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1. 发明申请

US20130243641A1 ROLLED STEEL BAR OR WIRE FOR HOT FORGING 有权
标题翻译：用于锻造的轧制钢棒或钢丝
公开(公告)号：US20130243641A1
公开(公告)日：2013-09-19
申请号：US13989847
申请日：2011-11-28
申请人： Yoshihiro Daitoh , Hideki Imataka , Masayuki Horimoto , Akira Shiga
发明人： Yoshihiro Daitoh , Hideki Imataka , Masayuki Horimoto , Akira Shiga
IPC分类号： C22C38/50 , C22C38/42 , C22C38/28 , C22C38/26 , C22C38/00 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/44 , C22C38/22
CPC分类号： C22C38/50 , C21D6/00 , C21D8/0226 , C21D8/065 , C21D9/32 , C21D9/52 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C1/02 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44
摘要： A rolled steel bar or a wire rod for hot forging capable of coping with both bending/surface fatigue strength of components and machinability at a high level includes: a composition containing, in mass %, C: 0.1 to 0.25%, Si: 0.01 to 0.10%, Mn: 0.4 to 1.0%, S: 0.003 to 0.05%, Cr: 1.60 to 2.00%, Mo: 0.10% or less (including 0%), Al: 0.025 to 0.05%, and N: 0.010 to 0.025%, where a value of fn1 represented in a following formula (1) satisfies 1.82≦fn1≦2.10: fn1=Cr+2×Mo (1); impurities containing P: 0.025% or less, Ti: 0.003% or less, and O (oxygen): 0.002% or less; and a cross section in which a maximum value/a minimum value of an average ferrite grain diameter is 2.0 or less when measurement by observation is randomly carried out in 15 visual fields with an area per visual field set to be 62500 μm2.
摘要翻译：能够应对组分的弯曲/表面疲劳强度和高水平的机械加工性的热轧钢棒或热锻钢线包括：以质量％计含有C：0.1〜0.25％的Si：0.01〜 0.10％，Mn：0.4〜1.0％，S：0.003〜0.05％，Cr：1.60〜2.00％，Mo：0.10％以下（含0％），Al：0.025〜0.05％，N：0.010〜0.025％（1）表示的fn1的值满足1.82 @ fn1 @ 2.10：fn1 = Cr + 2×Mo（1）; 含有P：0.025％以下，Ti：0.003％以下，O（氧）：0.002％以下的杂质; 以及当通过观察测量的平均铁素体晶粒直径的最大值/最小值在具有设定为62500mum2的视场的15个视野中随机地进行的横截面。

2. 发明授权

US09200354B2 Rolled steel bar or wire for hot forging 有权
标题翻译：用于热锻的轧制钢筋或钢丝
公开(公告)号：US09200354B2
公开(公告)日：2015-12-01
申请号：US13989847
申请日：2011-11-28
申请人： Yoshihiro Daitoh , Hideki Imataka , Masayuki Horimoto , Akira Shiga
发明人： Yoshihiro Daitoh , Hideki Imataka , Masayuki Horimoto , Akira Shiga
IPC分类号： C22C38/18 , C22C38/22 , C22C38/50 , C21D6/00 , C21D9/32 , C21D9/52 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/28 , C22C38/20 , C22C38/26 , C22C38/42 , C22C38/44 , C21D8/02 , C21D8/06 , C22C1/02
CPC分类号： C22C38/50 , C21D6/00 , C21D8/0226 , C21D8/065 , C21D9/32 , C21D9/52 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C1/02 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44
摘要： A rolled steel bar or a wire rod for hot forging capable of coping with both bending/surface fatigue strength of components and machinability at a high level includes: a composition containing, in mass %, C: 0.1 to 0.25%, Si: 0.01 to 0.10%, Mn: 0.4 to 1.0%, S: 0.003 to 0.05%, Cr: 1.60 to 2.00%, Mo: 0.10% or less (including 0%), Al: 0.025 to 0.05%, and N: 0.010 to 0.025%, where a value of fn1 represented in a following formula (1) satisfies 1.82≦fn1≦2.10: fn1=Cr+2×Mo (1); impurities containing P: 0.025% or less, Ti: 0.003% or less, and O (oxygen): 0.002% or less; and a cross section in which a maximum value/a minimum value of an average ferrite grain diameter is 2.0 or less when measurement by observation is randomly carried out in 15 visual fields with an area per visual field set to be 62500 μm2.
摘要翻译：能够应对组分的弯曲/表面疲劳强度和高水平的机械加工性的热轧钢棒或热锻钢线包括：以质量％计含有C：0.1〜0.25％的Si：0.01〜 0.10％，Mn：0.4〜1.0％，S：0.003〜0.05％，Cr：1.60〜2.00％，Mo：0.10％以下（含0％），Al：0.025〜0.05％，N：0.010〜（1）表示的fn1的值满足1.82＆nlE; fn1＆nlE; 2.10：fn1 = Cr + 2×Mo（1）; 含有P：0.025％以下，Ti：0.003％以下，O（氧）：0.002％以下的杂质; 以及当以每视野面积设定为62500μm2的15个视场中随机地进行观察测量时，平均铁素体晶粒直径的最大值/最小值为2.0以下的截面。

