重量％，铌（Nb）：0.02〜0.10重量％，铝（Al）：0.01〜0.05重量％，钙（Ca）：0.006重量％：0.001〜0.006重量％，磷（P）：0.02重量％以下，硫（S）：0.005重量％以下，余量由铁（Fe）等不可避免的杂质构成。制造高强度钢板的方法可有效地经济有效地制造能够确保高强度和高韧性的优异性能的高强度钢，因为可以有效地形成针状铁素体和贝氏体而不增加昂贵的元素如钼（Mo）。

2. 发明申请

US20100258219A1 High-Strength Steel Sheet with Excellent Low Temperature Toughness and Manufacturing Method Thereof 有权
标题翻译：具有优良低温韧性的高强度钢板及其制造方法
公开(公告)号：US20100258219A1
公开(公告)日：2010-10-14
申请号：US12746073
申请日：2008-11-12
申请人： Seong Soo Ahn , Jang Yong Yoo , Ki Ho Kim , Choong Jae Park , Tae Woo Lee
发明人： Seong Soo Ahn , Jang Yong Yoo , Ki Ho Kim , Choong Jae Park , Tae Woo Lee
IPC分类号： C21D8/02 , C22C38/00
CPC分类号： C22C38/001 , C21D6/005 , C21D8/0205 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/06 , C22C38/12 , C22C38/14
摘要： There is provided a high-strength steel plate having acicular ferrite and bainite as a main microstructure and an austenite/martensite (M & A) as a second phase under the control of a cooling rate above the austenite transformation temperature. The high-strength steel plate comprises: carbon (C): 0.03 to 0.10 wt %, silicon (Si): 0.1 to 0.4 wt %, manganese (Mn): 1.8 wt % or less, nickel (Ni): 1.0 wt % or less, titanium (Ti): 0.005 to 0.03 wt %, niobium (Nb): 0.02 to 0.10 wt %, aluminum (Al): 0.01 to 0.05 wt %, calcium (Ca): 0.006 wt % or less, nitrogen (N): 0.001 to 0.006 wt %, phosphorus (P): 0.02 wt % or less, sulfur (S): 0.005 wt % or less, and the balance of iron (Fe) and other inevitable impurities. The method for manufacturing a high-strength steel plate may be useful to economically and effectively manufacture a high strength steel, which is able to secure excellent properties such as high strength and high toughness since the acicular ferrite and bainite may be effectively formed without adding expensive elements such as molybdenum (Mo).
摘要翻译：在奥氏体转变温度以上的冷却速度的控制下，提供了具有针状铁素体和贝氏体作为主要组织的高强度钢板和作为第二相的奥氏体/马氏体（M＆A）。高强度钢板包括：碳（C）：0.03〜0.10重量％，硅（Si）：0.1〜0.4重量％，锰（Mn）：1.8重量％以下，镍（Ni）：1.0重量％较少，钛（Ti）：0.005〜0.03重量％，铌（Nb）：0.02〜0.10重量％，铝（Al）：0.01〜0.05重量％，钙（Ca）：0.006重量％：0.001〜0.006重量％，磷（P）：0.02重量％以下，硫（S）：0.005重量％以下，余量由铁（Fe）等不可避免的杂质构成。制造高强度钢板的方法可有效地经济有效地制造能够确保高强度和高韧性的优异性能的高强度钢，因为可以有效地形成针状铁素体和贝氏体而不增加昂贵的元素如钼（Mo）。

3. 发明申请

US20100074794A1 STEEL PLATE FOR LINEPIPE HAVING ULTRA-HIGH STRENGTH AND EXCELLENT LOW TEMPERATURE TOUGHNESS AND MANUFACTURING METHOD OF THE SAME 审中-公开
标题翻译：具有超强度和极好的低温韧性的钢板和其制造方法
公开(公告)号：US20100074794A1
公开(公告)日：2010-03-25
申请号：US12447666
申请日：2007-11-02
申请人： Seong Soo Ahn , Jang Yong Yoo , Sang Hyun Cho
发明人： Seong Soo Ahn , Jang Yong Yoo , Sang Hyun Cho
IPC分类号： C22C38/42 , B21B27/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , C21D8/02
CPC分类号： C21D8/0263 , C22C38/02 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58
摘要： A steel plate for linepipes having ultra-high strength and excellent low temperature toughness, and a method for manufacturing the same are disclosed. The steel plate has a strength of 930 MPa or more and excellent toughness even with much smaller amounts of alloying elements than that of conventional steel plates, and a method for manufacturing the same. The steel includes by weight %: 0.03˜0.10% C; 0˜0.6% Si; 1.6-2.1% Mn; 0˜1.0% Cu; 0-1.0% Ni; 0.02-0.06% Nb; 0-0.1% V; 0.1-0.5% Mo; 0-1.0% Cr; 0.005-0.03% Ti; 0.01-0.06% Al; 0.0005-0.0025% B; 0.001-0.006% N; 0-0.006% Ca; 0.02% or less P; 0.005% or less S; and the balance Fe and unavoidable impurities. The microstructure includes at least about 75 area percent of a mixture of bainitic ferrite and acicular ferrite.
摘要翻译：公开了一种具有超高强度和优异的低温韧性的线管的钢板及其制造方法。该钢板的强度为930MPa以上，并且即使与常规钢板相比，合金元素的量少得多，也具有优异的韧性及其制造方法。钢包括重量％：0.03〜0.10％C; 0〜0.6％Si; 1.6-2.1％Mn; 0〜1.0％Cu; 0-1.0％Ni; 0.02-0.06％Nb; 0-0.1％V; 0.1-0.5％Mo; 0-1.0％Cr; 0.005-0.03％Ti; 0.01-0.06％Al; 0.0005-0.0025％B; 0.001-0.006％N; 0-0.006％Ca; 0.02％以下P; 0.005％以下S; 余量为Fe和不可避免的杂质。微结构包括至少约75面积百分比的贝氏体铁素体和针状铁素体的混合物。

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