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1. 发明授权

US5830285A Fine graphite uniform dispersion steel excellent in cold machinability, cuttability and hardenability, and production method for the same 失效
标题翻译：冷加工性，切断性和淬透性优异的细石墨均匀分散钢及其制造方法
公开(公告)号：US5830285A
公开(公告)日：1998-11-03
申请号：US700355
申请日：1996-08-23
申请人： Sakae Katayama , Toshimi Tarui , Masahiro Toda , Ken-ichiro Naito
发明人： Sakae Katayama , Toshimi Tarui , Masahiro Toda , Ken-ichiro Naito
IPC分类号： C21D1/26 , C21D1/84 , C21D5/14 , C21D8/06 , C22C38/12 , C22C38/60 , C22C38/04 , C22C38/06
CPC分类号： C22C38/12 , C21D1/26 , C21D1/84 , C21D8/06 , C22C38/60 , C21D2211/005 , C21D2211/006 , C21D5/14 , F16H2061/145
摘要： A fine graphite uniform dispersion steel material excellent in cold workability, cuttability and hardenability, which has graphite finely and uniformly dispersed therein, and a production method for producing the same. The steel contains at least 0.30 to 1.0% of C, 0.4 to 1.3% of Si, 0.3 to 1.0% of Mn, 0.0003 to 0.006% of B, 0.002 to 0.010% of N and 0.05 to 0.20% of Mo as the basic components and contains graphite having a mean particle diameter of not more than 4.0 .mu.m and a number of particles per unit and of at least 3,000 per mm.sup.2. The production method includes at least the steps of cooling the steel having these components at a cooling start temperature of not less than an A.sub.rl point, a cooling end temperature of not more than an M.sub.s point and a mean cooling rate of 5.degree. to 100.degree. C./s.
摘要翻译： PCT No.PCT / JP95 / 00276 Sec。 371日期：1996年8月23日 102（e）日期1996年8月23日PCT提交1995年2月24日PCT公布。公开号WO95 / 23241 日期1995年8月31日具有精细且均匀分散石墨的冷加工性，切削性和淬透性优异的细石墨均匀分散钢及其制造方法。该钢含有C：0.30〜1.0％，Si：0.4〜1.3％，Mn：0.3〜1.0％，B：0.003〜0.006％，N：0.002〜0.010％，Mo：0.05〜0.20％并且含有平均粒径不大于4.0μm的石墨和每单位数量的颗粒数和至少3,000个/ mm 2的石墨。该制造方法至少包括在不低于Arl点的冷却开始温度，不高于Ms点的冷却结束温度和5℃至100℃的平均冷却速度下冷却具有这些组分的钢的步骤 C./s。

