公开(公告)号：US06596227B2

公开(公告)日：2003-07-22

申请号：US09935583

申请日：2001-08-24

申请人： Yosuke Shindo ,  Hiroshi Yaguchi ,  Takehiro Tsuchida ,  Koichi Sakamoto ,  Masato Kaiso ,  Masami Somekawa ,  Ikuo Hoshikawa ,  Sei Kimura

发明人： Yosuke Shindo ,  Hiroshi Yaguchi ,  Takehiro Tsuchida ,  Koichi Sakamoto ,  Masato Kaiso ,  Masami Somekawa ,  Ikuo Hoshikawa ,  Sei Kimura

IPC分类号： C22C3660

CPC分类号： C22C38/60 ,  C21C7/0006 ,  C21C7/0645 ,  C22C38/002

摘要： A machine structure steel superior in chip disposability and mechanical properties which contains sulfide-type inclusions such that those particles of sulfide-type inclusions with major axes not shorter than 5 &mgr;m have an average aspect ratio not larger than 5.2 and which also contains coarse particles of sulfide-type inclusions such that the relation a/b≦0.25 is satisfied, where a denotes the number of particles of sulfide-type inclusions with major axes not shorter than 20 &mgr;m, and b denotes the number of particles of sulfide-type inclusions with major axes not shorter than 5 &mgr;m. The machine structure steel exhibits good chip disposability and mechanical properties despite its freedom from lead.

摘要翻译： 一种机械结构钢，具有优异的切屑可处理性和机械性能，其含有硫化物型夹杂物，使得长轴不小于5um的硫化物型夹杂物的平​​均纵横比不大于5.2，并且还含有 硫化物型夹杂物满足a / b <= 0.25的关系，其中a表示长轴不小于20um的硫化物型夹杂物的颗粒数，b表示硫化物型夹杂物的颗粒数 主轴不小于5马姆。 机器结构钢尽管不受铅的影响，但具有良好的切屑可处理性和机械性能。

公开(公告)号：US07267729B2

公开(公告)日：2007-09-11

申请号：US10737764

申请日：2003-12-18

申请人： Masamichi Chiba ,  Masato Kaiso

发明人： Masamichi Chiba ,  Masato Kaiso

IPC分类号： H01F1/147

CPC分类号： C22C38/04 ,  C21D8/12 ,  H01F1/147

摘要： A soft magnetic low-carbon steel has a chemical composition having a C content of 0.05% by mass or below, Si content of 0.1% or below, a Mn content in the range of 0.10 to 0.50% by mass, a P content of 0.030% by mass or below, a S content in the range of 0.010 to 0.15% by mass, an Al content of 0.01% by mass or below, a N content of 0.005% by mass or below, and an 0 content of 0.02% by mass or below. In the soft magnetic low-carbon steel, Mn/S mass ratio is 3.0 or above, ferrite grain size is 100 μm or above, ferrite grains contain precipitated MnS grains of grain sizes of 0.2 μm or above in a density in the density range of 0.02 to 0.5 grains/μ2m and the precipitated MnS grains have a mean grain size in the range of 0.05 to 4 μm. The soft magnetic low-carbon steel is excellent in cold-rollability and machinability. Steel parts of the soft magnetic low-carbon steel having complicated shapes can be produced at a high yield.

摘要翻译： 软磁性低碳钢具有C含量为0.05质量％以下，Si含量为0.1％以下，Mn含量为0.10〜0.50质量％，P含量为0.030的化学组成 质量％以下，S含量为0.010〜0.15质量％，Al含量为0.01质量％以下，N含量为0.005质量％以下，0含量为0.02质量％以下 质量或以下。 在软磁性低碳钢中，Mn / S质量比为3.0以上，铁素体粒径为100μm以上，铁素体粒子的粒径为0.2μm以上的析出MnS粒子的密度范围为 0.02〜0.5g / m 2，析出的MnS粒子的平均粒径为0.05〜4μm的范围。 软磁性低碳钢的冷轧性和切削性优异。 可以以高产率生产具有复杂形状的软磁性低碳钢的钢部件。

公开(公告)号：US06579385B2

公开(公告)日：2003-06-17

申请号：US09931093

申请日：2001-08-17

申请人： Hiroshi Yaguchi ,  Yosuke Shindo ,  Takehiro Tsuchida ,  Takahiro Kudou ,  Masato Kaiso ,  Masami Somekawa

