公开(公告)号：US08048367B2

公开(公告)日：2011-11-01

申请号：US12867731

申请日：2009-10-22

申请人： Manabu Hoshino ,  Masaaki Fujioka ,  Youichi Tanaka ,  Masanori Minagawa

发明人： Manabu Hoshino ,  Masaaki Fujioka ,  Youichi Tanaka ,  Masanori Minagawa

IPC分类号： C22C38/04 ,  C22C38/00 ,  C21D8/02 ,  C21D8/00

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℃。

公开(公告)号：US20110041965A1

公开(公告)日：2011-02-24

申请号：US12867731

申请日：2009-10-22

申请人： Manabu Hoshino ,  Masaaki Fujioka ,  Youichi Tanaka ,  Masanori Minagawa

发明人： Manabu Hoshino ,  Masaaki Fujioka ,  Youichi Tanaka ,  Masanori Minagawa

IPC分类号： C21D8/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58 ,  C22C38/38 ,  C22C38/04

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℃。

公开(公告)号：US20100108202A1

公开(公告)日：2010-05-06

申请号：US12450997

申请日：2009-03-31

申请人： Manabu Hoshino ,  Masaaki Fujioka ,  Yoichi Tanaka ,  Masanori Minagawa

发明人： Manabu Hoshino ,  Masaaki Fujioka ,  Yoichi Tanaka ,  Masanori Minagawa

IPC分类号： C21D11/00 ,  C21D7/13

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。

公开(公告)号：US08043447B2

公开(公告)日：2011-10-25

申请号：US12450997

申请日：2009-03-31

申请人： Manabu Hoshino ,  Masaaki Fujioka ,  Yoichi Tanaka ,  Masanori Minagawa

发明人： Manabu Hoshino ,  Masaaki Fujioka ,  Yoichi Tanaka ,  Masanori Minagawa

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。

公开(公告)号：US08562762B2

公开(公告)日：2013-10-22

申请号：US12449815

申请日：2008-02-29

申请人： Tatsuo Yokoi ,  Masanori Minagawa ,  Takuya Hara ,  Osamu Yoshida ,  Hiroshi Abe

发明人： Tatsuo Yokoi ,  Masanori Minagawa ,  Takuya Hara ,  Osamu Yoshida ,  Hiroshi Abe

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/14 ,  C21D11/00 ,  C21D8/00

CPC分类号： C22C38/02 ,  B21B1/22 ,  C21D8/021 ,  C21D8/0226 ,  C21D2201/05 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： The present invention provides high strength hot rolled steel plate for line-pipes superior in low temperature toughness, and a method of production of the same, containing, by mass %, C: 0.01 to 0.1%, Si: 0.05 to 0.5%, Mn: 1 to 2%, P: ≦0.03%, S: ≦0.005%, O: ≦0.003%, Al: 0.005 to 0.05%, N: 0.0015 to 0.006%, Nb: 0.005 to 0.08%, and Ti: 0.005 to 0.02%, where N−14/48×Ti>0% and Nb−93/14×(N−14/48×Ti)>0.005%, and a balance of Fe and unavoidable impurities, said steel plate characterized in that its microstructure is a continuously cooled transformed structure, a reflected X-ray intensity ratio {211}/{111} of the {211} plane and {111} plane parallel to the plate surface in the texture at the center of plate thickness is 1.1 or more, and an in-grain precipitate density of the precipitates of Nb and/or Ti carbonitrides is 1017 to 1018/cm3.

摘要翻译： 本发明提供了具有优异的低温韧性的线管的高强度热轧钢板及其制造方法，以质量％计含有C：0.01〜0.1％，Si：0.05〜0.5％，Mn ：1〜2％，P：0.03％，S：0.005％，O：0.003％，Al：0.005〜0.05％，N：0.0015〜0.006％，Nb：0.005〜0.08％，Ti：0.005〜 0.02％，其中N-14/48×Ti> 0％和Nb-93/14×（N-14/48×Ti）> 0.005％，余量为Fe和不可避免的杂质，其特征在于： 微结构是连续冷却的变换结构，在板厚中心处的织构中平行于板表面的{211}面和{111}面的反射X射线强度比{211} / {111}为1.1或 Nb和/或Ti碳氮化物的析出物的颗粒内析出密度为1017〜1018 / cm3。

公开(公告)号：US20100084054A1

公开(公告)日：2010-04-08

申请号：US12449815

申请日：2008-02-29

申请人： Tatsuo Yokoi ,  Masanori Minagawa ,  Takuya Hara ,  Osamu Yoshida ,  Hiroshi Abe

发明人： Tatsuo Yokoi ,  Masanori Minagawa ,  Takuya Hara ,  Osamu Yoshida ,  Hiroshi Abe

IPC分类号： C21D11/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/08 ,  C22C38/02 ,  C22C38/18 ,  C22C38/06 ,  C22C38/38 ,  C22C38/04

