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1. 发明申请

US20180347025A1 STEEL, CARBURIZED STEEL COMPONENT, AND METHOD FOR MANUFACTURING CARBURIZED STEEL COMPONENT 审中-公开
公开(公告)号：US20180347025A1
公开(公告)日：2018-12-06
申请号：US15778153
申请日：2016-11-25
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Akira SHIGA , Hajime HASEGAWA , Manabu KUBOTA , Hideo MIZUKAMI
IPC分类号： C23C8/22 , C23C8/32 , C23C8/80 , C21D9/32 , C21D9/28 , C21D8/00 , C21D1/06 , C22C38/54 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
CPC分类号： C21D1/06 , C21D8/06 , C21D9/28 , C21D9/32 , C22C38/00 , C22C38/60 , C23C8/22 , C23C8/80
摘要： A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, an AlN precipitation index IAlN ranges from greater than 0.00030 to smaller than 0.00110, a metallographic structure includes ferrite ranging from 85 to 100 area %, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 μm or greater to smaller than 2 μm, is shorter than 30.0 μm, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 μm or greater to smaller than 2 μm, is 300 pieces/mm2 or more.

2. 发明授权

US09976206B2 Rolled round steel material for steering rack bar, and steering rack bar 有权
公开(公告)号：US09976206B2
公开(公告)日：2018-05-22
申请号：US14911804
申请日：2014-06-18
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Makoto Egashira , Sadanori Horikami , Masashi Higashida , Takahiro Okada , Yutaka Neishi , Tatsuya Hasegawa , Hitoshi Matsumoto
IPC分类号： C22C38/28 , C22C38/50 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , B21B1/16 , F16H55/26 , B62D3/12 , C22C38/60 , C22C38/00 , C22C38/38 , C22C38/58 , C21D9/00 , C21D9/28 , B21B3/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/54 , C21D8/06
CPC分类号： C22C38/60 , B21B1/16 , B21B3/02 , B62D3/12 , C21D1/10 , C21D1/18 , C21D7/06 , C21D8/06 , C21D9/0075 , C21D9/28 , C21D2211/003 , C21D2211/005 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/50 , C22C38/54 , C22C38/58
摘要： A rolled round steel material contains C: 0.38 to 0.55%, Si: 1.0% or less, Mn: 0.20 to 2.0%, S: 0.005 to 0.10%, Cr: 0.01 to 2.0%, Al: 0.003 to 0.10%, B: 0.0005 to 0.0030%, Ti: 0.047% or less, Cu: 0 to 1.0%, Ni: 0 to 3.0%, Mo: 0 to 0.50%, Nb: 0 to 0.10%, V: 0 to 0.30%, Ca: 0 to 0.005%, and Pb: 0 to 0.30%, a remaining portion being constituted by Fe and an impurities, the impurities containing P in an amount of 0.030% or less and N in an amount of 0.008% or less, and has a chemical composition satisfying [3.4N≤Ti≤3.4N+0.02]. The microstructure is constituted by ferrite (F), lamellar pearlite (LP), and cementite (C) and microstructural features vary in terms of the lateral, longitudinal and central portions of the steel. This steel material has a high base material toughness and good machinability without performing thermal refining.

3. 发明申请

US20170088924A1 Alloy for Mud Motor Shaft Applications with High Strength, High Impact Toughness and Excellent Fatigue Life 审中-公开
公开(公告)号：US20170088924A1
公开(公告)日：2017-03-30
申请号：US15278125
申请日：2016-09-28
申请人： CRS HOLDINGS, INC.
发明人： Paul M. Novotny
IPC分类号： C22C38/58 , C22C38/46 , C22C38/44 , C22C38/42 , F16C3/02 , C22C38/02 , C22C38/00 , C21D9/28 , E21B4/02 , C22C38/50 , C22C38/06
CPC分类号： C22C38/58 , C21D1/18 , C21D1/25 , C21D1/58 , C21D9/00 , C21D9/28 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , E21B4/02 , F16C3/02 , F16C2204/62 , F16C2204/70
摘要： A steel alloy is disclosed that provides a unique combination of strength, toughness, and fatigue life. The steel alloy has the following composition in weight percent. C about 0.15 to about 0.30 Mn about 1.7 to about 2.3 Si about 0.7 to about 1.1 Cr about 1.85 to about 2.35 Ni about 0.5 to about 0.9 Mo+½W about 0.1 to about 0.3 Cu about 0.3 to about 0.7 V+ 5/9×Nb about 0.2 to about 0.5 The balance of the alloy is iron, usual impurities, and residual amounts of other elements added during melting for deoxidizing and/or desulfurizing the alloy. A hardened and tempered steel article made from the alloy is also disclosed.

