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1. 发明专利

JP2013151731A Structural high-strength thick steel plate excellent in property of preventing brittle crack propagation and production method thereof 有权
标题翻译：结构高强度厚钢板优良的预防脆性裂缝传播及其生产方法
公开(公告)号：JP2013151731A
公开(公告)日：2013-08-08
申请号：JP2012111157
申请日：2012-05-15
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： TAKEUCHI YOSHIKO , HASE KAZUKUNI , MITAO SHINJI , MURAKAMI YOSHIAKI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/14 , C22C38/58
CPC分类号： C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2201/05 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/18
摘要： PROBLEM TO BE SOLVED: To provide a structural high-strength thick steel plate being excellent in the property of preventing brittle crack propagation, having a thickness not less than 50 mm, and being suited for use in ships, and to provide a production method thereof.SOLUTION: A thick steel plate excellent in the property of preventing brittle crack propagation is characterized in that it has a specified component composition, its metallographic structure is a structure composed of mainly a ferrite phase, it has such a texture that the density in the RD//(110) plane in the plate thickness surface is not less than 1.3 and the density in the RD//(110) plane at the plate thickness center is not less than 1.8, the Charpy fracture surface transition temperature vTrs at the plate surface is -60°C or lower, and the Charpy fracture surface transition temperature vTrs at the plate thickness center is -50°C or lower.
摘要翻译：要解决的问题：提供一种厚度不小于50mm并且适用于船舶的脆性裂纹扩展性能优异的结构高强度厚钢板，并提供其制造方法。解决方案：防止脆性裂纹扩展性能优异的厚钢板的特征在于其具有特定的组分组成，其金相组织是主要由铁素体相组成的结构，其具有如下结构：板厚表面的RD //（110）面不小于1.3，板厚中心的RD //（110）面的密度不小于1.8，板上的夏比断裂面转变温度vTrs 表面为-60℃以下，板厚中心的夏比断裂面转变温度vTrs为-50℃以下。

2. 发明专利

JP2013151743A High strength thick steel plate excellent in toughness of high heat input welding part and brittle crack propagation stopping property, and method for producing the same 有权
标题翻译：高强度输入焊接部件的韧性高韧性厚钢板和脆性裂缝传播停止性能及其制造方法
公开(公告)号：JP2013151743A
公开(公告)日：2013-08-08
申请号：JP2012277531
申请日：2012-12-20
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： HASE KAZUKUNI , TAKEUCHI YOSHIKO , NISHIMURA KIMIHIRO , MITAO SHINJI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel plate excellent in toughness of a high heat input welding part and brittle crack propagation stopping properties, and to provide a method for producing the steel plate.SOLUTION: A high strength thick steel plate includes specific contents of C, Si, Mn, Al, P, S, Nb, Ti, N, Ca and B, wherein 0
摘要翻译：要解决的问题：提供一种高热输入焊接部的韧性优异的钢板和脆性裂纹扩展停止性，提供钢板的制造方法。解决方案：高强度厚钢板包括 C，Si，Mn，Al，P，S，Nb，Ti，N，Ca和B，其中0 <（Ca-（0.18 + 130×Ca）×O）/1.25/S <1和Ceq（= C + 根据需要，Mn / 6 +（Cu + Ni）/ 15 +（V + Mo + Cr）/ 5）分别为≥0.36％和<0.45％，以及一种或多种Cu，Ni，Cr，Mo和V ，其余为Fe和不可避免的杂质。高强度钢板具有如下结构：在与板钢板表面平行的平面中的（211）面的X射线强度比≥1.0，在包括中心的整个板厚的≥1/ 3的区域板厚的一部分，在板厚的中央部分的贝氏体分数为≥80％，板厚为1/4的部分的夏比断裂面转变温度为≤-40℃。

