公开(公告)号：US08778261B2

公开(公告)日：2014-07-15

申请号：US13300970

申请日：2011-11-21

申请人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

发明人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

IPC分类号： C22C38/12

CPC分类号： B60G9/00 ,  B60G21/051 ,  B60G2200/20 ,  B60G2206/202 ,  B60G2206/72 ,  C21D9/00 ,  C21D9/08 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： The present invention provides a steel material for automobile chassis parts, having high fatigue characteristics, without a heat treatment, and superior shapeability, and a method of production of such automobile chassis parts. The surface of the steel has a high hardness and the center has a low hardness, providing the superior characteristics. With an annealing step of the invention, it is possible to relieve internal stress and further improve fatigue characteristics.

摘要翻译： 本发明提供一种汽车底盘部件用钢材，具有高疲劳特性，无需热处理，成型性优异，以及制造这种汽车底盘部件的方法。 钢的表面硬度高，中心硬度低，具有优异的特性。 通过本发明的退火步骤，可以减轻内部应力并进一步改善疲劳特性。

公开(公告)号：US20090277542A1

公开(公告)日：2009-11-12

申请号：US12310033

申请日：2007-08-08

申请人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

发明人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

IPC分类号： C21D6/00 ,  C22C38/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/08 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26

CPC分类号： B60G9/00 ,  B60G21/051 ,  B60G2200/20 ,  B60G2206/202 ,  B60G2206/72 ,  C21D9/00 ,  C21D9/08 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： The present invention provides a steel material for automobile chassis parts which has high fatigue characteristics, does not require much cost for heat treatment, and further is superior in shapeability and a method of production of automobile chassis parts using this steel material, that is, one being a steel material to which Nb and Mo have been compositely added and having a difference 50 to 150 points between a Vicker's hardness of the center of plate thickness and a maximum value of Vicker's hardness within 0.5 mm from the surface after bending by a bending R of the plate outer surface of 2 to 5 times the plate thickness. The surface is high in hardness and the center part is low in hardness, so the fatigue characteristics and shapeability are superior. Note that if annealing under conditions giving a tempering parameter λ defined by λ=T(20+log(t)) of 14000 to 19000 (where T is the absolute temperature, t is the time (h), and the temperature rise is 660° C.), it is possible to relieve the internal stress and further improve the fatigue characteristics.

摘要翻译： 本发明提供一种汽车底盘部件用钢材，其耐疲劳特性高，热处理成本低，成型性优良，使用该钢材的汽车底盘部件的制造方法也就是一种 作为将Nb和Mo复合添加的钢材，在板厚中心的维氏硬度与弯曲后的表面0.5mm以内的维氏硬度的最大值之间的差为50〜150点的弯曲R 的板外表面为板厚的2〜5倍。 表面硬度高，中心部硬度低，疲劳特性和成型性优异。 注意，如果在给出由λ= T（20 + log（t））定义的回火参数λ为14000至19000的条件下退火（其中T为绝对温度，t为时间（h），温度升高为660 °C），可以缓解内部应力，进一步提高疲劳特性。

公开(公告)号：US08828159B2

公开(公告)日：2014-09-09

申请号：US12310033

申请日：2007-08-08

申请人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

发明人： Hideyuki Nakamura ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

IPC分类号： C21D9/08 ,  C21D8/10

CPC分类号： B60G9/00 ,  B60G21/051 ,  B60G2200/20 ,  B60G2206/202 ,  B60G2206/72 ,  C21D9/00 ,  C21D9/08 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： The present invention provides a steel material for automobile chassis parts which has high fatigue characteristics, does not require much cost for heat treatment, and further is superior in shapeability and a method of production of automobile chassis parts using this steel material, that is, one being a steel material to which Nb and Mo have been compositely added and having a difference 50 to 150 points between a Vicker's hardness of the center of plate thickness and a maximum value of Vicker's hardness within 0.5 mm from the surface after bending by a bending R of the plate outer surface of 2 to 5 times the plate thickness. The surface is high in hardness and the center part is low in hardness, so the fatigue characteristics and shapeability are superior. Note that if annealing under conditions giving a tempering parameter λ defined by λ=T(20+log(t)) of 14000 to 19000 (where T is the absolute temperature, t is the time (h), and the temperature rise is 660° C.), it is possible to relieve the internal stress and further improve the fatigue characteristics.

