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1.发明申请HIGH STRENGTH THICK-GAUGE STEEL PLATE SUPERIOR IN WELDABILITY AND HAVING TENSILE STRENGTH OF 780 MPA OR MORE AND METHOD OF PRODUCTION OF SAME 有权高强度厚度钢板超级电容器，具有780 MPA或更高的拉伸强度及其制造方法公开(公告)号：US20110041965A1
公开(公告)日：2011-02-24
申请号：US12867731
申请日：2009-10-22
CPC分类号： C22C38/04 , C21D8/02 , C21D9/50 , C21D2211/002 , C21D2211/003 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
摘要： The present invention provides high strength thick-gauge steel plate superior in weldability and having a tensile strength of 780 MPa or more and provides a method of production of the high strength thick-gauge steel plate by omitting tempering heat treatment in the production.The high strength thick-gauge steel plate of the present invention is high strength thick-gauge steel plate containing, by mass %, C: 0.030 to 0.055%, Mn: 2.4 to 3.5%, P: 0.01% or less, S: 0.0010% or less, Al: 0.06 to 0.10%, B: 0.0005 to 0.0020%, and N: 0.0015 to 0.0060%, having a weld cracking susceptibility parameter Pcm of 0.18% to 0.24%, and comprised mainly of martensite.The method of production of high strength thick-gauge steel plate of the present invention comprises heating a steel slab or cast slab having a predetermined composition of ingredients to 950 to 1100° C., rolling it at 820° C. or more, then starting accelerated cooling from 700° C. or more by a cooling rate of 8 to 80° C./sec and stopping the accelerated cooling at room temperature to 350° C.
摘要翻译： 本发明提供焊接性优异，拉伸强度为780MPa以上的高强度厚钢板，并且通过在制造中省略回火热处理，提供高强度厚钢板的制造方法。 本发明的高强度厚钢板是高强度厚钢板，以质量％计含有C：0.030〜0.055％，Mn：2.4〜3.5％，P：0.01％以下，S：0.0010 ％以下，Al：0.06〜0.10％，B：0.0005〜0.0020％，N：0.0015〜0.0060％，焊接开裂敏感性参数Pcm为0.18％〜0.24％，主要由马氏体组成。 本发明的高强度厚钢板的制造方法包括将具有规定的成分组成的钢坯或铸坯加热到950〜1100℃，在820℃以上滚动，然后起动 通过8〜80℃/秒的冷却速度从700℃以上进行加速冷却，并在室温下停止加速至350℃。
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2.发明授权High strength thick-gauge steel plate superior in weldability and having tensile strength of 780 MPA or more and method of production of same 有权焊接性优异，拉伸强度为780MPa以上的高强度粗钢板及其制造方法公开(公告)号：US08048367B2
公开(公告)日：2011-11-01
申请号：US12867731
申请日：2009-10-22
CPC分类号： C22C38/04 , C21D8/02 , C21D9/50 , C21D2211/002 , C21D2211/003 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
摘要： The present invention provides high strength thick-gauge steel plate superior in weldability and having a tensile strength of 780 MPa or more and provides a method of production of the high strength thick-gauge steel plate by omitting tempering heat treatment in the production. The high strength thick-gauge steel plate of the present invention is high strength thick-gauge steel plate containing, by mass %, C: 0.030 to 0.055%, Mn: 2.4 to 3.5%, P: 0.01% or less, S: 0.0010% or less, Al: 0.06 to 0.10%, B: 0.0005 to 0.0020%, and N: 0.0015 to 0.0060%, having a weld cracking susceptibility parameter Pcm of 0.18% to 0.24%, and comprised mainly of martensite. The method of production of high strength thick-gauge steel plate of the present invention comprises heating a steel slab or cast slab having a predetermined composition of ingredients to 950 to 1100° C., rolling it at 820° C. or more, then starting accelerated cooling from 700° C. or more by a cooling rate of 8 to 80° C./sec and stopping the accelerated cooling at room temperature to 350° C.
