公开(公告)号：US09187797B2

公开(公告)日：2015-11-17

申请号：US13823644

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota ,  Yoichi Taniguchi ,  Junichi Nakatsuka ,  Kazuhiro Fujimura ,  Satoshi Koganemaru

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota ,  Yoichi Taniguchi ,  Junichi Nakatsuka ,  Kazuhiro Fujimura ,  Satoshi Koganemaru

IPC分类号： C21D8/00 ,  C22C38/00 ,  B21J1/00 ,  C21D6/00 ,  C21D1/20 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D6/00 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.20 to 0.25%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 超过0.20〜0.25％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质组成，其中钢结构体含有贝氏体结构， 贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比为95％ 在贝氏体结构中为0.18％以上。

公开(公告)号：US20130186529A1

公开(公告)日：2013-07-25

申请号：US13823644

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota ,  Yoichi Taniguchi ,  Junichi Nakatsuka ,  Kazuhiro Fujimura ,  Satoshi Koganemaru

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota ,  Yoichi Taniguchi ,  Junichi Nakatsuka ,  Kazuhiro Fujimura ,  Satoshi Koganemaru

IPC分类号： C21D8/00 ,  C22C38/02 ,  C22C38/26 ,  C22C38/00 ,  C22C38/22 ,  C22C38/38 ,  C22C38/06

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D6/00 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.20 to 0.25%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 超过0.20〜0.25％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质组成，其中钢结构体含有贝氏体结构， 贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比为95％ 在贝氏体结构中为0.18％以上。

公开(公告)号：US08916008B2

公开(公告)日：2014-12-23

申请号：US13823461

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC分类号： C21D8/00 ,  C22C38/00 ,  C22C38/26 ,  C22C38/24 ,  C22C38/04 ,  C21D1/20 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C21D6/00 ,  B21J1/00 ,  C22C38/38 ,  C22C38/60

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D6/00 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: 0.05 to 0.20%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 0.05〜0.20％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质构成，其中钢结构体含有具有面积 比例为95％以上，贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比 贝氏体组织为0.18％以上。

公开(公告)号：US08926767B2

公开(公告)日：2015-01-06

申请号：US13823655

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC分类号： C21D8/00 ,  C22C38/00 ,  B21J1/00 ,  C21D1/20

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D2211/002 ,  C21D2211/004

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.25 to 0.50%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 超过0.25〜0.50％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质构成，其中钢结构体含有贝氏体组织 贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比为95％ 在贝氏体结构中为0.18％以上。

公开(公告)号：US20130186528A1

公开(公告)日：2013-07-25

申请号：US13823461

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC分类号： C21D8/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/24 ,  C22C38/38

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D6/00 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: 0.05 to 0.20%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 0.05〜0.20％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质构成，其中钢结构体含有具有面积 比例为95％以上，贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比 贝氏体组织为0.18％以上。

公开(公告)号：US20130167986A1

公开(公告)日：2013-07-04

申请号：US13823655

申请日：2012-05-25

申请人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

发明人： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC分类号： C21D8/00

CPC分类号： C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D2211/002 ,  C21D2211/004

摘要： The present invention provides a steel part for machine structural use whose fatigue strength and toughness are improved and a manufacturing method thereof. A steel part made of a steel containing, in mass %, C: 0.05 to 0.20%, Si: 0.10 to 1.00%, Mn: 0.75 to 3.00%, P: 0.001 to 0.050%, S: 0.001 to 0.200%, V: exceeding 0.25 to 0.50%, Cr: 0.01 to 1.00%, Al: 0.001 to 0.500%, and N: 0.0080 to 0.0200%, and a balance being composed of Fe and inevitable impurities, in which a steel structure contains a bainite structure having an area ratio of 95% or more, a bainite lath width is 5 μm or less, V carbide having an average grain diameter of not less than 4 nm nor more than 7 nm dispersedly exists in the bainite structure, and an area ratio of V carbide in the bainite structure is 0.18% or more.

