公开(公告)号：US06764645B2

公开(公告)日：2004-07-20

申请号：US10305064

申请日：2002-11-27

申请人： Masakazu Hayaishi ,  Takashi Kano ,  Kazuhisa Ishida ,  Yutaka Kurebayashi ,  Makoto Hobo

发明人： Masakazu Hayaishi ,  Takashi Kano ,  Kazuhisa Ishida ,  Yutaka Kurebayashi ,  Makoto Hobo

IPC分类号： C22C3814

CPC分类号： C22C38/60 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14

摘要： Disclosed is a steel for machine structural use having good machinability and chip-breakability as well as a method of producing the steel. The steel consists essentially of, by wt. %, C: 0.05-0.8%, Si: 0.01-2.0%, Mn: 0.1-3.5%, S: 0.01-0.2%, Al: 0.001-0.020%, Ca: 0.0005-0.02%, O: 0.0005-0.01% and N: 0.001-0.04%, and further, one or both of Ti: 0.002-0.010% and Zr: 0.002-0.025%, the balance being Fe and inevitable impurities. At production of the steel controlled deoxidization is conducted by operation meeting certain conditions so that at least a certain amount of “duplex inclusion” having a specific chemical composition may be formed, and Ti and/or Zr is added to precipitate finely dispersed MnS inclusion particles with nuclei of Ti-oxide and/or Zr-oxide. The finely dispersed MnS inclusions must share a determined part of the total sulfide inclusions.

摘要翻译： 公开了一种具有良好的机械加工性和断屑性的机械结构用钢以及钢的制造方法。 钢基本上由（重量） ％，C：0.05-0.8％，Si：0.01-2.0％，Mn：0.1-3.5％，S：0.01-0.2％，Al：0.001-0.020％，Ca：0.0005-0.02％，O：0.0005-0.01％ 和N：0.001-0.04％，进一步，Ti：0.002-0.010％和Zr：0.002-0.025％中的一种或两种，余量为Fe和不可避免的杂质。 在钢管控制脱氧的生产中，通过满足某些条件的操作进行操作，使得可以形成至少一定量的具有特定化学组成的“双相夹杂物”，并加入Ti和/或Zr以沉淀细分散的MnS夹杂物颗粒 具有Ti氧化物和/或氧化锆的核。 精细分散的MnS夹杂物必须共享硫化物总含量的确定部分。

公开(公告)号：US20100139451A1

公开(公告)日：2010-06-10

申请号：US12630536

申请日：2009-12-03

申请人： Isamu SAITO ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu SAITO ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： F16C3/06 ,  B21K1/08

CPC分类号： F16C3/06 ,  B21K1/08 ,  C23C8/32 ,  Y10T29/49286 ,  Y10T74/2173

摘要： The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115≧70 C+8 Si+23 Mn+11 Cu+128 Cr+83 Mo≧50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 μm or less.

摘要翻译： 本发明涉及具有高疲劳强度和良好的弯曲矫正性的曲轴件及其制造方法。 钢制曲轴构件主要由铁素体和珍珠岩的两相结构组成。 所述钢包含C，Ni，Mn和Cr作为要素，Si，Cu，Mo，Ti，V，Nb，Ca和S作为可以包含的任意元素，C的量在0.20〜 0.50重量％，Si在0〜0.6重量％的范围内，Mn在0.5〜1.5重量％的范围内，Cu在0〜0.7重量％的范围内，Ni在0.05〜1.5重量％的范围内，Cr在 0.05〜0.45重量％的范围，Mo在0〜0.5重量％的范围内，满足条件115≥70℃+ 8Si + 23 Mn + 11 Cu + 128 Cr + 83Mo≥50。 构件表面的一部分至少设置有平均硬度在300至450HV范围内的硬质氮化物层。 珍珠岩的层状间隔为0.3μm以下。

公开(公告)号：US08911566B2

公开(公告)日：2014-12-16

申请号：US12958855

申请日：2010-12-02

申请人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： F16C3/06 ,  B21K1/08

CPC分类号： F16C3/06 ,  B21K1/08 ,  C23C8/32 ,  Y10T29/49286 ,  Y10T74/2173

摘要： A nitrocarburized crankshaft member made of a steel that includes C in an amount by weight of 0.25 to 0.32% as a required element and an optional element that may be included, and Fe and inevitable impurities in a remaining portion. The steel-made crankshaft member mainly includes ferrite and perlite, wherein at least a portion of the steel surface thereof having a ferrite surface area of 50% or greater is imparted with a nitrocarburized hard layer. The nitrocarburized hard layer includes a surface compound layer suppressed to a thickness of 10 to 35 μm, and a nitrogen diffusion zone below the surface compound layer having a diffusion depth of 700 μm or greater. The steel includes C, Si, Mn, Cu, Ni, and Cr as the required elements and Mo, N, s-Al, and Ti as the optional elements.