4. 发明授权

US09429183B2 Martensitic steel with mixed hardening 有权
标题翻译：马氏体钢混合硬化
公开(公告)号：US09429183B2
公开(公告)日：2016-08-30
申请号：US13943508
申请日：2013-07-16
申请人： SNECMA , Aubert & Duval
发明人： Laurent Ferrer , Philippe Heritier
IPC分类号： C22C38/06 , C22C38/52 , F16C3/02 , C21D1/06 , C21D1/18 , C21D6/00 , C21D9/28 , C22C38/08 , C22C38/40
CPC分类号： F16C3/02 , C21D1/06 , C21D1/18 , C21D6/00 , C21D6/001 , C21D6/004 , C21D9/28 , C21D2211/008 , C22C38/06 , C22C38/08 , C22C38/40 , C22C38/52
摘要： The invention relates to a method of producing a martensitic steel comprising a content of other metals such that it can be hardened by intermetallic compound and carbide precipitation, with an Al content of between 0.4% and 3%. The heat shaping temperature of the last heat shaping pass of said steel is lower than the solubility temperature of the aluminum nitrides in the steel, and the treatment temperature for each potential heat treatment after said last heat shaping pass is lower than the solid-state solubility temperature of the aluminum nitrides in said steel.
摘要翻译：本发明涉及一种马氏体钢的制造方法，其包含其他金属的含量，使得其可以通过金属间化合物和碳化物沉淀而硬化，Al含量在0.4％至3％之间。所述钢的最后一次热成型通过的热成形温度低于钢中氮化铝的溶解度温度，并且在最后一次热成形之后的每个潜热处理的处理温度低于固态溶解度所述钢中的氮化铝的温度。

5. 发明申请

US20160145732A1 CARBURIZED COMPONENT 审中-公开
标题翻译：加固组件
公开(公告)号：US20160145732A1
公开(公告)日：2016-05-26
申请号：US14899878
申请日：2014-06-24
申请人： DAIDO STEEL CO., LTD.
发明人： Kyohei NAKAYAMA , Yasuaki SAKAI , Toshiyuki MORITA , Keisuke INOUE
IPC分类号： C23C8/22 , C22C38/50 , C22C38/48 , C22C38/44 , C21D9/00 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/54 , C22C38/42
CPC分类号： C23C8/22 , C21D1/06 , C21D9/0068 , C21D9/28 , C21D9/32 , C21D9/40 , C21D2211/004 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/60
摘要： The present invention provides a carburized part having a total amount of TiC, AlN and ZrC, which are precipitate particles, of 4.5×10−10 mole or less per 1 mm2 of grain boundary area of prior austenite grains after carburization. According to the present invention, it is possible to provide a carburized part which allows effective inhibition of abnormal grain growth in spite of a carburizing treatment and makes it possible to solve the problem of reduction in properties caused by abnormal grain growth.
摘要翻译：本发明提供一种渗碳部分，其具有作为沉淀颗粒的TiC，AlN和ZrC的总量，每渗透后的原奥氏体晶粒的每1mm 2的晶界面积为4.5×10 -10摩尔或更小。根据本发明，可以提供渗碳部分，其可以有效抑制异常晶粒生长，尽管渗碳处理，并且可以解决由异常晶粒生长引起的性能降低的问题。