摘要翻译： 本发明提供一种汽车底盘部件用钢材，其耐疲劳特性高，热处理成本低，成型性优良，使用该钢材的汽车底盘部件的制造方法也就是一种 作为将Nb和Mo复合添加的钢材，在板厚中心的维氏硬度与弯曲后的表面0.5mm以内的维氏硬度的最大值之间的差为50〜150点的弯曲R 的板外表面为板厚的2〜5倍。 表面硬度高，中心部硬度低，疲劳特性和成型性优异。 注意，如果在给出由λ= T（20 + log（t））定义的回火参数λ为14000至19000的条件下退火（其中T为绝对温度，t为时间（h），温度升高为660 °C），可以缓解内部应力，进一步提高疲劳特性。

公开(公告)号：US20120093678A1

公开(公告)日：2012-04-19

申请号：US13300970

申请日：2011-11-21

申请人： Hideyuki NAKAMURA ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

发明人： Hideyuki NAKAMURA ,  Isao Anai ,  Yasushi Yamamoto ,  Takaaki Fukushi ,  Izuru Yamamoto ,  Masaaki Kondo ,  Satoru Shimazu

IPC分类号： C22C38/22 ,  C22C38/08 ,  C22C38/16 ,  C22C38/00 ,  C22C38/04 ,  C22C38/12

CPC分类号： B60G9/00 ,  B60G21/051 ,  B60G2200/20 ,  B60G2206/202 ,  B60G2206/72 ,  C21D9/00 ,  C21D9/08 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： The present invention provides a steel material for automobile chassis parts, having high fatigue characteristics, without a heat treatment, and superior shapeability, and a method of production of such automobile chassis parts. The surface of the steel has a high hardness and the center has a low hardness, providing the superior characteristics. With an annealing step of the invention, it is possible to relieve internal stress and further improve fatigue characteristics.

摘要翻译： 本发明提供一种汽车底盘部件用钢材，具有高疲劳特性，无需热处理，成型性优异，以及制造这种汽车底盘部件的方法。 钢的表面硬度高，中心硬度低，具有优异的特性。 通过本发明的退火步骤，可以减轻内部应力并进一步改善疲劳特性。

公开(公告)号：US08894080B2

公开(公告)日：2014-11-25

申请号：US12736756

申请日：2009-05-12

申请人： Takaaki Fukushi ,  Isao Anai ,  Yasushi Yamamoto ,  Hideyuki Nakamura ,  Yoshiaki Kadoma ,  Naoki Hori

发明人： Takaaki Fukushi ,  Isao Anai ,  Yasushi Yamamoto ,  Hideyuki Nakamura ,  Yoshiaki Kadoma ,  Naoki Hori

IPC分类号： B60G21/05 ,  B60G5/06 ,  B60G21/055 ,  B60G11/18 ,  B21D53/88

CPC分类号： B60G21/051 ,  B21D22/025 ,  B21D53/88 ,  B60G2200/21 ,  B60G2202/136 ,  B60G2206/20 ,  B60G2206/202 ,  B60G2206/203 ,  B60G2206/724 ,  B60G2206/8102 ,  Y10T29/49622 ,  Y10T29/5199 ,  Y10T29/53996 ,  Y10T428/12299

摘要： A method of press-forming a tubular part having a cross section of an irregular shape crushes a steel tube between an upper die and a lower die in order to form a V-shaped cross section. When the curvature radius of a tip of the upper die is defined as R1, the curvature radius of a bottom portion of the lower die corresponding to the tip of the upper die is defined as R2, and the wall thickness of the steel tube is defined as t; R1, R2, and t satisfy R1+2t=R2 and 1.5t≦R1≦3t.

摘要翻译： 压制成型具有不规则形状的管状部件的方法在上模和下模之间挤压钢管以形成V形横截面。 当上模的顶端的曲率半径被定义为R1时，与上模相对应的下模的底部的曲率半径定义为R2，并且限定钢管的壁厚 作为t R1，R2和t满足R1 + 2t = R2和1.5t＆nlE; R1＆nlE; 3t。

公开(公告)号：US20110121639A1

公开(公告)日：2011-05-26

申请号：US12736756

申请日：2009-05-12

申请人： Takaaki Fukushi ,  Isao Anai ,  Yasushi Yamamoto ,  Hideyuki Nakamura ,  Yoshiaki Kadoma ,  Naoki Hori

发明人： Takaaki Fukushi ,  Isao Anai ,  Yasushi Yamamoto ,  Hideyuki Nakamura ,  Yoshiaki Kadoma ,  Naoki Hori

IPC分类号： B60B35/00 ,  B21D22/02 ,  B21D53/88

CPC分类号： B60G21/051 ,  B21D22/025 ,  B21D53/88 ,  B60G2200/21 ,  B60G2202/136 ,  B60G2206/20 ,  B60G2206/202 ,  B60G2206/203 ,  B60G2206/724 ,  B60G2206/8102 ,  Y10T29/49622 ,  Y10T29/5199 ,  Y10T29/53996 ,  Y10T428/12299

摘要： A method of press-forming a tubular part having a cross section of an irregular shape crushes a steel tube between an upper die and a lower die in order to form a V-shaped cross section. When the curvature radius of a tip of the upper die is defined as R1, the curvature radius of a bottom portion of the lower die corresponding to the tip of the upper die is defined as R2, and the wall thickness of the steel tube is defined as t; R1, R2, and t satisfy R1+2t=R2 and 1.5t≦R1≦3t.