摘要翻译： 由钢制成的氮碳共渗曲轴构件，其包含作为所需元素的重量为0.25〜0.32％的C和可以包含的任选元素，剩余部分中的Fe和不可避免的杂质。 钢制曲轴构件主要包括铁素体和珍珠岩，其中具有铁素体表面积为50％以上的钢表面的至少一部分被赋予了氮碳共渗硬化层。 氮碳共渗硬化层包括被抑制为10〜35μm厚度的表面化合物层和扩散深度为700μm以上的表面化合物层下方的氮扩散区。 钢包含C，Si，Mn，Cu，Ni和Cr作为所需元素，Mo，N，s-Al和Ti作为任选元素。

公开(公告)号：US08685177B2

公开(公告)日：2014-04-01

申请号：US12630536

申请日：2009-12-03

申请人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

发明人： Isamu Saito ,  Yoshihiro Takitani ,  Shinichiro Kato ,  Makoto Hobo ,  Keiichiro Kamiya ,  Takahiro Miyazaki ,  Takashi Kano

IPC分类号： C21D8/00 ,  C21D9/30 ,  C23C8/26

CPC分类号： F16C3/06 ,  B21K1/08 ,  C23C8/32 ,  Y10T29/49286 ,  Y10T74/2173

摘要： The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115≧70C+8Si+23Mn+11Cu+128Cr+83Mo≧50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 μm or less.

摘要翻译： 本发明涉及具有高疲劳强度和良好的弯曲矫正性的曲轴件及其制造方法。 钢制曲轴构件主要由铁素体和珍珠岩的两相结构组成。 所述钢包含C，Ni，Mn和Cr作为要素，Si，Cu，Mo，Ti，V，Nb，Ca和S作为可以包含的任意元素，C的量在0.20〜 0.50重量％，Si在0〜0.6重量％的范围内，Mn在0.5〜1.5重量％的范围内，Cu在0〜0.7重量％的范围内，Ni在0.05〜1.5重量％的范围内，Cr在 0.05〜0.45重量％的范围，Mo在0〜0.5重量％的范围内，满足条件115≥70℃+ 8Si + 23Mn + 11Cu + 128Cr +83Mo≥50。 构件表面的一部分至少设置有平均硬度在300至450HV范围内的硬质氮化物层。 珍珠岩的层状间隔为0.3μm以下。

公开(公告)号：US20070144619A1

公开(公告)日：2007-06-28

申请号：US11437872

申请日：2006-05-22

申请人： Tetsuya Asai ,  Yoshihiro Takitani ,  Masaki Amano ,  Makoto Hobo ,  Kazuyoshi Kimura ,  Katsunori Takada

发明人： Tetsuya Asai ,  Yoshihiro Takitani ,  Masaki Amano ,  Makoto Hobo ,  Kazuyoshi Kimura ,  Katsunori Takada

IPC分类号： C23C8/32

CPC分类号： C22C38/60 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/50 ,  C23C8/32 ,  F16C3/08 ,  F16C2204/64

摘要： A nitrocarburized microalloyed steel member consists of a microalloyed steel that includes a nitrocarburized layer on a surface, a cross-sectional structure of which steel except for the nitrocarburized layer includes a ferrite and pearlite structure. The microalloyed steel mainly consists of Fe and has a composition: C having a content of 0.30 mass % or more and 0.50 mass % or less; Si having a content of 0.05 mass % or more and 0.30 mass % or less; Mn having a content of 0.50 mass % or more and 1.00 mass % or less; S having a content of 0.03 mass % or more and 0.20 mass % or less; Cu having a content of 0.05 mass % or more and 0.60 mass % or less; Ni having a content of 0.02 mass % or more and 1.00 mass % or less; and Cr having a content of 0.05 mass % or more and 0.30 mass % or less. If the contents of the Cu, the Ni, and the Cr are represented by WCu, WNi, and WCr mass %, respectively, and composition parameters F1 and F2 are 185WCr+50WCu and 8+4WNi+1.5WCu−44WCr, respectively, then the composition parameters F1 and F2 satisfy F1>20 and F2>0.

摘要翻译： 氮碳共渗微合金钢构件由包括表面上的氮碳共渗层的微合金化钢构成，除了氮碳共渗层之外的钢的截面结构包括铁素体和珠光体组织。 微合金化钢主要由Fe组成，组成为：含有0.30质量％以上至0.50质量％以下的C; Si含量为0.05质量％以上且0.30质量％以下的Si; Mn为0.50质量％以上且1.00质量％以下的Mn; S的含量为0.03质量％以上且0.20质量％以下; Cu含量为0.05质量％以上且0.60质量％以下的Cu; 含量为0.02质量％以上且1.00质量％以下的Ni; Cr为0.05质量％以上且0.30质量％以下的Cr。 如果Cu，Ni和Cr的含量分别由WCu，WNi和WCr质量％表示，组成参数F 1和F 2分别为185WCr + 50WCu和8 + 4WNi + 1.5WCu-44WCr ，则组成参数F 1和F 2满足F 1> 20且F 2> 0。