CPC分类号： C22C38/02 ,  B21B1/22 ,  C21D8/021 ,  C21D8/0226 ,  C21D2201/05 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： The present invention provides high strength hot rolled steel plate for line-pipes superior in low temperature toughness, and a method of production of the same, containing, by mass %, C: 0.01 to 0.1%, Si: 0.05 to 0.5%, Mn: 1 to 2%, P: ≦0.03%, S: ≦0.005%, O: ≦0.003%, Al: 0.005 to 0.05%, N: 0.0015 to 0.006%, Nb: 0.005 to 0.08%, and Ti: 0.005 to 0.02%, where N−14/48×Ti>0% and Nb—93/14×(N−14/48×Ti)>0.005%, and a balance of Fe and unavoidable impurities, said steel plate characterized in that its microstructure is a continuously cooled transformed structure, a reflected X-ray intensity ratio {211}/{111} of the {211} plane and {111} plane parallel to the plate surface in the texture at the center of plate thickness is 1.1 or more, and an in-grain precipitate density of the precipitates of Nb and/or Ti carbonitrides is 1017 to 1018/cm3.

摘要翻译： 本发明提供了具有优异的低温韧性的线管的高强度热轧钢板及其制造方法，以质量％计含有C：0.01〜0.1％，Si：0.05〜0.5％，Mn ：1〜2％，P：NlE 0.03％S：＆lt; NlE 0.005％O：＆lt; nlE 0.003％Al：0.005〜0.05％N：0.0015〜0.006％Nb：0.005〜0.08％ ：0.005〜0.02％，其中N-14/48×Ti> 0％，Nb-93/14×（N-14/48×Ti）> 0.005％，余量为Fe和不可避免的杂质， 由于其微结构是连续冷却的变换结构，所以在板厚中心处的纹理中平行于板表面的{211}面和{111}面的反射X射线强度比{211} / {111} 为1.1以上，Nb和/或Ti碳氮化物的析出物的颗粒内析出密度为1017〜1018 / cm3。

公开(公告)号：US20130069456A1

公开(公告)日：2013-03-21

申请号：US13635400

申请日：2011-06-06

申请人： Yasuhiko Matsuki ,  Masanori Minagawa

发明人： Yasuhiko Matsuki ,  Masanori Minagawa

IPC分类号： H02K9/24

CPC分类号： H02K9/26 ,  H02K1/32 ,  H02K5/20 ,  H02K9/19

摘要： A cooling circuit for an electric motor for a construction machine includes a circulation line that includes a shaft-side line disposed in a rotor shaft of the electric motor, a pump that supplies cooling fluid to the circulation line, a first filter disposed between the pump and the shaft-side line in the circulation line, a first bypass line that bypasses the first filter so as to connect an upstream side and a downstream side of the first filter, and a first relief valve disposed in the first bypass line.

摘要翻译： 用于建筑机械的电动机的冷却回路包括循环管线，其包括设置在电动机的转子轴中的轴侧线，向循环管线供应冷却流体的泵，设置在泵 和循环管路中的轴侧管路，绕过第一过滤器以连接第一过滤器的上游侧和下游侧的第一旁通管路和设置在第一旁通管路中的第一溢流阀。

公开(公告)号：US07829202B2

公开(公告)日：2010-11-09

申请号：US10576224

申请日：2004-10-22

申请人： Tadashi Ishikawa ,  Takehiro Inoue ,  Hiroshi Shimanuki ,  Tadashi Koseki ,  Jun Otani ,  Masanori Minagawa ,  Akihiko Kojima

发明人： Tadashi Ishikawa ,  Takehiro Inoue ,  Hiroshi Shimanuki ,  Tadashi Koseki ,  Jun Otani ,  Masanori Minagawa ,  Akihiko Kojima

IPC分类号： B32B7/02 ,  B32B7/04 ,  B32B15/18 ,  B23K103/04

CPC分类号： C22C38/02 ,  B23K9/02 ,  B23K9/23 ,  B23K31/12 ,  B23K2103/06 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  Y10T403/477 ,  Y10T428/12965 ,  Y10T428/24983

摘要： A large-heat-input butt-welded joint of welded structures prepared by butt-welding high-strength steel plates over 50 mm in thickness, having excellent brittle fracture resistance, is characterized by: (a1) the hardness of the weld metal is not more than 110% of the hardness of the base metal or (a2) the hardness of the weld metal is not less than 70% and not more than 110% of the hardness of the base metal, and, as required, (b) the width of the weld metal is not more than 70% of the plate thickness of the base metal, (c) the width of the region affected by welding whose hardness is softened to not more than 95% of the hardness of the non-heat-affected base metal has a width not less than 5 mm, and/or (d) the prior austenite grain size in the heat-affected zone (HAZ) contacting the welding fusion line is not more than 200 μm.