3. 发明专利

JP2013151732A Structural high-strength thick steel plate excellent in property of preventing brittle crack propagation and production method thereof 有权
标题翻译：结构高强度厚钢板优良的预防脆性裂缝传播及其生产方法
公开(公告)号：JP2013151732A
公开(公告)日：2013-08-08
申请号：JP2012111158
申请日：2012-05-15
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： TAKEUCHI YOSHIKO , HASE KAZUKUNI , MITAO SHINJI , MURAKAMI YOSHIAKI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/14 , C22C38/58
CPC分类号： C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2201/05 , C21D2211/002 , C22C38/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18
摘要： PROBLEM TO BE SOLVED: To provide a structural high-strength thick steel plate being excellent in the property of preventing brittle crack propagation, having a thickness of not less than 50 mm, and being suited for use in ships, and to provide a production method thereof.SOLUTION: A thick steel plate excellent in the property of preventing brittle crack propagation is characterized in that it has a metallographic structure composed of mainly bainite, it has such a texture that the density in the RD//(110) plane at the plate thickness center is not less than 1.5, the Charpy fracture surface transition temperatureTat the plate surface and at the plate thickness center is -40°C or lower, and more desirably, the Charpy fracture surface transition temperature and the density in the RD//(110) plane at the plate thickness center satisfy formula (1):T-12×I≤-70, whereinTis the fracture surface transition temperature (°C) at the plate thickness center and Iis the density in the RD//(110) plane at the plate thickness center.
摘要翻译：要解决的问题：提供厚度不小于50mm，适用于船舶的脆性裂纹扩展性优异的结构高强度厚钢板，提供制造方法其特征在于具有主要由贝氏体构成的金相组织，其结构使得RD //（110）面中的密度在板厚中心不小于1.5，板表面和板厚中心的夏氏断裂面转变温度为-40℃以下，更希望的是，夏比断裂面转变温度和RD //中的密度（110）面满足式（1）：T-12×I≤-70，其中为板厚中心处的断裂面转变温度（℃），I为RD //（110）中的密度）pl ane在板厚中心。

4. 发明专利

JP2014029019A Method for producing steel sheet for large heat input welding excellent in brittle crack arrest property 有权
标题翻译：用于生产用于大型热输入焊接的钢板的方法在脆性裂纹性能方面优异
公开(公告)号：JP2014029019A
公开(公告)日：2014-02-13
申请号：JP2013133850
申请日：2013-06-26
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： MURAKAMI YOSHIAKI , TAKEUCHI YOSHIKO , HASE KAZUKUNI , MITAO SHINJI , TSUYAMA AOSHI
IPC分类号： C21D8/02 , B21B3/00 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a thick steel plate having a sheet thickness of 40 mm or more, suitable for large heat input welding and excellent in brittle crack arrest properties.SOLUTION: A steel material contains specific amounts of C, Si, Mn, P, S, Al, Nb, Ti, N, B, Ca and the balance of Fe with inevitable impurities and has a Ceq expressed by expression (1) of 0.33 to 0.45, the mass% of Ca, S and O in the steel satisfying a specific expression and mass% of Ti, B and N in the steel satisfying another specific expression. The steel material is heated to 1,000°C or more, rolled at an austenite recrystallization region, subjected to accelerated cooling to a non-recrystallization temperature range, then rolled at cumulative rolling reduction of 40% or more at an austenite non-recrystallization temperature range, and is subjected to accelerated cooling from Artransformation point or more to a temperature range of 500°C or less. Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15 (1), each symbol of the elements is the content of the content (mass%) of each element.
摘要翻译：要解决的问题：提供一种板厚为40mm以上的厚钢板的制造方法，适用于大型热输入焊接，脆性断裂特性优异。解决方案：钢材含有特定量的C， Si，Mn，P，S，Al，Nb，Ti，N，B，Ca，余量由Fe和不可避免的杂质组成，Ceq表示的Ceq为0.33〜0.45，Ca，在满足另一具体表达式的钢中满足Ti，B和N的特定表示和质量％的钢中的O。将钢材加热至1000℃以上，在奥氏体再结晶区域进行轧制，进行加速冷却至非再结晶温度范围，然后在奥氏体未再结晶温度范围内以累积压下率为40％以上进行轧制，并且从Artransformation点或更高温度下进行500℃以下的加速冷却。 Ceq = C + Mn / 6 +（Cr + Mo + V）/ 5 +（Cu + Ni）/ 15（1），元素的每个符号是各元素含量（质量％）的含量。