发明人： Hiroshi Yaguchi ,  Yosuke Shindo ,  Takehiro Tsuchida ,  Takahiro Kudou ,  Masato Kaiso ,  Masami Somekawa

IPC分类号： C22C3814

CPC分类号： C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/60

摘要： Free machining steel for use in machine structures capable of stably and reliably providing excellent machinability (chip disposability and tool life) and mechanical characteristics (transverse direction toughness) comparable, in a Pb free state, with existent Pb-added steels the machining steel being manufactured so as to contain 0.0005 to 0.02 mass % of Mg and provide a distribution index F1 for the sulfide particles defined by the following equation (1) of 0.4 to 0.65 or a distribution index for the sulfide particles defined by the following equation (2) of 1 to 2.5: F1=X1/(A/n)½  (1), or F2=&sgr;F/X2  (2) as described in the specification.

摘要翻译： 用于能够稳定可靠地提供优良机械加工性（切屑可处理性和刀具寿命）和机械特性（横向韧性）的机器结构的自由加工钢在无铅状态下与现有的Pb添加钢相当，制造的加工钢 含有0.0005〜0.02质量％的Mg，并且由下式（1）定义的硫化物粒子的分布指数F1为0.4〜0.65，或者由下述式（2）定义的硫化物粒子的分布指数为 1至2.5：如说明书中所述。

公开(公告)号：US20050139289A1

公开(公告)日：2005-06-30

申请号：US10737764

申请日：2003-12-18

申请人： Masamichi Chiba ,  Masato Kaiso

发明人： Masamichi Chiba ,  Masato Kaiso

IPC分类号： H01F1/147

CPC分类号： C22C38/04 ,  C21D8/12 ,  H01F1/147

摘要： A soft magnetic low-carbon steel has a chemical composition having a C content of 0.05% by mass or below, Si content of 0.1% or below, a Mn content in the range of 0.10 to 0.50% by mass, a P content of 0.030% by mass or below, a S content in the range of 0.010 to 0.15% by mass, an Al content of 0.01% by mass or below, a N content of 0.005% by mass or below, and an 0 content of 0.02% by mass or below. In the soft magnetic low-carbon steel, Mn/S mass ratio is 3.0 or above, ferrite grain size is 100 μm or above, ferrite grains contain precipitated MnS grains of grain sizes of 0.2 μm or above in a density in the density range of 0.02 to 0.5 grains/μ2m and the precipitated MnS grains have a mean grain size in the range of 0.05 to 4 μm. The soft magnetic low-carbon steel is excellent in cold-rollability and machinability. Steel parts of the soft magnetic low-carbon steel having complicated shapes can be produced at a high yield.

摘要翻译： 软磁性低碳钢具有C含量为0.05质量％以下，Si含量为0.1％以下，Mn含量为0.10〜0.50质量％，P含量为0.030的化学组成 质量％以下，S含量为0.010〜0.15质量％，Al含量为0.01质量％以下，N含量为0.005质量％以下，0含量为0.02质量％以下 质量或以下。 在软磁性低碳钢中，Mn / S质量比为3.0以上，铁素体粒径为100μm以上，铁素体粒子的粒径为0.2μm以上的析出MnS粒子的密度范围为 0.02〜0.5g / m 2，析出的MnS粒子的平均粒径为0.05〜4μm的范围。 软磁性低碳钢的冷轧性和切削性优异。 可以以高产率生产具有复杂形状的软磁性低碳钢的钢部件。

公开(公告)号：US06635129B1

公开(公告)日：2003-10-21

申请号：US09712911

申请日：2000-11-16

申请人： Mutsuhisa Nagahama ,  Masato Kaiso ,  Yoshinori Onoe ,  Shigehiro Mori

发明人： Mutsuhisa Nagahama ,  Masato Kaiso ,  Yoshinori Onoe ,  Shigehiro Mori

IPC分类号： C21D184

CPC分类号： C22C38/04 ,  C21D9/525 ,  C21D9/5732 ,  C22C38/002 ,  C22C38/60

摘要： A wire rod steel superior in straightness, after being subjected to cold drawing. This wire rod steel comprises: C: 0.15 mass % or less (not including 0 mass %), Si: 0.05 mass % or less (including 0 mass %), Mn: 0.3-2 mass %, P: 0.2 mass % or less (including 0 mass %), S: 0.08-0.5 mass %, Al: 0.05 mass % or less (including 0 mass %), N: 0.01 mass % or less (not including 0 mass %), inevitable impurities and Fe as the balance. Its ferrite grain size number of the wire rod steel is No. 11 or less according to ISO 643.