摘要翻译： 本发明提供焊接性优异，拉伸强度为780MPa以上的高强度厚钢板，并且通过在制造中省略回火热处理，提供高强度厚钢板的制造方法。 本发明的高强度厚钢板是高强度厚钢板，以质量％计含有C：0.030〜0.055％，Mn：2.4〜3.5％，P：0.01％以下，S：0.0010 ％以下，Al：0.06〜0.10％，B：0.0005〜0.0020％，N：0.0015〜0.0060％，焊接开裂敏感性参数Pcm为0.18％〜0.24％，主要由马氏体组成。 本发明的高强度厚钢板的制造方法包括将具有规定的成分组成的钢坯或铸坯加热到950〜1100℃，在820℃以上滚动，然后起动 通过8〜80℃/秒的冷却速度从700℃以上进行加速冷却，并在室温下停止加速至350℃。
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公开(公告)号：US20100108202A1
公开(公告)日：2010-05-06
申请号：US12450997
申请日：2009-03-31
CPC分类号： C22C38/06 , B21B1/38 , B21B45/0203 , C21D6/005 , C21D8/02 , C21D8/0226 , C21D8/0263 , C21D9/50 , C22C38/04
摘要： In a method of manufacturing a high tensile strength thick steel plate, a steel slab contains 0.03-0.055% of C, 3.0-3.5% of Mn, and 0.002-0.10% of Al, the amount of Mo is limited to 0.03% or less, the amount of Si is limited to 0.09% or less, the amount of V is limited to 0.01% or less, the amount of Ti is limited to 0.003% or less, the amount of B is limited to 0.0003% or less, and of which Pcm value representing a weld cracking parameter is fallen within the range of 0.20-0.24% and DI value representing a hardenability index is fallen within the range of 1.00-2.60, is heated to 950-1100° C. The steel slab is subjected to a rolling process with a cumulative draft of 70-90% when a temperature is in a range of 850° C. or more, and then, the steel slab is subjected to a rolling process at 780° C. or higher with a cumulative draft of 10-40% when a temperature is in a range of 780-830° C., and subsequently, accelerated cooling at a cooling rate of 8-80° C./sec is started from 700° C. or higher and is stopped at a temperature between room temperature and 350° C.
摘要翻译： 在制造高抗拉强度的厚钢板的方法中，钢坯含有0.03-0.055％的C，3.0-3.5％的Mn和0.002-0.10％的Al，Mo的量被限制在0.03％以下 ，Si的量限制在0.09％以下，V的量限制在0.01％以下，Ti的含量限定为0.003％以下，B的含量限定为0.0003％以下， 其中表示焊接裂纹参数的Pcm值落在0.20-0.24％的范围内，并且表示淬透性指数的DI值落在1.00-2.60的范围内，被加热到950-1100℃。钢坯经受 在温度在850℃以上的范围内，累积吃水量为70〜90％的轧制工序，然后将钢坯在780℃以上进行轧制，累积 当温度在780-830℃的范围内时，吸气量为10-40％，随后从700℃开始以8-80℃/秒的冷却速度加速冷却。 或更高，并在室温至350℃的温度下停止。
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公开(公告)号：US08043447B2
公开(公告)日：2011-10-25
申请号：US12450997
申请日：2009-03-31
IPC分类号： C21D8/00
CPC分类号： C22C38/06 , B21B1/38 , B21B45/0203 , C21D6/005 , C21D8/02 , C21D8/0226 , C21D8/0263 , C21D9/50 , C22C38/04
摘要： In a method of manufacturing a high tensile strength thick steel plate, a steel slab contains 0.03-0.055% of C, 3.0-3.5% of Mn, and 0.002-0.10% of Al, the amount of Mo is limited to 0.03% or less, the amount of Si is limited to 0.09% or less, the amount of V is limited to 0.01% or less, the amount of Ti is limited to 0.003% or less, the amount of B is limited to 0.0003% or less, and of which Pcm value representing a weld cracking parameter is fallen within the range of 0.20-0.24% and DI value representing a hardenability index is fallen within the range of 1.00-2.60, is heated to 950-1100° C. The steel slab is subjected to a rolling process with a cumulative draft of 70-90% when a temperature is in a range of 850° C. or more, and then, the steel slab is subjected to a rolling process at 780° C. or higher with a cumulative draft of 10-40% when a temperature is in a range of 780-830° C., and subsequently, accelerated cooling at a cooling rate of 8-80° C./sec is started from 700° C. or higher and is stopped at a temperature between room temperature and 350° C.