3. 发明授权

US10329645B2 Steel for carburizing or carbonitriding use 有权
公开(公告)号：US10329645B2
公开(公告)日：2019-06-25
申请号：US13980922
申请日：2012-01-23
申请人： Yoshihiro Daitoh
发明人： Yoshihiro Daitoh
IPC分类号： C22C38/18 , C22C38/00 , C23C8/22 , C23C8/32 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/50 , C21D7/13 , C21D9/32 , C21D1/06
摘要： A steel for carburizing or carbonitriding use consisting of, by mass %, C: 0.1 to 0.3%, Si: 0.01 to 0.15%, Mn: 0.6 to 1.5%, S: 0.012 to 0.05%, Cr: 0.5 to 2.0%, Al: 0.030 to 0.050%, Ti: 0.0006 to 0.0025%, N: 0.010 to 0.025%, and O: 0.0006 to 0.0012%, and, optionally, at least one selected from Mo≤0.5%, Ni≤1.5% and Cu≤0.4%, and the balance of Fe and impurities. P and Nb are P≤0.025% and Nb≤0.003% respectively. Formulas of [−5.0≤log (Ti×N)≤−4.4] and [−12.5≤log (Al2×O3)≤−11.7] are satisfied. Austenite grain coarsening is prevented even when the steel is heated in the process of carburizing or carbonitriding, and even under various hot forging temperatures. The steel has excellent bending fatigue strength after carburizing or carbonitriding.

4. 发明申请

US20140030137A1 STEEL FOR CARBURIZING OR CARBONITRIDING USE 审中-公开
标题翻译：加碳或碳化钢使用
公开(公告)号：US20140030137A1
公开(公告)日：2014-01-30
申请号：US13980922
申请日：2012-01-23
申请人： Yoshihiro Daitoh
发明人： Yoshihiro Daitoh
IPC分类号： C22C38/18 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/04
CPC分类号： C22C38/18 , C21D1/06 , C21D7/13 , C21D9/32 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/50 , C23C8/22 , C23C8/32
摘要： A steel for carburizing or carbonitriding use consisting of, by mass %, C: 0.1 to 0.3%, Si: 0.01 to 0.15%, Mn: 0.6 to 1.5%, S: 0.012 to 0.05%, Cr: 0.5 to 2.0%, Al: 0.030 to 0.050%, Ti: 0.0006 to 0.0025%, N: 0.010 to 0.025%, and 0: 0.0006 to 0.0012%, and, optionally, at least one selected from Mo≦0.5%, Ni≦1.5% and Cu≦0.4%, and the balance of Fe and impurities. P and Nb are P≦0.025% and Nb≦0.003% respectively. Formulas of [−5.0≦log(Ti×N)≦−4.4] and [−12.5≦log(Al2×O3≦−11.7] are satisfied. Austenite grain coarsening is prevented even when the steel is heated in the process of carburizing or carbonitriding, and even under various hot forging temperatures. The steel has excellent bending fatigue strength after carburizing or carbonitriding.
摘要翻译：用于渗碳或碳氮共渗用途的钢，以质量％计含有C：0.1〜0.3％，Si：0.01〜0.15％，Mn：0.6〜1.5％，S：0.012〜0.05％，Cr：0.5〜2.0％：0.030〜0.050％，Ti：0.0006〜0.0025％，N：0.010〜0.025％，0：0.0006〜0.0012％，可选地，选自Mo@0.5%，Ni@1.5%，Cu @ 0.4 ％，余量为Fe和杂质。 P和Nb分别为P@0.025%和Nb@0.003%。 [-5.0@log（Ti×N）@ - 4.4]和[-12.5@log（Al2×O3@-11.7）的公式被满足，即使在渗碳过程中钢被加热也可以防止奥氏体晶粒粗化碳氮共渗，甚至在各种热锻温度下，渗碳或碳氮共渗具有优异的弯曲疲劳强度。

