公开(公告)号：US09523404B2

公开(公告)日：2016-12-20

申请号：US14237949

申请日：2012-08-15

Applicant: Shinya Teramoto ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Manabu Kubota

IPC: C22C38/38 ,  F16F1/02 ,  C21D1/06 ,  C21D6/00 ,  C21D9/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C21D8/06 ,  C22C38/02 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28

CPC classification number: F16F1/02 ,  C21D1/06 ,  C21D6/008 ,  C21D8/065 ,  C21D9/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38

Abstract: The present invention provides a spring steel, which is finally formed into a spring, by making use of, at a maximum, the temper softening resistance effect due to alloying elements while suppressing the formation of hard inclusions of SiO2 and the generation of decarburization, which may cause deterioration of fatigue characteristics of the spring. The spring steel is characterized by comprising, in % by mass, C: 0.50 to 0.70%, Si: 1.00 to 5.00%, Mn: 0.30 to 2.00%, P: 0.0002 to 0.0500%, S: 0.0002 to 0.0500%, Cr: 0.10 to 3.50%, Al: 0.0005 to 0.0500%, and N: 0.0020 to 0.0100%, with the balance being Fe and inevitable impurities, wherein the H-value defined by the following equation (a) is 160 or more, and the C-value defined by the following equation (b) is 3.25 or less: H=33.6[C]+10.0[Si]+5.95[Mn]+11.1[Cr]+90.0  (a), and C=[Si]/[Mn]  (b).

公开(公告)号：US09187797B2

公开(公告)日：2015-11-17

申请号：US13823644

申请日：2012-05-25

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

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

IPC: 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 classification number: 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

Abstract: 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.

Abstract translation: 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：US20100143180A1

公开(公告)日：2010-06-10

申请号：US12450567

申请日：2008-11-05

Applicant: Manabu Kubota ,  Shinya Teramoto

Inventor： Manabu Kubota ,  Shinya Teramoto

IPC: C22C38/60 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18

CPC classification number: C22C38/34 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/60 ,  F16C7/023 ,  F16C9/045 ,  F16C33/121 ,  F16C2204/64

Abstract: The invention provides a hot-forging micro-alloyed steel and a hot-rolled steel which achieve excellent fracture-splitability and machinability, without impairing productivity or mechanical properties and without addition of Pb or the like. It also provides a component made of hot-forged micro-alloyed steel.The hot-forging micro-alloyed steel comprises, in mass %, C: greater than 0.35 to 0.60%, Si: 0.50 to 2.50%, Mn: 0.20 to 2.00%, P: 0.010 to 0.150%, S: 0.040 to 0.150%, V: 0.10 to 0.50%, Zr: 0.0005 to 0.0050%, Ca: 0.0005 to 0.0050% and N: 0.0020 to 0.0200%, Al being limited to less than 0.010%, and a balance substantially of Fe and unavoidable impurities.

Abstract translation: 本发明提供一种在不损害生产率或机械性能并且不添加Pb等的情况下实现优异的断裂分裂性和机械加工性的热锻微合金钢和热轧钢。 它还提供由热锻微合金钢制成的部件。 热锻微合金钢以质量％计含有：C：0.35〜0.60％，Si：0.50〜2.50％，Mn：0.20〜2.00％，P：0.010〜0.150％，S：0.040〜0.150％ ，V：0.10〜0.50％，Zr：0.0005〜0.0050％，Ca：0.0005〜0.0050％，N：0.0020〜0.0200％，Al限制在0.010％以下，余量基本上由Fe和不可避免的杂质构成。

公开(公告)号：US08916008B2

公开(公告)日：2014-12-23

申请号：US13823461

申请日：2012-05-25

Applicant: Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC: 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 classification number: 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

Abstract: 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.

Abstract translation: 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：US08715428B2

公开(公告)日：2014-05-06

申请号：US12450567

申请日：2008-11-05

Applicant: Manabu Kubota ,  Shinya Teramoto

Inventor： Manabu Kubota ,  Shinya Teramoto

IPC: C22C38/00 ,  C22C38/02

CPC classification number: C22C38/34 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/60 ,  F16C7/023 ,  F16C9/045 ,  F16C33/121 ,  F16C2204/64

Abstract: The invention provides a hot-forging micro-alloyed steel and a hot-rolled steel which achieve excellent fracture-splitability and machinability, without impairing productivity or mechanical properties and without addition of Pb or the like. It also provides a component made of hot-forged micro-alloyed steel. The hot-forging micro-alloyed steel contains, in mass %, C: greater than 0.35 to 0.60%, Si: 0.50 to 2.50%, Mn: 0.20 to 2.00%, P: 0.010 to 0.150%, S: 0.040 to 0.150%, V: 0.10 to 0.50%, Zr: 0.0005 to 0.0050%, Ca: 0.0005 to 0.0050% and N: 0.0069 to 0.0200%, Al being limited to less than 0.010%, and a balance of Fe and unavoidable impurities.