2. 发明授权

US06602359B1 Bar or wire product for use in cold forging and method for producing the same 有权
标题翻译：用于冷锻的棒材或线材及其制造方法
公开(公告)号：US06602359B1
公开(公告)日：2003-08-05
申请号：US09914128
申请日：2001-08-22
申请人： Tatsuro Ochi , Hideo Kanisawa , Ken-ichiro Naito
发明人： Tatsuro Ochi , Hideo Kanisawa , Ken-ichiro Naito
IPC分类号： C22C3802
CPC分类号： C22C38/28 , C21D1/32 , C21D8/06 , C21D9/525 , C21D2221/10 , C22C38/04 , C22C38/06 , C22C38/32
摘要： The present invention provides a steel bar or wire rod for cold forging excellent in ductility after spheroidizing annealing and capable of preventing the occurrence of cracking in the steel material during cold forging, which cracking has so far been a problem when manufacturing machine structural components by cold forging, and a method to produce the same. Specifically, a steel bar or wire rod for cold forging according to the present invention has a chemical composition comprising, in mass, 0.1 to 0.65% of C, 0.01 to 0.5% of Si, 0.2 to 1.7% of Mn, 0.001 to 0.15% of S, 0.015 to 0.1% of Al, 0.0005 to 0.007% of B, and the restricted elements of 0.035% or less of P, 0.01% or less of N and 0.003% or less of O, with the balance consisting of Fe and unavoidable impurities, and is characterized in that: the area percentage of ferrite structure is 10% or less at the portion from the surface to the depth of 0.15 time the radius of the steel bar or wire rod; the other portion consists substantially of one or more of martensite, bainite and pearlite; and further the average hardness of the portion from the depth of 0.5 time its radius to its center is less than the hardness of its surface layer (the portion from the surface to the depth of 0.15 times the radius) by HV 20 or more.
摘要翻译：本发明提供一种用于在球化退火后具有优异的延展性的冷锻钢筋或线材，并且能够防止在冷锻期间钢材中发生裂纹，但是当制冷机构结构部件被冷却时，这是迄今为止的一个问题锻造及其制造方法。具体地说，根据本发明的用于冷锻的钢筋或线材具有以下组成的化学成分：质量分数为C：C：0.01〜0.5％，Si：0.01〜0.5％，Mn：0.2〜1.7％，0.001〜0.15％的S，0.015〜0.1％的Al，0.0005〜0.007％的B，限制元素为0.035％以下的P，0.01％以下的N和0.003％以下的O，余量由Fe和不可避免的杂质，其特征在于，在钢筋或线材的半径的表面到深度的0.15倍的部分，铁素体组织的面积百分比为10％以下; 另一部分基本上由马氏体，贝氏体和珠光体中的一种或多种组成; 并且从半径的0.5倍的深度到其中心的部分的平均硬度小于其表面层（表面到半径的0.15倍的部分）的硬度为HV20以上。

3. 发明授权

US06866724B2 Steel bar or wire rod for cold forging and method of producing the same 有权
标题翻译：用于冷锻的钢筋或线材及其制造方法
公开(公告)号：US06866724B2
公开(公告)日：2005-03-15
申请号：US10168650
申请日：2000-12-22
申请人： Tatsuro Ochi , Hideo Kanisawa , Ken-ichiro Naito
发明人： Tatsuro Ochi , Hideo Kanisawa , Ken-ichiro Naito
IPC分类号： C21D8/06 , C21D1/32 , C21D9/52 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/60 , C22C38/02
CPC分类号： C21D9/525 , C21D1/32 , C21D8/06 , C21D2211/002 , C21D2211/008 , C21D2211/009 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/22
摘要： A bar or wire product for use in cold forging, characterized in that it comprises a steel having the chemical composition, in mass %: C: 0.1 to 0.6%, Si: 0.01 to 0.5%, Mn: 0.2 to 1.7%, S: 0.001 to 0.15%, Al: 0.015 to 0.05%, N: 0.003 to 0.025%, P: 0.035% or less, O: 0.003% or less and balance: Fe and inevitable impurities, and it has, in the region from the surface thereof to the depth of the radius thereof×0.15, a structure wherein ferrite accounts for 10 area % or less and the balance is substantially one or more of martensite, bainite and pearlite, and the average hardness in the region from the depth of the radius thereof×0.5 to the center thereof is less than that of the surface layer thereof by 20 or more of HV; and a method for producing the bar or wire product. The bar or wire product is excellent in the ductility after spheroidizing and thus allows the prevention of occurrence of cracks in a steel product during cold forging, which has conventionally been a problem in manufacturing structural parts for a machine by cold forging.
摘要翻译：一种用于冷锻的棒材或线材制品，其特征在于它包括质量％：C：0.1至0.6％，Si：0.01至0.5％，Mn：0.2至1.7％的化学成分的钢，S： 0.001〜0.15％，Al：0.015〜0.05％，N：0.003〜0.025％，P：0.035％以下，O：0.003％以下，余量：Fe和不可避免的杂质，其半径为x0.15的深度，其中铁素体占10面积％以下，余量基本上为马氏体，贝氏体和珠光体的一种以上，从半径方向的区域的平均硬度其中心部分的中心部分的表面层的厚度小于HV的20以上; 以及用于制造棒材或线材制品的方法。棒材或线材制品在球化后的延展性优异，因此能够防止在冷锻期间的钢制品中产生裂纹，这在制造冷锻机械的结构部件时一直存在问题。