5. 发明申请

US20140363329A1 ROLLED STEEL BAR OR WIRE ROD FOR HOT FORGING 审中-公开
标题翻译：轧制钢棒或钢丝绳用于锻造
公开(公告)号：US20140363329A1
公开(公告)日：2014-12-11
申请号：US14241556
申请日：2012-08-22
申请人： Akira Shiga , Masayuki Horimoto , Yoshihiro Daitoh , Hideki Imataka , Yusuke Usui , Tetsuya Ohashi
发明人： Akira Shiga , Masayuki Horimoto , Yoshihiro Daitoh , Hideki Imataka , Yusuke Usui , Tetsuya Ohashi
IPC分类号： C22C38/28 , C22C38/06 , C22C38/22 , C22C38/02 , C22C38/00 , C22C38/26 , C22C38/18 , C22C38/04
CPC分类号： C22C38/28 , C21D8/065 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/26
摘要： A rolled steel bar or wire rod having hot surface fatigue strength, wear resistance, and machinability even after hot forging has a composition containing C, Si, Mn, S, Cr, Mo (optional), Al, and N, with the balance being Fe and impurities. The chemical composition satisfies that fn1 defined by Formula (1) is 1.60 to 2.10. The structure of the rolled steel bar or wire rod for hot forging includes a ferrite-pearlite structure, a ferrite-pearlite-bainite structure, or a ferrite-bainite structure. A maximum value/a minimum value of average ferrite grain size, which is observed and measured randomly in 15 visual fields each having an area of 62500 μm2 in a cross section, is not more than 2.0. fn1=Cr+2×Mo (1), and each symbol of elements in Formula (1) is substituted by a content (mass %) of a corresponding element.
摘要翻译：即使在热锻后也具有热表面疲劳强度，耐磨性和切削性的轧制钢棒或线材具有包含C，Si，Mn，S，Cr，Mo（任选的），Al和N的组成，其余为铁和杂质。化学成分满足式（1）所定义的fn1为1.60〜2.10。用于热锻的轧制钢筋或线材的结构包括铁素体 - 珠光体组织，铁素体 - 珠光体 - 贝氏体组织或铁素体 - 贝氏体组织。平均铁素体晶粒尺寸的最大值/最小值在截面中每个面积为62500μm2的15个视场中随机观察和测量，不大于2.0。 fn1 = Cr + 2×Mo（1），式（1）中的各元素的符号被相应元素的含量（质量％）代替。

6. 发明授权

US08491732B2 Hot-rolled steel bar or wire rod 有权
标题翻译：热轧钢筋或线材
公开(公告)号：US08491732B2
公开(公告)日：2013-07-23
申请号：US13461125
申请日：2012-05-01
申请人： Yoshihiro Daitoh , Akira Kito , Takayuki Nakamura
发明人： Yoshihiro Daitoh , Akira Kito , Takayuki Nakamura
IPC分类号： C22C38/18 , C22C38/22 , C22C38/44
CPC分类号： C21D8/065 , C21D1/18 , C21D6/002 , C21D9/00 , C21D9/0075 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/28 , C23C8/02
摘要： A hot-rolled steel bar or wire rod consisting of C: 0.1 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.4 to 2.0%, S: 0.003 to 0.05%, Cr: 0.5 to 3.0%, Al: 0.02 to 0.05%, and N: 0.010 to 0.025%, the balance being Fe and impurities, and the impurities containing P: 0.025% or less, Ti: 0.003% or less, and O: 0.002% or less, wherein the structure thereof is composed of a ferrite-pearlite structure, ferrite-pearlite-bainite structure, or ferrite-bainite structure; the standard deviation of ferrite fractions at the time when randomly selected 15 viewing fields of a transverse cross section are observed and measured with the area per one viewing field being 62,500 μm2 is 0.10 or less; and in a region from the surface to one-fifth of the radius and a region from the center to one-fifth of the radius in the transverse cross section, the amount of Al precipitating as AlN is 0.005% or less, and the density in terms of the number of AlN having a diameter of 100 nm or larger is 5/100 μm2 or less. In the hot-rolled steel bar or wire rod, even if hot forging is performed in various temperature ranges, austenite grains can be stably prevented from being coarsened at the time of heating for carburization.
摘要翻译：由C：0.1〜0.3％，Si：0.05〜1.5％，Mn：0.4〜2.0％，S：0.003〜0.05％，Cr：0.5〜3.0％，Al：0.02〜 0.05％，N：0.010〜0.025％，余量为Fe和杂质，含有P：0.025％以下，Ti：0.003％以下，O：0.002％以下的杂质，其结构为铁素体 - 珠光体组织，铁素体 - 珠光体 - 贝氏体组织或铁素体 - 贝氏体组织; 当观察并测量随机选择的横截面的15个视场时，每个视野的面积为62,500mum2的铁素体部分的标准偏差为0.10或更小; 并且在从半径的表面到五分之一的区域和从横截面的半径的中心到五分之一的区域中，作为AlN的Al析出量为0.005％以下，直径为100nm以上的AlN的数量的项为5/100mum2以下。在热轧钢棒或线材中，即使在各种温度范围内进行热锻造，也可以稳定地防止在加热加热时使奥氏体晶粒粗大化。

