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1. 发明授权

US07857918B2 Method of production of steel product with nanocrystallized surface layer 有权
标题翻译：具有纳米结晶表面层的钢产品生产方法
公开(公告)号：US07857918B2
公开(公告)日：2010-12-28
申请号：US10535346
申请日：2003-11-17
申请人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose , Tomonori Tominaga , Yakichi Higo , Kazuki Takashima
发明人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose , Tomonori Tominaga , Yakichi Higo , Kazuki Takashima
IPC分类号： C21D7/06 , C21D10/00
CPC分类号： C21D7/04 , C21D2201/03 , C22F3/00 , Y10T29/4578
摘要： A method of production of a metallic product with a nanocrystallized surface layer comprising subjecting a surface layer of a metallic product to ultrasonic impact treatment by one or more ultrasonic indenters vibrating in a plurality of directions, then subjecting the surface layer subjected to the ultrasonic impact treatment to heat treatment at a low temperature to cause precipitation of nanocrystals.
摘要翻译：一种具有纳米结晶表面层的金属制品的制造方法，其特征在于，使金属制品的表面层通过在多个方向上振动的一个或多个超声波压头进行超声波冲击处理，然后对进行了超声波冲击处理的表层进行在低温下进行热处理，使纳米晶体析出。

2. 发明申请

US20060130942A1 Method of manufacturing metal product having nano-crystallized surface layer 有权
标题翻译：具有纳米结晶表面层的金属制品的制造方法
公开(公告)号：US20060130942A1
公开(公告)日：2006-06-22
申请号：US10535346
申请日：2003-11-17
申请人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose , Tomonori Tominaga , Yakichi Higo , Kazuki Takashima
发明人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose , Tomonori Tominaga , Yakichi Higo , Kazuki Takashima
IPC分类号： C22F3/00
CPC分类号： C21D7/04 , C21D2201/03 , C22F3/00 , Y10T29/4578
摘要： A method of production of a metallic product with a nanocrystallized surface layer comprising subjecting a surface layer of a metallic product to ultrasonic impact treatment by one or more ultrasonic indenters vibrating in a plurality of directions, then subjecting the surface layer subjected to the ultrasonic impact treatment to heat treatment at a low temperature to cause precipitation of nanocrystals.
摘要翻译：一种具有纳米结晶表面层的金属制品的制造方法，其特征在于，使金属制品的表面层通过在多个方向上振动的一个或多个超声波压头进行超声波冲击处理，然后对进行了超声波冲击处理的表层进行在低温下进行热处理，使纳米晶体析出。

3. 发明授权

US07754033B2 Method of improvement of toughness of heat affected zone at welded joint of steel plate 有权
标题翻译：改善钢板焊接接头热影响区韧性的方法
公开(公告)号：US07754033B2
公开(公告)日：2010-07-13
申请号：US10533607
申请日：2003-10-29
申请人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose
发明人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose
IPC分类号： C21D7/06
CPC分类号： C21D7/06 , B23K20/10 , B23K33/004 , B23K2103/04 , C21D7/04 , C21D9/50 , C21D10/00 , Y10T29/4578 , Y10T29/4583
摘要： A method of improvement of toughness of a heat affected zone in a multi-layer welded joint, a fillet welded joint, and a one-pass or several-pass large heat input welded joint of a steel plate is provided, that is, a method of improvement of toughness of a heat affected zone in a welded joint of a steel plate characterized subjecting a surface of a heat affected zone formed by a last pass of a multi-layer welded joint of a steel plate to impacts by an ultrasonic vibration tool or shot peening by ultrasonic vibration steel balls to thereby make an average of longitudinal axis of crystal grains up to a depth of 2 mm or more from the surface of the steel plate in the microstructure adjacent to a fusion line (FL) of a weld metal and a steel plate matrix in said heat affected zone formed by the last pass the equivalent of the crystal grain size of the steel plate matrix before the welding at a depth of ¼ of a thickness t from the surface of the steel plate.
摘要翻译：提供了一种提高钢板的多层焊接接头，圆角焊接接头和单程或多通大型热输入焊接接头中的热影响区域的韧性的方法，即，提高钢板的焊接接头中的热影响区域的韧性的特征在于，通过超声波振动工具对钢板的多层焊接接头的最后通过形成的热影响区域的表面进行冲击，通过超声波振动钢珠进行喷丸硬化，从而使得在与焊接金属的熔融线（FL）相邻的微结构中，钢板表面的平均纵轴为2mm以上的晶粒的纵轴，所述热影响区域中的钢板基质在焊接之前由钢板表面以厚度t的深度最后通过相当于钢板基体的晶粒尺寸。