摘要翻译： 在制造高抗拉强度的厚钢板的方法中，钢坯含有0.03-0.055％的C，3.0-3.5％的Mn和0.002-0.10％的Al，Mo的量被限制在0.03％以下 ，Si的量限制在0.09％以下，V的量限制在0.01％以下，Ti的含量限定为0.003％以下，B的含量限定为0.0003％以下， 其中表示焊接裂纹参数的Pcm值落在0.20-0.24％的范围内，并且表示淬透性指数的DI值落在1.00-2.60的范围内，被加热到950-1100℃。钢坯经受 在温度在850℃以上的范围内，累积吃水量为70〜90％的轧制工序，然后将钢坯在780℃以上进行轧制，累积 当温度在780-830℃的范围内时，吸气量为10-40％，随后从700℃开始以8-80℃/秒的冷却速度加速冷却。 或更高，并在室温至350℃的温度下停止。
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5.发明申请High-Tensile Steel Plate of Low Acoustic Anisotropy and High Weldability Having Yield Stress of 450 MPa or Greater and Tensile Strength of 570 MPa or Greater, and Process for Producing the Same 有权屈服应力为450MPa以上，拉伸强度为570MPa以上的低声各向异性和高可焊性的高拉伸钢板及其制造方法公开(公告)号：US20090107591A1
公开(公告)日：2009-04-30
申请号：US12084502
申请日：2006-11-08
CPC分类号： B21B3/02 , C21D8/0205 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： A high-tensile steel plate of low acoustic anisotropy and high weldability having yield stress of 450 MPa or greater and tensile strength of 570 MPa or greater and a process for producing the steel plate are provided. The steel has an Si content of 0.10% or less, thereby achieving a volume ratio of island martensite of 3% or less, contains Nb≧0.025% and Ti≧0.005% so as to satisfy 0.045%≦[Nb]+2×[Ti]≦0.105%, contains Nb, Ti, C and N in ranges such that the value of A=([Nb]+2×[Ti])×([C]+[N]×12/14) is 0.0022 to 0.0055, and has a steel structure wherein bainite volume ratio is 30% or more and pearlite volume ratio is less than 5%.
摘要翻译： 提供具有450MPa以上的屈服应力和570MPa以上的拉伸强度的低声各向异性和高可焊性的高强度钢板以及钢板的制造方法。 钢的Si含量为0.10％以下，岛马氏体的体积比为3％以下，含有Nb≥0.025％，Ti> 0.005％，满足0.045％<= [Nb] + 在[A] = [[Nb] + 2×[Ti]）×（[C] + [N]×12/14）的值为2 / [Ti]≤0.105的范围内，含有Nb，Ti， 0.0022〜0.0055，贝氏体体积比为30％以上，珠光体积率小于5％的钢结构。
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6.发明授权High-tensile steel plate of low acoustic anisotropy and high weldability having yield stress of 450 MPa or greater and tensile strength of 570 MPa or greater, and process for producing the same 有权屈服应力为450MPa以上，拉伸强度为570MPa以上的低声各向异性，高可焊性的高强度钢板及其制造方法公开(公告)号：US08246768B2
公开(公告)日：2012-08-21
申请号：US12084502
申请日：2006-11-08
CPC分类号： B21B3/02 , C21D8/0205 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： A high-tensile steel plate of low acoustic anisotropy and high weldability having yield stress of 450 MPa or greater and tensile strength of 570 MPa or greater and a process for producing the steel plate are provided. The steel has an Si content of 0.10% or less, thereby achieving a volume ratio of island martensite of 3% or less, contains Nb≧0.025% and Ti≧0.005% so as to satisfy 0.045%≦[Nb]+2×[Ti]≦0.105%, contains Nb, Ti, C and N in ranges such that the value of A=([Nb]+2×[Ti])×([C]+[N]×12/14) is 0.0022 to 0.0055, and has a steel structure wherein bainite volume ratio is 30% or more and pearlite volume ratio is less than 5%.