摘要翻译： 冷拔后的直线性优良的线材钢。 该线材钢包括：根据ISO 643，其线棒钢的铁素体晶粒数为11以下。

公开(公告)号：US5762724A

公开(公告)日：1998-06-09

申请号：US701272

申请日：1996-08-22

申请人： Yukio Yamaoka ,  Masao Yamada ,  Masaru Kodama ,  Toshiki Suwa ,  Nobuhiko Ibaraki ,  Masato Kaiso

发明人： Yukio Yamaoka ,  Masao Yamada ,  Masaru Kodama ,  Toshiki Suwa ,  Nobuhiko Ibaraki ,  Masato Kaiso

IPC分类号： C21D8/08 ,  C21D9/52 ,  C21D9/64 ,  C22C38/02 ,  C21D8/06

CPC分类号： C21D9/525 ,  C21D8/08 ,  C21D2211/003 ,  C21D2211/009 ,  C21D9/64

摘要： A high strength steel strand for PC of a wire material having a pearlite structure and containing 0.80 to 1.30% of C, 0.60 to 2.50% of Si and 0.30 to 1.50% of Mn, remainder being Fe and unavoidable impurities, wherein a cementite portion of the wire material comprises a mixed structure of fibrous cementite and granular cementite, the volumetric proportion of the granular cementite to the total cementite is 10 to 40%, the particle diameter of the granular cementite is 40 to 300.ANG., and the strand has a tensile strength of 235 kgf/mm.sup.2 or higher and an elongation of 3.5% or greater.

摘要翻译： 一种具有珠光体组织并且含有C：0.80〜1.30％，Si：0.60〜2.50％，Mn：0.30〜1.50％的PC材的高强度钢丝，余量为Fe和不可避免的杂质，其中， 线材包括纤维渗碳体和颗粒渗碳体的混合结构，粒状渗碳体与总渗碳体的体积比例为10〜40％，粒状渗碳体的粒径为40〜300， 强度为235kgf / mm2以上，伸长率为3.5％以上。

公开(公告)号：US5873958A

公开(公告)日：1999-02-23

申请号：US921517

申请日：1997-09-02

申请人： Koichi Makii ,  Hiroshi Yaguchi ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Masato Kaiso

发明人： Koichi Makii ,  Hiroshi Yaguchi ,  Nobuhiko Ibaraki ,  Takaaki Minamida ,  Masato Kaiso

IPC分类号： C21D8/06 ,  C21D8/08 ,  C21D9/52 ,  C22C38/00 ,  C22C38/18

CPC分类号： C21D8/06 ,  C21D2201/03 ,  C21D2211/003 ,  Y10S977/763

摘要： A steel wire is composed mainly of fine pearlite and/or coarse pearlite, where the lamellar cementite in the pearlite is amorphous or amorphous-like. Alternatively, the wire may be composed mainly of bainite, where the cementite in the bainite is amorphous or amorphous-like. To manufacture the steel wire, a starting steel product is subjected repeatedly to patenting and cold drawing, and then subjected to final drawing at a true strain of 2.0 or above while cooling. The steel wire is higher in strength and toughness than wire whose lamellar cementite consists of nano crystals. The steel wire does not suffer any delamination when subjected to torsion.

摘要翻译： 钢丝主要由细珠光体和/或粗珠光体组成，其中珠光体中的层状渗碳体是无定形的或无定形的。 或者，线可以主要由贝氏体组成，其中贝氏体中的渗碳体是无定形的或非晶态的。 为了制造钢丝，将起始钢产品反复进行专利和冷拉伸，然后在冷却时以2.0或更高的真实应变进行最终拉伸。 钢丝的强度和韧性高于层状渗碳体由纳米晶体组成的钢丝。 钢丝受扭时不会发生分层。