Abstract translation: 本发明提供一种在不损害生产率或机械性能并且不添加Pb等的情况下实现优异的断裂分裂性和机械加工性的热锻微合金钢和热轧钢。 它还提供由热锻微合金钢制成的部件。 热锻微合金钢以质量％计含有：C：0.35〜0.60％，Si：0.50〜2.50％，Mn：0.20〜2.00％，P：0.010〜0.150％，S：0.040〜0.150％ ，V：0.10〜0.50％，Zr：0.0005〜0.0050％，Ca：0.0005〜0.0050％，N：0.0069〜0.0200％，Al限制在0.010％以下，余量由Fe和不可避免的杂质构成。

公开(公告)号：US08926767B2

公开(公告)日：2015-01-06

申请号：US13823655

申请日：2012-05-25

Applicant: Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

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

CPC classification number: C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D2211/002 ,  C21D2211/004

Abstract: 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.

Abstract translation: 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：US20140193288A1

公开(公告)日：2014-07-10

申请号：US14237949

申请日：2012-08-15

Applicant: Shinya Teramoto ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Manabu Kubota

IPC: F16F1/02 ,  C22C38/34 ,  C22C38/26 ,  C22C38/00 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/38 ,  C22C38/24

CPC classification number: F16F1/02 ,  C21D1/06 ,  C21D6/008 ,  C21D8/065 ,  C21D9/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38

Abstract: The present invention provides a spring steel, which is finally formed into a spring, by making use of, at a maximum, the temper softening resistance effect due to alloying elements while suppressing the formation of hard inclusions of SiO2 and the generation of decarburization, which may cause deterioration of fatigue characteristics of the spring. The spring steel is characterized by comprising, in % by mass, C: 0.50 to 0.70%, Si: 1.00 to 5.00%, Mn: 0.30 to 2.00%, P: 0.0002 to 0.0500%, S: 0.0002 to 0.0500%, Cr: 0.10 to 3.50%, Al: 0.0005 to 0.0500%, and N: 0.0020 to 0.0100%, with the balance being Fe and inevitable impurities, wherein the H-value defined by the following equation (a) is 160 or more, and the C-value defined by the following equation (b) is 3.25 or less: H=33.6[C]+10.0[Si]+5.95[Mn]+11.1[Cr]+90.0  (a), and C=[Si]/[Mn]  (b).

Abstract translation: 本发明提供一种弹簧钢，其最终通过最大程度地利用由于合金元素而产生的回火软化阻力效应，同时抑制SiO 2的硬夹杂物的形成和脱碳的产生而最终形成为弹簧，其中 可能导致弹簧的疲劳特性恶化。 弹簧钢的特征在于，以质量％计含有C：0.50〜0.70％，Si：1.00〜5.00％，Mn：0.30〜2.00％，P：0.0002〜0.0500％，S：0.0002〜0.0500％，Cr： 0.10〜3.50％，Al：0.0005〜0.0500％，N：0.0020〜0.0100％，余量为Fe和不可避免的杂质，其中由下式（a）定义的H值为160以上，C 由下式（b）定义的值为3.25以下：H = 33.6 [℃] +10.0 [Si] +5.95 [Mn] +11.1 [Cr] +90.0（a），C = [Si] / [ Mn]（b）。

公开(公告)号：US20130186529A1

公开(公告)日：2013-07-25

申请号：US13823644

申请日：2012-05-25

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

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

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US20130186528A1

公开(公告)日：2013-07-25

申请号：US13823461

申请日：2012-05-25

Applicant: Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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

Applicant: Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

Inventor： Shinya Teramoto ,  Hiromasa Takada ,  Manabu Kubota

IPC: C21D8/00

CPC classification number: C21D8/005 ,  B21J1/003 ,  C21D1/20 ,  C21D2211/002 ,  C21D2211/004

Abstract: 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.

Abstract translation: 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。