摘要翻译： 提供具有450MPa以上的屈服应力和570MPa以上的拉伸强度的低声各向异性和高可焊性的高强度钢板以及钢板的制造方法。 钢的Si含量为0.10％以下，岛状马氏体的体积比为3％以下，含有Nb≥0.025％，Ti≥0.005％，满足0.045％＆lt; NlE; [Nb] + 2× 在[A]（[Nb] + 2×[Ti]）×（[C] + [N]×12/14）的范围内，含有Nb，Ti，C和N的Nb，Ti， 为0.0022〜0.0055，贝氏体体积率为30％以上，珠光体积率小于5％的钢结构。
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7.发明授权High toughness low yield ratio, high fatigue strength steel plate and process of producing same 失效高韧性低屈服比，高疲劳强度钢板及其生产方法
公开(公告)号：US5454883A
公开(公告)日：1995-10-03
申请号：US189379
申请日：1994-01-31
CPC分类号： C21D1/18 , C21D8/0263 , C21D2211/001 , C21D2211/002 , C21D2211/003 , C21D2211/005 , C21D2211/008 , C21D8/02
摘要： A steel plate having a high toughness, low yield ratio and high fatigue strength is provided by preserving the fine metallographical microstructure of martensite or bainite while austenitizing extremely fine portions of the microstructure, and during cooling, dispersing the portions as martensite, retained austenite, cementite or mixture thereof in a tempered martensite or tempered bainite phase.
摘要翻译： 通过保持马氏体或贝氏体的细金属组织，同时奥氏体化微观结构的极细部分，并且在冷却期间，将部分分散为马氏体，残留奥氏体，渗碳体，提供具有高韧性，低屈服比和高疲劳强度的钢板 或其混合物在回火马氏体或回火贝氏体相中。
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8.发明申请High Tension Steel Plate with Small Acoustic Anisotropy and with Excellent Weldability and Method of Production of Same 审中-公开具有小声各向异性和良好焊接性的高张力钢板及其制造方法公开(公告)号：US20080295920A1
公开(公告)日：2008-12-04
申请号：US11658334
申请日：2005-02-14
申请人： Tatsuya Kumagai , Masaaki Fujioka
发明人： Tatsuya Kumagai , Masaaki Fujioka
CPC分类号： C22C38/02 , B21B1/26 , B21B3/00 , B21B37/74 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D9/46 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： The present invention provides a high tension steel plate of a tensile strength of 570 MPa or more with a small acoustic anisotropy and with excellent weldability tensile strength and a method of production of steel plate predicated on the high productivity accelerated cooling stop process, which steel sheet is a high tension steel plate with a value of 0.045%≦Nb+2Ti≦0.105%, A=(Nb+2Ti)×(C+N×12/14) satisfying 0.0025 to 0.0055 and with a steel composition containing bainite in an amount of 30 vol % or more and pearlite+martensite-austenite constituent (MA) in an amount of less than 5 vol %. The steel is heated to 1200° C. or more, rough rolled at 1020° C. or more, then rolled at a cumulative reduction rate from over 920° C. to less than 1020° C. of 15% or less and a cumulative reduction rate from 860 to 920° C. of 20 to 50%, then starting accelerated cooling giving a cooling rate of 2 to 30° C./sec at 800° C. or more, stopping the accelerated cooling at 600 to 700° C., then cooling by 0.4° C./sec or less.
摘要翻译： 本发明提供一种拉伸强度为570MPa以上的高张力钢板，其具有小的各向异性和优异的焊接性拉伸强度，以及基于高生产率的加速冷却停止工艺的钢板的生产方法，该钢板 是具有0.045％<= Nb + 2Ti <= 0.105％的高张力钢板，满足0.0025〜0.0055的A =（Nb + 2Ti）×（C + N×12/14），并且含有贝氏体的钢组合物 30体积％以上的珠光体+马氏体 - 奥氏体组分（MA）的量少于5体积％。 将钢加热至1200℃以上，在1020℃以上进行粗轧，然后以累积压下率从920℃以上到低于1020℃，累积压下率为15％以下， 从860〜920℃的还原率为20〜50％，然后开始加速冷却，800℃以上的冷却速度为2〜30℃/秒，停止600〜700℃的加速冷却 然后冷却0.4℃/秒以下。
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公开(公告)号：US5389164A
公开(公告)日：1995-02-14
申请号：US192875
申请日：1994-02-07
CPC分类号： C21D8/0242 , B21B1/22 , B21B2015/0071 , C21D2211/005 , C21D8/0226
摘要： A steel containing predetermined components is rolled in a recrystallization temperature region or a non-recrystallization temperature region of an austenite and is subsequently subjected to repeated hot bending. Alternatively, a surface layer portion is cooled during rolling of the steel described above to an .alpha. single phase or a .gamma./.alpha. dual phase temperature region, rolling is then effected and is finished at the point of time when the surface temperature of the plate rises above an Ac.sub.3 point due to recuperative heat, and repeated bending is carried out. Still alternatively, the steel described above is rolled to a cumulative reduction ratio of at least 20% in the non-recrystallization temperature region and is then subjected to repeated bending. Further alternatively, the surface layer portion is cooled during hot rolling of the steel described above to an .alpha. single or .gamma./.alpha. dual phase temperature region, rolling is then continued at a cumulative reduction ratio of at least 20% and is finished at the point when the surface temperature of the steel plate rises less than (Ac.sub.3 point--200.degree. C.) due to recuperative heat, and subsequently, repeated bending is carried out.