5. 发明专利

PH12015501719A1 HIGH STRENGTH THICK STEEL PLATE FOR HIGH HEAT INPUT WELDING WITH EXCELLENT BRITTLE CRACK ARRESTABILITY AND MANUFACTURING METHOD THEREFOR 未知
公开(公告)号：PH12015501719A1
公开(公告)日：2015-11-09
申请号：PH12015501719
申请日：2015-08-04
申请人： JFE STEEL CORP
发明人： HASE KAZUKUNI , TAKEUCHI YOSHIKO , MITAO SHINJI
IPC分类号： C22C38/00 , C21D1/26 , C21D8/02 , C22C38/14 , C22C38/58
摘要： Provided are a high strength thick steel plate for high heat input welding, the plate of a preferred plate thickness of at least 50 mm being used for ships and having excellent brittle crack arrestability, and a manufacturing method therefor. A thick steel plate having a specific component composition, the main constituent of the metal structure being bainite, the thick steel plate having a texture in which the density in the RD//(110) plane at the plate thickness center is 1.5-4.0, and the Charpy fracture appearance transition temperature (vTrs) at the surface layer and the plate thickness center being no more than -40oC; and a manufacturing method therefor.

6. 发明公开

EP2799585A4 HIGH-STRENGTH THICK STEEL PLATE FOR CONSTRUCTION HAVING EXCELLENT CHARACTERISTICS FOR PREVENTING DIFFUSION OF BRITTLE CRACKS, AND PRODUCTION METHOD THEREFOR 有权
标题翻译：高强度厚钢板与优异的磁性能构建预防脆性破裂和过程的扩散用于生产
公开(公告)号：EP2799585A4
公开(公告)日：2015-01-14
申请号：EP12863931
申请日：2012-05-18
申请人： JFE STEEL CORP
发明人： TAKEUCHI YOSHIKO , HASE KAZUKUNI , MITAO SHINJI , MURAKAMI YOSHIAKI
IPC分类号： C22C38/14 , C21D8/02 , C22C38/58
CPC分类号： C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2201/05 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/18

7. 发明公开

EP2799584A4 HIGH-STRENGTH THICK STEEL PLATE FOR CONSTRUCTION HAVING EXCELLENT CHARACTERISTICS FOR PREVENTING DIFFUSION OF BRITTLE CRACKS, AND PRODUCTION METHOD THEREFOR 有权
标题翻译：高强度厚钢板与优异的磁性能构建预防脆性破裂和过程的扩散用于生产
公开(公告)号：EP2799584A4
公开(公告)日：2015-01-07
申请号：EP12863408
申请日：2012-05-18
申请人： JFE STEEL CORP
发明人： TAKEUCHI YOSHIKO , HASE KAZUKUNI , MITAO SHINJI , MURAKAMI YOSHIAKI
IPC分类号： C22C38/14 , C21D8/02 , C22C38/58
CPC分类号： C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2201/05 , C21D2211/002 , C22C38/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18
摘要： Provided is a high-strength thick steel plate for structural use having a thickness of 50 mm or more and excellent brittle crack arrestability which can be preferably used for ships and a method for manufacturing the steel plate. The steel plate with excellent brittle crack arrestability has a metallographic structure mainly including a bainite phase, a texture in which the integration degree I of the RD//(110) plane in a central portion in the thickness direction is 1.5 or more, and a Charpy fracture appearance transition temperature vTrs in a surface portion and the central portion in the thickness direction of -40°C or lower. Further, the steel plate preferably has the Charpy fracture appearance transition temperature and the integration degree I of the RD//(110) plane in the central portion in the thickness direction satisfying the relational expression (1) below: vTrs 1 / 2 �¢ t - 12 × I RD / / 110 �¢ 1 / 2 �¢ t ‰¤ - 70 where vTrs (1/2t) : fracture appearance transition temperature (°C) in the central portion in the thickness direction and I RD//(110) [1/2t] : integration degree of the RD//(110) plane in the central portion in the thickness direction.
摘要翻译：本发明提供一种高强度厚钢板的厚度为50mm以上和优良的脆性裂纹传播停止能力能够优选用于船舶和用于制造该钢板的方法结构用途。钢板具有优异的脆性裂纹传播停止能力具有金相结构主要包括贝氏体相，纹理在其中在在厚度方向上的中央部分的RD //（110）面的集成度I为1.5以上，和一个夏比断口转变临界温度vTrs在表面部分和在-40℃或更低的厚度方向的中央部。另外，钢板最好具有夏比断裂面转变温度和在厚度方向的中央部满足关系式（1）下面的RD //（110）面的集成度I：半转变温度vTrs¢ 吨 - 12×I RD / / 110¢¢1/2‰¤吨 - 70转变温度vTrs，其中（1 / 2T）：在厚度方向和RD //我的中央部断裂面转变温度（℃）（110）[1 / 2T]：在厚度方向的中央部的RD //（110）面的集成度。

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