4. 发明授权

US06309443B1 Simple ladle refining method 有权
标题翻译：简单钢包精炼方法
公开(公告)号：US06309443B1
公开(公告)日：2001-10-30
申请号：US09530159
申请日：2000-04-25
申请人： Shinya Kitamura , Ken-ichiro Naito , Hikofumi Taniishi
发明人： Shinya Kitamura , Ken-ichiro Naito , Hikofumi Taniishi
IPC分类号： C21C535
CPC分类号： C21C7/072 , B23K26/0619 , B23K26/364 , B23K2103/04 , C21C7/068 , C21D8/1294
摘要： The present invention provides a simplified ladle refining process capable of efficiently heating a molten steel in a short period of time while scattering and adhesion of splashes and erosion of refractories are suppressed. A simplified ladle refining process for refining a molten steel in a ladle comprising inserting an immersion snorkel into a ladle and blowing an oxidizing gas onto the surface of a molten steel within the immersion snorkel through a lance while the molten steel is being stirred by blowing an inert gas through the bottom of the ladle, wherein the lance has a ratio (d0/dt) of a nozzle outlet diameter d0 (mm) to a nozzle throat diameter dt (mm) of from 1.2&agr; to 2.5&agr; wherein &agr; is defined as a function of a back pressure.
摘要翻译：本发明提供了一种能够在飞散期间在短时间内有效地加热钢水并且抑制飞溅物的附着和耐火材料侵蚀的简化的钢包精炼方法。一种用于精炼钢包中的钢水的简化的钢包精炼方法，包括将浸入式通气管插入钢包中，并且通过喷枪将钢水搅拌通过喷枪将氧化气体吹入浸入式潜水管内的钢水表面上惰性气体通过钢包的底部，其中喷枪具有喷嘴出口直径d0（mm）与喷嘴喉部直径dt（mm）之间的比率（d0 / dt）为1.2a至2.5alpha，其中α定义为背压的功能。

5. 发明授权

US06858101B1 Steel excellent in forgeability and machinability 有权
标题翻译：钢具有优异的锻造性和可加工性
公开(公告)号：US06858101B1
公开(公告)日：2005-02-22
申请号：US10221119
申请日：2000-09-07
申请人： Masayuki Hashimura , Hiroshi Hirata , Kohichi Isobe , Ken-ichiro Naito , Kenji Fukuyasu
发明人： Masayuki Hashimura , Hiroshi Hirata , Kohichi Isobe , Ken-ichiro Naito , Kenji Fukuyasu
IPC分类号： C22C38/00 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/60
CPC分类号： C22C38/14 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/60
摘要： The present invention is a steel, excellent in machinability, wherein forging workability is improved by suppressing the deterioration of mechanical properties in the direction in which the mechanical properties are the lowest, and more specifically, is a steel excellent in forgeability and machinability, characterized in that: the steel contains, in mass, C: 0.1 to 0.85%, Si: 0.01 to 1.5%, Mn: 0.05 to 2.0%, P: 0.003 to 0.2%, S: 0.003 to 0.5%, and Zr: 0.0003 to 0.01%; the following steel components are controlled in the following ranges respectively, in mass, Al: 0.01% or less, total O: 0.02% or less, and total N: 0.02% or less; the average aspect ratio of MnS grains is 10 or less and the maximum aspect ratio of those is 30 or less; and the balance of the steel components consists of Fe and unavoidable impurities.
摘要翻译：本发明是一种钢，其机械加工性优异，通过抑制力学性能最低的方向的机械性能的劣化，更具体地说，是锻造性和切削性优异的钢，锻造加工性提高。：钢中含有C：0.1〜0.85％，Si：0.01〜1.5％，Mn：0.05〜2.0％，P：0.003〜0.2％，S：0.003〜0.5％，Zr：0.0003〜0.01 ％; 以下钢组分分别控制在以下范围内：Al：0.01％以下，总O：0.02％以下，总N：0.02％以下。 MnS晶粒的平均纵横比为10以下，其最大纵横比为30以下; 钢组分的余量由Fe和不可避免的杂质组成。

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