摘要翻译： 含有预定组分的钢在奥氏体的再结晶温度区域或未再结晶温度区域中轧制，随后经受热重复弯曲。 或者，在将上述钢轧制期间将表面层部分冷却至α单相或γ/α双相温度区域，然后进行轧制，并在板的表面温度升高的时间点完成 由于回热而高于Ac3点，并且进行重复弯曲。 或者，将上述钢轧制至非再结晶温度区域的至少20％的累积压下率，然后进行反复弯曲。 或者，表面层部分在上述钢的热轧过程中被冷却到α单个或γ/α双相温度区域，然后以至少20％的累积压缩比继续轧制，并在该点 当由于回热而使钢板的表面温度升高小于（Ac3点-200℃）时，进行反复弯曲。
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公开(公告)号：US5357443A
公开(公告)日：1994-10-18
申请号：US978703
申请日：1993-02-03
申请人： Yoshiyuki Watanbe , Shinichi Shimomura , Atsuhiko Yoshie , Masaaki Fujioka , Kiyoshi Nishioka , Satoshi Akamatsu , Takashi Fujita
发明人： Yoshiyuki Watanbe , Shinichi Shimomura , Atsuhiko Yoshie , Masaaki Fujioka , Kiyoshi Nishioka , Satoshi Akamatsu , Takashi Fujita
CPC分类号： G01N33/20
摘要： A method of estimating the properties of a steel product, comprising completing a computation for determining metallurgical phenomena based on information concerning steel ingredients and production conditions in steps from casting to heat treatment to successively determine the state of a metallic structure and estimating the properties of a steel product from the final state of the metallic structure. More specifically, the method comprises the steps of: computing the temperature of a slab based on casting conditions and further completing a computation for the state of the metallic structure after casting based on information concerning the temperature of the slab and steel ingredients; completing a computation for the state of the metallic structure after rolling based on the state of the metallic structure before the rolling and the temperature of the steel product computed from rolling conditions; completing a computation for the state of the metallic structure after cooling based on the state of the metallic structure before the cooling and the temperature of the steel product computed from cooling conditions; and completing a computation for the properties of the steel product based on the final state of the metallic structure. In order to cope with the provision of additional production steps such as reheating, a homogeneous diffusion heat treatment, preliminary rolling, quenching, tempering and normalizing, etc., the method may further comprise the steps of completing a computation for the state of the metallic structure after applying the additional steps based on the state of the metallic structure before applying the additional steps and the conditions for the additional steps.
摘要翻译： PCT No.PCT / JP92 / 00720 Sec。 371日期：1993年2月3日 102（e）日期1993年2月3日PCT提交1992年6月4日PCT公布。 出版物WO92 / 21970 日期：1992年10月12日。一种估计钢产品特性的方法，包括根据关于钢成分和生产条件的信息确定冶金现象的计算，从铸造到热处理的步骤，以连续确定金属的状态 结构并从金属结构的最终状态估计钢产品的性能。 更具体地说，该方法包括以下步骤：基于铸造条件计算板坯的温度，并且基于关于板坯和钢材成分的温度的信息进一步完成铸造后的金属结构的状态的计算; 根据轧制前的金属结构的状态和轧制条件计算的钢材的温度，完成轧制后的金属结构的状态的计算; 根据冷却前的金属结构的状态和从冷却条件计算的钢制品的温度，完成冷却后的金属结构的状态的计算; 并根据金属结构的最终状态完成钢材的性能计算。 为了应对再加热，均质扩散热处理，预轧，淬火，回火和归一化等附加生产步骤，该方法还可以包括完成金属状态的计算的步骤 在施加附加步骤之前基于金属结构的状态应用附加步骤和附加步骤的条件之后的结构。
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