7. 发明申请

US20120263622A1 HOT-ROLLED STEEL CAR OR WIRE ROD 有权
标题翻译：热轧钢车或钢丝绳
公开(公告)号：US20120263622A1
公开(公告)日：2012-10-18
申请号：US13461125
申请日：2012-05-01
申请人： Yoshihiro Daitoh , Akira Kito , Takayuki Nakamura
发明人： Yoshihiro Daitoh , Akira Kito , Takayuki Nakamura
IPC分类号： C22C38/38 , C22C38/06 , C22C38/08 , C22C38/58 , C22C38/18 , C22C38/22
CPC分类号： C21D8/065 , C21D1/18 , C21D6/002 , C21D9/00 , C21D9/0075 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/28 , C23C8/02
摘要： A hot-rolled steel bar or wire rod consisting of C: 0.1 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.4 to 2.0%, S: 0.003 to 0.05%, Cr: 0.5 to 3.0%, Al: 0.02 to 0.05%, and N: 0.010 to 0.025%, the balance being Fe and impurities, and the impurities containing P: 0.025% or less, Ti: 0.003% or less, and O: 0.002% or less, wherein the structure thereof is composed of a ferrite-pearlite structure, ferrite-pearlite-bainite structure, or ferrite-bainite structure; the standard deviation of ferrite fractions at the time when randomly selected 15 viewing fields of a transverse cross section are observed and measured with the area per one viewing field being 62,500 μm2 is 0.10 or less; and in a region from the surface to one-fifth of the radius and a region from the center to one-fifth of the radius in the transverse cross section, the amount of Al precipitating as AlN is 0.005% or less, and the density in terms of the number of AlN having a diameter of 100 nm or larger is 5/100 μm2 or less. In the hot-rolled steel bar or wire rod, even if hot forging is performed in various temperature ranges, austenite grains can be stably prevented from being coarsened at the time of heating for carburization.
摘要翻译：由C：0.1〜0.3％，Si：0.05〜1.5％，Mn：0.4〜2.0％，S：0.003〜0.05％，Cr：0.5〜3.0％，Al：0.02〜 0.05％，N：0.010〜0.025％，余量为Fe和杂质，含有P：0.025％以下，Ti：0.003％以下，O：0.002％以下的杂质，其结构为的铁素体 - 珠光体组织，铁素体 - 珠光体 - 贝氏体组织或铁素体 - 贝氏体组织; 在每个视场的面积为62,500μm2的情况下观察和测量随机选择的横截面的15个视野时的铁素体部分的标准偏差为0.10以下; 并且在从半径的表面到五分之一的区域和从横截面的半径的中心到五分之一的区域中，作为AlN的Al析出量为0.005％以下，直径为100nm以上的AlN的数量的项为5/100μm2以下。在热轧钢棒或线材中，即使在各种温度范围内进行热锻造，也可以稳定地防止在加热加热时使奥氏体晶粒粗大化。

8. 发明授权

US5899516A Railway wheel and manufacturing method of the railway wheel 失效
标题翻译：铁路车轮和铁路车轮的制造方法
公开(公告)号：US5899516A
公开(公告)日：1999-05-04
申请号：US787218
申请日：1997-01-22
申请人： Takashi Fujimura , Manao Anjiki , Taizo Makino , Yoshihiro Daitoh
发明人： Takashi Fujimura , Manao Anjiki , Taizo Makino , Yoshihiro Daitoh
IPC分类号： B60B17/00 , C21D1/84 , C21D9/34 , C22C38/00 , C22C38/18 , B60B37/00
CPC分类号： B60B17/00 , C21D1/84 , C21D9/34
摘要： A wheel has both wear resistance and heat-crack resistance sufficient for use in a high-speed railway vehicle. The chemical composition of a base steel comprises 0.4 to 0.75 % C, 0.4 to 0.95% Si, 0.6 to 1.2% Mn and less than 0.2% Cr. The wheel has a pearlitic microstructure in a region of at least 50 mm in depth from the tread surface of the wheel. When the tread of the wheel is quenched, a particular cooling process is applied in order to obtain the pearlitic structure.
摘要翻译：轮具有足以用于高速铁路车辆的耐磨性和耐热裂纹性。基础钢的化学成分包含0.4〜0.75％的C，0.4〜0.95％的Si，0.6〜1.2％的Mn和小于0.2％的Cr。该车轮在与车轮的胎面表面相距至少50mm的区域中具有珠光体组织。当车轮的胎面被淬火时，应用特定的冷却过程以获得珠光体结构。

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