4. 发明申请

US20060137777A1 Method of increasing toughness of heat-affected part of steel product welded joint 有权
标题翻译：提高钢产品焊接接头热影响部分韧性的方法
公开(公告)号：US20060137777A1
公开(公告)日：2006-06-29
申请号：US10533607
申请日：2003-10-29
申请人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose
发明人： Tadashi Ishikawa , Kiyotaka Nakashima , Tetsuro Nose
IPC分类号： C21D10/00
CPC分类号： C21D7/06 , B23K20/10 , B23K33/004 , B23K2103/04 , C21D7/04 , C21D9/50 , C21D10/00 , Y10T29/4578 , Y10T29/4583
摘要： A method of improvement of toughness of a heat affected zone in a multi-layer welded joint, a fillet welded joint, and a one-pass or several-pass large heat input welded joint of a steel plate is provided, that is, a method of improvement of toughness of a heat affected zone in a welded joint of a steel plate characterized subjecting a surface of a heat affected zone formed by a last pass of a multi-layer welded joint of a steel plate to impacts by an ultrasonic vibration tool or shot peening by ultrasonic vibration steel balls to thereby make an average of longitudinal axis of crystal grains up to a depth of 2 mm or more from the surface of the steel plate in the microstructure adjacent to a fusion line (FL) of a weld metal and a steel plate matrix in said heat affected zone formed by the last pass the equivalent of the crystal grain size of the steel plate matrix before the welding at a depth of ¼ of a thickness t from the surface of the steel plate.
摘要翻译：提供了一种提高钢板的多层焊接接头，圆角焊接接头和单程或多通大型热输入焊接接头中的热影响区域的韧性的方法，即，提高钢板的焊接接头中的热影响区域的韧性的特征在于，通过超声波振动工具对钢板的多层焊接接头的最后通过形成的热影响区域的表面进行冲击，通过超声波振动钢珠进行喷丸硬化，从而使得在与焊接金属的熔融线（FL）相邻的微结构中，钢板表面的平均纵轴为2mm以上的晶粒的纵轴，所述热影响区域中的钢板基质在焊接之前由钢板表面以厚度t的深度最后通过相当于钢板基体的晶粒尺寸。

5. 发明授权

US08146794B2 Boom and arm member of construction machine excellent in weld zone fatigue strength and method of improvement of its fatigue strength 有权
标题翻译：施工机械臂和臂构件焊接区疲劳强度优异，疲劳强度提高的方法
公开(公告)号：US08146794B2
公开(公告)日：2012-04-03
申请号：US11631100
申请日：2005-07-14
申请人： Tetsuro Nose , Kiyotaka Nakashima
发明人： Tetsuro Nose , Kiyotaka Nakashima
IPC分类号： B23K20/00
CPC分类号： B23K31/12 , B23K31/02 , B23K33/00 , B25D2250/291 , C21D7/04 , C21D9/50 , E02F3/38 , E02F9/14
摘要： The present invention provides a boom and arm member of a construction machine excellent in weld zone fatigue strength and a method of improvement of its fatigue strength, that is, a boom and arm member of a construction machine superior in weld zone fatigue strength, the boom and arm member of a construction machine characterized in that toes of full penetrated weld zones of the boom and arm member have vibration strike marks, and a method of improvement of its fatigue strength. Preferably, the residual stress of the bottom surface of the vibration strike marks is a 10 MPa or higher compressive residual stress.
摘要翻译：本发明提供一种焊接区疲劳强度优异的施工机械的起重臂和臂部件及其疲劳强度的提高方法，即焊接区疲劳强度优异的施工机械的起重臂和臂部件，以及施工机械的臂部件，其特征在于，所述起重臂和所述臂部件的完全穿透的焊接区域的脚趾具有振动打击标记，以及提高其疲劳强度的方法。优选地，振动击打标记的底面的残余应力为10MPa以上的压缩残余应力。