摘要翻译： 本发明提供了一种改善疲劳强度和韧性的机械结构用钢部件及其制造方法。 钢的钢部件以质量％计含有C：0.05〜0.20％，Si：0.10〜1.00％，Mn：0.75〜3.00％，P：0.001〜0.050％，S：0.001〜0.200％，V： 超过0.25〜0.50％，Cr：0.01〜1.00％，Al：0.001〜0.500％，N：0.0080〜0.0200％，余量由Fe和不可避免的杂质构成，其中钢结构体含有贝氏体组织 贝氏体板条宽度为5μm以下，平均粒径为4nm以上且7nm以下的V碳化物分散存在于贝氏体组织中，V碳化物的面积比为95％ 在贝氏体结构中为0.18％以上。

公开(公告)号：US20110163512A1

公开(公告)日：2011-07-07

申请号：US12811416

申请日：2009-09-07

申请人： Takeshi Komoto ,  Hitoshi Sakuma ,  Takashi Hirano ,  Hiroyuki Mizuno ,  Shinya Teramoto ,  Masahiro Toda ,  Hiromasa Takada ,  Makoto Okonogi

发明人： Takeshi Komoto ,  Hitoshi Sakuma ,  Takashi Hirano ,  Hiroyuki Mizuno ,  Shinya Teramoto ,  Masahiro Toda ,  Hiromasa Takada ,  Makoto Okonogi

IPC分类号： B62D7/20 ,  C21D8/00

CPC分类号： B62D7/20 ,  B60G7/001 ,  B60G2206/11 ,  B60G2206/8401 ,  B60G2206/8402 ,  C21D1/25 ,  C21D9/0068 ,  C21D9/0075 ,  C21D2211/008 ,  C21D2221/01

摘要： A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

摘要翻译： 钢制拉杆端部包括轴部和第一和第二配合部。 为轴部设置径向截面积较小的最小面积部，最小面积部的钢结构的90％以上由马氏体或回火马氏体形成。 最小面积部分的最小面积部分的表面硬度和最小面积部分的径向横截面的平均硬度为600Hv或以下，第一装配部分的径向横截面的平均硬度和径向横截面的平均硬度 第二装配部的截面为300Hv以下。 制造钢制拉杆端的方法包括将高频加热到奥氏体化温度的预期轴部的淬火工序，然后用水或冷却介质快速冷却前轴部。

公开(公告)号：US07824508B2

公开(公告)日：2010-11-02

申请号：US11990793

申请日：2007-07-27

申请人： Shinya Teramoto ,  Hiromasa Takada

发明人： Shinya Teramoto ,  Hiromasa Takada

IPC分类号： C22C38/12 ,  C22C38/02 ,  C22C38/04

CPC分类号： B21J5/00 ,  C21D7/13 ,  C21D8/0205 ,  C21D8/0231 ,  C21D8/0278 ,  C21D2201/03 ,  C21D2201/05 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/60 ,  Y10S148/902

摘要： The present invention provides a fine grain surface layer steel part having a high proof strength ratio equal to or higher than that of conventional quenched and tempered materials, that is, a fine grain surface layer steel part containing, by mass %, C: 0.45% to 0.70%, Nb: 0.01% to 0.60%, Si: 0.10% to 1.50%, Mn: 0.40% to 2.0%, P: 0.10% or less, S: 0.001% to 0.15%, and N: 0.003% to 0.025% and having a balance of Fe and unavoidable impurities, where the surface layer and inside at all or part of the part have structures of different average particle sizes of ferrite crystal grains surrounded by high angle grain boundaries of a misorientation angle of 15 degrees or more and a method of production of that part comprising warm forging locations where strength is required to a predetermined shape at 1000° C. to 800° C. during which working so as to give an equivalent strain of 1.5 or more.