6. 发明授权

US09284632B2 Steel for nitrocarburizing, nitrocarburized steel part, and producing method of nitrocarburized steel part 有权
标题翻译：用于氮碳共渗，氮碳共渗钢部分的钢和氮碳共渗钢部件的制造方法
公开(公告)号：US09284632B2
公开(公告)日：2016-03-15
申请号：US13138992
申请日：2011-01-25
申请人： Manabu Kubota
发明人： Manabu Kubota
IPC分类号： C23C8/80 , C22C38/18 , C23C8/00 , C22C38/16 , C22C38/08 , C22C38/00 , C22C38/14 , C22C38/12 , C22C38/02 , C21D1/06 , C21D1/28 , C21D9/28 , C21D9/32 , C21D9/40 , C22C38/04 , C22C38/06 , C23C8/24 , C23C8/26 , C23C8/32 , C23C8/48 , C23C8/74
CPC分类号： C22C38/50 , C21D1/06 , C21D1/28 , C21D8/1255 , C21D9/28 , C21D9/32 , C21D9/40 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/28 , C22C38/42 , C23C8/24 , C23C8/26 , C23C8/32 , C23C8/48 , C23C8/74
摘要： Steel for nitrocarburizing includes, by mass %, C: 0% to less than 0.15%; Si: 0.01% to 1.00%; Mn: 0.01% to 1.00%; S: 0.0001% to 0.050%; Al: 0.0001% to 0.050%; Ti: more than 0.50% to 1.50%; N: 0.0005% to 0.0100%; and the balance consisting of Fe and inevitable impurities, in which P is limited to 0.050% or less; O is limited to 0.0060% or less; and the amount of Ti [Ti %], the amount of C [C %], the amount of N [N %], and the amount of S [S %] satisfy 0.48
摘要翻译：用于氮碳共渗的钢包括质量％C：0％至小于0.15％; Si：0.01〜1.00％ Mn：0.01〜1.00％ S：0.0001％〜0.050％; Al：0.0001％〜0.050％ Ti：大于0.50％〜1.50％; N：0.0005〜0.0100％余量由Fe和不可避免的杂质组成，其中P为0.050％以下; O限制在0.0060％以下; 并且Ti [Ti％]的量，C [C％]的量，N [N％]的量和S [S％]的量满足0.48 <[Ti％] -47.9×（[C ％] / 12+ [N％] / 14+ [S％] / 32）＆nlE; 1.20。

7. 发明申请

US20150218682A1 Machine Structural Steel Material Having Low Heat-Treatment Deformation 审中-公开
标题翻译：机械结构钢材料具有低热处理变形
公开(公告)号：US20150218682A1
公开(公告)日：2015-08-06
申请号：US14425420
申请日：2013-09-03
申请人： Sanyo Special Steel Co., Ltd.
发明人： Takeshi Fujimatsu , Morihiko Nakasaki
IPC分类号： C22C38/50 , C22C38/44 , C22C38/00 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/48 , C22C38/42
CPC分类号： C22C38/50 , C21D9/28 , C21D9/32 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48
摘要： There is provided a steel material with small heat treatment deformation, comprising a machine structural steel used for components for power transmission, such as gears and shafts used in automobiles, industrial machines, and the like. In the steel material, the Ms point of the steel material comprising a machine structural steel, comprising in mass %: C: 0.20 to 0.30%; Si: 0.10 to 1.50%; Mn: 0.10 to 1.20%; P: 0.030% or less; S: 0.030% or less; Cr: 1.30 to 2.50%; Cu: 0.30% or less; Al: 0.008 to 0.300%; O: 0.0030% or less; and N: 0.0020 to 0.0300%; and the balance Fe and unavoidable impurities, is 460° C. or less; a ratio (J9/J1.5) of hardness J9 at a distance of 9 mm from the quenched end of the steel material to hardness J1.5 at a distance of 1.5 mm from the quenched end of the steel material, as measured by Jominy end quenching method, is in a range of from 0.70 to 0.85; and a ratio (J11/J1.5) of hardness J11 at a distance of 11 mm from the quenched end of the steel material to hardness J1.5 is in a range of from 0.67 to 0.78.
摘要翻译：提供了一种具有小的热处理变形的钢材，包括用于动力传递部件的机械结构钢，例如用于汽车的齿轮和轴，工业机械等。在钢材中，包含机械结构钢的钢材的Ms点，质量％：C：0.20〜0.30％; Si：0.10〜1.50％ Mn：0.10〜1.20％ P：0.030％以下; S：0.030％以下; Cr：1.30〜2.50％ Cu：0.30％以下; Al：0.008〜0.300％ O：0.0030％以下; N：0.0020〜0.0300％余量为Fe和不可避免的杂质，为460℃以下; 在与钢材淬火端距离为1.5mm的距离处，从钢材淬火端到硬度J1.5的距离为9mm的硬度J9的比（J9 / J1.5），由Jominy 末端淬火法，在0.70〜0.85的范围内; 与钢材的淬火端相比，硬度J11的比例（J11 / J1.5）为11mm，硬度为J1.5的范围为0.67〜0.78。