摘要翻译： 通过对焊高50mm以上的高强度钢板制成的具有优异的耐脆性断裂性的焊接结构的大型热输入对接焊接接头的特征在于：（a1）焊接金属的硬度不是 贱金属的硬度超过110％，（a2）焊接金属的硬度不低于贱金属的硬度的70％且不超过11​​0％，并且根据需要，（b） 焊接金属的宽度不大于贱金属板厚度的70％，（c）硬度受软化的焊接区域的宽度不大于不加热的硬度的95％ 受影响的贱金属具有不小于5mm的宽度，和/或（d）与焊接熔合线接触的热影响区（HAZ）中的原奥氏体晶粒尺寸不大于200μm。

公开(公告)号：US20090092515A1

公开(公告)日：2009-04-09

申请号：US12296893

申请日：2007-04-13

申请人： Kiyotaka Nakashima ,  Masanori Minagawa ,  Kouji Ishida ,  Akira Ito

发明人： Kiyotaka Nakashima ,  Masanori Minagawa ,  Kouji Ishida ,  Akira Ito

IPC分类号： C22C38/16 ,  C22C38/08 ,  C22C38/00

CPC分类号： C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  Y10T428/12021 ,  Y10T428/12458

摘要： The present invention provides high strength thick steel plate superior in crack arrestability high in strength, free of deterioration of HAZ toughness, and free of anisotropy, that steel plate containing, by mass %, C: 0.03 to 0.15%, Si: 0.1 to 0.5%, Mn: 0.5 to 2.0%, P: ≦0.02%, S: ≦0.01%, Al: 0.001 to 0.1%, Ti: 0.005 to 0.02%, Ni: 0.15 to 2%, and N: 0.001 to 0.008% and having a balance of iron and unavoidable impurities as chemical components, having a microstructure of a ferrite and/or pearlite structure with bainite as a matrix phase, and having an average circle equivalent diameter of crystal grains with a crystal misorientation angle of 15° or more of 15 μm or less in the regions of 10% of plate thickness from the front and rear surfaces and of 40 μm or less in the other region including the center part of plate thickness.

摘要翻译： 本发明提供高强度的高强度厚钢板，其强度高，无HAZ韧性劣化，无各向异性，钢板以质量％计含有C：0.03〜0.15％，Si：0.1〜0.5 ％，Mn：0.5〜2.0％，P：<= 0.02％，S：<0.01％，Al：0.001〜0.1％，Ti：0.005〜0.02％，Ni：0.15〜2％，N：0.001〜 ％，并且具有作为化学成分的铁和不可避免的杂质的平衡，具有贝氏体作为基质相的铁素体和/或珠光体组织的微结构，并且具有晶体取向角为15°的晶粒的平均圆当量直径 在前后表面的厚度为10％的区域为15μm以下，在包含板厚中心的其他区域为40μm以下。

公开(公告)号：US20070131316A1

公开(公告)日：2007-06-14

申请号：US10576224

申请日：2004-10-22

申请人： Tadashi Ishikawa ,  Takehiro Inoue ,  Hiroshi Shimanuki ,  Tadashi Koseki ,  Jun Otani ,  Masanori Minagawa ,  Akihiko Kojima

发明人： Tadashi Ishikawa ,  Takehiro Inoue ,  Hiroshi Shimanuki ,  Tadashi Koseki ,  Jun Otani ,  Masanori Minagawa ,  Akihiko Kojima

IPC分类号： B32B15/18

CPC分类号： C22C38/02 ,  B23K9/02 ,  B23K9/23 ,  B23K31/12 ,  B23K2103/06 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  Y10T403/477 ,  Y10T428/12965 ,  Y10T428/24983

摘要： A large-heat-input butt-welded joint of welded structures prepared by butt-welding high-strength steel plates over 50 mm in thickness, having excellent brittle fracture resistance, is characterized by: (a1) the hardness of the weld metal is not more than 110% of the hardness of the base metal or (a2) the hardness of the weld metal is not less than 70% and not more than 110% of the hardness of the base metal, and, as required, (b) the width of the weld metal is not more than 70% of the plate thickness of the base metal, (c) the width of the region affected by welding whose hardness is softened to not more than 95% of the hardness of the non-heat-affected base metal has a width not less than 5 mm, and/or (d) the prior austenite grain size in the heat-affected zone (HAZ) contacting the welding fusion line is not more than 200 μm.

摘要翻译： 通过对焊高50mm以上的高强度钢板制成的具有优异的耐脆性断裂性的焊接结构的大型热输入对接焊接接头的特征在于：（a1）焊接金属的硬度不是 贱金属的硬度超过110％，（a2）焊接金属的硬度不低于贱金属的硬度的70％且不超过11​​0％，并且根据需要，（b） 焊接金属的宽度不大于贱金属板厚度的70％，（c）硬度受软化的焊接区域的宽度不大于不加热的硬度的95％ 受影响的贱金属的宽度不小于5mm，和/或（d）与焊接熔接线接触的热影响区（HAZ）中的原奥氏体晶粒尺寸不大于200μm。