摘要翻译： 压制成型具有不规则形状的管状部件的方法在上模和下模之间挤压钢管以形成V形横截面。 当上模的顶端的曲率半径被定义为R1时，与上模相对应的下模的底部的曲率半径定义为R2，并且限定钢管的壁厚 作为t R1，R2和t满足R1 + 2t = R2和1.5t＆nlE; R1＆nlE; 3t。

公开(公告)号：US09050646B2

公开(公告)日：2015-06-09

申请号：US13697557

申请日：2010-11-25

申请人： Takaaki Fukushi ,  Hideyuki Nakamura ,  Isao Anai

发明人： Takaaki Fukushi ,  Hideyuki Nakamura ,  Isao Anai

IPC分类号： C22C38/06 ,  C21D7/12 ,  C21D9/08 ,  C22C38/14 ,  C22C38/32 ,  C22C38/02 ,  C22C38/04 ,  B21D53/88 ,  C21D6/00 ,  C21D8/02 ,  C21D9/00 ,  C21D9/28 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

CPC分类号： B21D53/88 ,  C21D6/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/0068 ,  C21D9/08 ,  C21D9/28 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： An automobile chassis part which is excellent in low cycle fatigue characteristics, characterized by being formed by steel which contains, by mass %, C: 0.02 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.3 to 2.5%, P: 0.03% or less, S: 0.01% or less, Ti: 0.005 to 0.1%, Al: 0.005 to 0.1%, N: 0.0005 to 0.006%, and B: 0.0001 to 0.01 and has a balance of Fe and unavoidable impurities, in which 80% or more of the part structure comprises a bainite structure and in which a portion where a ratio R/t of the thickness “t” and external surface curvature radius R is 5 or less has an X-ray half width of an (211) plane of 5 (deg) or less.

摘要翻译： 一种低循环疲劳特性优异的汽车底盘部，其特征在于，以质量％计含有C：0.02〜0.10％，Si：0.05〜1.0％，Mn：0.3〜2.5％，P：0.03 ％以下，S：0.01％以下，Ti：0.005〜0.1％，Al：0.005〜0.1％，N：0.0005〜0.006％，B：0.0001〜0.01，余量为Fe和不可避免的杂质，其中 部件结构的80％以上包括贝氏体组织，其中厚度“t”和外表面曲率半径R的比率R / t为5以下的部分的X射线半值宽度为（211 ）面为5（度）以下。

公开(公告)号：US20130056115A1

公开(公告)日：2013-03-07

申请号：US13697557

申请日：2010-11-25

申请人： Takaaki Fukushi ,  Hideyuki Nakamura ,  Isao Anai

发明人： Takaaki Fukushi ,  Hideyuki Nakamura ,  Isao Anai

IPC分类号： C21D9/08 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/58 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/02 ,  C22C38/42

CPC分类号： B21D53/88 ,  C21D6/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/0068 ,  C21D9/08 ,  C21D9/28 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： An automobile chassis part which is excellent in low cycle fatigue characteristics, characterized by being formed by steel which contains, by mass %, C: 0.02 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.3 to 2.5%, P: 0.03% or less, S: 0.01% or less, Ti: 0.005 to 0.1%, Al: 0.005 to 0.1%, N: 0.0005 to 0.006%, and B: 0.0001 to 0.01 and has a balance of Fe and unavoidable impurities, in which 80% or more of the part structure comprises a bainite structure and in which a portion where a ratio R/t of the thickness “t” and external surface curvature radius R is 5 or less has an X-ray half width of an (211) plane of 5 (deg) or less.

摘要翻译： 一种低循环疲劳特性优异的汽车底盘部，其特征在于，以质量％计含有C：0.02〜0.10％，Si：0.05〜1.0％，Mn：0.3〜2.5％，P：0.03 ％以下，S：0.01％以下，Ti：0.005〜0.1％，Al：0.005〜0.1％，N：0.0005〜0.006％，B：0.0001〜0.01，余量为Fe和不可避免的杂质，其中 部件结构的80％以上包括贝氏体组织，其中厚度t和外表面曲率半径R的比值R / t为5以下的部分具有（211）面的X射线半值宽度 为5（度）以下。