8. 发明授权

US08845831B2 Heat treatment method 有权
标题翻译：热处理方法
公开(公告)号：US08845831B2
公开(公告)日：2014-09-30
申请号：US12322418
申请日：2009-02-02
申请人： Seiichi Sawatsubashi , Keiichi Kubo
发明人： Seiichi Sawatsubashi , Keiichi Kubo
IPC分类号： C21D1/19 , C21D1/63 , C21D9/00 , C21D6/00 , C21D9/28 , C21D1/42 , C21D1/62
CPC分类号： C21D1/19 , C21D1/42 , C21D1/62 , C21D1/63 , C21D6/00 , C21D9/0006 , C21D9/0062 , C21D9/28 , C21D2211/008 , Y02P10/253
摘要： There is provided a heat treatment method in which high-quality tempering treatment can be performed in a short period of time. In this method, when an object to be treated is tempered after being quenched, the object to be treated is rapidly cooled to a 90% martensite transformation finishing temperature without being cooled to the ordinary temperature after quench heating, and then is subjected to 100% martensite transformation by using a 100° C. liquid, and thereafter, tempering treatment is performed after the whole of the object to be treated is soaked by using the 100° C. liquid.
摘要翻译：提供了能够在短时间内进行高品质回火处理的热处理方法。在该方法中，当淬火后待处理对象被回火时，待淬火处理的物体在淬火加热后不被冷却至常温而迅速冷却至90％马氏体相变终轧温度，然后进行100％通过使用100℃的液体进行马氏体相变，然后在使用100℃的液体浸渍整个待处理物体之后进行回火处理。

9. 发明申请

US20140041768A1 FABRICATION METHOD FOR STEPPED FORGED MATERIAL 有权
标题翻译：步进锻造材料的制造方法
公开(公告)号：US20140041768A1
公开(公告)日：2014-02-13
申请号：US14112171
申请日：2012-04-24
申请人： Shinya Nagao , Etsuo Fujita
发明人： Shinya Nagao , Etsuo Fujita
IPC分类号： C21D8/06
CPC分类号： C21D8/065 , B21J1/04 , B21J1/06 , B21K1/10 , C21D6/004 , C21D7/13 , C21D8/005 , C21D9/28 , C21D2211/001
摘要： Provided is a method for fabricating a stepped forged material that can realize a uniform microscopic structure in both the large diameter flange portion and the small diameter shaft portion. This method for fabricating a stepped forged material comprises the following steps: a step for obtaining a primary forged material in which an austenite stainless steel billet is heated to 1000-1080° C., and, without any further heating, the material is forged by means of reciprocal forging into a round rod having along the entire length thereof a forging ratio of 1.5 or greater; a step for obtaining a secondary forged material, that forms the large diameter flange portion and the small diameter shaft portion, in which without reheating, the small diameter shaft portion is formed by means of reciprocal forging at a temperature where the surface temperature of the primary forged material never falls more than 200° C. lower than the abovementioned material heating temperature and the forging is completed before the surface temperature of the final forged portion falls more than 300° C. lower than the abovementioned heating temperature; and a step for performing a solution heat treatment in which the secondary forged material is heated to 1040-1100° C. for 30 minutes or longer.
摘要翻译：提供一种在大直径凸缘部分和小直径轴部分中实现均匀的微观结构的阶梯式锻造材料的制造方法。用于制造阶梯式锻造材料的方法包括以下步骤：获得将奥氏体不锈钢坯料加热至1000-1080℃的初级锻造材料的步骤，并且在不进一步加热的情况下，通过在锻造比为1.5以上的往复锻造方法中，锻造成整个长度的圆棒; 形成大直径凸缘部和小直径轴部的第二锻造材料的步骤，其中，在不进行再加热的情况下，通过往复锻造而形成小直径轴部，该温度是在初级锻造材料从上述材料加热温度下降到200℃以下，在最终锻造部件的表面温度比上述加热温度低300℃以下完成锻造。以及将二次锻造材料加热至1040〜1100℃的固溶热处理30分钟以上的工序。