6. 发明申请

US20080292443A1 Boom and Arm Member of Construction Machine Excellent in Weld Zone Fatigue Strength and Method of Improvement of Its Fatigue Strength 有权
标题翻译：施工机械臂和臂部件在焊接区域的疲劳强度及其疲劳强度的提高方法优异
公开(公告)号：US20080292443A1
公开(公告)日：2008-11-27
申请号：US11631100
申请日：2005-07-14
申请人： Tetsuro Nose , Kiyotaka Nakashima
发明人： Tetsuro Nose , Kiyotaka Nakashima
IPC分类号： B66C23/00 , B23P17/00
CPC分类号： B23K31/12 , B23K31/02 , B23K33/00 , B25D2250/291 , C21D7/04 , C21D9/50 , E02F3/38 , E02F9/14
摘要： The present invention provides a boom and arm member of a construction machine excellent in weld zone fatigue strength and a method of improvement of its fatigue strength, that is, a boom and arm member of a construction machine superior in weld zone fatigue strength, the boom and arm member of a construction machine characterized in that toes of full penetrated weld zones of the boom and arm member have vibration strike marks, and a method of improvement of its fatigue strength. Preferably, the residual stress of the bottom surface of the vibration strike marks is a 10 MPa or higher compressive residual stress.
摘要翻译：本发明提供一种焊接区疲劳强度优异的施工机械的起重臂和臂部件及其疲劳强度的提高方法，即焊接区疲劳强度优异的施工机械的起重臂和臂部件，以及施工机械的臂部件，其特征在于，所述起重臂和所述臂部件的完全穿透的焊接区域的脚趾具有振动打击标记，以及提高其疲劳强度的方法。优选地，振动击打标记的底面的残余应力为10MPa以上的压缩残余应力。

7. 发明申请

US20070134059A1 Circularly welded joint featuring excellent fatigue strength, method of producing circularly welded joint and welded structure 有权
标题翻译：圆形焊接接头具有优良的疲劳强度，生产圆形焊接接头和焊接结构的方法
公开(公告)号：US20070134059A1
公开(公告)日：2007-06-14
申请号：US10530948
申请日：2003-10-08
申请人： Kiyotaka Nakashima , Tadashi Ishikawa
发明人： Kiyotaka Nakashima , Tadashi Ishikawa
IPC分类号： B32B15/00
CPC分类号： B23K9/02 , B23K31/02 , B23K2103/04 , Y10T403/478 , Y10T428/12375 , Y10T428/12965
摘要： A circularly welded joint featuring excellent fatigue strength obtained by welding the ends of two pieces of steel plates perpendicularly together and used for the welded structures such as buildings, ships, bridges, construction machinery and off-shore structures, a method of producing the circularly welded joints and a welded structure using the circularly welded joints are provided. A circularly welded joint is obtained by welding the ends of two pieces of steel plates perpendicularly together. Between the two pieces of the steel plates, at least the steel plate on the side on which the main stress is exerted is one that suppresses the propagation of cracks due to fatigue and, preferably, one having the compressive residual stress in the surface layer of the steel plate. When the thickness of the steel plate is denoted by t, the residual stress in the direction of main stress is the compressive residual stress over a range of not smaller than t/10 or not smaller than 3 mm in the direction of plate thickness from the circularly welded surface of the steel plate.
摘要翻译：一种圆形焊接接头，通过将两块钢板的端部垂直地焊接在一起并用于诸如建筑物，船舶，桥梁，工程机械和离岸结构的焊接结构而获得的优异的疲劳强度，一种生产圆形焊接提供了使用圆形焊接接头的接头和焊接结构。通过将两块钢板的端部垂直焊接在一起，获得圆形焊接接头。在两块钢板之间，至少施加有主应力的一侧的钢板是抑制由于疲劳引起的裂纹的传播的钢板，优选地，在表面层中具有压缩残余应力的钢板钢板。当钢板的厚度为t时，主应力方向的残余应力是在板厚方向上不小于t / 10或不小于3mm的范围内的压缩残余应力钢板的圆形焊接表面。