摘要翻译： 本发明提供一种具有等于或高于常规淬火回火材料的高强度比的细晶粒表层钢部分，即以质量％计含有C：0.45％的细晶粒表层钢部分， 至0.70％，Nb：0.01％〜0.60％，Si：0.10％〜1.50％，Mn：0.40％〜2.0％，P：0.10％以下，S：0.001〜0.15％，N：0.003％〜0.025 ％，并且具有余量的Fe和不可避免的杂质，其中表面层和内部全部或部分具有由15度或更大的取向角度的高角度晶界包围的铁素体晶粒的平均粒径不同的结构 以及该工件的制造方法，其包括在1000℃至800℃下需要强度至预定形状的热锻造位置，在该温度下工作以产生1.5或更大的等效应变。

公开(公告)号：US08186696B2

公开(公告)日：2012-05-29

申请号：US12811416

申请日：2009-09-07

申请人： Takeshi Komoto ,  Hitoshi Sakuma ,  Takashi Hirano ,  Hiroyuki Mizuno ,  Shinya Teramoto ,  Masahiro Toda ,  Hiromasa Takada ,  Makoto Okonogi

发明人： Takeshi Komoto ,  Hitoshi Sakuma ,  Takashi Hirano ,  Hiroyuki Mizuno ,  Shinya Teramoto ,  Masahiro Toda ,  Hiromasa Takada ,  Makoto Okonogi

IPC分类号： B62D7/16

CPC分类号： B62D7/20 ,  B60G7/001 ,  B60G2206/11 ,  B60G2206/8401 ,  B60G2206/8402 ,  C21D1/25 ,  C21D9/0068 ,  C21D9/0075 ,  C21D2211/008 ,  C21D2221/01

摘要： A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

摘要翻译： 钢制拉杆端部包括轴部和第一和第二配合部。 为轴部设置径向截面积较小的最小面积部，最小面积部的钢结构的90％以上由马氏体或回火马氏体形成。 最小面积部分的最小面积部分的表面硬度和最小面积部分的径向横截面的平均硬度为600Hv或以下，第一装配部分的径向横截面的平均硬度和径向横截面的平均硬度 第二装配部的截面为300Hv以下。 制造钢制拉杆端的方法包括将高频加热到奥氏体化温度的预期轴部的淬火工序，然后用水或冷却介质快速冷却前轴部。

公开(公告)号：US20090095383A1

公开(公告)日：2009-04-16

申请号：US11990793

申请日：2007-07-27

申请人： Shinya Teramoto ,  Hiromasa Takada

发明人： Shinya Teramoto ,  Hiromasa Takada

IPC分类号： C21D8/02 ,  C22C38/04

CPC分类号： B21J5/00 ,  C21D7/13 ,  C21D8/0205 ,  C21D8/0231 ,  C21D8/0278 ,  C21D2201/03 ,  C21D2201/05 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/60 ,  Y10S148/902

摘要： The present invention provides a fine grain surface layer steel part having a high proof strength ratio equal to or higher than that of conventional quenched and tempered materials, that is, a fine grain surface layer steel part containing, by mass %, C: 0.45% to 0.70%, Nb: 0.01% to 0.60%, Si: 0.10% to 1.50%, Mn: 0.40% to 2.0%, P: 0.10% or less, S: 0.001% to 0.15%, and N: 0.003% to 0.025% and having a balance of Fe and unavoidable impurities, where the surface layer and inside at all or part of the part have structures of different average particle sizes of ferrite crystal grains surrounded by high angle grain boundaries of a misorientation angle of 15 degrees or more and a method of production of that part comprising warm forging locations where strength is required to a predetermined shape at 1000° C. to 800° C. during which working so as to give an equivalent strain of 1.5 or more.

摘要翻译： 本发明提供一种具有等于或高于常规淬火回火材料的高强度比的细晶粒表层钢部分，即以质量％计含有C：0.45％的细晶粒表层钢部分， 至0.70％，Nb：0.01％〜0.60％，Si：0.10％〜1.50％，Mn：0.40％〜2.0％，P：0.10％以下，S：0.001〜0.15％，N：0.003％〜0.025 ％，并且具有余量的Fe和不可避免的杂质，其中表面层和内部全部或部分具有由15度或更大的取向角度的高角度晶界包围的铁素体晶粒的平均粒径不同的结构 以及该工件的制造方法，其包括在1000℃至800℃下需要强度至预定形状的热锻造位置，在该温度下工作以产生1.5或更大的等效应变。