10. 发明申请

US20120085465A1 CARBURIZED COMPONENT AND MANUFACTURING METHOD 有权
标题翻译：加固组件和制造方法
公开(公告)号：US20120085465A1
公开(公告)日：2012-04-12
申请号：US13304733
申请日：2011-11-28
申请人： Yutaka Neishi , Takanari Hamada , Hidekazu Sueno , Yuji Kobayashi , Hideaki Sugiura
发明人： Yutaka Neishi , Takanari Hamada , Hidekazu Sueno , Yuji Kobayashi , Hideaki Sugiura
IPC分类号： C23C8/22 , C22C38/32 , C22C38/22 , C22C38/44 , C22C38/20 , C22C38/02
CPC分类号： C23C8/20 , C21D1/06 , C21D7/06 , C21D9/28 , C21D9/32 , C21D9/40 , C23C8/44 , C23C8/64
摘要： A carburized component with improved fatigue strength has a base steel containing, by mass %, C: 0.15-0.25%, Si: 0.03-0.50%, Mn: more than 0.60% and not more than 1.5%, P≦0.015%, S: 0.006-0.030%, Cr: 0.05-2.0%, Al≦0.10%, N≦0.03%, and O≦0.0020%, and optionally at least one element selected from Mo, Cu, Ni, B, Ti, Nb and V, the balance being Fe and impurities. A surface hardened layer portion satisfies: (a) average carbon concentration in the region from the outermost surface to a point of 0.2 mm depth of 0.35-0.60 mass %, (b) surface roughness Rz≦15 μm, and (c) σr(0)≦-800 MPa, σr(100)≦-800 MPa, and residual stress intensity index Ir≦80000, wherein Ir is calculated by [Ir=∫|σr(y)|dy], where y μm is the depth from the outermost surface and σr(y) is the residual stress for the points from the outermost surface to a depth of 100 μm with the range of y from 0 to 100 (μm).
摘要翻译：具有改善的疲劳强度的渗碳部件具有以质量％计含有C：0.15-0.25％，Si：0.03-0.50％，Mn：大于0.60％且不大于1.5％的基础钢，P＆lt; L; 0.015％，S ：0.006-0.030％，Cr：0.05-2.0％，Al＆lt; N1; 0.10％，N＆lt; NlE; 0.03％，O＆lt; E; 0.0020％，以及任选的至少一种选自Mo，Cu，Ni，B，Ti，Nb和V ，余量为Fe和杂质。表面硬化层部分满足：（a）从最外表面到0.2mm深度的区域的平均碳浓度为0.35-0.60质量％，（b）表面粗糙度Rz＆lt; ll;15μm，（c）＆sgr; r（0）＆nlE; -800MPa，＆sgr; r（100）＆nlE; -800MPa，残余应力强度指数Ir＆nlE; 80000，其中Ir由[Ir =∫|＆sgr; r（y）| dy] ，其中yμm是从最外表面的深度，并且r（y）是从最外表面到100μm深度的点的残余应力，y的范围为0至100（μm）。

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