8. 发明授权

US07695825B2 Circularly welded joint featuring excellent fatigue strength, method of producing circularly welded joint and welded structure 有权
标题翻译：圆形焊接接头具有优良的疲劳强度，生产圆形焊接接头和焊接结构的方法
公开(公告)号：US07695825B2
公开(公告)日：2010-04-13
申请号：US10530948
申请日：2003-10-08
申请人： Kiyotaka Nakashima , Tadashi Ishikawa
发明人： Kiyotaka Nakashima , Tadashi Ishikawa
IPC分类号： B23K9/23 , B23K20/10 , B32B15/18 , C21D7/00
CPC分类号： B23K9/02 , B23K31/02 , B23K2103/04 , Y10T403/478 , Y10T428/12375 , Y10T428/12965
摘要： A circularly welded joint featuring excellent fatigue strength obtained by welding the ends of two pieces of steel plates perpendicularly together and used for the welded structures such as buildings, ships, bridges, construction machinery and off-shore structures, a method of producing the circularly welded joints and a welded structure using the circularly welded joints are provided. A circularly welded joint is obtained by welding the ends of two pieces of steel plates perpendicularly together. Between the two pieces of the steel plates, at least the steel plate on the side on which the main stress is exerted is one that suppresses the propagation of cracks due to fatigue and, preferably, one having the compressive residual stress in the surface layer of the steel plate. When the thickness of the steel plate is denoted by t, the residual stress in the direction of main stress is the compressive residual stress over a range of not smaller than t/10 or not smaller than 3 mm in the direction of plate thickness from the circularly welded surface of the steel plate.
摘要翻译：一种圆形焊接接头，通过将两块钢板的端部垂直地焊接在一起并用于诸如建筑物，船舶，桥梁，工程机械和离岸结构的焊接结构而获得的优异的疲劳强度，一种生产圆形焊接提供了使用圆形焊接接头的接头和焊接结构。通过将两块钢板的端部垂直焊接在一起，获得圆形焊接接头。在两块钢板之间，至少施加有主应力的一侧的钢板是抑制由于疲劳引起的裂纹的传播的钢板，优选地，在表面层中具有压缩残余应力的钢板钢板。当钢板的厚度为t时，主应力方向的残余应力是在板厚方向上不小于t / 10或不小于3mm的范围内的压缩残余应力钢板的圆形焊接表面。

9. 发明申请

US20090092515A1 HIGH STRENGTH THICK STEEL PLATE SUPERIOR IN CRACK ARRESTABILITY 有权
标题翻译：高强度厚钢板超级破碎机
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。

10. 发明授权

US07914629B2 High strength thick steel plate superior in crack arrestability 有权
标题翻译：高强度厚钢板抗裂性优越
公开(公告)号：US07914629B2
公开(公告)日：2011-03-29
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： C22C38/08
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：NlE; 0.02％，S：＆lt; ll; 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。

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